./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-dec-subseq.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-more-dec-subseq.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 ecda181bd3fe1882667151a04232fb9d04292dd6ca3491d98fdc8de5d539856a --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 13:49:26,502 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 13:49:26,504 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 13:49:26,541 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 13:49:26,548 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 13:49:26,550 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 13:49:26,552 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 13:49:26,556 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 13:49:26,558 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 13:49:26,559 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 13:49:26,561 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 13:49:26,562 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 13:49:26,563 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 13:49:26,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 13:49:26,566 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 13:49:26,567 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 13:49:26,568 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 13:49:26,572 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 13:49:26,574 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 13:49:26,587 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 13:49:26,594 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 13:49:26,598 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 13:49:26,599 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 13:49:26,600 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 13:49:26,604 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 13:49:26,606 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 13:49:26,607 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 13:49:26,608 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 13:49:26,609 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 13:49:26,610 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 13:49:26,610 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 13:49:26,611 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 13:49:26,612 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 13:49:26,613 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 13:49:26,614 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 13:49:26,614 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 13:49:26,615 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 13:49:26,615 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 13:49:26,616 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 13:49:26,616 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 13:49:26,617 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 13:49:26,619 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 13:49:26,649 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 13:49:26,649 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 13:49:26,650 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 13:49:26,650 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 13:49:26,651 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 13:49:26,651 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 13:49:26,652 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 13:49:26,652 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 13:49:26,652 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 13:49:26,652 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 13:49:26,653 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 13:49:26,653 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 13:49:26,653 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 13:49:26,654 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 13:49:26,654 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 13:49:26,654 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 13:49:26,654 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 13:49:26,654 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 13:49:26,654 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 13:49:26,655 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 13:49:26,655 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 13:49:26,655 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 13:49:26,655 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 13:49:26,655 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 13:49:26,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 13:49:26,656 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 13:49:26,656 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 13:49:26,656 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 13:49:26,656 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 13:49:26,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 13:49:26,657 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 13:49:26,657 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 13:49:26,657 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 13:49:26,658 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 13:49:26,658 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 13:49:26,658 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ecda181bd3fe1882667151a04232fb9d04292dd6ca3491d98fdc8de5d539856a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 13:49:26,916 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 13:49:26,932 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 13:49:26,935 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 13:49:26,936 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 13:49:26,936 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 13:49:26,937 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c [2023-09-01 13:49:28,044 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 13:49:28,252 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 13:49:28,253 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c [2023-09-01 13:49:28,258 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a50d9bce/243e24acae9949b2bc84bb6343c0d424/FLAG2cda4dce8 [2023-09-01 13:49:28,269 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a50d9bce/243e24acae9949b2bc84bb6343c0d424 [2023-09-01 13:49:28,271 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 13:49:28,273 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 13:49:28,280 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 13:49:28,281 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 13:49:28,284 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 13:49:28,285 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:49:28" (1/1) ... [2023-09-01 13:49:28,286 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70b6293 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:49:28, skipping insertion in model container [2023-09-01 13:49:28,288 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:49:28" (1/1) ... [2023-09-01 13:49:28,295 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 13:49:28,316 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 13:49:28,462 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2023-09-01 13:49:28,469 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 13:49:28,477 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 13:49:28,511 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2023-09-01 13:49:28,519 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 13:49:28,529 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 13:49:28,530 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 13:49:28,536 INFO L208 MainTranslator]: Completed translation [2023-09-01 13:49:28,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:49:28 WrapperNode [2023-09-01 13:49:28,537 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 13:49:28,539 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 13:49:28,539 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 13:49:28,539 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 13:49:28,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:49:28" (1/1) ... [2023-09-01 13:49:28,562 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:49:28" (1/1) ... [2023-09-01 13:49:28,597 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 196 [2023-09-01 13:49:28,597 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 13:49:28,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 13:49:28,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 13:49:28,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 13:49:28,607 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:49:28" (1/1) ... [2023-09-01 13:49:28,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:49:28" (1/1) ... [2023-09-01 13:49:28,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:49:28" (1/1) ... [2023-09-01 13:49:28,622 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:49:28" (1/1) ... [2023-09-01 13:49:28,633 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:49:28" (1/1) ... [2023-09-01 13:49:28,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:49:28" (1/1) ... [2023-09-01 13:49:28,646 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:49:28" (1/1) ... [2023-09-01 13:49:28,650 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:49:28" (1/1) ... [2023-09-01 13:49:28,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 13:49:28,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 13:49:28,656 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 13:49:28,657 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 13:49:28,657 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:49:28" (1/1) ... [2023-09-01 13:49:28,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 13:49:28,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:49:28,718 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 13:49:28,748 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 13:49:28,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 13:49:28,765 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 13:49:28,765 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 13:49:28,766 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 13:49:28,767 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 13:49:28,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 13:49:28,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 13:49:28,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 13:49:28,767 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 13:49:28,767 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 13:49:28,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 13:49:28,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 13:49:28,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 13:49:28,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 13:49:28,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 13:49:28,769 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 13:49:28,917 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 13:49:28,919 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 13:49:29,211 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 13:49:29,330 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 13:49:29,330 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-09-01 13:49:29,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:49:29 BoogieIcfgContainer [2023-09-01 13:49:29,333 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 13:49:29,335 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 13:49:29,335 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 13:49:29,337 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 13:49:29,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 01:49:28" (1/3) ... [2023-09-01 13:49:29,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2528d344 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:49:29, skipping insertion in model container [2023-09-01 13:49:29,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:49:28" (2/3) ... [2023-09-01 13:49:29,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2528d344 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:49:29, skipping insertion in model container [2023-09-01 13:49:29,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:49:29" (3/3) ... [2023-09-01 13:49:29,340 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-dec-subseq.wvr.c [2023-09-01 13:49:29,346 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 13:49:29,355 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 13:49:29,355 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 13:49:29,355 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 13:49:29,427 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 13:49:29,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 178 transitions, 372 flow [2023-09-01 13:49:29,525 INFO L130 PetriNetUnfolder]: 15/176 cut-off events. [2023-09-01 13:49:29,526 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 13:49:29,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 176 events. 15/176 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 108 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 143. Up to 2 conditions per place. [2023-09-01 13:49:29,530 INFO L82 GeneralOperation]: Start removeDead. Operand has 170 places, 178 transitions, 372 flow [2023-09-01 13:49:29,535 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 160 places, 168 transitions, 348 flow [2023-09-01 13:49:29,538 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 13:49:29,546 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 160 places, 168 transitions, 348 flow [2023-09-01 13:49:29,548 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 160 places, 168 transitions, 348 flow [2023-09-01 13:49:29,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 160 places, 168 transitions, 348 flow [2023-09-01 13:49:29,600 INFO L130 PetriNetUnfolder]: 15/168 cut-off events. [2023-09-01 13:49:29,600 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 13:49:29,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 168 events. 15/168 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 109 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 143. Up to 2 conditions per place. [2023-09-01 13:49:29,605 INFO L119 LiptonReduction]: Number of co-enabled transitions 690 [2023-09-01 13:49:34,860 INFO L134 LiptonReduction]: Checked pairs total: 1199 [2023-09-01 13:49:34,860 INFO L136 LiptonReduction]: Total number of compositions: 174 [2023-09-01 13:49:34,872 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 13:49:34,877 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;@18c26ef7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 13:49:34,878 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 13:49:34,884 INFO L130 PetriNetUnfolder]: 5/22 cut-off events. [2023-09-01 13:49:34,885 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 13:49:34,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:49:34,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:49:34,886 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:49:34,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:49:34,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1033780346, now seen corresponding path program 1 times [2023-09-01 13:49:34,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:49:34,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083655301] [2023-09-01 13:49:34,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:49:34,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:49:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:49:35,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:49:35,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:49:35,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083655301] [2023-09-01 13:49:35,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083655301] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:49:35,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:49:35,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 13:49:35,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352348902] [2023-09-01 13:49:35,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:49:35,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 13:49:35,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:49:35,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 13:49:35,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 13:49:35,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 352 [2023-09-01 13:49:35,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 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 13:49:35,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:49:35,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 352 [2023-09-01 13:49:35,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:49:35,562 INFO L130 PetriNetUnfolder]: 93/157 cut-off events. [2023-09-01 13:49:35,563 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-09-01 13:49:35,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 157 events. 93/157 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 450 event pairs, 51 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 267. Up to 154 conditions per place. [2023-09-01 13:49:35,566 INFO L137 encePairwiseOnDemand]: 349/352 looper letters, 21 selfloop transitions, 2 changer transitions 0/24 dead transitions. [2023-09-01 13:49:35,566 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 24 transitions, 106 flow [2023-09-01 13:49:35,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 13:49:35,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 13:49:35,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 480 transitions. [2023-09-01 13:49:35,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2023-09-01 13:49:35,588 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 480 transitions. [2023-09-01 13:49:35,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 480 transitions. [2023-09-01 13:49:35,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:49:35,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 480 transitions. [2023-09-01 13:49:35,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 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 13:49:35,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 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 13:49:35,610 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 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 13:49:35,612 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 58 flow. Second operand 3 states and 480 transitions. [2023-09-01 13:49:35,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 24 transitions, 106 flow [2023-09-01 13:49:35,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 24 transitions, 98 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 13:49:35,617 INFO L231 Difference]: Finished difference. Result has 24 places, 24 transitions, 62 flow [2023-09-01 13:49:35,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=24, PETRI_TRANSITIONS=24} [2023-09-01 13:49:35,622 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -1 predicate places. [2023-09-01 13:49:35,622 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 24 transitions, 62 flow [2023-09-01 13:49:35,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 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 13:49:35,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:49:35,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:49:35,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 13:49:35,627 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:49:35,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:49:35,636 INFO L85 PathProgramCache]: Analyzing trace with hash -25586866, now seen corresponding path program 1 times [2023-09-01 13:49:35,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:49:35,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486440161] [2023-09-01 13:49:35,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:49:35,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:49:35,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:49:35,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:49:35,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:49:35,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486440161] [2023-09-01 13:49:35,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486440161] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:49:35,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075595697] [2023-09-01 13:49:35,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:49:35,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:49:35,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:49:35,761 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 13:49:35,787 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 13:49:35,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:49:35,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 13:49:35,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:49:35,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:49:35,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:49:36,066 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 13:49:36,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075595697] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 13:49:36,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 13:49:36,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 9 [2023-09-01 13:49:36,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791005346] [2023-09-01 13:49:36,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:49:36,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:49:36,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:49:36,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:49:36,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-09-01 13:49:36,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 352 [2023-09-01 13:49:36,156 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 24 transitions, 62 flow. Second operand has 5 states, 5 states have (on average 145.8) internal successors, (729), 5 states have internal predecessors, (729), 0 states have call successors, (0), 0 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 13:49:36,157 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:49:36,157 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 352 [2023-09-01 13:49:36,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:49:36,272 INFO L130 PetriNetUnfolder]: 170/274 cut-off events. [2023-09-01 13:49:36,272 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 13:49:36,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 565 conditions, 274 events. 170/274 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 946 event pairs, 36 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 550. Up to 102 conditions per place. [2023-09-01 13:49:36,274 INFO L137 encePairwiseOnDemand]: 345/352 looper letters, 32 selfloop transitions, 8 changer transitions 0/41 dead transitions. [2023-09-01 13:49:36,275 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 41 transitions, 178 flow [2023-09-01 13:49:36,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 13:49:36,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 13:49:36,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 899 transitions. [2023-09-01 13:49:36,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4256628787878788 [2023-09-01 13:49:36,278 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 899 transitions. [2023-09-01 13:49:36,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 899 transitions. [2023-09-01 13:49:36,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:49:36,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 899 transitions. [2023-09-01 13:49:36,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 149.83333333333334) internal successors, (899), 6 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:36,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 352.0) internal successors, (2464), 7 states have internal predecessors, (2464), 0 states have call successors, (0), 0 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 13:49:36,285 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 352.0) internal successors, (2464), 7 states have internal predecessors, (2464), 0 states have call successors, (0), 0 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 13:49:36,286 INFO L175 Difference]: Start difference. First operand has 24 places, 24 transitions, 62 flow. Second operand 6 states and 899 transitions. [2023-09-01 13:49:36,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 41 transitions, 178 flow [2023-09-01 13:49:36,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 41 transitions, 174 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 13:49:36,287 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 93 flow [2023-09-01 13:49:36,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=93, PETRI_PLACES=30, PETRI_TRANSITIONS=27} [2023-09-01 13:49:36,288 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 5 predicate places. [2023-09-01 13:49:36,288 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 93 flow [2023-09-01 13:49:36,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.8) internal successors, (729), 5 states have internal predecessors, (729), 0 states have call successors, (0), 0 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 13:49:36,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:49:36,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:49:36,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 13:49:36,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:49:36,496 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:49:36,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:49:36,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1406989011, now seen corresponding path program 1 times [2023-09-01 13:49:36,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:49:36,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939091834] [2023-09-01 13:49:36,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:49:36,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:49:36,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:49:36,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:49:36,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:49:36,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939091834] [2023-09-01 13:49:36,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939091834] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:49:36,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:49:36,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 13:49:36,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226481551] [2023-09-01 13:49:36,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:49:36,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 13:49:36,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:49:36,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 13:49:36,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 13:49:36,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 352 [2023-09-01 13:49:36,643 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 93 flow. Second operand has 4 states, 4 states have (on average 153.25) internal successors, (613), 4 states have internal predecessors, (613), 0 states have call successors, (0), 0 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 13:49:36,643 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:49:36,643 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 352 [2023-09-01 13:49:36,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:49:36,787 INFO L130 PetriNetUnfolder]: 294/476 cut-off events. [2023-09-01 13:49:36,787 INFO L131 PetriNetUnfolder]: For 175/175 co-relation queries the response was YES. [2023-09-01 13:49:36,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1150 conditions, 476 events. 294/476 cut-off events. For 175/175 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1767 event pairs, 55 based on Foata normal form. 0/443 useless extension candidates. Maximal degree in co-relation 1126. Up to 250 conditions per place. [2023-09-01 13:49:36,792 INFO L137 encePairwiseOnDemand]: 345/352 looper letters, 46 selfloop transitions, 16 changer transitions 0/62 dead transitions. [2023-09-01 13:49:36,792 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 62 transitions, 336 flow [2023-09-01 13:49:36,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:49:36,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:49:36,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 799 transitions. [2023-09-01 13:49:36,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45397727272727273 [2023-09-01 13:49:36,795 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 799 transitions. [2023-09-01 13:49:36,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 799 transitions. [2023-09-01 13:49:36,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:49:36,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 799 transitions. [2023-09-01 13:49:36,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 159.8) internal successors, (799), 5 states have internal predecessors, (799), 0 states have call successors, (0), 0 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 13:49:36,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 352.0) internal successors, (2112), 6 states have internal predecessors, (2112), 0 states have call successors, (0), 0 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 13:49:36,801 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 352.0) internal successors, (2112), 6 states have internal predecessors, (2112), 0 states have call successors, (0), 0 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 13:49:36,802 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 93 flow. Second operand 5 states and 799 transitions. [2023-09-01 13:49:36,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 62 transitions, 336 flow [2023-09-01 13:49:36,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 62 transitions, 332 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 13:49:36,808 INFO L231 Difference]: Finished difference. Result has 35 places, 41 transitions, 234 flow [2023-09-01 13:49:36,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=234, PETRI_PLACES=35, PETRI_TRANSITIONS=41} [2023-09-01 13:49:36,809 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 10 predicate places. [2023-09-01 13:49:36,809 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 41 transitions, 234 flow [2023-09-01 13:49:36,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 153.25) internal successors, (613), 4 states have internal predecessors, (613), 0 states have call successors, (0), 0 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 13:49:36,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:49:36,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:49:36,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 13:49:36,810 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:49:36,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:49:36,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1352553143, now seen corresponding path program 2 times [2023-09-01 13:49:36,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:49:36,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939488843] [2023-09-01 13:49:36,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:49:36,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:49:36,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:49:36,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:49:36,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:49:36,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939488843] [2023-09-01 13:49:36,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939488843] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:49:36,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:49:36,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 13:49:36,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640230210] [2023-09-01 13:49:36,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:49:36,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 13:49:36,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:49:36,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 13:49:36,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 13:49:36,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 352 [2023-09-01 13:49:36,914 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 41 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 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 13:49:36,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:49:36,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 352 [2023-09-01 13:49:36,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:49:37,011 INFO L130 PetriNetUnfolder]: 477/766 cut-off events. [2023-09-01 13:49:37,012 INFO L131 PetriNetUnfolder]: For 1197/1219 co-relation queries the response was YES. [2023-09-01 13:49:37,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2701 conditions, 766 events. 477/766 cut-off events. For 1197/1219 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3156 event pairs, 137 based on Foata normal form. 16/766 useless extension candidates. Maximal degree in co-relation 2675. Up to 433 conditions per place. [2023-09-01 13:49:37,017 INFO L137 encePairwiseOnDemand]: 349/352 looper letters, 62 selfloop transitions, 4 changer transitions 2/70 dead transitions. [2023-09-01 13:49:37,017 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 70 transitions, 562 flow [2023-09-01 13:49:37,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 13:49:37,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 13:49:37,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 507 transitions. [2023-09-01 13:49:37,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48011363636363635 [2023-09-01 13:49:37,019 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 507 transitions. [2023-09-01 13:49:37,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 507 transitions. [2023-09-01 13:49:37,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:49:37,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 507 transitions. [2023-09-01 13:49:37,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 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 13:49:37,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 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 13:49:37,024 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 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 13:49:37,024 INFO L175 Difference]: Start difference. First operand has 35 places, 41 transitions, 234 flow. Second operand 3 states and 507 transitions. [2023-09-01 13:49:37,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 70 transitions, 562 flow [2023-09-01 13:49:37,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 70 transitions, 562 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 13:49:37,032 INFO L231 Difference]: Finished difference. Result has 38 places, 44 transitions, 271 flow [2023-09-01 13:49:37,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=271, PETRI_PLACES=38, PETRI_TRANSITIONS=44} [2023-09-01 13:49:37,033 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 13 predicate places. [2023-09-01 13:49:37,034 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 44 transitions, 271 flow [2023-09-01 13:49:37,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 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 13:49:37,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:49:37,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:49:37,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 13:49:37,035 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:49:37,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:49:37,036 INFO L85 PathProgramCache]: Analyzing trace with hash -84645957, now seen corresponding path program 1 times [2023-09-01 13:49:37,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:49:37,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782923609] [2023-09-01 13:49:37,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:49:37,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:49:37,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:49:37,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:49:37,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:49:37,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782923609] [2023-09-01 13:49:37,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782923609] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:49:37,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961989669] [2023-09-01 13:49:37,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:49:37,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:49:37,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:49:37,197 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 13:49:37,200 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 13:49:37,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:49:37,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 13:49:37,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:49:37,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:49:37,293 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 13:49:37,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961989669] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:49:37,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 13:49:37,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2023-09-01 13:49:37,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066203212] [2023-09-01 13:49:37,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:49:37,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 13:49:37,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:49:37,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 13:49:37,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 13:49:37,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 352 [2023-09-01 13:49:37,303 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 44 transitions, 271 flow. Second operand has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:37,303 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:49:37,303 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 352 [2023-09-01 13:49:37,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:49:37,420 INFO L130 PetriNetUnfolder]: 398/667 cut-off events. [2023-09-01 13:49:37,421 INFO L131 PetriNetUnfolder]: For 1124/1156 co-relation queries the response was YES. [2023-09-01 13:49:37,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2443 conditions, 667 events. 398/667 cut-off events. For 1124/1156 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2635 event pairs, 91 based on Foata normal form. 46/705 useless extension candidates. Maximal degree in co-relation 2414. Up to 555 conditions per place. [2023-09-01 13:49:37,425 INFO L137 encePairwiseOnDemand]: 349/352 looper letters, 47 selfloop transitions, 2 changer transitions 5/56 dead transitions. [2023-09-01 13:49:37,425 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 56 transitions, 430 flow [2023-09-01 13:49:37,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 13:49:37,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 13:49:37,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 502 transitions. [2023-09-01 13:49:37,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4753787878787879 [2023-09-01 13:49:37,427 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 502 transitions. [2023-09-01 13:49:37,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 502 transitions. [2023-09-01 13:49:37,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:49:37,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 502 transitions. [2023-09-01 13:49:37,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 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 13:49:37,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 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 13:49:37,432 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 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 13:49:37,432 INFO L175 Difference]: Start difference. First operand has 38 places, 44 transitions, 271 flow. Second operand 3 states and 502 transitions. [2023-09-01 13:49:37,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 56 transitions, 430 flow [2023-09-01 13:49:37,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 56 transitions, 426 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 13:49:37,436 INFO L231 Difference]: Finished difference. Result has 40 places, 44 transitions, 273 flow [2023-09-01 13:49:37,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=273, PETRI_PLACES=40, PETRI_TRANSITIONS=44} [2023-09-01 13:49:37,436 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 15 predicate places. [2023-09-01 13:49:37,437 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 44 transitions, 273 flow [2023-09-01 13:49:37,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:37,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:49:37,437 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] [2023-09-01 13:49:37,447 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 13:49:37,643 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 13:49:37,644 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:49:37,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:49:37,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1320014892, now seen corresponding path program 1 times [2023-09-01 13:49:37,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:49:37,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583330462] [2023-09-01 13:49:37,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:49:37,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:49:37,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:49:37,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:49:37,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:49:37,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583330462] [2023-09-01 13:49:37,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583330462] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:49:37,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:49:37,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 13:49:37,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879610965] [2023-09-01 13:49:37,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:49:37,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 13:49:37,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:49:37,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 13:49:37,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 13:49:37,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 352 [2023-09-01 13:49:37,781 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 44 transitions, 273 flow. Second operand has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 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 13:49:37,781 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:49:37,782 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 352 [2023-09-01 13:49:37,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:49:37,929 INFO L130 PetriNetUnfolder]: 448/776 cut-off events. [2023-09-01 13:49:37,929 INFO L131 PetriNetUnfolder]: For 1574/1606 co-relation queries the response was YES. [2023-09-01 13:49:37,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2933 conditions, 776 events. 448/776 cut-off events. For 1574/1606 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3252 event pairs, 242 based on Foata normal form. 42/807 useless extension candidates. Maximal degree in co-relation 2509. Up to 660 conditions per place. [2023-09-01 13:49:37,934 INFO L137 encePairwiseOnDemand]: 347/352 looper letters, 41 selfloop transitions, 2 changer transitions 20/65 dead transitions. [2023-09-01 13:49:37,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 65 transitions, 505 flow [2023-09-01 13:49:37,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:49:37,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:49:37,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 789 transitions. [2023-09-01 13:49:37,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44829545454545455 [2023-09-01 13:49:37,938 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 789 transitions. [2023-09-01 13:49:37,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 789 transitions. [2023-09-01 13:49:37,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:49:37,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 789 transitions. [2023-09-01 13:49:37,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 157.8) internal successors, (789), 5 states have internal predecessors, (789), 0 states have call successors, (0), 0 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 13:49:37,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 352.0) internal successors, (2112), 6 states have internal predecessors, (2112), 0 states have call successors, (0), 0 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 13:49:37,943 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 352.0) internal successors, (2112), 6 states have internal predecessors, (2112), 0 states have call successors, (0), 0 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 13:49:37,943 INFO L175 Difference]: Start difference. First operand has 40 places, 44 transitions, 273 flow. Second operand 5 states and 789 transitions. [2023-09-01 13:49:37,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 65 transitions, 505 flow [2023-09-01 13:49:37,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 65 transitions, 503 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 13:49:37,948 INFO L231 Difference]: Finished difference. Result has 46 places, 45 transitions, 287 flow [2023-09-01 13:49:37,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=287, PETRI_PLACES=46, PETRI_TRANSITIONS=45} [2023-09-01 13:49:37,948 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 21 predicate places. [2023-09-01 13:49:37,949 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 45 transitions, 287 flow [2023-09-01 13:49:37,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 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 13:49:37,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:49:37,949 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 13:49:37,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 13:49:37,950 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:49:37,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:49:37,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1802696178, now seen corresponding path program 1 times [2023-09-01 13:49:37,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:49:37,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803580826] [2023-09-01 13:49:37,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:49:37,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:49:38,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:49:39,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:49:39,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:49:39,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803580826] [2023-09-01 13:49:39,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803580826] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:49:39,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34474798] [2023-09-01 13:49:39,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:49:39,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:49:39,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:49:39,077 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 13:49:39,080 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 13:49:39,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:49:39,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 48 conjunts are in the unsatisfiable core [2023-09-01 13:49:39,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:49:39,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:49:39,411 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 18 treesize of output 20 [2023-09-01 13:49:39,772 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-09-01 13:49:39,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 42 treesize of output 10 [2023-09-01 13:49:39,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:49:39,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:49:40,209 WARN L839 $PredicateComparison]: unable to prove that (or (<= c_~n~0 c_~end~0) (let ((.cse1 (+ (* c_~end~0 4) c_~queue~0.offset)) (.cse3 (+ c_~A~0.offset (* c_~i~0 4)))) (and (forall ((v_ArrVal_173 (Array Int Int)) (~queue~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_173))) (let ((.cse0 (select .cse2 ~queue~0.base))) (or (< (select .cse0 (+ (* c_~start~0 4) c_~queue~0.offset)) (+ c_~v_old~0 1)) (not (= (select .cse0 .cse1) (select (select .cse2 c_~A~0.base) .cse3))))))) (or (forall ((v_ArrVal_173 (Array Int Int)) (~queue~0.base Int)) (not (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_173))) (= (select (select .cse4 ~queue~0.base) .cse1) (select (select .cse4 c_~A~0.base) .cse3))))) (not (= (mod c_~ok~0 256) 0))))) (<= (+ c_~end~0 1) c_~start~0) (< c_~start~0 0) (< c_~last~0 |c_thread1Thread1of1ForFork1_#t~mem1#1|)) is different from false [2023-09-01 13:49:40,310 INFO L321 Elim1Store]: treesize reduction 11, result has 87.1 percent of original size [2023-09-01 13:49:40,311 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 258 treesize of output 251 [2023-09-01 13:49:40,341 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:49:40,342 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 174 treesize of output 185 [2023-09-01 13:49:40,372 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:49:40,373 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 144 treesize of output 137 [2023-09-01 13:49:41,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:49:41,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34474798] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:49:41,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:49:41,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2023-09-01 13:49:41,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904180671] [2023-09-01 13:49:41,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:49:41,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 13:49:41,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:49:41,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 13:49:41,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=696, Unknown=1, NotChecked=56, Total=930 [2023-09-01 13:49:41,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 352 [2023-09-01 13:49:41,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 287 flow. Second operand has 31 states, 31 states have (on average 86.12903225806451) internal successors, (2670), 31 states have internal predecessors, (2670), 0 states have call successors, (0), 0 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 13:49:41,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:49:41,626 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 352 [2023-09-01 13:49:41,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:49:46,981 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_~start~0 4) c_~queue~0.offset)) (.cse6 (+ (* c_~end~0 4) c_~queue~0.offset)) (.cse8 (+ c_~A~0.offset (* c_~i~0 4))) (.cse10 (< c_~last~0 |c_thread1Thread1of1ForFork1_#t~mem1#1|)) (.cse4 (<= c_~n~0 c_~end~0)) (.cse9 (<= (+ c_~end~0 1) c_~start~0)) (.cse1 (+ c_~v_old~0 1)) (.cse2 (not (= (mod c_~ok~0 256) 0))) (.cse11 (= c_~start~0 c_~end~0)) (.cse3 (< c_~start~0 0))) (and (or (and (< (select (select |c_#memory_int| c_~queue~0.base) .cse0) .cse1) .cse2) .cse3 (<= c_~end~0 c_~start~0) (<= c_~n~0 c_~start~0)) (or .cse4 (let ((.cse7 (select (select |c_#memory_int| c_~A~0.base) .cse8))) (and (forall ((~queue~0.base Int)) (let ((.cse5 (select |c_#memory_int| ~queue~0.base))) (or (not (= (select .cse5 .cse6) .cse7)) (< (select .cse5 .cse0) .cse1)))) (or (forall ((~queue~0.base Int)) (not (= (select (select |c_#memory_int| ~queue~0.base) .cse6) .cse7))) .cse2))) .cse9 .cse3 .cse10) (or .cse4 .cse9 .cse3 (< (+ 1 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (and (< |c_#StackHeapBarrier| (+ |c_ULTIMATE.start_main_~#t2~0#1.base| 1)) .cse2 .cse11)) (= c_~ok~0 1) (or .cse4 .cse9 (and .cse2 (< |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| |c_ULTIMATE.start_main_~#t2~0#1.base|) .cse11) .cse3) (or .cse4 (and (forall ((v_ArrVal_173 (Array Int Int)) (~queue~0.base Int)) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_173))) (let ((.cse12 (select .cse13 ~queue~0.base))) (or (< (select .cse12 .cse0) .cse1) (not (= (select .cse12 .cse6) (select (select .cse13 c_~A~0.base) .cse8))))))) (or (forall ((v_ArrVal_173 (Array Int Int)) (~queue~0.base Int)) (not (let ((.cse14 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_173))) (= (select (select .cse14 ~queue~0.base) .cse6) (select (select .cse14 c_~A~0.base) .cse8))))) .cse2)) .cse9 .cse3 .cse10) (or .cse4 .cse9 (and (not (= |c_ULTIMATE.start_main_~#t2~0#1.base| c_~A~0.base)) (< c_~last~0 .cse1) .cse2 .cse11) .cse3))) is different from false [2023-09-01 13:49:49,406 INFO L130 PetriNetUnfolder]: 2576/4316 cut-off events. [2023-09-01 13:49:49,406 INFO L131 PetriNetUnfolder]: For 7316/7316 co-relation queries the response was YES. [2023-09-01 13:49:49,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16370 conditions, 4316 events. 2576/4316 cut-off events. For 7316/7316 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 25460 event pairs, 153 based on Foata normal form. 60/4372 useless extension candidates. Maximal degree in co-relation 16345. Up to 1386 conditions per place. [2023-09-01 13:49:49,436 INFO L137 encePairwiseOnDemand]: 334/352 looper letters, 333 selfloop transitions, 277 changer transitions 126/736 dead transitions. [2023-09-01 13:49:49,437 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 736 transitions, 5810 flow [2023-09-01 13:49:49,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-09-01 13:49:49,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2023-09-01 13:49:49,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 6230 transitions. [2023-09-01 13:49:49,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2602774064171123 [2023-09-01 13:49:49,458 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 6230 transitions. [2023-09-01 13:49:49,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 6230 transitions. [2023-09-01 13:49:49,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:49:49,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 6230 transitions. [2023-09-01 13:49:49,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 91.61764705882354) internal successors, (6230), 68 states have internal predecessors, (6230), 0 states have call successors, (0), 0 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 13:49:49,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 352.0) internal successors, (24288), 69 states have internal predecessors, (24288), 0 states have call successors, (0), 0 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 13:49:49,515 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 352.0) internal successors, (24288), 69 states have internal predecessors, (24288), 0 states have call successors, (0), 0 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 13:49:49,516 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 287 flow. Second operand 68 states and 6230 transitions. [2023-09-01 13:49:49,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 736 transitions, 5810 flow [2023-09-01 13:49:49,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 736 transitions, 5776 flow, removed 16 selfloop flow, removed 3 redundant places. [2023-09-01 13:49:49,547 INFO L231 Difference]: Finished difference. Result has 148 places, 343 transitions, 3632 flow [2023-09-01 13:49:49,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=3632, PETRI_PLACES=148, PETRI_TRANSITIONS=343} [2023-09-01 13:49:49,548 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 123 predicate places. [2023-09-01 13:49:49,548 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 343 transitions, 3632 flow [2023-09-01 13:49:49,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 86.12903225806451) internal successors, (2670), 31 states have internal predecessors, (2670), 0 states have call successors, (0), 0 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 13:49:49,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:49:49,550 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 13:49:49,561 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 13:49:49,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:49:49,756 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:49:49,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:49:49,756 INFO L85 PathProgramCache]: Analyzing trace with hash 2003046256, now seen corresponding path program 2 times [2023-09-01 13:49:49,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:49:49,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926976844] [2023-09-01 13:49:49,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:49:49,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:49:49,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:49:51,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:49:51,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:49:51,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926976844] [2023-09-01 13:49:51,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926976844] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:49:51,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950578742] [2023-09-01 13:49:51,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:49:51,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:49:51,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:49:51,089 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 13:49:51,105 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 13:49:51,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:49:51,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:49:51,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 47 conjunts are in the unsatisfiable core [2023-09-01 13:49:51,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:49:51,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:49:51,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:49:51,237 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 13:49:51,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-09-01 13:49:51,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-09-01 13:49:51,355 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:49:51,356 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 11 treesize of output 11 [2023-09-01 13:49:51,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:49:51,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:49:51,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:49:51,622 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-09-01 13:49:51,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 44 [2023-09-01 13:49:51,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-09-01 13:49:51,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-09-01 13:49:51,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:49:51,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:49:52,601 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:49:52,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 81 [2023-09-01 13:49:52,634 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:49:52,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 2188 treesize of output 1978 [2023-09-01 13:49:52,769 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:49:52,769 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 1140 treesize of output 940 [2023-09-01 13:49:52,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 638 treesize of output 542 [2023-09-01 13:49:52,853 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:49:52,854 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 804 treesize of output 724 [2023-09-01 13:50:00,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:50:00,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950578742] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:50:00,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:50:00,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 32 [2023-09-01 13:50:00,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075257842] [2023-09-01 13:50:00,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:50:00,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-09-01 13:50:00,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:50:00,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-09-01 13:50:00,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=916, Unknown=8, NotChecked=0, Total=1122 [2023-09-01 13:50:02,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 352 [2023-09-01 13:50:02,262 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 343 transitions, 3632 flow. Second operand has 34 states, 34 states have (on average 82.94117647058823) internal successors, (2820), 34 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:50:02,262 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:50:02,263 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 352 [2023-09-01 13:50:02,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:50:12,151 WARN L839 $PredicateComparison]: unable to prove that (and (not (= (mod c_~ok~0 256) 0)) (forall ((v_ArrVal_219 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_219) c_~queue~0.base) (+ (* c_~start~0 4) c_~queue~0.offset)) (+ c_~v_old~0 1))) (<= c_~new~0 c_~v_old~0) (= c_~ok~0 1)) is different from false [2023-09-01 13:50:13,715 INFO L130 PetriNetUnfolder]: 4807/7937 cut-off events. [2023-09-01 13:50:13,715 INFO L131 PetriNetUnfolder]: For 148418/148418 co-relation queries the response was YES. [2023-09-01 13:50:13,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60879 conditions, 7937 events. 4807/7937 cut-off events. For 148418/148418 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 50617 event pairs, 303 based on Foata normal form. 5/7942 useless extension candidates. Maximal degree in co-relation 60808. Up to 2798 conditions per place. [2023-09-01 13:50:13,821 INFO L137 encePairwiseOnDemand]: 335/352 looper letters, 751 selfloop transitions, 412 changer transitions 53/1216 dead transitions. [2023-09-01 13:50:13,822 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 1216 transitions, 17159 flow [2023-09-01 13:50:13,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-09-01 13:50:13,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-09-01 13:50:13,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 5020 transitions. [2023-09-01 13:50:13,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2501993620414673 [2023-09-01 13:50:13,834 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 5020 transitions. [2023-09-01 13:50:13,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 5020 transitions. [2023-09-01 13:50:13,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:50:13,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 5020 transitions. [2023-09-01 13:50:13,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 88.0701754385965) internal successors, (5020), 57 states have internal predecessors, (5020), 0 states have call successors, (0), 0 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 13:50:13,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 352.0) internal successors, (20416), 58 states have internal predecessors, (20416), 0 states have call successors, (0), 0 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 13:50:13,871 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 352.0) internal successors, (20416), 58 states have internal predecessors, (20416), 0 states have call successors, (0), 0 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 13:50:13,871 INFO L175 Difference]: Start difference. First operand has 148 places, 343 transitions, 3632 flow. Second operand 57 states and 5020 transitions. [2023-09-01 13:50:13,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 1216 transitions, 17159 flow [2023-09-01 13:50:14,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 1216 transitions, 15893 flow, removed 591 selfloop flow, removed 12 redundant places. [2023-09-01 13:50:14,485 INFO L231 Difference]: Finished difference. Result has 214 places, 689 transitions, 8375 flow [2023-09-01 13:50:14,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=3321, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=8375, PETRI_PLACES=214, PETRI_TRANSITIONS=689} [2023-09-01 13:50:14,489 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 189 predicate places. [2023-09-01 13:50:14,489 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 689 transitions, 8375 flow [2023-09-01 13:50:14,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 82.94117647058823) internal successors, (2820), 34 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:50:14,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:50:14,497 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:50:14,505 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 13:50:14,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:50:14,702 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:50:14,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:50:14,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1412565654, now seen corresponding path program 3 times [2023-09-01 13:50:14,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:50:14,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899678287] [2023-09-01 13:50:14,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:50:14,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:50:14,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:50:14,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 13:50:14,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:50:14,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899678287] [2023-09-01 13:50:14,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899678287] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:50:14,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899351286] [2023-09-01 13:50:14,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:50:14,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:50:14,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:50:14,827 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 13:50:14,833 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 13:50:14,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 13:50:14,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:50:14,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 13:50:14,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:50:15,062 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 13:50:15,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:50:15,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 13:50:15,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899351286] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:50:15,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:50:15,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-09-01 13:50:15,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50272559] [2023-09-01 13:50:15,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:50:15,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 13:50:15,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:50:15,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 13:50:15,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-09-01 13:50:15,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 352 [2023-09-01 13:50:15,489 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 689 transitions, 8375 flow. Second operand has 15 states, 15 states have (on average 146.26666666666668) internal successors, (2194), 15 states have internal predecessors, (2194), 0 states have call successors, (0), 0 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 13:50:15,489 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:50:15,489 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 352 [2023-09-01 13:50:15,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:50:18,597 INFO L130 PetriNetUnfolder]: 8196/13468 cut-off events. [2023-09-01 13:50:18,597 INFO L131 PetriNetUnfolder]: For 247820/248198 co-relation queries the response was YES. [2023-09-01 13:50:18,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111527 conditions, 13468 events. 8196/13468 cut-off events. For 247820/248198 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 95352 event pairs, 886 based on Foata normal form. 283/13670 useless extension candidates. Maximal degree in co-relation 111433. Up to 4670 conditions per place. [2023-09-01 13:50:18,778 INFO L137 encePairwiseOnDemand]: 345/352 looper letters, 1356 selfloop transitions, 291 changer transitions 0/1673 dead transitions. [2023-09-01 13:50:18,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 1673 transitions, 23751 flow [2023-09-01 13:50:18,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 13:50:18,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 13:50:18,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1518 transitions. [2023-09-01 13:50:18,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2023-09-01 13:50:18,781 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1518 transitions. [2023-09-01 13:50:18,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1518 transitions. [2023-09-01 13:50:18,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:50:18,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1518 transitions. [2023-09-01 13:50:18,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 151.8) internal successors, (1518), 10 states have internal predecessors, (1518), 0 states have call successors, (0), 0 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 13:50:18,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 352.0) internal successors, (3872), 11 states have internal predecessors, (3872), 0 states have call successors, (0), 0 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 13:50:18,788 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 352.0) internal successors, (3872), 11 states have internal predecessors, (3872), 0 states have call successors, (0), 0 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 13:50:18,788 INFO L175 Difference]: Start difference. First operand has 214 places, 689 transitions, 8375 flow. Second operand 10 states and 1518 transitions. [2023-09-01 13:50:18,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 1673 transitions, 23751 flow [2023-09-01 13:50:19,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 1673 transitions, 23166 flow, removed 280 selfloop flow, removed 11 redundant places. [2023-09-01 13:50:19,817 INFO L231 Difference]: Finished difference. Result has 211 places, 857 transitions, 11735 flow [2023-09-01 13:50:19,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=8110, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11735, PETRI_PLACES=211, PETRI_TRANSITIONS=857} [2023-09-01 13:50:19,818 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 186 predicate places. [2023-09-01 13:50:19,818 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 857 transitions, 11735 flow [2023-09-01 13:50:19,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 146.26666666666668) internal successors, (2194), 15 states have internal predecessors, (2194), 0 states have call successors, (0), 0 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 13:50:19,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:50:19,819 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:50:19,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 13:50:20,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:50:20,025 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:50:20,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:50:20,026 INFO L85 PathProgramCache]: Analyzing trace with hash -2087576016, now seen corresponding path program 4 times [2023-09-01 13:50:20,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:50:20,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275436110] [2023-09-01 13:50:20,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:50:20,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:50:20,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:50:20,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:50:20,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:50:20,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275436110] [2023-09-01 13:50:20,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275436110] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:50:20,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712295525] [2023-09-01 13:50:20,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:50:20,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:50:20,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:50:20,217 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:50:20,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 13:50:20,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:50:20,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:50:20,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 13:50:20,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:50:20,344 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:50:20,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:50:20,439 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:50:20,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712295525] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:50:20,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:50:20,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 4] total 9 [2023-09-01 13:50:20,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161495444] [2023-09-01 13:50:20,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:50:20,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 13:50:20,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:50:20,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 13:50:20,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2023-09-01 13:50:20,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 352 [2023-09-01 13:50:20,489 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 857 transitions, 11735 flow. Second operand has 10 states, 10 states have (on average 153.0) internal successors, (1530), 10 states have internal predecessors, (1530), 0 states have call successors, (0), 0 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 13:50:20,489 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:50:20,489 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 352 [2023-09-01 13:50:20,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:50:23,781 INFO L130 PetriNetUnfolder]: 8132/13843 cut-off events. [2023-09-01 13:50:23,781 INFO L131 PetriNetUnfolder]: For 305625/305625 co-relation queries the response was YES. [2023-09-01 13:50:23,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120985 conditions, 13843 events. 8132/13843 cut-off events. For 305625/305625 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 100297 event pairs, 1010 based on Foata normal form. 594/14437 useless extension candidates. Maximal degree in co-relation 118446. Up to 4517 conditions per place. [2023-09-01 13:50:23,946 INFO L137 encePairwiseOnDemand]: 346/352 looper letters, 730 selfloop transitions, 172 changer transitions 83/985 dead transitions. [2023-09-01 13:50:23,946 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 985 transitions, 15496 flow [2023-09-01 13:50:23,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 13:50:23,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 13:50:23,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1114 transitions. [2023-09-01 13:50:23,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45211038961038963 [2023-09-01 13:50:23,949 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1114 transitions. [2023-09-01 13:50:23,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1114 transitions. [2023-09-01 13:50:23,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:50:23,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1114 transitions. [2023-09-01 13:50:23,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 159.14285714285714) internal successors, (1114), 7 states have internal predecessors, (1114), 0 states have call successors, (0), 0 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 13:50:23,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 352.0) internal successors, (2816), 8 states have internal predecessors, (2816), 0 states have call successors, (0), 0 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 13:50:23,954 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 352.0) internal successors, (2816), 8 states have internal predecessors, (2816), 0 states have call successors, (0), 0 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 13:50:23,954 INFO L175 Difference]: Start difference. First operand has 211 places, 857 transitions, 11735 flow. Second operand 7 states and 1114 transitions. [2023-09-01 13:50:23,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 985 transitions, 15496 flow [2023-09-01 13:50:25,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 985 transitions, 15093 flow, removed 136 selfloop flow, removed 9 redundant places. [2023-09-01 13:50:25,516 INFO L231 Difference]: Finished difference. Result has 205 places, 719 transitions, 10406 flow [2023-09-01 13:50:25,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=9028, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10406, PETRI_PLACES=205, PETRI_TRANSITIONS=719} [2023-09-01 13:50:25,517 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 180 predicate places. [2023-09-01 13:50:25,517 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 719 transitions, 10406 flow [2023-09-01 13:50:25,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 153.0) internal successors, (1530), 10 states have internal predecessors, (1530), 0 states have call successors, (0), 0 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 13:50:25,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:50:25,518 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:50:25,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 13:50:25,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:50:25,727 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:50:25,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:50:25,728 INFO L85 PathProgramCache]: Analyzing trace with hash 377650720, now seen corresponding path program 5 times [2023-09-01 13:50:25,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:50:25,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715519716] [2023-09-01 13:50:25,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:50:25,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:50:25,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:50:26,940 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:50:26,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:50:26,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715519716] [2023-09-01 13:50:26,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715519716] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:50:26,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586921522] [2023-09-01 13:50:26,940 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:50:26,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:50:26,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:50:26,945 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:50:26,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 13:50:27,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 13:50:27,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:50:27,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 54 conjunts are in the unsatisfiable core [2023-09-01 13:50:27,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:50:27,590 INFO L321 Elim1Store]: treesize reduction 19, result has 60.4 percent of original size [2023-09-01 13:50:27,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 40 treesize of output 38 [2023-09-01 13:50:27,777 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:50:27,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:50:28,133 INFO L321 Elim1Store]: treesize reduction 34, result has 60.0 percent of original size [2023-09-01 13:50:28,133 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 74 treesize of output 76 [2023-09-01 13:50:28,494 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:50:28,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586921522] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:50:28,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:50:28,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 37 [2023-09-01 13:50:28,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401670083] [2023-09-01 13:50:28,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:50:28,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-09-01 13:50:28,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:50:28,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-09-01 13:50:28,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2023-09-01 13:50:30,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 352 [2023-09-01 13:50:30,302 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 719 transitions, 10406 flow. Second operand has 39 states, 39 states have (on average 111.92307692307692) internal successors, (4365), 39 states have internal predecessors, (4365), 0 states have call successors, (0), 0 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 13:50:30,303 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:50:30,303 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 352 [2023-09-01 13:50:30,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:50:36,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 13:50:44,658 INFO L130 PetriNetUnfolder]: 14209/25067 cut-off events. [2023-09-01 13:50:44,658 INFO L131 PetriNetUnfolder]: For 498437/498437 co-relation queries the response was YES. [2023-09-01 13:50:44,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221018 conditions, 25067 events. 14209/25067 cut-off events. For 498437/498437 co-relation queries the response was YES. Maximal size of possible extension queue 1105. Compared 207146 event pairs, 157 based on Foata normal form. 42/25109 useless extension candidates. Maximal degree in co-relation 218651. Up to 8140 conditions per place. [2023-09-01 13:50:45,017 INFO L137 encePairwiseOnDemand]: 334/352 looper letters, 1088 selfloop transitions, 1037 changer transitions 266/2391 dead transitions. [2023-09-01 13:50:45,017 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 2391 transitions, 42407 flow [2023-09-01 13:50:45,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-09-01 13:50:45,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2023-09-01 13:50:45,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 10091 transitions. [2023-09-01 13:50:45,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3295128004179728 [2023-09-01 13:50:45,030 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 10091 transitions. [2023-09-01 13:50:45,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 10091 transitions. [2023-09-01 13:50:45,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:50:45,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 10091 transitions. [2023-09-01 13:50:45,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 115.98850574712644) internal successors, (10091), 87 states have internal predecessors, (10091), 0 states have call successors, (0), 0 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 13:50:45,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 352.0) internal successors, (30976), 88 states have internal predecessors, (30976), 0 states have call successors, (0), 0 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 13:50:45,198 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 352.0) internal successors, (30976), 88 states have internal predecessors, (30976), 0 states have call successors, (0), 0 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 13:50:45,198 INFO L175 Difference]: Start difference. First operand has 205 places, 719 transitions, 10406 flow. Second operand 87 states and 10091 transitions. [2023-09-01 13:50:45,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 2391 transitions, 42407 flow [2023-09-01 13:50:48,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 2391 transitions, 41838 flow, removed 259 selfloop flow, removed 2 redundant places. [2023-09-01 13:50:48,742 INFO L231 Difference]: Finished difference. Result has 325 places, 1438 transitions, 24735 flow [2023-09-01 13:50:48,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=10297, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=24735, PETRI_PLACES=325, PETRI_TRANSITIONS=1438} [2023-09-01 13:50:48,743 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 300 predicate places. [2023-09-01 13:50:48,743 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 1438 transitions, 24735 flow [2023-09-01 13:50:48,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 111.92307692307692) internal successors, (4365), 39 states have internal predecessors, (4365), 0 states have call successors, (0), 0 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 13:50:48,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:50:48,744 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:50:48,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 13:50:48,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:50:48,945 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:50:48,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:50:48,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1445197890, now seen corresponding path program 6 times [2023-09-01 13:50:48,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:50:48,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719048668] [2023-09-01 13:50:48,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:50:48,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:50:49,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:50:50,457 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:50:50,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:50:50,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719048668] [2023-09-01 13:50:50,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719048668] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:50:50,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80285645] [2023-09-01 13:50:50,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:50:50,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:50:50,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:50:50,461 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:50:50,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 13:50:50,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 13:50:50,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:50:50,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 43 conjunts are in the unsatisfiable core [2023-09-01 13:50:50,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:50:50,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:50:50,747 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 13:50:50,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:50:50,824 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 13:50:50,989 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-09-01 13:50:50,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 34 treesize of output 10 [2023-09-01 13:50:51,036 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:50:51,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:50:55,429 WARN L839 $PredicateComparison]: unable to prove that (or (let ((.cse1 (+ c_~A~0.offset (* c_~i~0 4))) (.cse2 (* c_~end~0 4))) (and (or (not (= (mod c_~ok~0 256) 0)) (forall ((v_ArrVal_405 (Array Int Int)) (~queue~0.base Int) (~queue~0.offset Int)) (not (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_405))) (= (select (select .cse0 c_~A~0.base) .cse1) (select (select .cse0 ~queue~0.base) (+ .cse2 ~queue~0.offset))))))) (forall ((v_ArrVal_405 (Array Int Int)) (~queue~0.base Int) (~queue~0.offset Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_405))) (let ((.cse3 (select .cse4 ~queue~0.base))) (or (< (select .cse3 (+ (* c_~start~0 4) ~queue~0.offset)) (+ c_~v_old~0 1)) (not (= (select (select .cse4 c_~A~0.base) .cse1) (select .cse3 (+ .cse2 ~queue~0.offset)))))))))) (and (<= c_~N~0 c_~i~0) (<= c_~end~0 c_~start~0))) is different from false [2023-09-01 13:50:55,450 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset (* c_~i~0 4))) (.cse2 (* c_~end~0 4))) (and (or (not (= (mod c_~ok~0 256) 0)) (forall ((v_ArrVal_405 (Array Int Int)) (~queue~0.base Int) (~queue~0.offset Int)) (not (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_405))) (= (select (select .cse0 c_~A~0.base) .cse1) (select (select .cse0 ~queue~0.base) (+ .cse2 ~queue~0.offset))))))) (forall ((v_ArrVal_405 (Array Int Int)) (~queue~0.base Int) (~queue~0.offset Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_405))) (let ((.cse3 (select .cse4 ~queue~0.base))) (or (< (select .cse3 (+ (* c_~start~0 4) ~queue~0.offset)) (+ c_~v_old~0 1)) (not (= (select (select .cse4 c_~A~0.base) .cse1) (select .cse3 (+ .cse2 ~queue~0.offset)))))))))) is different from false [2023-09-01 13:50:55,544 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:50:55,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1886 treesize of output 1758 [2023-09-01 13:50:55,631 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:50:55,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 792 treesize of output 771 [2023-09-01 13:50:55,684 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:50:55,684 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 690 treesize of output 623 [2023-09-01 13:50:55,722 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:50:55,723 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 582 treesize of output 503 [2023-09-01 13:51:23,641 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 1 not checked. [2023-09-01 13:51:23,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80285645] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:51:23,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:51:23,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 32 [2023-09-01 13:51:23,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867495198] [2023-09-01 13:51:23,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:51:23,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-09-01 13:51:23,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:51:23,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-09-01 13:51:23,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=831, Unknown=2, NotChecked=122, Total=1122 [2023-09-01 13:51:23,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 352 [2023-09-01 13:51:23,647 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 1438 transitions, 24735 flow. Second operand has 34 states, 34 states have (on average 82.11764705882354) internal successors, (2792), 34 states have internal predecessors, (2792), 0 states have call successors, (0), 0 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 13:51:23,647 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:51:23,647 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 352 [2023-09-01 13:51:23,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:51:32,325 WARN L222 SmtUtils]: Spent 5.89s on a formula simplification. DAG size of input: 94 DAG size of output: 69 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:51:37,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:51:39,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:52:07,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:52:09,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:52:14,477 INFO L130 PetriNetUnfolder]: 15876/27265 cut-off events. [2023-09-01 13:52:14,477 INFO L131 PetriNetUnfolder]: For 886682/886682 co-relation queries the response was YES. [2023-09-01 13:52:14,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287108 conditions, 27265 events. 15876/27265 cut-off events. For 886682/886682 co-relation queries the response was YES. Maximal size of possible extension queue 1088. Compared 217944 event pairs, 1284 based on Foata normal form. 14/27279 useless extension candidates. Maximal degree in co-relation 286192. Up to 9095 conditions per place. [2023-09-01 13:52:14,943 INFO L137 encePairwiseOnDemand]: 335/352 looper letters, 1261 selfloop transitions, 814 changer transitions 97/2172 dead transitions. [2023-09-01 13:52:14,943 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 2172 transitions, 43464 flow [2023-09-01 13:52:14,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-09-01 13:52:14,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-09-01 13:52:14,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 4100 transitions. [2023-09-01 13:52:14,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24266098484848486 [2023-09-01 13:52:14,952 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 4100 transitions. [2023-09-01 13:52:14,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 4100 transitions. [2023-09-01 13:52:14,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:52:14,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 4100 transitions. [2023-09-01 13:52:14,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 85.41666666666667) internal successors, (4100), 48 states have internal predecessors, (4100), 0 states have call successors, (0), 0 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 13:52:14,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 352.0) internal successors, (17248), 49 states have internal predecessors, (17248), 0 states have call successors, (0), 0 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 13:52:14,982 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 352.0) internal successors, (17248), 49 states have internal predecessors, (17248), 0 states have call successors, (0), 0 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 13:52:14,982 INFO L175 Difference]: Start difference. First operand has 325 places, 1438 transitions, 24735 flow. Second operand 48 states and 4100 transitions. [2023-09-01 13:52:14,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 2172 transitions, 43464 flow [2023-09-01 13:52:26,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 2172 transitions, 39737 flow, removed 1830 selfloop flow, removed 16 redundant places. [2023-09-01 13:52:26,502 INFO L231 Difference]: Finished difference. Result has 361 places, 1742 transitions, 30509 flow [2023-09-01 13:52:26,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=22812, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=528, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=773, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=30509, PETRI_PLACES=361, PETRI_TRANSITIONS=1742} [2023-09-01 13:52:26,503 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 336 predicate places. [2023-09-01 13:52:26,503 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 1742 transitions, 30509 flow [2023-09-01 13:52:26,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 82.11764705882354) internal successors, (2792), 34 states have internal predecessors, (2792), 0 states have call successors, (0), 0 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 13:52:26,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:52:26,504 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:52:26,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 13:52:26,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-09-01 13:52:26,710 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:52:26,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:52:26,711 INFO L85 PathProgramCache]: Analyzing trace with hash 2087366540, now seen corresponding path program 7 times [2023-09-01 13:52:26,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:52:26,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566520617] [2023-09-01 13:52:26,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:52:26,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:52:26,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:52:28,094 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:52:28,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:52:28,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566520617] [2023-09-01 13:52:28,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566520617] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:52:28,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909220717] [2023-09-01 13:52:28,095 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:52:28,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:52:28,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:52:28,095 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:52:28,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 13:52:28,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:52:28,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 42 conjunts are in the unsatisfiable core [2023-09-01 13:52:28,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:52:28,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:52:28,513 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-09-01 13:52:28,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 44 [2023-09-01 13:52:28,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-09-01 13:52:28,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-09-01 13:52:28,654 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:52:28,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:52:28,929 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:52:28,930 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 94 treesize of output 135 [2023-09-01 13:52:28,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2023-09-01 13:52:29,145 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-09-01 13:52:29,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909220717] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:52:29,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:52:29,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 9] total 34 [2023-09-01 13:52:29,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654420873] [2023-09-01 13:52:29,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:52:29,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-09-01 13:52:29,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:52:29,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-09-01 13:52:29,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1070, Unknown=0, NotChecked=0, Total=1260 [2023-09-01 13:52:31,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 352 [2023-09-01 13:52:31,808 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 1742 transitions, 30509 flow. Second operand has 36 states, 36 states have (on average 113.0) internal successors, (4068), 36 states have internal predecessors, (4068), 0 states have call successors, (0), 0 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 13:52:31,808 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:52:31,809 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 352 [2023-09-01 13:52:31,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:52:45,669 INFO L130 PetriNetUnfolder]: 17941/30757 cut-off events. [2023-09-01 13:52:45,669 INFO L131 PetriNetUnfolder]: For 932432/932432 co-relation queries the response was YES. [2023-09-01 13:52:46,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320708 conditions, 30757 events. 17941/30757 cut-off events. For 932432/932432 co-relation queries the response was YES. Maximal size of possible extension queue 1220. Compared 249833 event pairs, 545 based on Foata normal form. 14/30771 useless extension candidates. Maximal degree in co-relation 320561. Up to 10841 conditions per place. [2023-09-01 13:52:46,308 INFO L137 encePairwiseOnDemand]: 338/352 looper letters, 1235 selfloop transitions, 937 changer transitions 97/2269 dead transitions. [2023-09-01 13:52:46,309 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 2269 transitions, 45162 flow [2023-09-01 13:52:46,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 13:52:46,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 13:52:46,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2000 transitions. [2023-09-01 13:52:46,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3342245989304813 [2023-09-01 13:52:46,313 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2000 transitions. [2023-09-01 13:52:46,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2000 transitions. [2023-09-01 13:52:46,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:52:46,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2000 transitions. [2023-09-01 13:52:46,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 117.6470588235294) internal successors, (2000), 17 states have internal predecessors, (2000), 0 states have call successors, (0), 0 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 13:52:46,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 352.0) internal successors, (6336), 18 states have internal predecessors, (6336), 0 states have call successors, (0), 0 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 13:52:46,321 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 352.0) internal successors, (6336), 18 states have internal predecessors, (6336), 0 states have call successors, (0), 0 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 13:52:46,321 INFO L175 Difference]: Start difference. First operand has 361 places, 1742 transitions, 30509 flow. Second operand 17 states and 2000 transitions. [2023-09-01 13:52:46,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 2269 transitions, 45162 flow [2023-09-01 13:52:59,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 2269 transitions, 44820 flow, removed 149 selfloop flow, removed 13 redundant places. [2023-09-01 13:52:59,040 INFO L231 Difference]: Finished difference. Result has 368 places, 1865 transitions, 35824 flow [2023-09-01 13:52:59,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=30227, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=804, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=854, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=35824, PETRI_PLACES=368, PETRI_TRANSITIONS=1865} [2023-09-01 13:52:59,043 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 343 predicate places. [2023-09-01 13:52:59,043 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 1865 transitions, 35824 flow [2023-09-01 13:52:59,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 113.0) internal successors, (4068), 36 states have internal predecessors, (4068), 0 states have call successors, (0), 0 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 13:52:59,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:52:59,044 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:52:59,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 13:52:59,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-09-01 13:52:59,249 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:52:59,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:52:59,250 INFO L85 PathProgramCache]: Analyzing trace with hash -517867998, now seen corresponding path program 8 times [2023-09-01 13:52:59,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:52:59,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748492430] [2023-09-01 13:52:59,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:52:59,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:52:59,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:53:00,662 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:53:00,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:53:00,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748492430] [2023-09-01 13:53:00,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748492430] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:53:00,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251391093] [2023-09-01 13:53:00,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:53:00,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:53:00,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:53:00,665 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:53:00,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 13:53:00,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:53:00,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:53:00,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 55 conjunts are in the unsatisfiable core [2023-09-01 13:53:00,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:53:01,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 13:53:01,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:53:01,140 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 13:53:01,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:53:01,216 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 13:53:01,430 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-09-01 13:53:01,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 34 treesize of output 10 [2023-09-01 13:53:01,464 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:53:01,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:53:05,767 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_~end~0 4)) (.cse3 (+ c_~A~0.offset (* c_~i~0 4)))) (and (forall ((v_ArrVal_514 (Array Int Int)) (~queue~0.base Int) (~queue~0.offset Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_514))) (let ((.cse0 (select .cse2 ~queue~0.base))) (or (< (select .cse0 (+ (* c_~start~0 4) ~queue~0.offset)) (+ c_~v_old~0 1)) (not (= (select .cse0 (+ .cse1 ~queue~0.offset)) (select (select .cse2 c_~A~0.base) .cse3))))))) (or (forall ((v_ArrVal_514 (Array Int Int)) (~queue~0.base Int) (~queue~0.offset Int)) (not (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_514))) (= (select (select .cse4 ~queue~0.base) (+ .cse1 ~queue~0.offset)) (select (select .cse4 c_~A~0.base) .cse3))))) (not (= (mod c_~ok~0 256) 0))))) is different from false [2023-09-01 13:53:05,832 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_~end~0 4)) (.cse2 (+ (* c_~i~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (or (forall ((v_ArrVal_513 (Array Int Int)) (v_ArrVal_514 (Array Int Int)) (~queue~0.base Int) (~queue~0.offset Int)) (not (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_513) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_514))) (= (select (select .cse0 ~queue~0.base) (+ .cse1 ~queue~0.offset)) (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse2))))) (not (= (mod c_~ok~0 256) 0))) (forall ((v_ArrVal_513 (Array Int Int)) (v_ArrVal_514 (Array Int Int)) (~queue~0.base Int) (~queue~0.offset Int)) (let ((.cse4 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_513) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_514))) (let ((.cse3 (select .cse4 ~queue~0.base))) (or (not (= (select .cse3 (+ .cse1 ~queue~0.offset)) (select (select .cse4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse2))) (< (select .cse3 (+ (* c_~start~0 4) ~queue~0.offset)) (+ (select (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 1)))))))) is different from false [2023-09-01 13:53:05,846 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:53:05,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 45 [2023-09-01 13:53:05,862 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:53:05,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 422 treesize of output 378 [2023-09-01 13:53:05,880 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:53:05,880 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 358 treesize of output 279 [2023-09-01 13:53:05,892 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:53:05,892 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 262 treesize of output 231 [2023-09-01 13:53:06,103 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:53:06,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 99 treesize of output 74 [2023-09-01 13:53:06,114 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:53:06,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 979 treesize of output 951 [2023-09-01 13:53:06,172 INFO L321 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2023-09-01 13:53:06,173 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 667 treesize of output 672 [2023-09-01 13:53:06,228 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:53:06,228 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 569 treesize of output 543 [2023-09-01 13:53:06,267 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:53:06,268 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 586 treesize of output 494 [2023-09-01 13:53:11,932 INFO L321 Elim1Store]: treesize reduction 29, result has 60.3 percent of original size [2023-09-01 13:53:11,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 30 treesize of output 53 [2023-09-01 13:53:11,974 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2023-09-01 13:53:11,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 13 treesize of output 13 [2023-09-01 13:53:12,011 INFO L321 Elim1Store]: treesize reduction 29, result has 60.3 percent of original size [2023-09-01 13:53:12,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 30 treesize of output 53 [2023-09-01 13:53:12,034 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 13:53:12,034 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 13 treesize of output 9 [2023-09-01 13:53:12,047 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2023-09-01 13:53:12,048 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 26 treesize of output 1 [2023-09-01 13:53:12,057 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 13:53:12,057 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 26 treesize of output 1 [2023-09-01 13:53:12,179 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 2 not checked. [2023-09-01 13:53:12,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251391093] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:53:12,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:53:12,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 9] total 34 [2023-09-01 13:53:12,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560889645] [2023-09-01 13:53:12,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:53:12,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-09-01 13:53:12,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:53:12,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-09-01 13:53:12,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=942, Unknown=3, NotChecked=130, Total=1260 [2023-09-01 13:53:12,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 352 [2023-09-01 13:53:12,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 1865 transitions, 35824 flow. Second operand has 36 states, 36 states have (on average 86.05555555555556) internal successors, (3098), 36 states have internal predecessors, (3098), 0 states have call successors, (0), 0 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 13:53:12,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:53:12,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 352 [2023-09-01 13:53:12,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:53:29,563 INFO L130 PetriNetUnfolder]: 19458/32968 cut-off events. [2023-09-01 13:53:29,563 INFO L131 PetriNetUnfolder]: For 1115293/1115293 co-relation queries the response was YES. [2023-09-01 13:53:30,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363080 conditions, 32968 events. 19458/32968 cut-off events. For 1115293/1115293 co-relation queries the response was YES. Maximal size of possible extension queue 1311. Compared 265769 event pairs, 1101 based on Foata normal form. 14/32982 useless extension candidates. Maximal degree in co-relation 362903. Up to 11739 conditions per place. [2023-09-01 13:53:30,510 INFO L137 encePairwiseOnDemand]: 338/352 looper letters, 1324 selfloop transitions, 1041 changer transitions 91/2456 dead transitions. [2023-09-01 13:53:30,510 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 2456 transitions, 51885 flow [2023-09-01 13:53:30,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-09-01 13:53:30,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-09-01 13:53:30,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2526 transitions. [2023-09-01 13:53:30,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2562905844155844 [2023-09-01 13:53:30,514 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2526 transitions. [2023-09-01 13:53:30,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2526 transitions. [2023-09-01 13:53:30,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:53:30,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2526 transitions. [2023-09-01 13:53:30,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 90.21428571428571) internal successors, (2526), 28 states have internal predecessors, (2526), 0 states have call successors, (0), 0 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 13:53:30,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 352.0) internal successors, (10208), 29 states have internal predecessors, (10208), 0 states have call successors, (0), 0 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 13:53:30,527 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 352.0) internal successors, (10208), 29 states have internal predecessors, (10208), 0 states have call successors, (0), 0 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 13:53:30,527 INFO L175 Difference]: Start difference. First operand has 368 places, 1865 transitions, 35824 flow. Second operand 28 states and 2526 transitions. [2023-09-01 13:53:30,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 2456 transitions, 51885 flow [2023-09-01 13:53:46,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 2456 transitions, 51051 flow, removed 243 selfloop flow, removed 12 redundant places. [2023-09-01 13:53:46,609 INFO L231 Difference]: Finished difference. Result has 387 places, 2042 transitions, 42165 flow [2023-09-01 13:53:46,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=35325, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1865, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=852, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=946, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=42165, PETRI_PLACES=387, PETRI_TRANSITIONS=2042} [2023-09-01 13:53:46,610 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 362 predicate places. [2023-09-01 13:53:46,611 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 2042 transitions, 42165 flow [2023-09-01 13:53:46,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 86.05555555555556) internal successors, (3098), 36 states have internal predecessors, (3098), 0 states have call successors, (0), 0 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 13:53:46,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:53:46,611 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:53:46,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-09-01 13:53:46,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-09-01 13:53:46,812 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:53:46,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:53:46,813 INFO L85 PathProgramCache]: Analyzing trace with hash 152669718, now seen corresponding path program 9 times [2023-09-01 13:53:46,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:53:46,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169245329] [2023-09-01 13:53:46,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:53:46,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:53:46,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:53:46,932 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-09-01 13:53:46,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:53:46,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169245329] [2023-09-01 13:53:46,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169245329] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:53:46,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617993808] [2023-09-01 13:53:46,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:53:46,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:53:46,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:53:46,934 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:53:46,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 13:53:47,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 13:53:47,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:53:47,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 13:53:47,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:53:47,243 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:53:47,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:53:47,439 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:53:47,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617993808] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:53:47,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:53:47,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-09-01 13:53:47,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561360456] [2023-09-01 13:53:47,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:53:47,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 13:53:47,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:53:47,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 13:53:47,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-09-01 13:53:47,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 352 [2023-09-01 13:53:47,853 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 2042 transitions, 42165 flow. Second operand has 17 states, 17 states have (on average 140.94117647058823) internal successors, (2396), 17 states have internal predecessors, (2396), 0 states have call successors, (0), 0 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 13:53:47,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:53:47,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 352 [2023-09-01 13:53:47,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:53:59,870 INFO L130 PetriNetUnfolder]: 13429/23620 cut-off events. [2023-09-01 13:53:59,871 INFO L131 PetriNetUnfolder]: For 901820/901890 co-relation queries the response was YES. [2023-09-01 13:54:00,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267114 conditions, 23620 events. 13429/23620 cut-off events. For 901820/901890 co-relation queries the response was YES. Maximal size of possible extension queue 887. Compared 188624 event pairs, 812 based on Foata normal form. 1074/24659 useless extension candidates. Maximal degree in co-relation 266940. Up to 12150 conditions per place. [2023-09-01 13:54:00,339 INFO L137 encePairwiseOnDemand]: 341/352 looper letters, 998 selfloop transitions, 112 changer transitions 1060/2246 dead transitions. [2023-09-01 13:54:00,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 2246 transitions, 48499 flow [2023-09-01 13:54:00,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 13:54:00,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 13:54:00,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3715 transitions. [2023-09-01 13:54:00,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4059222027972028 [2023-09-01 13:54:00,343 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3715 transitions. [2023-09-01 13:54:00,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3715 transitions. [2023-09-01 13:54:00,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:54:00,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3715 transitions. [2023-09-01 13:54:00,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 142.8846153846154) internal successors, (3715), 26 states have internal predecessors, (3715), 0 states have call successors, (0), 0 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 13:54:00,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 352.0) internal successors, (9504), 27 states have internal predecessors, (9504), 0 states have call successors, (0), 0 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 13:54:00,355 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 352.0) internal successors, (9504), 27 states have internal predecessors, (9504), 0 states have call successors, (0), 0 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 13:54:00,355 INFO L175 Difference]: Start difference. First operand has 387 places, 2042 transitions, 42165 flow. Second operand 26 states and 3715 transitions. [2023-09-01 13:54:00,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 2246 transitions, 48499 flow [2023-09-01 13:54:08,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 2246 transitions, 46767 flow, removed 330 selfloop flow, removed 15 redundant places. [2023-09-01 13:54:08,747 INFO L231 Difference]: Finished difference. Result has 397 places, 1038 transitions, 21273 flow [2023-09-01 13:54:08,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=33534, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=21273, PETRI_PLACES=397, PETRI_TRANSITIONS=1038} [2023-09-01 13:54:08,749 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 372 predicate places. [2023-09-01 13:54:08,749 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 1038 transitions, 21273 flow [2023-09-01 13:54:08,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 140.94117647058823) internal successors, (2396), 17 states have internal predecessors, (2396), 0 states have call successors, (0), 0 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 13:54:08,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:54:08,750 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:54:08,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 13:54:08,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 13:54:08,955 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:54:08,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:54:08,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1092451830, now seen corresponding path program 10 times [2023-09-01 13:54:08,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:54:08,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876260388] [2023-09-01 13:54:08,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:54:08,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:54:09,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:54:10,711 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:54:10,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:54:10,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876260388] [2023-09-01 13:54:10,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876260388] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:54:10,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097936585] [2023-09-01 13:54:10,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:54:10,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:54:10,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:54:10,712 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:54:10,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 13:54:10,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:54:10,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:54:10,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 67 conjunts are in the unsatisfiable core [2023-09-01 13:54:10,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:54:10,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:54:10,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:54:10,841 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 13:54:10,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-09-01 13:54:10,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-09-01 13:54:10,986 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:54:10,988 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 11 treesize of output 11 [2023-09-01 13:54:11,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:54:11,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:54:11,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:54:11,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:54:11,897 INFO L321 Elim1Store]: treesize reduction 41, result has 54.9 percent of original size [2023-09-01 13:54:11,898 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 82 treesize of output 65 [2023-09-01 13:54:11,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:54:11,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:54:14,088 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:54:14,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 251 treesize of output 167 [2023-09-01 13:54:14,296 INFO L321 Elim1Store]: treesize reduction 13, result has 93.5 percent of original size [2023-09-01 13:54:14,297 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 7507 treesize of output 7117 [2023-09-01 13:54:14,711 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:54:14,715 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:54:14,784 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:54:14,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 3550 treesize of output 2810 [2023-09-01 13:54:14,882 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:54:14,891 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:54:14,956 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:54:14,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 2650 treesize of output 2360 [2023-09-01 13:54:15,074 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:54:15,084 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:54:15,158 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:54:15,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 2098 treesize of output 2033 Killed by 15