./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product-alt.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --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-bad-dot-product-alt.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 e280ea7002eb926faba3195da50aa743246f3289123bb9a1b445dc9aaf8e8f3d --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 02:13:37,222 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 02:13:37,224 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 02:13:37,263 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 02:13:37,265 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 02:13:37,268 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 02:13:37,270 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 02:13:37,272 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 02:13:37,274 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 02:13:37,279 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 02:13:37,279 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 02:13:37,282 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 02:13:37,282 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 02:13:37,284 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 02:13:37,286 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 02:13:37,291 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 02:13:37,292 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 02:13:37,293 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 02:13:37,296 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 02:13:37,298 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 02:13:37,301 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 02:13:37,310 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 02:13:37,311 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 02:13:37,312 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 02:13:37,319 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 02:13:37,320 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 02:13:37,320 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 02:13:37,321 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 02:13:37,322 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 02:13:37,323 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 02:13:37,323 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 02:13:37,328 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 02:13:37,330 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 02:13:37,331 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 02:13:37,332 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 02:13:37,333 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 02:13:37,333 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 02:13:37,334 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 02:13:37,334 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 02:13:37,335 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 02:13:37,335 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 02:13:37,337 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 02:13:37,366 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 02:13:37,367 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 02:13:37,368 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 02:13:37,368 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 02:13:37,369 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 02:13:37,369 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 02:13:37,369 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 02:13:37,370 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 02:13:37,370 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 02:13:37,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 02:13:37,371 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 02:13:37,371 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 02:13:37,371 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 02:13:37,371 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 02:13:37,372 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 02:13:37,372 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 02:13:37,372 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 02:13:37,372 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 02:13:37,372 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 02:13:37,373 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 02:13:37,373 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 02:13:37,373 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 02:13:37,373 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 02:13:37,374 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 02:13:37,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 02:13:37,374 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 02:13:37,374 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 02:13:37,374 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 02:13:37,375 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 02:13:37,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 02:13:37,375 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 02:13:37,375 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 02:13:37,375 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 02:13:37,376 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 02:13:37,376 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 02:13:37,376 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e280ea7002eb926faba3195da50aa743246f3289123bb9a1b445dc9aaf8e8f3d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 02:13:37,700 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 02:13:37,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 02:13:37,722 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 02:13:37,723 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 02:13:37,723 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 02:13:37,724 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product-alt.wvr.c [2023-08-31 02:13:38,858 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 02:13:39,091 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 02:13:39,091 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-dot-product-alt.wvr.c [2023-08-31 02:13:39,097 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea9537b72/d9cf2cdda8234314ae6a805c9e3b098f/FLAG88fbeae1e [2023-08-31 02:13:39,109 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea9537b72/d9cf2cdda8234314ae6a805c9e3b098f [2023-08-31 02:13:39,111 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 02:13:39,112 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 02:13:39,113 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 02:13:39,114 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 02:13:39,116 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 02:13:39,117 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 02:13:39" (1/1) ... [2023-08-31 02:13:39,118 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4af9071b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:13:39, skipping insertion in model container [2023-08-31 02:13:39,118 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 02:13:39" (1/1) ... [2023-08-31 02:13:39,122 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 02:13:39,139 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 02:13:39,276 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-bad-dot-product-alt.wvr.c[3182,3195] [2023-08-31 02:13:39,285 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 02:13:39,293 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 02:13:39,317 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-bad-dot-product-alt.wvr.c[3182,3195] [2023-08-31 02:13:39,321 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 02:13:39,329 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 02:13:39,329 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 02:13:39,335 INFO L208 MainTranslator]: Completed translation [2023-08-31 02:13:39,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:13:39 WrapperNode [2023-08-31 02:13:39,336 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 02:13:39,337 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 02:13:39,337 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 02:13:39,337 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 02:13:39,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:13:39" (1/1) ... [2023-08-31 02:13:39,352 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:13:39" (1/1) ... [2023-08-31 02:13:39,403 INFO L138 Inliner]: procedures = 28, calls = 74, calls flagged for inlining = 18, calls inlined = 26, statements flattened = 369 [2023-08-31 02:13:39,404 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 02:13:39,404 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 02:13:39,404 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 02:13:39,404 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 02:13:39,417 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:13:39" (1/1) ... [2023-08-31 02:13:39,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:13:39" (1/1) ... [2023-08-31 02:13:39,434 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:13:39" (1/1) ... [2023-08-31 02:13:39,436 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:13:39" (1/1) ... [2023-08-31 02:13:39,446 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:13:39" (1/1) ... [2023-08-31 02:13:39,465 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:13:39" (1/1) ... [2023-08-31 02:13:39,469 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:13:39" (1/1) ... [2023-08-31 02:13:39,474 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:13:39" (1/1) ... [2023-08-31 02:13:39,478 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 02:13:39,482 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 02:13:39,484 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 02:13:39,484 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 02:13:39,485 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:13:39" (1/1) ... [2023-08-31 02:13:39,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 02:13:39,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:13:39,514 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 02:13:39,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 02:13:39,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 02:13:39,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-31 02:13:39,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 02:13:39,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 02:13:39,570 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 02:13:39,570 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-31 02:13:39,570 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 02:13:39,570 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 02:13:39,571 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 02:13:39,571 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 02:13:39,571 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-31 02:13:39,571 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-31 02:13:39,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 02:13:39,571 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 02:13:39,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 02:13:39,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 02:13:39,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 02:13:39,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 02:13:39,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 02:13:39,579 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 02:13:39,744 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 02:13:39,750 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 02:13:40,197 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 02:13:40,352 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 02:13:40,352 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-31 02:13:40,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 02:13:40 BoogieIcfgContainer [2023-08-31 02:13:40,359 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 02:13:40,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 02:13:40,361 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 02:13:40,364 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 02:13:40,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 02:13:39" (1/3) ... [2023-08-31 02:13:40,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48319d61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 02:13:40, skipping insertion in model container [2023-08-31 02:13:40,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:13:39" (2/3) ... [2023-08-31 02:13:40,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48319d61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 02:13:40, skipping insertion in model container [2023-08-31 02:13:40,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 02:13:40" (3/3) ... [2023-08-31 02:13:40,368 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-dot-product-alt.wvr.c [2023-08-31 02:13:40,375 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 02:13:40,384 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 02:13:40,384 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 02:13:40,384 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 02:13:40,491 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 02:13:40,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 305 places, 330 transitions, 684 flow [2023-08-31 02:13:40,662 INFO L130 PetriNetUnfolder]: 35/327 cut-off events. [2023-08-31 02:13:40,662 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 02:13:40,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340 conditions, 327 events. 35/327 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 643 event pairs, 0 based on Foata normal form. 0/291 useless extension candidates. Maximal degree in co-relation 262. Up to 2 conditions per place. [2023-08-31 02:13:40,671 INFO L82 GeneralOperation]: Start removeDead. Operand has 305 places, 330 transitions, 684 flow [2023-08-31 02:13:40,691 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 292 places, 317 transitions, 652 flow [2023-08-31 02:13:40,694 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 02:13:40,704 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 292 places, 317 transitions, 652 flow [2023-08-31 02:13:40,706 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 292 places, 317 transitions, 652 flow [2023-08-31 02:13:40,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 292 places, 317 transitions, 652 flow [2023-08-31 02:13:40,783 INFO L130 PetriNetUnfolder]: 35/317 cut-off events. [2023-08-31 02:13:40,784 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 02:13:40,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330 conditions, 317 events. 35/317 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 642 event pairs, 0 based on Foata normal form. 0/282 useless extension candidates. Maximal degree in co-relation 262. Up to 2 conditions per place. [2023-08-31 02:13:40,796 INFO L119 LiptonReduction]: Number of co-enabled transitions 11934 [2023-08-31 02:13:52,651 INFO L134 LiptonReduction]: Checked pairs total: 13624 [2023-08-31 02:13:52,652 INFO L136 LiptonReduction]: Total number of compositions: 354 [2023-08-31 02:13:52,663 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 02:13:52,668 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;@1c3ceb68, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 02:13:52,668 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-31 02:13:52,677 INFO L130 PetriNetUnfolder]: 11/41 cut-off events. [2023-08-31 02:13:52,677 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 02:13:52,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:13:52,678 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] [2023-08-31 02:13:52,678 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:13:52,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:13:52,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1858210275, now seen corresponding path program 1 times [2023-08-31 02:13:52,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:13:52,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652158165] [2023-08-31 02:13:52,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:13:52,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:13:52,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:13:53,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:13:53,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:13:53,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652158165] [2023-08-31 02:13:53,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652158165] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:13:53,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:13:53,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 02:13:53,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138280163] [2023-08-31 02:13:53,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:13:53,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 02:13:53,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:13:53,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 02:13:53,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 02:13:53,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 684 [2023-08-31 02:13:53,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 42 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 305.3333333333333) internal successors, (916), 3 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:13:53,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:13:53,322 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 684 [2023-08-31 02:13:53,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:13:53,744 INFO L130 PetriNetUnfolder]: 2127/2864 cut-off events. [2023-08-31 02:13:53,744 INFO L131 PetriNetUnfolder]: For 164/164 co-relation queries the response was YES. [2023-08-31 02:13:53,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5942 conditions, 2864 events. 2127/2864 cut-off events. For 164/164 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 12245 event pairs, 407 based on Foata normal form. 1/1923 useless extension candidates. Maximal degree in co-relation 5357. Up to 2091 conditions per place. [2023-08-31 02:13:53,759 INFO L137 encePairwiseOnDemand]: 677/684 looper letters, 58 selfloop transitions, 4 changer transitions 1/66 dead transitions. [2023-08-31 02:13:53,759 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 66 transitions, 291 flow [2023-08-31 02:13:53,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 02:13:53,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 02:13:53,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 965 transitions. [2023-08-31 02:13:53,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702729044834308 [2023-08-31 02:13:53,774 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 965 transitions. [2023-08-31 02:13:53,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 965 transitions. [2023-08-31 02:13:53,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:13:53,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 965 transitions. [2023-08-31 02:13:53,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 321.6666666666667) internal successors, (965), 3 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:13:53,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 684.0) internal successors, (2736), 4 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:13:53,792 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 684.0) internal successors, (2736), 4 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:13:53,794 INFO L175 Difference]: Start difference. First operand has 41 places, 42 transitions, 102 flow. Second operand 3 states and 965 transitions. [2023-08-31 02:13:53,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 66 transitions, 291 flow [2023-08-31 02:13:53,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 66 transitions, 269 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-31 02:13:53,802 INFO L231 Difference]: Finished difference. Result has 38 places, 43 transitions, 112 flow [2023-08-31 02:13:53,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=684, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=38, PETRI_TRANSITIONS=43} [2023-08-31 02:13:53,806 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -3 predicate places. [2023-08-31 02:13:53,806 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 43 transitions, 112 flow [2023-08-31 02:13:53,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 305.3333333333333) internal successors, (916), 3 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:13:53,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:13:53,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:13:53,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 02:13:53,808 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:13:53,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:13:53,809 INFO L85 PathProgramCache]: Analyzing trace with hash -502966875, now seen corresponding path program 1 times [2023-08-31 02:13:53,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:13:53,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640966756] [2023-08-31 02:13:53,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:13:53,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:13:53,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:13:53,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:13:53,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:13:53,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640966756] [2023-08-31 02:13:53,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640966756] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:13:53,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:13:53,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 02:13:53,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693920480] [2023-08-31 02:13:53,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:13:53,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 02:13:53,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:13:53,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 02:13:53,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 02:13:53,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 295 out of 684 [2023-08-31 02:13:53,950 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 43 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:13:53,951 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:13:53,951 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 295 of 684 [2023-08-31 02:13:53,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:13:54,591 INFO L130 PetriNetUnfolder]: 3563/4923 cut-off events. [2023-08-31 02:13:54,591 INFO L131 PetriNetUnfolder]: For 551/551 co-relation queries the response was YES. [2023-08-31 02:13:54,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10913 conditions, 4923 events. 3563/4923 cut-off events. For 551/551 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 24879 event pairs, 2128 based on Foata normal form. 189/3992 useless extension candidates. Maximal degree in co-relation 3124. Up to 2836 conditions per place. [2023-08-31 02:13:54,617 INFO L137 encePairwiseOnDemand]: 679/684 looper letters, 69 selfloop transitions, 4 changer transitions 0/76 dead transitions. [2023-08-31 02:13:54,618 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 76 transitions, 342 flow [2023-08-31 02:13:54,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:13:54,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:13:54,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1544 transitions. [2023-08-31 02:13:54,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45146198830409356 [2023-08-31 02:13:54,622 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1544 transitions. [2023-08-31 02:13:54,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1544 transitions. [2023-08-31 02:13:54,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:13:54,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1544 transitions. [2023-08-31 02:13:54,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 308.8) internal successors, (1544), 5 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:13:54,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 684.0) internal successors, (4104), 6 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:13:54,633 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 684.0) internal successors, (4104), 6 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:13:54,634 INFO L175 Difference]: Start difference. First operand has 38 places, 43 transitions, 112 flow. Second operand 5 states and 1544 transitions. [2023-08-31 02:13:54,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 76 transitions, 342 flow [2023-08-31 02:13:54,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 76 transitions, 336 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 02:13:54,637 INFO L231 Difference]: Finished difference. Result has 43 places, 45 transitions, 132 flow [2023-08-31 02:13:54,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=684, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=132, PETRI_PLACES=43, PETRI_TRANSITIONS=45} [2023-08-31 02:13:54,638 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2023-08-31 02:13:54,638 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 45 transitions, 132 flow [2023-08-31 02:13:54,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:13:54,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:13:54,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:13:54,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 02:13:54,640 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:13:54,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:13:54,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1862203380, now seen corresponding path program 1 times [2023-08-31 02:13:54,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:13:54,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388592344] [2023-08-31 02:13:54,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:13:54,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:13:54,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:13:54,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:13:54,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:13:54,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388592344] [2023-08-31 02:13:54,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388592344] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:13:54,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:13:54,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 02:13:54,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268158480] [2023-08-31 02:13:54,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:13:54,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 02:13:54,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:13:54,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 02:13:54,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 02:13:54,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 287 out of 684 [2023-08-31 02:13:54,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 45 transitions, 132 flow. Second operand has 4 states, 4 states have (on average 292.5) internal successors, (1170), 4 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:13:54,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:13:54,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 287 of 684 [2023-08-31 02:13:54,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:13:56,006 INFO L130 PetriNetUnfolder]: 6439/9045 cut-off events. [2023-08-31 02:13:56,007 INFO L131 PetriNetUnfolder]: For 2107/2107 co-relation queries the response was YES. [2023-08-31 02:13:56,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19723 conditions, 9045 events. 6439/9045 cut-off events. For 2107/2107 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 51137 event pairs, 4038 based on Foata normal form. 396/7330 useless extension candidates. Maximal degree in co-relation 12639. Up to 4867 conditions per place. [2023-08-31 02:13:56,055 INFO L137 encePairwiseOnDemand]: 675/684 looper letters, 103 selfloop transitions, 12 changer transitions 0/118 dead transitions. [2023-08-31 02:13:56,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 118 transitions, 556 flow [2023-08-31 02:13:56,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:13:56,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:13:56,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1542 transitions. [2023-08-31 02:13:56,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45087719298245615 [2023-08-31 02:13:56,060 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1542 transitions. [2023-08-31 02:13:56,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1542 transitions. [2023-08-31 02:13:56,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:13:56,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1542 transitions. [2023-08-31 02:13:56,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 308.4) internal successors, (1542), 5 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:13:56,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 684.0) internal successors, (4104), 6 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:13:56,072 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 684.0) internal successors, (4104), 6 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:13:56,072 INFO L175 Difference]: Start difference. First operand has 43 places, 45 transitions, 132 flow. Second operand 5 states and 1542 transitions. [2023-08-31 02:13:56,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 118 transitions, 556 flow [2023-08-31 02:13:56,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 118 transitions, 550 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 02:13:56,076 INFO L231 Difference]: Finished difference. Result has 48 places, 55 transitions, 221 flow [2023-08-31 02:13:56,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=684, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=221, PETRI_PLACES=48, PETRI_TRANSITIONS=55} [2023-08-31 02:13:56,077 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 7 predicate places. [2023-08-31 02:13:56,077 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 55 transitions, 221 flow [2023-08-31 02:13:56,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 292.5) internal successors, (1170), 4 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:13:56,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:13:56,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:13:56,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 02:13:56,079 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:13:56,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:13:56,080 INFO L85 PathProgramCache]: Analyzing trace with hash 495709722, now seen corresponding path program 1 times [2023-08-31 02:13:56,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:13:56,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224874602] [2023-08-31 02:13:56,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:13:56,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:13:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:13:56,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:13:56,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:13:56,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224874602] [2023-08-31 02:13:56,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224874602] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:13:56,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:13:56,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 02:13:56,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830791492] [2023-08-31 02:13:56,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:13:56,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 02:13:56,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:13:56,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 02:13:56,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 02:13:56,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 684 [2023-08-31 02:13:56,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 55 transitions, 221 flow. Second operand has 4 states, 4 states have (on average 296.75) internal successors, (1187), 4 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:13:56,179 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:13:56,179 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 684 [2023-08-31 02:13:56,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:13:57,526 INFO L130 PetriNetUnfolder]: 7731/10993 cut-off events. [2023-08-31 02:13:57,528 INFO L131 PetriNetUnfolder]: For 3747/3747 co-relation queries the response was YES. [2023-08-31 02:13:57,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24850 conditions, 10993 events. 7731/10993 cut-off events. For 3747/3747 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 65257 event pairs, 4038 based on Foata normal form. 342/8907 useless extension candidates. Maximal degree in co-relation 15406. Up to 8436 conditions per place. [2023-08-31 02:13:57,578 INFO L137 encePairwiseOnDemand]: 681/684 looper letters, 51 selfloop transitions, 0 changer transitions 34/88 dead transitions. [2023-08-31 02:13:57,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 88 transitions, 501 flow [2023-08-31 02:13:57,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 02:13:57,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 02:13:57,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1231 transitions. [2023-08-31 02:13:57,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44992690058479534 [2023-08-31 02:13:57,585 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1231 transitions. [2023-08-31 02:13:57,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1231 transitions. [2023-08-31 02:13:57,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:13:57,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1231 transitions. [2023-08-31 02:13:57,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 307.75) internal successors, (1231), 4 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:13:57,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 684.0) internal successors, (3420), 5 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:13:57,595 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 684.0) internal successors, (3420), 5 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:13:57,595 INFO L175 Difference]: Start difference. First operand has 48 places, 55 transitions, 221 flow. Second operand 4 states and 1231 transitions. [2023-08-31 02:13:57,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 88 transitions, 501 flow [2023-08-31 02:13:57,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 88 transitions, 499 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-31 02:13:57,607 INFO L231 Difference]: Finished difference. Result has 53 places, 54 transitions, 221 flow [2023-08-31 02:13:57,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=684, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=221, PETRI_PLACES=53, PETRI_TRANSITIONS=54} [2023-08-31 02:13:57,608 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2023-08-31 02:13:57,608 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 54 transitions, 221 flow [2023-08-31 02:13:57,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 296.75) internal successors, (1187), 4 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:13:57,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:13:57,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:13:57,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 02:13:57,610 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:13:57,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:13:57,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1794749022, now seen corresponding path program 1 times [2023-08-31 02:13:57,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:13:57,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188531428] [2023-08-31 02:13:57,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:13:57,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:13:57,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:13:57,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:13:57,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:13:57,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188531428] [2023-08-31 02:13:57,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188531428] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:13:57,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:13:57,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 02:13:57,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910983527] [2023-08-31 02:13:57,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:13:57,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 02:13:57,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:13:57,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 02:13:57,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 02:13:57,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 684 [2023-08-31 02:13:57,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 54 transitions, 221 flow. Second operand has 4 states, 4 states have (on average 290.75) internal successors, (1163), 4 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:13:57,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:13:57,928 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 684 [2023-08-31 02:13:57,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:13:58,788 INFO L130 PetriNetUnfolder]: 5945/8535 cut-off events. [2023-08-31 02:13:58,789 INFO L131 PetriNetUnfolder]: For 3368/3368 co-relation queries the response was YES. [2023-08-31 02:13:58,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20117 conditions, 8535 events. 5945/8535 cut-off events. For 3368/3368 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 49510 event pairs, 4038 based on Foata normal form. 4/6917 useless extension candidates. Maximal degree in co-relation 20105. Up to 8432 conditions per place. [2023-08-31 02:13:58,833 INFO L137 encePairwiseOnDemand]: 678/684 looper letters, 45 selfloop transitions, 4 changer transitions 16/68 dead transitions. [2023-08-31 02:13:58,833 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 68 transitions, 433 flow [2023-08-31 02:13:58,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 02:13:58,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 02:13:58,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1186 transitions. [2023-08-31 02:13:58,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4334795321637427 [2023-08-31 02:13:58,837 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1186 transitions. [2023-08-31 02:13:58,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1186 transitions. [2023-08-31 02:13:58,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:13:58,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1186 transitions. [2023-08-31 02:13:58,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 296.5) internal successors, (1186), 4 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:13:58,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 684.0) internal successors, (3420), 5 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:13:58,848 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 684.0) internal successors, (3420), 5 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:13:58,848 INFO L175 Difference]: Start difference. First operand has 53 places, 54 transitions, 221 flow. Second operand 4 states and 1186 transitions. [2023-08-31 02:13:58,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 68 transitions, 433 flow [2023-08-31 02:13:58,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 68 transitions, 429 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-31 02:13:58,875 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 218 flow [2023-08-31 02:13:58,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=684, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=218, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2023-08-31 02:13:58,877 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2023-08-31 02:13:58,878 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 218 flow [2023-08-31 02:13:58,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 290.75) internal successors, (1163), 4 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:13:58,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:13:58,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:13:58,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 02:13:58,879 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:13:58,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:13:58,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1786239941, now seen corresponding path program 1 times [2023-08-31 02:13:58,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:13:58,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327426139] [2023-08-31 02:13:58,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:13:58,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:13:58,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:13:59,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:13:59,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:13:59,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327426139] [2023-08-31 02:13:59,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327426139] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:13:59,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023562] [2023-08-31 02:13:59,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:13:59,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:13:59,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:13:59,059 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:13:59,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 02:13:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:13:59,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-31 02:13:59,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:13:59,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:13:59,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 02:13:59,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023562] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:13:59,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 02:13:59,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2023-08-31 02:13:59,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776693719] [2023-08-31 02:13:59,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:13:59,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 02:13:59,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:13:59,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 02:13:59,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-08-31 02:13:59,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 684 [2023-08-31 02:13:59,344 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 218 flow. Second operand has 5 states, 5 states have (on average 295.0) internal successors, (1475), 5 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:13:59,344 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:13:59,345 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 684 [2023-08-31 02:13:59,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:14:00,611 INFO L130 PetriNetUnfolder]: 7924/11566 cut-off events. [2023-08-31 02:14:00,611 INFO L131 PetriNetUnfolder]: For 4383/4383 co-relation queries the response was YES. [2023-08-31 02:14:00,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26335 conditions, 11566 events. 7924/11566 cut-off events. For 4383/4383 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 72409 event pairs, 4038 based on Foata normal form. 360/10081 useless extension candidates. Maximal degree in co-relation 26323. Up to 7896 conditions per place. [2023-08-31 02:14:00,656 INFO L137 encePairwiseOnDemand]: 680/684 looper letters, 48 selfloop transitions, 0 changer transitions 48/99 dead transitions. [2023-08-31 02:14:00,656 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 99 transitions, 570 flow [2023-08-31 02:14:00,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:14:00,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:14:00,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1528 transitions. [2023-08-31 02:14:00,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44678362573099417 [2023-08-31 02:14:00,661 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1528 transitions. [2023-08-31 02:14:00,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1528 transitions. [2023-08-31 02:14:00,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:14:00,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1528 transitions. [2023-08-31 02:14:00,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 305.6) internal successors, (1528), 5 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:00,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 684.0) internal successors, (4104), 6 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:00,671 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 684.0) internal successors, (4104), 6 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:00,671 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 218 flow. Second operand 5 states and 1528 transitions. [2023-08-31 02:14:00,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 99 transitions, 570 flow [2023-08-31 02:14:00,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 99 transitions, 562 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-31 02:14:00,677 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 216 flow [2023-08-31 02:14:00,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=684, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=216, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2023-08-31 02:14:00,678 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2023-08-31 02:14:00,678 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 216 flow [2023-08-31 02:14:00,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 295.0) internal successors, (1475), 5 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:00,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:14:00,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:14:00,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 02:14:00,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-31 02:14:00,887 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:14:00,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:14:00,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1996153928, now seen corresponding path program 1 times [2023-08-31 02:14:00,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:14:00,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204061958] [2023-08-31 02:14:00,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:14:00,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:14:00,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:14:01,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:14:01,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:14:01,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204061958] [2023-08-31 02:14:01,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204061958] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:14:01,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345397919] [2023-08-31 02:14:01,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:14:01,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:14:01,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:14:01,037 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:14:01,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 02:14:01,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:14:01,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:14:01,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:14:01,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:14:01,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:14:01,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:14:01,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345397919] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 02:14:01,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 02:14:01,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-08-31 02:14:01,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900479447] [2023-08-31 02:14:01,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:14:01,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 02:14:01,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:14:01,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 02:14:01,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-31 02:14:01,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 684 [2023-08-31 02:14:01,407 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 216 flow. Second operand has 5 states, 5 states have (on average 282.2) internal successors, (1411), 5 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:01,408 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:14:01,408 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 684 [2023-08-31 02:14:01,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:14:02,214 INFO L130 PetriNetUnfolder]: 5396/7963 cut-off events. [2023-08-31 02:14:02,215 INFO L131 PetriNetUnfolder]: For 4493/4493 co-relation queries the response was YES. [2023-08-31 02:14:02,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19479 conditions, 7963 events. 5396/7963 cut-off events. For 4493/4493 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 47738 event pairs, 1125 based on Foata normal form. 0/7223 useless extension candidates. Maximal degree in co-relation 19465. Up to 5461 conditions per place. [2023-08-31 02:14:02,247 INFO L137 encePairwiseOnDemand]: 678/684 looper letters, 59 selfloop transitions, 6 changer transitions 0/67 dead transitions. [2023-08-31 02:14:02,247 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 67 transitions, 408 flow [2023-08-31 02:14:02,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:14:02,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:14:02,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1437 transitions. [2023-08-31 02:14:02,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4201754385964912 [2023-08-31 02:14:02,251 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1437 transitions. [2023-08-31 02:14:02,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1437 transitions. [2023-08-31 02:14:02,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:14:02,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1437 transitions. [2023-08-31 02:14:02,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 287.4) internal successors, (1437), 5 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:02,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 684.0) internal successors, (4104), 6 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:02,260 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 684.0) internal successors, (4104), 6 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:02,260 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 216 flow. Second operand 5 states and 1437 transitions. [2023-08-31 02:14:02,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 67 transitions, 408 flow [2023-08-31 02:14:02,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 67 transitions, 390 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-08-31 02:14:02,273 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 233 flow [2023-08-31 02:14:02,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=684, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=233, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2023-08-31 02:14:02,274 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2023-08-31 02:14:02,274 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 233 flow [2023-08-31 02:14:02,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 282.2) internal successors, (1411), 5 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:02,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:14:02,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:14:02,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 02:14:02,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-08-31 02:14:02,481 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:14:02,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:14:02,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1329329946, now seen corresponding path program 1 times [2023-08-31 02:14:02,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:14:02,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652869339] [2023-08-31 02:14:02,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:14:02,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:14:02,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:14:02,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:14:02,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:14:02,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652869339] [2023-08-31 02:14:02,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652869339] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:14:02,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:14:02,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-31 02:14:02,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255392530] [2023-08-31 02:14:02,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:14:02,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 02:14:02,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:14:02,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 02:14:02,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-31 02:14:03,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 684 [2023-08-31 02:14:03,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 233 flow. Second operand has 7 states, 7 states have (on average 277.85714285714283) internal successors, (1945), 7 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:03,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:14:03,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 684 [2023-08-31 02:14:03,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:14:03,955 INFO L130 PetriNetUnfolder]: 6057/9079 cut-off events. [2023-08-31 02:14:03,956 INFO L131 PetriNetUnfolder]: For 5733/5733 co-relation queries the response was YES. [2023-08-31 02:14:03,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22848 conditions, 9079 events. 6057/9079 cut-off events. For 5733/5733 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 55278 event pairs, 4110 based on Foata normal form. 159/8594 useless extension candidates. Maximal degree in co-relation 22834. Up to 6172 conditions per place. [2023-08-31 02:14:04,000 INFO L137 encePairwiseOnDemand]: 674/684 looper letters, 83 selfloop transitions, 9 changer transitions 56/150 dead transitions. [2023-08-31 02:14:04,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 150 transitions, 797 flow [2023-08-31 02:14:04,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 02:14:04,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 02:14:04,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2869 transitions. [2023-08-31 02:14:04,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2023-08-31 02:14:04,008 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2869 transitions. [2023-08-31 02:14:04,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2869 transitions. [2023-08-31 02:14:04,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:14:04,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2869 transitions. [2023-08-31 02:14:04,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 286.9) internal successors, (2869), 10 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:04,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 684.0) internal successors, (7524), 11 states have internal predecessors, (7524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:04,028 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 684.0) internal successors, (7524), 11 states have internal predecessors, (7524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:04,028 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 233 flow. Second operand 10 states and 2869 transitions. [2023-08-31 02:14:04,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 150 transitions, 797 flow [2023-08-31 02:14:04,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 150 transitions, 786 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-31 02:14:04,041 INFO L231 Difference]: Finished difference. Result has 70 places, 56 transitions, 292 flow [2023-08-31 02:14:04,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=684, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=292, PETRI_PLACES=70, PETRI_TRANSITIONS=56} [2023-08-31 02:14:04,042 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 29 predicate places. [2023-08-31 02:14:04,042 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 56 transitions, 292 flow [2023-08-31 02:14:04,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 277.85714285714283) internal successors, (1945), 7 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:04,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:14:04,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:14:04,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 02:14:04,044 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:14:04,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:14:04,044 INFO L85 PathProgramCache]: Analyzing trace with hash 284319270, now seen corresponding path program 2 times [2023-08-31 02:14:04,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:14:04,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648152686] [2023-08-31 02:14:04,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:14:04,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:14:04,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:14:04,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:14:04,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:14:04,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648152686] [2023-08-31 02:14:04,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648152686] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:14:04,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844097791] [2023-08-31 02:14:04,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:14:04,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:14:04,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:14:04,195 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:14:04,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 02:14:04,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:14:04,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:14:04,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 02:14:04,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:14:04,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:14:04,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:14:04,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:14:04,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844097791] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 02:14:04,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 02:14:04,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2023-08-31 02:14:04,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199401279] [2023-08-31 02:14:04,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:14:04,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 02:14:04,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:14:04,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 02:14:04,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-08-31 02:14:04,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 684 [2023-08-31 02:14:04,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 56 transitions, 292 flow. Second operand has 7 states, 7 states have (on average 275.0) internal successors, (1925), 7 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:04,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:14:04,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 684 [2023-08-31 02:14:04,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:14:05,795 INFO L130 PetriNetUnfolder]: 5873/8812 cut-off events. [2023-08-31 02:14:05,795 INFO L131 PetriNetUnfolder]: For 12300/13004 co-relation queries the response was YES. [2023-08-31 02:14:05,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26233 conditions, 8812 events. 5873/8812 cut-off events. For 12300/13004 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 51024 event pairs, 677 based on Foata normal form. 1584/9854 useless extension candidates. Maximal degree in co-relation 26213. Up to 4204 conditions per place. [2023-08-31 02:14:05,828 INFO L137 encePairwiseOnDemand]: 675/684 looper letters, 89 selfloop transitions, 17 changer transitions 17/124 dead transitions. [2023-08-31 02:14:05,829 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 124 transitions, 860 flow [2023-08-31 02:14:05,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 02:14:05,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 02:14:05,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2261 transitions. [2023-08-31 02:14:05,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4131944444444444 [2023-08-31 02:14:05,836 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2261 transitions. [2023-08-31 02:14:05,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2261 transitions. [2023-08-31 02:14:05,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:14:05,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2261 transitions. [2023-08-31 02:14:05,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 282.625) internal successors, (2261), 8 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:05,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 684.0) internal successors, (6156), 9 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:05,852 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 684.0) internal successors, (6156), 9 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:05,852 INFO L175 Difference]: Start difference. First operand has 70 places, 56 transitions, 292 flow. Second operand 8 states and 2261 transitions. [2023-08-31 02:14:05,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 124 transitions, 860 flow [2023-08-31 02:14:05,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 124 transitions, 835 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-08-31 02:14:05,866 INFO L231 Difference]: Finished difference. Result has 71 places, 55 transitions, 324 flow [2023-08-31 02:14:05,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=684, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=324, PETRI_PLACES=71, PETRI_TRANSITIONS=55} [2023-08-31 02:14:05,867 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 30 predicate places. [2023-08-31 02:14:05,867 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 55 transitions, 324 flow [2023-08-31 02:14:05,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 275.0) internal successors, (1925), 7 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:05,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:14:05,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:14:05,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-31 02:14:06,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:14:06,075 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:14:06,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:14:06,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1369385218, now seen corresponding path program 1 times [2023-08-31 02:14:06,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:14:06,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19425366] [2023-08-31 02:14:06,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:14:06,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:14:06,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:14:07,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:14:07,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:14:07,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19425366] [2023-08-31 02:14:07,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19425366] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:14:07,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566749079] [2023-08-31 02:14:07,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:14:07,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:14:07,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:14:07,989 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:14:07,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 02:14:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:14:08,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 92 conjunts are in the unsatisfiable core [2023-08-31 02:14:08,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:14:08,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:14:08,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:14:08,249 INFO L321 Elim1Store]: treesize reduction 63, result has 14.9 percent of original size [2023-08-31 02:14:08,250 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 2 case distinctions, treesize of input 15 treesize of output 21 [2023-08-31 02:14:08,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:14:08,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:14:08,375 INFO L321 Elim1Store]: treesize reduction 88, result has 19.3 percent of original size [2023-08-31 02:14:08,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 27 treesize of output 38 [2023-08-31 02:14:08,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:14:08,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:14:08,533 INFO L321 Elim1Store]: treesize reduction 48, result has 26.2 percent of original size [2023-08-31 02:14:08,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 26 treesize of output 32 [2023-08-31 02:14:08,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 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 [2023-08-31 02:14:08,859 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 [2023-08-31 02:14:09,048 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 [2023-08-31 02:14:09,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:14:09,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2023-08-31 02:14:09,140 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 [2023-08-31 02:14:09,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:14:09,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2023-08-31 02:14:09,823 INFO L321 Elim1Store]: treesize reduction 153, result has 30.8 percent of original size [2023-08-31 02:14:09,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 191 treesize of output 150 [2023-08-31 02:14:09,849 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 02:14:09,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 116 [2023-08-31 02:14:09,866 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 02:14:09,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 84 [2023-08-31 02:14:09,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:14:09,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:14:10,064 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:14:10,064 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 103 treesize of output 96 Killed by 15