/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --traceabstraction.use.on-demand.petri.net.difference true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-min-max-inc.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 20:07:16,486 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 20:07:16,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 20:07:16,507 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 20:07:16,508 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 20:07:16,511 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 20:07:16,514 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 20:07:16,517 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 20:07:16,521 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 20:07:16,524 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 20:07:16,525 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 20:07:16,526 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 20:07:16,527 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 20:07:16,528 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 20:07:16,529 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 20:07:16,531 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 20:07:16,532 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 20:07:16,532 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 20:07:16,534 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 20:07:16,538 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 20:07:16,539 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 20:07:16,540 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 20:07:16,540 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 20:07:16,541 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 20:07:16,546 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 20:07:16,546 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 20:07:16,547 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 20:07:16,548 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 20:07:16,548 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 20:07:16,549 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 20:07:16,549 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 20:07:16,551 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 20:07:16,552 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 20:07:16,552 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 20:07:16,553 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 20:07:16,553 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 20:07:16,553 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 20:07:16,553 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 20:07:16,554 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 20:07:16,554 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 20:07:16,555 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 20:07:16,558 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2022-12-12 20:07:16,588 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 20:07:16,588 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 20:07:16,589 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 20:07:16,589 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 20:07:16,589 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 20:07:16,589 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 20:07:16,589 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 20:07:16,590 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 20:07:16,590 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 20:07:16,590 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 20:07:16,590 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 20:07:16,590 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 20:07:16,590 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 20:07:16,590 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 20:07:16,590 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 20:07:16,591 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 20:07:16,591 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 20:07:16,591 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 20:07:16,591 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 20:07:16,591 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 20:07:16,591 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 20:07:16,591 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 20:07:16,591 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 20:07:16,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 20:07:16,592 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 20:07:16,592 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 20:07:16,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 20:07:16,592 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 20:07:16,592 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 20:07:16,592 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 20:07:16,592 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use on-demand Petri net difference -> true [2022-12-12 20:07:16,844 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 20:07:16,858 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 20:07:16,860 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 20:07:16,861 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 20:07:16,862 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 20:07:16,863 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-min-max-inc.wvr.c [2022-12-12 20:07:17,826 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 20:07:17,999 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 20:07:17,999 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-inc.wvr.c [2022-12-12 20:07:18,025 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40c1f94fe/3cd236b21b4647f8870c507b10410634/FLAGfa3b0552c [2022-12-12 20:07:18,036 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40c1f94fe/3cd236b21b4647f8870c507b10410634 [2022-12-12 20:07:18,037 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 20:07:18,038 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 20:07:18,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 20:07:18,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 20:07:18,043 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 20:07:18,043 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 08:07:18" (1/1) ... [2022-12-12 20:07:18,044 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@649365f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:07:18, skipping insertion in model container [2022-12-12 20:07:18,044 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 08:07:18" (1/1) ... [2022-12-12 20:07:18,049 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 20:07:18,068 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 20:07:18,187 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 20:07:18,188 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 20:07:18,188 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 20:07:18,189 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 20:07:18,191 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 20:07:18,193 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 20:07:18,195 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 20:07:18,196 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 20:07:18,196 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 20:07:18,196 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 20:07:18,197 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 20:07:18,197 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 20:07:18,202 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 20:07:18,204 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 20:07:18,205 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 20:07:18,208 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 20:07:18,216 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-inc.wvr.c[3018,3031] [2022-12-12 20:07:18,226 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 20:07:18,234 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 20:07:18,245 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 20:07:18,247 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 20:07:18,247 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 20:07:18,247 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 20:07:18,248 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 20:07:18,249 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 20:07:18,250 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 20:07:18,250 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 20:07:18,251 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 20:07:18,251 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 20:07:18,252 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 20:07:18,253 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 20:07:18,258 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 20:07:18,259 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 20:07:18,260 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 20:07:18,261 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 20:07:18,270 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-inc.wvr.c[3018,3031] [2022-12-12 20:07:18,274 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 20:07:18,283 INFO L208 MainTranslator]: Completed translation [2022-12-12 20:07:18,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:07:18 WrapperNode [2022-12-12 20:07:18,283 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 20:07:18,286 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 20:07:18,286 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 20:07:18,286 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 20:07:18,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:07:18" (1/1) ... [2022-12-12 20:07:18,296 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:07:18" (1/1) ... [2022-12-12 20:07:18,311 INFO L138 Inliner]: procedures = 26, calls = 63, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 137 [2022-12-12 20:07:18,311 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 20:07:18,312 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 20:07:18,312 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 20:07:18,312 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 20:07:18,317 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:07:18" (1/1) ... [2022-12-12 20:07:18,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:07:18" (1/1) ... [2022-12-12 20:07:18,319 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:07:18" (1/1) ... [2022-12-12 20:07:18,320 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:07:18" (1/1) ... [2022-12-12 20:07:18,332 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:07:18" (1/1) ... [2022-12-12 20:07:18,335 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:07:18" (1/1) ... [2022-12-12 20:07:18,336 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:07:18" (1/1) ... [2022-12-12 20:07:18,337 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:07:18" (1/1) ... [2022-12-12 20:07:18,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 20:07:18,343 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 20:07:18,343 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 20:07:18,343 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 20:07:18,344 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:07:18" (1/1) ... [2022-12-12 20:07:18,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 20:07:18,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:07:18,364 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) [2022-12-12 20:07:18,374 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 [2022-12-12 20:07:18,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 20:07:18,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 20:07:18,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 20:07:18,389 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-12 20:07:18,389 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-12 20:07:18,389 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-12 20:07:18,389 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-12 20:07:18,389 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-12 20:07:18,389 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-12 20:07:18,389 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-12 20:07:18,389 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-12-12 20:07:18,389 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-12-12 20:07:18,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 20:07:18,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-12 20:07:18,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-12 20:07:18,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-12 20:07:18,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 20:07:18,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 20:07:18,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 20:07:18,391 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-12 20:07:18,482 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 20:07:18,483 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 20:07:18,728 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 20:07:18,797 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 20:07:18,797 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-12 20:07:18,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 08:07:18 BoogieIcfgContainer [2022-12-12 20:07:18,799 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 20:07:18,801 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 20:07:18,801 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 20:07:18,803 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 20:07:18,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 08:07:18" (1/3) ... [2022-12-12 20:07:18,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53c6e829 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 08:07:18, skipping insertion in model container [2022-12-12 20:07:18,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:07:18" (2/3) ... [2022-12-12 20:07:18,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53c6e829 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 08:07:18, skipping insertion in model container [2022-12-12 20:07:18,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 08:07:18" (3/3) ... [2022-12-12 20:07:18,809 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-inc.wvr.c [2022-12-12 20:07:18,821 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 20:07:18,821 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 20:07:18,821 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 20:07:18,897 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-12 20:07:18,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 160 transitions, 352 flow [2022-12-12 20:07:19,004 INFO L130 PetriNetUnfolder]: 12/156 cut-off events. [2022-12-12 20:07:19,004 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-12 20:07:19,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 156 events. 12/156 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 113 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 124. Up to 2 conditions per place. [2022-12-12 20:07:19,009 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 160 transitions, 352 flow [2022-12-12 20:07:19,014 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 145 places, 144 transitions, 312 flow [2022-12-12 20:07:19,015 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-12 20:07:19,031 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 145 places, 144 transitions, 312 flow [2022-12-12 20:07:19,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 144 transitions, 312 flow [2022-12-12 20:07:19,075 INFO L130 PetriNetUnfolder]: 12/144 cut-off events. [2022-12-12 20:07:19,076 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-12 20:07:19,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 144 events. 12/144 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 112 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 124. Up to 2 conditions per place. [2022-12-12 20:07:19,081 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 145 places, 144 transitions, 312 flow [2022-12-12 20:07:19,081 INFO L226 LiptonReduction]: Number of co-enabled transitions 2280 [2022-12-12 20:07:24,223 INFO L241 LiptonReduction]: Total number of compositions: 113 [2022-12-12 20:07:24,233 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 20:07:24,237 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=false, 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;@2177a8d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 20:07:24,237 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-12 20:07:24,241 INFO L130 PetriNetUnfolder]: 4/30 cut-off events. [2022-12-12 20:07:24,242 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-12 20:07:24,242 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:07:24,242 INFO L214 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] [2022-12-12 20:07:24,242 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 2 more)] === [2022-12-12 20:07:24,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:07:24,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1695043003, now seen corresponding path program 1 times [2022-12-12 20:07:24,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:07:24,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568199203] [2022-12-12 20:07:24,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:07:24,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:07:24,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:07:24,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:07:24,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:07:24,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568199203] [2022-12-12 20:07:24,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568199203] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 20:07:24,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 20:07:24,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 20:07:24,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558810449] [2022-12-12 20:07:24,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 20:07:24,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 20:07:24,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:07:24,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 20:07:24,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-12 20:07:24,541 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 31 [2022-12-12 20:07:24,542 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 31 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:07:24,542 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:07:24,542 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 31 [2022-12-12 20:07:24,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:07:24,768 INFO L130 PetriNetUnfolder]: 1420/1898 cut-off events. [2022-12-12 20:07:24,768 INFO L131 PetriNetUnfolder]: For 89/89 co-relation queries the response was YES. [2022-12-12 20:07:24,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3999 conditions, 1898 events. 1420/1898 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 7133 event pairs, 765 based on Foata normal form. 0/1421 useless extension candidates. Maximal degree in co-relation 3498. Up to 1552 conditions per place. [2022-12-12 20:07:24,781 INFO L137 encePairwiseOnDemand]: 27/31 looper letters, 42 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2022-12-12 20:07:24,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 46 transitions, 215 flow [2022-12-12 20:07:24,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 20:07:24,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 20:07:24,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 50 transitions. [2022-12-12 20:07:24,794 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2022-12-12 20:07:24,803 INFO L295 CegarLoopForPetriNet]: 40 programPoint places, 3 predicate places. [2022-12-12 20:07:24,803 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 46 transitions, 215 flow [2022-12-12 20:07:24,810 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 46 transitions, 215 flow [2022-12-12 20:07:24,811 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 46 transitions, 215 flow [2022-12-12 20:07:24,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:07:24,812 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:07:24,812 INFO L214 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] [2022-12-12 20:07:24,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 20:07:24,812 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 2 more)] === [2022-12-12 20:07:24,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:07:24,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1731643137, now seen corresponding path program 1 times [2022-12-12 20:07:24,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:07:24,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706099084] [2022-12-12 20:07:24,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:07:24,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:07:24,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:07:24,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:07:24,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:07:24,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706099084] [2022-12-12 20:07:24,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706099084] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 20:07:24,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 20:07:24,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 20:07:24,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486709969] [2022-12-12 20:07:24,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 20:07:24,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 20:07:24,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:07:24,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 20:07:24,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-12 20:07:24,977 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-12 20:07:24,977 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 46 transitions, 215 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:07:24,977 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:07:24,977 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-12 20:07:24,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:07:25,223 INFO L130 PetriNetUnfolder]: 1718/2336 cut-off events. [2022-12-12 20:07:25,223 INFO L131 PetriNetUnfolder]: For 556/556 co-relation queries the response was YES. [2022-12-12 20:07:25,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7130 conditions, 2336 events. 1718/2336 cut-off events. For 556/556 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8318 event pairs, 787 based on Foata normal form. 0/1943 useless extension candidates. Maximal degree in co-relation 6270. Up to 1808 conditions per place. [2022-12-12 20:07:25,232 INFO L137 encePairwiseOnDemand]: 27/31 looper letters, 69 selfloop transitions, 4 changer transitions 0/73 dead transitions. [2022-12-12 20:07:25,233 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 73 transitions, 481 flow [2022-12-12 20:07:25,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 20:07:25,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 20:07:25,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 49 transitions. [2022-12-12 20:07:25,234 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3951612903225806 [2022-12-12 20:07:25,235 INFO L295 CegarLoopForPetriNet]: 40 programPoint places, 6 predicate places. [2022-12-12 20:07:25,235 INFO L82 GeneralOperation]: Start removeDead. Operand has 46 places, 73 transitions, 481 flow [2022-12-12 20:07:25,243 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 73 transitions, 481 flow [2022-12-12 20:07:25,244 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 73 transitions, 481 flow [2022-12-12 20:07:25,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:07:25,244 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:07:25,244 INFO L214 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] [2022-12-12 20:07:25,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-12 20:07:25,245 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 2 more)] === [2022-12-12 20:07:25,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:07:25,246 INFO L85 PathProgramCache]: Analyzing trace with hash -632645235, now seen corresponding path program 1 times [2022-12-12 20:07:25,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:07:25,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582896739] [2022-12-12 20:07:25,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:07:25,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:07:25,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:07:25,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:07:25,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:07:25,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582896739] [2022-12-12 20:07:25,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582896739] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 20:07:25,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 20:07:25,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 20:07:25,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585231223] [2022-12-12 20:07:25,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 20:07:25,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 20:07:25,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:07:25,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 20:07:25,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-12 20:07:25,373 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 31 [2022-12-12 20:07:25,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 73 transitions, 481 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:07:25,373 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:07:25,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 31 [2022-12-12 20:07:25,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:07:25,615 INFO L130 PetriNetUnfolder]: 2138/2902 cut-off events. [2022-12-12 20:07:25,615 INFO L131 PetriNetUnfolder]: For 1830/1830 co-relation queries the response was YES. [2022-12-12 20:07:25,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11581 conditions, 2902 events. 2138/2902 cut-off events. For 1830/1830 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10877 event pairs, 787 based on Foata normal form. 0/2449 useless extension candidates. Maximal degree in co-relation 10240. Up to 2244 conditions per place. [2022-12-12 20:07:25,633 INFO L137 encePairwiseOnDemand]: 27/31 looper letters, 107 selfloop transitions, 9 changer transitions 0/117 dead transitions. [2022-12-12 20:07:25,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 117 transitions, 1001 flow [2022-12-12 20:07:25,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 20:07:25,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 20:07:25,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 50 transitions. [2022-12-12 20:07:25,636 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2022-12-12 20:07:25,637 INFO L295 CegarLoopForPetriNet]: 40 programPoint places, 9 predicate places. [2022-12-12 20:07:25,637 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 117 transitions, 1001 flow [2022-12-12 20:07:25,653 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 117 transitions, 1001 flow [2022-12-12 20:07:25,653 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 117 transitions, 1001 flow [2022-12-12 20:07:25,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:07:25,654 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:07:25,654 INFO L214 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] [2022-12-12 20:07:25,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-12 20:07:25,654 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 2 more)] === [2022-12-12 20:07:25,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:07:25,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1239127188, now seen corresponding path program 1 times [2022-12-12 20:07:25,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:07:25,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832493159] [2022-12-12 20:07:25,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:07:25,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:07:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:07:25,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:07:25,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:07:25,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832493159] [2022-12-12 20:07:25,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832493159] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 20:07:25,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 20:07:25,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-12 20:07:25,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196940303] [2022-12-12 20:07:25,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 20:07:25,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 20:07:25,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:07:25,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 20:07:25,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 20:07:25,777 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 31 [2022-12-12 20:07:25,777 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 117 transitions, 1001 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:07:25,777 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:07:25,777 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 31 [2022-12-12 20:07:25,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:07:26,010 INFO L130 PetriNetUnfolder]: 2138/2903 cut-off events. [2022-12-12 20:07:26,010 INFO L131 PetriNetUnfolder]: For 3554/3554 co-relation queries the response was YES. [2022-12-12 20:07:26,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14315 conditions, 2903 events. 2138/2903 cut-off events. For 3554/3554 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10947 event pairs, 787 based on Foata normal form. 0/2450 useless extension candidates. Maximal degree in co-relation 12660. Up to 2729 conditions per place. [2022-12-12 20:07:26,028 INFO L137 encePairwiseOnDemand]: 28/31 looper letters, 115 selfloop transitions, 2 changer transitions 0/118 dead transitions. [2022-12-12 20:07:26,029 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 118 transitions, 1243 flow [2022-12-12 20:07:26,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 20:07:26,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 20:07:26,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 35 transitions. [2022-12-12 20:07:26,033 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2022-12-12 20:07:26,034 INFO L295 CegarLoopForPetriNet]: 40 programPoint places, 11 predicate places. [2022-12-12 20:07:26,034 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 118 transitions, 1243 flow [2022-12-12 20:07:26,047 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 118 transitions, 1243 flow [2022-12-12 20:07:26,047 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 118 transitions, 1243 flow [2022-12-12 20:07:26,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:07:26,047 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:07:26,047 INFO L214 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] [2022-12-12 20:07:26,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-12 20:07:26,048 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 2 more)] === [2022-12-12 20:07:26,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:07:26,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1940848906, now seen corresponding path program 1 times [2022-12-12 20:07:26,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:07:26,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041536033] [2022-12-12 20:07:26,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:07:26,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:07:26,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:07:26,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:07:26,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:07:26,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041536033] [2022-12-12 20:07:26,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041536033] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:07:26,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18931658] [2022-12-12 20:07:26,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:07:26,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:07:26,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:07:26,575 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) [2022-12-12 20:07:26,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-12 20:07:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:07:26,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-12 20:07:26,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:07:26,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:07:26,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 20:07:26,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-12 20:07:26,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:07:26,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:07:27,176 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_181 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_181) c_~A~0.base) c_~A~0.offset))) (or (<= 2147483647 .cse0) (<= c_~min~0 (+ .cse0 1))))) is different from false [2022-12-12 20:07:31,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2022-12-12 20:07:31,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-12 20:07:31,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:07:31,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18931658] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:07:31,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:07:31,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 27 [2022-12-12 20:07:31,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783921252] [2022-12-12 20:07:31,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:07:31,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-12 20:07:31,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:07:31,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-12 20:07:31,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=627, Unknown=7, NotChecked=52, Total=812 [2022-12-12 20:07:31,412 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 31 [2022-12-12 20:07:31,412 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 118 transitions, 1243 flow. Second operand has 29 states, 29 states have (on average 4.0344827586206895) internal successors, (117), 29 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:07:31,412 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:07:31,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 31 [2022-12-12 20:07:31,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:07:36,917 INFO L130 PetriNetUnfolder]: 20150/27622 cut-off events. [2022-12-12 20:07:36,918 INFO L131 PetriNetUnfolder]: For 49527/49527 co-relation queries the response was YES. [2022-12-12 20:07:36,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162237 conditions, 27622 events. 20150/27622 cut-off events. For 49527/49527 co-relation queries the response was YES. Maximal size of possible extension queue 1016. Compared 155381 event pairs, 517 based on Foata normal form. 13/22156 useless extension candidates. Maximal degree in co-relation 145930. Up to 26063 conditions per place. [2022-12-12 20:07:37,043 INFO L137 encePairwiseOnDemand]: 19/31 looper letters, 655 selfloop transitions, 172 changer transitions 1187/2015 dead transitions. [2022-12-12 20:07:37,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 2015 transitions, 25228 flow [2022-12-12 20:07:37,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-12-12 20:07:37,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-12-12 20:07:37,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 856 transitions. [2022-12-12 20:07:37,047 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4844368986983588 [2022-12-12 20:07:37,049 INFO L295 CegarLoopForPetriNet]: 40 programPoint places, 67 predicate places. [2022-12-12 20:07:37,050 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 2015 transitions, 25228 flow [2022-12-12 20:07:37,127 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 828 transitions, 10381 flow [2022-12-12 20:07:37,127 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 828 transitions, 10381 flow [2022-12-12 20:07:37,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.0344827586206895) internal successors, (117), 29 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:07:37,128 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:07:37,128 INFO L214 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] [2022-12-12 20:07:37,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-12-12 20:07:37,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:07:37,334 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 2 more)] === [2022-12-12 20:07:37,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:07:37,335 INFO L85 PathProgramCache]: Analyzing trace with hash 402693150, now seen corresponding path program 2 times [2022-12-12 20:07:37,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:07:37,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582611668] [2022-12-12 20:07:37,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:07:37,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:07:37,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:07:37,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 20:07:37,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:07:37,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582611668] [2022-12-12 20:07:37,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582611668] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 20:07:37,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 20:07:37,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-12 20:07:37,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812550002] [2022-12-12 20:07:37,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 20:07:37,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 20:07:37,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:07:37,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 20:07:37,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-12 20:07:37,573 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 31 [2022-12-12 20:07:37,573 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 828 transitions, 10381 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:07:37,573 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:07:37,573 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 31 [2022-12-12 20:07:37,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:07:39,706 INFO L130 PetriNetUnfolder]: 13704/19298 cut-off events. [2022-12-12 20:07:39,706 INFO L131 PetriNetUnfolder]: For 50831/50831 co-relation queries the response was YES. [2022-12-12 20:07:39,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130705 conditions, 19298 events. 13704/19298 cut-off events. For 50831/50831 co-relation queries the response was YES. Maximal size of possible extension queue 701. Compared 109232 event pairs, 51 based on Foata normal form. 11/15202 useless extension candidates. Maximal degree in co-relation 119104. Up to 18133 conditions per place. [2022-12-12 20:07:39,807 INFO L137 encePairwiseOnDemand]: 27/31 looper letters, 710 selfloop transitions, 16 changer transitions 1085/1812 dead transitions. [2022-12-12 20:07:39,807 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 1812 transitions, 26207 flow [2022-12-12 20:07:39,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 20:07:39,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 20:07:39,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2022-12-12 20:07:39,808 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4967741935483871 [2022-12-12 20:07:39,809 INFO L295 CegarLoopForPetriNet]: 40 programPoint places, 39 predicate places. [2022-12-12 20:07:39,809 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 1812 transitions, 26207 flow [2022-12-12 20:07:39,871 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 727 transitions, 10621 flow [2022-12-12 20:07:39,871 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 727 transitions, 10621 flow [2022-12-12 20:07:39,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:07:39,872 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:07:39,872 INFO L214 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] [2022-12-12 20:07:39,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-12 20:07:39,872 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 2 more)] === [2022-12-12 20:07:39,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:07:39,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1983837324, now seen corresponding path program 3 times [2022-12-12 20:07:39,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:07:39,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730600681] [2022-12-12 20:07:39,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:07:39,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:07:39,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:07:40,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:07:40,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:07:40,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730600681] [2022-12-12 20:07:40,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730600681] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:07:40,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806007672] [2022-12-12 20:07:40,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 20:07:40,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:07:40,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:07:40,237 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) [2022-12-12 20:07:40,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-12 20:07:40,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 20:07:40,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:07:40,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-12 20:07:40,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:07:40,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:07:40,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 20:07:40,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-12 20:07:40,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:07:40,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:07:46,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2022-12-12 20:07:46,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-12 20:07:46,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:07:46,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806007672] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 20:07:46,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 20:07:46,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 7] total 19 [2022-12-12 20:07:46,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267982375] [2022-12-12 20:07:46,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 20:07:46,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-12 20:07:46,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:07:46,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-12 20:07:46,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=324, Unknown=10, NotChecked=0, Total=420 [2022-12-12 20:07:46,929 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 31 [2022-12-12 20:07:46,929 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 727 transitions, 10621 flow. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:07:46,929 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:07:46,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 31 [2022-12-12 20:07:46,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:07:57,325 INFO L130 PetriNetUnfolder]: 13130/18295 cut-off events. [2022-12-12 20:07:57,326 INFO L131 PetriNetUnfolder]: For 72851/72851 co-relation queries the response was YES. [2022-12-12 20:07:57,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141501 conditions, 18295 events. 13130/18295 cut-off events. For 72851/72851 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 100013 event pairs, 202 based on Foata normal form. 3/14530 useless extension candidates. Maximal degree in co-relation 122238. Up to 17143 conditions per place. [2022-12-12 20:07:57,420 INFO L137 encePairwiseOnDemand]: 21/31 looper letters, 1181 selfloop transitions, 94 changer transitions 449/1725 dead transitions. [2022-12-12 20:07:57,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 1725 transitions, 28521 flow [2022-12-12 20:07:57,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 20:07:57,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 20:07:57,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2022-12-12 20:07:57,421 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4838709677419355 [2022-12-12 20:07:57,422 INFO L295 CegarLoopForPetriNet]: 40 programPoint places, 36 predicate places. [2022-12-12 20:07:57,422 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 1725 transitions, 28521 flow [2022-12-12 20:07:57,492 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 1276 transitions, 21121 flow [2022-12-12 20:07:57,492 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 1276 transitions, 21121 flow [2022-12-12 20:07:57,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:07:57,493 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:07:57,493 INFO L214 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] [2022-12-12 20:07:57,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-12 20:07:57,695 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 [2022-12-12 20:07:57,695 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 2 more)] === [2022-12-12 20:07:57,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:07:57,696 INFO L85 PathProgramCache]: Analyzing trace with hash 216281604, now seen corresponding path program 4 times [2022-12-12 20:07:57,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:07:57,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440380203] [2022-12-12 20:07:57,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:07:57,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:07:57,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:07:58,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:07:58,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:07:58,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440380203] [2022-12-12 20:07:58,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440380203] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:07:58,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065426784] [2022-12-12 20:07:58,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 20:07:58,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:07:58,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:07:58,105 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) [2022-12-12 20:07:58,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-12 20:07:58,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 20:07:58,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:07:58,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-12 20:07:58,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:07:58,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:07:58,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 20:07:58,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:07:58,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 20:07:58,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-12 20:07:58,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:07:58,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:08:00,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 97 [2022-12-12 20:08:00,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 85 [2022-12-12 20:08:00,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2022-12-12 20:08:00,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 1 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:08:00,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065426784] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:08:00,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:08:00,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 22 [2022-12-12 20:08:00,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155347383] [2022-12-12 20:08:00,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:08:00,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-12 20:08:00,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:08:00,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-12 20:08:00,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=425, Unknown=25, NotChecked=0, Total=552 [2022-12-12 20:08:00,762 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 31 [2022-12-12 20:08:00,762 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 1276 transitions, 21121 flow. Second operand has 24 states, 24 states have (on average 4.25) internal successors, (102), 24 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:08:00,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:08:00,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 31 [2022-12-12 20:08:00,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:08:06,101 INFO L130 PetriNetUnfolder]: 22901/31908 cut-off events. [2022-12-12 20:08:06,101 INFO L131 PetriNetUnfolder]: For 186344/186344 co-relation queries the response was YES. [2022-12-12 20:08:06,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275230 conditions, 31908 events. 22901/31908 cut-off events. For 186344/186344 co-relation queries the response was YES. Maximal size of possible extension queue 1170. Compared 189760 event pairs, 169 based on Foata normal form. 7/25274 useless extension candidates. Maximal degree in co-relation 219008. Up to 29668 conditions per place. [2022-12-12 20:08:06,263 INFO L137 encePairwiseOnDemand]: 22/31 looper letters, 1839 selfloop transitions, 253 changer transitions 1263/3356 dead transitions. [2022-12-12 20:08:06,263 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 3356 transitions, 62374 flow [2022-12-12 20:08:06,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-12 20:08:06,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-12 20:08:06,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 261 transitions. [2022-12-12 20:08:06,265 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4952561669829222 [2022-12-12 20:08:06,267 INFO L295 CegarLoopForPetriNet]: 40 programPoint places, 50 predicate places. [2022-12-12 20:08:06,267 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 3356 transitions, 62374 flow [2022-12-12 20:08:06,388 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 2093 transitions, 38881 flow [2022-12-12 20:08:06,388 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 2093 transitions, 38881 flow [2022-12-12 20:08:06,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.25) internal successors, (102), 24 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:08:06,388 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:08:06,388 INFO L214 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] [2022-12-12 20:08:06,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-12 20:08:06,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:08:06,592 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 2 more)] === [2022-12-12 20:08:06,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:08:06,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1728791996, now seen corresponding path program 5 times [2022-12-12 20:08:06,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:08:06,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020303092] [2022-12-12 20:08:06,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:08:06,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:08:06,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:08:06,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:08:06,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:08:06,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020303092] [2022-12-12 20:08:06,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020303092] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:08:06,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476161088] [2022-12-12 20:08:06,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 20:08:06,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:08:06,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:08:06,955 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) [2022-12-12 20:08:06,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-12 20:08:07,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 20:08:07,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:08:07,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-12 20:08:07,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:08:07,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-12 20:08:07,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-12 20:08:07,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:08:07,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:08:07,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:08:07,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476161088] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 20:08:07,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 20:08:07,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 8] total 18 [2022-12-12 20:08:07,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023771610] [2022-12-12 20:08:07,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 20:08:07,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 20:08:07,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:08:07,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 20:08:07,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-12-12 20:08:07,340 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 31 [2022-12-12 20:08:07,340 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 2093 transitions, 38881 flow. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:08:07,340 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:08:07,340 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 31 [2022-12-12 20:08:07,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:08:16,493 INFO L130 PetriNetUnfolder]: 33683/47048 cut-off events. [2022-12-12 20:08:16,493 INFO L131 PetriNetUnfolder]: For 321623/321623 co-relation queries the response was YES. [2022-12-12 20:08:16,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451643 conditions, 47048 events. 33683/47048 cut-off events. For 321623/321623 co-relation queries the response was YES. Maximal size of possible extension queue 1639. Compared 294663 event pairs, 238 based on Foata normal form. 21/36827 useless extension candidates. Maximal degree in co-relation 359932. Up to 44042 conditions per place. [2022-12-12 20:08:16,757 INFO L137 encePairwiseOnDemand]: 20/31 looper letters, 2946 selfloop transitions, 257 changer transitions 1470/4674 dead transitions. [2022-12-12 20:08:16,757 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 4674 transitions, 96185 flow [2022-12-12 20:08:16,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-12 20:08:16,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-12 20:08:16,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 178 transitions. [2022-12-12 20:08:16,758 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5219941348973607 [2022-12-12 20:08:16,758 INFO L295 CegarLoopForPetriNet]: 40 programPoint places, 52 predicate places. [2022-12-12 20:08:16,758 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 4674 transitions, 96185 flow [2022-12-12 20:08:17,100 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 3204 transitions, 65957 flow [2022-12-12 20:08:17,100 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 3204 transitions, 65957 flow [2022-12-12 20:08:17,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:08:17,100 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:08:17,100 INFO L214 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] [2022-12-12 20:08:17,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-12 20:08:17,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:08:17,305 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 2 more)] === [2022-12-12 20:08:17,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:08:17,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1165015176, now seen corresponding path program 6 times [2022-12-12 20:08:17,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:08:17,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713951836] [2022-12-12 20:08:17,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:08:17,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:08:17,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:08:17,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:08:17,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:08:17,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713951836] [2022-12-12 20:08:17,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713951836] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:08:17,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356491321] [2022-12-12 20:08:17,537 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 20:08:17,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:08:17,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:08:17,538 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:08:17,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-12 20:08:17,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-12 20:08:17,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:08:17,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-12 20:08:17,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:08:17,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-12-12 20:08:17,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-12 20:08:17,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:08:17,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:08:18,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:08:18,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356491321] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:08:18,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:08:18,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 9] total 23 [2022-12-12 20:08:18,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064748511] [2022-12-12 20:08:18,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:08:18,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-12 20:08:18,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:08:18,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-12 20:08:18,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2022-12-12 20:08:18,140 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-12 20:08:18,140 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 3204 transitions, 65957 flow. Second operand has 24 states, 23 states have (on average 3.391304347826087) internal successors, (78), 24 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:08:18,140 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:08:18,140 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-12 20:08:18,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:08:46,465 INFO L130 PetriNetUnfolder]: 53474/74938 cut-off events. [2022-12-12 20:08:46,466 INFO L131 PetriNetUnfolder]: For 230474/230474 co-relation queries the response was YES. [2022-12-12 20:08:46,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 806334 conditions, 74938 events. 53474/74938 cut-off events. For 230474/230474 co-relation queries the response was YES. Maximal size of possible extension queue 2713. Compared 496007 event pairs, 291 based on Foata normal form. 45/57160 useless extension candidates. Maximal degree in co-relation 642410. Up to 71693 conditions per place. [2022-12-12 20:08:46,842 INFO L137 encePairwiseOnDemand]: 18/31 looper letters, 3078 selfloop transitions, 460 changer transitions 4742/8280 dead transitions. [2022-12-12 20:08:46,842 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 8280 transitions, 186253 flow [2022-12-12 20:08:46,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-12-12 20:08:46,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2022-12-12 20:08:46,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 1233 transitions. [2022-12-12 20:08:46,847 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.39380389651868414 [2022-12-12 20:08:46,847 INFO L295 CegarLoopForPetriNet]: 40 programPoint places, 148 predicate places. [2022-12-12 20:08:46,847 INFO L82 GeneralOperation]: Start removeDead. Operand has 188 places, 8280 transitions, 186253 flow [2022-12-12 20:08:47,121 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 3538 transitions, 79673 flow [2022-12-12 20:08:47,122 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 3538 transitions, 79673 flow [2022-12-12 20:08:47,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.391304347826087) internal successors, (78), 24 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:08:47,122 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:08:47,122 INFO L214 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] [2022-12-12 20:08:47,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-12 20:08:47,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-12 20:08:47,328 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-12 20:08:47,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:08:47,328 INFO L85 PathProgramCache]: Analyzing trace with hash -683895082, now seen corresponding path program 7 times [2022-12-12 20:08:47,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:08:47,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32174623] [2022-12-12 20:08:47,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:08:47,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:08:47,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:08:47,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:08:47,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:08:47,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32174623] [2022-12-12 20:08:47,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32174623] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:08:47,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177109329] [2022-12-12 20:08:47,824 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 20:08:47,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:08:47,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:08:47,825 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:08:47,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-12 20:08:47,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:08:47,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-12 20:08:47,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:08:47,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:08:47,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:08:47,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:08:47,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-12 20:08:47,972 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 11 treesize of output 7 [2022-12-12 20:08:47,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 20:08:48,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:08:48,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 20:08:48,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 20:08:48,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-12-12 20:08:48,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:08:48,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-12 20:08:48,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-12 20:08:48,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:08:48,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:08:50,983 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_551 Int) (v_ArrVal_552 (Array Int Int))) (let ((.cse0 (select |c_#memory_int| c_~A~0.base))) (let ((.cse1 (select (select (store (store |c_#memory_int| c_~A~0.base (store .cse0 c_~A~0.offset v_ArrVal_551)) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_552) c_~A~0.base) c_~A~0.offset))) (or (not (<= (+ (select .cse0 c_~A~0.offset) 1) v_ArrVal_551)) (< 2147483646 .cse1) (< c_~min~0 (+ .cse1 2)))))) (= (mod c_~b1~0 256) 0)) is different from false [2022-12-12 20:08:51,010 WARN L837 $PredicateComparison]: unable to prove that (or (= (mod c_~b1~0 256) 0) (forall ((v_ArrVal_551 Int) (v_ArrVal_549 (Array Int Int)) (v_ArrVal_552 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_549))) (let ((.cse1 (select .cse2 c_~A~0.base))) (let ((.cse0 (select (select (store (store .cse2 c_~A~0.base (store .cse1 c_~A~0.offset v_ArrVal_551)) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_552) c_~A~0.base) c_~A~0.offset))) (or (< 2147483646 .cse0) (< c_~min~0 (+ 2 .cse0)) (not (<= (+ (select .cse1 c_~A~0.offset) 1) v_ArrVal_551)))))))) is different from false [2022-12-12 20:08:51,367 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_548 (Array Int Int)) (v_ArrVal_551 Int) (v_ArrVal_549 (Array Int Int)) (v_ArrVal_552 (Array Int Int))) (let ((.cse2 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_548) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_549))) (let ((.cse1 (select .cse2 c_~A~0.base))) (let ((.cse0 (select (select (store (store .cse2 c_~A~0.base (store .cse1 c_~A~0.offset v_ArrVal_551)) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_552) c_~A~0.base) c_~A~0.offset))) (or (< 2147483646 .cse0) (not (<= (+ (select .cse1 c_~A~0.offset) 1) v_ArrVal_551)) (< (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) (+ .cse0 2))))))) is different from false [2022-12-12 20:08:51,389 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_548 (Array Int Int)) (v_ArrVal_547 (Array Int Int)) (v_ArrVal_551 Int) (v_ArrVal_549 (Array Int Int)) (v_ArrVal_552 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_547))) (let ((.cse3 (store (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_548) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_549))) (let ((.cse2 (select .cse3 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse1 (select (select (store (store .cse3 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse2 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| v_ArrVal_551)) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_552) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (or (< (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) (+ .cse1 2)) (not (<= (+ (select .cse2 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 1) v_ArrVal_551)) (< 2147483646 .cse1))))))) is different from false [2022-12-12 20:08:51,397 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:08:51,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 173 treesize of output 113 [2022-12-12 20:08:51,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1925 treesize of output 1789 [2022-12-12 20:08:51,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1352 treesize of output 1284 [2022-12-12 20:08:51,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1451 treesize of output 1355 [2022-12-12 20:08:51,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 254 [2022-12-12 20:08:51,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 254 treesize of output 246 [2022-12-12 20:09:05,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 1 trivial. 1 not checked. [2022-12-12 20:09:05,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177109329] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:09:05,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:09:05,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 36 [2022-12-12 20:09:05,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212294746] [2022-12-12 20:09:05,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:09:05,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-12 20:09:05,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:09:05,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-12 20:09:05,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=916, Unknown=36, NotChecked=268, Total=1406 [2022-12-12 20:09:05,115 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-12 20:09:05,115 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 3538 transitions, 79673 flow. Second operand has 38 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:09:05,115 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:09:05,115 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-12 20:09:05,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:09:34,280 INFO L130 PetriNetUnfolder]: 49223/69368 cut-off events. [2022-12-12 20:09:34,280 INFO L131 PetriNetUnfolder]: For 135802/135802 co-relation queries the response was YES. [2022-12-12 20:09:34,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 819450 conditions, 69368 events. 49223/69368 cut-off events. For 135802/135802 co-relation queries the response was YES. Maximal size of possible extension queue 2454. Compared 456177 event pairs, 214 based on Foata normal form. 57/52246 useless extension candidates. Maximal degree in co-relation 645000. Up to 66901 conditions per place. [2022-12-12 20:09:34,599 INFO L137 encePairwiseOnDemand]: 21/31 looper letters, 2059 selfloop transitions, 293 changer transitions 6976/9328 dead transitions. [2022-12-12 20:09:34,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 9328 transitions, 228305 flow [2022-12-12 20:09:34,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-12 20:09:34,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-12 20:09:34,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 419 transitions. [2022-12-12 20:09:34,601 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.39753320683111953 [2022-12-12 20:09:34,601 INFO L295 CegarLoopForPetriNet]: 40 programPoint places, 121 predicate places. [2022-12-12 20:09:34,601 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 9328 transitions, 228305 flow [2022-12-12 20:09:34,927 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 2352 transitions, 57506 flow [2022-12-12 20:09:34,928 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 2352 transitions, 57506 flow [2022-12-12 20:09:34,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:09:34,928 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:09:34,928 INFO L214 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] [2022-12-12 20:09:34,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-12 20:09:35,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:09:35,129 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-12 20:09:35,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:09:35,129 INFO L85 PathProgramCache]: Analyzing trace with hash 538754626, now seen corresponding path program 8 times [2022-12-12 20:09:35,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:09:35,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422746123] [2022-12-12 20:09:35,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:09:35,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:09:35,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:09:35,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:09:35,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:09:35,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422746123] [2022-12-12 20:09:35,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422746123] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:09:35,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266427562] [2022-12-12 20:09:35,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 20:09:35,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:09:35,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:09:35,455 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:09:35,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-12 20:09:35,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 20:09:35,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:09:35,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-12 20:09:35,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:09:35,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:09:35,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 20:09:35,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-12 20:09:35,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:09:35,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:09:36,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-12-12 20:09:36,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:09:36,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266427562] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 20:09:36,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 20:09:36,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 8] total 22 [2022-12-12 20:09:36,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774550770] [2022-12-12 20:09:36,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 20:09:36,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-12 20:09:36,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:09:36,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-12 20:09:36,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-12-12 20:09:36,046 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 31 [2022-12-12 20:09:36,046 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 2352 transitions, 57506 flow. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:09:36,046 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:09:36,046 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 31 [2022-12-12 20:09:36,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:09:46,878 INFO L130 PetriNetUnfolder]: 25106/35529 cut-off events. [2022-12-12 20:09:46,878 INFO L131 PetriNetUnfolder]: For 59382/59382 co-relation queries the response was YES. [2022-12-12 20:09:46,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 453857 conditions, 35529 events. 25106/35529 cut-off events. For 59382/59382 co-relation queries the response was YES. Maximal size of possible extension queue 1369. Compared 217646 event pairs, 239 based on Foata normal form. 12/26912 useless extension candidates. Maximal degree in co-relation 433628. Up to 34307 conditions per place. [2022-12-12 20:09:47,118 INFO L137 encePairwiseOnDemand]: 21/31 looper letters, 2693 selfloop transitions, 167 changer transitions 704/3580 dead transitions. [2022-12-12 20:09:47,119 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 3580 transitions, 94760 flow [2022-12-12 20:09:47,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-12 20:09:47,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-12 20:09:47,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 157 transitions. [2022-12-12 20:09:47,120 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4220430107526882 [2022-12-12 20:09:47,120 INFO L295 CegarLoopForPetriNet]: 40 programPoint places, 96 predicate places. [2022-12-12 20:09:47,120 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 3580 transitions, 94760 flow [2022-12-12 20:09:47,303 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 132 places, 2876 transitions, 76096 flow [2022-12-12 20:09:47,303 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 2876 transitions, 76096 flow [2022-12-12 20:09:47,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:09:47,303 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:09:47,303 INFO L214 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] [2022-12-12 20:09:47,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-12 20:09:47,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:09:47,504 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-12 20:09:47,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:09:47,504 INFO L85 PathProgramCache]: Analyzing trace with hash -2240984, now seen corresponding path program 9 times [2022-12-12 20:09:47,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:09:47,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126977537] [2022-12-12 20:09:47,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:09:47,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:09:47,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:09:47,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 20:09:47,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:09:47,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126977537] [2022-12-12 20:09:47,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126977537] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 20:09:47,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 20:09:47,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-12 20:09:47,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510087027] [2022-12-12 20:09:47,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 20:09:47,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 20:09:47,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:09:47,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 20:09:47,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-12 20:09:47,629 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 31 [2022-12-12 20:09:47,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 2876 transitions, 76096 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:09:47,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:09:47,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 31 [2022-12-12 20:09:47,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:09:59,818 INFO L130 PetriNetUnfolder]: 25012/35658 cut-off events. [2022-12-12 20:09:59,819 INFO L131 PetriNetUnfolder]: For 48616/48616 co-relation queries the response was YES. [2022-12-12 20:09:59,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 489207 conditions, 35658 events. 25012/35658 cut-off events. For 48616/48616 co-relation queries the response was YES. Maximal size of possible extension queue 1431. Compared 222149 event pairs, 72 based on Foata normal form. 31/26869 useless extension candidates. Maximal degree in co-relation 467128. Up to 34378 conditions per place. [2022-12-12 20:10:00,035 INFO L137 encePairwiseOnDemand]: 27/31 looper letters, 2138 selfloop transitions, 45 changer transitions 2511/4702 dead transitions. [2022-12-12 20:10:00,035 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 4702 transitions, 133589 flow [2022-12-12 20:10:00,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 20:10:00,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 20:10:00,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 67 transitions. [2022-12-12 20:10:00,036 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.432258064516129 [2022-12-12 20:10:00,036 INFO L295 CegarLoopForPetriNet]: 40 programPoint places, 96 predicate places. [2022-12-12 20:10:00,036 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 4702 transitions, 133589 flow [2022-12-12 20:10:00,192 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 2191 transitions, 62523 flow [2022-12-12 20:10:00,193 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 2191 transitions, 62523 flow [2022-12-12 20:10:00,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:10:00,193 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:10:00,193 INFO L214 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] [2022-12-12 20:10:00,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-12 20:10:00,193 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-12 20:10:00,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:10:00,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1215778736, now seen corresponding path program 10 times [2022-12-12 20:10:00,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:10:00,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478092725] [2022-12-12 20:10:00,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:10:00,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:10:00,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:10:00,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:10:00,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:10:00,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478092725] [2022-12-12 20:10:00,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478092725] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:10:00,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787781906] [2022-12-12 20:10:00,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 20:10:00,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:10:00,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:10:00,550 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:10:00,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-12 20:10:00,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 20:10:00,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:10:00,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-12 20:10:00,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:10:00,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:10:00,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 20:10:00,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-12 20:10:00,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 20:10:00,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 20:10:00,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787781906] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 20:10:00,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 20:10:00,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 15 [2022-12-12 20:10:00,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944982711] [2022-12-12 20:10:00,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 20:10:00,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-12 20:10:00,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:10:00,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-12 20:10:00,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-12-12 20:10:00,806 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 31 [2022-12-12 20:10:00,806 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 2191 transitions, 62523 flow. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:10:00,806 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:10:00,806 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 31 [2022-12-12 20:10:00,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:10:07,932 INFO L130 PetriNetUnfolder]: 16050/22619 cut-off events. [2022-12-12 20:10:07,932 INFO L131 PetriNetUnfolder]: For 50804/50804 co-relation queries the response was YES. [2022-12-12 20:10:07,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331669 conditions, 22619 events. 16050/22619 cut-off events. For 50804/50804 co-relation queries the response was YES. Maximal size of possible extension queue 881. Compared 128589 event pairs, 210 based on Foata normal form. 12/17342 useless extension candidates. Maximal degree in co-relation 316584. Up to 22208 conditions per place. [2022-12-12 20:10:08,088 INFO L137 encePairwiseOnDemand]: 24/31 looper letters, 1652 selfloop transitions, 21 changer transitions 1178/2859 dead transitions. [2022-12-12 20:10:08,088 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 2859 transitions, 87259 flow [2022-12-12 20:10:08,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 20:10:08,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 20:10:08,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 115 transitions. [2022-12-12 20:10:08,089 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4637096774193548 [2022-12-12 20:10:08,089 INFO L295 CegarLoopForPetriNet]: 40 programPoint places, 81 predicate places. [2022-12-12 20:10:08,089 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 2859 transitions, 87259 flow [2022-12-12 20:10:08,214 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 116 places, 1681 transitions, 51313 flow [2022-12-12 20:10:08,215 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 1681 transitions, 51313 flow [2022-12-12 20:10:08,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:10:08,215 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:10:08,215 INFO L214 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] [2022-12-12 20:10:08,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-12 20:10:08,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-12 20:10:08,416 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-12 20:10:08,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:10:08,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1726034674, now seen corresponding path program 11 times [2022-12-12 20:10:08,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:10:08,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438370875] [2022-12-12 20:10:08,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:10:08,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:10:08,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:10:08,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:10:08,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:10:08,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438370875] [2022-12-12 20:10:08,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438370875] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:10:08,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735438671] [2022-12-12 20:10:08,738 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 20:10:08,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:10:08,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:10:08,740 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:10:08,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-12 20:10:08,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 20:10:08,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:10:08,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-12 20:10:08,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:10:08,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:10:08,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 20:10:09,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-12-12 20:10:09,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-12 20:10:09,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:10:09,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:10:11,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-12-12 20:10:11,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:10:11,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735438671] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:10:11,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:10:11,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2022-12-12 20:10:11,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270153873] [2022-12-12 20:10:11,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:10:11,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-12 20:10:11,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:10:11,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-12 20:10:11,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=720, Unknown=5, NotChecked=0, Total=870 [2022-12-12 20:10:11,396 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-12 20:10:11,397 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 1681 transitions, 51313 flow. Second operand has 30 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 29 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:10:11,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:10:11,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-12 20:10:11,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:10:34,582 INFO L130 PetriNetUnfolder]: 57841/80778 cut-off events. [2022-12-12 20:10:34,583 INFO L131 PetriNetUnfolder]: For 130123/130123 co-relation queries the response was YES. [2022-12-12 20:10:34,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1288582 conditions, 80778 events. 57841/80778 cut-off events. For 130123/130123 co-relation queries the response was YES. Maximal size of possible extension queue 2696. Compared 526792 event pairs, 342 based on Foata normal form. 82/57862 useless extension candidates. Maximal degree in co-relation 1204754. Up to 80052 conditions per place. [2022-12-12 20:10:35,182 INFO L137 encePairwiseOnDemand]: 21/31 looper letters, 4006 selfloop transitions, 536 changer transitions 4358/8900 dead transitions. [2022-12-12 20:10:35,182 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 8900 transitions, 289636 flow [2022-12-12 20:10:35,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-12 20:10:35,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-12-12 20:10:35,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 760 transitions. [2022-12-12 20:10:35,188 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.48070841239721696 [2022-12-12 20:10:35,188 INFO L295 CegarLoopForPetriNet]: 40 programPoint places, 126 predicate places. [2022-12-12 20:10:35,188 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 8900 transitions, 289636 flow [2022-12-12 20:10:35,592 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 4542 transitions, 147715 flow [2022-12-12 20:10:35,593 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 4542 transitions, 147715 flow [2022-12-12 20:10:35,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 29 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:10:35,593 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:10:35,593 INFO L214 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] [2022-12-12 20:10:35,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-12 20:10:35,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-12 20:10:35,798 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-12 20:10:35,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:10:35,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1598801134, now seen corresponding path program 12 times [2022-12-12 20:10:35,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:10:35,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568057384] [2022-12-12 20:10:35,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:10:35,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:10:35,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:10:36,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:10:36,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:10:36,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568057384] [2022-12-12 20:10:36,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568057384] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:10:36,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277754849] [2022-12-12 20:10:36,083 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 20:10:36,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:10:36,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:10:36,085 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:10:36,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-12 20:10:36,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 20:10:36,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:10:36,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-12 20:10:36,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:10:36,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:10:36,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 20:10:36,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:10:36,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 20:10:36,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-12-12 20:10:36,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-12 20:10:36,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:10:36,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:10:36,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:10:36,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277754849] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 20:10:36,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 20:10:36,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 11] total 24 [2022-12-12 20:10:36,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458292792] [2022-12-12 20:10:36,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 20:10:36,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-12 20:10:36,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:10:36,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-12 20:10:36,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-12-12 20:10:36,838 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 31 [2022-12-12 20:10:36,838 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 4542 transitions, 147715 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:10:36,838 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:10:36,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 31 [2022-12-12 20:10:36,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:11:27,353 INFO L130 PetriNetUnfolder]: 59309/82920 cut-off events. [2022-12-12 20:11:27,353 INFO L131 PetriNetUnfolder]: For 185798/185798 co-relation queries the response was YES. [2022-12-12 20:11:27,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1401145 conditions, 82920 events. 59309/82920 cut-off events. For 185798/185798 co-relation queries the response was YES. Maximal size of possible extension queue 2691. Compared 542169 event pairs, 391 based on Foata normal form. 53/60044 useless extension candidates. Maximal degree in co-relation 1310692. Up to 82354 conditions per place. [2022-12-12 20:11:28,161 INFO L137 encePairwiseOnDemand]: 21/31 looper letters, 5752 selfloop transitions, 366 changer transitions 2316/8457 dead transitions. [2022-12-12 20:11:28,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 8457 transitions, 292347 flow [2022-12-12 20:11:28,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-12 20:11:28,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-12 20:11:28,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2022-12-12 20:11:28,162 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5627240143369175 [2022-12-12 20:11:28,163 INFO L295 CegarLoopForPetriNet]: 40 programPoint places, 105 predicate places. [2022-12-12 20:11:28,163 INFO L82 GeneralOperation]: Start removeDead. Operand has 145 places, 8457 transitions, 292347 flow [2022-12-12 20:11:28,709 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 6141 transitions, 212106 flow [2022-12-12 20:11:28,709 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 6141 transitions, 212106 flow [2022-12-12 20:11:28,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:11:28,709 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:11:28,710 INFO L214 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] [2022-12-12 20:11:28,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-12 20:11:28,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-12 20:11:28,915 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-12 20:11:28,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:11:28,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1240393190, now seen corresponding path program 13 times [2022-12-12 20:11:28,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:11:28,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296017166] [2022-12-12 20:11:28,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:11:28,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:11:28,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:11:29,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:11:29,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:11:29,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296017166] [2022-12-12 20:11:29,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296017166] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:11:29,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037828405] [2022-12-12 20:11:29,152 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 20:11:29,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:11:29,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:11:29,153 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:11:29,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-12 20:11:29,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:11:29,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-12 20:11:29,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:11:29,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:11:29,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 20:11:29,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:11:29,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 20:11:29,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-12 20:11:29,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:11:29,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:11:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:11:29,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037828405] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 20:11:29,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 20:11:29,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 9] total 22 [2022-12-12 20:11:29,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894832899] [2022-12-12 20:11:29,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 20:11:29,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-12 20:11:29,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:11:29,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-12 20:11:29,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=408, Unknown=16, NotChecked=0, Total=506 [2022-12-12 20:11:29,770 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 31 [2022-12-12 20:11:29,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 6141 transitions, 212106 flow. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:11:29,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:11:29,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 31 [2022-12-12 20:11:29,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:12:51,360 INFO L130 PetriNetUnfolder]: 55624/78379 cut-off events. [2022-12-12 20:12:51,360 INFO L131 PetriNetUnfolder]: For 145113/145113 co-relation queries the response was YES. [2022-12-12 20:12:51,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1399834 conditions, 78379 events. 55624/78379 cut-off events. For 145113/145113 co-relation queries the response was YES. Maximal size of possible extension queue 2589. Compared 516973 event pairs, 329 based on Foata normal form. 19/56610 useless extension candidates. Maximal degree in co-relation 1312473. Up to 77813 conditions per place. [2022-12-12 20:12:52,073 INFO L137 encePairwiseOnDemand]: 21/31 looper letters, 6448 selfloop transitions, 619 changer transitions 603/7693 dead transitions. [2022-12-12 20:12:52,073 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 7693 transitions, 281120 flow [2022-12-12 20:12:52,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-12 20:12:52,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-12 20:12:52,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 192 transitions. [2022-12-12 20:12:52,076 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2022-12-12 20:12:52,076 INFO L295 CegarLoopForPetriNet]: 40 programPoint places, 114 predicate places. [2022-12-12 20:12:52,076 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 7693 transitions, 281120 flow [2022-12-12 20:12:52,822 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 152 places, 7090 transitions, 258992 flow [2022-12-12 20:12:52,822 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 7090 transitions, 258992 flow [2022-12-12 20:12:52,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:12:52,822 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:12:52,822 INFO L214 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] [2022-12-12 20:12:52,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-12 20:12:53,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-12 20:12:53,023 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-12 20:12:53,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:12:53,024 INFO L85 PathProgramCache]: Analyzing trace with hash 403391320, now seen corresponding path program 14 times [2022-12-12 20:12:53,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:12:53,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399674105] [2022-12-12 20:12:53,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:12:53,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:12:53,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:12:53,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:12:53,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:12:53,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399674105] [2022-12-12 20:12:53,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399674105] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:12:53,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237502018] [2022-12-12 20:12:53,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 20:12:53,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:12:53,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:12:53,466 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:12:53,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-12 20:12:53,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 20:12:53,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:12:53,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-12 20:12:53,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:12:53,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:12:53,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 20:12:53,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-12-12 20:12:53,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:12:53,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-12 20:12:53,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-12 20:12:53,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:12:53,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:12:56,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 81 [2022-12-12 20:12:56,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2022-12-12 20:12:56,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-12-12 20:12:56,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:12:56,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237502018] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:12:56,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:12:56,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2022-12-12 20:12:56,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440370600] [2022-12-12 20:12:56,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:12:56,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-12 20:12:56,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:12:56,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-12 20:12:56,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=960, Unknown=23, NotChecked=0, Total=1190 [2022-12-12 20:12:56,692 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-12 20:12:56,692 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 7090 transitions, 258992 flow. Second operand has 35 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:12:56,692 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:12:56,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-12 20:12:56,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:13:01,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 20:13:03,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 20:13:05,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 20:13:19,535 WARN L233 SmtUtils]: Spent 8.32s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 20:13:42,356 WARN L233 SmtUtils]: Spent 14.76s on a formula simplification. DAG size of input: 57 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 20:14:26,825 WARN L233 SmtUtils]: Spent 14.39s on a formula simplification. DAG size of input: 59 DAG size of output: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 20:16:31,350 INFO L130 PetriNetUnfolder]: 98011/138568 cut-off events. [2022-12-12 20:16:31,350 INFO L131 PetriNetUnfolder]: For 223742/223742 co-relation queries the response was YES. [2022-12-12 20:16:31,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2614682 conditions, 138568 events. 98011/138568 cut-off events. For 223742/223742 co-relation queries the response was YES. Maximal size of possible extension queue 4886. Compared 994029 event pairs, 169 based on Foata normal form. 132/99243 useless extension candidates. Maximal degree in co-relation 2455630. Up to 137972 conditions per place. [2022-12-12 20:16:32,305 INFO L137 encePairwiseOnDemand]: 21/31 looper letters, 5222 selfloop transitions, 557 changer transitions 13219/18998 dead transitions. [2022-12-12 20:16:32,305 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 18998 transitions, 731533 flow [2022-12-12 20:16:32,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-12-12 20:16:32,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-12-12 20:16:32,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 705 transitions. [2022-12-12 20:16:32,307 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.372818614489688 [2022-12-12 20:16:32,308 INFO L295 CegarLoopForPetriNet]: 40 programPoint places, 172 predicate places. [2022-12-12 20:16:32,308 INFO L82 GeneralOperation]: Start removeDead. Operand has 212 places, 18998 transitions, 731533 flow [2022-12-12 20:16:32,942 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 171 places, 5779 transitions, 222785 flow [2022-12-12 20:16:32,942 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 5779 transitions, 222785 flow [2022-12-12 20:16:32,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:16:32,943 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:16:32,943 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 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] [2022-12-12 20:16:32,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-12 20:16:33,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-12 20:16:33,147 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-12 20:16:33,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:16:33,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1779681182, now seen corresponding path program 15 times [2022-12-12 20:16:33,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:16:33,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190513273] [2022-12-12 20:16:33,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:16:33,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:16:33,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:16:33,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:16:33,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:16:33,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190513273] [2022-12-12 20:16:33,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190513273] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:16:33,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970790692] [2022-12-12 20:16:33,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 20:16:33,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:16:33,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:16:33,376 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:16:33,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-12 20:16:33,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 20:16:33,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:16:33,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 20:16:33,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:16:33,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:16:33,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:16:33,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:16:33,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970790692] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:16:33,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:16:33,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-12-12 20:16:33,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346551326] [2022-12-12 20:16:33,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:16:33,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-12 20:16:33,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:16:33,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-12 20:16:33,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-12-12 20:16:33,998 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-12 20:16:33,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 5779 transitions, 222785 flow. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:16:33,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:16:33,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-12 20:16:33,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:17:27,283 INFO L130 PetriNetUnfolder]: 42755/61325 cut-off events. [2022-12-12 20:17:27,283 INFO L131 PetriNetUnfolder]: For 47536/47536 co-relation queries the response was YES. [2022-12-12 20:17:27,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1229288 conditions, 61325 events. 42755/61325 cut-off events. For 47536/47536 co-relation queries the response was YES. Maximal size of possible extension queue 2236. Compared 404017 event pairs, 179 based on Foata normal form. 252/42966 useless extension candidates. Maximal degree in co-relation 1124661. Up to 61035 conditions per place. [2022-12-12 20:17:27,956 INFO L137 encePairwiseOnDemand]: 25/31 looper letters, 8706 selfloop transitions, 490 changer transitions 578/9774 dead transitions. [2022-12-12 20:17:27,956 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 9774 transitions, 396348 flow [2022-12-12 20:17:27,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 20:17:27,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 20:17:27,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 78 transitions. [2022-12-12 20:17:27,957 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.31451612903225806 [2022-12-12 20:17:27,957 INFO L295 CegarLoopForPetriNet]: 40 programPoint places, 138 predicate places. [2022-12-12 20:17:27,958 INFO L82 GeneralOperation]: Start removeDead. Operand has 178 places, 9774 transitions, 396348 flow [2022-12-12 20:17:28,473 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 9196 transitions, 373213 flow [2022-12-12 20:17:28,473 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 9196 transitions, 373213 flow [2022-12-12 20:17:28,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:17:28,474 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:17:28,474 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:17:28,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-12 20:17:28,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:17:28,674 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-12 20:17:28,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:17:28,675 INFO L85 PathProgramCache]: Analyzing trace with hash -185014634, now seen corresponding path program 16 times [2022-12-12 20:17:28,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:17:28,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580915666] [2022-12-12 20:17:28,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:17:28,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:17:28,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:17:28,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 20:17:28,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:17:28,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580915666] [2022-12-12 20:17:28,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580915666] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:17:28,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639979987] [2022-12-12 20:17:28,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 20:17:28,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:17:28,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:17:28,874 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:17:28,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-12 20:17:28,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 20:17:28,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:17:28,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 20:17:28,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:17:29,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 20:17:29,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:17:29,369 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 20:17:29,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639979987] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:17:29,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:17:29,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-12-12 20:17:29,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432942885] [2022-12-12 20:17:29,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:17:29,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-12 20:17:29,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:17:29,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-12 20:17:29,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-12-12 20:17:29,370 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 31 [2022-12-12 20:17:29,370 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 9196 transitions, 373213 flow. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:17:29,371 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:17:29,371 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 31 [2022-12-12 20:17:29,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:19:06,520 INFO L130 PetriNetUnfolder]: 38411/54286 cut-off events. [2022-12-12 20:19:06,521 INFO L131 PetriNetUnfolder]: For 26827/26827 co-relation queries the response was YES. [2022-12-12 20:19:06,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1143707 conditions, 54286 events. 38411/54286 cut-off events. For 26827/26827 co-relation queries the response was YES. Maximal size of possible extension queue 2047. Compared 345125 event pairs, 145 based on Foata normal form. 0/39602 useless extension candidates. Maximal degree in co-relation 1096008. Up to 54169 conditions per place. [2022-12-12 20:19:06,993 INFO L137 encePairwiseOnDemand]: 26/31 looper letters, 8627 selfloop transitions, 831 changer transitions 0/9473 dead transitions. [2022-12-12 20:19:06,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 9473 transitions, 402996 flow [2022-12-12 20:19:06,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 20:19:06,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 20:19:06,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 70 transitions. [2022-12-12 20:19:06,994 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3225806451612903 [2022-12-12 20:19:06,994 INFO L295 CegarLoopForPetriNet]: 40 programPoint places, 141 predicate places. [2022-12-12 20:19:06,994 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 9473 transitions, 402996 flow [2022-12-12 20:19:07,507 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 181 places, 9473 transitions, 402996 flow [2022-12-12 20:19:07,507 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 9473 transitions, 402996 flow [2022-12-12 20:19:07,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:19:07,508 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:19:07,508 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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] [2022-12-12 20:19:07,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-12 20:19:07,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:19:07,716 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-12 20:19:07,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:19:07,716 INFO L85 PathProgramCache]: Analyzing trace with hash 2126472191, now seen corresponding path program 17 times [2022-12-12 20:19:07,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:19:07,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15133588] [2022-12-12 20:19:07,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:19:07,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:19:07,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:19:07,892 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 20:19:07,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:19:07,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15133588] [2022-12-12 20:19:07,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15133588] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:19:07,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502677291] [2022-12-12 20:19:07,893 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 20:19:07,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:19:07,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:19:07,896 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:19:07,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-12 20:19:08,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 20:19:08,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:19:08,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 20:19:08,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:19:08,122 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 20:19:08,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:19:08,208 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 20:19:08,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502677291] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:19:08,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:19:08,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2022-12-12 20:19:08,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381655898] [2022-12-12 20:19:08,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:19:08,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-12 20:19:08,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:19:08,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-12 20:19:08,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-12-12 20:19:08,209 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-12 20:19:08,209 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 9473 transitions, 402996 flow. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:19:08,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:19:08,209 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-12 20:19:08,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2022-12-12 20:21:01,654 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 20:21:01,654 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 20:21:01,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-12 20:21:01,742 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 5 remaining) [2022-12-12 20:21:01,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-12 20:21:01,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:21:01,943 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (12states, 0/31 universal loopers) in iteration 21,while PetriNetUnfolder was constructing finite prefix that currently has 1201832 conditions, 54495 events (39326/54494 cut-off events. For 23728/23728 co-relation queries the response was YES. Maximal size of possible extension queue 2044. Compared 337978 event pairs, 84 based on Foata normal form. 0/40915 useless extension candidates. Maximal degree in co-relation 1194607. Up to 54377 conditions per place.). [2022-12-12 20:21:01,944 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 5 remaining) [2022-12-12 20:21:01,944 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2022-12-12 20:21:01,944 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 5 remaining) [2022-12-12 20:21:01,944 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 5 remaining) [2022-12-12 20:21:01,945 INFO L445 BasicCegarLoop]: Path program histogram: [17, 1, 1, 1, 1] [2022-12-12 20:21:01,956 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-12 20:21:01,956 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-12 20:21:01,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.12 08:21:01 BasicIcfg [2022-12-12 20:21:01,958 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-12 20:21:01,959 INFO L158 Benchmark]: Toolchain (without parser) took 823920.55ms. Allocated memory was 182.5MB in the beginning and 4.2GB in the end (delta: 4.0GB). Free memory was 158.9MB in the beginning and 1.1GB in the end (delta: -978.6MB). Peak memory consumption was 3.8GB. Max. memory is 8.0GB. [2022-12-12 20:21:01,959 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 182.5MB. Free memory is still 160.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-12-12 20:21:01,959 INFO L158 Benchmark]: CACSL2BoogieTranslator took 243.77ms. Allocated memory is still 182.5MB. Free memory was 158.9MB in the beginning and 144.8MB in the end (delta: 14.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2022-12-12 20:21:01,960 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.33ms. Allocated memory is still 182.5MB. Free memory was 144.8MB in the beginning and 143.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-12 20:21:01,960 INFO L158 Benchmark]: Boogie Preprocessor took 30.83ms. Allocated memory is still 182.5MB. Free memory was 143.2MB in the beginning and 141.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-12 20:21:01,960 INFO L158 Benchmark]: RCFGBuilder took 455.81ms. Allocated memory is still 182.5MB. Free memory was 141.1MB in the beginning and 118.0MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 8.0GB. [2022-12-12 20:21:01,961 INFO L158 Benchmark]: TraceAbstraction took 823157.65ms. Allocated memory was 182.5MB in the beginning and 4.2GB in the end (delta: 4.0GB). Free memory was 116.5MB in the beginning and 1.1GB in the end (delta: -1.0GB). Peak memory consumption was 3.8GB. Max. memory is 8.0GB. [2022-12-12 20:21:01,964 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 182.5MB. Free memory is still 160.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 243.77ms. Allocated memory is still 182.5MB. Free memory was 158.9MB in the beginning and 144.8MB in the end (delta: 14.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 25.33ms. Allocated memory is still 182.5MB. Free memory was 144.8MB in the beginning and 143.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 30.83ms. Allocated memory is still 182.5MB. Free memory was 143.2MB in the beginning and 141.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 455.81ms. Allocated memory is still 182.5MB. Free memory was 141.1MB in the beginning and 118.0MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 8.0GB. * TraceAbstraction took 823157.65ms. Allocated memory was 182.5MB in the beginning and 4.2GB in the end (delta: 4.0GB). Free memory was 116.5MB in the beginning and 1.1GB in the end (delta: -1.0GB). Peak memory consumption was 3.8GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.1s, 145 PlacesBefore, 40 PlacesAfterwards, 144 TransitionsBefore, 31 TransitionsAfterwards, 2280 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 66 TrivialYvCompositions, 39 ConcurrentYvCompositions, 8 ChoiceCompositions, 113 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 1331, independent: 1309, independent conditional: 1309, independent unconditional: 0, dependent: 22, dependent conditional: 22, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 1331, independent: 1309, independent conditional: 0, independent unconditional: 1309, dependent: 22, dependent conditional: 0, dependent unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 1331, independent: 1309, independent conditional: 0, independent unconditional: 1309, dependent: 22, dependent conditional: 0, dependent unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 1331, independent: 1309, independent conditional: 0, independent unconditional: 1309, dependent: 22, dependent conditional: 0, dependent unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1267, independent: 1249, independent conditional: 0, independent unconditional: 1249, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1267, independent: 1249, independent conditional: 0, independent unconditional: 1249, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 18, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 70, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 70, dependent conditional: 0, dependent unconditional: 70, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1331, independent: 60, independent conditional: 0, independent unconditional: 60, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 1267, unknown conditional: 0, unknown unconditional: 1267] , Statistics on independence cache: Total cache size (in pairs): 2030, Positive cache size: 2012, Positive conditional cache size: 0, Positive unconditional cache size: 2012, Negative cache size: 18, Negative conditional cache size: 0, Negative unconditional cache size: 18, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1 - TimeoutResultAtElement [Line: 120]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (12states, 0/31 universal loopers) in iteration 21,while PetriNetUnfolder was constructing finite prefix that currently has 1201832 conditions, 54495 events (39326/54494 cut-off events. For 23728/23728 co-relation queries the response was YES. Maximal size of possible extension queue 2044. Compared 337978 event pairs, 84 based on Foata normal form. 0/40915 useless extension candidates. Maximal degree in co-relation 1194607. Up to 54377 conditions per place.). - TimeoutResultAtElement [Line: 110]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (12states, 0/31 universal loopers) in iteration 21,while PetriNetUnfolder was constructing finite prefix that currently has 1201832 conditions, 54495 events (39326/54494 cut-off events. For 23728/23728 co-relation queries the response was YES. Maximal size of possible extension queue 2044. Compared 337978 event pairs, 84 based on Foata normal form. 0/40915 useless extension candidates. Maximal degree in co-relation 1194607. Up to 54377 conditions per place.). - TimeoutResultAtElement [Line: 112]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (12states, 0/31 universal loopers) in iteration 21,while PetriNetUnfolder was constructing finite prefix that currently has 1201832 conditions, 54495 events (39326/54494 cut-off events. For 23728/23728 co-relation queries the response was YES. Maximal size of possible extension queue 2044. Compared 337978 event pairs, 84 based on Foata normal form. 0/40915 useless extension candidates. Maximal degree in co-relation 1194607. Up to 54377 conditions per place.). - TimeoutResultAtElement [Line: 111]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (12states, 0/31 universal loopers) in iteration 21,while PetriNetUnfolder was constructing finite prefix that currently has 1201832 conditions, 54495 events (39326/54494 cut-off events. For 23728/23728 co-relation queries the response was YES. Maximal size of possible extension queue 2044. Compared 337978 event pairs, 84 based on Foata normal form. 0/40915 useless extension candidates. Maximal degree in co-relation 1194607. Up to 54377 conditions per place.). - TimeoutResultAtElement [Line: 113]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (12states, 0/31 universal loopers) in iteration 21,while PetriNetUnfolder was constructing finite prefix that currently has 1201832 conditions, 54495 events (39326/54494 cut-off events. For 23728/23728 co-relation queries the response was YES. Maximal size of possible extension queue 2044. Compared 337978 event pairs, 84 based on Foata normal form. 0/40915 useless extension candidates. Maximal degree in co-relation 1194607. Up to 54377 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 188 locations, 5 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 5.1s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 823.0s, OverallIterations: 21, TraceHistogramMax: 2, PathProgramHistogramMax: 17, EmptinessCheckTime: 0.0s, AutomataDifference: 761.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.3s, HoareTripleCheckerStatistics: 36 mSolverCounterUnknown, 6456 SdHoareTripleChecker+Valid, 20.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6456 mSDsluCounter, 209 SdHoareTripleChecker+Invalid, 18.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1332 IncrementalHoareTripleChecker+Unchecked, 180 mSDsCounter, 792 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 14168 IncrementalHoareTripleChecker+Invalid, 16328 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 792 mSolverCounterUnsat, 29 mSDtfsCounter, 14168 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1534 GetRequests, 800 SyntacticMatches, 44 SemanticMatches, 690 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 14874 ImplicationChecksByTransitivity, 86.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=402996occurred in iteration=20, InterpolantAutomatonStates: 421, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 1270782 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 44.8s InterpolantComputationTime, 1118 NumberOfCodeBlocks, 1118 NumberOfCodeBlocksAsserted, 49 NumberOfCheckSat, 1508 ConstructedInterpolants, 45 QuantifiedInterpolants, 12937 SizeOfPredicates, 181 NumberOfNonLiveVariables, 4408 ConjunctsInSsa, 362 ConjunctsInUnsatCore, 50 InterpolantComputations, 12 PerfectInterpolantSequences, 155/226 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown