/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 16:25:46,602 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 16:25:46,604 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 16:25:46,632 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 16:25:46,633 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 16:25:46,635 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 16:25:46,638 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 16:25:46,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 16:25:46,643 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 16:25:46,647 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 16:25:46,647 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 16:25:46,649 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 16:25:46,649 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 16:25:46,651 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 16:25:46,651 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 16:25:46,654 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 16:25:46,654 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 16:25:46,655 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 16:25:46,656 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 16:25:46,660 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 16:25:46,661 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 16:25:46,661 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 16:25:46,662 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 16:25:46,663 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 16:25:46,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 16:25:46,668 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 16:25:46,668 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 16:25:46,669 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 16:25:46,669 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 16:25:46,670 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 16:25:46,670 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 16:25:46,675 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 16:25:46,676 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 16:25:46,676 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 16:25:46,677 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 16:25:46,677 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 16:25:46,677 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 16:25:46,678 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 16:25:46,678 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 16:25:46,678 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 16:25:46,679 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 16:25:46,682 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 16:25:46,706 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 16:25:46,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 16:25:46,707 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 16:25:46,707 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 16:25:46,708 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 16:25:46,708 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 16:25:46,709 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 16:25:46,709 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 16:25:46,709 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 16:25:46,709 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 16:25:46,709 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 16:25:46,710 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 16:25:46,710 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 16:25:46,710 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 16:25:46,710 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 16:25:46,710 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 16:25:46,710 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 16:25:46,710 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 16:25:46,710 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 16:25:46,710 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 16:25:46,710 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 16:25:46,711 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 16:25:46,711 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 16:25:46,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 16:25:46,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 16:25:46,711 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 16:25:46,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 16:25:46,711 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 16:25:46,711 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 16:25:46,711 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 16:25:46,711 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-12 16:25:46,977 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 16:25:46,993 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 16:25:46,995 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 16:25:46,996 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 16:25:46,998 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 16:25:46,999 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c [2022-12-12 16:25:47,977 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 16:25:48,181 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 16:25:48,182 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c [2022-12-12 16:25:48,186 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f13bb6c4/3319eb945c31412bad6ab0417650ced1/FLAG87d57363b [2022-12-12 16:25:48,212 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f13bb6c4/3319eb945c31412bad6ab0417650ced1 [2022-12-12 16:25:48,214 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 16:25:48,215 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 16:25:48,215 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 16:25:48,215 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 16:25:48,217 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 16:25:48,218 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 04:25:48" (1/1) ... [2022-12-12 16:25:48,218 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1968ceda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:25:48, skipping insertion in model container [2022-12-12 16:25:48,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 04:25:48" (1/1) ... [2022-12-12 16:25:48,222 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 16:25:48,240 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 16:25:48,362 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 16:25:48,365 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 16:25:48,366 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 16:25:48,367 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 16:25:48,368 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 16:25:48,369 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 16:25:48,369 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 16:25:48,374 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 16:25:48,376 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 16:25:48,378 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 16:25:48,387 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-queue-add-3.wvr.c[3412,3425] [2022-12-12 16:25:48,399 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 16:25:48,404 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 16:25:48,417 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 16:25:48,418 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 16:25:48,418 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 16:25:48,420 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 16:25:48,421 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 16:25:48,423 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 16:25:48,423 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 16:25:48,428 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 16:25:48,430 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 16:25:48,431 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 16:25:48,440 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-queue-add-3.wvr.c[3412,3425] [2022-12-12 16:25:48,442 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 16:25:48,454 INFO L208 MainTranslator]: Completed translation [2022-12-12 16:25:48,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:25:48 WrapperNode [2022-12-12 16:25:48,454 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 16:25:48,456 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 16:25:48,456 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 16:25:48,456 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 16:25:48,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:25:48" (1/1) ... [2022-12-12 16:25:48,477 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:25:48" (1/1) ... [2022-12-12 16:25:48,504 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 245 [2022-12-12 16:25:48,504 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 16:25:48,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 16:25:48,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 16:25:48,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 16:25:48,512 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:25:48" (1/1) ... [2022-12-12 16:25:48,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:25:48" (1/1) ... [2022-12-12 16:25:48,524 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:25:48" (1/1) ... [2022-12-12 16:25:48,525 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:25:48" (1/1) ... [2022-12-12 16:25:48,530 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:25:48" (1/1) ... [2022-12-12 16:25:48,533 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:25:48" (1/1) ... [2022-12-12 16:25:48,533 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:25:48" (1/1) ... [2022-12-12 16:25:48,534 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:25:48" (1/1) ... [2022-12-12 16:25:48,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 16:25:48,537 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 16:25:48,537 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 16:25:48,537 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 16:25:48,537 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:25:48" (1/1) ... [2022-12-12 16:25:48,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 16:25:48,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:25:48,576 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 16:25:48,582 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 16:25:48,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 16:25:48,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 16:25:48,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 16:25:48,605 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-12 16:25:48,605 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-12 16:25:48,605 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-12 16:25:48,606 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-12 16:25:48,606 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-12 16:25:48,606 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-12 16:25:48,606 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-12 16:25:48,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 16:25:48,606 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-12 16:25:48,606 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-12 16:25:48,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-12 16:25:48,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 16:25:48,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 16:25:48,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 16:25:48,608 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 16:25:48,723 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 16:25:48,724 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 16:25:49,066 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 16:25:49,167 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 16:25:49,167 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2022-12-12 16:25:49,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 04:25:49 BoogieIcfgContainer [2022-12-12 16:25:49,170 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 16:25:49,173 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 16:25:49,173 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 16:25:49,176 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 16:25:49,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 04:25:48" (1/3) ... [2022-12-12 16:25:49,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16caee61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 04:25:49, skipping insertion in model container [2022-12-12 16:25:49,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:25:48" (2/3) ... [2022-12-12 16:25:49,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16caee61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 04:25:49, skipping insertion in model container [2022-12-12 16:25:49,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 04:25:49" (3/3) ... [2022-12-12 16:25:49,177 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-3.wvr.c [2022-12-12 16:25:49,189 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 16:25:49,190 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 16:25:49,190 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 16:25:49,243 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-12 16:25:49,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 194 transitions, 412 flow [2022-12-12 16:25:49,352 INFO L130 PetriNetUnfolder]: 18/191 cut-off events. [2022-12-12 16:25:49,353 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 16:25:49,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 191 events. 18/191 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 111 event pairs, 0 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 155. Up to 3 conditions per place. [2022-12-12 16:25:49,357 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 194 transitions, 412 flow [2022-12-12 16:25:49,363 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 173 places, 181 transitions, 380 flow [2022-12-12 16:25:49,364 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-12 16:25:49,376 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 173 places, 181 transitions, 380 flow [2022-12-12 16:25:49,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 181 transitions, 380 flow [2022-12-12 16:25:49,402 INFO L130 PetriNetUnfolder]: 18/181 cut-off events. [2022-12-12 16:25:49,402 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 16:25:49,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 181 events. 18/181 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 109 event pairs, 0 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 155. Up to 3 conditions per place. [2022-12-12 16:25:49,405 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 173 places, 181 transitions, 380 flow [2022-12-12 16:25:49,405 INFO L226 LiptonReduction]: Number of co-enabled transitions 1456 [2022-12-12 16:25:55,971 INFO L241 LiptonReduction]: Total number of compositions: 152 [2022-12-12 16:25:55,981 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 16:25:55,985 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;@3512fc1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 16:25:55,985 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-12 16:25:55,990 INFO L130 PetriNetUnfolder]: 6/27 cut-off events. [2022-12-12 16:25:55,991 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 16:25:55,991 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:25:55,991 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] [2022-12-12 16:25:55,992 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 16:25:55,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:25:55,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1071479920, now seen corresponding path program 1 times [2022-12-12 16:25:56,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:25:56,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065667988] [2022-12-12 16:25:56,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:25:56,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:25:56,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:25:56,191 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 16:25:56,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:25:56,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065667988] [2022-12-12 16:25:56,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065667988] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 16:25:56,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 16:25:56,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-12 16:25:56,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564068360] [2022-12-12 16:25:56,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:25:56,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-12 16:25:56,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:25:56,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-12 16:25:56,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-12 16:25:56,229 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2022-12-12 16:25:56,230 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 74 flow. Second operand has 2 states, 2 states have (on average 12.0) internal successors, (24), 2 states have internal predecessors, (24), 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 16:25:56,230 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:25:56,230 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2022-12-12 16:25:56,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:25:56,368 INFO L130 PetriNetUnfolder]: 321/458 cut-off events. [2022-12-12 16:25:56,368 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2022-12-12 16:25:56,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 959 conditions, 458 events. 321/458 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1494 event pairs, 166 based on Foata normal form. 0/294 useless extension candidates. Maximal degree in co-relation 732. Up to 449 conditions per place. [2022-12-12 16:25:56,372 INFO L137 encePairwiseOnDemand]: 27/28 looper letters, 24 selfloop transitions, 0 changer transitions 0/27 dead transitions. [2022-12-12 16:25:56,372 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 120 flow [2022-12-12 16:25:56,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-12 16:25:56,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-12 16:25:56,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 31 transitions. [2022-12-12 16:25:56,383 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2022-12-12 16:25:56,384 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 74 flow. Second operand 2 states and 31 transitions. [2022-12-12 16:25:56,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 27 transitions, 120 flow [2022-12-12 16:25:56,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 27 transitions, 108 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-12 16:25:56,388 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 60 flow [2022-12-12 16:25:56,390 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=60, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2022-12-12 16:25:56,393 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, -5 predicate places. [2022-12-12 16:25:56,393 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 60 flow [2022-12-12 16:25:56,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.0) internal successors, (24), 2 states have internal predecessors, (24), 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 16:25:56,394 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:25:56,394 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] [2022-12-12 16:25:56,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 16:25:56,395 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 16:25:56,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:25:56,398 INFO L85 PathProgramCache]: Analyzing trace with hash 83975277, now seen corresponding path program 1 times [2022-12-12 16:25:56,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:25:56,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877587443] [2022-12-12 16:25:56,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:25:56,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:25:56,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:25:56,635 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 16:25:56,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:25:56,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877587443] [2022-12-12 16:25:56,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877587443] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 16:25:56,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 16:25:56,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 16:25:56,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715424028] [2022-12-12 16:25:56,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:25:56,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 16:25:56,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:25:56,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 16:25:56,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-12 16:25:56,637 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2022-12-12 16:25:56,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 60 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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 16:25:56,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:25:56,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2022-12-12 16:25:56,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:25:56,750 INFO L130 PetriNetUnfolder]: 330/496 cut-off events. [2022-12-12 16:25:56,750 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-12 16:25:56,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1001 conditions, 496 events. 330/496 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1628 event pairs, 168 based on Foata normal form. 32/366 useless extension candidates. Maximal degree in co-relation 998. Up to 449 conditions per place. [2022-12-12 16:25:56,753 INFO L137 encePairwiseOnDemand]: 21/28 looper letters, 23 selfloop transitions, 2 changer transitions 21/49 dead transitions. [2022-12-12 16:25:56,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 49 transitions, 202 flow [2022-12-12 16:25:56,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 16:25:56,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 16:25:56,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 67 transitions. [2022-12-12 16:25:56,754 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2022-12-12 16:25:56,754 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 60 flow. Second operand 5 states and 67 transitions. [2022-12-12 16:25:56,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 49 transitions, 202 flow [2022-12-12 16:25:56,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 49 transitions, 202 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-12 16:25:56,756 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 86 flow [2022-12-12 16:25:56,756 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=86, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2022-12-12 16:25:56,756 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2022-12-12 16:25:56,757 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 86 flow [2022-12-12 16:25:56,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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 16:25:56,757 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:25:56,757 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] [2022-12-12 16:25:56,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-12 16:25:56,757 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 16:25:56,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:25:56,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1572002015, now seen corresponding path program 1 times [2022-12-12 16:25:56,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:25:56,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806905905] [2022-12-12 16:25:56,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:25:56,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:25:56,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:25:56,866 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 16:25:56,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:25:56,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806905905] [2022-12-12 16:25:56,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806905905] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 16:25:56,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 16:25:56,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 16:25:56,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834795753] [2022-12-12 16:25:56,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:25:56,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 16:25:56,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:25:56,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 16:25:56,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-12 16:25:56,868 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2022-12-12 16:25:56,868 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 86 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 16:25:56,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:25:56,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2022-12-12 16:25:56,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:25:56,962 INFO L130 PetriNetUnfolder]: 368/551 cut-off events. [2022-12-12 16:25:56,963 INFO L131 PetriNetUnfolder]: For 412/412 co-relation queries the response was YES. [2022-12-12 16:25:56,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1578 conditions, 551 events. 368/551 cut-off events. For 412/412 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1948 event pairs, 194 based on Foata normal form. 24/405 useless extension candidates. Maximal degree in co-relation 1571. Up to 450 conditions per place. [2022-12-12 16:25:56,965 INFO L137 encePairwiseOnDemand]: 21/28 looper letters, 24 selfloop transitions, 2 changer transitions 12/41 dead transitions. [2022-12-12 16:25:56,965 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 41 transitions, 206 flow [2022-12-12 16:25:56,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 16:25:56,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 16:25:56,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 53 transitions. [2022-12-12 16:25:56,967 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2022-12-12 16:25:56,967 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 86 flow. Second operand 4 states and 53 transitions. [2022-12-12 16:25:56,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 41 transitions, 206 flow [2022-12-12 16:25:56,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 41 transitions, 186 flow, removed 9 selfloop flow, removed 2 redundant places. [2022-12-12 16:25:56,968 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 94 flow [2022-12-12 16:25:56,968 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2022-12-12 16:25:56,969 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2022-12-12 16:25:56,969 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 94 flow [2022-12-12 16:25:56,969 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 16:25:56,969 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:25:56,969 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] [2022-12-12 16:25:56,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-12 16:25:56,969 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 16:25:56,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:25:56,969 INFO L85 PathProgramCache]: Analyzing trace with hash 2058117341, now seen corresponding path program 1 times [2022-12-12 16:25:56,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:25:56,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097649851] [2022-12-12 16:25:56,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:25:56,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:25:57,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:25:57,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 16:25:57,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:25:57,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097649851] [2022-12-12 16:25:57,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097649851] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 16:25:57,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 16:25:57,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-12 16:25:57,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907128016] [2022-12-12 16:25:57,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:25:57,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 16:25:57,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:25:57,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 16:25:57,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 16:25:57,098 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2022-12-12 16:25:57,098 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 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 16:25:57,098 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:25:57,098 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2022-12-12 16:25:57,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:25:57,190 INFO L130 PetriNetUnfolder]: 340/486 cut-off events. [2022-12-12 16:25:57,190 INFO L131 PetriNetUnfolder]: For 145/169 co-relation queries the response was YES. [2022-12-12 16:25:57,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1367 conditions, 486 events. 340/486 cut-off events. For 145/169 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1455 event pairs, 48 based on Foata normal form. 10/329 useless extension candidates. Maximal degree in co-relation 1359. Up to 390 conditions per place. [2022-12-12 16:25:57,193 INFO L137 encePairwiseOnDemand]: 23/28 looper letters, 33 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2022-12-12 16:25:57,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 39 transitions, 198 flow [2022-12-12 16:25:57,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 16:25:57,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 16:25:57,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2022-12-12 16:25:57,194 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2022-12-12 16:25:57,194 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 94 flow. Second operand 3 states and 45 transitions. [2022-12-12 16:25:57,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 39 transitions, 198 flow [2022-12-12 16:25:57,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 39 transitions, 194 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-12 16:25:57,195 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 115 flow [2022-12-12 16:25:57,196 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2022-12-12 16:25:57,199 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 4 predicate places. [2022-12-12 16:25:57,200 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 115 flow [2022-12-12 16:25:57,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 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 16:25:57,200 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:25:57,200 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] [2022-12-12 16:25:57,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-12 16:25:57,200 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 16:25:57,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:25:57,200 INFO L85 PathProgramCache]: Analyzing trace with hash -2079543081, now seen corresponding path program 2 times [2022-12-12 16:25:57,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:25:57,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335346806] [2022-12-12 16:25:57,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:25:57,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:25:57,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:25:57,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 16:25:57,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:25:57,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335346806] [2022-12-12 16:25:57,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335346806] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 16:25:57,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 16:25:57,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-12 16:25:57,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435151268] [2022-12-12 16:25:57,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:25:57,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 16:25:57,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:25:57,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 16:25:57,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-12 16:25:57,441 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 28 [2022-12-12 16:25:57,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 115 flow. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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 16:25:57,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:25:57,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 28 [2022-12-12 16:25:57,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:25:57,575 INFO L130 PetriNetUnfolder]: 499/749 cut-off events. [2022-12-12 16:25:57,575 INFO L131 PetriNetUnfolder]: For 397/445 co-relation queries the response was YES. [2022-12-12 16:25:57,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2399 conditions, 749 events. 499/749 cut-off events. For 397/445 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2799 event pairs, 123 based on Foata normal form. 2/528 useless extension candidates. Maximal degree in co-relation 2390. Up to 302 conditions per place. [2022-12-12 16:25:57,579 INFO L137 encePairwiseOnDemand]: 21/28 looper letters, 65 selfloop transitions, 8 changer transitions 2/77 dead transitions. [2022-12-12 16:25:57,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 77 transitions, 449 flow [2022-12-12 16:25:57,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 16:25:57,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 16:25:57,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 80 transitions. [2022-12-12 16:25:57,580 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2022-12-12 16:25:57,580 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 115 flow. Second operand 6 states and 80 transitions. [2022-12-12 16:25:57,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 77 transitions, 449 flow [2022-12-12 16:25:57,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 77 transitions, 398 flow, removed 22 selfloop flow, removed 2 redundant places. [2022-12-12 16:25:57,582 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 158 flow [2022-12-12 16:25:57,582 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=158, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2022-12-12 16:25:57,583 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 10 predicate places. [2022-12-12 16:25:57,583 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 158 flow [2022-12-12 16:25:57,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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 16:25:57,583 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:25:57,583 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] [2022-12-12 16:25:57,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-12 16:25:57,583 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 16:25:57,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:25:57,583 INFO L85 PathProgramCache]: Analyzing trace with hash 345831699, now seen corresponding path program 1 times [2022-12-12 16:25:57,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:25:57,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529032258] [2022-12-12 16:25:57,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:25:57,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:25:57,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:25:57,670 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 16:25:57,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:25:57,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529032258] [2022-12-12 16:25:57,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529032258] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 16:25:57,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 16:25:57,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-12 16:25:57,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070358492] [2022-12-12 16:25:57,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:25:57,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 16:25:57,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:25:57,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 16:25:57,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 16:25:57,671 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2022-12-12 16:25:57,672 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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 16:25:57,672 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:25:57,672 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2022-12-12 16:25:57,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:25:57,766 INFO L130 PetriNetUnfolder]: 328/511 cut-off events. [2022-12-12 16:25:57,766 INFO L131 PetriNetUnfolder]: For 329/334 co-relation queries the response was YES. [2022-12-12 16:25:57,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1618 conditions, 511 events. 328/511 cut-off events. For 329/334 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1644 event pairs, 92 based on Foata normal form. 9/426 useless extension candidates. Maximal degree in co-relation 1607. Up to 496 conditions per place. [2022-12-12 16:25:57,768 INFO L137 encePairwiseOnDemand]: 24/28 looper letters, 34 selfloop transitions, 3 changer transitions 0/40 dead transitions. [2022-12-12 16:25:57,768 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 40 transitions, 233 flow [2022-12-12 16:25:57,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 16:25:57,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 16:25:57,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2022-12-12 16:25:57,769 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2022-12-12 16:25:57,769 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 158 flow. Second operand 3 states and 41 transitions. [2022-12-12 16:25:57,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 40 transitions, 233 flow [2022-12-12 16:25:57,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 40 transitions, 221 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-12-12 16:25:57,771 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 146 flow [2022-12-12 16:25:57,771 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2022-12-12 16:25:57,771 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 11 predicate places. [2022-12-12 16:25:57,771 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 146 flow [2022-12-12 16:25:57,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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 16:25:57,771 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:25:57,771 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] [2022-12-12 16:25:57,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-12 16:25:57,772 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 16:25:57,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:25:57,772 INFO L85 PathProgramCache]: Analyzing trace with hash -2139109842, now seen corresponding path program 1 times [2022-12-12 16:25:57,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:25:57,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737113355] [2022-12-12 16:25:57,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:25:57,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:25:57,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:25:57,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:25:57,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:25:57,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737113355] [2022-12-12 16:25:57,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737113355] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:25:57,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523956984] [2022-12-12 16:25:57,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:25:57,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:25:57,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:25:57,883 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 16:25:57,884 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 16:25:57,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:25:57,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 16:25:57,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:25:58,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:25:58,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:25:58,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:25:58,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523956984] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:25:58,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:25:58,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-12-12 16:25:58,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923969299] [2022-12-12 16:25:58,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:25:58,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-12 16:25:58,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:25:58,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-12 16:25:58,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-12-12 16:25:58,113 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2022-12-12 16:25:58,113 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 146 flow. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 12 states have internal predecessors, (68), 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 16:25:58,113 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:25:58,113 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2022-12-12 16:25:58,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:25:58,292 INFO L130 PetriNetUnfolder]: 507/830 cut-off events. [2022-12-12 16:25:58,292 INFO L131 PetriNetUnfolder]: For 731/741 co-relation queries the response was YES. [2022-12-12 16:25:58,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2636 conditions, 830 events. 507/830 cut-off events. For 731/741 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3362 event pairs, 214 based on Foata normal form. 50/746 useless extension candidates. Maximal degree in co-relation 2624. Up to 508 conditions per place. [2022-12-12 16:25:58,296 INFO L137 encePairwiseOnDemand]: 23/28 looper letters, 58 selfloop transitions, 5 changer transitions 2/68 dead transitions. [2022-12-12 16:25:58,297 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 68 transitions, 401 flow [2022-12-12 16:25:58,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 16:25:58,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 16:25:58,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 73 transitions. [2022-12-12 16:25:58,299 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2022-12-12 16:25:58,299 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 146 flow. Second operand 6 states and 73 transitions. [2022-12-12 16:25:58,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 68 transitions, 401 flow [2022-12-12 16:25:58,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 68 transitions, 391 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-12 16:25:58,302 INFO L231 Difference]: Finished difference. Result has 49 places, 38 transitions, 185 flow [2022-12-12 16:25:58,302 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=185, PETRI_PLACES=49, PETRI_TRANSITIONS=38} [2022-12-12 16:25:58,303 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 17 predicate places. [2022-12-12 16:25:58,303 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 38 transitions, 185 flow [2022-12-12 16:25:58,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 12 states have internal predecessors, (68), 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 16:25:58,303 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:25:58,303 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] [2022-12-12 16:25:58,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-12 16:25:58,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:25:58,508 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 16:25:58,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:25:58,509 INFO L85 PathProgramCache]: Analyzing trace with hash -2043296643, now seen corresponding path program 2 times [2022-12-12 16:25:58,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:25:58,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132927246] [2022-12-12 16:25:58,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:25:58,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:25:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:25:58,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 16:25:58,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:25:58,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132927246] [2022-12-12 16:25:58,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132927246] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 16:25:58,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 16:25:58,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 16:25:58,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863551378] [2022-12-12 16:25:58,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:25:58,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 16:25:58,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:25:58,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 16:25:58,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-12 16:25:58,682 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2022-12-12 16:25:58,683 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 38 transitions, 185 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 16:25:58,683 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:25:58,683 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2022-12-12 16:25:58,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:25:58,875 INFO L130 PetriNetUnfolder]: 907/1513 cut-off events. [2022-12-12 16:25:58,875 INFO L131 PetriNetUnfolder]: For 1405/1415 co-relation queries the response was YES. [2022-12-12 16:25:58,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4919 conditions, 1513 events. 907/1513 cut-off events. For 1405/1415 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 7368 event pairs, 168 based on Foata normal form. 78/1333 useless extension candidates. Maximal degree in co-relation 4904. Up to 665 conditions per place. [2022-12-12 16:25:58,883 INFO L137 encePairwiseOnDemand]: 23/28 looper letters, 56 selfloop transitions, 11 changer transitions 0/70 dead transitions. [2022-12-12 16:25:58,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 70 transitions, 450 flow [2022-12-12 16:25:58,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 16:25:58,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 16:25:58,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2022-12-12 16:25:58,885 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2022-12-12 16:25:58,885 INFO L175 Difference]: Start difference. First operand has 49 places, 38 transitions, 185 flow. Second operand 4 states and 68 transitions. [2022-12-12 16:25:58,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 70 transitions, 450 flow [2022-12-12 16:25:58,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 70 transitions, 427 flow, removed 9 selfloop flow, removed 3 redundant places. [2022-12-12 16:25:58,888 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 266 flow [2022-12-12 16:25:58,888 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=266, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2022-12-12 16:25:58,890 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 19 predicate places. [2022-12-12 16:25:58,890 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 266 flow [2022-12-12 16:25:58,890 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 16:25:58,890 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:25:58,890 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] [2022-12-12 16:25:58,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-12 16:25:58,890 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 16:25:58,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:25:58,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1625908206, now seen corresponding path program 2 times [2022-12-12 16:25:58,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:25:58,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542834585] [2022-12-12 16:25:58,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:25:58,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:25:58,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:25:59,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:25:59,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:25:59,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542834585] [2022-12-12 16:25:59,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542834585] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:25:59,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303157824] [2022-12-12 16:25:59,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 16:25:59,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:25:59,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:25:59,492 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 16:25:59,494 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 16:25:59,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 16:25:59,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:25:59,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-12 16:25:59,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:25:59,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 16:25:59,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 16:25:59,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-12-12 16:25:59,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 16:25:59,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:25:59,863 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:25:59,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2022-12-12 16:25:59,868 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 18 [2022-12-12 16:25:59,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:25:59,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303157824] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:25:59,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:25:59,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 19 [2022-12-12 16:25:59,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041579439] [2022-12-12 16:25:59,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:25:59,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 16:25:59,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:25:59,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 16:25:59,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=325, Unknown=2, NotChecked=0, Total=380 [2022-12-12 16:25:59,944 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 28 [2022-12-12 16:25:59,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 266 flow. Second operand has 20 states, 20 states have (on average 4.8) internal successors, (96), 20 states have internal predecessors, (96), 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 16:25:59,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:25:59,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 28 [2022-12-12 16:25:59,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:26:00,623 INFO L130 PetriNetUnfolder]: 1083/1797 cut-off events. [2022-12-12 16:26:00,623 INFO L131 PetriNetUnfolder]: For 2592/2619 co-relation queries the response was YES. [2022-12-12 16:26:00,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6881 conditions, 1797 events. 1083/1797 cut-off events. For 2592/2619 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 8773 event pairs, 160 based on Foata normal form. 27/1538 useless extension candidates. Maximal degree in co-relation 6865. Up to 1107 conditions per place. [2022-12-12 16:26:00,633 INFO L137 encePairwiseOnDemand]: 19/28 looper letters, 91 selfloop transitions, 22 changer transitions 0/115 dead transitions. [2022-12-12 16:26:00,634 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 115 transitions, 797 flow [2022-12-12 16:26:00,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-12 16:26:00,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-12 16:26:00,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 117 transitions. [2022-12-12 16:26:00,634 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3482142857142857 [2022-12-12 16:26:00,635 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 266 flow. Second operand 12 states and 117 transitions. [2022-12-12 16:26:00,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 115 transitions, 797 flow [2022-12-12 16:26:00,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 115 transitions, 773 flow, removed 12 selfloop flow, removed 0 redundant places. [2022-12-12 16:26:00,638 INFO L231 Difference]: Finished difference. Result has 67 places, 57 transitions, 399 flow [2022-12-12 16:26:00,638 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=399, PETRI_PLACES=67, PETRI_TRANSITIONS=57} [2022-12-12 16:26:00,639 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 35 predicate places. [2022-12-12 16:26:00,639 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 57 transitions, 399 flow [2022-12-12 16:26:00,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.8) internal successors, (96), 20 states have internal predecessors, (96), 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 16:26:00,639 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:26:00,639 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] [2022-12-12 16:26:00,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-12 16:26:00,844 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,SelfDestructingSolverStorable8 [2022-12-12 16:26:00,845 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 16:26:00,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:26:00,845 INFO L85 PathProgramCache]: Analyzing trace with hash -742261678, now seen corresponding path program 3 times [2022-12-12 16:26:00,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:26:00,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075807836] [2022-12-12 16:26:00,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:26:00,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:26:00,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:26:01,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:26:01,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:26:01,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075807836] [2022-12-12 16:26:01,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075807836] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:26:01,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678388201] [2022-12-12 16:26:01,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 16:26:01,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:26:01,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:26:01,382 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 16:26:01,384 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 16:26:01,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 16:26:01,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:26:01,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-12 16:26:01,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:26:01,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 16:26:01,761 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 18 treesize of output 20 [2022-12-12 16:26:01,803 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 19 treesize of output 7 [2022-12-12 16:26:01,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:26:01,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:26:01,931 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:26:01,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2022-12-12 16:26:01,935 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 18 [2022-12-12 16:26:02,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:26:02,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678388201] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:26:02,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:26:02,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-12-12 16:26:02,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515252185] [2022-12-12 16:26:02,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:26:02,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-12 16:26:02,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:26:02,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-12 16:26:02,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-12-12 16:26:02,183 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 28 [2022-12-12 16:26:02,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 57 transitions, 399 flow. Second operand has 25 states, 25 states have (on average 4.16) internal successors, (104), 25 states have internal predecessors, (104), 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 16:26:02,183 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:26:02,183 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 28 [2022-12-12 16:26:02,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:26:04,239 INFO L130 PetriNetUnfolder]: 3402/5353 cut-off events. [2022-12-12 16:26:04,240 INFO L131 PetriNetUnfolder]: For 12769/12814 co-relation queries the response was YES. [2022-12-12 16:26:04,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22050 conditions, 5353 events. 3402/5353 cut-off events. For 12769/12814 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 30550 event pairs, 254 based on Foata normal form. 151/4934 useless extension candidates. Maximal degree in co-relation 22029. Up to 1774 conditions per place. [2022-12-12 16:26:04,276 INFO L137 encePairwiseOnDemand]: 16/28 looper letters, 256 selfloop transitions, 93 changer transitions 0/351 dead transitions. [2022-12-12 16:26:04,277 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 351 transitions, 2848 flow [2022-12-12 16:26:04,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-12 16:26:04,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-12-12 16:26:04,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 310 transitions. [2022-12-12 16:26:04,279 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3817733990147783 [2022-12-12 16:26:04,279 INFO L175 Difference]: Start difference. First operand has 67 places, 57 transitions, 399 flow. Second operand 29 states and 310 transitions. [2022-12-12 16:26:04,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 351 transitions, 2848 flow [2022-12-12 16:26:04,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 351 transitions, 2752 flow, removed 41 selfloop flow, removed 3 redundant places. [2022-12-12 16:26:04,294 INFO L231 Difference]: Finished difference. Result has 111 places, 140 transitions, 1419 flow [2022-12-12 16:26:04,295 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1419, PETRI_PLACES=111, PETRI_TRANSITIONS=140} [2022-12-12 16:26:04,295 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 79 predicate places. [2022-12-12 16:26:04,295 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 140 transitions, 1419 flow [2022-12-12 16:26:04,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.16) internal successors, (104), 25 states have internal predecessors, (104), 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 16:26:04,295 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:26:04,296 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] [2022-12-12 16:26:04,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-12 16:26:04,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:26:04,501 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 1 more)] === [2022-12-12 16:26:04,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:26:04,502 INFO L85 PathProgramCache]: Analyzing trace with hash 2058327290, now seen corresponding path program 4 times [2022-12-12 16:26:04,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:26:04,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208623275] [2022-12-12 16:26:04,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:26:04,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:26:04,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:26:05,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:26:05,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:26:05,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208623275] [2022-12-12 16:26:05,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208623275] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:26:05,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944779923] [2022-12-12 16:26:05,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 16:26:05,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:26:05,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:26:05,137 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 16:26:05,138 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 16:26:05,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 16:26:05,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:26:05,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-12 16:26:05,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:26:05,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 16:26:05,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 16:26:05,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 16:26:05,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 16:26:05,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-12-12 16:26:05,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:26:05,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:26:05,622 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_396 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_396) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 0))) is different from false [2022-12-12 16:26:05,717 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:26:05,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 167 treesize of output 155 [2022-12-12 16:26:05,721 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 138 treesize of output 114 [2022-12-12 16:26:05,724 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 114 treesize of output 102 [2022-12-12 16:26:05,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:26:05,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944779923] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:26:05,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:26:05,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-12-12 16:26:05,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451766073] [2022-12-12 16:26:05,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:26:05,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-12 16:26:05,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:26:05,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-12 16:26:05,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=602, Unknown=2, NotChecked=50, Total=756 [2022-12-12 16:26:05,947 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 28 [2022-12-12 16:26:05,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 140 transitions, 1419 flow. Second operand has 28 states, 28 states have (on average 4.0) internal successors, (112), 28 states have internal predecessors, (112), 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 16:26:05,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:26:05,948 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 28 [2022-12-12 16:26:05,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:26:06,898 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_~q1_front~0 4) c_~q1~0.offset))) (and (forall ((v_ArrVal_395 (Array Int Int)) (v_ArrVal_396 (Array Int Int))) (not (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_395) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_396) c_~q1~0.base) .cse0) 0))) (forall ((v_ArrVal_396 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_396) c_~q1~0.base) .cse0) 0))))) is different from false [2022-12-12 16:26:08,416 INFO L130 PetriNetUnfolder]: 5075/7916 cut-off events. [2022-12-12 16:26:08,416 INFO L131 PetriNetUnfolder]: For 50977/51021 co-relation queries the response was YES. [2022-12-12 16:26:08,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47261 conditions, 7916 events. 5075/7916 cut-off events. For 50977/51021 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 47435 event pairs, 423 based on Foata normal form. 169/7318 useless extension candidates. Maximal degree in co-relation 47222. Up to 2739 conditions per place. [2022-12-12 16:26:08,472 INFO L137 encePairwiseOnDemand]: 15/28 looper letters, 267 selfloop transitions, 147 changer transitions 1/417 dead transitions. [2022-12-12 16:26:08,472 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 417 transitions, 4623 flow [2022-12-12 16:26:08,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-12 16:26:08,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-12-12 16:26:08,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 313 transitions. [2022-12-12 16:26:08,474 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.36059907834101385 [2022-12-12 16:26:08,474 INFO L175 Difference]: Start difference. First operand has 111 places, 140 transitions, 1419 flow. Second operand 31 states and 313 transitions. [2022-12-12 16:26:08,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 417 transitions, 4623 flow [2022-12-12 16:26:08,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 417 transitions, 4359 flow, removed 121 selfloop flow, removed 7 redundant places. [2022-12-12 16:26:08,734 INFO L231 Difference]: Finished difference. Result has 149 places, 212 transitions, 2679 flow [2022-12-12 16:26:08,735 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1229, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2679, PETRI_PLACES=149, PETRI_TRANSITIONS=212} [2022-12-12 16:26:08,735 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 117 predicate places. [2022-12-12 16:26:08,735 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 212 transitions, 2679 flow [2022-12-12 16:26:08,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.0) internal successors, (112), 28 states have internal predecessors, (112), 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 16:26:08,735 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:26:08,735 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] [2022-12-12 16:26:08,753 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 16:26:08,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:26:08,940 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 1 more)] === [2022-12-12 16:26:08,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:26:08,941 INFO L85 PathProgramCache]: Analyzing trace with hash 426059419, now seen corresponding path program 1 times [2022-12-12 16:26:08,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:26:08,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231213157] [2022-12-12 16:26:08,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:26:08,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:26:08,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:26:09,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 16:26:09,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:26:09,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231213157] [2022-12-12 16:26:09,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231213157] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:26:09,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019230284] [2022-12-12 16:26:09,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:26:09,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:26:09,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:26:09,047 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 16:26:09,052 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 16:26:09,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:26:09,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 16:26:09,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:26:09,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 16:26:09,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:26:09,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 16:26:09,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019230284] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:26:09,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:26:09,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-12 16:26:09,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609219956] [2022-12-12 16:26:09,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:26:09,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-12 16:26:09,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:26:09,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-12 16:26:09,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-12-12 16:26:09,254 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2022-12-12 16:26:09,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 212 transitions, 2679 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 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 16:26:09,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:26:09,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2022-12-12 16:26:09,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:26:10,815 INFO L130 PetriNetUnfolder]: 6651/10583 cut-off events. [2022-12-12 16:26:10,815 INFO L131 PetriNetUnfolder]: For 165166/165211 co-relation queries the response was YES. [2022-12-12 16:26:10,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77668 conditions, 10583 events. 6651/10583 cut-off events. For 165166/165211 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 68229 event pairs, 2567 based on Foata normal form. 405/10259 useless extension candidates. Maximal degree in co-relation 77617. Up to 7422 conditions per place. [2022-12-12 16:26:10,891 INFO L137 encePairwiseOnDemand]: 23/28 looper letters, 228 selfloop transitions, 12 changer transitions 124/367 dead transitions. [2022-12-12 16:26:10,892 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 367 transitions, 5429 flow [2022-12-12 16:26:10,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 16:26:10,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 16:26:10,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 74 transitions. [2022-12-12 16:26:10,893 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2022-12-12 16:26:10,893 INFO L175 Difference]: Start difference. First operand has 149 places, 212 transitions, 2679 flow. Second operand 6 states and 74 transitions. [2022-12-12 16:26:10,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 367 transitions, 5429 flow [2022-12-12 16:26:11,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 367 transitions, 4875 flow, removed 246 selfloop flow, removed 13 redundant places. [2022-12-12 16:26:11,773 INFO L231 Difference]: Finished difference. Result has 144 places, 214 transitions, 2514 flow [2022-12-12 16:26:11,773 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2372, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2514, PETRI_PLACES=144, PETRI_TRANSITIONS=214} [2022-12-12 16:26:11,774 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 112 predicate places. [2022-12-12 16:26:11,774 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 214 transitions, 2514 flow [2022-12-12 16:26:11,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 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 16:26:11,775 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:26:11,775 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 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 16:26:11,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-12 16:26:11,979 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,SelfDestructingSolverStorable11 [2022-12-12 16:26:11,979 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 1 more)] === [2022-12-12 16:26:11,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:26:11,980 INFO L85 PathProgramCache]: Analyzing trace with hash -459611016, now seen corresponding path program 5 times [2022-12-12 16:26:11,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:26:11,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156412585] [2022-12-12 16:26:11,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:26:11,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:26:12,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:26:12,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:26:12,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:26:12,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156412585] [2022-12-12 16:26:12,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156412585] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:26:12,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917338006] [2022-12-12 16:26:12,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 16:26:12,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:26:12,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:26:12,653 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 16:26:12,671 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 16:26:12,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-12 16:26:12,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:26:12,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-12 16:26:12,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:26:12,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 16:26:12,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 16:26:12,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-12-12 16:26:12,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-12 16:26:12,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:26:12,965 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:26:12,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2022-12-12 16:26:12,967 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 18 [2022-12-12 16:26:13,036 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-12 16:26:13,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917338006] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:26:13,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:26:13,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 19 [2022-12-12 16:26:13,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166712387] [2022-12-12 16:26:13,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:26:13,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 16:26:13,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:26:13,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 16:26:13,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=321, Unknown=7, NotChecked=0, Total=380 [2022-12-12 16:26:13,039 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 28 [2022-12-12 16:26:13,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 214 transitions, 2514 flow. Second operand has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 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 16:26:13,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:26:13,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 28 [2022-12-12 16:26:13,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:26:14,970 INFO L130 PetriNetUnfolder]: 6549/10678 cut-off events. [2022-12-12 16:26:14,970 INFO L131 PetriNetUnfolder]: For 161112/161204 co-relation queries the response was YES. [2022-12-12 16:26:15,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74246 conditions, 10678 events. 6549/10678 cut-off events. For 161112/161204 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 70273 event pairs, 1364 based on Foata normal form. 116/10103 useless extension candidates. Maximal degree in co-relation 74193. Up to 5495 conditions per place. [2022-12-12 16:26:15,042 INFO L137 encePairwiseOnDemand]: 19/28 looper letters, 198 selfloop transitions, 126 changer transitions 0/326 dead transitions. [2022-12-12 16:26:15,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 326 transitions, 4431 flow [2022-12-12 16:26:15,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-12 16:26:15,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-12 16:26:15,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 135 transitions. [2022-12-12 16:26:15,043 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.34438775510204084 [2022-12-12 16:26:15,043 INFO L175 Difference]: Start difference. First operand has 144 places, 214 transitions, 2514 flow. Second operand 14 states and 135 transitions. [2022-12-12 16:26:15,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 326 transitions, 4431 flow [2022-12-12 16:26:15,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 326 transitions, 4344 flow, removed 34 selfloop flow, removed 3 redundant places. [2022-12-12 16:26:15,931 INFO L231 Difference]: Finished difference. Result has 158 places, 240 transitions, 3221 flow [2022-12-12 16:26:15,931 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2443, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3221, PETRI_PLACES=158, PETRI_TRANSITIONS=240} [2022-12-12 16:26:15,932 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 126 predicate places. [2022-12-12 16:26:15,932 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 240 transitions, 3221 flow [2022-12-12 16:26:15,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 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 16:26:15,932 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:26:15,932 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 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 16:26:15,937 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 16:26:16,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:26:16,138 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 1 more)] === [2022-12-12 16:26:16,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:26:16,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1468698196, now seen corresponding path program 6 times [2022-12-12 16:26:16,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:26:16,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44433201] [2022-12-12 16:26:16,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:26:16,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:26:16,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:26:17,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:26:17,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:26:17,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44433201] [2022-12-12 16:26:17,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44433201] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:26:17,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277151898] [2022-12-12 16:26:17,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 16:26:17,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:26:17,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:26:17,149 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 16:26:17,210 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 16:26:17,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-12 16:26:17,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:26:17,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-12 16:26:17,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:26:17,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 16:26:17,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 16:26:17,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 16:26:17,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 16:26:17,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-12-12 16:26:17,600 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 16:26:17,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:26:17,731 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:26:17,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 167 treesize of output 155 [2022-12-12 16:26:17,735 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 138 treesize of output 126 [2022-12-12 16:26:17,738 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 126 treesize of output 102 [2022-12-12 16:26:17,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-12 16:26:17,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277151898] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:26:17,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:26:17,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 24 [2022-12-12 16:26:17,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378220355] [2022-12-12 16:26:17,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:26:17,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-12 16:26:17,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:26:17,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-12 16:26:17,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=516, Unknown=8, NotChecked=0, Total=600 [2022-12-12 16:26:17,832 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 28 [2022-12-12 16:26:17,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 240 transitions, 3221 flow. Second operand has 25 states, 25 states have (on average 4.28) internal successors, (107), 25 states have internal predecessors, (107), 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 16:26:17,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:26:17,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 28 [2022-12-12 16:26:17,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:26:19,900 INFO L130 PetriNetUnfolder]: 6630/10813 cut-off events. [2022-12-12 16:26:19,900 INFO L131 PetriNetUnfolder]: For 178122/178212 co-relation queries the response was YES. [2022-12-12 16:26:19,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78401 conditions, 10813 events. 6630/10813 cut-off events. For 178122/178212 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 72069 event pairs, 1046 based on Foata normal form. 106/10212 useless extension candidates. Maximal degree in co-relation 78346. Up to 4260 conditions per place. [2022-12-12 16:26:19,976 INFO L137 encePairwiseOnDemand]: 20/28 looper letters, 181 selfloop transitions, 137 changer transitions 4/324 dead transitions. [2022-12-12 16:26:19,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 324 transitions, 4713 flow [2022-12-12 16:26:19,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-12 16:26:19,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-12 16:26:19,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 132 transitions. [2022-12-12 16:26:19,978 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.336734693877551 [2022-12-12 16:26:19,978 INFO L175 Difference]: Start difference. First operand has 158 places, 240 transitions, 3221 flow. Second operand 14 states and 132 transitions. [2022-12-12 16:26:19,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 324 transitions, 4713 flow [2022-12-12 16:26:20,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 324 transitions, 4691 flow, removed 3 selfloop flow, removed 5 redundant places. [2022-12-12 16:26:20,954 INFO L231 Difference]: Finished difference. Result has 168 places, 252 transitions, 3740 flow [2022-12-12 16:26:20,954 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=3199, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3740, PETRI_PLACES=168, PETRI_TRANSITIONS=252} [2022-12-12 16:26:20,955 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 136 predicate places. [2022-12-12 16:26:20,955 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 252 transitions, 3740 flow [2022-12-12 16:26:20,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.28) internal successors, (107), 25 states have internal predecessors, (107), 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 16:26:20,955 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:26:20,955 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] [2022-12-12 16:26:20,959 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 16:26:21,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:26:21,160 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 1 more)] === [2022-12-12 16:26:21,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:26:21,160 INFO L85 PathProgramCache]: Analyzing trace with hash -113597437, now seen corresponding path program 2 times [2022-12-12 16:26:21,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:26:21,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638265241] [2022-12-12 16:26:21,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:26:21,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:26:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:26:21,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-12 16:26:21,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:26:21,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638265241] [2022-12-12 16:26:21,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638265241] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 16:26:21,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 16:26:21,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 16:26:21,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107452442] [2022-12-12 16:26:21,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:26:21,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 16:26:21,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:26:21,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 16:26:21,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-12 16:26:21,251 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2022-12-12 16:26:21,251 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 252 transitions, 3740 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 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 16:26:21,251 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:26:21,251 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2022-12-12 16:26:21,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:26:22,601 INFO L130 PetriNetUnfolder]: 6371/9862 cut-off events. [2022-12-12 16:26:22,601 INFO L131 PetriNetUnfolder]: For 204460/204490 co-relation queries the response was YES. [2022-12-12 16:26:22,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82947 conditions, 9862 events. 6371/9862 cut-off events. For 204460/204490 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 60471 event pairs, 1328 based on Foata normal form. 201/9309 useless extension candidates. Maximal degree in co-relation 82890. Up to 7388 conditions per place. [2022-12-12 16:26:22,677 INFO L137 encePairwiseOnDemand]: 24/28 looper letters, 268 selfloop transitions, 64 changer transitions 17/352 dead transitions. [2022-12-12 16:26:22,677 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 352 transitions, 5867 flow [2022-12-12 16:26:22,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 16:26:22,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 16:26:22,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 72 transitions. [2022-12-12 16:26:22,678 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2022-12-12 16:26:22,678 INFO L175 Difference]: Start difference. First operand has 168 places, 252 transitions, 3740 flow. Second operand 4 states and 72 transitions. [2022-12-12 16:26:22,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 352 transitions, 5867 flow [2022-12-12 16:26:23,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 352 transitions, 5550 flow, removed 79 selfloop flow, removed 14 redundant places. [2022-12-12 16:26:23,295 INFO L231 Difference]: Finished difference. Result has 157 places, 270 transitions, 4191 flow [2022-12-12 16:26:23,296 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=3486, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4191, PETRI_PLACES=157, PETRI_TRANSITIONS=270} [2022-12-12 16:26:23,296 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 125 predicate places. [2022-12-12 16:26:23,296 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 270 transitions, 4191 flow [2022-12-12 16:26:23,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 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 16:26:23,296 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:26:23,296 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] [2022-12-12 16:26:23,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-12 16:26:23,296 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 1 more)] === [2022-12-12 16:26:23,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:26:23,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1687116662, now seen corresponding path program 1 times [2022-12-12 16:26:23,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:26:23,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818176038] [2022-12-12 16:26:23,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:26:23,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:26:23,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:26:23,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:26:23,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:26:23,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818176038] [2022-12-12 16:26:23,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818176038] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:26:23,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529284200] [2022-12-12 16:26:23,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:26:23,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:26:23,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:26:23,672 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 16:26:23,705 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 16:26:23,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:26:23,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-12 16:26:23,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:26:24,040 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:26:24,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:26:24,205 INFO L321 Elim1Store]: treesize reduction 23, result has 77.2 percent of original size [2022-12-12 16:26:24,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 90 [2022-12-12 16:26:24,452 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:26:24,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529284200] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:26:24,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:26:24,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 28 [2022-12-12 16:26:24,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634869466] [2022-12-12 16:26:24,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:26:24,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-12 16:26:24,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:26:24,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-12 16:26:24,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-12-12 16:26:24,455 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 28 [2022-12-12 16:26:24,455 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 270 transitions, 4191 flow. Second operand has 29 states, 29 states have (on average 4.448275862068965) internal successors, (129), 29 states have internal predecessors, (129), 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 16:26:24,455 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:26:24,455 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 28 [2022-12-12 16:26:24,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:26:32,291 INFO L130 PetriNetUnfolder]: 25308/38906 cut-off events. [2022-12-12 16:26:32,291 INFO L131 PetriNetUnfolder]: For 863784/863856 co-relation queries the response was YES. [2022-12-12 16:26:32,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340971 conditions, 38906 events. 25308/38906 cut-off events. For 863784/863856 co-relation queries the response was YES. Maximal size of possible extension queue 1741. Compared 283533 event pairs, 1249 based on Foata normal form. 1904/37540 useless extension candidates. Maximal degree in co-relation 340918. Up to 9599 conditions per place. [2022-12-12 16:26:32,748 INFO L137 encePairwiseOnDemand]: 14/28 looper letters, 1027 selfloop transitions, 595 changer transitions 2/1626 dead transitions. [2022-12-12 16:26:32,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 1626 transitions, 30848 flow [2022-12-12 16:26:32,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-12 16:26:32,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-12-12 16:26:32,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 462 transitions. [2022-12-12 16:26:32,765 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4342105263157895 [2022-12-12 16:26:32,765 INFO L175 Difference]: Start difference. First operand has 157 places, 270 transitions, 4191 flow. Second operand 38 states and 462 transitions. [2022-12-12 16:26:32,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 1626 transitions, 30848 flow [2022-12-12 16:26:38,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 1626 transitions, 27240 flow, removed 1520 selfloop flow, removed 5 redundant places. [2022-12-12 16:26:38,822 INFO L231 Difference]: Finished difference. Result has 202 places, 847 transitions, 15166 flow [2022-12-12 16:26:38,822 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=3969, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=15166, PETRI_PLACES=202, PETRI_TRANSITIONS=847} [2022-12-12 16:26:38,823 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 170 predicate places. [2022-12-12 16:26:38,823 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 847 transitions, 15166 flow [2022-12-12 16:26:38,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.448275862068965) internal successors, (129), 29 states have internal predecessors, (129), 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 16:26:38,824 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:26:38,824 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] [2022-12-12 16:26:38,829 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 16:26:39,028 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,SelfDestructingSolverStorable15 [2022-12-12 16:26:39,029 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 1 more)] === [2022-12-12 16:26:39,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:26:39,029 INFO L85 PathProgramCache]: Analyzing trace with hash -387198284, now seen corresponding path program 2 times [2022-12-12 16:26:39,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:26:39,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038599257] [2022-12-12 16:26:39,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:26:39,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:26:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:26:39,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:26:39,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:26:39,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038599257] [2022-12-12 16:26:39,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038599257] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:26:39,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861776697] [2022-12-12 16:26:39,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 16:26:39,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:26:39,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:26:39,468 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 16:26:39,471 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 16:26:39,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 16:26:39,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:26:39,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-12 16:26:39,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:26:39,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 16:26:39,764 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 19 treesize of output 21 [2022-12-12 16:26:39,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:26:39,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:26:39,947 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:26:39,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 40 [2022-12-12 16:26:39,949 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 18 [2022-12-12 16:26:40,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:26:40,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861776697] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:26:40,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:26:40,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2022-12-12 16:26:40,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923701217] [2022-12-12 16:26:40,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:26:40,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-12 16:26:40,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:26:40,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-12 16:26:40,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-12-12 16:26:40,185 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2022-12-12 16:26:40,185 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 847 transitions, 15166 flow. Second operand has 26 states, 26 states have (on average 5.576923076923077) internal successors, (145), 26 states have internal predecessors, (145), 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 16:26:40,185 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:26:40,185 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2022-12-12 16:26:40,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:26:54,416 INFO L130 PetriNetUnfolder]: 36730/56125 cut-off events. [2022-12-12 16:26:54,416 INFO L131 PetriNetUnfolder]: For 1366815/1366885 co-relation queries the response was YES. [2022-12-12 16:26:54,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 540733 conditions, 56125 events. 36730/56125 cut-off events. For 1366815/1366885 co-relation queries the response was YES. Maximal size of possible extension queue 2178. Compared 422287 event pairs, 2968 based on Foata normal form. 1590/53052 useless extension candidates. Maximal degree in co-relation 540665. Up to 13243 conditions per place. [2022-12-12 16:26:55,255 INFO L137 encePairwiseOnDemand]: 18/28 looper letters, 1857 selfloop transitions, 402 changer transitions 2/2264 dead transitions. [2022-12-12 16:26:55,255 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 2264 transitions, 46842 flow [2022-12-12 16:26:55,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-12 16:26:55,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-12 16:26:55,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 248 transitions. [2022-12-12 16:26:55,257 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2022-12-12 16:26:55,257 INFO L175 Difference]: Start difference. First operand has 202 places, 847 transitions, 15166 flow. Second operand 21 states and 248 transitions. [2022-12-12 16:26:55,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 2264 transitions, 46842 flow [2022-12-12 16:27:22,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 2264 transitions, 44807 flow, removed 982 selfloop flow, removed 4 redundant places. [2022-12-12 16:27:22,118 INFO L231 Difference]: Finished difference. Result has 225 places, 1068 transitions, 20375 flow [2022-12-12 16:27:22,118 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=14046, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=843, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=20375, PETRI_PLACES=225, PETRI_TRANSITIONS=1068} [2022-12-12 16:27:22,124 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 193 predicate places. [2022-12-12 16:27:22,124 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 1068 transitions, 20375 flow [2022-12-12 16:27:22,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.576923076923077) internal successors, (145), 26 states have internal predecessors, (145), 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 16:27:22,124 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:27:22,124 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] [2022-12-12 16:27:22,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-12 16:27:22,331 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,SelfDestructingSolverStorable16 [2022-12-12 16:27:22,331 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 1 more)] === [2022-12-12 16:27:22,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:27:22,331 INFO L85 PathProgramCache]: Analyzing trace with hash -2039090512, now seen corresponding path program 1 times [2022-12-12 16:27:22,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:27:22,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427497851] [2022-12-12 16:27:22,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:27:22,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:27:22,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:27:23,594 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:27:23,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:27:23,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427497851] [2022-12-12 16:27:23,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427497851] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:27:23,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722228269] [2022-12-12 16:27:23,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:27:23,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:27:23,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:27:23,604 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 16:27:23,610 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 16:27:23,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:27:23,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-12 16:27:23,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:27:24,073 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-12-12 16:27:24,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 10 [2022-12-12 16:27:24,102 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 16:27:24,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:27:26,193 WARN L837 $PredicateComparison]: unable to prove that (forall ((~q2~0.base Int) (~q2~0.offset Int)) (let ((.cse0 (select |c_#memory_int| ~q2~0.base))) (or (= c_~N~0 (+ c_~t~0 (select .cse0 (+ ~q2~0.offset (* c_~q2_front~0 4))))) (not (= (select .cse0 (+ ~q2~0.offset (* c_~q2_back~0 4))) (select (select |c_#memory_int| c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))))))) is different from false [2022-12-12 16:27:28,297 INFO L321 Elim1Store]: treesize reduction 19, result has 81.2 percent of original size [2022-12-12 16:27:28,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 103 [2022-12-12 16:27:28,442 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 1 not checked. [2022-12-12 16:27:28,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722228269] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:27:28,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:27:28,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7, 7] total 28 [2022-12-12 16:27:28,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764347285] [2022-12-12 16:27:28,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:27:28,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-12 16:27:28,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:27:28,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-12 16:27:28,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=739, Unknown=1, NotChecked=54, Total=870 [2022-12-12 16:27:28,443 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 28 [2022-12-12 16:27:28,444 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 1068 transitions, 20375 flow. Second operand has 30 states, 30 states have (on average 3.5) internal successors, (105), 30 states have internal predecessors, (105), 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 16:27:28,444 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:27:28,444 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 28 [2022-12-12 16:27:28,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:27:50,594 INFO L130 PetriNetUnfolder]: 40088/61936 cut-off events. [2022-12-12 16:27:50,595 INFO L131 PetriNetUnfolder]: For 1529544/1529544 co-relation queries the response was YES. [2022-12-12 16:27:51,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 595992 conditions, 61936 events. 40088/61936 cut-off events. For 1529544/1529544 co-relation queries the response was YES. Maximal size of possible extension queue 2443. Compared 480242 event pairs, 8693 based on Foata normal form. 34/57141 useless extension candidates. Maximal degree in co-relation 595916. Up to 57194 conditions per place. [2022-12-12 16:27:51,616 INFO L137 encePairwiseOnDemand]: 13/28 looper letters, 1214 selfloop transitions, 141 changer transitions 46/1402 dead transitions. [2022-12-12 16:27:51,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 1402 transitions, 27745 flow [2022-12-12 16:27:51,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-12 16:27:51,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-12 16:27:51,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 224 transitions. [2022-12-12 16:27:51,617 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2962962962962963 [2022-12-12 16:27:51,617 INFO L175 Difference]: Start difference. First operand has 225 places, 1068 transitions, 20375 flow. Second operand 27 states and 224 transitions. [2022-12-12 16:27:51,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 1402 transitions, 27745 flow [2022-12-12 16:28:21,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 1402 transitions, 27518 flow, removed 82 selfloop flow, removed 8 redundant places. [2022-12-12 16:28:21,273 INFO L231 Difference]: Finished difference. Result has 256 places, 1165 transitions, 22130 flow [2022-12-12 16:28:21,274 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=20187, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1068, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=962, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=22130, PETRI_PLACES=256, PETRI_TRANSITIONS=1165} [2022-12-12 16:28:21,274 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 224 predicate places. [2022-12-12 16:28:21,274 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 1165 transitions, 22130 flow [2022-12-12 16:28:21,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.5) internal successors, (105), 30 states have internal predecessors, (105), 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 16:28:21,274 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:28:21,274 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 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] [2022-12-12 16:28:21,283 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 16:28:21,479 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,SelfDestructingSolverStorable17 [2022-12-12 16:28:21,479 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 1 more)] === [2022-12-12 16:28:21,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:28:21,480 INFO L85 PathProgramCache]: Analyzing trace with hash -447650250, now seen corresponding path program 3 times [2022-12-12 16:28:21,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:28:21,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679048160] [2022-12-12 16:28:21,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:28:21,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:28:21,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:28:23,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:28:23,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:28:23,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679048160] [2022-12-12 16:28:23,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679048160] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:28:23,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803214734] [2022-12-12 16:28:23,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 16:28:23,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:28:23,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:28:23,209 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 16:28:23,211 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 16:28:23,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 16:28:23,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:28:23,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-12 16:28:23,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:28:23,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 16:28:23,571 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 19 treesize of output 21 [2022-12-12 16:28:23,597 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-12 16:28:23,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 16:28:23,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803214734] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 16:28:23,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 16:28:23,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [15] total 20 [2022-12-12 16:28:23,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565659698] [2022-12-12 16:28:23,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:28:23,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 16:28:23,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:28:23,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 16:28:23,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2022-12-12 16:28:23,598 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2022-12-12 16:28:23,599 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 1165 transitions, 22130 flow. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 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 16:28:23,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:28:23,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2022-12-12 16:28:23,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:28:39,377 INFO L130 PetriNetUnfolder]: 35041/53875 cut-off events. [2022-12-12 16:28:39,378 INFO L131 PetriNetUnfolder]: For 1379631/1379723 co-relation queries the response was YES. [2022-12-12 16:28:40,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530015 conditions, 53875 events. 35041/53875 cut-off events. For 1379631/1379723 co-relation queries the response was YES. Maximal size of possible extension queue 2222. Compared 406852 event pairs, 3395 based on Foata normal form. 1093/50777 useless extension candidates. Maximal degree in co-relation 529929. Up to 27969 conditions per place. [2022-12-12 16:28:40,326 INFO L137 encePairwiseOnDemand]: 24/28 looper letters, 1261 selfloop transitions, 133 changer transitions 0/1398 dead transitions. [2022-12-12 16:28:40,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 1398 transitions, 29238 flow [2022-12-12 16:28:40,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 16:28:40,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 16:28:40,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 57 transitions. [2022-12-12 16:28:40,327 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2022-12-12 16:28:40,328 INFO L175 Difference]: Start difference. First operand has 256 places, 1165 transitions, 22130 flow. Second operand 4 states and 57 transitions. [2022-12-12 16:28:40,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 1398 transitions, 29238 flow [2022-12-12 16:29:07,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 1398 transitions, 28964 flow, removed 119 selfloop flow, removed 6 redundant places. [2022-12-12 16:29:07,574 INFO L231 Difference]: Finished difference. Result has 252 places, 1125 transitions, 21372 flow [2022-12-12 16:29:07,575 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=20966, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=992, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=21372, PETRI_PLACES=252, PETRI_TRANSITIONS=1125} [2022-12-12 16:29:07,575 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 220 predicate places. [2022-12-12 16:29:07,575 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 1125 transitions, 21372 flow [2022-12-12 16:29:07,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 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 16:29:07,575 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:29:07,576 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] [2022-12-12 16:29:07,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-12 16:29:07,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:29:07,781 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 1 more)] === [2022-12-12 16:29:07,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:29:07,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1472576082, now seen corresponding path program 2 times [2022-12-12 16:29:07,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:29:07,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220670171] [2022-12-12 16:29:07,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:29:07,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:29:07,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:29:09,253 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:29:09,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:29:09,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220670171] [2022-12-12 16:29:09,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220670171] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:29:09,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944494694] [2022-12-12 16:29:09,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 16:29:09,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:29:09,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:29:09,255 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 16:29:09,255 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 16:29:09,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 16:29:09,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:29:09,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 58 conjunts are in the unsatisfiable core [2022-12-12 16:29:09,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:29:09,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 16:29:09,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 16:29:09,828 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-12-12 16:29:09,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 14 [2022-12-12 16:29:09,865 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 16:29:09,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:29:12,193 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (* c_~q2_back~0 4)) (.cse4 (* c_~q2_front~0 4)) (.cse6 (+ (* c_~q1_front~0 4) c_~q1~0.offset))) (and (forall ((v_ArrVal_906 (Array Int Int))) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_906))) (let ((.cse0 (select (select .cse5 c_~q1~0.base) .cse6))) (or (= .cse0 0) (forall ((~q2~0.base Int) (~q2~0.offset Int)) (let ((.cse1 (select .cse5 ~q2~0.base))) (let ((.cse3 (select .cse1 (+ ~q2~0.offset .cse4)))) (or (not (= .cse0 (select .cse1 (+ ~q2~0.offset .cse2)))) (= .cse3 0) (<= c_~N~0 (+ c_~t~0 .cse3)))))))))) (forall ((v_ArrVal_906 (Array Int Int))) (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_906))) (let ((.cse7 (select (select .cse10 c_~q1~0.base) .cse6))) (or (= .cse7 0) (forall ((~q2~0.base Int) (~q2~0.offset Int)) (let ((.cse8 (select .cse10 ~q2~0.base))) (let ((.cse9 (select .cse8 (+ ~q2~0.offset .cse4)))) (or (not (= .cse7 (select .cse8 (+ ~q2~0.offset .cse2)))) (< (+ c_~t~0 .cse9) (+ c_~N~0 1)) (= .cse9 0))))))))))) is different from false [2022-12-12 16:29:12,415 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:29:12,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 406 treesize of output 534 [2022-12-12 16:29:12,455 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:29:12,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 281 treesize of output 284 [2022-12-12 16:29:12,490 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:29:12,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 239 treesize of output 242 [2022-12-12 16:30:32,035 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 16:30:32,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944494694] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:30:32,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:30:32,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 35 [2022-12-12 16:30:32,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269841338] [2022-12-12 16:30:32,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:30:32,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-12 16:30:32,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:30:32,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-12 16:30:32,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1165, Unknown=1, NotChecked=68, Total=1332 [2022-12-12 16:30:32,038 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 28 [2022-12-12 16:30:32,038 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 1125 transitions, 21372 flow. Second operand has 37 states, 37 states have (on average 3.189189189189189) internal successors, (118), 37 states have internal predecessors, (118), 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 16:30:32,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:30:32,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 28 [2022-12-12 16:30:32,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:30:35,617 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 [0] [2022-12-12 16:30:40,388 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 [0] [2022-12-12 16:30:58,284 INFO L130 PetriNetUnfolder]: 38360/59830 cut-off events. [2022-12-12 16:30:58,284 INFO L131 PetriNetUnfolder]: For 1530963/1530963 co-relation queries the response was YES. [2022-12-12 16:30:58,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584511 conditions, 59830 events. 38360/59830 cut-off events. For 1530963/1530963 co-relation queries the response was YES. Maximal size of possible extension queue 2307. Compared 466386 event pairs, 6478 based on Foata normal form. 20/55371 useless extension candidates. Maximal degree in co-relation 584425. Up to 45810 conditions per place. [2022-12-12 16:30:59,248 INFO L137 encePairwiseOnDemand]: 12/28 looper letters, 1182 selfloop transitions, 337 changer transitions 64/1584 dead transitions. [2022-12-12 16:30:59,248 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 1584 transitions, 31303 flow [2022-12-12 16:30:59,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-12 16:30:59,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-12 16:30:59,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 283 transitions. [2022-12-12 16:30:59,249 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.28877551020408165 [2022-12-12 16:30:59,249 INFO L175 Difference]: Start difference. First operand has 252 places, 1125 transitions, 21372 flow. Second operand 35 states and 283 transitions. [2022-12-12 16:30:59,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 1584 transitions, 31303 flow [2022-12-12 16:31:28,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 1584 transitions, 30915 flow, removed 10 selfloop flow, removed 4 redundant places. [2022-12-12 16:31:28,838 INFO L231 Difference]: Finished difference. Result has 292 places, 1253 transitions, 24337 flow [2022-12-12 16:31:28,839 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=21095, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=866, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=24337, PETRI_PLACES=292, PETRI_TRANSITIONS=1253} [2022-12-12 16:31:28,840 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 260 predicate places. [2022-12-12 16:31:28,840 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 1253 transitions, 24337 flow [2022-12-12 16:31:28,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.189189189189189) internal successors, (118), 37 states have internal predecessors, (118), 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 16:31:28,840 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:31:28,841 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] [2022-12-12 16:31:28,846 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 16:31:29,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:31:29,046 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 1 more)] === [2022-12-12 16:31:29,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:31:29,046 INFO L85 PathProgramCache]: Analyzing trace with hash 587505092, now seen corresponding path program 3 times [2022-12-12 16:31:29,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:31:29,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611494891] [2022-12-12 16:31:29,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:31:29,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:31:29,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:31:30,379 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:31:30,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:31:30,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611494891] [2022-12-12 16:31:30,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611494891] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:31:30,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509854515] [2022-12-12 16:31:30,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 16:31:30,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:31:30,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:31:30,381 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 16:31:30,382 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 16:31:30,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 16:31:30,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:31:30,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 57 conjunts are in the unsatisfiable core [2022-12-12 16:31:30,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:31:30,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 16:31:30,897 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-12-12 16:31:30,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 44 [2022-12-12 16:31:30,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-12-12 16:31:30,981 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 25 treesize of output 7 [2022-12-12 16:31:31,009 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 16:31:31,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:31:31,082 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~q2~0.offset (* c_~q2_front~0 4)))) (and (forall ((v_ArrVal_967 (Array Int Int))) (<= c_~N~0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_967) c_~q2~0.base) .cse0) c_~t~0))) (forall ((v_ArrVal_967 (Array Int Int))) (< (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_967) c_~q2~0.base) .cse0) c_~t~0) (+ c_~N~0 1))))) is different from false [2022-12-12 16:31:31,386 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:31:31,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 126 treesize of output 306 [2022-12-12 16:31:31,424 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 65 treesize of output 59 [2022-12-12 16:31:31,432 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 59 treesize of output 53 [2022-12-12 16:31:35,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 1 not checked. [2022-12-12 16:31:35,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509854515] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:31:35,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:31:35,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 38 [2022-12-12 16:31:35,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668521749] [2022-12-12 16:31:35,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:31:35,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-12 16:31:35,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:31:35,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-12 16:31:35,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1375, Unknown=1, NotChecked=74, Total=1560 [2022-12-12 16:31:35,991 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 28 [2022-12-12 16:31:35,991 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 1253 transitions, 24337 flow. Second operand has 40 states, 40 states have (on average 3.075) internal successors, (123), 40 states have internal predecessors, (123), 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 16:31:35,991 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:31:35,992 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 28 [2022-12-12 16:31:35,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:31:56,614 INFO L130 PetriNetUnfolder]: 39289/61407 cut-off events. [2022-12-12 16:31:56,614 INFO L131 PetriNetUnfolder]: For 1627394/1627394 co-relation queries the response was YES. [2022-12-12 16:31:57,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 611460 conditions, 61407 events. 39289/61407 cut-off events. For 1627394/1627394 co-relation queries the response was YES. Maximal size of possible extension queue 2347. Compared 483598 event pairs, 8641 based on Foata normal form. 28/57010 useless extension candidates. Maximal degree in co-relation 611365. Up to 55542 conditions per place. [2022-12-12 16:31:57,706 INFO L137 encePairwiseOnDemand]: 9/28 looper letters, 1305 selfloop transitions, 200 changer transitions 37/1543 dead transitions. [2022-12-12 16:31:57,706 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 1543 transitions, 31600 flow [2022-12-12 16:31:57,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-12 16:31:57,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-12 16:31:57,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 239 transitions. [2022-12-12 16:31:57,708 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2845238095238095 [2022-12-12 16:31:57,708 INFO L175 Difference]: Start difference. First operand has 292 places, 1253 transitions, 24337 flow. Second operand 30 states and 239 transitions. [2022-12-12 16:31:57,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 1543 transitions, 31600 flow [2022-12-12 16:32:32,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 1543 transitions, 31165 flow, removed 175 selfloop flow, removed 16 redundant places. [2022-12-12 16:32:32,536 INFO L231 Difference]: Finished difference. Result has 311 places, 1316 transitions, 25599 flow [2022-12-12 16:32:32,537 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=23940, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1077, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=25599, PETRI_PLACES=311, PETRI_TRANSITIONS=1316} [2022-12-12 16:32:32,537 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 279 predicate places. [2022-12-12 16:32:32,537 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 1316 transitions, 25599 flow [2022-12-12 16:32:32,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.075) internal successors, (123), 40 states have internal predecessors, (123), 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 16:32:32,538 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:32:32,538 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] [2022-12-12 16:32:32,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-12 16:32:32,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-12 16:32:32,743 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 16:32:32,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:32:32,744 INFO L85 PathProgramCache]: Analyzing trace with hash 868644958, now seen corresponding path program 4 times [2022-12-12 16:32:32,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:32:32,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919731086] [2022-12-12 16:32:32,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:32:32,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:32:32,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:32:33,923 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:32:33,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:32:33,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919731086] [2022-12-12 16:32:33,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919731086] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:32:33,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217333759] [2022-12-12 16:32:33,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 16:32:33,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:32:33,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:32:33,925 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 16:32:33,926 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 16:32:34,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 16:32:34,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:32:34,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-12 16:32:34,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:32:34,447 INFO L321 Elim1Store]: treesize reduction 52, result has 5.5 percent of original size [2022-12-12 16:32:34,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 13 [2022-12-12 16:32:34,473 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 16:32:34,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:32:34,761 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:32:34,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 95 treesize of output 279 [2022-12-12 16:32:46,280 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 16:32:46,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217333759] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:32:46,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:32:46,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 7] total 29 [2022-12-12 16:32:46,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349140986] [2022-12-12 16:32:46,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:32:46,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-12 16:32:46,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:32:46,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-12 16:32:46,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2022-12-12 16:32:46,281 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 28 [2022-12-12 16:32:46,282 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 1316 transitions, 25599 flow. Second operand has 31 states, 31 states have (on average 3.5806451612903225) internal successors, (111), 31 states have internal predecessors, (111), 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 16:32:46,282 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:32:46,282 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 28 [2022-12-12 16:32:46,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand