/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/unroll-cond-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 16:39:31,719 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 16:39:31,721 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 16:39:31,759 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 16:39:31,761 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 16:39:31,765 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 16:39:31,768 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 16:39:31,772 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 16:39:31,776 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 16:39:31,780 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 16:39:31,780 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 16:39:31,781 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 16:39:31,781 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 16:39:31,782 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 16:39:31,783 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 16:39:31,784 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 16:39:31,784 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 16:39:31,785 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 16:39:31,786 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 16:39:31,787 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 16:39:31,788 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 16:39:31,792 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 16:39:31,794 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 16:39:31,795 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 16:39:31,806 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 16:39:31,806 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 16:39:31,806 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 16:39:31,808 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 16:39:31,808 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 16:39:31,808 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 16:39:31,809 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 16:39:31,814 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 16:39:31,814 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 16:39:31,815 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 16:39:31,816 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 16:39:31,816 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 16:39:31,816 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 16:39:31,817 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 16:39:31,817 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 16:39:31,817 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 16:39:31,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 16:39:31,820 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 16:39:31,852 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 16:39:31,852 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 16:39:31,854 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 16:39:31,854 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 16:39:31,855 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 16:39:31,855 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 16:39:31,855 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 16:39:31,856 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 16:39:31,856 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 16:39:31,856 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 16:39:31,857 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 16:39:31,857 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 16:39:31,857 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 16:39:31,857 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 16:39:31,882 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 16:39:31,882 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 16:39:31,882 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 16:39:31,882 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 16:39:31,882 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 16:39:31,882 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 16:39:31,883 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 16:39:31,883 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 16:39:31,883 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 16:39:31,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 16:39:31,883 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 16:39:31,883 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 16:39:31,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 16:39:31,884 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 16:39:31,884 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 16:39:31,884 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 16:39:31,884 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-12 16:39:32,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 16:39:32,192 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 16:39:32,195 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 16:39:32,195 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 16:39:32,196 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 16:39:32,197 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-cond-2.wvr.c [2022-12-12 16:39:33,209 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 16:39:33,414 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 16:39:33,415 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-2.wvr.c [2022-12-12 16:39:33,426 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bde7bcf3/196586d574344c8d92ccd3c4da38b3c4/FLAGa3adadee3 [2022-12-12 16:39:33,445 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bde7bcf3/196586d574344c8d92ccd3c4da38b3c4 [2022-12-12 16:39:33,447 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 16:39:33,449 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 16:39:33,451 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 16:39:33,451 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 16:39:33,454 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 16:39:33,454 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 04:39:33" (1/1) ... [2022-12-12 16:39:33,455 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56e36bd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:39:33, skipping insertion in model container [2022-12-12 16:39:33,455 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 04:39:33" (1/1) ... [2022-12-12 16:39:33,461 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 16:39:33,485 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 16:39:33,668 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/unroll-cond-2.wvr.c[2474,2487] [2022-12-12 16:39:33,682 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 16:39:33,690 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 16:39:33,723 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/unroll-cond-2.wvr.c[2474,2487] [2022-12-12 16:39:33,726 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 16:39:33,739 INFO L208 MainTranslator]: Completed translation [2022-12-12 16:39:33,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:39:33 WrapperNode [2022-12-12 16:39:33,741 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 16:39:33,742 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 16:39:33,742 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 16:39:33,742 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 16:39:33,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:39:33" (1/1) ... [2022-12-12 16:39:33,762 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:39:33" (1/1) ... [2022-12-12 16:39:33,791 INFO L138 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 141 [2022-12-12 16:39:33,792 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 16:39:33,794 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 16:39:33,794 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 16:39:33,794 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 16:39:33,801 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:39:33" (1/1) ... [2022-12-12 16:39:33,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:39:33" (1/1) ... [2022-12-12 16:39:33,815 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:39:33" (1/1) ... [2022-12-12 16:39:33,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:39:33" (1/1) ... [2022-12-12 16:39:33,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:39:33" (1/1) ... [2022-12-12 16:39:33,823 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:39:33" (1/1) ... [2022-12-12 16:39:33,824 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:39:33" (1/1) ... [2022-12-12 16:39:33,825 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:39:33" (1/1) ... [2022-12-12 16:39:33,833 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 16:39:33,834 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 16:39:33,834 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 16:39:33,834 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 16:39:33,835 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:39:33" (1/1) ... [2022-12-12 16:39:33,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 16:39:33,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:39:33,873 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 16:39:33,896 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 16:39:33,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 16:39:33,909 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-12 16:39:33,909 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-12 16:39:33,909 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-12 16:39:33,909 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-12 16:39:33,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 16:39:33,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 16:39:33,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 16:39:33,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-12 16:39:33,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 16:39:33,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 16:39:33,910 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-12 16:39:33,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 16:39:33,911 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 16:39:33,989 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 16:39:33,991 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 16:39:34,297 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 16:39:34,304 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 16:39:34,305 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-12 16:39:34,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 04:39:34 BoogieIcfgContainer [2022-12-12 16:39:34,306 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 16:39:34,308 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 16:39:34,309 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 16:39:34,311 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 16:39:34,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 04:39:33" (1/3) ... [2022-12-12 16:39:34,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3244bfa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 04:39:34, skipping insertion in model container [2022-12-12 16:39:34,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:39:33" (2/3) ... [2022-12-12 16:39:34,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3244bfa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 04:39:34, skipping insertion in model container [2022-12-12 16:39:34,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 04:39:34" (3/3) ... [2022-12-12 16:39:34,313 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.c [2022-12-12 16:39:34,329 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 16:39:34,330 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 16:39:34,330 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 16:39:34,413 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-12 16:39:34,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 163 transitions, 342 flow [2022-12-12 16:39:34,542 INFO L130 PetriNetUnfolder]: 15/161 cut-off events. [2022-12-12 16:39:34,543 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 16:39:34,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 161 events. 15/161 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 207 event pairs, 0 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 91. Up to 2 conditions per place. [2022-12-12 16:39:34,548 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 163 transitions, 342 flow [2022-12-12 16:39:34,557 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 145 places, 153 transitions, 318 flow [2022-12-12 16:39:34,559 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-12 16:39:34,583 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 145 places, 153 transitions, 318 flow [2022-12-12 16:39:34,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 153 transitions, 318 flow [2022-12-12 16:39:34,671 INFO L130 PetriNetUnfolder]: 15/153 cut-off events. [2022-12-12 16:39:34,671 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 16:39:34,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 153 events. 15/153 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 203 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 91. Up to 2 conditions per place. [2022-12-12 16:39:34,677 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 145 places, 153 transitions, 318 flow [2022-12-12 16:39:34,677 INFO L226 LiptonReduction]: Number of co-enabled transitions 2692 [2022-12-12 16:39:39,523 INFO L241 LiptonReduction]: Total number of compositions: 135 [2022-12-12 16:39:39,549 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 16:39:39,554 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;@361fbefa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 16:39:39,554 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-12 16:39:39,558 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2022-12-12 16:39:39,558 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 16:39:39,559 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:39:39,559 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:39:39,559 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:39:39,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:39:39,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1841114468, now seen corresponding path program 1 times [2022-12-12 16:39:39,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:39:39,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063797449] [2022-12-12 16:39:39,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:39:39,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:39:39,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:39:39,921 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 16:39:39,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:39:39,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063797449] [2022-12-12 16:39:39,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063797449] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 16:39:39,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 16:39:39,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-12 16:39:39,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138816140] [2022-12-12 16:39:39,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:39:39,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 16:39:39,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:39:39,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 16:39:39,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 16:39:39,959 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2022-12-12 16:39:39,961 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 16:39:39,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:39:39,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2022-12-12 16:39:39,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:39:40,013 INFO L130 PetriNetUnfolder]: 49/84 cut-off events. [2022-12-12 16:39:40,013 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-12 16:39:40,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 84 events. 49/84 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 198 event pairs, 19 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 129. Up to 81 conditions per place. [2022-12-12 16:39:40,015 INFO L137 encePairwiseOnDemand]: 14/17 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2022-12-12 16:39:40,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2022-12-12 16:39:40,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 16:39:40,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 16:39:40,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 23 transitions. [2022-12-12 16:39:40,025 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.45098039215686275 [2022-12-12 16:39:40,026 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 23 transitions. [2022-12-12 16:39:40,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2022-12-12 16:39:40,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-12 16:39:40,030 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2022-12-12 16:39:40,032 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2022-12-12 16:39:40,034 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2022-12-12 16:39:40,034 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2022-12-12 16:39:40,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 16:39:40,035 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:39:40,035 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:39:40,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 16:39:40,035 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:39:40,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:39:40,036 INFO L85 PathProgramCache]: Analyzing trace with hash 981370036, now seen corresponding path program 1 times [2022-12-12 16:39:40,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:39:40,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123006809] [2022-12-12 16:39:40,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:39:40,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:39:40,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:39:40,309 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 16:39:40,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:39:40,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123006809] [2022-12-12 16:39:40,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123006809] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 16:39:40,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 16:39:40,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-12 16:39:40,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200399474] [2022-12-12 16:39:40,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:39:40,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 16:39:40,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:39:40,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 16:39:40,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 16:39:40,313 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:39:40,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 16:39:40,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:39:40,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:39:40,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:39:40,431 INFO L130 PetriNetUnfolder]: 72/135 cut-off events. [2022-12-12 16:39:40,431 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 16:39:40,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 135 events. 72/135 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 366 event pairs, 24 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 274. Up to 77 conditions per place. [2022-12-12 16:39:40,433 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 35 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2022-12-12 16:39:40,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 40 transitions, 179 flow [2022-12-12 16:39:40,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 16:39:40,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 16:39:40,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 40 transitions. [2022-12-12 16:39:40,435 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2022-12-12 16:39:40,436 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 5 states and 40 transitions. [2022-12-12 16:39:40,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 40 transitions, 179 flow [2022-12-12 16:39:40,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 175 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-12 16:39:40,437 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 82 flow [2022-12-12 16:39:40,437 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2022-12-12 16:39:40,438 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2022-12-12 16:39:40,438 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 82 flow [2022-12-12 16:39:40,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 16:39:40,438 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:39:40,438 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:39:40,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-12 16:39:40,439 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:39:40,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:39:40,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1082835932, now seen corresponding path program 2 times [2022-12-12 16:39:40,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:39:40,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773215487] [2022-12-12 16:39:40,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:39:40,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:39:40,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:39:40,565 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 16:39:40,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:39:40,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773215487] [2022-12-12 16:39:40,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773215487] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 16:39:40,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 16:39:40,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-12 16:39:40,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057928129] [2022-12-12 16:39:40,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:39:40,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 16:39:40,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:39:40,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 16:39:40,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 16:39:40,567 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:39:40,567 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 16:39:40,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:39:40,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:39:40,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:39:40,698 INFO L130 PetriNetUnfolder]: 109/198 cut-off events. [2022-12-12 16:39:40,698 INFO L131 PetriNetUnfolder]: For 115/115 co-relation queries the response was YES. [2022-12-12 16:39:40,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 198 events. 109/198 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 602 event pairs, 24 based on Foata normal form. 2/161 useless extension candidates. Maximal degree in co-relation 560. Up to 87 conditions per place. [2022-12-12 16:39:40,703 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 40 selfloop transitions, 12 changer transitions 0/52 dead transitions. [2022-12-12 16:39:40,704 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 52 transitions, 292 flow [2022-12-12 16:39:40,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 16:39:40,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 16:39:40,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 48 transitions. [2022-12-12 16:39:40,706 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2022-12-12 16:39:40,706 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 82 flow. Second operand 6 states and 48 transitions. [2022-12-12 16:39:40,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 52 transitions, 292 flow [2022-12-12 16:39:40,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 52 transitions, 275 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-12-12 16:39:40,711 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 163 flow [2022-12-12 16:39:40,711 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2022-12-12 16:39:40,712 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2022-12-12 16:39:40,712 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 163 flow [2022-12-12 16:39:40,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 16:39:40,713 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:39:40,713 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:39:40,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-12 16:39:40,713 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:39:40,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:39:40,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1178467390, now seen corresponding path program 3 times [2022-12-12 16:39:40,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:39:40,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49293959] [2022-12-12 16:39:40,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:39:40,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:39:40,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:39:40,878 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 16:39:40,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:39:40,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49293959] [2022-12-12 16:39:40,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49293959] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 16:39:40,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 16:39:40,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-12 16:39:40,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651113636] [2022-12-12 16:39:40,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:39:40,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 16:39:40,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:39:40,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 16:39:40,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 16:39:40,880 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:39:40,881 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 163 flow. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 16:39:40,881 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:39:40,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:39:40,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:39:41,033 INFO L130 PetriNetUnfolder]: 119/214 cut-off events. [2022-12-12 16:39:41,034 INFO L131 PetriNetUnfolder]: For 334/334 co-relation queries the response was YES. [2022-12-12 16:39:41,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800 conditions, 214 events. 119/214 cut-off events. For 334/334 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 689 event pairs, 28 based on Foata normal form. 4/187 useless extension candidates. Maximal degree in co-relation 778. Up to 111 conditions per place. [2022-12-12 16:39:41,036 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 40 selfloop transitions, 14 changer transitions 0/54 dead transitions. [2022-12-12 16:39:41,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 54 transitions, 376 flow [2022-12-12 16:39:41,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 16:39:41,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 16:39:41,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 41 transitions. [2022-12-12 16:39:41,037 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4823529411764706 [2022-12-12 16:39:41,037 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 163 flow. Second operand 5 states and 41 transitions. [2022-12-12 16:39:41,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 54 transitions, 376 flow [2022-12-12 16:39:41,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 54 transitions, 362 flow, removed 7 selfloop flow, removed 0 redundant places. [2022-12-12 16:39:41,040 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 255 flow [2022-12-12 16:39:41,040 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=255, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2022-12-12 16:39:41,041 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2022-12-12 16:39:41,041 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 255 flow [2022-12-12 16:39:41,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 16:39:41,041 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:39:41,042 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:39:41,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-12 16:39:41,042 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:39:41,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:39:41,042 INFO L85 PathProgramCache]: Analyzing trace with hash 114570906, now seen corresponding path program 4 times [2022-12-12 16:39:41,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:39:41,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483574460] [2022-12-12 16:39:41,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:39:41,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:39:41,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:39:41,151 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 16:39:41,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:39:41,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483574460] [2022-12-12 16:39:41,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483574460] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 16:39:41,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 16:39:41,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-12 16:39:41,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679958694] [2022-12-12 16:39:41,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:39:41,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 16:39:41,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:39:41,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 16:39:41,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-12 16:39:41,153 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:39:41,153 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 255 flow. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 16:39:41,153 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:39:41,153 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:39:41,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:39:41,257 INFO L130 PetriNetUnfolder]: 115/210 cut-off events. [2022-12-12 16:39:41,258 INFO L131 PetriNetUnfolder]: For 605/605 co-relation queries the response was YES. [2022-12-12 16:39:41,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 874 conditions, 210 events. 115/210 cut-off events. For 605/605 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 675 event pairs, 36 based on Foata normal form. 4/189 useless extension candidates. Maximal degree in co-relation 848. Up to 167 conditions per place. [2022-12-12 16:39:41,259 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 33 selfloop transitions, 18 changer transitions 0/51 dead transitions. [2022-12-12 16:39:41,260 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 51 transitions, 430 flow [2022-12-12 16:39:41,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 16:39:41,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 16:39:41,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 35 transitions. [2022-12-12 16:39:41,262 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2022-12-12 16:39:41,262 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 255 flow. Second operand 5 states and 35 transitions. [2022-12-12 16:39:41,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 51 transitions, 430 flow [2022-12-12 16:39:41,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 414 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-12-12 16:39:41,267 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 347 flow [2022-12-12 16:39:41,267 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=347, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2022-12-12 16:39:41,269 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2022-12-12 16:39:41,270 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 347 flow [2022-12-12 16:39:41,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 16:39:41,270 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:39:41,270 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:39:41,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-12 16:39:41,270 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:39:41,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:39:41,271 INFO L85 PathProgramCache]: Analyzing trace with hash -879413800, now seen corresponding path program 5 times [2022-12-12 16:39:41,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:39:41,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140519900] [2022-12-12 16:39:41,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:39:41,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:39:41,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:39:41,375 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 16:39:41,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:39:41,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140519900] [2022-12-12 16:39:41,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140519900] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 16:39:41,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 16:39:41,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-12 16:39:41,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135077511] [2022-12-12 16:39:41,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:39:41,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 16:39:41,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:39:41,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 16:39:41,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-12 16:39:41,378 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:39:41,379 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 347 flow. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 16:39:41,379 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:39:41,379 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:39:41,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:39:41,465 INFO L130 PetriNetUnfolder]: 116/213 cut-off events. [2022-12-12 16:39:41,466 INFO L131 PetriNetUnfolder]: For 616/616 co-relation queries the response was YES. [2022-12-12 16:39:41,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 948 conditions, 213 events. 116/213 cut-off events. For 616/616 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 695 event pairs, 24 based on Foata normal form. 2/190 useless extension candidates. Maximal degree in co-relation 920. Up to 113 conditions per place. [2022-12-12 16:39:41,468 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 41 selfloop transitions, 15 changer transitions 0/56 dead transitions. [2022-12-12 16:39:41,468 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 56 transitions, 503 flow [2022-12-12 16:39:41,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 16:39:41,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 16:39:41,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 39 transitions. [2022-12-12 16:39:41,469 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4588235294117647 [2022-12-12 16:39:41,469 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 347 flow. Second operand 5 states and 39 transitions. [2022-12-12 16:39:41,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 56 transitions, 503 flow [2022-12-12 16:39:41,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 56 transitions, 460 flow, removed 14 selfloop flow, removed 1 redundant places. [2022-12-12 16:39:41,475 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 344 flow [2022-12-12 16:39:41,475 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=344, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2022-12-12 16:39:41,478 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 29 predicate places. [2022-12-12 16:39:41,478 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 344 flow [2022-12-12 16:39:41,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 16:39:41,479 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:39:41,479 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:39:41,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-12 16:39:41,479 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:39:41,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:39:41,480 INFO L85 PathProgramCache]: Analyzing trace with hash 253099056, now seen corresponding path program 6 times [2022-12-12 16:39:41,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:39:41,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877826204] [2022-12-12 16:39:41,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:39:41,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:39:41,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:39:41,625 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 16:39:41,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:39:41,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877826204] [2022-12-12 16:39:41,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877826204] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 16:39:41,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 16:39:41,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-12 16:39:41,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136505961] [2022-12-12 16:39:41,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:39:41,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 16:39:41,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:39:41,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 16:39:41,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 16:39:41,627 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:39:41,628 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 344 flow. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 16:39:41,628 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:39:41,628 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:39:41,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:39:41,722 INFO L130 PetriNetUnfolder]: 115/206 cut-off events. [2022-12-12 16:39:41,722 INFO L131 PetriNetUnfolder]: For 736/736 co-relation queries the response was YES. [2022-12-12 16:39:41,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 913 conditions, 206 events. 115/206 cut-off events. For 736/736 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 633 event pairs, 35 based on Foata normal form. 2/183 useless extension candidates. Maximal degree in co-relation 884. Up to 160 conditions per place. [2022-12-12 16:39:41,724 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 34 selfloop transitions, 18 changer transitions 0/52 dead transitions. [2022-12-12 16:39:41,724 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 52 transitions, 472 flow [2022-12-12 16:39:41,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 16:39:41,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 16:39:41,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 35 transitions. [2022-12-12 16:39:41,726 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2022-12-12 16:39:41,726 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 344 flow. Second operand 5 states and 35 transitions. [2022-12-12 16:39:41,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 52 transitions, 472 flow [2022-12-12 16:39:41,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 52 transitions, 438 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-12-12 16:39:41,730 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 350 flow [2022-12-12 16:39:41,730 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=350, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2022-12-12 16:39:41,731 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 31 predicate places. [2022-12-12 16:39:41,731 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 350 flow [2022-12-12 16:39:41,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 16:39:41,731 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:39:41,731 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:39:41,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-12 16:39:41,732 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:39:41,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:39:41,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1111675073, now seen corresponding path program 1 times [2022-12-12 16:39:41,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:39:41,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948769463] [2022-12-12 16:39:41,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:39:41,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:39:41,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:39:42,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:39:42,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:39:42,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948769463] [2022-12-12 16:39:42,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948769463] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:39:42,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591386251] [2022-12-12 16:39:42,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:39:42,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:39:42,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:39:42,031 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 16:39:42,076 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 16:39:42,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:39:42,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-12 16:39:42,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:39:42,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-12 16:39:42,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 16:39:42,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 16:39:42,825 INFO L321 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2022-12-12 16:39:42,826 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 179 treesize of output 121 [2022-12-12 16:39:42,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:39:42,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:39:43,433 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:39:43,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 78 [2022-12-12 16:39:43,453 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:39:43,453 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 488 treesize of output 444 [2022-12-12 16:39:43,475 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:39:43,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 424 treesize of output 396 [2022-12-12 16:39:43,498 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:39:43,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 376 treesize of output 300 [2022-12-12 16:39:44,040 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2022-12-12 16:39:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:39:44,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591386251] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:39:44,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:39:44,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 24 [2022-12-12 16:39:44,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388803930] [2022-12-12 16:39:44,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:39:44,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-12 16:39:44,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:39:44,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-12 16:39:44,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=423, Unknown=3, NotChecked=0, Total=552 [2022-12-12 16:39:44,347 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:39:44,348 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 350 flow. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 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 16:39:44,348 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:39:44,348 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:39:44,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:39:53,350 WARN L233 SmtUtils]: Spent 6.09s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 16:39:55,361 INFO L130 PetriNetUnfolder]: 444/772 cut-off events. [2022-12-12 16:39:55,361 INFO L131 PetriNetUnfolder]: For 2232/2232 co-relation queries the response was YES. [2022-12-12 16:39:55,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3261 conditions, 772 events. 444/772 cut-off events. For 2232/2232 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3496 event pairs, 2 based on Foata normal form. 7/646 useless extension candidates. Maximal degree in co-relation 2408. Up to 259 conditions per place. [2022-12-12 16:39:55,367 INFO L137 encePairwiseOnDemand]: 6/17 looper letters, 102 selfloop transitions, 89 changer transitions 78/269 dead transitions. [2022-12-12 16:39:55,367 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 269 transitions, 2140 flow [2022-12-12 16:39:55,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-12 16:39:55,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-12-12 16:39:55,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 241 transitions. [2022-12-12 16:39:55,370 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.34576757532281205 [2022-12-12 16:39:55,370 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 350 flow. Second operand 41 states and 241 transitions. [2022-12-12 16:39:55,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 269 transitions, 2140 flow [2022-12-12 16:39:55,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 269 transitions, 2053 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-12-12 16:39:55,384 INFO L231 Difference]: Finished difference. Result has 108 places, 111 transitions, 1121 flow [2022-12-12 16:39:55,384 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=1121, PETRI_PLACES=108, PETRI_TRANSITIONS=111} [2022-12-12 16:39:55,384 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 87 predicate places. [2022-12-12 16:39:55,385 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 111 transitions, 1121 flow [2022-12-12 16:39:55,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 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 16:39:55,385 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:39:55,385 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:39:55,392 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 16:39:55,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:39:55,591 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:39:55,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:39:55,592 INFO L85 PathProgramCache]: Analyzing trace with hash 213359780, now seen corresponding path program 1 times [2022-12-12 16:39:55,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:39:55,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057237913] [2022-12-12 16:39:55,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:39:55,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:39:55,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:39:55,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:39:55,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:39:55,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057237913] [2022-12-12 16:39:55,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057237913] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:39:55,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609465389] [2022-12-12 16:39:55,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:39:55,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:39:55,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:39:55,918 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 16:39:55,920 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 16:39:56,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:39:56,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-12 16:39:56,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:39:56,186 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 73 treesize of output 65 [2022-12-12 16:39:56,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:39:56,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:39:56,415 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-12-12 16:39:56,415 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 48 treesize of output 32 [2022-12-12 16:39:56,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:39:56,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609465389] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:39:56,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:39:56,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 10 [2022-12-12 16:39:56,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591323806] [2022-12-12 16:39:56,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:39:56,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-12 16:39:56,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:39:56,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-12 16:39:56,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-12-12 16:39:56,484 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:39:56,485 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 111 transitions, 1121 flow. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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 16:39:56,485 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:39:56,485 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:39:56,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:39:56,883 INFO L130 PetriNetUnfolder]: 376/653 cut-off events. [2022-12-12 16:39:56,883 INFO L131 PetriNetUnfolder]: For 3505/3505 co-relation queries the response was YES. [2022-12-12 16:39:56,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3322 conditions, 653 events. 376/653 cut-off events. For 3505/3505 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2786 event pairs, 18 based on Foata normal form. 1/604 useless extension candidates. Maximal degree in co-relation 3249. Up to 441 conditions per place. [2022-12-12 16:39:56,890 INFO L137 encePairwiseOnDemand]: 8/17 looper letters, 100 selfloop transitions, 56 changer transitions 4/160 dead transitions. [2022-12-12 16:39:56,890 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 160 transitions, 1735 flow [2022-12-12 16:39:56,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-12 16:39:56,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-12 16:39:56,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 72 transitions. [2022-12-12 16:39:56,892 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2022-12-12 16:39:56,892 INFO L175 Difference]: Start difference. First operand has 108 places, 111 transitions, 1121 flow. Second operand 9 states and 72 transitions. [2022-12-12 16:39:56,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 160 transitions, 1735 flow [2022-12-12 16:39:56,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 160 transitions, 1373 flow, removed 88 selfloop flow, removed 15 redundant places. [2022-12-12 16:39:56,909 INFO L231 Difference]: Finished difference. Result has 92 places, 127 transitions, 1106 flow [2022-12-12 16:39:56,909 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1106, PETRI_PLACES=92, PETRI_TRANSITIONS=127} [2022-12-12 16:39:56,910 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 71 predicate places. [2022-12-12 16:39:56,910 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 127 transitions, 1106 flow [2022-12-12 16:39:56,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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 16:39:56,910 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:39:56,911 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:39:56,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-12 16:39:57,118 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 16:39:57,118 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:39:57,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:39:57,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1256766850, now seen corresponding path program 2 times [2022-12-12 16:39:57,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:39:57,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594438082] [2022-12-12 16:39:57,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:39:57,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:39:57,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:39:57,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:39:57,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:39:57,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594438082] [2022-12-12 16:39:57,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594438082] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:39:57,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121432350] [2022-12-12 16:39:57,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 16:39:57,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:39:57,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:39:57,450 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 16:39:57,453 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 16:39:57,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 16:39:57,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:39:57,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-12 16:39:57,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:39:57,680 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 73 treesize of output 65 [2022-12-12 16:39:57,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:39:57,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:39:57,835 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:39:57,835 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 52 treesize of output 41 [2022-12-12 16:39:57,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:39:57,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121432350] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:39:57,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:39:57,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 10 [2022-12-12 16:39:57,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003784342] [2022-12-12 16:39:57,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:39:57,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-12 16:39:57,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:39:57,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-12 16:39:57,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-12-12 16:39:57,938 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:39:57,938 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 127 transitions, 1106 flow. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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 16:39:57,938 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:39:57,938 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:39:57,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:39:58,412 INFO L130 PetriNetUnfolder]: 412/716 cut-off events. [2022-12-12 16:39:58,412 INFO L131 PetriNetUnfolder]: For 2652/2652 co-relation queries the response was YES. [2022-12-12 16:39:58,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3199 conditions, 716 events. 412/716 cut-off events. For 2652/2652 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3098 event pairs, 47 based on Foata normal form. 1/694 useless extension candidates. Maximal degree in co-relation 3031. Up to 559 conditions per place. [2022-12-12 16:39:58,419 INFO L137 encePairwiseOnDemand]: 7/17 looper letters, 107 selfloop transitions, 53 changer transitions 4/164 dead transitions. [2022-12-12 16:39:58,419 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 164 transitions, 1613 flow [2022-12-12 16:39:58,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-12 16:39:58,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-12 16:39:58,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 68 transitions. [2022-12-12 16:39:58,421 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4 [2022-12-12 16:39:58,421 INFO L175 Difference]: Start difference. First operand has 92 places, 127 transitions, 1106 flow. Second operand 10 states and 68 transitions. [2022-12-12 16:39:58,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 164 transitions, 1613 flow [2022-12-12 16:39:58,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 164 transitions, 1562 flow, removed 21 selfloop flow, removed 3 redundant places. [2022-12-12 16:39:58,439 INFO L231 Difference]: Finished difference. Result has 101 places, 137 transitions, 1291 flow [2022-12-12 16:39:58,439 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=1059, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1291, PETRI_PLACES=101, PETRI_TRANSITIONS=137} [2022-12-12 16:39:58,440 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 80 predicate places. [2022-12-12 16:39:58,440 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 137 transitions, 1291 flow [2022-12-12 16:39:58,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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 16:39:58,440 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:39:58,440 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:39:58,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-12 16:39:58,646 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 16:39:58,646 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:39:58,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:39:58,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1880866972, now seen corresponding path program 3 times [2022-12-12 16:39:58,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:39:58,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680010793] [2022-12-12 16:39:58,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:39:58,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:39:58,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:39:58,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:39:58,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:39:58,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680010793] [2022-12-12 16:39:58,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680010793] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:39:58,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731889958] [2022-12-12 16:39:58,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 16:39:58,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:39:58,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:39:58,982 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 16:39:58,987 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 16:39:59,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 16:39:59,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:39:59,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-12 16:39:59,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:39:59,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 16:39:59,202 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:39:59,202 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 17 treesize of output 10 [2022-12-12 16:39:59,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:39:59,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:39:59,288 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:39:59,289 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 125 treesize of output 121 [2022-12-12 16:39:59,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:39:59,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731889958] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:39:59,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:39:59,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 9 [2022-12-12 16:39:59,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508282292] [2022-12-12 16:39:59,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:39:59,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-12 16:39:59,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:39:59,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-12 16:39:59,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-12-12 16:39:59,408 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 17 [2022-12-12 16:39:59,408 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 137 transitions, 1291 flow. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:39:59,409 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:39:59,409 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 17 [2022-12-12 16:39:59,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:39:59,648 INFO L130 PetriNetUnfolder]: 404/710 cut-off events. [2022-12-12 16:39:59,649 INFO L131 PetriNetUnfolder]: For 2730/2747 co-relation queries the response was YES. [2022-12-12 16:39:59,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3326 conditions, 710 events. 404/710 cut-off events. For 2730/2747 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3161 event pairs, 59 based on Foata normal form. 15/700 useless extension candidates. Maximal degree in co-relation 3174. Up to 559 conditions per place. [2022-12-12 16:39:59,655 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 100 selfloop transitions, 40 changer transitions 4/152 dead transitions. [2022-12-12 16:39:59,655 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 152 transitions, 1636 flow [2022-12-12 16:39:59,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 16:39:59,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 16:39:59,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 46 transitions. [2022-12-12 16:39:59,656 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.45098039215686275 [2022-12-12 16:39:59,657 INFO L175 Difference]: Start difference. First operand has 101 places, 137 transitions, 1291 flow. Second operand 6 states and 46 transitions. [2022-12-12 16:39:59,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 152 transitions, 1636 flow [2022-12-12 16:39:59,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 152 transitions, 1566 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-12-12 16:39:59,673 INFO L231 Difference]: Finished difference. Result has 103 places, 138 transitions, 1320 flow [2022-12-12 16:39:59,673 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=1221, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1320, PETRI_PLACES=103, PETRI_TRANSITIONS=138} [2022-12-12 16:39:59,674 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 82 predicate places. [2022-12-12 16:39:59,674 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 138 transitions, 1320 flow [2022-12-12 16:39:59,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:39:59,674 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:39:59,674 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:39:59,687 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 16:39:59,882 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 16:39:59,883 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:39:59,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:39:59,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1148071584, now seen corresponding path program 4 times [2022-12-12 16:39:59,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:39:59,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306041435] [2022-12-12 16:39:59,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:39:59,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:39:59,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:40:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:40:00,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:40:00,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306041435] [2022-12-12 16:40:00,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306041435] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:40:00,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464526010] [2022-12-12 16:40:00,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 16:40:00,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:40:00,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:40:00,360 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 16:40:00,378 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 16:40:00,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 16:40:00,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:40:00,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-12 16:40:00,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:40:00,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 16:40:00,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 16:40:00,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-12 16:40:00,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:40:00,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:40:00,857 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:40:00,858 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 74 treesize of output 55 [2022-12-12 16:40:00,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-12-12 16:40:00,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:40:00,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464526010] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:40:00,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:40:00,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-12-12 16:40:00,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369692641] [2022-12-12 16:40:00,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:40:00,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-12 16:40:00,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:40:00,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-12 16:40:00,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=343, Unknown=2, NotChecked=0, Total=420 [2022-12-12 16:40:00,977 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:40:00,977 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 138 transitions, 1320 flow. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:40:00,977 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:40:00,977 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:40:00,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:40:07,777 INFO L130 PetriNetUnfolder]: 442/782 cut-off events. [2022-12-12 16:40:07,777 INFO L131 PetriNetUnfolder]: For 2952/2952 co-relation queries the response was YES. [2022-12-12 16:40:07,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3645 conditions, 782 events. 442/782 cut-off events. For 2952/2952 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3611 event pairs, 24 based on Foata normal form. 1/760 useless extension candidates. Maximal degree in co-relation 3492. Up to 469 conditions per place. [2022-12-12 16:40:07,784 INFO L137 encePairwiseOnDemand]: 9/17 looper letters, 100 selfloop transitions, 71 changer transitions 4/175 dead transitions. [2022-12-12 16:40:07,784 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 175 transitions, 1857 flow [2022-12-12 16:40:07,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-12 16:40:07,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-12 16:40:07,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 70 transitions. [2022-12-12 16:40:07,786 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.45751633986928103 [2022-12-12 16:40:07,786 INFO L175 Difference]: Start difference. First operand has 103 places, 138 transitions, 1320 flow. Second operand 9 states and 70 transitions. [2022-12-12 16:40:07,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 175 transitions, 1857 flow [2022-12-12 16:40:07,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 175 transitions, 1736 flow, removed 3 selfloop flow, removed 5 redundant places. [2022-12-12 16:40:07,803 INFO L231 Difference]: Finished difference. Result has 109 places, 145 transitions, 1469 flow [2022-12-12 16:40:07,803 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=1199, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1469, PETRI_PLACES=109, PETRI_TRANSITIONS=145} [2022-12-12 16:40:07,804 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 88 predicate places. [2022-12-12 16:40:07,804 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 145 transitions, 1469 flow [2022-12-12 16:40:07,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:40:07,804 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:40:07,804 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:40:07,813 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 16:40:08,009 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 16:40:08,010 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:40:08,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:40:08,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1773754872, now seen corresponding path program 5 times [2022-12-12 16:40:08,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:40:08,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565159988] [2022-12-12 16:40:08,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:40:08,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:40:08,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:40:08,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:40:08,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:40:08,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565159988] [2022-12-12 16:40:08,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565159988] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:40:08,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357947138] [2022-12-12 16:40:08,371 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 16:40:08,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:40:08,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:40:08,372 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 16:40:08,375 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 16:40:08,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 16:40:08,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:40:08,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-12 16:40:08,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:40:08,571 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 73 treesize of output 65 [2022-12-12 16:40:08,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:40:08,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:40:08,730 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:40:08,730 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 52 treesize of output 41 [2022-12-12 16:40:08,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:40:08,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357947138] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:40:08,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:40:08,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 10 [2022-12-12 16:40:08,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142411617] [2022-12-12 16:40:08,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:40:08,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-12 16:40:08,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:40:08,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-12 16:40:08,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-12-12 16:40:08,833 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:40:08,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 145 transitions, 1469 flow. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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 16:40:08,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:40:08,834 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:40:08,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:40:09,236 INFO L130 PetriNetUnfolder]: 444/791 cut-off events. [2022-12-12 16:40:09,236 INFO L131 PetriNetUnfolder]: For 3604/3604 co-relation queries the response was YES. [2022-12-12 16:40:09,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3953 conditions, 791 events. 444/791 cut-off events. For 3604/3604 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3672 event pairs, 75 based on Foata normal form. 1/769 useless extension candidates. Maximal degree in co-relation 3800. Up to 599 conditions per place. [2022-12-12 16:40:09,244 INFO L137 encePairwiseOnDemand]: 9/17 looper letters, 111 selfloop transitions, 52 changer transitions 4/167 dead transitions. [2022-12-12 16:40:09,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 167 transitions, 1886 flow [2022-12-12 16:40:09,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 16:40:09,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 16:40:09,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 57 transitions. [2022-12-12 16:40:09,245 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.41911764705882354 [2022-12-12 16:40:09,245 INFO L175 Difference]: Start difference. First operand has 109 places, 145 transitions, 1469 flow. Second operand 8 states and 57 transitions. [2022-12-12 16:40:09,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 167 transitions, 1886 flow [2022-12-12 16:40:09,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 167 transitions, 1839 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-12-12 16:40:09,263 INFO L231 Difference]: Finished difference. Result has 113 places, 146 transitions, 1550 flow [2022-12-12 16:40:09,263 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=1422, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1550, PETRI_PLACES=113, PETRI_TRANSITIONS=146} [2022-12-12 16:40:09,263 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 92 predicate places. [2022-12-12 16:40:09,263 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 146 transitions, 1550 flow [2022-12-12 16:40:09,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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 16:40:09,264 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:40:09,264 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:40:09,274 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 16:40:09,475 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 16:40:09,475 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:40:09,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:40:09,475 INFO L85 PathProgramCache]: Analyzing trace with hash 2047695166, now seen corresponding path program 6 times [2022-12-12 16:40:09,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:40:09,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093261032] [2022-12-12 16:40:09,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:40:09,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:40:09,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:40:09,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:40:09,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:40:09,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093261032] [2022-12-12 16:40:09,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093261032] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:40:09,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465306670] [2022-12-12 16:40:09,667 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 16:40:09,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:40:09,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:40:09,672 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 16:40:09,675 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 16:40:09,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 16:40:09,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:40:09,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-12 16:40:09,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:40:09,947 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-12 16:40:09,947 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 79 [2022-12-12 16:40:09,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:40:09,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:40:10,147 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:40:10,148 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 65 [2022-12-12 16:40:10,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:40:10,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465306670] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:40:10,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:40:10,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 19 [2022-12-12 16:40:10,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301579250] [2022-12-12 16:40:10,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:40:10,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 16:40:10,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:40:10,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 16:40:10,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-12-12 16:40:10,380 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:40:10,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 146 transitions, 1550 flow. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 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 16:40:10,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:40:10,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:40:10,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:40:11,823 INFO L130 PetriNetUnfolder]: 914/1613 cut-off events. [2022-12-12 16:40:11,823 INFO L131 PetriNetUnfolder]: For 5803/5803 co-relation queries the response was YES. [2022-12-12 16:40:11,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7269 conditions, 1613 events. 914/1613 cut-off events. For 5803/5803 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 8835 event pairs, 114 based on Foata normal form. 45/1581 useless extension candidates. Maximal degree in co-relation 7116. Up to 423 conditions per place. [2022-12-12 16:40:11,837 INFO L137 encePairwiseOnDemand]: 6/17 looper letters, 169 selfloop transitions, 90 changer transitions 145/404 dead transitions. [2022-12-12 16:40:11,837 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 404 transitions, 3786 flow [2022-12-12 16:40:11,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-12 16:40:11,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-12 16:40:11,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 245 transitions. [2022-12-12 16:40:11,839 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2022-12-12 16:40:11,840 INFO L175 Difference]: Start difference. First operand has 113 places, 146 transitions, 1550 flow. Second operand 35 states and 245 transitions. [2022-12-12 16:40:11,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 404 transitions, 3786 flow [2022-12-12 16:40:11,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 404 transitions, 3687 flow, removed 8 selfloop flow, removed 5 redundant places. [2022-12-12 16:40:11,872 INFO L231 Difference]: Finished difference. Result has 164 places, 161 transitions, 1894 flow [2022-12-12 16:40:11,872 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=1461, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1894, PETRI_PLACES=164, PETRI_TRANSITIONS=161} [2022-12-12 16:40:11,872 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 143 predicate places. [2022-12-12 16:40:11,873 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 161 transitions, 1894 flow [2022-12-12 16:40:11,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 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 16:40:11,873 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:40:11,873 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:40:11,878 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 16:40:12,078 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 16:40:12,078 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:40:12,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:40:12,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1950108470, now seen corresponding path program 7 times [2022-12-12 16:40:12,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:40:12,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370088361] [2022-12-12 16:40:12,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:40:12,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:40:12,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:40:12,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:40:12,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:40:12,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370088361] [2022-12-12 16:40:12,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370088361] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:40:12,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37501145] [2022-12-12 16:40:12,182 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 16:40:12,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:40:12,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:40:12,184 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 16:40:12,194 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 16:40:12,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:40:12,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-12 16:40:12,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:40:12,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 16:40:12,467 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:40:12,467 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 17 treesize of output 10 [2022-12-12 16:40:12,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:40:12,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:40:12,612 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:40:12,613 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 121 treesize of output 117 [2022-12-12 16:40:12,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:40:12,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37501145] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:40:12,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:40:12,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 21 [2022-12-12 16:40:12,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004581106] [2022-12-12 16:40:12,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:40:12,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-12 16:40:12,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:40:12,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-12 16:40:12,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-12-12 16:40:12,872 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:40:12,872 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 161 transitions, 1894 flow. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 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 16:40:12,872 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:40:12,873 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:40:12,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:40:14,245 INFO L130 PetriNetUnfolder]: 902/1720 cut-off events. [2022-12-12 16:40:14,245 INFO L131 PetriNetUnfolder]: For 19000/19000 co-relation queries the response was YES. [2022-12-12 16:40:14,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9864 conditions, 1720 events. 902/1720 cut-off events. For 19000/19000 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 10322 event pairs, 12 based on Foata normal form. 10/1637 useless extension candidates. Maximal degree in co-relation 9697. Up to 459 conditions per place. [2022-12-12 16:40:14,265 INFO L137 encePairwiseOnDemand]: 7/17 looper letters, 196 selfloop transitions, 92 changer transitions 74/362 dead transitions. [2022-12-12 16:40:14,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 362 transitions, 4415 flow [2022-12-12 16:40:14,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-12 16:40:14,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-12 16:40:14,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 171 transitions. [2022-12-12 16:40:14,267 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2958477508650519 [2022-12-12 16:40:14,267 INFO L175 Difference]: Start difference. First operand has 164 places, 161 transitions, 1894 flow. Second operand 34 states and 171 transitions. [2022-12-12 16:40:14,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 362 transitions, 4415 flow [2022-12-12 16:40:14,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 362 transitions, 3791 flow, removed 303 selfloop flow, removed 17 redundant places. [2022-12-12 16:40:14,339 INFO L231 Difference]: Finished difference. Result has 176 places, 183 transitions, 2216 flow [2022-12-12 16:40:14,339 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=1671, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2216, PETRI_PLACES=176, PETRI_TRANSITIONS=183} [2022-12-12 16:40:14,339 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 155 predicate places. [2022-12-12 16:40:14,339 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 183 transitions, 2216 flow [2022-12-12 16:40:14,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 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 16:40:14,340 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:40:14,340 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:40:14,350 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 16:40:14,550 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,SelfDestructingSolverStorable14 [2022-12-12 16:40:14,550 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:40:14,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:40:14,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1006436380, now seen corresponding path program 8 times [2022-12-12 16:40:14,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:40:14,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408200067] [2022-12-12 16:40:14,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:40:14,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:40:14,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:40:14,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:40:14,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:40:14,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408200067] [2022-12-12 16:40:14,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408200067] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:40:14,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012165526] [2022-12-12 16:40:14,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 16:40:14,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:40:14,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:40:14,672 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 16:40:14,696 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 16:40:14,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 16:40:14,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:40:14,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-12 16:40:14,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:40:15,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 16:40:15,006 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:40:15,007 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 17 treesize of output 10 [2022-12-12 16:40:15,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:40:15,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:40:15,181 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:40:15,182 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 121 treesize of output 117 [2022-12-12 16:40:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:40:15,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012165526] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:40:15,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:40:15,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 21 [2022-12-12 16:40:15,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244372182] [2022-12-12 16:40:15,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:40:15,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-12 16:40:15,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:40:15,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-12 16:40:15,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-12-12 16:40:15,384 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:40:15,385 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 183 transitions, 2216 flow. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 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 16:40:15,385 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:40:15,385 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:40:15,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:40:16,433 INFO L130 PetriNetUnfolder]: 744/1457 cut-off events. [2022-12-12 16:40:16,433 INFO L131 PetriNetUnfolder]: For 12897/12897 co-relation queries the response was YES. [2022-12-12 16:40:16,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8000 conditions, 1457 events. 744/1457 cut-off events. For 12897/12897 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 8639 event pairs, 11 based on Foata normal form. 12/1400 useless extension candidates. Maximal degree in co-relation 7944. Up to 346 conditions per place. [2022-12-12 16:40:16,446 INFO L137 encePairwiseOnDemand]: 8/17 looper letters, 153 selfloop transitions, 105 changer transitions 27/285 dead transitions. [2022-12-12 16:40:16,446 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 285 transitions, 3444 flow [2022-12-12 16:40:16,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-12 16:40:16,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-12 16:40:16,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 132 transitions. [2022-12-12 16:40:16,448 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2986425339366516 [2022-12-12 16:40:16,448 INFO L175 Difference]: Start difference. First operand has 176 places, 183 transitions, 2216 flow. Second operand 26 states and 132 transitions. [2022-12-12 16:40:16,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 285 transitions, 3444 flow [2022-12-12 16:40:16,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 285 transitions, 3068 flow, removed 60 selfloop flow, removed 23 redundant places. [2022-12-12 16:40:16,503 INFO L231 Difference]: Finished difference. Result has 171 places, 184 transitions, 2188 flow [2022-12-12 16:40:16,503 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=1833, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2188, PETRI_PLACES=171, PETRI_TRANSITIONS=184} [2022-12-12 16:40:16,503 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 150 predicate places. [2022-12-12 16:40:16,503 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 184 transitions, 2188 flow [2022-12-12 16:40:16,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 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 16:40:16,504 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:40:16,504 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:40:16,509 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 16:40:16,705 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,SelfDestructingSolverStorable15 [2022-12-12 16:40:16,705 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:40:16,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:40:16,705 INFO L85 PathProgramCache]: Analyzing trace with hash -138579557, now seen corresponding path program 2 times [2022-12-12 16:40:16,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:40:16,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744172778] [2022-12-12 16:40:16,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:40:16,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:40:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:40:16,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:40:16,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:40:16,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744172778] [2022-12-12 16:40:16,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744172778] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:40:16,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008005509] [2022-12-12 16:40:16,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 16:40:16,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:40:16,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:40:16,845 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 16:40:16,848 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 16:40:16,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 16:40:16,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:40:16,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 16:40:16,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:40:17,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:40:17,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:40:17,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:40:17,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008005509] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:40:17,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:40:17,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-12-12 16:40:17,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668157996] [2022-12-12 16:40:17,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:40:17,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-12 16:40:17,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:40:17,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-12 16:40:17,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-12-12 16:40:17,083 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:40:17,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 184 transitions, 2188 flow. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 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 16:40:17,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:40:17,083 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:40:17,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:40:17,654 INFO L130 PetriNetUnfolder]: 736/1451 cut-off events. [2022-12-12 16:40:17,655 INFO L131 PetriNetUnfolder]: For 10188/10188 co-relation queries the response was YES. [2022-12-12 16:40:17,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7471 conditions, 1451 events. 736/1451 cut-off events. For 10188/10188 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 8726 event pairs, 128 based on Foata normal form. 12/1394 useless extension candidates. Maximal degree in co-relation 7421. Up to 529 conditions per place. [2022-12-12 16:40:17,667 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 175 selfloop transitions, 107 changer transitions 2/284 dead transitions. [2022-12-12 16:40:17,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 284 transitions, 3344 flow [2022-12-12 16:40:17,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-12 16:40:17,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-12 16:40:17,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 96 transitions. [2022-12-12 16:40:17,676 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.35294117647058826 [2022-12-12 16:40:17,677 INFO L175 Difference]: Start difference. First operand has 171 places, 184 transitions, 2188 flow. Second operand 16 states and 96 transitions. [2022-12-12 16:40:17,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 284 transitions, 3344 flow [2022-12-12 16:40:17,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 284 transitions, 2914 flow, removed 99 selfloop flow, removed 20 redundant places. [2022-12-12 16:40:17,731 INFO L231 Difference]: Finished difference. Result has 162 places, 217 transitions, 2386 flow [2022-12-12 16:40:17,732 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=1819, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2386, PETRI_PLACES=162, PETRI_TRANSITIONS=217} [2022-12-12 16:40:17,732 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 141 predicate places. [2022-12-12 16:40:17,733 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 217 transitions, 2386 flow [2022-12-12 16:40:17,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 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 16:40:17,734 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:40:17,735 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:40:17,743 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 16:40:17,940 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,SelfDestructingSolverStorable16 [2022-12-12 16:40:17,941 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:40:17,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:40:17,941 INFO L85 PathProgramCache]: Analyzing trace with hash -2092165935, now seen corresponding path program 3 times [2022-12-12 16:40:17,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:40:17,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063706003] [2022-12-12 16:40:17,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:40:17,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:40:17,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:40:18,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:40:18,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:40:18,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063706003] [2022-12-12 16:40:18,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063706003] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:40:18,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326490512] [2022-12-12 16:40:18,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 16:40:18,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:40:18,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:40:18,068 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 16:40:18,078 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 16:40:18,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 16:40:18,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:40:18,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 16:40:18,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:40:18,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:40:18,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:40:18,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:40:18,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326490512] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:40:18,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:40:18,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-12-12 16:40:18,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473376496] [2022-12-12 16:40:18,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:40:18,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-12 16:40:18,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:40:18,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-12 16:40:18,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-12-12 16:40:18,452 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:40:18,452 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 217 transitions, 2386 flow. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 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 16:40:18,452 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:40:18,452 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:40:18,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:40:19,284 INFO L130 PetriNetUnfolder]: 776/1519 cut-off events. [2022-12-12 16:40:19,284 INFO L131 PetriNetUnfolder]: For 7741/7741 co-relation queries the response was YES. [2022-12-12 16:40:19,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7776 conditions, 1519 events. 776/1519 cut-off events. For 7741/7741 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 9181 event pairs, 145 based on Foata normal form. 24/1542 useless extension candidates. Maximal degree in co-relation 7726. Up to 531 conditions per place. [2022-12-12 16:40:19,295 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 176 selfloop transitions, 127 changer transitions 1/304 dead transitions. [2022-12-12 16:40:19,295 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 304 transitions, 3448 flow [2022-12-12 16:40:19,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-12 16:40:19,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-12 16:40:19,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 113 transitions. [2022-12-12 16:40:19,296 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.39100346020761245 [2022-12-12 16:40:19,296 INFO L175 Difference]: Start difference. First operand has 162 places, 217 transitions, 2386 flow. Second operand 17 states and 113 transitions. [2022-12-12 16:40:19,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 304 transitions, 3448 flow [2022-12-12 16:40:19,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 304 transitions, 3281 flow, removed 78 selfloop flow, removed 2 redundant places. [2022-12-12 16:40:19,332 INFO L231 Difference]: Finished difference. Result has 182 places, 238 transitions, 2736 flow [2022-12-12 16:40:19,332 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=2253, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2736, PETRI_PLACES=182, PETRI_TRANSITIONS=238} [2022-12-12 16:40:19,333 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 161 predicate places. [2022-12-12 16:40:19,333 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 238 transitions, 2736 flow [2022-12-12 16:40:19,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 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 16:40:19,333 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:40:19,333 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:40:19,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-12 16:40:19,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-12 16:40:19,534 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:40:19,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:40:19,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1046172992, now seen corresponding path program 9 times [2022-12-12 16:40:19,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:40:19,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787972723] [2022-12-12 16:40:19,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:40:19,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:40:19,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:40:19,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:40:19,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:40:19,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787972723] [2022-12-12 16:40:19,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787972723] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:40:19,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47778400] [2022-12-12 16:40:19,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 16:40:19,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:40:19,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:40:19,715 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 16:40:19,747 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 16:40:19,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 16:40:19,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:40:19,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-12 16:40:19,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:40:19,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-12 16:40:19,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 16:40:19,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 16:40:19,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 16:40:20,076 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-12 16:40:20,077 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 79 [2022-12-12 16:40:20,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:40:20,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:40:20,539 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:40:20,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 69 [2022-12-12 16:40:20,560 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:40:20,561 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 472 treesize of output 404 [2022-12-12 16:40:20,591 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:40:20,591 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 368 treesize of output 328 [2022-12-12 16:40:20,610 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:40:20,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 210 [2022-12-12 16:40:21,115 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-12 16:40:21,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 1 [2022-12-12 16:40:21,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:40:21,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47778400] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:40:21,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:40:21,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2022-12-12 16:40:21,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609924665] [2022-12-12 16:40:21,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:40:21,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 16:40:21,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:40:21,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 16:40:21,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=317, Unknown=2, NotChecked=0, Total=380 [2022-12-12 16:40:21,193 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:40:21,193 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 238 transitions, 2736 flow. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 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 16:40:21,193 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:40:21,193 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:40:21,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:40:22,226 INFO L130 PetriNetUnfolder]: 795/1532 cut-off events. [2022-12-12 16:40:22,226 INFO L131 PetriNetUnfolder]: For 9609/9609 co-relation queries the response was YES. [2022-12-12 16:40:22,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8388 conditions, 1532 events. 795/1532 cut-off events. For 9609/9609 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 9031 event pairs, 122 based on Foata normal form. 34/1565 useless extension candidates. Maximal degree in co-relation 8332. Up to 418 conditions per place. [2022-12-12 16:40:22,236 INFO L137 encePairwiseOnDemand]: 8/17 looper letters, 155 selfloop transitions, 65 changer transitions 95/315 dead transitions. [2022-12-12 16:40:22,236 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 315 transitions, 3845 flow [2022-12-12 16:40:22,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-12 16:40:22,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-12 16:40:22,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 120 transitions. [2022-12-12 16:40:22,237 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.41522491349480967 [2022-12-12 16:40:22,237 INFO L175 Difference]: Start difference. First operand has 182 places, 238 transitions, 2736 flow. Second operand 17 states and 120 transitions. [2022-12-12 16:40:22,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 315 transitions, 3845 flow [2022-12-12 16:40:22,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 315 transitions, 3634 flow, removed 38 selfloop flow, removed 7 redundant places. [2022-12-12 16:40:22,279 INFO L231 Difference]: Finished difference. Result has 194 places, 187 transitions, 2126 flow [2022-12-12 16:40:22,280 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=2530, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2126, PETRI_PLACES=194, PETRI_TRANSITIONS=187} [2022-12-12 16:40:22,280 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 173 predicate places. [2022-12-12 16:40:22,280 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 187 transitions, 2126 flow [2022-12-12 16:40:22,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 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 16:40:22,280 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:40:22,280 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:40:22,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-12 16:40:22,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:40:22,481 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:40:22,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:40:22,482 INFO L85 PathProgramCache]: Analyzing trace with hash -464431397, now seen corresponding path program 4 times [2022-12-12 16:40:22,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:40:22,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875384464] [2022-12-12 16:40:22,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:40:22,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:40:22,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:40:22,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:40:22,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:40:22,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875384464] [2022-12-12 16:40:22,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875384464] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:40:22,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676154346] [2022-12-12 16:40:22,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 16:40:22,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:40:22,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:40:22,644 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 16:40:22,669 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 16:40:22,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 16:40:22,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:40:22,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 16:40:22,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:40:22,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:40:22,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:40:22,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:40:22,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676154346] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:40:22,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:40:22,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-12 16:40:22,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394983152] [2022-12-12 16:40:22,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:40:22,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-12 16:40:22,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:40:22,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-12 16:40:22,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-12-12 16:40:22,959 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:40:22,959 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 187 transitions, 2126 flow. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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 16:40:22,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:40:22,960 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:40:22,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:40:23,763 INFO L130 PetriNetUnfolder]: 607/1156 cut-off events. [2022-12-12 16:40:23,763 INFO L131 PetriNetUnfolder]: For 6278/6278 co-relation queries the response was YES. [2022-12-12 16:40:23,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6128 conditions, 1156 events. 607/1156 cut-off events. For 6278/6278 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 6421 event pairs, 105 based on Foata normal form. 24/1179 useless extension candidates. Maximal degree in co-relation 6070. Up to 462 conditions per place. [2022-12-12 16:40:23,771 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 178 selfloop transitions, 115 changer transitions 0/293 dead transitions. [2022-12-12 16:40:23,771 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 293 transitions, 3357 flow [2022-12-12 16:40:23,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-12 16:40:23,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-12 16:40:23,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 138 transitions. [2022-12-12 16:40:23,776 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.40588235294117647 [2022-12-12 16:40:23,776 INFO L175 Difference]: Start difference. First operand has 194 places, 187 transitions, 2126 flow. Second operand 20 states and 138 transitions. [2022-12-12 16:40:23,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 293 transitions, 3357 flow [2022-12-12 16:40:23,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 293 transitions, 3154 flow, removed 49 selfloop flow, removed 13 redundant places. [2022-12-12 16:40:23,812 INFO L231 Difference]: Finished difference. Result has 176 places, 217 transitions, 2670 flow [2022-12-12 16:40:23,812 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=1980, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2670, PETRI_PLACES=176, PETRI_TRANSITIONS=217} [2022-12-12 16:40:23,813 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 155 predicate places. [2022-12-12 16:40:23,813 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 217 transitions, 2670 flow [2022-12-12 16:40:23,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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 16:40:23,813 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:40:23,813 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:40:23,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-12 16:40:24,018 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,SelfDestructingSolverStorable19 [2022-12-12 16:40:24,019 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:40:24,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:40:24,019 INFO L85 PathProgramCache]: Analyzing trace with hash -325903247, now seen corresponding path program 5 times [2022-12-12 16:40:24,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:40:24,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471178294] [2022-12-12 16:40:24,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:40:24,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:40:24,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:40:24,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:40:24,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:40:24,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471178294] [2022-12-12 16:40:24,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471178294] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:40:24,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508512831] [2022-12-12 16:40:24,162 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 16:40:24,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:40:24,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:40:24,163 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 16:40:24,167 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 16:40:24,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 16:40:24,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:40:24,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 16:40:24,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:40:24,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:40:24,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:40:24,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:40:24,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508512831] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:40:24,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:40:24,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-12 16:40:24,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963761960] [2022-12-12 16:40:24,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:40:24,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-12 16:40:24,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:40:24,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-12 16:40:24,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-12-12 16:40:24,456 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:40:24,457 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 217 transitions, 2670 flow. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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 16:40:24,457 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:40:24,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:40:24,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:40:25,047 INFO L130 PetriNetUnfolder]: 605/1122 cut-off events. [2022-12-12 16:40:25,047 INFO L131 PetriNetUnfolder]: For 6839/6839 co-relation queries the response was YES. [2022-12-12 16:40:25,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6344 conditions, 1122 events. 605/1122 cut-off events. For 6839/6839 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 6011 event pairs, 105 based on Foata normal form. 18/1139 useless extension candidates. Maximal degree in co-relation 6285. Up to 468 conditions per place. [2022-12-12 16:40:25,055 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 157 selfloop transitions, 112 changer transitions 0/269 dead transitions. [2022-12-12 16:40:25,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 269 transitions, 3378 flow [2022-12-12 16:40:25,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-12 16:40:25,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-12 16:40:25,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 110 transitions. [2022-12-12 16:40:25,065 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.43137254901960786 [2022-12-12 16:40:25,065 INFO L175 Difference]: Start difference. First operand has 176 places, 217 transitions, 2670 flow. Second operand 15 states and 110 transitions. [2022-12-12 16:40:25,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 269 transitions, 3378 flow [2022-12-12 16:40:25,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 269 transitions, 3114 flow, removed 78 selfloop flow, removed 9 redundant places. [2022-12-12 16:40:25,109 INFO L231 Difference]: Finished difference. Result has 182 places, 219 transitions, 2709 flow [2022-12-12 16:40:25,109 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=2338, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2709, PETRI_PLACES=182, PETRI_TRANSITIONS=219} [2022-12-12 16:40:25,111 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 161 predicate places. [2022-12-12 16:40:25,111 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 219 transitions, 2709 flow [2022-12-12 16:40:25,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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 16:40:25,111 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:40:25,111 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:40:25,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-12 16:40:25,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:40:25,318 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:40:25,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:40:25,318 INFO L85 PathProgramCache]: Analyzing trace with hash -827720361, now seen corresponding path program 6 times [2022-12-12 16:40:25,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:40:25,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003169202] [2022-12-12 16:40:25,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:40:25,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:40:25,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:40:25,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:40:25,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:40:25,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003169202] [2022-12-12 16:40:25,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003169202] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:40:25,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896389800] [2022-12-12 16:40:25,434 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 16:40:25,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:40:25,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:40:25,436 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:40:25,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-12 16:40:25,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 16:40:25,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:40:25,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 16:40:25,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:40:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:40:25,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:40:25,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:40:25,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896389800] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:40:25,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:40:25,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-12-12 16:40:25,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017398426] [2022-12-12 16:40:25,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:40:25,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-12 16:40:25,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:40:25,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-12 16:40:25,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-12-12 16:40:25,740 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:40:25,740 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 219 transitions, 2709 flow. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 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 16:40:25,740 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:40:25,740 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:40:25,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:40:26,416 INFO L130 PetriNetUnfolder]: 622/1147 cut-off events. [2022-12-12 16:40:26,416 INFO L131 PetriNetUnfolder]: For 6905/6905 co-relation queries the response was YES. [2022-12-12 16:40:26,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6357 conditions, 1147 events. 622/1147 cut-off events. For 6905/6905 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 6133 event pairs, 65 based on Foata normal form. 20/1166 useless extension candidates. Maximal degree in co-relation 6297. Up to 416 conditions per place. [2022-12-12 16:40:26,425 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 162 selfloop transitions, 114 changer transitions 0/276 dead transitions. [2022-12-12 16:40:26,425 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 276 transitions, 3545 flow [2022-12-12 16:40:26,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-12 16:40:26,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-12 16:40:26,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 94 transitions. [2022-12-12 16:40:26,427 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.34558823529411764 [2022-12-12 16:40:26,427 INFO L175 Difference]: Start difference. First operand has 182 places, 219 transitions, 2709 flow. Second operand 16 states and 94 transitions. [2022-12-12 16:40:26,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 276 transitions, 3545 flow [2022-12-12 16:40:26,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 276 transitions, 3393 flow, removed 8 selfloop flow, removed 9 redundant places. [2022-12-12 16:40:26,469 INFO L231 Difference]: Finished difference. Result has 190 places, 228 transitions, 2882 flow [2022-12-12 16:40:26,470 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=2557, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2882, PETRI_PLACES=190, PETRI_TRANSITIONS=228} [2022-12-12 16:40:26,470 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 169 predicate places. [2022-12-12 16:40:26,470 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 228 transitions, 2882 flow [2022-12-12 16:40:26,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 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 16:40:26,470 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:40:26,470 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:40:26,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-12 16:40:26,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:40:26,677 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:40:26,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:40:26,677 INFO L85 PathProgramCache]: Analyzing trace with hash 639488737, now seen corresponding path program 7 times [2022-12-12 16:40:26,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:40:26,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67360252] [2022-12-12 16:40:26,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:40:26,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:40:26,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:40:26,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:40:26,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:40:26,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67360252] [2022-12-12 16:40:26,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67360252] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:40:26,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181140511] [2022-12-12 16:40:26,857 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 16:40:26,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:40:26,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:40:26,860 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:40:26,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-12 16:40:27,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:40:27,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 16:40:27,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:40:27,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:40:27,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:40:27,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:40:27,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181140511] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:40:27,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:40:27,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-12 16:40:27,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581138301] [2022-12-12 16:40:27,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:40:27,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-12 16:40:27,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:40:27,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-12 16:40:27,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-12-12 16:40:27,266 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:40:27,267 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 228 transitions, 2882 flow. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:40:27,267 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:40:27,267 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:40:27,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:40:28,024 INFO L130 PetriNetUnfolder]: 709/1342 cut-off events. [2022-12-12 16:40:28,025 INFO L131 PetriNetUnfolder]: For 8364/8364 co-relation queries the response was YES. [2022-12-12 16:40:28,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7565 conditions, 1342 events. 709/1342 cut-off events. For 8364/8364 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 7619 event pairs, 110 based on Foata normal form. 24/1365 useless extension candidates. Maximal degree in co-relation 7503. Up to 683 conditions per place. [2022-12-12 16:40:28,034 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 189 selfloop transitions, 125 changer transitions 0/314 dead transitions. [2022-12-12 16:40:28,034 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 314 transitions, 4098 flow [2022-12-12 16:40:28,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-12 16:40:28,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-12 16:40:28,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 109 transitions. [2022-12-12 16:40:28,035 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3771626297577855 [2022-12-12 16:40:28,035 INFO L175 Difference]: Start difference. First operand has 190 places, 228 transitions, 2882 flow. Second operand 17 states and 109 transitions. [2022-12-12 16:40:28,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 314 transitions, 4098 flow [2022-12-12 16:40:28,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 314 transitions, 4017 flow, removed 28 selfloop flow, removed 5 redundant places. [2022-12-12 16:40:28,071 INFO L231 Difference]: Finished difference. Result has 206 places, 254 transitions, 3532 flow [2022-12-12 16:40:28,071 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=2782, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3532, PETRI_PLACES=206, PETRI_TRANSITIONS=254} [2022-12-12 16:40:28,071 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 185 predicate places. [2022-12-12 16:40:28,072 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 254 transitions, 3532 flow [2022-12-12 16:40:28,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:40:28,072 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:40:28,072 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:40:28,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-12 16:40:28,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-12 16:40:28,272 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:40:28,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:40:28,273 INFO L85 PathProgramCache]: Analyzing trace with hash 938542327, now seen corresponding path program 8 times [2022-12-12 16:40:28,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:40:28,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012274034] [2022-12-12 16:40:28,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:40:28,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:40:28,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:40:28,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:40:28,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:40:28,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012274034] [2022-12-12 16:40:28,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012274034] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:40:28,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128544647] [2022-12-12 16:40:28,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 16:40:28,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:40:28,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:40:28,404 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:40:28,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-12 16:40:28,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 16:40:28,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:40:28,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 16:40:28,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:40:28,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:40:28,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:40:28,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:40:28,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128544647] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:40:28,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:40:28,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-12 16:40:28,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056516592] [2022-12-12 16:40:28,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:40:28,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-12 16:40:28,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:40:28,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-12 16:40:28,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-12-12 16:40:28,752 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:40:28,752 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 254 transitions, 3532 flow. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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 16:40:28,752 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:40:28,752 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:40:28,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:40:29,328 INFO L130 PetriNetUnfolder]: 710/1315 cut-off events. [2022-12-12 16:40:29,328 INFO L131 PetriNetUnfolder]: For 10555/10555 co-relation queries the response was YES. [2022-12-12 16:40:29,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8161 conditions, 1315 events. 710/1315 cut-off events. For 10555/10555 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 7269 event pairs, 106 based on Foata normal form. 18/1332 useless extension candidates. Maximal degree in co-relation 8095. Up to 689 conditions per place. [2022-12-12 16:40:29,337 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 178 selfloop transitions, 121 changer transitions 0/299 dead transitions. [2022-12-12 16:40:29,338 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 299 transitions, 4345 flow [2022-12-12 16:40:29,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-12 16:40:29,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-12 16:40:29,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 95 transitions. [2022-12-12 16:40:29,339 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.39915966386554624 [2022-12-12 16:40:29,339 INFO L175 Difference]: Start difference. First operand has 206 places, 254 transitions, 3532 flow. Second operand 14 states and 95 transitions. [2022-12-12 16:40:29,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 299 transitions, 4345 flow [2022-12-12 16:40:29,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 299 transitions, 4257 flow, removed 33 selfloop flow, removed 6 redundant places. [2022-12-12 16:40:29,383 INFO L231 Difference]: Finished difference. Result has 214 places, 256 transitions, 3747 flow [2022-12-12 16:40:29,383 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=3339, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3747, PETRI_PLACES=214, PETRI_TRANSITIONS=256} [2022-12-12 16:40:29,384 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 193 predicate places. [2022-12-12 16:40:29,384 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 256 transitions, 3747 flow [2022-12-12 16:40:29,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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 16:40:29,384 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:40:29,384 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:40:29,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-12 16:40:29,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:40:29,585 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:40:29,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:40:29,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1096716810, now seen corresponding path program 10 times [2022-12-12 16:40:29,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:40:29,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965137150] [2022-12-12 16:40:29,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:40:29,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:40:29,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:40:29,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:40:29,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:40:29,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965137150] [2022-12-12 16:40:29,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965137150] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:40:29,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631811420] [2022-12-12 16:40:29,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 16:40:29,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:40:29,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:40:29,780 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:40:29,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-12 16:40:29,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 16:40:29,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:40:29,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 16:40:29,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:40:30,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:40:30,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:40:30,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:40:30,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631811420] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:40:30,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:40:30,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-12-12 16:40:30,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519481150] [2022-12-12 16:40:30,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:40:30,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-12 16:40:30,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:40:30,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-12 16:40:30,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-12-12 16:40:30,134 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:40:30,134 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 256 transitions, 3747 flow. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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 16:40:30,134 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:40:30,134 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:40:30,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:40:30,703 INFO L130 PetriNetUnfolder]: 627/1160 cut-off events. [2022-12-12 16:40:30,703 INFO L131 PetriNetUnfolder]: For 11235/11235 co-relation queries the response was YES. [2022-12-12 16:40:30,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7543 conditions, 1160 events. 627/1160 cut-off events. For 11235/11235 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 6216 event pairs, 45 based on Foata normal form. 58/1217 useless extension candidates. Maximal degree in co-relation 7476. Up to 290 conditions per place. [2022-12-12 16:40:30,711 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 171 selfloop transitions, 117 changer transitions 15/303 dead transitions. [2022-12-12 16:40:30,711 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 303 transitions, 4497 flow [2022-12-12 16:40:30,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-12 16:40:30,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-12 16:40:30,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 103 transitions. [2022-12-12 16:40:30,712 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.356401384083045 [2022-12-12 16:40:30,712 INFO L175 Difference]: Start difference. First operand has 214 places, 256 transitions, 3747 flow. Second operand 17 states and 103 transitions. [2022-12-12 16:40:30,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 303 transitions, 4497 flow [2022-12-12 16:40:30,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 303 transitions, 4253 flow, removed 29 selfloop flow, removed 11 redundant places. [2022-12-12 16:40:30,754 INFO L231 Difference]: Finished difference. Result has 218 places, 239 transitions, 3501 flow [2022-12-12 16:40:30,754 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=3107, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3501, PETRI_PLACES=218, PETRI_TRANSITIONS=239} [2022-12-12 16:40:30,754 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 197 predicate places. [2022-12-12 16:40:30,754 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 239 transitions, 3501 flow [2022-12-12 16:40:30,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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 16:40:30,755 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:40:30,755 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:40:30,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-12 16:40:30,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:40:30,956 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:40:30,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:40:30,956 INFO L85 PathProgramCache]: Analyzing trace with hash -700394064, now seen corresponding path program 11 times [2022-12-12 16:40:30,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:40:30,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385244357] [2022-12-12 16:40:30,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:40:30,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:40:30,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:40:31,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:40:31,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:40:31,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385244357] [2022-12-12 16:40:31,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385244357] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:40:31,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844126932] [2022-12-12 16:40:31,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 16:40:31,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:40:31,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:40:31,156 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:40:31,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-12 16:40:31,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 16:40:31,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:40:31,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 16:40:31,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:40:31,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:40:31,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:40:31,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:40:31,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844126932] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:40:31,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:40:31,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 12 [2022-12-12 16:40:31,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284899555] [2022-12-12 16:40:31,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:40:31,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-12 16:40:31,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:40:31,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-12 16:40:31,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-12-12 16:40:31,524 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:40:31,524 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 239 transitions, 3501 flow. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 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 16:40:31,524 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:40:31,524 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:40:31,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:40:32,142 INFO L130 PetriNetUnfolder]: 653/1186 cut-off events. [2022-12-12 16:40:32,143 INFO L131 PetriNetUnfolder]: For 11250/11250 co-relation queries the response was YES. [2022-12-12 16:40:32,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7892 conditions, 1186 events. 653/1186 cut-off events. For 11250/11250 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 6257 event pairs, 95 based on Foata normal form. 6/1191 useless extension candidates. Maximal degree in co-relation 7822. Up to 386 conditions per place. [2022-12-12 16:40:32,151 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 188 selfloop transitions, 106 changer transitions 3/297 dead transitions. [2022-12-12 16:40:32,151 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 297 transitions, 4590 flow [2022-12-12 16:40:32,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-12 16:40:32,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-12 16:40:32,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 85 transitions. [2022-12-12 16:40:32,152 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2022-12-12 16:40:32,152 INFO L175 Difference]: Start difference. First operand has 218 places, 239 transitions, 3501 flow. Second operand 14 states and 85 transitions. [2022-12-12 16:40:32,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 297 transitions, 4590 flow [2022-12-12 16:40:32,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 297 transitions, 4246 flow, removed 68 selfloop flow, removed 9 redundant places. [2022-12-12 16:40:32,198 INFO L231 Difference]: Finished difference. Result has 218 places, 249 transitions, 3646 flow [2022-12-12 16:40:32,198 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=3166, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3646, PETRI_PLACES=218, PETRI_TRANSITIONS=249} [2022-12-12 16:40:32,198 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 197 predicate places. [2022-12-12 16:40:32,198 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 249 transitions, 3646 flow [2022-12-12 16:40:32,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 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 16:40:32,198 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:40:32,199 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:40:32,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-12 16:40:32,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:40:32,399 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:40:32,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:40:32,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1558673948, now seen corresponding path program 12 times [2022-12-12 16:40:32,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:40:32,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986541309] [2022-12-12 16:40:32,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:40:32,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:40:32,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:40:32,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:40:32,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:40:32,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986541309] [2022-12-12 16:40:32,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986541309] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:40:32,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749782496] [2022-12-12 16:40:32,564 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 16:40:32,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:40:32,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:40:32,568 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:40:32,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-12 16:40:32,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 16:40:32,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:40:32,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 16:40:32,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:40:32,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:40:32,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:40:32,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:40:32,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749782496] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:40:32,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:40:32,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 12 [2022-12-12 16:40:32,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242783303] [2022-12-12 16:40:32,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:40:32,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-12 16:40:32,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:40:32,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-12 16:40:32,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-12-12 16:40:32,961 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:40:32,962 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 249 transitions, 3646 flow. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 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 16:40:32,962 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:40:32,962 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:40:32,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:40:33,572 INFO L130 PetriNetUnfolder]: 705/1328 cut-off events. [2022-12-12 16:40:33,573 INFO L131 PetriNetUnfolder]: For 11543/11543 co-relation queries the response was YES. [2022-12-12 16:40:33,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8422 conditions, 1328 events. 705/1328 cut-off events. For 11543/11543 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 7509 event pairs, 80 based on Foata normal form. 18/1345 useless extension candidates. Maximal degree in co-relation 8356. Up to 571 conditions per place. [2022-12-12 16:40:33,581 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 187 selfloop transitions, 132 changer transitions 1/320 dead transitions. [2022-12-12 16:40:33,581 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 320 transitions, 4808 flow [2022-12-12 16:40:33,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-12 16:40:33,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-12 16:40:33,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 93 transitions. [2022-12-12 16:40:33,582 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.45588235294117646 [2022-12-12 16:40:33,583 INFO L175 Difference]: Start difference. First operand has 218 places, 249 transitions, 3646 flow. Second operand 12 states and 93 transitions. [2022-12-12 16:40:33,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 320 transitions, 4808 flow [2022-12-12 16:40:33,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 320 transitions, 4643 flow, removed 22 selfloop flow, removed 7 redundant places. [2022-12-12 16:40:33,633 INFO L231 Difference]: Finished difference. Result has 225 places, 270 transitions, 4145 flow [2022-12-12 16:40:33,633 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=3419, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4145, PETRI_PLACES=225, PETRI_TRANSITIONS=270} [2022-12-12 16:40:33,633 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 204 predicate places. [2022-12-12 16:40:33,634 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 270 transitions, 4145 flow [2022-12-12 16:40:33,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 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 16:40:33,634 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:40:33,634 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:40:33,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-12 16:40:33,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-12 16:40:33,845 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:40:33,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:40:33,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1111768298, now seen corresponding path program 9 times [2022-12-12 16:40:33,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:40:33,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698981964] [2022-12-12 16:40:33,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:40:33,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:40:33,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:40:33,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:40:33,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:40:33,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698981964] [2022-12-12 16:40:33,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698981964] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:40:33,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286127635] [2022-12-12 16:40:33,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 16:40:33,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:40:33,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:40:33,996 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:40:33,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-12 16:40:34,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 16:40:34,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:40:34,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-12 16:40:34,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:40:34,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:40:34,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:40:34,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:40:34,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286127635] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:40:34,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:40:34,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-12-12 16:40:34,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343381846] [2022-12-12 16:40:34,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:40:34,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-12 16:40:34,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:40:34,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-12 16:40:34,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-12-12 16:40:34,288 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:40:34,289 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 270 transitions, 4145 flow. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 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 16:40:34,289 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:40:34,289 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:40:34,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:40:35,163 INFO L130 PetriNetUnfolder]: 1115/2040 cut-off events. [2022-12-12 16:40:35,163 INFO L131 PetriNetUnfolder]: For 17410/17410 co-relation queries the response was YES. [2022-12-12 16:40:35,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13286 conditions, 2040 events. 1115/2040 cut-off events. For 17410/17410 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 11924 event pairs, 13 based on Foata normal form. 8/2047 useless extension candidates. Maximal degree in co-relation 13214. Up to 471 conditions per place. [2022-12-12 16:40:35,178 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 263 selfloop transitions, 216 changer transitions 0/479 dead transitions. [2022-12-12 16:40:35,178 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 479 transitions, 7336 flow [2022-12-12 16:40:35,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-12 16:40:35,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-12 16:40:35,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 159 transitions. [2022-12-12 16:40:35,180 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.40664961636828645 [2022-12-12 16:40:35,180 INFO L175 Difference]: Start difference. First operand has 225 places, 270 transitions, 4145 flow. Second operand 23 states and 159 transitions. [2022-12-12 16:40:35,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 479 transitions, 7336 flow [2022-12-12 16:40:35,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 479 transitions, 7279 flow, removed 25 selfloop flow, removed 2 redundant places. [2022-12-12 16:40:35,257 INFO L231 Difference]: Finished difference. Result has 250 places, 350 transitions, 5645 flow [2022-12-12 16:40:35,257 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=4112, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=5645, PETRI_PLACES=250, PETRI_TRANSITIONS=350} [2022-12-12 16:40:35,257 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 229 predicate places. [2022-12-12 16:40:35,257 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 350 transitions, 5645 flow [2022-12-12 16:40:35,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 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 16:40:35,258 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:40:35,258 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:40:35,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-12 16:40:35,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-12 16:40:35,462 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:40:35,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:40:35,463 INFO L85 PathProgramCache]: Analyzing trace with hash -157286934, now seen corresponding path program 13 times [2022-12-12 16:40:35,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:40:35,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029798466] [2022-12-12 16:40:35,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:40:35,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:40:35,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:40:35,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:40:35,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:40:35,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029798466] [2022-12-12 16:40:35,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029798466] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:40:35,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326061044] [2022-12-12 16:40:35,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 16:40:35,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:40:35,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:40:35,660 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:40:35,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-12 16:40:35,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:40:35,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 16:40:35,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:40:35,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:40:35,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:40:36,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:40:36,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326061044] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:40:36,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:40:36,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2022-12-12 16:40:36,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241719645] [2022-12-12 16:40:36,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:40:36,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-12 16:40:36,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:40:36,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-12 16:40:36,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-12-12 16:40:36,042 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:40:36,042 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 350 transitions, 5645 flow. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 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 16:40:36,042 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:40:36,042 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:40:36,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:40:36,743 INFO L130 PetriNetUnfolder]: 1106/2033 cut-off events. [2022-12-12 16:40:36,743 INFO L131 PetriNetUnfolder]: For 20146/20146 co-relation queries the response was YES. [2022-12-12 16:40:36,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14075 conditions, 2033 events. 1106/2033 cut-off events. For 20146/20146 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 11959 event pairs, 209 based on Foata normal form. 6/2038 useless extension candidates. Maximal degree in co-relation 13997. Up to 1046 conditions per place. [2022-12-12 16:40:36,760 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 292 selfloop transitions, 97 changer transitions 3/392 dead transitions. [2022-12-12 16:40:36,760 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 392 transitions, 6737 flow [2022-12-12 16:40:36,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-12 16:40:36,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-12 16:40:36,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 70 transitions. [2022-12-12 16:40:36,762 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3167420814479638 [2022-12-12 16:40:36,762 INFO L175 Difference]: Start difference. First operand has 250 places, 350 transitions, 5645 flow. Second operand 13 states and 70 transitions. [2022-12-12 16:40:36,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 392 transitions, 6737 flow [2022-12-12 16:40:36,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 392 transitions, 6401 flow, removed 125 selfloop flow, removed 4 redundant places. [2022-12-12 16:40:36,852 INFO L231 Difference]: Finished difference. Result has 258 places, 345 transitions, 5467 flow [2022-12-12 16:40:36,852 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=5265, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5467, PETRI_PLACES=258, PETRI_TRANSITIONS=345} [2022-12-12 16:40:36,853 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 237 predicate places. [2022-12-12 16:40:36,853 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 345 transitions, 5467 flow [2022-12-12 16:40:36,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 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 16:40:36,853 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:40:36,853 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:40:36,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-12 16:40:37,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-12 16:40:37,058 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:40:37,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:40:37,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1314620408, now seen corresponding path program 14 times [2022-12-12 16:40:37,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:40:37,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717234596] [2022-12-12 16:40:37,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:40:37,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:40:37,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:40:37,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:40:37,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:40:37,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717234596] [2022-12-12 16:40:37,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717234596] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:40:37,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537175280] [2022-12-12 16:40:37,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 16:40:37,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:40:37,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:40:37,250 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:40:37,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-12 16:40:37,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 16:40:37,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:40:37,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 16:40:37,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:40:37,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:40:37,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:40:50,914 WARN L233 SmtUtils]: Spent 13.08s on a formula simplification. DAG size of input: 5023 DAG size of output: 4690 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Received shutdown request... [2022-12-12 16:53:51,817 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 16:53:51,837 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 16:53:51,965 WARN L249 SmtUtils]: Removed 2 from assertion stack [2022-12-12 16:53:51,966 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-12-12 16:53:51,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-12 16:53:52,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:53:52,167 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 25 for 44ms.. [2022-12-12 16:53:52,169 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-12-12 16:53:52,169 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-12-12 16:53:52,169 INFO L445 BasicCegarLoop]: Path program histogram: [14, 9, 6, 1] [2022-12-12 16:53:52,172 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-12 16:53:52,172 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-12 16:53:52,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.12 04:53:52 BasicIcfg [2022-12-12 16:53:52,173 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-12 16:53:52,174 INFO L158 Benchmark]: Toolchain (without parser) took 858725.37ms. Allocated memory was 235.9MB in the beginning and 669.0MB in the end (delta: 433.1MB). Free memory was 213.6MB in the beginning and 274.5MB in the end (delta: -60.8MB). Peak memory consumption was 422.5MB. Max. memory is 8.0GB. [2022-12-12 16:53:52,174 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 235.9MB. Free memory was 214.9MB in the beginning and 214.8MB in the end (delta: 70.6kB). There was no memory consumed. Max. memory is 8.0GB. [2022-12-12 16:53:52,174 INFO L158 Benchmark]: CACSL2BoogieTranslator took 290.11ms. Allocated memory is still 235.9MB. Free memory was 213.6MB in the beginning and 202.1MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-12-12 16:53:52,174 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.01ms. Allocated memory is still 235.9MB. Free memory was 202.1MB in the beginning and 200.5MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-12-12 16:53:52,175 INFO L158 Benchmark]: Boogie Preprocessor took 39.41ms. Allocated memory is still 235.9MB. Free memory was 200.5MB in the beginning and 198.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-12 16:53:52,175 INFO L158 Benchmark]: RCFGBuilder took 472.91ms. Allocated memory is still 235.9MB. Free memory was 198.5MB in the beginning and 182.6MB in the end (delta: 15.8MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. [2022-12-12 16:53:52,175 INFO L158 Benchmark]: TraceAbstraction took 857865.08ms. Allocated memory was 235.9MB in the beginning and 669.0MB in the end (delta: 433.1MB). Free memory was 181.1MB in the beginning and 274.5MB in the end (delta: -93.4MB). Peak memory consumption was 390.0MB. Max. memory is 8.0GB. [2022-12-12 16:53:52,176 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 235.9MB. Free memory was 214.9MB in the beginning and 214.8MB in the end (delta: 70.6kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 290.11ms. Allocated memory is still 235.9MB. Free memory was 213.6MB in the beginning and 202.1MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 50.01ms. Allocated memory is still 235.9MB. Free memory was 202.1MB in the beginning and 200.5MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 39.41ms. Allocated memory is still 235.9MB. Free memory was 200.5MB in the beginning and 198.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 472.91ms. Allocated memory is still 235.9MB. Free memory was 198.5MB in the beginning and 182.6MB in the end (delta: 15.8MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. * TraceAbstraction took 857865.08ms. Allocated memory was 235.9MB in the beginning and 669.0MB in the end (delta: 433.1MB). Free memory was 181.1MB in the beginning and 274.5MB in the end (delta: -93.4MB). Peak memory consumption was 390.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.8s, 145 PlacesBefore, 21 PlacesAfterwards, 153 TransitionsBefore, 17 TransitionsAfterwards, 2692 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 64 TrivialYvCompositions, 60 ConcurrentYvCompositions, 11 ChoiceCompositions, 135 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 1661, independent: 1657, independent conditional: 1657, independent unconditional: 0, dependent: 4, dependent conditional: 4, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 1661, independent: 1657, independent conditional: 0, independent unconditional: 1657, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 1661, independent: 1657, independent conditional: 0, independent unconditional: 1657, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 1661, independent: 1657, independent conditional: 0, independent unconditional: 1657, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1503, independent: 1499, independent conditional: 0, independent unconditional: 1499, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1503, independent: 1499, independent conditional: 0, independent unconditional: 1499, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 4, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 14, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1661, independent: 158, independent conditional: 0, independent unconditional: 158, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 1503, unknown conditional: 0, unknown unconditional: 1503] , Statistics on independence cache: Total cache size (in pairs): 2919, Positive cache size: 2915, Positive conditional cache size: 0, Positive unconditional cache size: 2915, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1 - TimeoutResultAtElement [Line: 91]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 25 for 44ms.. - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 25 for 44ms.. - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 25 for 44ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 210 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 857.7s, OverallIterations: 30, TraceHistogramMax: 2, PathProgramHistogramMax: 14, EmptinessCheckTime: 0.0s, AutomataDifference: 34.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.1s, HoareTripleCheckerStatistics: 6 mSolverCounterUnknown, 2490 SdHoareTripleChecker+Valid, 8.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2490 mSDsluCounter, 571 SdHoareTripleChecker+Invalid, 7.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 447 mSDsCounter, 528 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9520 IncrementalHoareTripleChecker+Invalid, 10054 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 528 mSolverCounterUnsat, 124 mSDtfsCounter, 9520 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1278 GetRequests, 725 SyntacticMatches, 17 SemanticMatches, 536 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3089 ImplicationChecksByTransitivity, 24.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5645occurred in iteration=28, InterpolantAutomatonStates: 423, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 14.9s InterpolantComputationTime, 850 NumberOfCodeBlocks, 850 NumberOfCodeBlocksAsserted, 68 NumberOfCheckSat, 1150 ConstructedInterpolants, 15 QuantifiedInterpolants, 11256 SizeOfPredicates, 266 NumberOfNonLiveVariables, 3772 ConjunctsInSsa, 411 ConjunctsInUnsatCore, 73 InterpolantComputations, 7 PerfectInterpolantSequences, 161/264 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown