/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/array-eq-symm.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 15:02:28,781 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 15:02:28,782 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 15:02:28,814 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 15:02:28,814 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 15:02:28,816 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 15:02:28,819 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 15:02:28,822 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 15:02:28,825 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 15:02:28,828 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 15:02:28,829 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 15:02:28,832 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 15:02:28,832 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 15:02:28,834 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 15:02:28,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 15:02:28,838 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 15:02:28,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 15:02:28,839 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 15:02:28,840 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 15:02:28,844 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 15:02:28,845 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 15:02:28,846 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 15:02:28,847 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 15:02:28,847 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 15:02:28,849 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 15:02:28,849 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 15:02:28,849 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 15:02:28,850 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 15:02:28,850 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 15:02:28,850 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 15:02:28,851 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 15:02:28,851 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 15:02:28,851 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 15:02:28,852 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 15:02:28,852 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 15:02:28,852 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 15:02:28,853 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 15:02:28,853 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 15:02:28,853 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 15:02:28,854 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 15:02:28,854 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 15:02:28,860 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 15:02:28,885 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 15:02:28,886 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 15:02:28,887 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 15:02:28,887 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 15:02:28,887 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 15:02:28,888 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 15:02:28,888 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 15:02:28,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 15:02:28,888 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 15:02:28,888 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 15:02:28,889 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 15:02:28,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 15:02:28,889 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 15:02:28,889 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 15:02:28,889 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 15:02:28,889 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 15:02:28,889 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 15:02:28,889 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 15:02:28,889 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 15:02:28,890 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 15:02:28,890 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 15:02:28,890 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 15:02:28,890 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 15:02:28,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 15:02:28,890 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 15:02:28,890 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 15:02:28,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 15:02:28,890 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 15:02:28,890 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 15:02:28,890 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 15:02:28,890 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-12 15:02:29,202 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 15:02:29,219 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 15:02:29,221 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 15:02:29,221 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 15:02:29,235 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 15:02:29,236 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2022-12-12 15:02:30,209 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 15:02:30,425 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 15:02:30,425 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2022-12-12 15:02:30,430 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79636b5d3/bc8b3e153b2b4318863ea598119484b6/FLAG5a387798a [2022-12-12 15:02:30,441 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79636b5d3/bc8b3e153b2b4318863ea598119484b6 [2022-12-12 15:02:30,443 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 15:02:30,444 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 15:02:30,445 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 15:02:30,445 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 15:02:30,446 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 15:02:30,447 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 03:02:30" (1/1) ... [2022-12-12 15:02:30,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ebcda73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:02:30, skipping insertion in model container [2022-12-12 15:02:30,448 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 03:02:30" (1/1) ... [2022-12-12 15:02:30,452 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 15:02:30,469 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 15:02:30,584 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/array-eq-symm.wvr.c[2251,2264] [2022-12-12 15:02:30,601 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 15:02:30,611 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 15:02:30,634 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/array-eq-symm.wvr.c[2251,2264] [2022-12-12 15:02:30,642 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 15:02:30,653 INFO L208 MainTranslator]: Completed translation [2022-12-12 15:02:30,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:02:30 WrapperNode [2022-12-12 15:02:30,654 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 15:02:30,655 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 15:02:30,655 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 15:02:30,656 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 15:02:30,660 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:02:30" (1/1) ... [2022-12-12 15:02:30,672 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:02:30" (1/1) ... [2022-12-12 15:02:30,694 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 112 [2022-12-12 15:02:30,695 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 15:02:30,695 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 15:02:30,695 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 15:02:30,696 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 15:02:30,701 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:02:30" (1/1) ... [2022-12-12 15:02:30,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:02:30" (1/1) ... [2022-12-12 15:02:30,711 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:02:30" (1/1) ... [2022-12-12 15:02:30,712 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:02:30" (1/1) ... [2022-12-12 15:02:30,722 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:02:30" (1/1) ... [2022-12-12 15:02:30,725 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:02:30" (1/1) ... [2022-12-12 15:02:30,725 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:02:30" (1/1) ... [2022-12-12 15:02:30,726 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:02:30" (1/1) ... [2022-12-12 15:02:30,727 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 15:02:30,728 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 15:02:30,728 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 15:02:30,728 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 15:02:30,729 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:02:30" (1/1) ... [2022-12-12 15:02:30,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 15:02:30,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:02:30,756 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 15:02:30,773 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 15:02:30,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 15:02:30,785 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-12 15:02:30,785 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-12 15:02:30,785 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-12 15:02:30,785 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-12 15:02:30,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 15:02:30,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 15:02:30,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 15:02:30,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-12 15:02:30,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 15:02:30,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 15:02:30,786 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-12 15:02:30,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 15:02:30,787 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 15:02:30,911 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 15:02:30,912 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 15:02:31,120 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 15:02:31,129 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 15:02:31,129 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-12 15:02:31,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 03:02:31 BoogieIcfgContainer [2022-12-12 15:02:31,131 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 15:02:31,133 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 15:02:31,133 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 15:02:31,137 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 15:02:31,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 03:02:30" (1/3) ... [2022-12-12 15:02:31,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@135683e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 03:02:31, skipping insertion in model container [2022-12-12 15:02:31,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:02:30" (2/3) ... [2022-12-12 15:02:31,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@135683e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 03:02:31, skipping insertion in model container [2022-12-12 15:02:31,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 03:02:31" (3/3) ... [2022-12-12 15:02:31,140 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2022-12-12 15:02:31,152 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 15:02:31,152 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 15:02:31,153 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 15:02:31,238 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-12 15:02:31,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 159 transitions, 334 flow [2022-12-12 15:02:31,347 INFO L130 PetriNetUnfolder]: 15/157 cut-off events. [2022-12-12 15:02:31,348 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 15:02:31,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 157 events. 15/157 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 122 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 118. Up to 3 conditions per place. [2022-12-12 15:02:31,351 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 159 transitions, 334 flow [2022-12-12 15:02:31,355 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 149 transitions, 310 flow [2022-12-12 15:02:31,356 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-12 15:02:31,368 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 141 places, 149 transitions, 310 flow [2022-12-12 15:02:31,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 149 transitions, 310 flow [2022-12-12 15:02:31,413 INFO L130 PetriNetUnfolder]: 15/149 cut-off events. [2022-12-12 15:02:31,414 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 15:02:31,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 149 events. 15/149 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 121 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 118. Up to 3 conditions per place. [2022-12-12 15:02:31,418 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 141 places, 149 transitions, 310 flow [2022-12-12 15:02:31,418 INFO L226 LiptonReduction]: Number of co-enabled transitions 992 [2022-12-12 15:02:35,511 INFO L241 LiptonReduction]: Total number of compositions: 129 [2022-12-12 15:02:35,526 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 15:02:35,530 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;@128741d1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 15:02:35,530 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-12 15:02:35,537 INFO L130 PetriNetUnfolder]: 5/18 cut-off events. [2022-12-12 15:02:35,538 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 15:02:35,538 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:02:35,538 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:02:35,538 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 15:02:35,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:02:35,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1749098858, now seen corresponding path program 1 times [2022-12-12 15:02:35,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:02:35,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417878945] [2022-12-12 15:02:35,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:02:35,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:02:35,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:02:36,126 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 15:02:36,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:02:36,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417878945] [2022-12-12 15:02:36,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417878945] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:02:36,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:02:36,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 15:02:36,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601494693] [2022-12-12 15:02:36,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:02:36,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 15:02:36,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:02:36,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 15:02:36,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 15:02:36,147 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:02:36,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 19 transitions, 50 flow. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 15:02:36,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:02:36,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:02:36,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:02:36,249 INFO L130 PetriNetUnfolder]: 81/151 cut-off events. [2022-12-12 15:02:36,249 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-12 15:02:36,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 151 events. 81/151 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 394 event pairs, 24 based on Foata normal form. 2/109 useless extension candidates. Maximal degree in co-relation 204. Up to 73 conditions per place. [2022-12-12 15:02:36,251 INFO L137 encePairwiseOnDemand]: 12/19 looper letters, 27 selfloop transitions, 4 changer transitions 13/44 dead transitions. [2022-12-12 15:02:36,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 44 transitions, 209 flow [2022-12-12 15:02:36,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 15:02:36,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 15:02:36,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 48 transitions. [2022-12-12 15:02:36,259 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5052631578947369 [2022-12-12 15:02:36,260 INFO L175 Difference]: Start difference. First operand has 21 places, 19 transitions, 50 flow. Second operand 5 states and 48 transitions. [2022-12-12 15:02:36,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 44 transitions, 209 flow [2022-12-12 15:02:36,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 44 transitions, 187 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-12 15:02:36,263 INFO L231 Difference]: Finished difference. Result has 24 places, 22 transitions, 77 flow [2022-12-12 15:02:36,264 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=77, PETRI_PLACES=24, PETRI_TRANSITIONS=22} [2022-12-12 15:02:36,266 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 3 predicate places. [2022-12-12 15:02:36,266 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 22 transitions, 77 flow [2022-12-12 15:02:36,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 15:02:36,266 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:02:36,267 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:02:36,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 15:02:36,267 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 15:02:36,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:02:36,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1491545528, now seen corresponding path program 1 times [2022-12-12 15:02:36,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:02:36,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300438869] [2022-12-12 15:02:36,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:02:36,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:02:36,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:02:36,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 15:02:36,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:02:36,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300438869] [2022-12-12 15:02:36,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300438869] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:02:36,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:02:36,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 15:02:36,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355722726] [2022-12-12 15:02:36,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:02:36,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 15:02:36,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:02:36,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 15:02:36,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-12 15:02:36,332 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:02:36,332 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 22 transitions, 77 flow. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 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 15:02:36,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:02:36,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:02:36,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:02:36,401 INFO L130 PetriNetUnfolder]: 150/268 cut-off events. [2022-12-12 15:02:36,401 INFO L131 PetriNetUnfolder]: For 93/93 co-relation queries the response was YES. [2022-12-12 15:02:36,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 683 conditions, 268 events. 150/268 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 852 event pairs, 70 based on Foata normal form. 16/281 useless extension candidates. Maximal degree in co-relation 664. Up to 106 conditions per place. [2022-12-12 15:02:36,403 INFO L137 encePairwiseOnDemand]: 14/19 looper letters, 43 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2022-12-12 15:02:36,403 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 49 transitions, 258 flow [2022-12-12 15:02:36,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 15:02:36,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 15:02:36,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 46 transitions. [2022-12-12 15:02:36,404 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4842105263157895 [2022-12-12 15:02:36,404 INFO L175 Difference]: Start difference. First operand has 24 places, 22 transitions, 77 flow. Second operand 5 states and 46 transitions. [2022-12-12 15:02:36,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 49 transitions, 258 flow [2022-12-12 15:02:36,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 49 transitions, 246 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-12-12 15:02:36,405 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 109 flow [2022-12-12 15:02:36,406 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=109, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2022-12-12 15:02:36,406 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 8 predicate places. [2022-12-12 15:02:36,406 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 109 flow [2022-12-12 15:02:36,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 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 15:02:36,406 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:02:36,407 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:02:36,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-12 15:02:36,407 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 15:02:36,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:02:36,407 INFO L85 PathProgramCache]: Analyzing trace with hash 59164005, now seen corresponding path program 1 times [2022-12-12 15:02:36,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:02:36,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398532950] [2022-12-12 15:02:36,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:02:36,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:02:36,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:02:36,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 15:02:36,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:02:36,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398532950] [2022-12-12 15:02:36,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398532950] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:02:36,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:02:36,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 15:02:36,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738115967] [2022-12-12 15:02:36,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:02:36,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 15:02:36,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:02:36,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 15:02:36,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-12 15:02:36,469 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:02:36,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 109 flow. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 15:02:36,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:02:36,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:02:36,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:02:36,533 INFO L130 PetriNetUnfolder]: 132/238 cut-off events. [2022-12-12 15:02:36,533 INFO L131 PetriNetUnfolder]: For 158/158 co-relation queries the response was YES. [2022-12-12 15:02:36,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 671 conditions, 238 events. 132/238 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 718 event pairs, 54 based on Foata normal form. 6/243 useless extension candidates. Maximal degree in co-relation 647. Up to 113 conditions per place. [2022-12-12 15:02:36,534 INFO L137 encePairwiseOnDemand]: 13/19 looper letters, 32 selfloop transitions, 5 changer transitions 10/47 dead transitions. [2022-12-12 15:02:36,534 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 47 transitions, 268 flow [2022-12-12 15:02:36,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 15:02:36,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 15:02:36,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 44 transitions. [2022-12-12 15:02:36,535 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4631578947368421 [2022-12-12 15:02:36,535 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 109 flow. Second operand 5 states and 44 transitions. [2022-12-12 15:02:36,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 47 transitions, 268 flow [2022-12-12 15:02:36,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 47 transitions, 258 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-12-12 15:02:36,537 INFO L231 Difference]: Finished difference. Result has 33 places, 25 transitions, 119 flow [2022-12-12 15:02:36,537 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=119, PETRI_PLACES=33, PETRI_TRANSITIONS=25} [2022-12-12 15:02:36,538 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 12 predicate places. [2022-12-12 15:02:36,538 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 25 transitions, 119 flow [2022-12-12 15:02:36,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 15:02:36,538 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:02:36,538 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:02:36,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-12 15:02:36,538 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 15:02:36,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:02:36,539 INFO L85 PathProgramCache]: Analyzing trace with hash -101651419, now seen corresponding path program 1 times [2022-12-12 15:02:36,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:02:36,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164000083] [2022-12-12 15:02:36,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:02:36,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:02:36,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:02:36,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 15:02:36,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:02:36,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164000083] [2022-12-12 15:02:36,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164000083] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:02:36,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849952546] [2022-12-12 15:02:36,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:02:36,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:02:36,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:02:36,645 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 15:02:36,684 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 15:02:36,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:02:36,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-12 15:02:36,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:02:36,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 15:02:36,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:02:36,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 15:02:36,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849952546] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 15:02:36,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 15:02:36,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 13 [2022-12-12 15:02:36,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331639633] [2022-12-12 15:02:36,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:02:36,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-12 15:02:36,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:02:36,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-12 15:02:36,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-12-12 15:02:36,892 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:02:36,893 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 25 transitions, 119 flow. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 15:02:36,893 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:02:36,893 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:02:36,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:02:37,006 INFO L130 PetriNetUnfolder]: 125/235 cut-off events. [2022-12-12 15:02:37,006 INFO L131 PetriNetUnfolder]: For 236/236 co-relation queries the response was YES. [2022-12-12 15:02:37,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 709 conditions, 235 events. 125/235 cut-off events. For 236/236 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 750 event pairs, 41 based on Foata normal form. 10/244 useless extension candidates. Maximal degree in co-relation 681. Up to 85 conditions per place. [2022-12-12 15:02:37,008 INFO L137 encePairwiseOnDemand]: 12/19 looper letters, 38 selfloop transitions, 8 changer transitions 0/46 dead transitions. [2022-12-12 15:02:37,008 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 46 transitions, 285 flow [2022-12-12 15:02:37,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 15:02:37,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 15:02:37,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 43 transitions. [2022-12-12 15:02:37,009 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3233082706766917 [2022-12-12 15:02:37,009 INFO L175 Difference]: Start difference. First operand has 33 places, 25 transitions, 119 flow. Second operand 7 states and 43 transitions. [2022-12-12 15:02:37,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 46 transitions, 285 flow [2022-12-12 15:02:37,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 46 transitions, 276 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-12-12 15:02:37,010 INFO L231 Difference]: Finished difference. Result has 36 places, 26 transitions, 144 flow [2022-12-12 15:02:37,010 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=144, PETRI_PLACES=36, PETRI_TRANSITIONS=26} [2022-12-12 15:02:37,011 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 15 predicate places. [2022-12-12 15:02:37,011 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 26 transitions, 144 flow [2022-12-12 15:02:37,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 15:02:37,011 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:02:37,011 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:02:37,019 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 15:02:37,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:02:37,216 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 15:02:37,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:02:37,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1811020300, now seen corresponding path program 1 times [2022-12-12 15:02:37,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:02:37,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779410380] [2022-12-12 15:02:37,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:02:37,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:02:37,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:02:37,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:02:37,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:02:37,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779410380] [2022-12-12 15:02:37,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779410380] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:02:37,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314380462] [2022-12-12 15:02:37,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:02:37,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:02:37,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:02:37,762 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 15:02:37,788 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 15:02:37,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:02:37,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-12 15:02:37,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:02:38,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:02:38,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:02:38,145 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-12 15:02:38,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-12-12 15:02:38,164 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 15:02:38,164 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 20 treesize of output 4 [2022-12-12 15:02:38,169 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 15:02:38,169 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 20 treesize of output 4 [2022-12-12 15:02:38,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:02:38,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314380462] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 15:02:38,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 15:02:38,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 18 [2022-12-12 15:02:38,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635785868] [2022-12-12 15:02:38,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:02:38,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-12 15:02:38,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:02:38,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-12 15:02:38,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-12-12 15:02:38,273 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:02:38,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 26 transitions, 144 flow. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 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 15:02:38,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:02:38,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:02:38,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:02:38,471 INFO L130 PetriNetUnfolder]: 138/255 cut-off events. [2022-12-12 15:02:38,472 INFO L131 PetriNetUnfolder]: For 318/318 co-relation queries the response was YES. [2022-12-12 15:02:38,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 818 conditions, 255 events. 138/255 cut-off events. For 318/318 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 852 event pairs, 30 based on Foata normal form. 2/256 useless extension candidates. Maximal degree in co-relation 787. Up to 198 conditions per place. [2022-12-12 15:02:38,473 INFO L137 encePairwiseOnDemand]: 9/19 looper letters, 29 selfloop transitions, 11 changer transitions 4/44 dead transitions. [2022-12-12 15:02:38,473 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 44 transitions, 288 flow [2022-12-12 15:02:38,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 15:02:38,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 15:02:38,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 42 transitions. [2022-12-12 15:02:38,474 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.27631578947368424 [2022-12-12 15:02:38,474 INFO L175 Difference]: Start difference. First operand has 36 places, 26 transitions, 144 flow. Second operand 8 states and 42 transitions. [2022-12-12 15:02:38,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 44 transitions, 288 flow [2022-12-12 15:02:38,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 44 transitions, 270 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-12-12 15:02:38,476 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 195 flow [2022-12-12 15:02:38,476 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=195, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2022-12-12 15:02:38,476 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 21 predicate places. [2022-12-12 15:02:38,476 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 195 flow [2022-12-12 15:02:38,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 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 15:02:38,477 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:02:38,477 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:02:38,495 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 15:02:38,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:02:38,698 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 15:02:38,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:02:38,699 INFO L85 PathProgramCache]: Analyzing trace with hash 506147494, now seen corresponding path program 2 times [2022-12-12 15:02:38,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:02:38,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112111990] [2022-12-12 15:02:38,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:02:38,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:02:38,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:02:39,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:02:39,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:02:39,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112111990] [2022-12-12 15:02:39,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112111990] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:02:39,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346444673] [2022-12-12 15:02:39,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 15:02:39,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:02:39,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:02:39,193 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 15:02:39,196 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 15:02:39,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 15:02:39,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:02:39,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-12 15:02:39,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:02:39,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:02:39,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:02:39,538 INFO L321 Elim1Store]: treesize reduction 11, result has 87.1 percent of original size [2022-12-12 15:02:39,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 88 [2022-12-12 15:02:39,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:02:39,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346444673] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 15:02:39,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 15:02:39,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 19 [2022-12-12 15:02:39,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651393582] [2022-12-12 15:02:39,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:02:39,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-12 15:02:39,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:02:39,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-12 15:02:39,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-12-12 15:02:39,701 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:02:39,702 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 195 flow. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 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 15:02:39,702 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:02:39,702 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:02:39,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:02:39,855 INFO L130 PetriNetUnfolder]: 133/248 cut-off events. [2022-12-12 15:02:39,855 INFO L131 PetriNetUnfolder]: For 396/396 co-relation queries the response was YES. [2022-12-12 15:02:39,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 927 conditions, 248 events. 133/248 cut-off events. For 396/396 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 815 event pairs, 35 based on Foata normal form. 2/249 useless extension candidates. Maximal degree in co-relation 894. Up to 196 conditions per place. [2022-12-12 15:02:39,856 INFO L137 encePairwiseOnDemand]: 10/19 looper letters, 30 selfloop transitions, 10 changer transitions 7/47 dead transitions. [2022-12-12 15:02:39,856 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 47 transitions, 358 flow [2022-12-12 15:02:39,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 15:02:39,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 15:02:39,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 41 transitions. [2022-12-12 15:02:39,857 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.26973684210526316 [2022-12-12 15:02:39,857 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 195 flow. Second operand 8 states and 41 transitions. [2022-12-12 15:02:39,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 47 transitions, 358 flow [2022-12-12 15:02:39,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 47 transitions, 326 flow, removed 7 selfloop flow, removed 6 redundant places. [2022-12-12 15:02:39,859 INFO L231 Difference]: Finished difference. Result has 45 places, 33 transitions, 220 flow [2022-12-12 15:02:39,859 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=220, PETRI_PLACES=45, PETRI_TRANSITIONS=33} [2022-12-12 15:02:39,860 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 24 predicate places. [2022-12-12 15:02:39,860 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 33 transitions, 220 flow [2022-12-12 15:02:39,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 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 15:02:39,860 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:02:39,860 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:02:39,884 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 15:02:40,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:02:40,081 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 15:02:40,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:02:40,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1637274486, now seen corresponding path program 3 times [2022-12-12 15:02:40,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:02:40,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460143757] [2022-12-12 15:02:40,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:02:40,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:02:40,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:02:40,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:02:40,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:02:40,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460143757] [2022-12-12 15:02:40,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460143757] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:02:40,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280803287] [2022-12-12 15:02:40,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 15:02:40,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:02:40,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:02:40,685 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 15:02:40,687 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 15:02:40,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 15:02:40,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:02:40,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-12 15:02:40,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:02:40,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:02:40,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:02:41,114 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-12 15:02:41,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-12-12 15:02:41,130 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 15:02:41,130 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 20 treesize of output 4 [2022-12-12 15:02:41,136 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 15:02:41,136 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 20 treesize of output 4 [2022-12-12 15:02:41,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:02:41,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280803287] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:02:41,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:02:41,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2022-12-12 15:02:41,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464907830] [2022-12-12 15:02:41,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:02:41,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 15:02:41,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:02:41,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 15:02:41,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-12-12 15:02:41,234 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:02:41,234 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 33 transitions, 220 flow. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:02:41,234 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:02:41,234 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:02:41,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:02:41,494 INFO L130 PetriNetUnfolder]: 150/279 cut-off events. [2022-12-12 15:02:41,494 INFO L131 PetriNetUnfolder]: For 459/459 co-relation queries the response was YES. [2022-12-12 15:02:41,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1088 conditions, 279 events. 150/279 cut-off events. For 459/459 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 954 event pairs, 12 based on Foata normal form. 12/290 useless extension candidates. Maximal degree in co-relation 1054. Up to 200 conditions per place. [2022-12-12 15:02:41,496 INFO L137 encePairwiseOnDemand]: 8/19 looper letters, 35 selfloop transitions, 15 changer transitions 1/51 dead transitions. [2022-12-12 15:02:41,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 51 transitions, 388 flow [2022-12-12 15:02:41,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-12 15:02:41,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-12 15:02:41,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 48 transitions. [2022-12-12 15:02:41,497 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2807017543859649 [2022-12-12 15:02:41,497 INFO L175 Difference]: Start difference. First operand has 45 places, 33 transitions, 220 flow. Second operand 9 states and 48 transitions. [2022-12-12 15:02:41,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 51 transitions, 388 flow [2022-12-12 15:02:41,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 51 transitions, 374 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-12-12 15:02:41,499 INFO L231 Difference]: Finished difference. Result has 48 places, 35 transitions, 257 flow [2022-12-12 15:02:41,499 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=257, PETRI_PLACES=48, PETRI_TRANSITIONS=35} [2022-12-12 15:02:41,500 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 27 predicate places. [2022-12-12 15:02:41,500 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 35 transitions, 257 flow [2022-12-12 15:02:41,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:02:41,500 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:02:41,500 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:02:41,514 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 15:02:41,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:02:41,705 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 15:02:41,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:02:41,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1927272387, now seen corresponding path program 1 times [2022-12-12 15:02:41,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:02:41,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855415837] [2022-12-12 15:02:41,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:02:41,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:02:41,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:02:41,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:02:41,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:02:41,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855415837] [2022-12-12 15:02:41,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855415837] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:02:41,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:02:41,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-12 15:02:41,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983931062] [2022-12-12 15:02:41,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:02:41,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 15:02:41,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:02:41,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 15:02:41,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-12 15:02:41,950 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:02:41,950 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 35 transitions, 257 flow. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 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 15:02:41,951 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:02:41,951 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:02:41,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:02:42,056 INFO L130 PetriNetUnfolder]: 152/291 cut-off events. [2022-12-12 15:02:42,056 INFO L131 PetriNetUnfolder]: For 754/754 co-relation queries the response was YES. [2022-12-12 15:02:42,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1210 conditions, 291 events. 152/291 cut-off events. For 754/754 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1064 event pairs, 45 based on Foata normal form. 4/295 useless extension candidates. Maximal degree in co-relation 1176. Up to 232 conditions per place. [2022-12-12 15:02:42,058 INFO L137 encePairwiseOnDemand]: 13/19 looper letters, 33 selfloop transitions, 10 changer transitions 7/50 dead transitions. [2022-12-12 15:02:42,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 50 transitions, 406 flow [2022-12-12 15:02:42,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 15:02:42,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 15:02:42,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 44 transitions. [2022-12-12 15:02:42,059 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4631578947368421 [2022-12-12 15:02:42,059 INFO L175 Difference]: Start difference. First operand has 48 places, 35 transitions, 257 flow. Second operand 5 states and 44 transitions. [2022-12-12 15:02:42,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 50 transitions, 406 flow [2022-12-12 15:02:42,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 50 transitions, 381 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-12 15:02:42,080 INFO L231 Difference]: Finished difference. Result has 47 places, 36 transitions, 262 flow [2022-12-12 15:02:42,080 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=262, PETRI_PLACES=47, PETRI_TRANSITIONS=36} [2022-12-12 15:02:42,080 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 26 predicate places. [2022-12-12 15:02:42,080 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 36 transitions, 262 flow [2022-12-12 15:02:42,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 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 15:02:42,081 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:02:42,081 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:02:42,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-12 15:02:42,081 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 15:02:42,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:02:42,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1566593713, now seen corresponding path program 2 times [2022-12-12 15:02:42,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:02:42,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425336953] [2022-12-12 15:02:42,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:02:42,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:02:42,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:02:42,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:02:42,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:02:42,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425336953] [2022-12-12 15:02:42,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425336953] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:02:42,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:02:42,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-12 15:02:42,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038221703] [2022-12-12 15:02:42,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:02:42,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 15:02:42,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:02:42,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 15:02:42,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-12 15:02:42,344 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:02:42,344 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 36 transitions, 262 flow. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 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 15:02:42,344 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:02:42,344 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:02:42,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:02:42,445 INFO L130 PetriNetUnfolder]: 158/301 cut-off events. [2022-12-12 15:02:42,446 INFO L131 PetriNetUnfolder]: For 728/728 co-relation queries the response was YES. [2022-12-12 15:02:42,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1243 conditions, 301 events. 158/301 cut-off events. For 728/728 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1093 event pairs, 40 based on Foata normal form. 4/305 useless extension candidates. Maximal degree in co-relation 1210. Up to 234 conditions per place. [2022-12-12 15:02:42,447 INFO L137 encePairwiseOnDemand]: 13/19 looper letters, 37 selfloop transitions, 10 changer transitions 1/48 dead transitions. [2022-12-12 15:02:42,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 48 transitions, 406 flow [2022-12-12 15:02:42,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 15:02:42,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 15:02:42,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 41 transitions. [2022-12-12 15:02:42,448 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.43157894736842106 [2022-12-12 15:02:42,448 INFO L175 Difference]: Start difference. First operand has 47 places, 36 transitions, 262 flow. Second operand 5 states and 41 transitions. [2022-12-12 15:02:42,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 48 transitions, 406 flow [2022-12-12 15:02:42,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 48 transitions, 393 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-12 15:02:42,451 INFO L231 Difference]: Finished difference. Result has 50 places, 37 transitions, 283 flow [2022-12-12 15:02:42,451 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=283, PETRI_PLACES=50, PETRI_TRANSITIONS=37} [2022-12-12 15:02:42,451 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 29 predicate places. [2022-12-12 15:02:42,451 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 37 transitions, 283 flow [2022-12-12 15:02:42,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 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 15:02:42,451 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:02:42,452 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:02:42,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-12 15:02:42,452 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 15:02:42,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:02:42,452 INFO L85 PathProgramCache]: Analyzing trace with hash 912131651, now seen corresponding path program 3 times [2022-12-12 15:02:42,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:02:42,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125900500] [2022-12-12 15:02:42,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:02:42,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:02:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:02:42,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:02:42,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:02:42,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125900500] [2022-12-12 15:02:42,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125900500] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:02:42,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150873559] [2022-12-12 15:02:42,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 15:02:42,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:02:42,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:02:42,685 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 15:02:42,701 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 15:02:42,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 15:02:42,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:02:42,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-12 15:02:42,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:02:42,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:02:42,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:02:42,934 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-12 15:02:42,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-12-12 15:02:42,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:02:42,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150873559] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:02:42,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:02:42,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2022-12-12 15:02:42,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693733325] [2022-12-12 15:02:42,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:02:42,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-12 15:02:42,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:02:42,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-12 15:02:42,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-12 15:02:42,962 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:02:42,962 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 37 transitions, 283 flow. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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 15:02:42,962 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:02:42,962 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:02:42,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:02:43,122 INFO L130 PetriNetUnfolder]: 164/311 cut-off events. [2022-12-12 15:02:43,123 INFO L131 PetriNetUnfolder]: For 949/949 co-relation queries the response was YES. [2022-12-12 15:02:43,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1331 conditions, 311 events. 164/311 cut-off events. For 949/949 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1151 event pairs, 46 based on Foata normal form. 4/315 useless extension candidates. Maximal degree in co-relation 1296. Up to 194 conditions per place. [2022-12-12 15:02:43,125 INFO L137 encePairwiseOnDemand]: 13/19 looper letters, 43 selfloop transitions, 11 changer transitions 1/55 dead transitions. [2022-12-12 15:02:43,125 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 55 transitions, 476 flow [2022-12-12 15:02:43,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 15:02:43,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 15:02:43,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 46 transitions. [2022-12-12 15:02:43,126 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.40350877192982454 [2022-12-12 15:02:43,126 INFO L175 Difference]: Start difference. First operand has 50 places, 37 transitions, 283 flow. Second operand 6 states and 46 transitions. [2022-12-12 15:02:43,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 55 transitions, 476 flow [2022-12-12 15:02:43,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 458 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-12 15:02:43,128 INFO L231 Difference]: Finished difference. Result has 53 places, 38 transitions, 301 flow [2022-12-12 15:02:43,129 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=301, PETRI_PLACES=53, PETRI_TRANSITIONS=38} [2022-12-12 15:02:43,129 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 32 predicate places. [2022-12-12 15:02:43,129 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 38 transitions, 301 flow [2022-12-12 15:02:43,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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 15:02:43,129 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:02:43,129 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:02:43,134 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 15:02:43,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-12 15:02:43,334 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 15:02:43,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:02:43,334 INFO L85 PathProgramCache]: Analyzing trace with hash 324663452, now seen corresponding path program 4 times [2022-12-12 15:02:43,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:02:43,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474801114] [2022-12-12 15:02:43,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:02:43,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:02:43,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:02:43,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:02:43,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:02:43,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474801114] [2022-12-12 15:02:43,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474801114] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:02:43,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344999976] [2022-12-12 15:02:43,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 15:02:43,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:02:43,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:02:43,893 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 15:02:43,894 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 15:02:43,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 15:02:43,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:02:43,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-12 15:02:43,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:02:44,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 15:02:44,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 15:02:44,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:02:44,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:02:44,252 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~B~0.offset (* c_~i_AB~0 4)))) (let ((.cse0 (forall ((v_ArrVal_316 (Array Int Int)) (~B~0.base Int)) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_316) ~B~0.base) .cse2)))))) (and (or .cse0 (< c_~i_BA~0 c_~An~0)) (forall ((v_ArrVal_316 (Array Int Int)) (~B~0.base Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_316))) (let ((.cse1 (select .cse3 ~B~0.base))) (or (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select .cse1 .cse2))) (let ((.cse4 (* c_~i_BA~0 4))) (= (select (select .cse3 c_~A~0.base) (+ c_~A~0.offset .cse4)) (select .cse1 (+ .cse4 c_~B~0.offset)))))))) (or .cse0 (< c_~i_BA~0 c_~Bn~0))))) is different from false [2022-12-12 15:02:44,415 INFO L321 Elim1Store]: treesize reduction 30, result has 84.9 percent of original size [2022-12-12 15:02:44,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 251 treesize of output 316 [2022-12-12 15:02:44,446 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:02:44,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 147 treesize of output 154 [2022-12-12 15:02:44,457 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 117 treesize of output 111 [2022-12-12 15:02:44,466 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 111 treesize of output 105 [2022-12-12 15:02:47,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:02:47,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344999976] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:02:47,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:02:47,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 18 [2022-12-12 15:02:47,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925708151] [2022-12-12 15:02:47,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:02:47,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 15:02:47,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:02:47,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 15:02:47,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=256, Unknown=1, NotChecked=32, Total=342 [2022-12-12 15:02:47,117 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:02:47,118 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 38 transitions, 301 flow. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 15:02:47,118 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:02:47,118 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:02:47,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:02:47,622 INFO L130 PetriNetUnfolder]: 193/374 cut-off events. [2022-12-12 15:02:47,622 INFO L131 PetriNetUnfolder]: For 1224/1224 co-relation queries the response was YES. [2022-12-12 15:02:47,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1621 conditions, 374 events. 193/374 cut-off events. For 1224/1224 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1549 event pairs, 20 based on Foata normal form. 12/386 useless extension candidates. Maximal degree in co-relation 1584. Up to 229 conditions per place. [2022-12-12 15:02:47,624 INFO L137 encePairwiseOnDemand]: 7/19 looper letters, 40 selfloop transitions, 21 changer transitions 3/64 dead transitions. [2022-12-12 15:02:47,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 64 transitions, 569 flow [2022-12-12 15:02:47,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-12 15:02:47,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-12 15:02:47,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 54 transitions. [2022-12-12 15:02:47,625 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3157894736842105 [2022-12-12 15:02:47,625 INFO L175 Difference]: Start difference. First operand has 53 places, 38 transitions, 301 flow. Second operand 9 states and 54 transitions. [2022-12-12 15:02:47,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 64 transitions, 569 flow [2022-12-12 15:02:47,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 64 transitions, 515 flow, removed 3 selfloop flow, removed 6 redundant places. [2022-12-12 15:02:47,629 INFO L231 Difference]: Finished difference. Result has 58 places, 45 transitions, 388 flow [2022-12-12 15:02:47,629 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=388, PETRI_PLACES=58, PETRI_TRANSITIONS=45} [2022-12-12 15:02:47,629 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 37 predicate places. [2022-12-12 15:02:47,629 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 45 transitions, 388 flow [2022-12-12 15:02:47,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 15:02:47,629 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:02:47,630 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:02:47,634 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 15:02:47,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:02:47,834 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 15:02:47,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:02:47,835 INFO L85 PathProgramCache]: Analyzing trace with hash -405756971, now seen corresponding path program 4 times [2022-12-12 15:02:47,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:02:47,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865335831] [2022-12-12 15:02:47,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:02:47,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:02:47,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:02:48,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:02:48,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:02:48,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865335831] [2022-12-12 15:02:48,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865335831] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:02:48,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:02:48,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-12 15:02:48,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293787928] [2022-12-12 15:02:48,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:02:48,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-12 15:02:48,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:02:48,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-12 15:02:48,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-12 15:02:48,252 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:02:48,252 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 45 transitions, 388 flow. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 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 15:02:48,252 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:02:48,252 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:02:48,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:02:48,411 INFO L130 PetriNetUnfolder]: 193/384 cut-off events. [2022-12-12 15:02:48,412 INFO L131 PetriNetUnfolder]: For 1461/1461 co-relation queries the response was YES. [2022-12-12 15:02:48,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1840 conditions, 384 events. 193/384 cut-off events. For 1461/1461 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1632 event pairs, 52 based on Foata normal form. 4/388 useless extension candidates. Maximal degree in co-relation 1801. Up to 312 conditions per place. [2022-12-12 15:02:48,414 INFO L137 encePairwiseOnDemand]: 12/19 looper letters, 37 selfloop transitions, 13 changer transitions 9/59 dead transitions. [2022-12-12 15:02:48,414 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 59 transitions, 565 flow [2022-12-12 15:02:48,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 15:02:48,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 15:02:48,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 43 transitions. [2022-12-12 15:02:48,415 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.37719298245614036 [2022-12-12 15:02:48,415 INFO L175 Difference]: Start difference. First operand has 58 places, 45 transitions, 388 flow. Second operand 6 states and 43 transitions. [2022-12-12 15:02:48,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 59 transitions, 565 flow [2022-12-12 15:02:48,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 59 transitions, 547 flow, removed 2 selfloop flow, removed 4 redundant places. [2022-12-12 15:02:48,418 INFO L231 Difference]: Finished difference. Result has 59 places, 44 transitions, 389 flow [2022-12-12 15:02:48,418 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=389, PETRI_PLACES=59, PETRI_TRANSITIONS=44} [2022-12-12 15:02:48,419 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 38 predicate places. [2022-12-12 15:02:48,419 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 44 transitions, 389 flow [2022-12-12 15:02:48,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 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 15:02:48,419 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:02:48,419 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:02:48,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-12 15:02:48,419 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 15:02:48,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:02:48,419 INFO L85 PathProgramCache]: Analyzing trace with hash -118324344, now seen corresponding path program 5 times [2022-12-12 15:02:48,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:02:48,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242909110] [2022-12-12 15:02:48,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:02:48,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:02:48,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:02:48,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:02:48,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:02:48,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242909110] [2022-12-12 15:02:48,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242909110] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:02:48,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718389812] [2022-12-12 15:02:48,925 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 15:02:48,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:02:48,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:02:48,927 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 15:02:48,929 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 15:02:48,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 15:02:48,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:02:48,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-12 15:02:48,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:02:49,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 15:02:49,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 15:02:49,147 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-12 15:02:49,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 23 [2022-12-12 15:02:49,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:02:49,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:02:49,405 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:02:49,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 167 treesize of output 288 [2022-12-12 15:02:49,435 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:02:49,436 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 87 treesize of output 72 [2022-12-12 15:02:53,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:02:53,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718389812] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:02:53,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:02:53,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2022-12-12 15:02:53,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886277823] [2022-12-12 15:02:53,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:02:53,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-12 15:02:53,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:02:53,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-12 15:02:53,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=395, Unknown=4, NotChecked=0, Total=462 [2022-12-12 15:02:53,060 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:02:53,060 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 44 transitions, 389 flow. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 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 15:02:53,060 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:02:53,060 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:02:53,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:02:53,562 INFO L130 PetriNetUnfolder]: 170/335 cut-off events. [2022-12-12 15:02:53,563 INFO L131 PetriNetUnfolder]: For 1379/1379 co-relation queries the response was YES. [2022-12-12 15:02:53,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1620 conditions, 335 events. 170/335 cut-off events. For 1379/1379 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1369 event pairs, 21 based on Foata normal form. 12/347 useless extension candidates. Maximal degree in co-relation 1582. Up to 169 conditions per place. [2022-12-12 15:02:53,565 INFO L137 encePairwiseOnDemand]: 9/19 looper letters, 41 selfloop transitions, 18 changer transitions 2/61 dead transitions. [2022-12-12 15:02:53,565 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 61 transitions, 587 flow [2022-12-12 15:02:53,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-12 15:02:53,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-12 15:02:53,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 48 transitions. [2022-12-12 15:02:53,566 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2807017543859649 [2022-12-12 15:02:53,566 INFO L175 Difference]: Start difference. First operand has 59 places, 44 transitions, 389 flow. Second operand 9 states and 48 transitions. [2022-12-12 15:02:53,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 61 transitions, 587 flow [2022-12-12 15:02:53,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 61 transitions, 565 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-12 15:02:53,569 INFO L231 Difference]: Finished difference. Result has 64 places, 44 transitions, 412 flow [2022-12-12 15:02:53,569 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=412, PETRI_PLACES=64, PETRI_TRANSITIONS=44} [2022-12-12 15:02:53,569 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 43 predicate places. [2022-12-12 15:02:53,569 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 44 transitions, 412 flow [2022-12-12 15:02:53,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 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 15:02:53,570 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:02:53,570 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:02:53,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-12 15:02:53,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:02:53,770 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 15:02:53,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:02:53,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1207809763, now seen corresponding path program 5 times [2022-12-12 15:02:53,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:02:53,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728225307] [2022-12-12 15:02:53,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:02:53,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:02:53,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:02:54,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:02:54,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:02:54,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728225307] [2022-12-12 15:02:54,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728225307] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:02:54,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:02:54,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-12 15:02:54,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515527135] [2022-12-12 15:02:54,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:02:54,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-12 15:02:54,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:02:54,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-12 15:02:54,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-12-12 15:02:54,125 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:02:54,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 44 transitions, 412 flow. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 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 15:02:54,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:02:54,125 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:02:54,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:02:54,262 INFO L130 PetriNetUnfolder]: 166/331 cut-off events. [2022-12-12 15:02:54,262 INFO L131 PetriNetUnfolder]: For 1744/1744 co-relation queries the response was YES. [2022-12-12 15:02:54,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1693 conditions, 331 events. 166/331 cut-off events. For 1744/1744 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1340 event pairs, 42 based on Foata normal form. 4/335 useless extension candidates. Maximal degree in co-relation 1652. Up to 276 conditions per place. [2022-12-12 15:02:54,264 INFO L137 encePairwiseOnDemand]: 14/19 looper letters, 36 selfloop transitions, 10 changer transitions 9/55 dead transitions. [2022-12-12 15:02:54,264 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 55 transitions, 573 flow [2022-12-12 15:02:54,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 15:02:54,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 15:02:54,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 40 transitions. [2022-12-12 15:02:54,265 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.42105263157894735 [2022-12-12 15:02:54,265 INFO L175 Difference]: Start difference. First operand has 64 places, 44 transitions, 412 flow. Second operand 5 states and 40 transitions. [2022-12-12 15:02:54,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 55 transitions, 573 flow [2022-12-12 15:02:54,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 55 transitions, 532 flow, removed 1 selfloop flow, removed 8 redundant places. [2022-12-12 15:02:54,268 INFO L231 Difference]: Finished difference. Result has 60 places, 42 transitions, 373 flow [2022-12-12 15:02:54,268 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=373, PETRI_PLACES=60, PETRI_TRANSITIONS=42} [2022-12-12 15:02:54,268 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 39 predicate places. [2022-12-12 15:02:54,268 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 42 transitions, 373 flow [2022-12-12 15:02:54,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 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 15:02:54,269 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:02:54,269 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:02:54,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-12 15:02:54,269 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 15:02:54,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:02:54,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1449091514, now seen corresponding path program 6 times [2022-12-12 15:02:54,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:02:54,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247971639] [2022-12-12 15:02:54,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:02:54,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:02:54,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:02:54,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:02:54,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:02:54,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247971639] [2022-12-12 15:02:54,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247971639] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:02:54,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429894030] [2022-12-12 15:02:54,715 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 15:02:54,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:02:54,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:02:54,716 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 15:02:54,718 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 15:02:54,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 15:02:54,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:02:54,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-12 15:02:54,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:02:54,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 15:02:54,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 15:02:55,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:02:55,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:02:55,136 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~B~0.offset (* c_~i_AB~0 4)))) (let ((.cse0 (forall ((~B~0.base Int) (v_ArrVal_432 (Array Int Int))) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_432) ~B~0.base) .cse2)))))) (and (or (< c_~i_BA~0 c_~Bn~0) .cse0) (forall ((~B~0.base Int) (v_ArrVal_432 (Array Int Int))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_432))) (let ((.cse1 (select .cse4 ~B~0.base))) (or (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select .cse1 .cse2))) (let ((.cse3 (* c_~i_BA~0 4))) (= (select .cse1 (+ .cse3 c_~B~0.offset)) (select (select .cse4 c_~A~0.base) (+ c_~A~0.offset .cse3)))))))) (or (< c_~i_BA~0 c_~An~0) .cse0)))) is different from false [2022-12-12 15:02:55,183 INFO L321 Elim1Store]: treesize reduction 15, result has 82.4 percent of original size [2022-12-12 15:02:55,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 146 treesize of output 159 [2022-12-12 15:02:55,197 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:02:55,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 96 [2022-12-12 15:02:55,371 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 15:02:55,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 24 [2022-12-12 15:02:55,377 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 15:02:55,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 24 [2022-12-12 15:02:55,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:02:55,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429894030] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 15:02:55,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 15:02:55,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 9] total 23 [2022-12-12 15:02:55,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504885343] [2022-12-12 15:02:55,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:02:55,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-12 15:02:55,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:02:55,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-12 15:02:55,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=432, Unknown=1, NotChecked=42, Total=552 [2022-12-12 15:02:55,510 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:02:55,510 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 42 transitions, 373 flow. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 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 15:02:55,510 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:02:55,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:02:55,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:02:55,975 INFO L130 PetriNetUnfolder]: 152/280 cut-off events. [2022-12-12 15:02:55,976 INFO L131 PetriNetUnfolder]: For 1287/1287 co-relation queries the response was YES. [2022-12-12 15:02:55,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1436 conditions, 280 events. 152/280 cut-off events. For 1287/1287 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 965 event pairs, 36 based on Foata normal form. 2/282 useless extension candidates. Maximal degree in co-relation 1398. Up to 254 conditions per place. [2022-12-12 15:02:55,978 INFO L137 encePairwiseOnDemand]: 7/19 looper letters, 28 selfloop transitions, 16 changer transitions 3/47 dead transitions. [2022-12-12 15:02:55,978 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 47 transitions, 480 flow [2022-12-12 15:02:55,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-12 15:02:55,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-12 15:02:55,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 39 transitions. [2022-12-12 15:02:55,978 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.20526315789473684 [2022-12-12 15:02:55,978 INFO L175 Difference]: Start difference. First operand has 60 places, 42 transitions, 373 flow. Second operand 10 states and 39 transitions. [2022-12-12 15:02:55,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 47 transitions, 480 flow [2022-12-12 15:02:55,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 47 transitions, 449 flow, removed 2 selfloop flow, removed 6 redundant places. [2022-12-12 15:02:55,981 INFO L231 Difference]: Finished difference. Result has 61 places, 40 transitions, 349 flow [2022-12-12 15:02:55,981 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=349, PETRI_PLACES=61, PETRI_TRANSITIONS=40} [2022-12-12 15:02:55,981 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 40 predicate places. [2022-12-12 15:02:55,982 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 40 transitions, 349 flow [2022-12-12 15:02:55,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 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 15:02:55,982 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:02:55,982 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:02:56,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-12 15:02:56,186 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 15:02:56,186 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 15:02:56,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:02:56,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1960092935, now seen corresponding path program 6 times [2022-12-12 15:02:56,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:02:56,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313027523] [2022-12-12 15:02:56,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:02:56,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:02:56,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:02:56,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:02:56,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:02:56,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313027523] [2022-12-12 15:02:56,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313027523] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:02:56,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:02:56,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-12 15:02:56,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618708098] [2022-12-12 15:02:56,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:02:56,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 15:02:56,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:02:56,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 15:02:56,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-12 15:02:56,533 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:02:56,533 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 40 transitions, 349 flow. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 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 15:02:56,533 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:02:56,533 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:02:56,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:02:56,660 INFO L130 PetriNetUnfolder]: 140/254 cut-off events. [2022-12-12 15:02:56,661 INFO L131 PetriNetUnfolder]: For 1046/1046 co-relation queries the response was YES. [2022-12-12 15:02:56,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1323 conditions, 254 events. 140/254 cut-off events. For 1046/1046 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 823 event pairs, 31 based on Foata normal form. 4/258 useless extension candidates. Maximal degree in co-relation 1286. Up to 216 conditions per place. [2022-12-12 15:02:56,663 INFO L137 encePairwiseOnDemand]: 13/19 looper letters, 35 selfloop transitions, 12 changer transitions 0/47 dead transitions. [2022-12-12 15:02:56,663 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 47 transitions, 483 flow [2022-12-12 15:02:56,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 15:02:56,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 15:02:56,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 34 transitions. [2022-12-12 15:02:56,665 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2982456140350877 [2022-12-12 15:02:56,665 INFO L175 Difference]: Start difference. First operand has 61 places, 40 transitions, 349 flow. Second operand 6 states and 34 transitions. [2022-12-12 15:02:56,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 47 transitions, 483 flow [2022-12-12 15:02:56,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 47 transitions, 441 flow, removed 1 selfloop flow, removed 10 redundant places. [2022-12-12 15:02:56,667 INFO L231 Difference]: Finished difference. Result has 55 places, 40 transitions, 338 flow [2022-12-12 15:02:56,667 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=338, PETRI_PLACES=55, PETRI_TRANSITIONS=40} [2022-12-12 15:02:56,668 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 34 predicate places. [2022-12-12 15:02:56,668 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 40 transitions, 338 flow [2022-12-12 15:02:56,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 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 15:02:56,668 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:02:56,668 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:02:56,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-12 15:02:56,669 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 15:02:56,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:02:56,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1195676588, now seen corresponding path program 1 times [2022-12-12 15:02:56,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:02:56,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921631276] [2022-12-12 15:02:56,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:02:56,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:02:56,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:02:56,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:02:56,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:02:56,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921631276] [2022-12-12 15:02:56,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921631276] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:02:56,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885404369] [2022-12-12 15:02:56,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:02:56,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:02:56,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:02:56,762 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 15:02:56,764 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 15:02:56,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:02:56,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-12 15:02:56,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:02:56,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:02:56,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:02:56,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:02:56,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885404369] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:02:56,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:02:56,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 5 [2022-12-12 15:02:56,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127805643] [2022-12-12 15:02:56,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:02:56,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 15:02:56,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:02:56,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 15:02:56,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-12 15:02:56,921 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:02:56,921 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 40 transitions, 338 flow. Second operand has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:02:56,921 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:02:56,921 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:02:56,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:02:57,029 INFO L130 PetriNetUnfolder]: 300/546 cut-off events. [2022-12-12 15:02:57,029 INFO L131 PetriNetUnfolder]: For 2224/2224 co-relation queries the response was YES. [2022-12-12 15:02:57,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2686 conditions, 546 events. 300/546 cut-off events. For 2224/2224 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2246 event pairs, 26 based on Foata normal form. 4/550 useless extension candidates. Maximal degree in co-relation 2650. Up to 263 conditions per place. [2022-12-12 15:02:57,032 INFO L137 encePairwiseOnDemand]: 15/19 looper letters, 65 selfloop transitions, 18 changer transitions 2/85 dead transitions. [2022-12-12 15:02:57,032 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 85 transitions, 782 flow [2022-12-12 15:02:57,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 15:02:57,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 15:02:57,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 68 transitions. [2022-12-12 15:02:57,033 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5112781954887218 [2022-12-12 15:02:57,033 INFO L175 Difference]: Start difference. First operand has 55 places, 40 transitions, 338 flow. Second operand 7 states and 68 transitions. [2022-12-12 15:02:57,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 85 transitions, 782 flow [2022-12-12 15:02:57,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 85 transitions, 753 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-12-12 15:02:57,037 INFO L231 Difference]: Finished difference. Result has 60 places, 50 transitions, 469 flow [2022-12-12 15:02:57,037 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=469, PETRI_PLACES=60, PETRI_TRANSITIONS=50} [2022-12-12 15:02:57,037 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 39 predicate places. [2022-12-12 15:02:57,037 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 50 transitions, 469 flow [2022-12-12 15:02:57,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:02:57,037 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:02:57,037 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:02:57,044 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 15:02:57,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-12 15:02:57,242 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 15:02:57,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:02:57,243 INFO L85 PathProgramCache]: Analyzing trace with hash -2007088620, now seen corresponding path program 2 times [2022-12-12 15:02:57,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:02:57,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171067099] [2022-12-12 15:02:57,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:02:57,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:02:57,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:02:57,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:02:57,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:02:57,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171067099] [2022-12-12 15:02:57,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171067099] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:02:57,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284117096] [2022-12-12 15:02:57,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 15:02:57,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:02:57,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:02:57,328 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 15:02:57,332 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 15:02:57,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 15:02:57,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:02:57,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-12 15:02:57,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:02:57,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:02:57,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:02:57,476 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 15:02:57,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284117096] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:02:57,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:02:57,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 5 [2022-12-12 15:02:57,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320014238] [2022-12-12 15:02:57,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:02:57,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 15:02:57,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:02:57,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 15:02:57,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-12 15:02:57,479 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:02:57,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 50 transitions, 469 flow. Second operand has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:02:57,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:02:57,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:02:57,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:02:57,600 INFO L130 PetriNetUnfolder]: 420/762 cut-off events. [2022-12-12 15:02:57,600 INFO L131 PetriNetUnfolder]: For 3731/3731 co-relation queries the response was YES. [2022-12-12 15:02:57,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3900 conditions, 762 events. 420/762 cut-off events. For 3731/3731 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3462 event pairs, 95 based on Foata normal form. 4/766 useless extension candidates. Maximal degree in co-relation 3862. Up to 546 conditions per place. [2022-12-12 15:02:57,605 INFO L137 encePairwiseOnDemand]: 15/19 looper letters, 70 selfloop transitions, 18 changer transitions 2/90 dead transitions. [2022-12-12 15:02:57,605 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 90 transitions, 905 flow [2022-12-12 15:02:57,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 15:02:57,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 15:02:57,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 63 transitions. [2022-12-12 15:02:57,606 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.47368421052631576 [2022-12-12 15:02:57,606 INFO L175 Difference]: Start difference. First operand has 60 places, 50 transitions, 469 flow. Second operand 7 states and 63 transitions. [2022-12-12 15:02:57,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 90 transitions, 905 flow [2022-12-12 15:02:57,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 90 transitions, 871 flow, removed 13 selfloop flow, removed 1 redundant places. [2022-12-12 15:02:57,610 INFO L231 Difference]: Finished difference. Result has 68 places, 60 transitions, 595 flow [2022-12-12 15:02:57,610 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=595, PETRI_PLACES=68, PETRI_TRANSITIONS=60} [2022-12-12 15:02:57,611 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 47 predicate places. [2022-12-12 15:02:57,611 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 60 transitions, 595 flow [2022-12-12 15:02:57,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:02:57,611 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:02:57,611 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:02:57,625 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 15:02:57,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-12 15:02:57,816 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 15:02:57,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:02:57,816 INFO L85 PathProgramCache]: Analyzing trace with hash 871526116, now seen corresponding path program 3 times [2022-12-12 15:02:57,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:02:57,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336721120] [2022-12-12 15:02:57,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:02:57,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:02:57,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:02:57,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:02:57,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:02:57,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336721120] [2022-12-12 15:02:57,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336721120] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:02:57,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254374698] [2022-12-12 15:02:57,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 15:02:57,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:02:57,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:02:57,917 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 15:02:57,945 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 15:02:57,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 15:02:57,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:02:57,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 15:02:57,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:02:58,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:02:58,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:02:58,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:02:58,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254374698] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:02:58,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:02:58,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2022-12-12 15:02:58,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105603455] [2022-12-12 15:02:58,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:02:58,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-12 15:02:58,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:02:58,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-12 15:02:58,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-12-12 15:02:58,103 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:02:58,104 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 60 transitions, 595 flow. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:02:58,104 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:02:58,104 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:02:58,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:02:58,481 INFO L130 PetriNetUnfolder]: 1147/2220 cut-off events. [2022-12-12 15:02:58,481 INFO L131 PetriNetUnfolder]: For 12314/12314 co-relation queries the response was YES. [2022-12-12 15:02:58,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11504 conditions, 2220 events. 1147/2220 cut-off events. For 12314/12314 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 13897 event pairs, 484 based on Foata normal form. 168/2388 useless extension candidates. Maximal degree in co-relation 11073. Up to 760 conditions per place. [2022-12-12 15:02:58,495 INFO L137 encePairwiseOnDemand]: 13/19 looper letters, 166 selfloop transitions, 41 changer transitions 0/207 dead transitions. [2022-12-12 15:02:58,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 207 transitions, 2389 flow [2022-12-12 15:02:58,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-12 15:02:58,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-12 15:02:58,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 96 transitions. [2022-12-12 15:02:58,497 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3368421052631579 [2022-12-12 15:02:58,497 INFO L175 Difference]: Start difference. First operand has 68 places, 60 transitions, 595 flow. Second operand 15 states and 96 transitions. [2022-12-12 15:02:58,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 207 transitions, 2389 flow [2022-12-12 15:02:58,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 207 transitions, 2288 flow, removed 36 selfloop flow, removed 1 redundant places. [2022-12-12 15:02:58,520 INFO L231 Difference]: Finished difference. Result has 87 places, 97 transitions, 1213 flow [2022-12-12 15:02:58,520 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=545, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1213, PETRI_PLACES=87, PETRI_TRANSITIONS=97} [2022-12-12 15:02:58,520 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 66 predicate places. [2022-12-12 15:02:58,521 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 97 transitions, 1213 flow [2022-12-12 15:02:58,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:02:58,521 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:02:58,521 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:02:58,527 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 15:02:58,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:02:58,726 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 15:02:58,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:02:58,726 INFO L85 PathProgramCache]: Analyzing trace with hash -934515869, now seen corresponding path program 4 times [2022-12-12 15:02:58,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:02:58,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024436143] [2022-12-12 15:02:58,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:02:58,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:02:58,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:02:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:02:58,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:02:58,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024436143] [2022-12-12 15:02:58,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024436143] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:02:58,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164317515] [2022-12-12 15:02:58,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 15:02:58,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:02:58,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:02:58,796 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 15:02:58,836 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 15:02:58,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 15:02:58,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:02:58,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 15:02:58,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:02:58,950 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:02:58,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:02:58,993 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:02:58,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164317515] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:02:58,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:02:58,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2022-12-12 15:02:58,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176105054] [2022-12-12 15:02:58,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:02:58,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-12 15:02:58,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:02:58,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-12 15:02:58,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-12-12 15:02:58,994 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:02:58,995 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 97 transitions, 1213 flow. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:02:58,995 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:02:58,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:02:58,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:02:59,283 INFO L130 PetriNetUnfolder]: 625/1218 cut-off events. [2022-12-12 15:02:59,284 INFO L131 PetriNetUnfolder]: For 7814/7814 co-relation queries the response was YES. [2022-12-12 15:02:59,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6696 conditions, 1218 events. 625/1218 cut-off events. For 7814/7814 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 6425 event pairs, 310 based on Foata normal form. 54/1272 useless extension candidates. Maximal degree in co-relation 6362. Up to 760 conditions per place. [2022-12-12 15:02:59,291 INFO L137 encePairwiseOnDemand]: 12/19 looper letters, 56 selfloop transitions, 6 changer transitions 100/162 dead transitions. [2022-12-12 15:02:59,291 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 162 transitions, 1976 flow [2022-12-12 15:02:59,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-12 15:02:59,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-12 15:02:59,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 84 transitions. [2022-12-12 15:02:59,292 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.29473684210526313 [2022-12-12 15:02:59,292 INFO L175 Difference]: Start difference. First operand has 87 places, 97 transitions, 1213 flow. Second operand 15 states and 84 transitions. [2022-12-12 15:02:59,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 162 transitions, 1976 flow [2022-12-12 15:02:59,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 162 transitions, 1927 flow, removed 21 selfloop flow, removed 3 redundant places. [2022-12-12 15:02:59,307 INFO L231 Difference]: Finished difference. Result has 104 places, 62 transitions, 664 flow [2022-12-12 15:02:59,307 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1002, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=664, PETRI_PLACES=104, PETRI_TRANSITIONS=62} [2022-12-12 15:02:59,307 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 83 predicate places. [2022-12-12 15:02:59,307 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 62 transitions, 664 flow [2022-12-12 15:02:59,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:02:59,308 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:02:59,309 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:02:59,315 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 15:02:59,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:02:59,513 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 15:02:59,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:02:59,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1289402429, now seen corresponding path program 5 times [2022-12-12 15:02:59,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:02:59,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32446801] [2022-12-12 15:02:59,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:02:59,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:02:59,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:02:59,636 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 15:02:59,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:02:59,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32446801] [2022-12-12 15:02:59,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32446801] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:02:59,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916385000] [2022-12-12 15:02:59,636 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 15:02:59,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:02:59,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:02:59,648 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 15:02:59,683 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 15:02:59,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 15:02:59,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:02:59,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-12 15:02:59,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:02:59,841 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:02:59,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:02:59,902 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:02:59,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916385000] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:02:59,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:02:59,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 16 [2022-12-12 15:02:59,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353532390] [2022-12-12 15:02:59,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:02:59,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-12 15:02:59,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:02:59,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-12 15:02:59,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-12-12 15:02:59,903 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:02:59,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 62 transitions, 664 flow. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 15:02:59,903 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:02:59,903 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:02:59,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:03:00,328 INFO L130 PetriNetUnfolder]: 505/929 cut-off events. [2022-12-12 15:03:00,329 INFO L131 PetriNetUnfolder]: For 6233/6233 co-relation queries the response was YES. [2022-12-12 15:03:00,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5239 conditions, 929 events. 505/929 cut-off events. For 6233/6233 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4424 event pairs, 36 based on Foata normal form. 46/975 useless extension candidates. Maximal degree in co-relation 5182. Up to 271 conditions per place. [2022-12-12 15:03:00,335 INFO L137 encePairwiseOnDemand]: 11/19 looper letters, 100 selfloop transitions, 49 changer transitions 1/150 dead transitions. [2022-12-12 15:03:00,336 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 150 transitions, 1676 flow [2022-12-12 15:03:00,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-12 15:03:00,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-12 15:03:00,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 107 transitions. [2022-12-12 15:03:00,337 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.33126934984520123 [2022-12-12 15:03:00,337 INFO L175 Difference]: Start difference. First operand has 104 places, 62 transitions, 664 flow. Second operand 17 states and 107 transitions. [2022-12-12 15:03:00,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 150 transitions, 1676 flow [2022-12-12 15:03:00,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 150 transitions, 1484 flow, removed 90 selfloop flow, removed 16 redundant places. [2022-12-12 15:03:00,347 INFO L231 Difference]: Finished difference. Result has 95 places, 82 transitions, 913 flow [2022-12-12 15:03:00,347 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=913, PETRI_PLACES=95, PETRI_TRANSITIONS=82} [2022-12-12 15:03:00,348 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 74 predicate places. [2022-12-12 15:03:00,348 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 82 transitions, 913 flow [2022-12-12 15:03:00,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 15:03:00,348 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:03:00,348 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:03:00,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-12 15:03:00,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-12 15:03:00,552 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 15:03:00,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:03:00,553 INFO L85 PathProgramCache]: Analyzing trace with hash -2007364188, now seen corresponding path program 6 times [2022-12-12 15:03:00,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:03:00,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714694635] [2022-12-12 15:03:00,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:03:00,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:03:00,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:03:01,044 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:03:01,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:03:01,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714694635] [2022-12-12 15:03:01,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714694635] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:03:01,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199448688] [2022-12-12 15:03:01,044 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 15:03:01,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:03:01,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:03:01,046 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 15:03:01,047 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 15:03:01,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-12 15:03:01,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:03:01,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-12 15:03:01,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:03:01,324 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:03:01,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:03:01,589 INFO L321 Elim1Store]: treesize reduction 19, result has 91.6 percent of original size [2022-12-12 15:03:01,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 95 treesize of output 236 [2022-12-12 15:03:06,133 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:03:06,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199448688] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:03:06,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:03:06,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 6] total 24 [2022-12-12 15:03:06,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356328450] [2022-12-12 15:03:06,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:03:06,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-12 15:03:06,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:03:06,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-12 15:03:06,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-12-12 15:03:06,134 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:03:06,134 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 82 transitions, 913 flow. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 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 15:03:06,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:03:06,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:03:06,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:03:06,663 INFO L130 PetriNetUnfolder]: 592/1087 cut-off events. [2022-12-12 15:03:06,663 INFO L131 PetriNetUnfolder]: For 8487/8487 co-relation queries the response was YES. [2022-12-12 15:03:06,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6509 conditions, 1087 events. 592/1087 cut-off events. For 8487/8487 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5408 event pairs, 108 based on Foata normal form. 24/1111 useless extension candidates. Maximal degree in co-relation 6455. Up to 631 conditions per place. [2022-12-12 15:03:06,671 INFO L137 encePairwiseOnDemand]: 8/19 looper letters, 111 selfloop transitions, 43 changer transitions 2/156 dead transitions. [2022-12-12 15:03:06,671 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 156 transitions, 1818 flow [2022-12-12 15:03:06,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-12 15:03:06,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-12 15:03:06,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 106 transitions. [2022-12-12 15:03:06,688 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.30994152046783624 [2022-12-12 15:03:06,688 INFO L175 Difference]: Start difference. First operand has 95 places, 82 transitions, 913 flow. Second operand 18 states and 106 transitions. [2022-12-12 15:03:06,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 156 transitions, 1818 flow [2022-12-12 15:03:06,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 156 transitions, 1713 flow, removed 36 selfloop flow, removed 8 redundant places. [2022-12-12 15:03:06,719 INFO L231 Difference]: Finished difference. Result has 111 places, 97 transitions, 1184 flow [2022-12-12 15:03:06,719 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1184, PETRI_PLACES=111, PETRI_TRANSITIONS=97} [2022-12-12 15:03:06,720 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 90 predicate places. [2022-12-12 15:03:06,720 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 97 transitions, 1184 flow [2022-12-12 15:03:06,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 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 15:03:06,720 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:03:06,720 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:03:06,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-12 15:03:06,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:03:06,921 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 15:03:06,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:03:06,921 INFO L85 PathProgramCache]: Analyzing trace with hash 798196639, now seen corresponding path program 1 times [2022-12-12 15:03:06,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:03:06,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085188572] [2022-12-12 15:03:06,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:03:06,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:03:06,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:03:07,275 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:03:07,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:03:07,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085188572] [2022-12-12 15:03:07,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085188572] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:03:07,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165583109] [2022-12-12 15:03:07,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:03:07,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:03:07,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:03:07,277 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 15:03:07,279 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 15:03:07,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:03:07,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-12 15:03:07,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:03:07,484 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:03:07,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:03:07,576 INFO L321 Elim1Store]: treesize reduction 34, result has 62.6 percent of original size [2022-12-12 15:03:07,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 64 [2022-12-12 15:03:07,613 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:03:07,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165583109] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:03:07,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:03:07,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 18 [2022-12-12 15:03:07,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619940106] [2022-12-12 15:03:07,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:03:07,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 15:03:07,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:03:07,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 15:03:07,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-12-12 15:03:07,616 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:03:07,616 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 97 transitions, 1184 flow. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 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 15:03:07,616 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:03:07,616 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:03:07,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:03:08,058 INFO L130 PetriNetUnfolder]: 599/1117 cut-off events. [2022-12-12 15:03:08,058 INFO L131 PetriNetUnfolder]: For 12606/12606 co-relation queries the response was YES. [2022-12-12 15:03:08,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7353 conditions, 1117 events. 599/1117 cut-off events. For 12606/12606 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5670 event pairs, 146 based on Foata normal form. 8/1125 useless extension candidates. Maximal degree in co-relation 7293. Up to 849 conditions per place. [2022-12-12 15:03:08,071 INFO L137 encePairwiseOnDemand]: 13/19 looper letters, 98 selfloop transitions, 30 changer transitions 20/148 dead transitions. [2022-12-12 15:03:08,071 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 148 transitions, 1828 flow [2022-12-12 15:03:08,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-12 15:03:08,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-12 15:03:08,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 89 transitions. [2022-12-12 15:03:08,072 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.39035087719298245 [2022-12-12 15:03:08,072 INFO L175 Difference]: Start difference. First operand has 111 places, 97 transitions, 1184 flow. Second operand 12 states and 89 transitions. [2022-12-12 15:03:08,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 148 transitions, 1828 flow [2022-12-12 15:03:08,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 148 transitions, 1675 flow, removed 48 selfloop flow, removed 10 redundant places. [2022-12-12 15:03:08,095 INFO L231 Difference]: Finished difference. Result has 113 places, 97 transitions, 1108 flow [2022-12-12 15:03:08,095 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1043, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1108, PETRI_PLACES=113, PETRI_TRANSITIONS=97} [2022-12-12 15:03:08,095 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 92 predicate places. [2022-12-12 15:03:08,095 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 97 transitions, 1108 flow [2022-12-12 15:03:08,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 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 15:03:08,095 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:03:08,095 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:03:08,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-12 15:03:08,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:03:08,300 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 15:03:08,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:03:08,300 INFO L85 PathProgramCache]: Analyzing trace with hash 701230749, now seen corresponding path program 2 times [2022-12-12 15:03:08,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:03:08,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222600461] [2022-12-12 15:03:08,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:03:08,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:03:08,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:03:08,587 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:03:08,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:03:08,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222600461] [2022-12-12 15:03:08,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222600461] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:03:08,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18627945] [2022-12-12 15:03:08,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 15:03:08,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:03:08,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:03:08,589 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 15:03:08,615 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 15:03:08,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 15:03:08,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:03:08,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-12 15:03:08,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:03:08,820 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:03:08,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:03:08,910 INFO L321 Elim1Store]: treesize reduction 34, result has 62.6 percent of original size [2022-12-12 15:03:08,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 64 [2022-12-12 15:03:08,949 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:03:08,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18627945] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:03:08,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:03:08,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 19 [2022-12-12 15:03:08,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779921507] [2022-12-12 15:03:08,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:03:08,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 15:03:08,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:03:08,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 15:03:08,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-12-12 15:03:08,952 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:03:08,952 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 97 transitions, 1108 flow. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 15:03:08,952 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:03:08,952 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:03:08,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:03:09,491 INFO L130 PetriNetUnfolder]: 617/1137 cut-off events. [2022-12-12 15:03:09,491 INFO L131 PetriNetUnfolder]: For 11123/11123 co-relation queries the response was YES. [2022-12-12 15:03:09,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7139 conditions, 1137 events. 617/1137 cut-off events. For 11123/11123 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5729 event pairs, 136 based on Foata normal form. 12/1149 useless extension candidates. Maximal degree in co-relation 7079. Up to 843 conditions per place. [2022-12-12 15:03:09,498 INFO L137 encePairwiseOnDemand]: 13/19 looper letters, 102 selfloop transitions, 45 changer transitions 2/149 dead transitions. [2022-12-12 15:03:09,498 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 149 transitions, 1883 flow [2022-12-12 15:03:09,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-12 15:03:09,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-12 15:03:09,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 93 transitions. [2022-12-12 15:03:09,499 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.34962406015037595 [2022-12-12 15:03:09,499 INFO L175 Difference]: Start difference. First operand has 113 places, 97 transitions, 1108 flow. Second operand 14 states and 93 transitions. [2022-12-12 15:03:09,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 149 transitions, 1883 flow [2022-12-12 15:03:09,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 149 transitions, 1821 flow, removed 2 selfloop flow, removed 6 redundant places. [2022-12-12 15:03:09,519 INFO L231 Difference]: Finished difference. Result has 123 places, 109 transitions, 1330 flow [2022-12-12 15:03:09,519 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1056, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1330, PETRI_PLACES=123, PETRI_TRANSITIONS=109} [2022-12-12 15:03:09,519 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 102 predicate places. [2022-12-12 15:03:09,519 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 109 transitions, 1330 flow [2022-12-12 15:03:09,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 15:03:09,519 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:03:09,520 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:03:09,543 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 15:03:09,730 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,SelfDestructingSolverStorable23 [2022-12-12 15:03:09,730 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 15:03:09,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:03:09,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1446309529, now seen corresponding path program 3 times [2022-12-12 15:03:09,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:03:09,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76131944] [2022-12-12 15:03:09,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:03:09,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:03:09,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:03:10,037 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:03:10,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:03:10,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76131944] [2022-12-12 15:03:10,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76131944] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:03:10,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566999356] [2022-12-12 15:03:10,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 15:03:10,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:03:10,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:03:10,053 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 15:03:10,054 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 15:03:10,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 15:03:10,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:03:10,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-12 15:03:10,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:03:10,273 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:03:10,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:03:10,404 INFO L321 Elim1Store]: treesize reduction 34, result has 62.6 percent of original size [2022-12-12 15:03:10,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 64 [2022-12-12 15:03:10,448 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:03:10,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566999356] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:03:10,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:03:10,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 18 [2022-12-12 15:03:10,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015229417] [2022-12-12 15:03:10,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:03:10,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 15:03:10,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:03:10,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 15:03:10,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-12-12 15:03:10,449 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:03:10,449 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 109 transitions, 1330 flow. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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 15:03:10,449 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:03:10,449 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:03:10,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:03:10,928 INFO L130 PetriNetUnfolder]: 617/1155 cut-off events. [2022-12-12 15:03:10,928 INFO L131 PetriNetUnfolder]: For 13517/13517 co-relation queries the response was YES. [2022-12-12 15:03:10,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7627 conditions, 1155 events. 617/1155 cut-off events. For 13517/13517 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5965 event pairs, 142 based on Foata normal form. 12/1167 useless extension candidates. Maximal degree in co-relation 7562. Up to 879 conditions per place. [2022-12-12 15:03:10,947 INFO L137 encePairwiseOnDemand]: 13/19 looper letters, 97 selfloop transitions, 37 changer transitions 14/148 dead transitions. [2022-12-12 15:03:10,948 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 148 transitions, 1873 flow [2022-12-12 15:03:10,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-12 15:03:10,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-12 15:03:10,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 91 transitions. [2022-12-12 15:03:10,957 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3684210526315789 [2022-12-12 15:03:10,957 INFO L175 Difference]: Start difference. First operand has 123 places, 109 transitions, 1330 flow. Second operand 13 states and 91 transitions. [2022-12-12 15:03:10,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 148 transitions, 1873 flow [2022-12-12 15:03:10,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 148 transitions, 1791 flow, removed 19 selfloop flow, removed 7 redundant places. [2022-12-12 15:03:10,988 INFO L231 Difference]: Finished difference. Result has 128 places, 106 transitions, 1293 flow [2022-12-12 15:03:10,988 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1235, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1293, PETRI_PLACES=128, PETRI_TRANSITIONS=106} [2022-12-12 15:03:10,989 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 107 predicate places. [2022-12-12 15:03:10,989 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 106 transitions, 1293 flow [2022-12-12 15:03:10,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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 15:03:10,989 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:03:10,989 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:03:11,001 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 15:03:11,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:03:11,194 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 15:03:11,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:03:11,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1476191076, now seen corresponding path program 7 times [2022-12-12 15:03:11,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:03:11,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231730398] [2022-12-12 15:03:11,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:03:11,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:03:11,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:03:11,681 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:03:11,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:03:11,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231730398] [2022-12-12 15:03:11,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231730398] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:03:11,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534334364] [2022-12-12 15:03:11,681 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 15:03:11,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:03:11,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:03:11,696 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 15:03:11,741 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 15:03:11,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:03:11,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-12 15:03:11,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:03:12,172 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:03:12,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:03:12,322 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 15:03:12,322 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 20 treesize of output 4 [2022-12-12 15:03:12,355 INFO L321 Elim1Store]: treesize reduction 34, result has 62.6 percent of original size [2022-12-12 15:03:12,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 64 [2022-12-12 15:03:12,369 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 15:03:12,369 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 20 treesize of output 4 [2022-12-12 15:03:12,608 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:03:12,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534334364] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:03:12,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:03:12,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 32 [2022-12-12 15:03:12,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305726463] [2022-12-12 15:03:12,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:03:12,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-12 15:03:12,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:03:12,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-12 15:03:12,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2022-12-12 15:03:12,610 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:03:12,610 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 106 transitions, 1293 flow. Second operand has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 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 15:03:12,610 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:03:12,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:03:12,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:03:13,208 INFO L130 PetriNetUnfolder]: 597/1108 cut-off events. [2022-12-12 15:03:13,208 INFO L131 PetriNetUnfolder]: For 13203/13203 co-relation queries the response was YES. [2022-12-12 15:03:13,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7383 conditions, 1108 events. 597/1108 cut-off events. For 13203/13203 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5589 event pairs, 158 based on Foata normal form. 2/1110 useless extension candidates. Maximal degree in co-relation 7317. Up to 1011 conditions per place. [2022-12-12 15:03:13,216 INFO L137 encePairwiseOnDemand]: 8/19 looper letters, 88 selfloop transitions, 29 changer transitions 2/119 dead transitions. [2022-12-12 15:03:13,216 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 119 transitions, 1611 flow [2022-12-12 15:03:13,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-12 15:03:13,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-12 15:03:13,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 55 transitions. [2022-12-12 15:03:13,217 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.20676691729323307 [2022-12-12 15:03:13,217 INFO L175 Difference]: Start difference. First operand has 128 places, 106 transitions, 1293 flow. Second operand 14 states and 55 transitions. [2022-12-12 15:03:13,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 119 transitions, 1611 flow [2022-12-12 15:03:13,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 119 transitions, 1537 flow, removed 0 selfloop flow, removed 10 redundant places. [2022-12-12 15:03:13,240 INFO L231 Difference]: Finished difference. Result has 130 places, 106 transitions, 1284 flow [2022-12-12 15:03:13,241 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1219, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1284, PETRI_PLACES=130, PETRI_TRANSITIONS=106} [2022-12-12 15:03:13,241 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 109 predicate places. [2022-12-12 15:03:13,241 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 106 transitions, 1284 flow [2022-12-12 15:03:13,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 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 15:03:13,241 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:03:13,241 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:03:13,256 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 15:03:13,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:03:13,446 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 15:03:13,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:03:13,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1100432514, now seen corresponding path program 8 times [2022-12-12 15:03:13,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:03:13,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081120545] [2022-12-12 15:03:13,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:03:13,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:03:13,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:03:13,929 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:03:13,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:03:13,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081120545] [2022-12-12 15:03:13,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081120545] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:03:13,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162288604] [2022-12-12 15:03:13,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 15:03:13,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:03:13,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:03:13,962 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 15:03:13,964 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 15:03:14,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 15:03:14,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:03:14,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-12 15:03:14,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:03:14,311 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:03:14,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:03:14,525 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 15:03:14,526 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 20 treesize of output 4 [2022-12-12 15:03:14,556 INFO L321 Elim1Store]: treesize reduction 34, result has 62.6 percent of original size [2022-12-12 15:03:14,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 64 [2022-12-12 15:03:14,566 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 15:03:14,567 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 20 treesize of output 4 [2022-12-12 15:03:14,764 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:03:14,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162288604] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:03:14,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:03:14,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 32 [2022-12-12 15:03:14,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822653162] [2022-12-12 15:03:14,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:03:14,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-12 15:03:14,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:03:14,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-12 15:03:14,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2022-12-12 15:03:14,766 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:03:14,766 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 106 transitions, 1284 flow. Second operand has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 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 15:03:14,766 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:03:14,767 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:03:14,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:03:15,410 INFO L130 PetriNetUnfolder]: 620/1153 cut-off events. [2022-12-12 15:03:15,411 INFO L131 PetriNetUnfolder]: For 15086/15086 co-relation queries the response was YES. [2022-12-12 15:03:15,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7741 conditions, 1153 events. 620/1153 cut-off events. For 15086/15086 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5899 event pairs, 140 based on Foata normal form. 24/1177 useless extension candidates. Maximal degree in co-relation 7672. Up to 993 conditions per place. [2022-12-12 15:03:15,417 INFO L137 encePairwiseOnDemand]: 8/19 looper letters, 105 selfloop transitions, 38 changer transitions 5/148 dead transitions. [2022-12-12 15:03:15,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 148 transitions, 1897 flow [2022-12-12 15:03:15,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-12 15:03:15,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-12 15:03:15,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 81 transitions. [2022-12-12 15:03:15,423 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.25077399380804954 [2022-12-12 15:03:15,423 INFO L175 Difference]: Start difference. First operand has 130 places, 106 transitions, 1284 flow. Second operand 17 states and 81 transitions. [2022-12-12 15:03:15,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 148 transitions, 1897 flow [2022-12-12 15:03:15,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 148 transitions, 1831 flow, removed 1 selfloop flow, removed 12 redundant places. [2022-12-12 15:03:15,449 INFO L231 Difference]: Finished difference. Result has 134 places, 111 transitions, 1372 flow [2022-12-12 15:03:15,449 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1372, PETRI_PLACES=134, PETRI_TRANSITIONS=111} [2022-12-12 15:03:15,449 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 113 predicate places. [2022-12-12 15:03:15,449 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 111 transitions, 1372 flow [2022-12-12 15:03:15,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 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 15:03:15,449 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:03:15,449 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:03:15,456 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 15:03:15,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:03:15,654 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 15:03:15,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:03:15,655 INFO L85 PathProgramCache]: Analyzing trace with hash 333395525, now seen corresponding path program 4 times [2022-12-12 15:03:15,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:03:15,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521286770] [2022-12-12 15:03:15,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:03:15,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:03:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:03:15,916 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:03:15,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:03:15,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521286770] [2022-12-12 15:03:15,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521286770] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:03:15,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718155022] [2022-12-12 15:03:15,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 15:03:15,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:03:15,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:03:15,933 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 15:03:15,949 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 15:03:16,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 15:03:16,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:03:16,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-12 15:03:16,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:03:16,113 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:03:16,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:03:16,168 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-12 15:03:16,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-12-12 15:03:16,213 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:03:16,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718155022] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:03:16,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:03:16,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 17 [2022-12-12 15:03:16,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561642904] [2022-12-12 15:03:16,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:03:16,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 15:03:16,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:03:16,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 15:03:16,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-12-12 15:03:16,214 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:03:16,214 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 111 transitions, 1372 flow. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 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 15:03:16,214 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:03:16,214 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:03:16,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:03:16,629 INFO L130 PetriNetUnfolder]: 656/1209 cut-off events. [2022-12-12 15:03:16,629 INFO L131 PetriNetUnfolder]: For 17606/17606 co-relation queries the response was YES. [2022-12-12 15:03:16,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8510 conditions, 1209 events. 656/1209 cut-off events. For 17606/17606 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 6208 event pairs, 96 based on Foata normal form. 8/1217 useless extension candidates. Maximal degree in co-relation 8440. Up to 823 conditions per place. [2022-12-12 15:03:16,636 INFO L137 encePairwiseOnDemand]: 13/19 looper letters, 114 selfloop transitions, 47 changer transitions 5/166 dead transitions. [2022-12-12 15:03:16,637 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 166 transitions, 2295 flow [2022-12-12 15:03:16,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-12 15:03:16,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-12 15:03:16,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 98 transitions. [2022-12-12 15:03:16,638 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3684210526315789 [2022-12-12 15:03:16,638 INFO L175 Difference]: Start difference. First operand has 134 places, 111 transitions, 1372 flow. Second operand 14 states and 98 transitions. [2022-12-12 15:03:16,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 166 transitions, 2295 flow [2022-12-12 15:03:16,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 166 transitions, 2203 flow, removed 9 selfloop flow, removed 13 redundant places. [2022-12-12 15:03:16,672 INFO L231 Difference]: Finished difference. Result has 136 places, 116 transitions, 1465 flow [2022-12-12 15:03:16,673 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1280, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1465, PETRI_PLACES=136, PETRI_TRANSITIONS=116} [2022-12-12 15:03:16,677 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 115 predicate places. [2022-12-12 15:03:16,677 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 116 transitions, 1465 flow [2022-12-12 15:03:16,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 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 15:03:16,678 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:03:16,678 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:03:16,685 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 15:03:16,882 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,SelfDestructingSolverStorable27 [2022-12-12 15:03:16,883 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 15:03:16,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:03:16,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1866735208, now seen corresponding path program 9 times [2022-12-12 15:03:16,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:03:16,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747435151] [2022-12-12 15:03:16,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:03:16,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:03:16,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:03:17,300 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:03:17,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:03:17,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747435151] [2022-12-12 15:03:17,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747435151] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:03:17,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690973777] [2022-12-12 15:03:17,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 15:03:17,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:03:17,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:03:17,324 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 15:03:17,371 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 15:03:17,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-12 15:03:17,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:03:17,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-12 15:03:17,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:03:17,793 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:03:17,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:03:17,897 INFO L321 Elim1Store]: treesize reduction 11, result has 87.1 percent of original size [2022-12-12 15:03:17,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 88 [2022-12-12 15:03:18,230 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:03:18,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690973777] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:03:18,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:03:18,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 29 [2022-12-12 15:03:18,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940426688] [2022-12-12 15:03:18,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:03:18,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-12 15:03:18,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:03:18,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-12 15:03:18,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2022-12-12 15:03:18,246 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:03:18,246 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 116 transitions, 1465 flow. Second operand has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 29 states have internal predecessors, (49), 0 states have call successors, (0), 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 15:03:18,246 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:03:18,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:03:18,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:03:18,817 INFO L130 PetriNetUnfolder]: 655/1210 cut-off events. [2022-12-12 15:03:18,817 INFO L131 PetriNetUnfolder]: For 19316/19316 co-relation queries the response was YES. [2022-12-12 15:03:18,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8706 conditions, 1210 events. 655/1210 cut-off events. For 19316/19316 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6245 event pairs, 166 based on Foata normal form. 2/1212 useless extension candidates. Maximal degree in co-relation 8635. Up to 1086 conditions per place. [2022-12-12 15:03:18,825 INFO L137 encePairwiseOnDemand]: 10/19 looper letters, 99 selfloop transitions, 32 changer transitions 6/137 dead transitions. [2022-12-12 15:03:18,825 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 137 transitions, 1923 flow [2022-12-12 15:03:18,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-12 15:03:18,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-12 15:03:18,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 55 transitions. [2022-12-12 15:03:18,838 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.22267206477732793 [2022-12-12 15:03:18,839 INFO L175 Difference]: Start difference. First operand has 136 places, 116 transitions, 1465 flow. Second operand 13 states and 55 transitions. [2022-12-12 15:03:18,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 137 transitions, 1923 flow [2022-12-12 15:03:18,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 137 transitions, 1826 flow, removed 10 selfloop flow, removed 9 redundant places. [2022-12-12 15:03:18,875 INFO L231 Difference]: Finished difference. Result has 141 places, 119 transitions, 1500 flow [2022-12-12 15:03:18,875 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1372, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1500, PETRI_PLACES=141, PETRI_TRANSITIONS=119} [2022-12-12 15:03:18,878 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 120 predicate places. [2022-12-12 15:03:18,878 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 119 transitions, 1500 flow [2022-12-12 15:03:18,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 29 states have internal predecessors, (49), 0 states have call successors, (0), 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 15:03:18,878 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:03:18,878 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:03:18,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-12 15:03:19,082 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,SelfDestructingSolverStorable28 [2022-12-12 15:03:19,083 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 15:03:19,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:03:19,083 INFO L85 PathProgramCache]: Analyzing trace with hash 458796714, now seen corresponding path program 10 times [2022-12-12 15:03:19,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:03:19,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512162242] [2022-12-12 15:03:19,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:03:19,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:03:19,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:03:19,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:03:19,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:03:19,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512162242] [2022-12-12 15:03:19,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512162242] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:03:19,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235482167] [2022-12-12 15:03:19,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 15:03:19,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:03:19,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:03:19,639 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 15:03:19,641 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 15:03:19,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 15:03:19,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:03:19,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-12 15:03:19,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:03:19,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:03:19,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:03:20,834 INFO L321 Elim1Store]: treesize reduction 17, result has 92.1 percent of original size [2022-12-12 15:03:20,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 89 treesize of output 224 [2022-12-12 15:03:22,684 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-12 15:03:22,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235482167] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:03:22,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:03:22,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 5] total 22 [2022-12-12 15:03:22,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049537291] [2022-12-12 15:03:22,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:03:22,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-12 15:03:22,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:03:22,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-12 15:03:22,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-12-12 15:03:22,686 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:03:22,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 119 transitions, 1500 flow. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 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 15:03:22,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:03:22,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:03:22,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:03:23,319 INFO L130 PetriNetUnfolder]: 724/1393 cut-off events. [2022-12-12 15:03:23,320 INFO L131 PetriNetUnfolder]: For 23813/23813 co-relation queries the response was YES. [2022-12-12 15:03:23,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9828 conditions, 1393 events. 724/1393 cut-off events. For 23813/23813 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7661 event pairs, 151 based on Foata normal form. 48/1441 useless extension candidates. Maximal degree in co-relation 9754. Up to 973 conditions per place. [2022-12-12 15:03:23,328 INFO L137 encePairwiseOnDemand]: 9/19 looper letters, 133 selfloop transitions, 58 changer transitions 7/198 dead transitions. [2022-12-12 15:03:23,329 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 198 transitions, 2522 flow [2022-12-12 15:03:23,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-12 15:03:23,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-12 15:03:23,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 133 transitions. [2022-12-12 15:03:23,330 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2022-12-12 15:03:23,330 INFO L175 Difference]: Start difference. First operand has 141 places, 119 transitions, 1500 flow. Second operand 21 states and 133 transitions. [2022-12-12 15:03:23,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 198 transitions, 2522 flow [2022-12-12 15:03:23,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 198 transitions, 2424 flow, removed 18 selfloop flow, removed 10 redundant places. [2022-12-12 15:03:23,373 INFO L231 Difference]: Finished difference. Result has 154 places, 129 transitions, 1698 flow [2022-12-12 15:03:23,373 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1420, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1698, PETRI_PLACES=154, PETRI_TRANSITIONS=129} [2022-12-12 15:03:23,373 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 133 predicate places. [2022-12-12 15:03:23,374 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 129 transitions, 1698 flow [2022-12-12 15:03:23,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 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 15:03:23,374 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:03:23,374 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:03:23,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-12 15:03:23,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:03:23,579 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:03:23,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:03:23,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1259546992, now seen corresponding path program 11 times [2022-12-12 15:03:23,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:03:23,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460840794] [2022-12-12 15:03:23,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:03:23,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:03:23,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:03:24,024 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:03:24,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:03:24,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460840794] [2022-12-12 15:03:24,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460840794] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:03:24,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901972436] [2022-12-12 15:03:24,025 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 15:03:24,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:03:24,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:03:24,040 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 15:03:24,089 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 15:03:24,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-12 15:03:24,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:03:24,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-12 15:03:24,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:03:24,333 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:03:24,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:03:24,472 INFO L321 Elim1Store]: treesize reduction 47, result has 76.4 percent of original size [2022-12-12 15:03:24,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 89 treesize of output 177 [2022-12-12 15:03:24,590 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-12 15:03:24,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901972436] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:03:24,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:03:24,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 5] total 23 [2022-12-12 15:03:24,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902056529] [2022-12-12 15:03:24,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:03:24,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-12 15:03:24,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:03:24,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-12 15:03:24,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-12-12 15:03:24,592 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:03:24,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 129 transitions, 1698 flow. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 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 15:03:24,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:03:24,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:03:24,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:03:25,207 INFO L130 PetriNetUnfolder]: 713/1352 cut-off events. [2022-12-12 15:03:25,207 INFO L131 PetriNetUnfolder]: For 26980/26980 co-relation queries the response was YES. [2022-12-12 15:03:25,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10217 conditions, 1352 events. 713/1352 cut-off events. For 26980/26980 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 7262 event pairs, 164 based on Foata normal form. 4/1356 useless extension candidates. Maximal degree in co-relation 10139. Up to 1063 conditions per place. [2022-12-12 15:03:25,216 INFO L137 encePairwiseOnDemand]: 10/19 looper letters, 102 selfloop transitions, 49 changer transitions 9/160 dead transitions. [2022-12-12 15:03:25,216 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 160 transitions, 2242 flow [2022-12-12 15:03:25,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-12 15:03:25,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-12 15:03:25,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 84 transitions. [2022-12-12 15:03:25,218 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.26006191950464397 [2022-12-12 15:03:25,218 INFO L175 Difference]: Start difference. First operand has 154 places, 129 transitions, 1698 flow. Second operand 17 states and 84 transitions. [2022-12-12 15:03:25,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 160 transitions, 2242 flow [2022-12-12 15:03:25,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 160 transitions, 2167 flow, removed 10 selfloop flow, removed 11 redundant places. [2022-12-12 15:03:25,273 INFO L231 Difference]: Finished difference. Result has 161 places, 128 transitions, 1714 flow [2022-12-12 15:03:25,273 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1606, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1714, PETRI_PLACES=161, PETRI_TRANSITIONS=128} [2022-12-12 15:03:25,273 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 140 predicate places. [2022-12-12 15:03:25,274 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 128 transitions, 1714 flow [2022-12-12 15:03:25,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 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 15:03:25,274 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:03:25,274 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:03:25,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-12 15:03:25,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:03:25,478 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:03:25,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:03:25,479 INFO L85 PathProgramCache]: Analyzing trace with hash -573515681, now seen corresponding path program 5 times [2022-12-12 15:03:25,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:03:25,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462736840] [2022-12-12 15:03:25,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:03:25,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:03:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:03:25,730 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:03:25,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:03:25,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462736840] [2022-12-12 15:03:25,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462736840] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:03:25,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671655474] [2022-12-12 15:03:25,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 15:03:25,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:03:25,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:03:25,742 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:03:25,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-12 15:03:25,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-12 15:03:25,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:03:25,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-12 15:03:25,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:03:25,969 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:03:25,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:03:26,025 INFO L321 Elim1Store]: treesize reduction 34, result has 62.6 percent of original size [2022-12-12 15:03:26,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 64 [2022-12-12 15:03:26,061 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:03:26,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671655474] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:03:26,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:03:26,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 17 [2022-12-12 15:03:26,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477218480] [2022-12-12 15:03:26,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:03:26,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 15:03:26,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:03:26,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 15:03:26,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-12-12 15:03:26,062 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:03:26,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 128 transitions, 1714 flow. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 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 15:03:26,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:03:26,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:03:26,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:03:26,621 INFO L130 PetriNetUnfolder]: 805/1512 cut-off events. [2022-12-12 15:03:26,621 INFO L131 PetriNetUnfolder]: For 34763/34763 co-relation queries the response was YES. [2022-12-12 15:03:26,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11783 conditions, 1512 events. 805/1512 cut-off events. For 34763/34763 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 8290 event pairs, 115 based on Foata normal form. 32/1544 useless extension candidates. Maximal degree in co-relation 11702. Up to 987 conditions per place. [2022-12-12 15:03:26,633 INFO L137 encePairwiseOnDemand]: 13/19 looper letters, 163 selfloop transitions, 47 changer transitions 1/211 dead transitions. [2022-12-12 15:03:26,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 211 transitions, 3239 flow [2022-12-12 15:03:26,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-12 15:03:26,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-12 15:03:26,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 108 transitions. [2022-12-12 15:03:26,634 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.33436532507739936 [2022-12-12 15:03:26,634 INFO L175 Difference]: Start difference. First operand has 161 places, 128 transitions, 1714 flow. Second operand 17 states and 108 transitions. [2022-12-12 15:03:26,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 211 transitions, 3239 flow [2022-12-12 15:03:26,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 211 transitions, 3141 flow, removed 0 selfloop flow, removed 14 redundant places. [2022-12-12 15:03:26,697 INFO L231 Difference]: Finished difference. Result has 166 places, 147 transitions, 1999 flow [2022-12-12 15:03:26,697 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1616, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1999, PETRI_PLACES=166, PETRI_TRANSITIONS=147} [2022-12-12 15:03:26,697 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 145 predicate places. [2022-12-12 15:03:26,697 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 147 transitions, 1999 flow [2022-12-12 15:03:26,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 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 15:03:26,698 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:03:26,698 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:03:26,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-12-12 15:03:26,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:03:26,903 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:03:26,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:03:26,903 INFO L85 PathProgramCache]: Analyzing trace with hash -739857500, now seen corresponding path program 12 times [2022-12-12 15:03:26,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:03:26,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288443859] [2022-12-12 15:03:26,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:03:26,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:03:26,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:03:27,339 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:03:27,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:03:27,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288443859] [2022-12-12 15:03:27,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288443859] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:03:27,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934473915] [2022-12-12 15:03:27,339 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 15:03:27,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:03:27,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:03:27,341 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:03:27,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-12 15:03:27,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-12 15:03:27,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:03:27,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-12 15:03:27,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:03:27,583 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:03:27,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:03:27,676 INFO L321 Elim1Store]: treesize reduction 30, result has 67.0 percent of original size [2022-12-12 15:03:27,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 75 [2022-12-12 15:03:27,735 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:03:27,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934473915] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:03:27,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:03:27,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 6] total 24 [2022-12-12 15:03:27,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632947246] [2022-12-12 15:03:27,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:03:27,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-12 15:03:27,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:03:27,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-12 15:03:27,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-12-12 15:03:27,737 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:03:27,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 147 transitions, 1999 flow. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 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 15:03:27,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:03:27,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:03:27,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:03:28,549 INFO L130 PetriNetUnfolder]: 813/1548 cut-off events. [2022-12-12 15:03:28,549 INFO L131 PetriNetUnfolder]: For 39467/39467 co-relation queries the response was YES. [2022-12-12 15:03:28,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12542 conditions, 1548 events. 813/1548 cut-off events. For 39467/39467 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8695 event pairs, 130 based on Foata normal form. 10/1558 useless extension candidates. Maximal degree in co-relation 12457. Up to 1027 conditions per place. [2022-12-12 15:03:28,559 INFO L137 encePairwiseOnDemand]: 7/19 looper letters, 155 selfloop transitions, 41 changer transitions 34/230 dead transitions. [2022-12-12 15:03:28,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 230 transitions, 3412 flow [2022-12-12 15:03:28,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-12 15:03:28,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-12 15:03:28,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 104 transitions. [2022-12-12 15:03:28,561 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2606516290726817 [2022-12-12 15:03:28,561 INFO L175 Difference]: Start difference. First operand has 166 places, 147 transitions, 1999 flow. Second operand 21 states and 104 transitions. [2022-12-12 15:03:28,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 230 transitions, 3412 flow [2022-12-12 15:03:28,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 230 transitions, 3231 flow, removed 57 selfloop flow, removed 7 redundant places. [2022-12-12 15:03:28,641 INFO L231 Difference]: Finished difference. Result has 187 places, 153 transitions, 2105 flow [2022-12-12 15:03:28,641 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1856, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2105, PETRI_PLACES=187, PETRI_TRANSITIONS=153} [2022-12-12 15:03:28,641 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 166 predicate places. [2022-12-12 15:03:28,641 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 153 transitions, 2105 flow [2022-12-12 15:03:28,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 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 15:03:28,641 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:03:28,642 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:03:28,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-12 15:03:28,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-12 15:03:28,846 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:03:28,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:03:28,847 INFO L85 PathProgramCache]: Analyzing trace with hash -86936192, now seen corresponding path program 13 times [2022-12-12 15:03:28,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:03:28,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850555329] [2022-12-12 15:03:28,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:03:28,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:03:28,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:03:29,281 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:03:29,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:03:29,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850555329] [2022-12-12 15:03:29,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850555329] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:03:29,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359857407] [2022-12-12 15:03:29,282 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 15:03:29,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:03:29,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:03:29,283 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:03:29,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-12 15:03:29,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:03:29,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-12 15:03:29,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:03:29,628 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:03:29,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:03:29,729 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 15:03:29,729 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 20 treesize of output 4 [2022-12-12 15:03:29,733 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 15:03:29,734 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 20 treesize of output 4 [2022-12-12 15:03:29,763 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-12 15:03:29,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-12-12 15:03:30,030 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:03:30,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359857407] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:03:30,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:03:30,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 32 [2022-12-12 15:03:30,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654240224] [2022-12-12 15:03:30,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:03:30,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-12 15:03:30,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:03:30,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-12 15:03:30,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2022-12-12 15:03:30,032 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:03:30,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 153 transitions, 2105 flow. Second operand has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 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 15:03:30,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:03:30,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:03:30,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:03:30,708 INFO L130 PetriNetUnfolder]: 800/1533 cut-off events. [2022-12-12 15:03:30,709 INFO L131 PetriNetUnfolder]: For 48632/48632 co-relation queries the response was YES. [2022-12-12 15:03:30,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13075 conditions, 1533 events. 800/1533 cut-off events. For 48632/48632 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 8680 event pairs, 208 based on Foata normal form. 12/1545 useless extension candidates. Maximal degree in co-relation 12981. Up to 1372 conditions per place. [2022-12-12 15:03:30,721 INFO L137 encePairwiseOnDemand]: 8/19 looper letters, 146 selfloop transitions, 36 changer transitions 2/184 dead transitions. [2022-12-12 15:03:30,721 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 184 transitions, 2817 flow [2022-12-12 15:03:30,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-12 15:03:30,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-12 15:03:30,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 70 transitions. [2022-12-12 15:03:30,722 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.24561403508771928 [2022-12-12 15:03:30,722 INFO L175 Difference]: Start difference. First operand has 187 places, 153 transitions, 2105 flow. Second operand 15 states and 70 transitions. [2022-12-12 15:03:30,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 184 transitions, 2817 flow [2022-12-12 15:03:30,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 184 transitions, 2652 flow, removed 68 selfloop flow, removed 11 redundant places. [2022-12-12 15:03:30,828 INFO L231 Difference]: Finished difference. Result has 187 places, 156 transitions, 2159 flow [2022-12-12 15:03:30,828 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=2002, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2159, PETRI_PLACES=187, PETRI_TRANSITIONS=156} [2022-12-12 15:03:30,828 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 166 predicate places. [2022-12-12 15:03:30,828 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 156 transitions, 2159 flow [2022-12-12 15:03:30,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 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 15:03:30,828 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:03:30,829 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:03:30,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-12-12 15:03:31,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-12-12 15:03:31,033 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:03:31,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:03:31,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1603904551, now seen corresponding path program 6 times [2022-12-12 15:03:31,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:03:31,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984453011] [2022-12-12 15:03:31,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:03:31,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:03:31,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:03:31,305 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:03:31,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:03:31,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984453011] [2022-12-12 15:03:31,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984453011] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:03:31,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314677855] [2022-12-12 15:03:31,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 15:03:31,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:03:31,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:03:31,307 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:03:31,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-12 15:03:31,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 15:03:31,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:03:31,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-12 15:03:31,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:03:31,512 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 13 treesize of output 9 [2022-12-12 15:03:31,547 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 15:03:31,573 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 15:03:31,687 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 15:03:31,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:03:31,946 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:03:31,946 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 15:03:31,987 INFO L321 Elim1Store]: treesize reduction 34, result has 62.6 percent of original size [2022-12-12 15:03:31,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1740 treesize of output 1524 [2022-12-12 15:03:32,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 15:03:32,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 15:03:32,028 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:03:32,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 1468 treesize of output 1310 [2022-12-12 15:03:32,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 15:03:32,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 15:03:32,062 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:03:32,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 1260 treesize of output 894 [2022-12-12 15:03:33,411 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 15:03:33,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314677855] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:03:33,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:03:33,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 28 [2022-12-12 15:03:33,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415696392] [2022-12-12 15:03:33,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:03:33,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-12 15:03:33,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:03:33,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-12 15:03:33,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=691, Unknown=7, NotChecked=0, Total=812 [2022-12-12 15:03:33,412 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:03:33,412 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 156 transitions, 2159 flow. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 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 15:03:33,412 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:03:33,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:03:33,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:03:50,067 WARN L233 SmtUtils]: Spent 8.13s on a formula simplification. DAG size of input: 88 DAG size of output: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 15:03:54,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:03:54,935 INFO L130 PetriNetUnfolder]: 2230/4310 cut-off events. [2022-12-12 15:03:54,936 INFO L131 PetriNetUnfolder]: For 142242/142242 co-relation queries the response was YES. [2022-12-12 15:03:54,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35793 conditions, 4310 events. 2230/4310 cut-off events. For 142242/142242 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 30201 event pairs, 209 based on Foata normal form. 62/4372 useless extension candidates. Maximal degree in co-relation 35699. Up to 1368 conditions per place. [2022-12-12 15:03:54,971 INFO L137 encePairwiseOnDemand]: 8/19 looper letters, 424 selfloop transitions, 315 changer transitions 28/767 dead transitions. [2022-12-12 15:03:54,971 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 767 transitions, 11168 flow [2022-12-12 15:03:54,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-12-12 15:03:54,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-12-12 15:03:54,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 485 transitions. [2022-12-12 15:03:54,980 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.34035087719298246 [2022-12-12 15:03:54,980 INFO L175 Difference]: Start difference. First operand has 187 places, 156 transitions, 2159 flow. Second operand 75 states and 485 transitions. [2022-12-12 15:03:54,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 767 transitions, 11168 flow [2022-12-12 15:03:55,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 767 transitions, 10841 flow, removed 75 selfloop flow, removed 13 redundant places. [2022-12-12 15:03:55,263 INFO L231 Difference]: Finished difference. Result has 290 places, 438 transitions, 7760 flow [2022-12-12 15:03:55,264 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=2023, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=7760, PETRI_PLACES=290, PETRI_TRANSITIONS=438} [2022-12-12 15:03:55,264 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 269 predicate places. [2022-12-12 15:03:55,264 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 438 transitions, 7760 flow [2022-12-12 15:03:55,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 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 15:03:55,264 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:03:55,264 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:03:55,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-12-12 15:03:55,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-12 15:03:55,469 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:03:55,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:03:55,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1211060389, now seen corresponding path program 7 times [2022-12-12 15:03:55,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:03:55,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472267264] [2022-12-12 15:03:55,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:03:55,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:03:55,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:03:55,753 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:03:55,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:03:55,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472267264] [2022-12-12 15:03:55,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472267264] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:03:55,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032525821] [2022-12-12 15:03:55,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 15:03:55,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:03:55,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:03:55,755 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:03:55,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-12 15:03:55,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:03:55,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-12 15:03:55,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:03:56,009 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:03:56,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:03:56,109 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-12 15:03:56,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-12-12 15:03:56,162 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-12 15:03:56,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032525821] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:03:56,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:03:56,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 5] total 17 [2022-12-12 15:03:56,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564284684] [2022-12-12 15:03:56,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:03:56,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 15:03:56,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:03:56,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 15:03:56,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-12-12 15:03:56,164 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:03:56,164 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 438 transitions, 7760 flow. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 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 15:03:56,164 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:03:56,164 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:03:56,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:03:57,315 INFO L130 PetriNetUnfolder]: 2149/4153 cut-off events. [2022-12-12 15:03:57,316 INFO L131 PetriNetUnfolder]: For 300902/300902 co-relation queries the response was YES. [2022-12-12 15:03:57,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45199 conditions, 4153 events. 2149/4153 cut-off events. For 300902/300902 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 28698 event pairs, 524 based on Foata normal form. 23/4176 useless extension candidates. Maximal degree in co-relation 45065. Up to 3826 conditions per place. [2022-12-12 15:03:57,360 INFO L137 encePairwiseOnDemand]: 13/19 looper letters, 355 selfloop transitions, 82 changer transitions 21/458 dead transitions. [2022-12-12 15:03:57,360 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 458 transitions, 8767 flow [2022-12-12 15:03:57,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-12 15:03:57,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-12 15:03:57,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 74 transitions. [2022-12-12 15:03:57,362 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.32456140350877194 [2022-12-12 15:03:57,362 INFO L175 Difference]: Start difference. First operand has 290 places, 438 transitions, 7760 flow. Second operand 12 states and 74 transitions. [2022-12-12 15:03:57,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 458 transitions, 8767 flow [2022-12-12 15:03:58,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 458 transitions, 7112 flow, removed 803 selfloop flow, removed 4 redundant places. [2022-12-12 15:03:58,219 INFO L231 Difference]: Finished difference. Result has 294 places, 423 transitions, 6121 flow [2022-12-12 15:03:58,219 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=6027, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6121, PETRI_PLACES=294, PETRI_TRANSITIONS=423} [2022-12-12 15:03:58,220 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 273 predicate places. [2022-12-12 15:03:58,220 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 423 transitions, 6121 flow [2022-12-12 15:03:58,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 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 15:03:58,220 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:03:58,220 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:03:58,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-12-12 15:03:58,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:03:58,425 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:03:58,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:03:58,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1805279898, now seen corresponding path program 14 times [2022-12-12 15:03:58,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:03:58,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359354354] [2022-12-12 15:03:58,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:03:58,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:03:58,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:03:58,866 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:03:58,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:03:58,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359354354] [2022-12-12 15:03:58,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359354354] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:03:58,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102027616] [2022-12-12 15:03:58,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 15:03:58,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:03:58,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:03:58,868 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:03:58,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-12 15:03:58,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 15:03:58,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:03:58,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-12 15:03:58,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:03:59,331 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:03:59,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:03:59,452 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 15:03:59,452 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 20 treesize of output 4 [2022-12-12 15:03:59,458 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 15:03:59,458 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 20 treesize of output 4 [2022-12-12 15:03:59,500 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-12 15:03:59,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-12-12 15:03:59,830 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:03:59,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102027616] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:03:59,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:03:59,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 32 [2022-12-12 15:03:59,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962657898] [2022-12-12 15:03:59,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:03:59,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-12 15:03:59,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:03:59,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-12 15:03:59,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2022-12-12 15:03:59,831 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:03:59,831 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 423 transitions, 6121 flow. Second operand has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 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 15:03:59,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:03:59,831 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:03:59,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:04:01,407 INFO L130 PetriNetUnfolder]: 2102/4014 cut-off events. [2022-12-12 15:04:01,408 INFO L131 PetriNetUnfolder]: For 266130/266130 co-relation queries the response was YES. [2022-12-12 15:04:01,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39687 conditions, 4014 events. 2102/4014 cut-off events. For 266130/266130 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 27202 event pairs, 514 based on Foata normal form. 4/4018 useless extension candidates. Maximal degree in co-relation 39551. Up to 3916 conditions per place. [2022-12-12 15:04:01,455 INFO L137 encePairwiseOnDemand]: 9/19 looper letters, 381 selfloop transitions, 46 changer transitions 3/430 dead transitions. [2022-12-12 15:04:01,455 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 430 transitions, 7004 flow [2022-12-12 15:04:01,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-12 15:04:01,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-12 15:04:01,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 48 transitions. [2022-12-12 15:04:01,456 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.18045112781954886 [2022-12-12 15:04:01,456 INFO L175 Difference]: Start difference. First operand has 294 places, 423 transitions, 6121 flow. Second operand 14 states and 48 transitions. [2022-12-12 15:04:01,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 430 transitions, 7004 flow [2022-12-12 15:04:02,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 430 transitions, 6791 flow, removed 12 selfloop flow, removed 10 redundant places. [2022-12-12 15:04:02,066 INFO L231 Difference]: Finished difference. Result has 291 places, 421 transitions, 5966 flow [2022-12-12 15:04:02,066 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=5866, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5966, PETRI_PLACES=291, PETRI_TRANSITIONS=421} [2022-12-12 15:04:02,067 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 270 predicate places. [2022-12-12 15:04:02,067 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 421 transitions, 5966 flow [2022-12-12 15:04:02,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 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 15:04:02,067 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:04:02,068 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:04:02,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-12-12 15:04:02,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-12 15:04:02,270 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:04:02,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:04:02,271 INFO L85 PathProgramCache]: Analyzing trace with hash 576700743, now seen corresponding path program 8 times [2022-12-12 15:04:02,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:04:02,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414603406] [2022-12-12 15:04:02,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:04:02,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:04:02,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:04:02,720 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:04:02,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:04:02,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414603406] [2022-12-12 15:04:02,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414603406] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:04:02,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206483745] [2022-12-12 15:04:02,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 15:04:02,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:04:02,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:04:02,722 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:04:02,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-12 15:04:02,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 15:04:02,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:04:02,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-12 15:04:02,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:04:03,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 15:04:03,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 15:04:03,071 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-12 15:04:03,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 28 [2022-12-12 15:04:03,133 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:04:03,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:04:03,343 INFO L321 Elim1Store]: treesize reduction 15, result has 83.5 percent of original size [2022-12-12 15:04:03,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 130 treesize of output 153 [2022-12-12 15:04:03,354 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:04:03,354 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 74 treesize of output 55 [2022-12-12 15:04:03,636 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:04:03,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206483745] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:04:03,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:04:03,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2022-12-12 15:04:03,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366835350] [2022-12-12 15:04:03,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:04:03,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-12 15:04:03,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:04:03,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-12 15:04:03,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=565, Unknown=8, NotChecked=0, Total=650 [2022-12-12 15:04:03,637 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:04:03,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 421 transitions, 5966 flow. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 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 15:04:03,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:04:03,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:04:03,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:04:05,241 INFO L130 PetriNetUnfolder]: 2104/4030 cut-off events. [2022-12-12 15:04:05,241 INFO L131 PetriNetUnfolder]: For 266152/266152 co-relation queries the response was YES. [2022-12-12 15:04:05,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39452 conditions, 4030 events. 2104/4030 cut-off events. For 266152/266152 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 27437 event pairs, 413 based on Foata normal form. 8/4038 useless extension candidates. Maximal degree in co-relation 39315. Up to 3283 conditions per place. [2022-12-12 15:04:05,283 INFO L137 encePairwiseOnDemand]: 14/19 looper letters, 341 selfloop transitions, 108 changer transitions 17/466 dead transitions. [2022-12-12 15:04:05,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 466 transitions, 7533 flow [2022-12-12 15:04:05,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-12 15:04:05,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-12 15:04:05,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 78 transitions. [2022-12-12 15:04:05,284 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.37320574162679426 [2022-12-12 15:04:05,284 INFO L175 Difference]: Start difference. First operand has 291 places, 421 transitions, 5966 flow. Second operand 11 states and 78 transitions. [2022-12-12 15:04:05,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 466 transitions, 7533 flow [2022-12-12 15:04:05,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 466 transitions, 7441 flow, removed 0 selfloop flow, removed 12 redundant places. [2022-12-12 15:04:05,846 INFO L231 Difference]: Finished difference. Result has 289 places, 420 transitions, 6116 flow [2022-12-12 15:04:05,846 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=5874, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6116, PETRI_PLACES=289, PETRI_TRANSITIONS=420} [2022-12-12 15:04:05,847 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 268 predicate places. [2022-12-12 15:04:05,847 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 420 transitions, 6116 flow [2022-12-12 15:04:05,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 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 15:04:05,847 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:04:05,847 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:04:05,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-12-12 15:04:06,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-12 15:04:06,052 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:04:06,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:04:06,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1257768392, now seen corresponding path program 15 times [2022-12-12 15:04:06,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:04:06,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522551524] [2022-12-12 15:04:06,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:04:06,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:04:06,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:04:06,688 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:04:06,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:04:06,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522551524] [2022-12-12 15:04:06,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522551524] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:04:06,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621193747] [2022-12-12 15:04:06,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 15:04:06,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:04:06,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:04:06,690 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:04:06,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-12 15:04:06,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-12 15:04:06,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:04:06,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-12 15:04:06,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:04:07,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 15:04:07,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 15:04:07,417 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:04:07,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:04:07,682 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (* c_~i_AB~0 4))) (let ((.cse4 (+ c_~i_BA~0 1)) (.cse5 (forall ((~B~0.offset Int) (v_ArrVal_1483 (Array Int Int)) (~B~0.base Int)) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1483) ~B~0.base) (+ ~B~0.offset .cse3)) |c_thread1Thread1of1ForFork1_#t~mem1|))))) (and (forall ((~B~0.offset Int) (v_ArrVal_1483 (Array Int Int)) (~B~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1483))) (let ((.cse0 (select .cse2 ~B~0.base))) (or (let ((.cse1 (* c_~i_BA~0 4))) (= (select .cse0 (+ .cse1 ~B~0.offset 4)) (select (select .cse2 c_~A~0.base) (+ c_~A~0.offset .cse1 4)))) (not (= (select .cse0 (+ ~B~0.offset .cse3)) |c_thread1Thread1of1ForFork1_#t~mem1|)))))) (or (< .cse4 c_~An~0) .cse5) (or (< .cse4 c_~Bn~0) .cse5)))) is different from false [2022-12-12 15:04:07,696 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:04:07,696 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 36 [2022-12-12 15:04:07,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-12-12 15:04:07,718 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:04:07,719 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 36 [2022-12-12 15:04:07,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-12-12 15:04:07,781 INFO L321 Elim1Store]: treesize reduction 15, result has 83.5 percent of original size [2022-12-12 15:04:07,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 154 treesize of output 169 [2022-12-12 15:04:07,800 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:04:07,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 99 [2022-12-12 15:04:08,429 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:04:08,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621193747] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:04:08,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:04:08,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 36 [2022-12-12 15:04:08,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537288752] [2022-12-12 15:04:08,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:04:08,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-12 15:04:08,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:04:08,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-12 15:04:08,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1133, Unknown=1, NotChecked=68, Total=1332 [2022-12-12 15:04:08,431 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:04:08,435 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 420 transitions, 6116 flow. Second operand has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 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 15:04:08,435 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:04:08,435 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:04:08,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:04:10,191 INFO L130 PetriNetUnfolder]: 2196/4172 cut-off events. [2022-12-12 15:04:10,191 INFO L131 PetriNetUnfolder]: For 292330/292330 co-relation queries the response was YES. [2022-12-12 15:04:10,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41220 conditions, 4172 events. 2196/4172 cut-off events. For 292330/292330 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 28399 event pairs, 450 based on Foata normal form. 42/4214 useless extension candidates. Maximal degree in co-relation 41084. Up to 3562 conditions per place. [2022-12-12 15:04:10,237 INFO L137 encePairwiseOnDemand]: 9/19 looper letters, 383 selfloop transitions, 76 changer transitions 0/459 dead transitions. [2022-12-12 15:04:10,237 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 459 transitions, 7583 flow [2022-12-12 15:04:10,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-12 15:04:10,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-12 15:04:10,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 57 transitions. [2022-12-12 15:04:10,238 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.23076923076923078 [2022-12-12 15:04:10,238 INFO L175 Difference]: Start difference. First operand has 289 places, 420 transitions, 6116 flow. Second operand 13 states and 57 transitions. [2022-12-12 15:04:10,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 459 transitions, 7583 flow [2022-12-12 15:04:10,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 459 transitions, 7355 flow, removed 5 selfloop flow, removed 8 redundant places. [2022-12-12 15:04:10,878 INFO L231 Difference]: Finished difference. Result has 292 places, 430 transitions, 6275 flow [2022-12-12 15:04:10,878 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=5892, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6275, PETRI_PLACES=292, PETRI_TRANSITIONS=430} [2022-12-12 15:04:10,878 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 271 predicate places. [2022-12-12 15:04:10,879 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 430 transitions, 6275 flow [2022-12-12 15:04:10,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 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 15:04:10,879 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:04:10,879 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:04:10,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-12-12 15:04:11,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-12 15:04:11,084 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:04:11,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:04:11,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1039265067, now seen corresponding path program 9 times [2022-12-12 15:04:11,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:04:11,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117469145] [2022-12-12 15:04:11,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:04:11,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:04:11,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:04:11,688 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:04:11,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:04:11,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117469145] [2022-12-12 15:04:11,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117469145] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:04:11,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088250649] [2022-12-12 15:04:11,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 15:04:11,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:04:11,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:04:11,712 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:04:11,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-12 15:04:11,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 15:04:11,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:04:11,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-12 15:04:11,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:04:12,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 15:04:12,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 15:04:12,111 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:04:12,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:04:12,208 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1530 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1530))) (let ((.cse0 (select .cse2 ~B~0.base))) (or (not (let ((.cse1 (* c_~i_BA~0 4))) (= (select .cse0 (+ .cse1 ~B~0.offset 4)) (select (select .cse2 c_~A~0.base) (+ c_~A~0.offset .cse1 4))))) (= (select .cse0 (+ ~B~0.offset (* c_~i_AB~0 4))) |c_thread1Thread1of1ForFork1_#t~mem1|))))) is different from false [2022-12-12 15:04:12,248 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:04:12,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 186 [2022-12-12 15:04:12,271 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:04:12,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 93 [2022-12-12 15:04:12,932 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:04:12,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088250649] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:04:12,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:04:12,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 25 [2022-12-12 15:04:12,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778436003] [2022-12-12 15:04:12,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:04:12,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-12 15:04:12,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:04:12,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-12 15:04:12,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=523, Unknown=1, NotChecked=46, Total=650 [2022-12-12 15:04:12,935 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:04:12,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 430 transitions, 6275 flow. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 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 15:04:12,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:04:12,935 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:04:12,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:04:19,779 WARN L233 SmtUtils]: Spent 6.16s on a formula simplification. DAG size of input: 42 DAG size of output: 30 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 15:04:20,962 INFO L130 PetriNetUnfolder]: 2192/4168 cut-off events. [2022-12-12 15:04:20,963 INFO L131 PetriNetUnfolder]: For 287042/287042 co-relation queries the response was YES. [2022-12-12 15:04:20,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41647 conditions, 4168 events. 2192/4168 cut-off events. For 287042/287042 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 28392 event pairs, 479 based on Foata normal form. 4/4172 useless extension candidates. Maximal degree in co-relation 41509. Up to 3375 conditions per place. [2022-12-12 15:04:21,005 INFO L137 encePairwiseOnDemand]: 13/19 looper letters, 345 selfloop transitions, 130 changer transitions 3/478 dead transitions. [2022-12-12 15:04:21,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 478 transitions, 7985 flow [2022-12-12 15:04:21,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-12 15:04:21,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-12 15:04:21,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 79 transitions. [2022-12-12 15:04:21,006 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.29699248120300753 [2022-12-12 15:04:21,006 INFO L175 Difference]: Start difference. First operand has 292 places, 430 transitions, 6275 flow. Second operand 14 states and 79 transitions. [2022-12-12 15:04:21,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 478 transitions, 7985 flow [2022-12-12 15:04:21,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 478 transitions, 7797 flow, removed 36 selfloop flow, removed 11 redundant places. [2022-12-12 15:04:21,607 INFO L231 Difference]: Finished difference. Result has 296 places, 433 transitions, 6489 flow [2022-12-12 15:04:21,608 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=6099, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6489, PETRI_PLACES=296, PETRI_TRANSITIONS=433} [2022-12-12 15:04:21,608 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 275 predicate places. [2022-12-12 15:04:21,608 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 433 transitions, 6489 flow [2022-12-12 15:04:21,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 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 15:04:21,608 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:04:21,608 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:04:21,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-12-12 15:04:21,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-12 15:04:21,813 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:04:21,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:04:21,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1680875443, now seen corresponding path program 10 times [2022-12-12 15:04:21,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:04:21,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572655356] [2022-12-12 15:04:21,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:04:21,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:04:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:04:22,142 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:04:22,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:04:22,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572655356] [2022-12-12 15:04:22,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572655356] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:04:22,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717721834] [2022-12-12 15:04:22,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 15:04:22,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:04:22,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:04:22,145 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:04:22,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-12 15:04:22,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 15:04:22,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:04:22,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-12 15:04:22,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:04:22,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 15:04:22,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 15:04:22,589 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:04:22,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:04:22,715 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1577 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1577))) (let ((.cse0 (select .cse1 ~B~0.base))) (or (= (select .cse0 (+ ~B~0.offset (* c_~i_AB~0 4))) |c_thread1Thread1of1ForFork1_#t~mem1|) (not (let ((.cse2 (* c_~i_BA~0 4))) (= (select (select .cse1 c_~A~0.base) (+ c_~A~0.offset .cse2 4)) (select .cse0 (+ .cse2 ~B~0.offset 4))))))))) is different from false [2022-12-12 15:04:22,756 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:04:22,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 186 [2022-12-12 15:04:22,779 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:04:22,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 93 [2022-12-12 15:04:23,310 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:04:23,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717721834] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:04:23,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:04:23,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 23 [2022-12-12 15:04:23,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021789601] [2022-12-12 15:04:23,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:04:23,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-12 15:04:23,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:04:23,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-12 15:04:23,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=439, Unknown=1, NotChecked=42, Total=552 [2022-12-12 15:04:23,312 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:04:23,312 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 433 transitions, 6489 flow. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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 15:04:23,312 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:04:23,312 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:04:23,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:04:29,439 WARN L233 SmtUtils]: Spent 5.54s on a formula simplification. DAG size of input: 42 DAG size of output: 30 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 15:04:30,665 INFO L130 PetriNetUnfolder]: 2223/4215 cut-off events. [2022-12-12 15:04:30,665 INFO L131 PetriNetUnfolder]: For 285168/285168 co-relation queries the response was YES. [2022-12-12 15:04:30,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42069 conditions, 4215 events. 2223/4215 cut-off events. For 285168/285168 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 28669 event pairs, 469 based on Foata normal form. 8/4223 useless extension candidates. Maximal degree in co-relation 41932. Up to 3485 conditions per place. [2022-12-12 15:04:30,713 INFO L137 encePairwiseOnDemand]: 11/19 looper letters, 342 selfloop transitions, 145 changer transitions 11/498 dead transitions. [2022-12-12 15:04:30,713 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 498 transitions, 8510 flow [2022-12-12 15:04:30,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-12 15:04:30,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-12 15:04:30,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 82 transitions. [2022-12-12 15:04:30,714 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3082706766917293 [2022-12-12 15:04:30,714 INFO L175 Difference]: Start difference. First operand has 296 places, 433 transitions, 6489 flow. Second operand 14 states and 82 transitions. [2022-12-12 15:04:30,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 498 transitions, 8510 flow [2022-12-12 15:04:31,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 498 transitions, 8172 flow, removed 35 selfloop flow, removed 10 redundant places. [2022-12-12 15:04:31,434 INFO L231 Difference]: Finished difference. Result has 301 places, 464 transitions, 7178 flow [2022-12-12 15:04:31,434 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=6209, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7178, PETRI_PLACES=301, PETRI_TRANSITIONS=464} [2022-12-12 15:04:31,434 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 280 predicate places. [2022-12-12 15:04:31,434 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 464 transitions, 7178 flow [2022-12-12 15:04:31,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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 15:04:31,435 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:04:31,435 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:04:31,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-12-12 15:04:31,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-12-12 15:04:31,640 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:04:31,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:04:31,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1425668542, now seen corresponding path program 16 times [2022-12-12 15:04:31,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:04:31,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544268697] [2022-12-12 15:04:31,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:04:31,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:04:31,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:04:32,342 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:04:32,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:04:32,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544268697] [2022-12-12 15:04:32,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544268697] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:04:32,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983993362] [2022-12-12 15:04:32,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 15:04:32,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:04:32,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:04:32,343 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:04:32,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-12 15:04:32,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 15:04:32,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:04:32,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-12 15:04:32,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:04:32,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 15:04:32,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 15:04:32,770 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-12 15:04:32,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 27 [2022-12-12 15:04:32,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:04:32,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:04:33,199 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:04:33,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 179 treesize of output 306 [2022-12-12 15:04:33,217 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:04:33,217 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 95 treesize of output 76 [2022-12-12 15:04:34,038 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:04:34,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983993362] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:04:34,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:04:34,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 29 [2022-12-12 15:04:34,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405557503] [2022-12-12 15:04:34,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:04:34,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-12 15:04:34,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:04:34,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-12 15:04:34,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=780, Unknown=6, NotChecked=0, Total=870 [2022-12-12 15:04:34,041 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:04:34,041 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 464 transitions, 7178 flow. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 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 15:04:34,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:04:34,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:04:34,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:04:36,313 INFO L130 PetriNetUnfolder]: 2189/4133 cut-off events. [2022-12-12 15:04:36,313 INFO L131 PetriNetUnfolder]: For 301484/301484 co-relation queries the response was YES. [2022-12-12 15:04:36,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42155 conditions, 4133 events. 2189/4133 cut-off events. For 301484/301484 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 27906 event pairs, 230 based on Foata normal form. 50/4183 useless extension candidates. Maximal degree in co-relation 42016. Up to 2047 conditions per place. [2022-12-12 15:04:36,360 INFO L137 encePairwiseOnDemand]: 9/19 looper letters, 319 selfloop transitions, 215 changer transitions 4/538 dead transitions. [2022-12-12 15:04:36,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 538 transitions, 9374 flow [2022-12-12 15:04:36,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-12 15:04:36,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-12 15:04:36,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 98 transitions. [2022-12-12 15:04:36,361 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.28654970760233917 [2022-12-12 15:04:36,362 INFO L175 Difference]: Start difference. First operand has 301 places, 464 transitions, 7178 flow. Second operand 18 states and 98 transitions. [2022-12-12 15:04:36,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 538 transitions, 9374 flow [2022-12-12 15:04:37,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 538 transitions, 9006 flow, removed 66 selfloop flow, removed 12 redundant places. [2022-12-12 15:04:37,122 INFO L231 Difference]: Finished difference. Result has 306 places, 465 transitions, 7325 flow [2022-12-12 15:04:37,122 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=6822, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=7325, PETRI_PLACES=306, PETRI_TRANSITIONS=465} [2022-12-12 15:04:37,123 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 285 predicate places. [2022-12-12 15:04:37,123 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 465 transitions, 7325 flow [2022-12-12 15:04:37,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 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 15:04:37,123 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:04:37,123 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:04:37,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-12-12 15:04:37,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:04:37,328 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:04:37,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:04:37,328 INFO L85 PathProgramCache]: Analyzing trace with hash 324820398, now seen corresponding path program 17 times [2022-12-12 15:04:37,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:04:37,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900566233] [2022-12-12 15:04:37,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:04:37,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:04:37,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:04:37,880 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:04:37,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:04:37,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900566233] [2022-12-12 15:04:37,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900566233] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:04:37,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263305723] [2022-12-12 15:04:37,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 15:04:37,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:04:37,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:04:37,882 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:04:37,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-12 15:04:37,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-12 15:04:37,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:04:37,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-12 15:04:37,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:04:38,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 15:04:38,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 15:04:38,354 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:04:38,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:04:38,570 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_~B~0.offset (* c_~i_AB~0 4)))) (let ((.cse1 (forall ((v_ArrVal_1671 (Array Int Int)) (~B~0.base Int)) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1671) ~B~0.base) .cse3))))) (.cse0 (+ c_~i_BA~0 1))) (and (or (< .cse0 c_~An~0) .cse1) (forall ((v_ArrVal_1671 (Array Int Int)) (~B~0.base Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1671))) (let ((.cse2 (select .cse4 ~B~0.base))) (or (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select .cse2 .cse3))) (let ((.cse5 (* c_~i_BA~0 4))) (= (select (select .cse4 c_~A~0.base) (+ c_~A~0.offset .cse5 4)) (select .cse2 (+ .cse5 4 c_~B~0.offset)))))))) (or .cse1 (< .cse0 c_~Bn~0))))) is different from false [2022-12-12 15:04:38,751 INFO L321 Elim1Store]: treesize reduction 34, result has 83.9 percent of original size [2022-12-12 15:04:38,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 263 treesize of output 332 [2022-12-12 15:04:38,780 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:04:38,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 155 treesize of output 161 [2022-12-12 15:04:38,790 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 121 treesize of output 115 [2022-12-12 15:04:38,798 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 115 treesize of output 109 [2022-12-12 15:04:40,662 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:04:40,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263305723] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:04:40,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:04:40,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 8] total 28 [2022-12-12 15:04:40,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958141205] [2022-12-12 15:04:40,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:04:40,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-12 15:04:40,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:04:40,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-12 15:04:40,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=679, Unknown=1, NotChecked=52, Total=812 [2022-12-12 15:04:40,663 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:04:40,664 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 465 transitions, 7325 flow. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 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 15:04:40,664 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:04:40,664 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:04:40,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:04:47,545 INFO L130 PetriNetUnfolder]: 2168/4079 cut-off events. [2022-12-12 15:04:47,546 INFO L131 PetriNetUnfolder]: For 287067/287067 co-relation queries the response was YES. [2022-12-12 15:04:47,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42218 conditions, 4079 events. 2168/4079 cut-off events. For 287067/287067 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 27300 event pairs, 465 based on Foata normal form. 12/4091 useless extension candidates. Maximal degree in co-relation 42079. Up to 3410 conditions per place. [2022-12-12 15:04:47,591 INFO L137 encePairwiseOnDemand]: 9/19 looper letters, 336 selfloop transitions, 145 changer transitions 10/491 dead transitions. [2022-12-12 15:04:47,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 491 transitions, 8569 flow [2022-12-12 15:04:47,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-12 15:04:47,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-12 15:04:47,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 82 transitions. [2022-12-12 15:04:47,592 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.22714681440443213 [2022-12-12 15:04:47,592 INFO L175 Difference]: Start difference. First operand has 306 places, 465 transitions, 7325 flow. Second operand 19 states and 82 transitions. [2022-12-12 15:04:47,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 491 transitions, 8569 flow [2022-12-12 15:04:48,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 491 transitions, 8125 flow, removed 30 selfloop flow, removed 16 redundant places. [2022-12-12 15:04:48,231 INFO L231 Difference]: Finished difference. Result has 309 places, 459 transitions, 7102 flow [2022-12-12 15:04:48,232 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=6777, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7102, PETRI_PLACES=309, PETRI_TRANSITIONS=459} [2022-12-12 15:04:48,232 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 288 predicate places. [2022-12-12 15:04:48,232 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 459 transitions, 7102 flow [2022-12-12 15:04:48,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 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 15:04:48,232 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:04:48,232 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:04:48,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-12-12 15:04:48,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-12-12 15:04:48,437 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:04:48,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:04:48,437 INFO L85 PathProgramCache]: Analyzing trace with hash 2098575364, now seen corresponding path program 18 times [2022-12-12 15:04:48,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:04:48,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097508843] [2022-12-12 15:04:48,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:04:48,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:04:48,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:04:49,083 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:04:49,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:04:49,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097508843] [2022-12-12 15:04:49,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097508843] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:04:49,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018085750] [2022-12-12 15:04:49,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 15:04:49,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:04:49,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:04:49,085 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:04:49,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-12 15:04:49,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-12 15:04:49,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:04:49,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-12 15:04:49,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:04:49,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 15:04:49,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 15:04:49,531 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:04:49,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:04:49,760 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (* c_~i_AB~0 4))) (let ((.cse0 (+ c_~i_BA~0 1)) (.cse1 (forall ((~B~0.offset Int) (~B~0.base Int) (v_ArrVal_1718 (Array Int Int))) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1718) ~B~0.base) (+ ~B~0.offset .cse3))))))) (and (or (< .cse0 c_~Bn~0) .cse1) (forall ((~B~0.offset Int) (~B~0.base Int) (v_ArrVal_1718 (Array Int Int))) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1718))) (let ((.cse2 (select .cse5 ~B~0.base))) (or (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select .cse2 (+ ~B~0.offset .cse3)))) (let ((.cse4 (* c_~i_BA~0 4))) (= (select .cse2 (+ .cse4 ~B~0.offset 4)) (select (select .cse5 c_~A~0.base) (+ c_~A~0.offset .cse4 4)))))))) (or (< .cse0 c_~An~0) .cse1)))) is different from false [2022-12-12 15:04:49,864 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:04:49,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 263 treesize of output 381 [2022-12-12 15:04:49,896 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:04:49,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 155 treesize of output 161 [2022-12-12 15:04:49,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 115 [2022-12-12 15:04:49,915 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 115 treesize of output 109 [2022-12-12 15:04:51,369 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:04:51,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018085750] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:04:51,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:04:51,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 27 [2022-12-12 15:04:51,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549366542] [2022-12-12 15:04:51,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:04:51,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-12 15:04:51,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:04:51,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-12 15:04:51,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=626, Unknown=1, NotChecked=50, Total=756 [2022-12-12 15:04:51,371 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:04:51,371 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 459 transitions, 7102 flow. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 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 15:04:51,371 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:04:51,371 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:04:51,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:04:59,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:05:01,528 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_~i_AB~0 4)) (.cse12 (+ c_~i_BA~0 1)) (.cse4 (* c_~i_BA~0 4))) (let ((.cse2 (select |c_#memory_int| c_~A~0.base)) (.cse3 (+ c_~A~0.offset .cse4 4)) (.cse8 (< .cse12 c_~An~0)) (.cse7 (forall ((~B~0.offset Int) (~B~0.base Int) (v_ArrVal_1718 (Array Int Int))) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1718) ~B~0.base) (+ ~B~0.offset .cse1)))))) (.cse6 (< .cse12 c_~Bn~0)) (.cse9 (forall ((~B~0.offset Int) (~B~0.base Int)) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select (select |c_#memory_int| ~B~0.base) (+ ~B~0.offset .cse1)))))) (.cse5 (+ c_~A~0.offset .cse4))) (and (forall ((~B~0.offset Int) (~B~0.base Int)) (let ((.cse0 (select |c_#memory_int| ~B~0.base))) (or (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select .cse0 (+ ~B~0.offset .cse1)))) (= (select .cse2 .cse3) (select .cse0 (+ .cse4 ~B~0.offset 4)))))) (not (= |c_ULTIMATE.start_main_~#t2~0#1.base| c_~A~0.base)) (not (<= .cse5 3)) (= (+ .cse4 4) .cse1) (or .cse6 .cse7) (= (select .cse2 .cse5) (select (select |c_#memory_int| c_~B~0.base) (+ .cse4 c_~B~0.offset))) (= c_~B~0.offset 0) (or .cse8 .cse9) (forall ((~B~0.offset Int) (~B~0.base Int) (v_ArrVal_1718 (Array Int Int))) (let ((.cse11 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1718))) (let ((.cse10 (select .cse11 ~B~0.base))) (or (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select .cse10 (+ ~B~0.offset .cse1)))) (= (select .cse10 (+ .cse4 ~B~0.offset 4)) (select (select .cse11 c_~A~0.base) .cse3)))))) (<= .cse12 c_~An~0) (= c_~A~0.offset 0) (or .cse8 .cse7) (<= .cse12 c_~Bn~0) (or .cse6 .cse9) (<= .cse5 4)))) is different from false [2022-12-12 15:05:08,487 WARN L233 SmtUtils]: Spent 6.86s on a formula simplification. DAG size of input: 61 DAG size of output: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 15:05:10,504 INFO L130 PetriNetUnfolder]: 2347/4435 cut-off events. [2022-12-12 15:05:10,504 INFO L131 PetriNetUnfolder]: For 327324/327324 co-relation queries the response was YES. [2022-12-12 15:05:10,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44439 conditions, 4435 events. 2347/4435 cut-off events. For 327324/327324 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 30092 event pairs, 441 based on Foata normal form. 117/4552 useless extension candidates. Maximal degree in co-relation 44300. Up to 3638 conditions per place. [2022-12-12 15:05:10,555 INFO L137 encePairwiseOnDemand]: 6/19 looper letters, 391 selfloop transitions, 202 changer transitions 12/605 dead transitions. [2022-12-12 15:05:10,555 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 605 transitions, 10684 flow [2022-12-12 15:05:10,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-12 15:05:10,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-12 15:05:10,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 121 transitions. [2022-12-12 15:05:10,556 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.23586744639376217 [2022-12-12 15:05:10,556 INFO L175 Difference]: Start difference. First operand has 309 places, 459 transitions, 7102 flow. Second operand 27 states and 121 transitions. [2022-12-12 15:05:10,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 605 transitions, 10684 flow [2022-12-12 15:05:11,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 605 transitions, 10129 flow, removed 2 selfloop flow, removed 20 redundant places. [2022-12-12 15:05:11,239 INFO L231 Difference]: Finished difference. Result has 323 places, 544 transitions, 9032 flow [2022-12-12 15:05:11,240 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=6719, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=9032, PETRI_PLACES=323, PETRI_TRANSITIONS=544} [2022-12-12 15:05:11,240 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 302 predicate places. [2022-12-12 15:05:11,240 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 544 transitions, 9032 flow [2022-12-12 15:05:11,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 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 15:05:11,240 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:05:11,240 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:05:11,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-12-12 15:05:11,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:05:11,445 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:05:11,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:05:11,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1479014292, now seen corresponding path program 19 times [2022-12-12 15:05:11,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:05:11,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827383964] [2022-12-12 15:05:11,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:05:11,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:05:11,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:05:11,597 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:05:11,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:05:11,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827383964] [2022-12-12 15:05:11,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827383964] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:05:11,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685802336] [2022-12-12 15:05:11,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 15:05:11,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:05:11,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:05:11,599 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:05:11,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-12 15:05:11,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:05:11,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-12 15:05:11,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:05:11,829 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:05:11,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:05:11,922 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:05:11,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685802336] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:05:11,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:05:11,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 3] total 8 [2022-12-12 15:05:11,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921021990] [2022-12-12 15:05:11,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:05:11,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-12 15:05:11,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:05:11,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-12 15:05:11,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-12-12 15:05:11,923 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:05:11,923 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 544 transitions, 9032 flow. Second operand has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 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 15:05:11,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:05:11,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:05:11,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:05:13,578 INFO L130 PetriNetUnfolder]: 3631/6839 cut-off events. [2022-12-12 15:05:13,578 INFO L131 PetriNetUnfolder]: For 532919/532919 co-relation queries the response was YES. [2022-12-12 15:05:13,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73702 conditions, 6839 events. 3631/6839 cut-off events. For 532919/532919 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 49930 event pairs, 477 based on Foata normal form. 8/6847 useless extension candidates. Maximal degree in co-relation 73555. Up to 3601 conditions per place. [2022-12-12 15:05:13,668 INFO L137 encePairwiseOnDemand]: 15/19 looper letters, 432 selfloop transitions, 310 changer transitions 3/745 dead transitions. [2022-12-12 15:05:13,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 745 transitions, 13753 flow [2022-12-12 15:05:13,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-12 15:05:13,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-12 15:05:13,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 93 transitions. [2022-12-12 15:05:13,669 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.48947368421052634 [2022-12-12 15:05:13,669 INFO L175 Difference]: Start difference. First operand has 323 places, 544 transitions, 9032 flow. Second operand 10 states and 93 transitions. [2022-12-12 15:05:13,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 745 transitions, 13753 flow [2022-12-12 15:05:15,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 745 transitions, 13528 flow, removed 46 selfloop flow, removed 14 redundant places. [2022-12-12 15:05:15,157 INFO L231 Difference]: Finished difference. Result has 324 places, 672 transitions, 12037 flow [2022-12-12 15:05:15,158 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=8829, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12037, PETRI_PLACES=324, PETRI_TRANSITIONS=672} [2022-12-12 15:05:15,158 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 303 predicate places. [2022-12-12 15:05:15,158 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 672 transitions, 12037 flow [2022-12-12 15:05:15,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 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 15:05:15,158 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:05:15,158 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:05:15,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-12-12 15:05:15,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-12-12 15:05:15,362 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:05:15,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:05:15,363 INFO L85 PathProgramCache]: Analyzing trace with hash 435462142, now seen corresponding path program 20 times [2022-12-12 15:05:15,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:05:15,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448550767] [2022-12-12 15:05:15,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:05:15,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:05:15,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:05:15,458 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:05:15,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:05:15,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448550767] [2022-12-12 15:05:15,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448550767] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:05:15,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570487414] [2022-12-12 15:05:15,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 15:05:15,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:05:15,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:05:15,460 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:05:15,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-12 15:05:15,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 15:05:15,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:05:15,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-12 15:05:15,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:05:15,703 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:05:15,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:05:15,781 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-12 15:05:15,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570487414] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:05:15,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:05:15,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 3] total 8 [2022-12-12 15:05:15,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480930977] [2022-12-12 15:05:15,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:05:15,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-12 15:05:15,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:05:15,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-12 15:05:15,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-12-12 15:05:15,782 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:05:15,782 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 672 transitions, 12037 flow. Second operand has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 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 15:05:15,782 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:05:15,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:05:15,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:05:18,202 INFO L130 PetriNetUnfolder]: 4258/8033 cut-off events. [2022-12-12 15:05:18,202 INFO L131 PetriNetUnfolder]: For 675867/675867 co-relation queries the response was YES. [2022-12-12 15:05:18,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91842 conditions, 8033 events. 4258/8033 cut-off events. For 675867/675867 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 60900 event pairs, 801 based on Foata normal form. 23/8056 useless extension candidates. Maximal degree in co-relation 91691. Up to 5728 conditions per place. [2022-12-12 15:05:18,298 INFO L137 encePairwiseOnDemand]: 15/19 looper letters, 489 selfloop transitions, 319 changer transitions 4/812 dead transitions. [2022-12-12 15:05:18,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 812 transitions, 15936 flow [2022-12-12 15:05:18,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-12 15:05:18,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-12 15:05:18,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 84 transitions. [2022-12-12 15:05:18,299 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4421052631578947 [2022-12-12 15:05:18,299 INFO L175 Difference]: Start difference. First operand has 324 places, 672 transitions, 12037 flow. Second operand 10 states and 84 transitions. [2022-12-12 15:05:18,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 812 transitions, 15936 flow [2022-12-12 15:05:20,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 812 transitions, 15478 flow, removed 160 selfloop flow, removed 3 redundant places. [2022-12-12 15:05:20,116 INFO L231 Difference]: Finished difference. Result has 335 places, 748 transitions, 13932 flow [2022-12-12 15:05:20,117 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=11583, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13932, PETRI_PLACES=335, PETRI_TRANSITIONS=748} [2022-12-12 15:05:20,117 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 314 predicate places. [2022-12-12 15:05:20,117 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 748 transitions, 13932 flow [2022-12-12 15:05:20,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 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 15:05:20,117 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:05:20,117 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:05:20,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-12-12 15:05:20,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-12-12 15:05:20,322 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:05:20,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:05:20,322 INFO L85 PathProgramCache]: Analyzing trace with hash -426971524, now seen corresponding path program 21 times [2022-12-12 15:05:20,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:05:20,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736771510] [2022-12-12 15:05:20,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:05:20,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:05:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:05:20,413 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:05:20,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:05:20,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736771510] [2022-12-12 15:05:20,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736771510] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:05:20,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944436102] [2022-12-12 15:05:20,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 15:05:20,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:05:20,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:05:20,415 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:05:20,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-12 15:05:20,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-12 15:05:20,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:05:20,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-12 15:05:20,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:05:20,906 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:05:20,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:05:21,511 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:05:21,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944436102] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:05:21,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:05:21,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 11, 11] total 25 [2022-12-12 15:05:21,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294887370] [2022-12-12 15:05:21,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:05:21,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-12 15:05:21,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:05:21,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-12 15:05:21,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-12-12 15:05:21,513 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:05:21,513 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 748 transitions, 13932 flow. Second operand has 27 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 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 15:05:21,513 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:05:21,513 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:05:21,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:05:25,175 INFO L130 PetriNetUnfolder]: 4795/9025 cut-off events. [2022-12-12 15:05:25,175 INFO L131 PetriNetUnfolder]: For 819074/819074 co-relation queries the response was YES. [2022-12-12 15:05:25,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108009 conditions, 9025 events. 4795/9025 cut-off events. For 819074/819074 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 70028 event pairs, 714 based on Foata normal form. 81/9106 useless extension candidates. Maximal degree in co-relation 107853. Up to 3949 conditions per place. [2022-12-12 15:05:25,286 INFO L137 encePairwiseOnDemand]: 10/19 looper letters, 605 selfloop transitions, 356 changer transitions 5/966 dead transitions. [2022-12-12 15:05:25,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 966 transitions, 20102 flow [2022-12-12 15:05:25,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-12 15:05:25,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-12 15:05:25,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 120 transitions. [2022-12-12 15:05:25,287 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3508771929824561 [2022-12-12 15:05:25,287 INFO L175 Difference]: Start difference. First operand has 335 places, 748 transitions, 13932 flow. Second operand 18 states and 120 transitions. [2022-12-12 15:05:25,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 966 transitions, 20102 flow [2022-12-12 15:05:27,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 966 transitions, 19757 flow, removed 126 selfloop flow, removed 4 redundant places. [2022-12-12 15:05:27,502 INFO L231 Difference]: Finished difference. Result has 356 places, 804 transitions, 16155 flow [2022-12-12 15:05:27,502 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=13596, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=297, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=16155, PETRI_PLACES=356, PETRI_TRANSITIONS=804} [2022-12-12 15:05:27,503 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 335 predicate places. [2022-12-12 15:05:27,503 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 804 transitions, 16155 flow [2022-12-12 15:05:27,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 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 15:05:27,503 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:05:27,503 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:05:27,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-12-12 15:05:27,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-12-12 15:05:27,708 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:05:27,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:05:27,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1642574212, now seen corresponding path program 11 times [2022-12-12 15:05:27,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:05:27,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060072526] [2022-12-12 15:05:27,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:05:27,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:05:27,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:05:27,798 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 15:05:27,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:05:27,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060072526] [2022-12-12 15:05:27,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060072526] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:05:27,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870471685] [2022-12-12 15:05:27,798 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 15:05:27,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:05:27,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:05:27,799 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:05:27,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-12 15:05:27,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-12 15:05:27,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:05:27,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-12 15:05:27,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:05:28,065 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 15:05:28,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:05:28,172 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 15:05:28,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870471685] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:05:28,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:05:28,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2022-12-12 15:05:28,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566765683] [2022-12-12 15:05:28,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:05:28,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-12 15:05:28,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:05:28,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-12 15:05:28,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2022-12-12 15:05:28,173 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:05:28,173 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 804 transitions, 16155 flow. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 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 15:05:28,173 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:05:28,173 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:05:28,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:05:31,102 INFO L130 PetriNetUnfolder]: 3860/7535 cut-off events. [2022-12-12 15:05:31,103 INFO L131 PetriNetUnfolder]: For 745531/745531 co-relation queries the response was YES. [2022-12-12 15:05:31,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101375 conditions, 7535 events. 3860/7535 cut-off events. For 745531/745531 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 58125 event pairs, 1497 based on Foata normal form. 538/8073 useless extension candidates. Maximal degree in co-relation 100986. Up to 3864 conditions per place. [2022-12-12 15:05:31,204 INFO L137 encePairwiseOnDemand]: 12/19 looper letters, 594 selfloop transitions, 105 changer transitions 143/842 dead transitions. [2022-12-12 15:05:31,204 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 842 transitions, 18775 flow [2022-12-12 15:05:31,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-12 15:05:31,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-12 15:05:31,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 111 transitions. [2022-12-12 15:05:31,205 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2781954887218045 [2022-12-12 15:05:31,205 INFO L175 Difference]: Start difference. First operand has 356 places, 804 transitions, 16155 flow. Second operand 21 states and 111 transitions. [2022-12-12 15:05:31,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 842 transitions, 18775 flow [2022-12-12 15:05:33,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 842 transitions, 17046 flow, removed 737 selfloop flow, removed 30 redundant places. [2022-12-12 15:05:33,469 INFO L231 Difference]: Finished difference. Result has 325 places, 457 transitions, 9465 flow [2022-12-12 15:05:33,469 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=7777, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=9465, PETRI_PLACES=325, PETRI_TRANSITIONS=457} [2022-12-12 15:05:33,469 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 304 predicate places. [2022-12-12 15:05:33,469 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 457 transitions, 9465 flow [2022-12-12 15:05:33,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 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 15:05:33,469 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:05:33,470 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:05:33,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-12-12 15:05:33,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-12-12 15:05:33,674 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:05:33,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:05:33,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1390567768, now seen corresponding path program 22 times [2022-12-12 15:05:33,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:05:33,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284581629] [2022-12-12 15:05:33,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:05:33,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:05:33,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:05:33,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-12 15:05:33,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:05:33,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284581629] [2022-12-12 15:05:33,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284581629] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:05:33,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474674291] [2022-12-12 15:05:33,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 15:05:33,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:05:33,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:05:33,774 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:05:33,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-12 15:05:33,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 15:05:33,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:05:33,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-12 15:05:33,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:05:34,021 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:05:34,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:05:34,126 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:05:34,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474674291] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:05:34,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:05:34,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-12-12 15:05:34,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335216759] [2022-12-12 15:05:34,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:05:34,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 15:05:34,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:05:34,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 15:05:34,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-12-12 15:05:34,127 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:05:34,127 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 457 transitions, 9465 flow. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 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 15:05:34,127 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:05:34,127 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:05:34,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:05:37,006 INFO L130 PetriNetUnfolder]: 3808/7462 cut-off events. [2022-12-12 15:05:37,006 INFO L131 PetriNetUnfolder]: For 621815/621815 co-relation queries the response was YES. [2022-12-12 15:05:37,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94415 conditions, 7462 events. 3808/7462 cut-off events. For 621815/621815 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 56859 event pairs, 189 based on Foata normal form. 218/7680 useless extension candidates. Maximal degree in co-relation 94052. Up to 2303 conditions per place. [2022-12-12 15:05:37,106 INFO L137 encePairwiseOnDemand]: 13/19 looper letters, 316 selfloop transitions, 332 changer transitions 212/860 dead transitions. [2022-12-12 15:05:37,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 860 transitions, 18609 flow [2022-12-12 15:05:37,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-12 15:05:37,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-12 15:05:37,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 227 transitions. [2022-12-12 15:05:37,107 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.37335526315789475 [2022-12-12 15:05:37,107 INFO L175 Difference]: Start difference. First operand has 325 places, 457 transitions, 9465 flow. Second operand 32 states and 227 transitions. [2022-12-12 15:05:37,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 860 transitions, 18609 flow [2022-12-12 15:05:38,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 860 transitions, 17876 flow, removed 327 selfloop flow, removed 17 redundant places. [2022-12-12 15:05:38,542 INFO L231 Difference]: Finished difference. Result has 340 places, 484 transitions, 10620 flow [2022-12-12 15:05:38,542 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=8738, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=10620, PETRI_PLACES=340, PETRI_TRANSITIONS=484} [2022-12-12 15:05:38,543 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 319 predicate places. [2022-12-12 15:05:38,543 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 484 transitions, 10620 flow [2022-12-12 15:05:38,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 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 15:05:38,543 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:05:38,543 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:05:38,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-12-12 15:05:38,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-12-12 15:05:38,748 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:05:38,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:05:38,748 INFO L85 PathProgramCache]: Analyzing trace with hash 2003540062, now seen corresponding path program 23 times [2022-12-12 15:05:38,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:05:38,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868279596] [2022-12-12 15:05:38,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:05:38,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:05:38,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:05:38,845 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-12 15:05:38,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:05:38,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868279596] [2022-12-12 15:05:38,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868279596] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:05:38,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978493788] [2022-12-12 15:05:38,845 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 15:05:38,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:05:38,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:05:38,847 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:05:38,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-12-12 15:05:38,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-12 15:05:38,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:05:38,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-12 15:05:38,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:05:39,099 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-12 15:05:39,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:05:39,186 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-12 15:05:39,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978493788] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:05:39,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:05:39,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-12-12 15:05:39,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125613115] [2022-12-12 15:05:39,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:05:39,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 15:05:39,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:05:39,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 15:05:39,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2022-12-12 15:05:39,187 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:05:39,187 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 484 transitions, 10620 flow. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 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 15:05:39,187 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:05:39,187 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:05:39,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:05:41,012 INFO L130 PetriNetUnfolder]: 2950/5696 cut-off events. [2022-12-12 15:05:41,012 INFO L131 PetriNetUnfolder]: For 393310/393310 co-relation queries the response was YES. [2022-12-12 15:05:41,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70313 conditions, 5696 events. 2950/5696 cut-off events. For 393310/393310 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 41730 event pairs, 793 based on Foata normal form. 46/5742 useless extension candidates. Maximal degree in co-relation 70154. Up to 4920 conditions per place. [2022-12-12 15:05:41,081 INFO L137 encePairwiseOnDemand]: 14/19 looper letters, 384 selfloop transitions, 31 changer transitions 97/512 dead transitions. [2022-12-12 15:05:41,081 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 512 transitions, 11855 flow [2022-12-12 15:05:41,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-12 15:05:41,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-12 15:05:41,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 58 transitions. [2022-12-12 15:05:41,082 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.30526315789473685 [2022-12-12 15:05:41,082 INFO L175 Difference]: Start difference. First operand has 340 places, 484 transitions, 10620 flow. Second operand 10 states and 58 transitions. [2022-12-12 15:05:41,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 512 transitions, 11855 flow [2022-12-12 15:05:42,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 512 transitions, 11104 flow, removed 294 selfloop flow, removed 18 redundant places. [2022-12-12 15:05:42,091 INFO L231 Difference]: Finished difference. Result has 313 places, 409 transitions, 8353 flow [2022-12-12 15:05:42,092 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=9642, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8353, PETRI_PLACES=313, PETRI_TRANSITIONS=409} [2022-12-12 15:05:42,092 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 292 predicate places. [2022-12-12 15:05:42,092 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 409 transitions, 8353 flow [2022-12-12 15:05:42,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 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 15:05:42,092 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:05:42,092 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:05:42,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-12-12 15:05:42,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-12-12 15:05:42,297 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:05:42,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:05:42,298 INFO L85 PathProgramCache]: Analyzing trace with hash -249735739, now seen corresponding path program 12 times [2022-12-12 15:05:42,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:05:42,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925136010] [2022-12-12 15:05:42,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:05:42,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:05:42,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:05:42,961 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:05:42,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:05:42,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925136010] [2022-12-12 15:05:42,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925136010] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:05:42,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53001285] [2022-12-12 15:05:42,962 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 15:05:42,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:05:42,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:05:42,963 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:05:42,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-12-12 15:05:43,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-12 15:05:43,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:05:43,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-12 15:05:43,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:05:43,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 15:05:43,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 15:05:43,605 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-12 15:05:43,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:05:43,947 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse4 (* c_~i_AB~0 4))) (let ((.cse0 (forall ((~B~0.offset Int) (~B~0.base Int) (v_ArrVal_2053 (Array Int Int))) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2053) ~B~0.base) (+ ~B~0.offset .cse4))))))) (and (or (< (+ c_~i_BA~0 1) c_~Bn~0) .cse0) (or .cse0 (< c_~i_BA~0 (+ c_~i_AB~0 1))) (forall ((~B~0.offset Int) (~B~0.base Int) (v_ArrVal_2053 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2053))) (let ((.cse3 (select .cse1 ~B~0.base))) (or (let ((.cse2 (* c_~i_BA~0 4))) (= (select (select .cse1 c_~A~0.base) (+ c_~A~0.offset .cse2 4)) (select .cse3 (+ .cse2 ~B~0.offset 4)))) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select .cse3 (+ ~B~0.offset .cse4))))))))))) is different from false [2022-12-12 15:05:44,072 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:05:44,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 263 treesize of output 381 [2022-12-12 15:05:44,110 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:05:44,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 155 treesize of output 161 [2022-12-12 15:05:44,127 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 121 treesize of output 115 [2022-12-12 15:05:44,138 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 115 treesize of output 109 [2022-12-12 15:05:46,291 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-12 15:05:46,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53001285] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:05:46,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:05:46,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 30 [2022-12-12 15:05:46,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464578390] [2022-12-12 15:05:46,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:05:46,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-12 15:05:46,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:05:46,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-12 15:05:46,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=788, Unknown=1, NotChecked=56, Total=930 [2022-12-12 15:05:46,292 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:05:46,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 409 transitions, 8353 flow. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 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 15:05:46,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:05:46,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:05:46,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:06:00,962 WARN L233 SmtUtils]: Spent 8.56s on a formula simplification. DAG size of input: 62 DAG size of output: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 15:06:04,639 INFO L130 PetriNetUnfolder]: 2769/5292 cut-off events. [2022-12-12 15:06:04,639 INFO L131 PetriNetUnfolder]: For 367358/367358 co-relation queries the response was YES. [2022-12-12 15:06:04,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62976 conditions, 5292 events. 2769/5292 cut-off events. For 367358/367358 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 38154 event pairs, 694 based on Foata normal form. 64/5356 useless extension candidates. Maximal degree in co-relation 62829. Up to 4368 conditions per place. [2022-12-12 15:06:04,705 INFO L137 encePairwiseOnDemand]: 6/19 looper letters, 333 selfloop transitions, 131 changer transitions 12/476 dead transitions. [2022-12-12 15:06:04,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 476 transitions, 10146 flow [2022-12-12 15:06:04,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-12 15:06:04,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-12-12 15:06:04,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 135 transitions. [2022-12-12 15:06:04,706 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.24500907441016334 [2022-12-12 15:06:04,706 INFO L175 Difference]: Start difference. First operand has 313 places, 409 transitions, 8353 flow. Second operand 29 states and 135 transitions. [2022-12-12 15:06:04,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 476 transitions, 10146 flow [2022-12-12 15:06:05,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 476 transitions, 9889 flow, removed 77 selfloop flow, removed 18 redundant places. [2022-12-12 15:06:05,621 INFO L231 Difference]: Finished difference. Result has 309 places, 406 transitions, 8396 flow [2022-12-12 15:06:05,622 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=7999, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=8396, PETRI_PLACES=309, PETRI_TRANSITIONS=406} [2022-12-12 15:06:05,622 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 288 predicate places. [2022-12-12 15:06:05,622 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 406 transitions, 8396 flow [2022-12-12 15:06:05,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 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 15:06:05,622 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:06:05,622 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:06:05,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-12-12 15:06:05,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-12-12 15:06:05,825 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:06:05,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:06:05,825 INFO L85 PathProgramCache]: Analyzing trace with hash -2074746617, now seen corresponding path program 24 times [2022-12-12 15:06:05,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:06:05,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883041383] [2022-12-12 15:06:05,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:06:05,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:06:05,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:06:06,029 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:06:06,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:06:06,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883041383] [2022-12-12 15:06:06,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883041383] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:06:06,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370185960] [2022-12-12 15:06:06,029 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 15:06:06,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:06:06,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:06:06,031 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:06:06,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-12-12 15:06:06,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-12 15:06:06,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:06:06,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-12 15:06:06,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:06:06,472 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:06:06,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:06:06,725 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:06:06,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370185960] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:06:06,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:06:06,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 28 [2022-12-12 15:06:06,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150445295] [2022-12-12 15:06:06,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:06:06,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-12 15:06:06,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:06:06,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-12 15:06:06,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2022-12-12 15:06:06,736 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:06:06,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 406 transitions, 8396 flow. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 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 15:06:06,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:06:06,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:06:06,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:06:08,884 INFO L130 PetriNetUnfolder]: 2613/4862 cut-off events. [2022-12-12 15:06:08,885 INFO L131 PetriNetUnfolder]: For 368022/368022 co-relation queries the response was YES. [2022-12-12 15:06:08,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60228 conditions, 4862 events. 2613/4862 cut-off events. For 368022/368022 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 33179 event pairs, 167 based on Foata normal form. 80/4942 useless extension candidates. Maximal degree in co-relation 60085. Up to 1624 conditions per place. [2022-12-12 15:06:08,946 INFO L137 encePairwiseOnDemand]: 11/19 looper letters, 301 selfloop transitions, 230 changer transitions 5/536 dead transitions. [2022-12-12 15:06:08,946 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 536 transitions, 11960 flow [2022-12-12 15:06:08,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-12 15:06:08,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-12 15:06:08,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 114 transitions. [2022-12-12 15:06:08,947 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2727272727272727 [2022-12-12 15:06:08,947 INFO L175 Difference]: Start difference. First operand has 309 places, 406 transitions, 8396 flow. Second operand 22 states and 114 transitions. [2022-12-12 15:06:08,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 536 transitions, 11960 flow [2022-12-12 15:06:09,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 536 transitions, 11538 flow, removed 49 selfloop flow, removed 28 redundant places. [2022-12-12 15:06:09,803 INFO L231 Difference]: Finished difference. Result has 299 places, 410 transitions, 8850 flow [2022-12-12 15:06:09,804 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=7801, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=8850, PETRI_PLACES=299, PETRI_TRANSITIONS=410} [2022-12-12 15:06:09,804 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 278 predicate places. [2022-12-12 15:06:09,804 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 410 transitions, 8850 flow [2022-12-12 15:06:09,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 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 15:06:09,804 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:06:09,804 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:06:09,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-12-12 15:06:10,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:06:10,009 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:06:10,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:06:10,009 INFO L85 PathProgramCache]: Analyzing trace with hash 667608389, now seen corresponding path program 13 times [2022-12-12 15:06:10,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:06:10,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482614932] [2022-12-12 15:06:10,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:06:10,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:06:10,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:06:10,447 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:06:10,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:06:10,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482614932] [2022-12-12 15:06:10,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482614932] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:06:10,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820988951] [2022-12-12 15:06:10,447 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 15:06:10,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:06:10,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:06:10,448 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:06:10,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-12-12 15:06:10,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:06:10,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-12 15:06:10,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:06:10,851 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-12 15:06:10,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:06:11,053 INFO L321 Elim1Store]: treesize reduction 34, result has 62.6 percent of original size [2022-12-12 15:06:11,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 64 [2022-12-12 15:06:11,159 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-12 15:06:11,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820988951] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:06:11,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:06:11,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 8] total 27 [2022-12-12 15:06:11,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981706306] [2022-12-12 15:06:11,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:06:11,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-12 15:06:11,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:06:11,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-12 15:06:11,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-12-12 15:06:11,160 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:06:11,160 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 410 transitions, 8850 flow. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 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 15:06:11,160 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:06:11,160 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:06:11,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:06:13,400 INFO L130 PetriNetUnfolder]: 2645/4946 cut-off events. [2022-12-12 15:06:13,400 INFO L131 PetriNetUnfolder]: For 356763/356763 co-relation queries the response was YES. [2022-12-12 15:06:13,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61369 conditions, 4946 events. 2645/4946 cut-off events. For 356763/356763 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 34088 event pairs, 604 based on Foata normal form. 8/4954 useless extension candidates. Maximal degree in co-relation 61229. Up to 3731 conditions per place. [2022-12-12 15:06:13,457 INFO L137 encePairwiseOnDemand]: 10/19 looper letters, 333 selfloop transitions, 158 changer transitions 38/529 dead transitions. [2022-12-12 15:06:13,457 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 529 transitions, 12023 flow [2022-12-12 15:06:13,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-12 15:06:13,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-12 15:06:13,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 123 transitions. [2022-12-12 15:06:13,458 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3407202216066482 [2022-12-12 15:06:13,458 INFO L175 Difference]: Start difference. First operand has 299 places, 410 transitions, 8850 flow. Second operand 19 states and 123 transitions. [2022-12-12 15:06:13,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 529 transitions, 12023 flow [2022-12-12 15:06:14,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 529 transitions, 11896 flow, removed 4 selfloop flow, removed 14 redundant places. [2022-12-12 15:06:14,243 INFO L231 Difference]: Finished difference. Result has 308 places, 440 transitions, 9783 flow [2022-12-12 15:06:14,243 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=8736, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=9783, PETRI_PLACES=308, PETRI_TRANSITIONS=440} [2022-12-12 15:06:14,244 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 287 predicate places. [2022-12-12 15:06:14,244 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 440 transitions, 9783 flow [2022-12-12 15:06:14,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 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 15:06:14,244 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:06:14,244 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:06:14,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-12-12 15:06:14,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-12-12 15:06:14,448 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:06:14,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:06:14,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1121885658, now seen corresponding path program 25 times [2022-12-12 15:06:14,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:06:14,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942720439] [2022-12-12 15:06:14,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:06:14,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:06:14,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:06:15,100 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:06:15,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:06:15,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942720439] [2022-12-12 15:06:15,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942720439] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:06:15,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463838995] [2022-12-12 15:06:15,100 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 15:06:15,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:06:15,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:06:15,112 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:06:15,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-12-12 15:06:15,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:06:15,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-12 15:06:15,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:06:15,929 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:06:15,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:06:16,213 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 15:06:16,213 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 20 treesize of output 4 [2022-12-12 15:06:16,262 INFO L321 Elim1Store]: treesize reduction 34, result has 62.6 percent of original size [2022-12-12 15:06:16,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 64 [2022-12-12 15:06:16,281 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 15:06:16,282 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 20 treesize of output 4 [2022-12-12 15:06:16,849 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:06:16,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463838995] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:06:16,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:06:16,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 44 [2022-12-12 15:06:16,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734852480] [2022-12-12 15:06:16,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:06:16,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-12 15:06:16,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:06:16,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-12 15:06:16,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1759, Unknown=0, NotChecked=0, Total=1980 [2022-12-12 15:06:16,851 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:06:16,851 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 440 transitions, 9783 flow. Second operand has 45 states, 45 states have (on average 1.6222222222222222) internal successors, (73), 44 states have internal predecessors, (73), 0 states have call successors, (0), 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 15:06:16,851 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:06:16,851 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:06:16,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:06:19,134 INFO L130 PetriNetUnfolder]: 2657/4988 cut-off events. [2022-12-12 15:06:19,134 INFO L131 PetriNetUnfolder]: For 370345/370345 co-relation queries the response was YES. [2022-12-12 15:06:19,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62828 conditions, 4988 events. 2657/4988 cut-off events. For 370345/370345 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 34700 event pairs, 641 based on Foata normal form. 12/5000 useless extension candidates. Maximal degree in co-relation 62683. Up to 4484 conditions per place. [2022-12-12 15:06:19,190 INFO L137 encePairwiseOnDemand]: 8/19 looper letters, 417 selfloop transitions, 63 changer transitions 0/480 dead transitions. [2022-12-12 15:06:19,191 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 480 transitions, 11387 flow [2022-12-12 15:06:19,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-12 15:06:19,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-12 15:06:19,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 78 transitions. [2022-12-12 15:06:19,192 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.24148606811145512 [2022-12-12 15:06:19,192 INFO L175 Difference]: Start difference. First operand has 308 places, 440 transitions, 9783 flow. Second operand 17 states and 78 transitions. [2022-12-12 15:06:19,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 480 transitions, 11387 flow [2022-12-12 15:06:19,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 480 transitions, 11006 flow, removed 89 selfloop flow, removed 9 redundant places. [2022-12-12 15:06:19,929 INFO L231 Difference]: Finished difference. Result has 315 places, 447 transitions, 9735 flow [2022-12-12 15:06:19,929 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=9402, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=9735, PETRI_PLACES=315, PETRI_TRANSITIONS=447} [2022-12-12 15:06:19,930 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 294 predicate places. [2022-12-12 15:06:19,930 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 447 transitions, 9735 flow [2022-12-12 15:06:19,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.6222222222222222) internal successors, (73), 44 states have internal predecessors, (73), 0 states have call successors, (0), 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 15:06:19,930 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:06:19,930 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:06:19,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-12-12 15:06:20,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:06:20,135 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:06:20,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:06:20,135 INFO L85 PathProgramCache]: Analyzing trace with hash 2099647941, now seen corresponding path program 14 times [2022-12-12 15:06:20,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:06:20,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534883305] [2022-12-12 15:06:20,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:06:20,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:06:20,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:06:20,740 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:06:20,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:06:20,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534883305] [2022-12-12 15:06:20,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534883305] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:06:20,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196291581] [2022-12-12 15:06:20,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 15:06:20,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:06:20,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:06:20,742 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:06:20,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-12-12 15:06:20,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 15:06:20,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:06:20,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-12 15:06:20,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:06:21,295 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-12 15:06:21,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:06:21,615 INFO L321 Elim1Store]: treesize reduction 34, result has 62.6 percent of original size [2022-12-12 15:06:21,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 64 [2022-12-12 15:06:21,780 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-12 15:06:21,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196291581] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:06:21,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:06:21,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 8] total 27 [2022-12-12 15:06:21,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717651931] [2022-12-12 15:06:21,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:06:21,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-12 15:06:21,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:06:21,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-12 15:06:21,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2022-12-12 15:06:21,782 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:06:21,782 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 447 transitions, 9735 flow. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 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 15:06:21,782 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:06:21,782 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:06:21,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:06:24,541 INFO L130 PetriNetUnfolder]: 2703/5077 cut-off events. [2022-12-12 15:06:24,541 INFO L131 PetriNetUnfolder]: For 389172/389172 co-relation queries the response was YES. [2022-12-12 15:06:24,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63841 conditions, 5077 events. 2703/5077 cut-off events. For 389172/389172 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 35407 event pairs, 633 based on Foata normal form. 12/5089 useless extension candidates. Maximal degree in co-relation 63693. Up to 3883 conditions per place. [2022-12-12 15:06:24,601 INFO L137 encePairwiseOnDemand]: 10/19 looper letters, 316 selfloop transitions, 196 changer transitions 15/527 dead transitions. [2022-12-12 15:06:24,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 527 transitions, 12344 flow [2022-12-12 15:06:24,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-12 15:06:24,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-12 15:06:24,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 131 transitions. [2022-12-12 15:06:24,602 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3133971291866029 [2022-12-12 15:06:24,602 INFO L175 Difference]: Start difference. First operand has 315 places, 447 transitions, 9735 flow. Second operand 22 states and 131 transitions. [2022-12-12 15:06:24,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 527 transitions, 12344 flow [2022-12-12 15:06:25,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 527 transitions, 12203 flow, removed 24 selfloop flow, removed 12 redundant places. [2022-12-12 15:06:25,393 INFO L231 Difference]: Finished difference. Result has 328 places, 468 transitions, 10569 flow [2022-12-12 15:06:25,393 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=9594, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=10569, PETRI_PLACES=328, PETRI_TRANSITIONS=468} [2022-12-12 15:06:25,393 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 307 predicate places. [2022-12-12 15:06:25,393 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 468 transitions, 10569 flow [2022-12-12 15:06:25,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 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 15:06:25,393 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:06:25,393 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:06:25,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-12-12 15:06:25,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:06:25,598 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:06:25,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:06:25,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1432182831, now seen corresponding path program 15 times [2022-12-12 15:06:25,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:06:25,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502860489] [2022-12-12 15:06:25,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:06:25,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:06:25,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:06:26,221 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:06:26,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:06:26,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502860489] [2022-12-12 15:06:26,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502860489] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:06:26,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287623611] [2022-12-12 15:06:26,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 15:06:26,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:06:26,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:06:26,232 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:06:26,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-12-12 15:06:26,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-12 15:06:26,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:06:26,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-12 15:06:26,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:06:27,004 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-12 15:06:27,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:06:27,226 INFO L321 Elim1Store]: treesize reduction 34, result has 62.6 percent of original size [2022-12-12 15:06:27,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 64 [2022-12-12 15:06:27,375 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-12 15:06:27,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287623611] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:06:27,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:06:27,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 8] total 23 [2022-12-12 15:06:27,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099977740] [2022-12-12 15:06:27,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:06:27,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-12 15:06:27,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:06:27,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-12 15:06:27,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-12-12 15:06:27,376 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:06:27,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 468 transitions, 10569 flow. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 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 15:06:27,376 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:06:27,376 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:06:27,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:06:29,914 INFO L130 PetriNetUnfolder]: 2697/5078 cut-off events. [2022-12-12 15:06:29,914 INFO L131 PetriNetUnfolder]: For 407872/407872 co-relation queries the response was YES. [2022-12-12 15:06:29,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65192 conditions, 5078 events. 2697/5078 cut-off events. For 407872/407872 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 35455 event pairs, 634 based on Foata normal form. 12/5090 useless extension candidates. Maximal degree in co-relation 65040. Up to 3879 conditions per place. [2022-12-12 15:06:29,979 INFO L137 encePairwiseOnDemand]: 10/19 looper letters, 324 selfloop transitions, 187 changer transitions 25/536 dead transitions. [2022-12-12 15:06:29,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 536 transitions, 12792 flow [2022-12-12 15:06:29,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-12 15:06:29,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-12 15:06:29,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 124 transitions. [2022-12-12 15:06:29,980 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3263157894736842 [2022-12-12 15:06:29,980 INFO L175 Difference]: Start difference. First operand has 328 places, 468 transitions, 10569 flow. Second operand 20 states and 124 transitions. [2022-12-12 15:06:29,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 536 transitions, 12792 flow [2022-12-12 15:06:30,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 536 transitions, 12437 flow, removed 80 selfloop flow, removed 14 redundant places. [2022-12-12 15:06:30,853 INFO L231 Difference]: Finished difference. Result has 331 places, 467 transitions, 10599 flow [2022-12-12 15:06:30,853 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=10230, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=10599, PETRI_PLACES=331, PETRI_TRANSITIONS=467} [2022-12-12 15:06:30,853 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 310 predicate places. [2022-12-12 15:06:30,853 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 467 transitions, 10599 flow [2022-12-12 15:06:30,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 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 15:06:30,854 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:06:30,854 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:06:30,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-12-12 15:06:31,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-12-12 15:06:31,058 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:06:31,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:06:31,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1354569161, now seen corresponding path program 16 times [2022-12-12 15:06:31,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:06:31,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157649101] [2022-12-12 15:06:31,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:06:31,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:06:31,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:06:31,595 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:06:31,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:06:31,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157649101] [2022-12-12 15:06:31,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157649101] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:06:31,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062938254] [2022-12-12 15:06:31,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 15:06:31,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:06:31,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:06:31,597 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:06:31,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-12-12 15:06:31,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 15:06:31,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:06:31,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-12 15:06:31,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:06:32,005 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-12 15:06:32,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:06:32,244 INFO L321 Elim1Store]: treesize reduction 34, result has 62.6 percent of original size [2022-12-12 15:06:32,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 64 [2022-12-12 15:06:32,358 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-12 15:06:32,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062938254] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:06:32,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:06:32,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 8] total 28 [2022-12-12 15:06:32,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561037925] [2022-12-12 15:06:32,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:06:32,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-12 15:06:32,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:06:32,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-12 15:06:32,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-12-12 15:06:32,360 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:06:32,360 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 467 transitions, 10599 flow. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 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 15:06:32,360 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:06:32,360 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:06:32,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:06:36,292 INFO L130 PetriNetUnfolder]: 2674/5028 cut-off events. [2022-12-12 15:06:36,292 INFO L131 PetriNetUnfolder]: For 404775/404775 co-relation queries the response was YES. [2022-12-12 15:06:36,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64637 conditions, 5028 events. 2674/5028 cut-off events. For 404775/404775 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 35026 event pairs, 632 based on Foata normal form. 12/5040 useless extension candidates. Maximal degree in co-relation 64486. Up to 3800 conditions per place. [2022-12-12 15:06:36,357 INFO L137 encePairwiseOnDemand]: 10/19 looper letters, 318 selfloop transitions, 209 changer transitions 3/530 dead transitions. [2022-12-12 15:06:36,357 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 530 transitions, 13030 flow [2022-12-12 15:06:36,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-12 15:06:36,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-12 15:06:36,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 130 transitions. [2022-12-12 15:06:36,358 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2974828375286041 [2022-12-12 15:06:36,358 INFO L175 Difference]: Start difference. First operand has 331 places, 467 transitions, 10599 flow. Second operand 23 states and 130 transitions. [2022-12-12 15:06:36,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 530 transitions, 13030 flow [2022-12-12 15:06:37,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 530 transitions, 12612 flow, removed 9 selfloop flow, removed 15 redundant places. [2022-12-12 15:06:37,325 INFO L231 Difference]: Finished difference. Result has 337 places, 470 transitions, 10720 flow [2022-12-12 15:06:37,325 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=10193, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=10720, PETRI_PLACES=337, PETRI_TRANSITIONS=470} [2022-12-12 15:06:37,326 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 316 predicate places. [2022-12-12 15:06:37,326 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 470 transitions, 10720 flow [2022-12-12 15:06:37,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 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 15:06:37,326 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:06:37,326 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:06:37,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-12-12 15:06:37,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-12-12 15:06:37,531 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:06:37,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:06:37,531 INFO L85 PathProgramCache]: Analyzing trace with hash 2078199749, now seen corresponding path program 17 times [2022-12-12 15:06:37,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:06:37,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656263132] [2022-12-12 15:06:37,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:06:37,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:06:37,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:06:37,970 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:06:37,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:06:37,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656263132] [2022-12-12 15:06:37,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656263132] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:06:37,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218895314] [2022-12-12 15:06:37,970 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 15:06:37,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:06:37,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:06:37,971 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:06:37,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-12-12 15:06:38,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-12 15:06:38,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:06:38,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-12 15:06:38,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:06:38,355 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-12 15:06:38,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:06:38,438 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-12 15:06:38,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-12-12 15:06:38,625 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-12 15:06:38,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218895314] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:06:38,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:06:38,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 6] total 22 [2022-12-12 15:06:38,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963286313] [2022-12-12 15:06:38,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:06:38,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-12 15:06:38,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:06:38,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-12 15:06:38,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-12-12 15:06:38,626 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:06:38,626 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 470 transitions, 10720 flow. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 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 15:06:38,626 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:06:38,626 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:06:38,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:06:41,170 INFO L130 PetriNetUnfolder]: 2786/5247 cut-off events. [2022-12-12 15:06:41,170 INFO L131 PetriNetUnfolder]: For 428976/428976 co-relation queries the response was YES. [2022-12-12 15:06:41,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67943 conditions, 5247 events. 2786/5247 cut-off events. For 428976/428976 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 37028 event pairs, 524 based on Foata normal form. 12/5259 useless extension candidates. Maximal degree in co-relation 67791. Up to 3633 conditions per place. [2022-12-12 15:06:41,242 INFO L137 encePairwiseOnDemand]: 11/19 looper letters, 361 selfloop transitions, 214 changer transitions 11/586 dead transitions. [2022-12-12 15:06:41,242 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 586 transitions, 14241 flow [2022-12-12 15:06:41,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-12 15:06:41,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-12 15:06:41,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 158 transitions. [2022-12-12 15:06:41,243 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.37799043062200954 [2022-12-12 15:06:41,243 INFO L175 Difference]: Start difference. First operand has 337 places, 470 transitions, 10720 flow. Second operand 22 states and 158 transitions. [2022-12-12 15:06:41,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 586 transitions, 14241 flow [2022-12-12 15:06:42,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 586 transitions, 13842 flow, removed 0 selfloop flow, removed 20 redundant places. [2022-12-12 15:06:42,402 INFO L231 Difference]: Finished difference. Result has 342 places, 484 transitions, 11149 flow [2022-12-12 15:06:42,403 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=10339, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=11149, PETRI_PLACES=342, PETRI_TRANSITIONS=484} [2022-12-12 15:06:42,411 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 321 predicate places. [2022-12-12 15:06:42,411 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 484 transitions, 11149 flow [2022-12-12 15:06:42,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 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 15:06:42,411 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:06:42,411 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:06:42,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-12-12 15:06:42,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-12-12 15:06:42,616 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:06:42,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:06:42,616 INFO L85 PathProgramCache]: Analyzing trace with hash 2129529488, now seen corresponding path program 26 times [2022-12-12 15:06:42,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:06:42,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780987804] [2022-12-12 15:06:42,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:06:42,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:06:42,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:06:43,347 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:06:43,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:06:43,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780987804] [2022-12-12 15:06:43,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780987804] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:06:43,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415557478] [2022-12-12 15:06:43,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 15:06:43,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:06:43,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:06:43,349 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:06:43,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-12-12 15:06:43,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 15:06:43,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:06:43,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-12 15:06:43,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:06:44,136 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:06:44,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:06:44,752 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 15:06:44,752 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 20 treesize of output 4 [2022-12-12 15:06:44,813 INFO L321 Elim1Store]: treesize reduction 34, result has 62.6 percent of original size [2022-12-12 15:06:44,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 64 [2022-12-12 15:06:44,837 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 15:06:44,837 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 20 treesize of output 4 [2022-12-12 15:06:45,539 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:06:45,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415557478] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:06:45,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:06:45,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 44 [2022-12-12 15:06:45,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348297858] [2022-12-12 15:06:45,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:06:45,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-12 15:06:45,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:06:45,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-12 15:06:45,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1754, Unknown=0, NotChecked=0, Total=1980 [2022-12-12 15:06:45,541 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:06:45,541 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 484 transitions, 11149 flow. Second operand has 45 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 44 states have internal predecessors, (71), 0 states have call successors, (0), 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 15:06:45,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:06:45,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:06:45,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:06:48,011 INFO L130 PetriNetUnfolder]: 2784/5245 cut-off events. [2022-12-12 15:06:48,011 INFO L131 PetriNetUnfolder]: For 446128/446128 co-relation queries the response was YES. [2022-12-12 15:06:48,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68833 conditions, 5245 events. 2784/5245 cut-off events. For 446128/446128 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 37017 event pairs, 728 based on Foata normal form. 2/5247 useless extension candidates. Maximal degree in co-relation 68676. Up to 5033 conditions per place. [2022-12-12 15:06:48,076 INFO L137 encePairwiseOnDemand]: 8/19 looper letters, 436 selfloop transitions, 64 changer transitions 2/502 dead transitions. [2022-12-12 15:06:48,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 502 transitions, 12410 flow [2022-12-12 15:06:48,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-12 15:06:48,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-12 15:06:48,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 74 transitions. [2022-12-12 15:06:48,077 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.19473684210526315 [2022-12-12 15:06:48,077 INFO L175 Difference]: Start difference. First operand has 342 places, 484 transitions, 11149 flow. Second operand 20 states and 74 transitions. [2022-12-12 15:06:48,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 502 transitions, 12410 flow [2022-12-12 15:06:48,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 502 transitions, 12033 flow, removed 26 selfloop flow, removed 14 redundant places. [2022-12-12 15:06:48,977 INFO L231 Difference]: Finished difference. Result has 348 places, 484 transitions, 10911 flow [2022-12-12 15:06:48,977 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=10776, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=10911, PETRI_PLACES=348, PETRI_TRANSITIONS=484} [2022-12-12 15:06:48,978 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 327 predicate places. [2022-12-12 15:06:48,978 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 484 transitions, 10911 flow [2022-12-12 15:06:48,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 44 states have internal predecessors, (71), 0 states have call successors, (0), 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 15:06:48,978 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:06:48,978 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:06:48,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-12-12 15:06:49,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-12-12 15:06:49,182 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:06:49,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:06:49,182 INFO L85 PathProgramCache]: Analyzing trace with hash -447094102, now seen corresponding path program 27 times [2022-12-12 15:06:49,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:06:49,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685746091] [2022-12-12 15:06:49,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:06:49,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:06:49,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:06:49,982 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:06:49,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:06:49,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685746091] [2022-12-12 15:06:49,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685746091] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:06:49,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440168732] [2022-12-12 15:06:49,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 15:06:49,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:06:49,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:06:49,984 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:06:49,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-12-12 15:06:50,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-12 15:06:50,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:06:50,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-12 15:06:50,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:06:51,046 INFO L321 Elim1Store]: treesize reduction 54, result has 16.9 percent of original size [2022-12-12 15:06:51,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 18 [2022-12-12 15:06:51,085 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 15:06:51,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:06:51,553 INFO L321 Elim1Store]: treesize reduction 34, result has 83.9 percent of original size [2022-12-12 15:06:51,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 95 treesize of output 206 [2022-12-12 15:06:52,163 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 15:06:52,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440168732] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:06:52,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:06:52,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 43 [2022-12-12 15:06:52,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23977393] [2022-12-12 15:06:52,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:06:52,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-12 15:06:52,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:06:52,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-12 15:06:52,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1703, Unknown=0, NotChecked=0, Total=1892 [2022-12-12 15:06:52,165 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:06:52,165 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 484 transitions, 10911 flow. Second operand has 44 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 43 states have internal predecessors, (69), 0 states have call successors, (0), 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 15:06:52,165 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:06:52,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:06:52,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:06:59,678 INFO L130 PetriNetUnfolder]: 4046/7540 cut-off events. [2022-12-12 15:06:59,679 INFO L131 PetriNetUnfolder]: For 672966/672966 co-relation queries the response was YES. [2022-12-12 15:06:59,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99902 conditions, 7540 events. 4046/7540 cut-off events. For 672966/672966 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 55853 event pairs, 258 based on Foata normal form. 80/7620 useless extension candidates. Maximal degree in co-relation 99420. Up to 2734 conditions per place. [2022-12-12 15:06:59,776 INFO L137 encePairwiseOnDemand]: 6/19 looper letters, 471 selfloop transitions, 579 changer transitions 13/1063 dead transitions. [2022-12-12 15:06:59,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 1063 transitions, 24644 flow [2022-12-12 15:06:59,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-12-12 15:06:59,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2022-12-12 15:06:59,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 362 transitions. [2022-12-12 15:06:59,777 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2609949531362653 [2022-12-12 15:06:59,777 INFO L175 Difference]: Start difference. First operand has 348 places, 484 transitions, 10911 flow. Second operand 73 states and 362 transitions. [2022-12-12 15:06:59,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 1063 transitions, 24644 flow [2022-12-12 15:07:01,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 1063 transitions, 24372 flow, removed 6 selfloop flow, removed 18 redundant places. [2022-12-12 15:07:01,182 INFO L231 Difference]: Finished difference. Result has 419 places, 805 transitions, 20241 flow [2022-12-12 15:07:01,183 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=10777, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=20241, PETRI_PLACES=419, PETRI_TRANSITIONS=805} [2022-12-12 15:07:01,184 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 398 predicate places. [2022-12-12 15:07:01,184 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 805 transitions, 20241 flow [2022-12-12 15:07:01,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 43 states have internal predecessors, (69), 0 states have call successors, (0), 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 15:07:01,185 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:07:01,185 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:07:01,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-12-12 15:07:01,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-12-12 15:07:01,390 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:07:01,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:07:01,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1354025776, now seen corresponding path program 28 times [2022-12-12 15:07:01,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:07:01,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386514052] [2022-12-12 15:07:01,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:07:01,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:07:01,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:07:02,184 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:07:02,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:07:02,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386514052] [2022-12-12 15:07:02,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386514052] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:07:02,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591220092] [2022-12-12 15:07:02,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 15:07:02,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:07:02,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:07:02,186 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:07:02,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-12-12 15:07:02,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 15:07:02,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:07:02,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-12 15:07:02,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:07:02,663 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-12 15:07:02,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:07:07,102 INFO L321 Elim1Store]: treesize reduction 19, result has 91.6 percent of original size [2022-12-12 15:07:07,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 95 treesize of output 236 [2022-12-12 15:07:10,583 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-12 15:07:10,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591220092] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:07:10,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:07:10,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 8] total 32 [2022-12-12 15:07:10,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966244209] [2022-12-12 15:07:10,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:07:10,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-12 15:07:10,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:07:10,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-12 15:07:10,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2022-12-12 15:07:10,585 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:07:10,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 805 transitions, 20241 flow. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 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 15:07:10,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:07:10,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:07:10,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:07:17,106 INFO L130 PetriNetUnfolder]: 4376/8110 cut-off events. [2022-12-12 15:07:17,106 INFO L131 PetriNetUnfolder]: For 1056897/1056897 co-relation queries the response was YES. [2022-12-12 15:07:17,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119030 conditions, 8110 events. 4376/8110 cut-off events. For 1056897/1056897 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 60874 event pairs, 767 based on Foata normal form. 180/8290 useless extension candidates. Maximal degree in co-relation 118522. Up to 5099 conditions per place. [2022-12-12 15:07:17,223 INFO L137 encePairwiseOnDemand]: 8/19 looper letters, 605 selfloop transitions, 407 changer transitions 66/1078 dead transitions. [2022-12-12 15:07:17,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 1078 transitions, 27735 flow [2022-12-12 15:07:17,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-12-12 15:07:17,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-12-12 15:07:17,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 315 transitions. [2022-12-12 15:07:17,252 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.30701754385964913 [2022-12-12 15:07:17,252 INFO L175 Difference]: Start difference. First operand has 419 places, 805 transitions, 20241 flow. Second operand 54 states and 315 transitions. [2022-12-12 15:07:17,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 1078 transitions, 27735 flow [2022-12-12 15:07:20,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 1078 transitions, 25556 flow, removed 864 selfloop flow, removed 23 redundant places. [2022-12-12 15:07:20,063 INFO L231 Difference]: Finished difference. Result has 470 places, 866 transitions, 21014 flow [2022-12-12 15:07:20,064 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=18268, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=805, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=336, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=21014, PETRI_PLACES=470, PETRI_TRANSITIONS=866} [2022-12-12 15:07:20,064 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 449 predicate places. [2022-12-12 15:07:20,064 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 866 transitions, 21014 flow [2022-12-12 15:07:20,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 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 15:07:20,065 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:07:20,065 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:07:20,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-12-12 15:07:20,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:07:20,268 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:07:20,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:07:20,268 INFO L85 PathProgramCache]: Analyzing trace with hash 485257232, now seen corresponding path program 29 times [2022-12-12 15:07:20,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:07:20,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439208962] [2022-12-12 15:07:20,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:07:20,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:07:20,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:07:20,874 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:07:20,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:07:20,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439208962] [2022-12-12 15:07:20,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439208962] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:07:20,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276504063] [2022-12-12 15:07:20,874 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 15:07:20,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:07:20,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:07:20,876 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:07:20,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-12-12 15:07:21,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-12-12 15:07:21,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:07:21,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-12 15:07:21,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:07:21,416 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-12 15:07:21,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:07:21,627 INFO L321 Elim1Store]: treesize reduction 47, result has 76.4 percent of original size [2022-12-12 15:07:21,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 89 treesize of output 177 [2022-12-12 15:07:22,168 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-12 15:07:22,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276504063] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:07:22,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:07:22,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 6] total 30 [2022-12-12 15:07:22,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264221898] [2022-12-12 15:07:22,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:07:22,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-12 15:07:22,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:07:22,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-12 15:07:22,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2022-12-12 15:07:22,169 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:07:22,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 866 transitions, 21014 flow. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 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 15:07:22,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:07:22,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:07:22,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:07:26,546 INFO L130 PetriNetUnfolder]: 4276/7954 cut-off events. [2022-12-12 15:07:26,546 INFO L131 PetriNetUnfolder]: For 1782856/1782856 co-relation queries the response was YES. [2022-12-12 15:07:26,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134807 conditions, 7954 events. 4276/7954 cut-off events. For 1782856/1782856 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 59685 event pairs, 843 based on Foata normal form. 8/7962 useless extension candidates. Maximal degree in co-relation 134611. Up to 6210 conditions per place. [2022-12-12 15:07:26,674 INFO L137 encePairwiseOnDemand]: 10/19 looper letters, 606 selfloop transitions, 307 changer transitions 11/924 dead transitions. [2022-12-12 15:07:26,675 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 924 transitions, 24268 flow [2022-12-12 15:07:26,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-12 15:07:26,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-12 15:07:26,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 117 transitions. [2022-12-12 15:07:26,677 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2565789473684211 [2022-12-12 15:07:26,677 INFO L175 Difference]: Start difference. First operand has 470 places, 866 transitions, 21014 flow. Second operand 24 states and 117 transitions. [2022-12-12 15:07:26,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 924 transitions, 24268 flow [2022-12-12 15:07:31,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 924 transitions, 23159 flow, removed 293 selfloop flow, removed 16 redundant places. [2022-12-12 15:07:31,737 INFO L231 Difference]: Finished difference. Result has 479 places, 873 transitions, 20722 flow [2022-12-12 15:07:31,738 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=19913, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=866, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=20722, PETRI_PLACES=479, PETRI_TRANSITIONS=873} [2022-12-12 15:07:31,738 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 458 predicate places. [2022-12-12 15:07:31,738 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 873 transitions, 20722 flow [2022-12-12 15:07:31,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 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 15:07:31,738 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:07:31,738 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:07:31,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-12-12 15:07:31,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:07:31,944 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:07:31,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:07:31,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1073971996, now seen corresponding path program 30 times [2022-12-12 15:07:31,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:07:31,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588517383] [2022-12-12 15:07:31,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:07:31,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:07:31,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:07:32,668 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:07:32,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:07:32,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588517383] [2022-12-12 15:07:32,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588517383] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:07:32,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771198905] [2022-12-12 15:07:32,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 15:07:32,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:07:32,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:07:32,670 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:07:32,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-12-12 15:07:33,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-12 15:07:33,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:07:33,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-12 15:07:33,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:07:33,751 INFO L321 Elim1Store]: treesize reduction 54, result has 16.9 percent of original size [2022-12-12 15:07:33,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 18 [2022-12-12 15:07:33,799 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:07:33,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:07:34,255 INFO L321 Elim1Store]: treesize reduction 34, result has 83.9 percent of original size [2022-12-12 15:07:34,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 95 treesize of output 206 [2022-12-12 15:07:35,092 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:07:35,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771198905] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:07:35,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:07:35,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 43 [2022-12-12 15:07:35,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888852302] [2022-12-12 15:07:35,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:07:35,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-12 15:07:35,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:07:35,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-12 15:07:35,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1722, Unknown=0, NotChecked=0, Total=1892 [2022-12-12 15:07:35,093 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:07:35,093 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 873 transitions, 20722 flow. Second operand has 44 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 43 states have internal predecessors, (69), 0 states have call successors, (0), 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 15:07:35,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:07:35,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:07:35,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:07:43,627 INFO L130 PetriNetUnfolder]: 5174/9596 cut-off events. [2022-12-12 15:07:43,627 INFO L131 PetriNetUnfolder]: For 2197348/2197348 co-relation queries the response was YES. [2022-12-12 15:07:43,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161165 conditions, 9596 events. 5174/9596 cut-off events. For 2197348/2197348 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 74378 event pairs, 298 based on Foata normal form. 10/9606 useless extension candidates. Maximal degree in co-relation 160967. Up to 3497 conditions per place. [2022-12-12 15:07:43,786 INFO L137 encePairwiseOnDemand]: 7/19 looper letters, 568 selfloop transitions, 723 changer transitions 12/1303 dead transitions. [2022-12-12 15:07:43,787 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 1303 transitions, 33341 flow [2022-12-12 15:07:43,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-12-12 15:07:43,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-12-12 15:07:43,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 257 transitions. [2022-12-12 15:07:43,788 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.23730378578024008 [2022-12-12 15:07:43,788 INFO L175 Difference]: Start difference. First operand has 479 places, 873 transitions, 20722 flow. Second operand 57 states and 257 transitions. [2022-12-12 15:07:43,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 1303 transitions, 33341 flow [2022-12-12 15:07:49,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 1303 transitions, 32675 flow, removed 10 selfloop flow, removed 18 redundant places. [2022-12-12 15:07:49,672 INFO L231 Difference]: Finished difference. Result has 527 places, 1089 transitions, 28024 flow [2022-12-12 15:07:49,672 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=20182, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=873, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=541, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=28024, PETRI_PLACES=527, PETRI_TRANSITIONS=1089} [2022-12-12 15:07:49,672 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 506 predicate places. [2022-12-12 15:07:49,672 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 1089 transitions, 28024 flow [2022-12-12 15:07:49,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 43 states have internal predecessors, (69), 0 states have call successors, (0), 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 15:07:49,673 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:07:49,673 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:07:49,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-12-12 15:07:49,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:07:49,877 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:07:49,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:07:49,878 INFO L85 PathProgramCache]: Analyzing trace with hash -683427864, now seen corresponding path program 31 times [2022-12-12 15:07:49,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:07:49,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153886299] [2022-12-12 15:07:49,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:07:49,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:07:49,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:07:50,486 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:07:50,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:07:50,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153886299] [2022-12-12 15:07:50,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153886299] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:07:50,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047827807] [2022-12-12 15:07:50,486 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 15:07:50,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:07:50,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:07:50,494 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:07:50,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-12-12 15:07:50,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:07:50,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-12 15:07:50,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:07:51,211 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:07:51,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:07:51,329 INFO L321 Elim1Store]: treesize reduction 11, result has 87.1 percent of original size [2022-12-12 15:07:51,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 88 [2022-12-12 15:07:51,989 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:07:51,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047827807] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:07:51,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:07:51,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 43 [2022-12-12 15:07:51,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259064711] [2022-12-12 15:07:51,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:07:51,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-12 15:07:51,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:07:51,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-12 15:07:51,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1681, Unknown=0, NotChecked=0, Total=1892 [2022-12-12 15:07:51,990 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:07:51,990 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 1089 transitions, 28024 flow. Second operand has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 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 15:07:51,990 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:07:51,990 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:07:51,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:07:57,161 INFO L130 PetriNetUnfolder]: 5157/9535 cut-off events. [2022-12-12 15:07:57,161 INFO L131 PetriNetUnfolder]: For 2567305/2567305 co-relation queries the response was YES. [2022-12-12 15:07:57,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171367 conditions, 9535 events. 5157/9535 cut-off events. For 2567305/2567305 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 73660 event pairs, 1105 based on Foata normal form. 4/9539 useless extension candidates. Maximal degree in co-relation 171157. Up to 8982 conditions per place. [2022-12-12 15:07:57,453 INFO L137 encePairwiseOnDemand]: 10/19 looper letters, 958 selfloop transitions, 153 changer transitions 6/1117 dead transitions. [2022-12-12 15:07:57,453 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 1117 transitions, 30878 flow [2022-12-12 15:07:57,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-12 15:07:57,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-12 15:07:57,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 74 transitions. [2022-12-12 15:07:57,454 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.21637426900584794 [2022-12-12 15:07:57,454 INFO L175 Difference]: Start difference. First operand has 527 places, 1089 transitions, 28024 flow. Second operand 18 states and 74 transitions. [2022-12-12 15:07:57,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 1117 transitions, 30878 flow [2022-12-12 15:08:05,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 1117 transitions, 29870 flow, removed 377 selfloop flow, removed 31 redundant places. [2022-12-12 15:08:05,533 INFO L231 Difference]: Finished difference. Result has 513 places, 1092 transitions, 27553 flow [2022-12-12 15:08:05,534 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=27016, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1089, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=938, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=27553, PETRI_PLACES=513, PETRI_TRANSITIONS=1092} [2022-12-12 15:08:05,534 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 492 predicate places. [2022-12-12 15:08:05,534 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 1092 transitions, 27553 flow [2022-12-12 15:08:05,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 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 15:08:05,535 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:08:05,535 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:08:05,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-12-12 15:08:05,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:08:05,739 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:08:05,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:08:05,739 INFO L85 PathProgramCache]: Analyzing trace with hash 644371710, now seen corresponding path program 32 times [2022-12-12 15:08:05,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:08:05,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457301618] [2022-12-12 15:08:05,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:08:05,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:08:05,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:08:06,386 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:08:06,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:08:06,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457301618] [2022-12-12 15:08:06,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457301618] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:08:06,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505109109] [2022-12-12 15:08:06,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 15:08:06,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:08:06,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:08:06,388 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:08:06,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-12-12 15:08:06,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 15:08:06,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:08:06,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-12 15:08:06,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:08:07,043 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:08:07,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:08:07,302 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 15:08:07,302 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 20 treesize of output 4 [2022-12-12 15:08:07,341 INFO L321 Elim1Store]: treesize reduction 34, result has 62.6 percent of original size [2022-12-12 15:08:07,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 64 [2022-12-12 15:08:07,354 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 15:08:07,354 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 20 treesize of output 4 [2022-12-12 15:08:07,845 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:08:07,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505109109] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:08:07,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:08:07,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 44 [2022-12-12 15:08:07,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95208582] [2022-12-12 15:08:07,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:08:07,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-12 15:08:07,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:08:07,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-12 15:08:07,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1752, Unknown=0, NotChecked=0, Total=1980 [2022-12-12 15:08:07,847 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:08:07,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 1092 transitions, 27553 flow. Second operand has 45 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 44 states have internal predecessors, (71), 0 states have call successors, (0), 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 15:08:07,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:08:07,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:08:07,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:08:13,128 INFO L130 PetriNetUnfolder]: 5187/9597 cut-off events. [2022-12-12 15:08:13,128 INFO L131 PetriNetUnfolder]: For 2662309/2662309 co-relation queries the response was YES. [2022-12-12 15:08:13,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170894 conditions, 9597 events. 5187/9597 cut-off events. For 2662309/2662309 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 74271 event pairs, 1097 based on Foata normal form. 36/9633 useless extension candidates. Maximal degree in co-relation 170681. Up to 8937 conditions per place. [2022-12-12 15:08:13,294 INFO L137 encePairwiseOnDemand]: 9/19 looper letters, 952 selfloop transitions, 192 changer transitions 8/1152 dead transitions. [2022-12-12 15:08:13,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 1152 transitions, 30943 flow [2022-12-12 15:08:13,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-12 15:08:13,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-12 15:08:13,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 106 transitions. [2022-12-12 15:08:13,295 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2324561403508772 [2022-12-12 15:08:13,295 INFO L175 Difference]: Start difference. First operand has 513 places, 1092 transitions, 27553 flow. Second operand 24 states and 106 transitions. [2022-12-12 15:08:13,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 1152 transitions, 30943 flow [2022-12-12 15:08:21,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 1152 transitions, 30553 flow, removed 60 selfloop flow, removed 14 redundant places. [2022-12-12 15:08:21,179 INFO L231 Difference]: Finished difference. Result has 522 places, 1098 transitions, 27724 flow [2022-12-12 15:08:21,180 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=27163, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1092, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=900, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=27724, PETRI_PLACES=522, PETRI_TRANSITIONS=1098} [2022-12-12 15:08:21,180 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 501 predicate places. [2022-12-12 15:08:21,180 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 1098 transitions, 27724 flow [2022-12-12 15:08:21,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 44 states have internal predecessors, (71), 0 states have call successors, (0), 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 15:08:21,181 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:08:21,181 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:08:21,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-12-12 15:08:21,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-12-12 15:08:21,385 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:08:21,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:08:21,386 INFO L85 PathProgramCache]: Analyzing trace with hash -2091366358, now seen corresponding path program 33 times [2022-12-12 15:08:21,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:08:21,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049862337] [2022-12-12 15:08:21,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:08:21,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:08:21,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:08:22,145 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:08:22,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:08:22,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049862337] [2022-12-12 15:08:22,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049862337] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:08:22,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623143971] [2022-12-12 15:08:22,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 15:08:22,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:08:22,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:08:22,147 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:08:22,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-12-12 15:08:22,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-12 15:08:22,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:08:22,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 71 conjunts are in the unsatisfiable core [2022-12-12 15:08:22,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:08:22,555 INFO L321 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2022-12-12 15:08:22,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 12 treesize of output 16 [2022-12-12 15:08:22,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 15:08:22,766 INFO L321 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-12-12 15:08:22,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 14 [2022-12-12 15:08:22,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-12 15:08:23,011 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 15:08:23,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 15:08:23,384 INFO L321 Elim1Store]: treesize reduction 54, result has 16.9 percent of original size [2022-12-12 15:08:23,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 18 [2022-12-12 15:08:23,421 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:08:23,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:08:26,372 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:08:26,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 45 [2022-12-12 15:08:26,384 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:08:26,384 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 1718 treesize of output 1474 [2022-12-12 15:08:26,398 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:08:26,399 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 1462 treesize of output 1087 [2022-12-12 15:08:26,413 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:08:26,414 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 1078 treesize of output 895 [2022-12-12 15:08:26,605 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:08:26,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 45 [2022-12-12 15:08:26,616 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:08:26,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 422 treesize of output 370 [2022-12-12 15:08:26,628 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:08:26,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 358 treesize of output 319 [2022-12-12 15:08:26,640 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:08:26,641 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 310 treesize of output 223 [2022-12-12 15:08:26,756 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:08:26,756 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 15:08:26,808 INFO L321 Elim1Store]: treesize reduction 34, result has 62.6 percent of original size [2022-12-12 15:08:26,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 860 treesize of output 780 [2022-12-12 15:08:26,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 15:08:26,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 15:08:26,841 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:08:26,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 724 treesize of output 566 [2022-12-12 15:08:26,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 15:08:26,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 15:08:26,873 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:08:26,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 516 treesize of output 462 [2022-12-12 15:08:29,057 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:08:29,057 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 15:08:29,112 INFO L321 Elim1Store]: treesize reduction 34, result has 62.6 percent of original size [2022-12-12 15:08:29,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 3500 treesize of output 3012 [2022-12-12 15:08:29,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 15:08:29,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 15:08:29,158 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:08:29,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 2956 treesize of output 2590 [2022-12-12 15:08:29,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 15:08:29,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 15:08:29,299 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:08:29,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 2540 treesize of output 1758 [2022-12-12 15:08:31,531 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 16 refuted. 3 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:08:31,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623143971] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:08:31,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:08:31,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 46 [2022-12-12 15:08:31,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433934477] [2022-12-12 15:08:31,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:08:31,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-12 15:08:31,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:08:31,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-12 15:08:31,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1956, Unknown=18, NotChecked=0, Total=2162 [2022-12-12 15:08:31,532 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:08:31,532 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 1098 transitions, 27724 flow. Second operand has 47 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 46 states have internal predecessors, (69), 0 states have call successors, (0), 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 15:08:31,532 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:08:31,532 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:08:31,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:08:43,808 INFO L130 PetriNetUnfolder]: 6567/12270 cut-off events. [2022-12-12 15:08:43,808 INFO L131 PetriNetUnfolder]: For 3363343/3363343 co-relation queries the response was YES. [2022-12-12 15:08:43,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216410 conditions, 12270 events. 6567/12270 cut-off events. For 3363343/3363343 co-relation queries the response was YES. Maximal size of possible extension queue 738. Compared 100718 event pairs, 488 based on Foata normal form. 88/12358 useless extension candidates. Maximal degree in co-relation 216196. Up to 3504 conditions per place. [2022-12-12 15:08:44,043 INFO L137 encePairwiseOnDemand]: 6/19 looper letters, 571 selfloop transitions, 1113 changer transitions 23/1707 dead transitions. [2022-12-12 15:08:44,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 1707 transitions, 45175 flow [2022-12-12 15:08:44,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-12-12 15:08:44,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-12-12 15:08:44,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 367 transitions. [2022-12-12 15:08:44,060 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2799389778794813 [2022-12-12 15:08:44,060 INFO L175 Difference]: Start difference. First operand has 522 places, 1098 transitions, 27724 flow. Second operand 69 states and 367 transitions. [2022-12-12 15:08:44,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 1707 transitions, 45175 flow [2022-12-12 15:08:53,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 1707 transitions, 44677 flow, removed 66 selfloop flow, removed 20 redundant places. [2022-12-12 15:08:53,483 INFO L231 Difference]: Finished difference. Result has 586 places, 1456 transitions, 40382 flow [2022-12-12 15:08:53,484 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=27310, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1098, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=812, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=40382, PETRI_PLACES=586, PETRI_TRANSITIONS=1456} [2022-12-12 15:08:53,484 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 565 predicate places. [2022-12-12 15:08:53,484 INFO L495 AbstractCegarLoop]: Abstraction has has 586 places, 1456 transitions, 40382 flow [2022-12-12 15:08:53,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 46 states have internal predecessors, (69), 0 states have call successors, (0), 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 15:08:53,484 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:08:53,484 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:08:53,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-12-12 15:08:53,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-12-12 15:08:53,689 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:08:53,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:08:53,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1433437641, now seen corresponding path program 18 times [2022-12-12 15:08:53,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:08:53,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291233451] [2022-12-12 15:08:53,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:08:53,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:08:53,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:08:54,173 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:08:54,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:08:54,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291233451] [2022-12-12 15:08:54,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291233451] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:08:54,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349067706] [2022-12-12 15:08:54,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 15:08:54,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:08:54,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:08:54,175 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:08:54,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-12-12 15:08:54,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-12-12 15:08:54,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:08:54,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-12 15:08:54,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:08:55,226 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:08:55,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:08:55,413 INFO L321 Elim1Store]: treesize reduction 34, result has 62.6 percent of original size [2022-12-12 15:08:55,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 64 [2022-12-12 15:08:56,204 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:08:56,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349067706] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:08:56,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:08:56,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 16] total 43 [2022-12-12 15:08:56,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876900663] [2022-12-12 15:08:56,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:08:56,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-12 15:08:56,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:08:56,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-12 15:08:56,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1607, Unknown=0, NotChecked=0, Total=1892 [2022-12-12 15:08:56,205 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:08:56,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 586 places, 1456 transitions, 40382 flow. Second operand has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 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 15:08:56,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:08:56,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:08:56,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:09:12,966 INFO L130 PetriNetUnfolder]: 10874/19933 cut-off events. [2022-12-12 15:09:12,966 INFO L131 PetriNetUnfolder]: For 6282553/6282553 co-relation queries the response was YES. [2022-12-12 15:09:13,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379332 conditions, 19933 events. 10874/19933 cut-off events. For 6282553/6282553 co-relation queries the response was YES. Maximal size of possible extension queue 1179. Compared 171122 event pairs, 605 based on Foata normal form. 864/20797 useless extension candidates. Maximal degree in co-relation 379102. Up to 5743 conditions per place. [2022-12-12 15:09:13,384 INFO L137 encePairwiseOnDemand]: 7/19 looper letters, 1498 selfloop transitions, 1640 changer transitions 27/3165 dead transitions. [2022-12-12 15:09:13,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 656 places, 3165 transitions, 97956 flow [2022-12-12 15:09:13,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-12-12 15:09:13,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2022-12-12 15:09:13,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 455 transitions. [2022-12-12 15:09:13,385 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3280461427541456 [2022-12-12 15:09:13,385 INFO L175 Difference]: Start difference. First operand has 586 places, 1456 transitions, 40382 flow. Second operand 73 states and 455 transitions. [2022-12-12 15:09:13,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 656 places, 3165 transitions, 97956 flow [2022-12-12 15:09:41,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 618 places, 3165 transitions, 93993 flow, removed 1680 selfloop flow, removed 38 redundant places. [2022-12-12 15:09:41,736 INFO L231 Difference]: Finished difference. Result has 657 places, 2403 transitions, 74443 flow [2022-12-12 15:09:41,737 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=37603, PETRI_DIFFERENCE_MINUEND_PLACES=546, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=725, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=74443, PETRI_PLACES=657, PETRI_TRANSITIONS=2403} [2022-12-12 15:09:41,737 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 636 predicate places. [2022-12-12 15:09:41,737 INFO L495 AbstractCegarLoop]: Abstraction has has 657 places, 2403 transitions, 74443 flow [2022-12-12 15:09:41,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 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 15:09:41,738 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:09:41,738 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:09:41,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-12-12 15:09:41,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-12-12 15:09:41,943 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:09:41,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:09:41,943 INFO L85 PathProgramCache]: Analyzing trace with hash -421278766, now seen corresponding path program 34 times [2022-12-12 15:09:41,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:09:41,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706499853] [2022-12-12 15:09:41,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:09:41,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:09:41,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:09:42,603 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:09:42,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:09:42,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706499853] [2022-12-12 15:09:42,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706499853] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:09:42,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206430009] [2022-12-12 15:09:42,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 15:09:42,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:09:42,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:09:42,606 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:09:42,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-12-12 15:09:42,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 15:09:42,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:09:42,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-12 15:09:42,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:09:43,050 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-12 15:09:43,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:09:43,151 INFO L321 Elim1Store]: treesize reduction 28, result has 67.1 percent of original size [2022-12-12 15:09:43,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 71 [2022-12-12 15:09:43,230 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-12 15:09:43,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206430009] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:09:43,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:09:43,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 5] total 29 [2022-12-12 15:09:43,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401208039] [2022-12-12 15:09:43,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:09:43,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-12 15:09:43,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:09:43,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-12 15:09:43,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2022-12-12 15:09:43,231 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:09:43,231 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 657 places, 2403 transitions, 74443 flow. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 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 15:09:43,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:09:43,232 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:09:43,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:09:59,707 INFO L130 PetriNetUnfolder]: 10710/19431 cut-off events. [2022-12-12 15:09:59,707 INFO L131 PetriNetUnfolder]: For 6026157/6026157 co-relation queries the response was YES. [2022-12-12 15:10:00,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386763 conditions, 19431 events. 10710/19431 cut-off events. For 6026157/6026157 co-relation queries the response was YES. Maximal size of possible extension queue 1120. Compared 164511 event pairs, 1925 based on Foata normal form. 28/19459 useless extension candidates. Maximal degree in co-relation 386496. Up to 14996 conditions per place. [2022-12-12 15:10:00,180 INFO L137 encePairwiseOnDemand]: 8/19 looper letters, 2099 selfloop transitions, 425 changer transitions 32/2556 dead transitions. [2022-12-12 15:10:00,180 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 679 places, 2556 transitions, 83829 flow [2022-12-12 15:10:00,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-12 15:10:00,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-12 15:10:00,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 98 transitions. [2022-12-12 15:10:00,181 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2242562929061785 [2022-12-12 15:10:00,181 INFO L175 Difference]: Start difference. First operand has 657 places, 2403 transitions, 74443 flow. Second operand 23 states and 98 transitions. [2022-12-12 15:10:00,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 679 places, 2556 transitions, 83829 flow [2022-12-12 15:10:33,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 668 places, 2556 transitions, 81945 flow, removed 920 selfloop flow, removed 11 redundant places. [2022-12-12 15:10:33,968 INFO L231 Difference]: Finished difference. Result has 672 places, 2398 transitions, 73649 flow [2022-12-12 15:10:33,969 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=72719, PETRI_DIFFERENCE_MINUEND_PLACES=646, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=424, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1979, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=73649, PETRI_PLACES=672, PETRI_TRANSITIONS=2398} [2022-12-12 15:10:33,969 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 651 predicate places. [2022-12-12 15:10:33,969 INFO L495 AbstractCegarLoop]: Abstraction has has 672 places, 2398 transitions, 73649 flow [2022-12-12 15:10:33,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 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 15:10:33,970 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:10:33,970 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:10:33,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-12-12 15:10:34,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:10:34,174 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:10:34,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:10:34,175 INFO L85 PathProgramCache]: Analyzing trace with hash -573286903, now seen corresponding path program 19 times [2022-12-12 15:10:34,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:10:34,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063709851] [2022-12-12 15:10:34,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:10:34,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:10:34,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:10:34,544 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:10:34,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:10:34,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063709851] [2022-12-12 15:10:34,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063709851] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:10:34,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105456419] [2022-12-12 15:10:34,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 15:10:34,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:10:34,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:10:34,546 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:10:34,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-12-12 15:10:34,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:10:34,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-12 15:10:34,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:10:35,036 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:10:35,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:10:35,144 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-12 15:10:35,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-12-12 15:10:35,242 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-12 15:10:35,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105456419] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:10:35,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:10:35,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 6] total 27 [2022-12-12 15:10:35,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641460452] [2022-12-12 15:10:35,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:10:35,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-12 15:10:35,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:10:35,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-12 15:10:35,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2022-12-12 15:10:35,244 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:10:35,244 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 672 places, 2398 transitions, 73649 flow. Second operand has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 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 15:10:35,244 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:10:35,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:10:35,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:10:51,828 INFO L130 PetriNetUnfolder]: 10758/19469 cut-off events. [2022-12-12 15:10:51,828 INFO L131 PetriNetUnfolder]: For 6368203/6368203 co-relation queries the response was YES. [2022-12-12 15:10:52,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 389398 conditions, 19469 events. 10758/19469 cut-off events. For 6368203/6368203 co-relation queries the response was YES. Maximal size of possible extension queue 1157. Compared 164260 event pairs, 1797 based on Foata normal form. 84/19553 useless extension candidates. Maximal degree in co-relation 389127. Up to 15407 conditions per place. [2022-12-12 15:10:52,462 INFO L137 encePairwiseOnDemand]: 10/19 looper letters, 1830 selfloop transitions, 738 changer transitions 5/2573 dead transitions. [2022-12-12 15:10:52,463 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 693 places, 2573 transitions, 85776 flow [2022-12-12 15:10:52,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-12 15:10:52,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-12 15:10:52,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 160 transitions. [2022-12-12 15:10:52,464 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.31189083820662766 [2022-12-12 15:10:52,464 INFO L175 Difference]: Start difference. First operand has 672 places, 2398 transitions, 73649 flow. Second operand 27 states and 160 transitions. [2022-12-12 15:10:52,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 693 places, 2573 transitions, 85776 flow [2022-12-12 15:11:28,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 676 places, 2573 transitions, 85027 flow, removed 87 selfloop flow, removed 17 redundant places. [2022-12-12 15:11:28,930 INFO L231 Difference]: Finished difference. Result has 686 places, 2448 transitions, 77011 flow [2022-12-12 15:11:28,931 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=72943, PETRI_DIFFERENCE_MINUEND_PLACES=650, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=688, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1690, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=77011, PETRI_PLACES=686, PETRI_TRANSITIONS=2448} [2022-12-12 15:11:28,932 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 665 predicate places. [2022-12-12 15:11:28,932 INFO L495 AbstractCegarLoop]: Abstraction has has 686 places, 2448 transitions, 77011 flow [2022-12-12 15:11:28,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 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 15:11:28,932 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:11:28,932 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:11:28,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-12-12 15:11:29,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:11:29,137 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:11:29,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:11:29,137 INFO L85 PathProgramCache]: Analyzing trace with hash 795892933, now seen corresponding path program 20 times [2022-12-12 15:11:29,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:11:29,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222782101] [2022-12-12 15:11:29,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:11:29,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:11:29,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:11:29,519 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:11:29,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:11:29,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222782101] [2022-12-12 15:11:29,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222782101] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:11:29,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263986478] [2022-12-12 15:11:29,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 15:11:29,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:11:29,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:11:29,520 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:11:29,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-12-12 15:11:29,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 15:11:29,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:11:29,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-12 15:11:29,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:11:29,933 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-12 15:11:29,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:11:30,046 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-12 15:11:30,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-12-12 15:11:30,144 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-12 15:11:30,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263986478] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:11:30,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:11:30,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 6] total 24 [2022-12-12 15:11:30,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401071444] [2022-12-12 15:11:30,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:11:30,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-12 15:11:30,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:11:30,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-12 15:11:30,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-12-12 15:11:30,145 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:11:30,145 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 686 places, 2448 transitions, 77011 flow. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 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 15:11:30,145 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:11:30,145 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:11:30,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:11:46,992 INFO L130 PetriNetUnfolder]: 10644/19223 cut-off events. [2022-12-12 15:11:46,992 INFO L131 PetriNetUnfolder]: For 6213682/6213682 co-relation queries the response was YES. [2022-12-12 15:11:47,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386859 conditions, 19223 events. 10644/19223 cut-off events. For 6213682/6213682 co-relation queries the response was YES. Maximal size of possible extension queue 1134. Compared 161394 event pairs, 1785 based on Foata normal form. 48/19271 useless extension candidates. Maximal degree in co-relation 386581. Up to 15607 conditions per place. [2022-12-12 15:11:47,466 INFO L137 encePairwiseOnDemand]: 10/19 looper letters, 1850 selfloop transitions, 676 changer transitions 26/2552 dead transitions. [2022-12-12 15:11:47,466 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 708 places, 2552 transitions, 85847 flow [2022-12-12 15:11:47,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-12 15:11:47,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-12 15:11:47,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 141 transitions. [2022-12-12 15:11:47,467 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.32265446224256294 [2022-12-12 15:11:47,467 INFO L175 Difference]: Start difference. First operand has 686 places, 2448 transitions, 77011 flow. Second operand 23 states and 141 transitions. [2022-12-12 15:11:47,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 708 places, 2552 transitions, 85847 flow [2022-12-12 15:12:20,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 692 places, 2552 transitions, 83857 flow, removed 284 selfloop flow, removed 16 redundant places. [2022-12-12 15:12:20,670 INFO L231 Difference]: Finished difference. Result has 692 places, 2430 transitions, 75976 flow [2022-12-12 15:12:20,671 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=74753, PETRI_DIFFERENCE_MINUEND_PLACES=670, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=676, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1761, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=75976, PETRI_PLACES=692, PETRI_TRANSITIONS=2430} [2022-12-12 15:12:20,671 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 671 predicate places. [2022-12-12 15:12:20,672 INFO L495 AbstractCegarLoop]: Abstraction has has 692 places, 2430 transitions, 75976 flow [2022-12-12 15:12:20,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 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 15:12:20,672 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:12:20,672 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:12:20,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-12-12 15:12:20,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-12-12 15:12:20,877 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:12:20,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:12:20,877 INFO L85 PathProgramCache]: Analyzing trace with hash 201673424, now seen corresponding path program 35 times [2022-12-12 15:12:20,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:12:20,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481354629] [2022-12-12 15:12:20,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:12:20,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:12:20,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:12:21,537 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:12:21,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:12:21,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481354629] [2022-12-12 15:12:21,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481354629] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:12:21,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726098096] [2022-12-12 15:12:21,537 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 15:12:21,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:12:21,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:12:21,538 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:12:21,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-12-12 15:12:21,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-12-12 15:12:21,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:12:21,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-12 15:12:21,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:12:22,035 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-12 15:12:22,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:12:22,247 INFO L321 Elim1Store]: treesize reduction 47, result has 76.4 percent of original size [2022-12-12 15:12:22,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 89 treesize of output 177 [2022-12-12 15:12:22,493 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-12 15:12:22,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726098096] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:12:22,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:12:22,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 6] total 30 [2022-12-12 15:12:22,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317334308] [2022-12-12 15:12:22,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:12:22,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-12 15:12:22,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:12:22,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-12 15:12:22,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2022-12-12 15:12:22,495 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:12:22,495 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 692 places, 2430 transitions, 75976 flow. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 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 15:12:22,495 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:12:22,495 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:12:22,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:12:40,132 INFO L130 PetriNetUnfolder]: 10546/19039 cut-off events. [2022-12-12 15:12:40,132 INFO L131 PetriNetUnfolder]: For 6075912/6075912 co-relation queries the response was YES. [2022-12-12 15:12:40,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 380527 conditions, 19039 events. 10546/19039 cut-off events. For 6075912/6075912 co-relation queries the response was YES. Maximal size of possible extension queue 1121. Compared 159392 event pairs, 1785 based on Foata normal form. 40/19079 useless extension candidates. Maximal degree in co-relation 380251. Up to 15607 conditions per place. [2022-12-12 15:12:40,657 INFO L137 encePairwiseOnDemand]: 10/19 looper letters, 1838 selfloop transitions, 672 changer transitions 9/2519 dead transitions. [2022-12-12 15:12:40,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 714 places, 2519 transitions, 83918 flow [2022-12-12 15:12:40,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-12 15:12:40,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-12 15:12:40,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 113 transitions. [2022-12-12 15:12:40,658 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.22874493927125505 [2022-12-12 15:12:40,658 INFO L175 Difference]: Start difference. First operand has 692 places, 2430 transitions, 75976 flow. Second operand 26 states and 113 transitions. [2022-12-12 15:12:40,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 714 places, 2519 transitions, 83918 flow [2022-12-12 15:13:14,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 694 places, 2519 transitions, 82490 flow, removed 22 selfloop flow, removed 20 redundant places. [2022-12-12 15:13:14,067 INFO L231 Difference]: Finished difference. Result has 696 places, 2425 transitions, 75806 flow [2022-12-12 15:13:14,069 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=74374, PETRI_DIFFERENCE_MINUEND_PLACES=669, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=672, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1754, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=75806, PETRI_PLACES=696, PETRI_TRANSITIONS=2425} [2022-12-12 15:13:14,069 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 675 predicate places. [2022-12-12 15:13:14,069 INFO L495 AbstractCegarLoop]: Abstraction has has 696 places, 2425 transitions, 75806 flow [2022-12-12 15:13:14,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 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 15:13:14,069 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:13:14,069 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:13:14,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-12-12 15:13:14,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:13:14,275 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:13:14,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:13:14,275 INFO L85 PathProgramCache]: Analyzing trace with hash -967011672, now seen corresponding path program 36 times [2022-12-12 15:13:14,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:13:14,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812074959] [2022-12-12 15:13:14,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:13:14,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:13:14,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:13:14,914 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:13:14,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:13:14,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812074959] [2022-12-12 15:13:14,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812074959] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:13:14,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906483500] [2022-12-12 15:13:14,915 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 15:13:14,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:13:14,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:13:14,916 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:13:14,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-12-12 15:13:15,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-12-12 15:13:15,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:13:15,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-12 15:13:15,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:13:15,896 INFO L321 Elim1Store]: treesize reduction 54, result has 16.9 percent of original size [2022-12-12 15:13:15,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 18 [2022-12-12 15:13:15,951 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 15:13:15,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:13:16,274 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:13:16,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 88 treesize of output 259 [2022-12-12 15:13:19,897 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 15:13:19,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906483500] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:13:19,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:13:19,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 44 [2022-12-12 15:13:19,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185702487] [2022-12-12 15:13:19,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:13:19,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-12 15:13:19,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:13:19,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-12 15:13:19,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1820, Unknown=0, NotChecked=0, Total=1980 [2022-12-12 15:13:19,899 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:13:19,899 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 696 places, 2425 transitions, 75806 flow. Second operand has 45 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 44 states have internal predecessors, (71), 0 states have call successors, (0), 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 15:13:19,899 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:13:19,899 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:13:19,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:13:44,825 INFO L130 PetriNetUnfolder]: 12257/22085 cut-off events. [2022-12-12 15:13:44,825 INFO L131 PetriNetUnfolder]: For 7796124/7796124 co-relation queries the response was YES. [2022-12-12 15:13:45,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455144 conditions, 22085 events. 12257/22085 cut-off events. For 7796124/7796124 co-relation queries the response was YES. Maximal size of possible extension queue 1267. Compared 189401 event pairs, 790 based on Foata normal form. 46/22131 useless extension candidates. Maximal degree in co-relation 454867. Up to 6664 conditions per place. [2022-12-12 15:13:45,407 INFO L137 encePairwiseOnDemand]: 7/19 looper letters, 994 selfloop transitions, 2231 changer transitions 119/3344 dead transitions. [2022-12-12 15:13:45,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 776 places, 3344 transitions, 108017 flow [2022-12-12 15:13:45,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-12-12 15:13:45,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2022-12-12 15:13:45,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 419 transitions. [2022-12-12 15:13:45,409 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.262531328320802 [2022-12-12 15:13:45,409 INFO L175 Difference]: Start difference. First operand has 696 places, 2425 transitions, 75806 flow. Second operand 84 states and 419 transitions. [2022-12-12 15:13:45,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 776 places, 3344 transitions, 108017 flow [2022-12-12 15:14:28,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 753 places, 3344 transitions, 106967 flow, removed 32 selfloop flow, removed 23 redundant places. [2022-12-12 15:14:28,274 INFO L231 Difference]: Finished difference. Result has 779 places, 2822 transitions, 94695 flow [2022-12-12 15:14:28,276 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=74870, PETRI_DIFFERENCE_MINUEND_PLACES=670, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1805, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=94695, PETRI_PLACES=779, PETRI_TRANSITIONS=2822} [2022-12-12 15:14:28,276 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 758 predicate places. [2022-12-12 15:14:28,276 INFO L495 AbstractCegarLoop]: Abstraction has has 779 places, 2822 transitions, 94695 flow [2022-12-12 15:14:28,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 44 states have internal predecessors, (71), 0 states have call successors, (0), 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 15:14:28,277 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:14:28,277 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:14:28,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-12-12 15:14:28,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:14:28,482 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 15:14:28,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:14:28,483 INFO L85 PathProgramCache]: Analyzing trace with hash -2137945403, now seen corresponding path program 21 times [2022-12-12 15:14:28,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:14:28,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419392659] [2022-12-12 15:14:28,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:14:28,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:14:28,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:14:28,891 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:14:28,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:14:28,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419392659] [2022-12-12 15:14:28,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419392659] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:14:28,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545714917] [2022-12-12 15:14:28,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 15:14:28,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:14:28,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:14:28,893 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:14:28,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-12-12 15:14:29,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-12 15:14:29,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:14:29,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-12 15:14:29,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:14:29,891 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:14:29,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:14:30,049 INFO L321 Elim1Store]: treesize reduction 34, result has 62.6 percent of original size [2022-12-12 15:14:30,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 64 [2022-12-12 15:14:30,911 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:14:30,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545714917] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:14:30,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:14:30,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 44 [2022-12-12 15:14:30,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057182683] [2022-12-12 15:14:30,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:14:30,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-12 15:14:30,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:14:30,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-12 15:14:30,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1702, Unknown=0, NotChecked=0, Total=1980 [2022-12-12 15:14:30,912 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-12 15:14:30,912 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 779 places, 2822 transitions, 94695 flow. Second operand has 45 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 44 states have internal predecessors, (71), 0 states have call successors, (0), 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 15:14:30,912 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:14:30,912 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-12 15:14:30,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:15:06,977 INFO L130 PetriNetUnfolder]: 16920/30583 cut-off events. [2022-12-12 15:15:06,977 INFO L131 PetriNetUnfolder]: For 15254692/15254692 co-relation queries the response was YES. [2022-12-12 15:15:07,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 716011 conditions, 30583 events. 16920/30583 cut-off events. For 15254692/15254692 co-relation queries the response was YES. Maximal size of possible extension queue 1716. Compared 275449 event pairs, 1411 based on Foata normal form. 260/30843 useless extension candidates. Maximal degree in co-relation 715711. Up to 9325 conditions per place. [2022-12-12 15:15:08,067 INFO L137 encePairwiseOnDemand]: 7/19 looper letters, 1491 selfloop transitions, 2952 changer transitions 43/4486 dead transitions. [2022-12-12 15:15:08,067 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 851 places, 4486 transitions, 163083 flow [2022-12-12 15:15:08,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-12-12 15:15:08,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2022-12-12 15:15:08,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 495 transitions. [2022-12-12 15:15:08,068 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3138871274571972 [2022-12-12 15:15:08,068 INFO L175 Difference]: Start difference. First operand has 779 places, 2822 transitions, 94695 flow. Second operand 83 states and 495 transitions. [2022-12-12 15:15:08,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 851 places, 4486 transitions, 163083 flow Received shutdown request... [2022-12-12 15:16:15,564 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-12-12 15:16:15,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-12-12 15:16:15,603 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 15:16:15,603 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 15:16:15,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2022-12-12 15:16:15,770 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2022-12-12 15:16:15,771 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-12-12 15:16:15,772 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-12-12 15:16:15,772 INFO L445 BasicCegarLoop]: Path program histogram: [36, 21, 6, 6, 1, 1, 1, 1] [2022-12-12 15:16:15,774 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-12 15:16:15,774 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-12 15:16:15,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.12 03:16:15 BasicIcfg [2022-12-12 15:16:15,775 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-12 15:16:15,775 INFO L158 Benchmark]: Toolchain (without parser) took 825331.81ms. Allocated memory was 222.3MB in the beginning and 7.0GB in the end (delta: 6.8GB). Free memory was 198.3MB in the beginning and 1.0GB in the end (delta: -844.6MB). Peak memory consumption was 6.4GB. Max. memory is 8.0GB. [2022-12-12 15:16:15,776 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 222.3MB. Free memory was 198.5MB in the beginning and 198.3MB in the end (delta: 167.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-12-12 15:16:15,776 INFO L158 Benchmark]: CACSL2BoogieTranslator took 209.67ms. Allocated memory is still 222.3MB. Free memory was 198.3MB in the beginning and 186.8MB in the end (delta: 11.4MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-12-12 15:16:15,776 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.44ms. Allocated memory is still 222.3MB. Free memory was 186.8MB in the beginning and 184.9MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-12 15:16:15,776 INFO L158 Benchmark]: Boogie Preprocessor took 32.09ms. Allocated memory is still 222.3MB. Free memory was 184.9MB in the beginning and 183.3MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-12-12 15:16:15,776 INFO L158 Benchmark]: RCFGBuilder took 402.78ms. Allocated memory is still 222.3MB. Free memory was 183.3MB in the beginning and 167.0MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. [2022-12-12 15:16:15,776 INFO L158 Benchmark]: TraceAbstraction took 824642.70ms. Allocated memory was 222.3MB in the beginning and 7.0GB in the end (delta: 6.8GB). Free memory was 166.0MB in the beginning and 1.0GB in the end (delta: -876.9MB). Peak memory consumption was 6.3GB. Max. memory is 8.0GB. [2022-12-12 15:16:15,776 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 222.3MB. Free memory was 198.5MB in the beginning and 198.3MB in the end (delta: 167.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 209.67ms. Allocated memory is still 222.3MB. Free memory was 198.3MB in the beginning and 186.8MB in the end (delta: 11.4MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 39.44ms. Allocated memory is still 222.3MB. Free memory was 186.8MB in the beginning and 184.9MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 32.09ms. Allocated memory is still 222.3MB. Free memory was 184.9MB in the beginning and 183.3MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 402.78ms. Allocated memory is still 222.3MB. Free memory was 183.3MB in the beginning and 167.0MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. * TraceAbstraction took 824642.70ms. Allocated memory was 222.3MB in the beginning and 7.0GB in the end (delta: 6.8GB). Free memory was 166.0MB in the beginning and 1.0GB in the end (delta: -876.9MB). Peak memory consumption was 6.3GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.1s, 141 PlacesBefore, 21 PlacesAfterwards, 149 TransitionsBefore, 19 TransitionsAfterwards, 992 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 90 TrivialYvCompositions, 30 ConcurrentYvCompositions, 9 ChoiceCompositions, 129 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 627, independent: 615, independent conditional: 615, independent unconditional: 0, dependent: 12, dependent conditional: 12, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 627, independent: 615, independent conditional: 0, independent unconditional: 615, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 627, independent: 615, independent conditional: 0, independent unconditional: 615, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 627, independent: 615, independent conditional: 0, independent unconditional: 615, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 581, independent: 575, independent conditional: 0, independent unconditional: 575, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 581, independent: 575, independent conditional: 0, independent unconditional: 575, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 6, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 22, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 22, dependent conditional: 0, dependent unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 627, independent: 40, independent conditional: 0, independent unconditional: 40, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 581, unknown conditional: 0, unknown unconditional: 581] , Statistics on independence cache: Total cache size (in pairs): 1006, Positive cache size: 1000, Positive conditional cache size: 0, Positive unconditional cache size: 1000, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1 - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 79]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 175 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: 824.5s, OverallIterations: 73, TraceHistogramMax: 3, PathProgramHistogramMax: 36, EmptinessCheckTime: 0.0s, AutomataDifference: 681.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.3s, HoareTripleCheckerStatistics: 171 mSolverCounterUnknown, 11905 SdHoareTripleChecker+Valid, 47.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 11905 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 43.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 444 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1834 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 60496 IncrementalHoareTripleChecker+Invalid, 62945 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1834 mSolverCounterUnsat, 0 mSDtfsCounter, 60496 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4639 GetRequests, 1941 SyntacticMatches, 59 SemanticMatches, 2639 ConstructedPredicates, 9 IntricatePredicates, 2 DeprecatedPredicates, 28254 ImplicationChecksByTransitivity, 145.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94695occurred in iteration=72, InterpolantAutomatonStates: 1462, 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: 0.8s SsaConstructionTime, 4.0s SatisfiabilityAnalysisTime, 113.7s InterpolantComputationTime, 3121 NumberOfCodeBlocks, 3121 NumberOfCodeBlocksAsserted, 232 NumberOfCheckSat, 4414 ConstructedInterpolants, 149 QuantifiedInterpolants, 68043 SizeOfPredicates, 868 NumberOfNonLiveVariables, 15484 ConjunctsInSsa, 1750 ConjunctsInUnsatCore, 203 InterpolantComputations, 12 PerfectInterpolantSequences, 1262/2839 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