/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --traceabstraction.use.on-demand.petri.net.difference true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-sum-array-hom.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 20:30:49,854 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 20:30:49,855 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 20:30:49,876 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 20:30:49,877 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 20:30:49,877 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 20:30:49,878 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 20:30:49,880 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 20:30:49,881 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 20:30:49,881 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 20:30:49,882 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 20:30:49,883 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 20:30:49,883 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 20:30:49,884 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 20:30:49,885 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 20:30:49,885 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 20:30:49,886 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 20:30:49,886 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 20:30:49,888 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 20:30:49,889 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 20:30:49,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 20:30:49,895 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 20:30:49,904 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 20:30:49,905 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 20:30:49,907 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 20:30:49,908 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 20:30:49,908 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 20:30:49,908 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 20:30:49,909 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 20:30:49,909 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 20:30:49,909 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 20:30:49,910 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 20:30:49,910 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 20:30:49,911 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 20:30:49,911 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 20:30:49,911 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 20:30:49,912 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 20:30:49,912 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 20:30:49,912 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 20:30:49,913 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 20:30:49,913 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 20:30:49,914 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2022-12-12 20:30:49,937 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 20:30:49,937 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 20:30:49,938 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 20:30:49,938 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 20:30:49,938 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 20:30:49,938 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 20:30:49,938 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 20:30:49,938 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 20:30:49,938 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 20:30:49,939 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 20:30:49,939 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 20:30:49,939 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 20:30:49,939 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 20:30:49,939 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 20:30:49,939 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 20:30:49,939 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 20:30:49,939 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 20:30:49,939 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 20:30:49,940 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 20:30:49,940 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 20:30:49,940 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 20:30:49,940 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 20:30:49,940 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 20:30:49,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 20:30:49,940 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 20:30:49,940 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 20:30:49,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 20:30:49,941 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 20:30:49,941 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 20:30:49,941 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 20:30:49,941 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use on-demand Petri net difference -> true [2022-12-12 20:30:50,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 20:30:50,190 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 20:30:50,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 20:30:50,192 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 20:30:50,192 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 20:30:50,193 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-sum-array-hom.wvr.c [2022-12-12 20:30:51,169 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 20:30:51,315 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 20:30:51,315 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sum-array-hom.wvr.c [2022-12-12 20:30:51,320 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e30f3eca/68a9c5a1d85a4d08be4bd002b85e25ce/FLAGfa1b81615 [2022-12-12 20:30:51,333 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e30f3eca/68a9c5a1d85a4d08be4bd002b85e25ce [2022-12-12 20:30:51,335 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 20:30:51,336 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 20:30:51,338 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 20:30:51,338 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 20:30:51,340 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 20:30:51,340 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 08:30:51" (1/1) ... [2022-12-12 20:30:51,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55431240 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:30:51, skipping insertion in model container [2022-12-12 20:30:51,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 08:30:51" (1/1) ... [2022-12-12 20:30:51,345 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 20:30:51,362 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 20:30:51,516 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sum-array-hom.wvr.c[2396,2409] [2022-12-12 20:30:51,528 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 20:30:51,535 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 20:30:51,563 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sum-array-hom.wvr.c[2396,2409] [2022-12-12 20:30:51,566 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 20:30:51,577 INFO L208 MainTranslator]: Completed translation [2022-12-12 20:30:51,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:30:51 WrapperNode [2022-12-12 20:30:51,578 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 20:30:51,580 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 20:30:51,580 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 20:30:51,580 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 20:30:51,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:30:51" (1/1) ... [2022-12-12 20:30:51,598 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:30:51" (1/1) ... [2022-12-12 20:30:51,619 INFO L138 Inliner]: procedures = 25, calls = 34, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 102 [2022-12-12 20:30:51,620 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 20:30:51,620 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 20:30:51,620 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 20:30:51,620 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 20:30:51,626 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:30:51" (1/1) ... [2022-12-12 20:30:51,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:30:51" (1/1) ... [2022-12-12 20:30:51,638 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:30:51" (1/1) ... [2022-12-12 20:30:51,638 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:30:51" (1/1) ... [2022-12-12 20:30:51,648 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:30:51" (1/1) ... [2022-12-12 20:30:51,650 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:30:51" (1/1) ... [2022-12-12 20:30:51,651 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:30:51" (1/1) ... [2022-12-12 20:30:51,652 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:30:51" (1/1) ... [2022-12-12 20:30:51,653 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 20:30:51,654 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 20:30:51,654 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 20:30:51,654 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 20:30:51,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:30:51" (1/1) ... [2022-12-12 20:30:51,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 20:30:51,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:30:51,682 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-12 20:30:51,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-12 20:30:51,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 20:30:51,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 20:30:51,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 20:30:51,739 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-12 20:30:51,740 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-12 20:30:51,740 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-12 20:30:51,740 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-12 20:30:51,740 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-12 20:30:51,740 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-12 20:30:51,740 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-12 20:30:51,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 20:30:51,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-12 20:30:51,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 20:30:51,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 20:30:51,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 20:30:51,741 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-12 20:30:51,838 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 20:30:51,839 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 20:30:52,062 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 20:30:52,069 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 20:30:52,069 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-12 20:30:52,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 08:30:52 BoogieIcfgContainer [2022-12-12 20:30:52,070 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 20:30:52,072 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 20:30:52,072 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 20:30:52,074 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 20:30:52,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 08:30:51" (1/3) ... [2022-12-12 20:30:52,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4badc523 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 08:30:52, skipping insertion in model container [2022-12-12 20:30:52,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:30:51" (2/3) ... [2022-12-12 20:30:52,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4badc523 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 08:30:52, skipping insertion in model container [2022-12-12 20:30:52,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 08:30:52" (3/3) ... [2022-12-12 20:30:52,076 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sum-array-hom.wvr.c [2022-12-12 20:30:52,088 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 20:30:52,088 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 20:30:52,089 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 20:30:52,144 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-12 20:30:52,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 148 transitions, 320 flow [2022-12-12 20:30:52,236 INFO L130 PetriNetUnfolder]: 12/145 cut-off events. [2022-12-12 20:30:52,236 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 20:30:52,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 145 events. 12/145 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 100 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 107. Up to 2 conditions per place. [2022-12-12 20:30:52,242 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 148 transitions, 320 flow [2022-12-12 20:30:52,248 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 135 transitions, 288 flow [2022-12-12 20:30:52,249 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-12 20:30:52,262 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 135 transitions, 288 flow [2022-12-12 20:30:52,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 135 transitions, 288 flow [2022-12-12 20:30:52,293 INFO L130 PetriNetUnfolder]: 12/135 cut-off events. [2022-12-12 20:30:52,293 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 20:30:52,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 135 events. 12/135 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 101 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 107. Up to 2 conditions per place. [2022-12-12 20:30:52,296 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 135 transitions, 288 flow [2022-12-12 20:30:52,296 INFO L226 LiptonReduction]: Number of co-enabled transitions 1728 [2022-12-12 20:30:56,496 INFO L241 LiptonReduction]: Total number of compositions: 111 [2022-12-12 20:30:56,507 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 20:30:56,511 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;@373aacff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 20:30:56,511 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-12 20:30:56,516 INFO L130 PetriNetUnfolder]: 4/23 cut-off events. [2022-12-12 20:30:56,516 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 20:30:56,516 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:30:56,517 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:30:56,517 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:30:56,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:30:56,520 INFO L85 PathProgramCache]: Analyzing trace with hash 2027454459, now seen corresponding path program 1 times [2022-12-12 20:30:56,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:30:56,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648119006] [2022-12-12 20:30:56,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:30:56,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:30:56,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:30:57,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:30:57,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:30:57,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648119006] [2022-12-12 20:30:57,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648119006] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 20:30:57,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 20:30:57,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-12 20:30:57,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036123307] [2022-12-12 20:30:57,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 20:30:57,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 20:30:57,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:30:57,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 20:30:57,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 20:30:57,055 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2022-12-12 20:30:57,056 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:30:57,056 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:30:57,056 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2022-12-12 20:30:57,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:30:57,170 INFO L130 PetriNetUnfolder]: 360/508 cut-off events. [2022-12-12 20:30:57,170 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-12-12 20:30:57,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1068 conditions, 508 events. 360/508 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1619 event pairs, 39 based on Foata normal form. 1/306 useless extension candidates. Maximal degree in co-relation 803. Up to 421 conditions per place. [2022-12-12 20:30:57,174 INFO L137 encePairwiseOnDemand]: 19/24 looper letters, 32 selfloop transitions, 4 changer transitions 1/40 dead transitions. [2022-12-12 20:30:57,174 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 40 transitions, 187 flow [2022-12-12 20:30:57,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 20:30:57,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 20:30:57,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 47 transitions. [2022-12-12 20:30:57,194 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6527777777777778 [2022-12-12 20:30:57,196 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2022-12-12 20:30:57,197 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 40 transitions, 187 flow [2022-12-12 20:30:57,199 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 39 transitions, 180 flow [2022-12-12 20:30:57,199 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 39 transitions, 180 flow [2022-12-12 20:30:57,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:30:57,200 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:30:57,200 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:30:57,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 20:30:57,200 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:30:57,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:30:57,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1702965316, now seen corresponding path program 1 times [2022-12-12 20:30:57,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:30:57,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048721830] [2022-12-12 20:30:57,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:30:57,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:30:57,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:30:57,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:30:57,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:30:57,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048721830] [2022-12-12 20:30:57,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048721830] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 20:30:57,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 20:30:57,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 20:30:57,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764768362] [2022-12-12 20:30:57,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 20:30:57,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 20:30:57,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:30:57,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 20:30:57,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-12 20:30:57,354 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 24 [2022-12-12 20:30:57,354 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 39 transitions, 180 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:30:57,354 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:30:57,354 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 24 [2022-12-12 20:30:57,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:30:57,534 INFO L130 PetriNetUnfolder]: 675/985 cut-off events. [2022-12-12 20:30:57,534 INFO L131 PetriNetUnfolder]: For 248/248 co-relation queries the response was YES. [2022-12-12 20:30:57,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2985 conditions, 985 events. 675/985 cut-off events. For 248/248 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4035 event pairs, 66 based on Foata normal form. 0/667 useless extension candidates. Maximal degree in co-relation 1193. Up to 705 conditions per place. [2022-12-12 20:30:57,540 INFO L137 encePairwiseOnDemand]: 18/24 looper letters, 95 selfloop transitions, 6 changer transitions 6/109 dead transitions. [2022-12-12 20:30:57,540 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 109 transitions, 726 flow [2022-12-12 20:30:57,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 20:30:57,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 20:30:57,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 73 transitions. [2022-12-12 20:30:57,542 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5069444444444444 [2022-12-12 20:30:57,542 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2022-12-12 20:30:57,542 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 109 transitions, 726 flow [2022-12-12 20:30:57,547 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 103 transitions, 681 flow [2022-12-12 20:30:57,547 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 103 transitions, 681 flow [2022-12-12 20:30:57,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:30:57,547 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:30:57,547 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:30:57,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-12 20:30:57,547 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:30:57,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:30:57,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1090128332, now seen corresponding path program 1 times [2022-12-12 20:30:57,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:30:57,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576178253] [2022-12-12 20:30:57,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:30:57,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:30:57,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:30:57,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:30:57,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:30:57,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576178253] [2022-12-12 20:30:57,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576178253] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 20:30:57,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 20:30:57,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 20:30:57,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451749535] [2022-12-12 20:30:57,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 20:30:57,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 20:30:57,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:30:57,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 20:30:57,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 20:30:57,639 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 20:30:57,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 103 transitions, 681 flow. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:30:57,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:30:57,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 20:30:57,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:30:57,753 INFO L130 PetriNetUnfolder]: 621/949 cut-off events. [2022-12-12 20:30:57,754 INFO L131 PetriNetUnfolder]: For 467/467 co-relation queries the response was YES. [2022-12-12 20:30:57,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3649 conditions, 949 events. 621/949 cut-off events. For 467/467 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4030 event pairs, 92 based on Foata normal form. 0/725 useless extension candidates. Maximal degree in co-relation 1649. Up to 565 conditions per place. [2022-12-12 20:30:57,759 INFO L137 encePairwiseOnDemand]: 19/24 looper letters, 110 selfloop transitions, 4 changer transitions 12/127 dead transitions. [2022-12-12 20:30:57,759 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 127 transitions, 1089 flow [2022-12-12 20:30:57,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 20:30:57,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 20:30:57,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 58 transitions. [2022-12-12 20:30:57,760 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2022-12-12 20:30:57,761 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 11 predicate places. [2022-12-12 20:30:57,761 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 127 transitions, 1089 flow [2022-12-12 20:30:57,765 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 115 transitions, 981 flow [2022-12-12 20:30:57,765 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 115 transitions, 981 flow [2022-12-12 20:30:57,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:30:57,765 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:30:57,766 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:30:57,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-12 20:30:57,766 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:30:57,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:30:57,766 INFO L85 PathProgramCache]: Analyzing trace with hash -2141966486, now seen corresponding path program 1 times [2022-12-12 20:30:57,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:30:57,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593270461] [2022-12-12 20:30:57,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:30:57,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:30:57,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:30:57,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:30:57,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:30:57,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593270461] [2022-12-12 20:30:57,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593270461] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 20:30:57,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 20:30:57,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 20:30:57,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57009907] [2022-12-12 20:30:57,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 20:30:57,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 20:30:57,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:30:57,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 20:30:57,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 20:30:57,832 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 24 [2022-12-12 20:30:57,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 115 transitions, 981 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:30:57,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:30:57,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 24 [2022-12-12 20:30:57,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:30:57,957 INFO L130 PetriNetUnfolder]: 482/736 cut-off events. [2022-12-12 20:30:57,958 INFO L131 PetriNetUnfolder]: For 609/621 co-relation queries the response was YES. [2022-12-12 20:30:57,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3305 conditions, 736 events. 482/736 cut-off events. For 609/621 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2634 event pairs, 131 based on Foata normal form. 48/618 useless extension candidates. Maximal degree in co-relation 2159. Up to 584 conditions per place. [2022-12-12 20:30:57,962 INFO L137 encePairwiseOnDemand]: 19/24 looper letters, 52 selfloop transitions, 2 changer transitions 34/90 dead transitions. [2022-12-12 20:30:57,962 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 90 transitions, 924 flow [2022-12-12 20:30:57,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 20:30:57,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 20:30:57,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 51 transitions. [2022-12-12 20:30:57,963 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.425 [2022-12-12 20:30:57,963 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 15 predicate places. [2022-12-12 20:30:57,963 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 90 transitions, 924 flow [2022-12-12 20:30:57,966 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 56 transitions, 583 flow [2022-12-12 20:30:57,966 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 56 transitions, 583 flow [2022-12-12 20:30:57,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:30:57,966 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:30:57,966 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:30:57,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-12 20:30:57,966 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:30:57,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:30:57,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1594356336, now seen corresponding path program 1 times [2022-12-12 20:30:57,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:30:57,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518955851] [2022-12-12 20:30:57,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:30:57,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:30:57,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:30:58,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:30:58,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:30:58,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518955851] [2022-12-12 20:30:58,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518955851] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:30:58,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338783285] [2022-12-12 20:30:58,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:30:58,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:30:58,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:30:58,035 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:30:58,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-12 20:30:58,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:30:58,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 20:30:58,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:30:58,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:30:58,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:30:58,227 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 20:30:58,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338783285] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 20:30:58,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 20:30:58,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2022-12-12 20:30:58,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390530678] [2022-12-12 20:30:58,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 20:30:58,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 20:30:58,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:30:58,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 20:30:58,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-12 20:30:58,229 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 24 [2022-12-12 20:30:58,229 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 56 transitions, 583 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:30:58,229 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:30:58,229 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 24 [2022-12-12 20:30:58,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:30:58,294 INFO L130 PetriNetUnfolder]: 365/535 cut-off events. [2022-12-12 20:30:58,295 INFO L131 PetriNetUnfolder]: For 767/813 co-relation queries the response was YES. [2022-12-12 20:30:58,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2928 conditions, 535 events. 365/535 cut-off events. For 767/813 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1759 event pairs, 61 based on Foata normal form. 6/412 useless extension candidates. Maximal degree in co-relation 2707. Up to 495 conditions per place. [2022-12-12 20:30:58,298 INFO L137 encePairwiseOnDemand]: 19/24 looper letters, 63 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2022-12-12 20:30:58,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 72 transitions, 883 flow [2022-12-12 20:30:58,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 20:30:58,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 20:30:58,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 44 transitions. [2022-12-12 20:30:58,299 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2022-12-12 20:30:58,300 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 13 predicate places. [2022-12-12 20:30:58,300 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 72 transitions, 883 flow [2022-12-12 20:30:58,302 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 72 transitions, 883 flow [2022-12-12 20:30:58,303 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 72 transitions, 883 flow [2022-12-12 20:30:58,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:30:58,303 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:30:58,303 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:30:58,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-12-12 20:30:58,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:30:58,510 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:30:58,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:30:58,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1587764516, now seen corresponding path program 1 times [2022-12-12 20:30:58,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:30:58,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265277748] [2022-12-12 20:30:58,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:30:58,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:30:58,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:30:58,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:30:58,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:30:58,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265277748] [2022-12-12 20:30:58,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265277748] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:30:58,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395879704] [2022-12-12 20:30:58,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:30:58,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:30:58,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:30:58,598 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:30:58,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-12 20:30:58,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:30:58,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 20:30:58,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:30:58,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:30:58,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:30:58,813 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 20:30:58,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395879704] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 20:30:58,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 20:30:58,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2022-12-12 20:30:58,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859341959] [2022-12-12 20:30:58,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 20:30:58,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 20:30:58,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:30:58,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 20:30:58,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-12-12 20:30:58,815 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 20:30:58,815 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 72 transitions, 883 flow. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:30:58,815 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:30:58,815 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 20:30:58,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:30:58,994 INFO L130 PetriNetUnfolder]: 563/813 cut-off events. [2022-12-12 20:30:58,994 INFO L131 PetriNetUnfolder]: For 2028/2123 co-relation queries the response was YES. [2022-12-12 20:30:58,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5348 conditions, 813 events. 563/813 cut-off events. For 2028/2123 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2916 event pairs, 45 based on Foata normal form. 6/606 useless extension candidates. Maximal degree in co-relation 4968. Up to 774 conditions per place. [2022-12-12 20:30:59,000 INFO L137 encePairwiseOnDemand]: 16/24 looper letters, 145 selfloop transitions, 23 changer transitions 0/169 dead transitions. [2022-12-12 20:30:59,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 169 transitions, 2416 flow [2022-12-12 20:30:59,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 20:30:59,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 20:30:59,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 66 transitions. [2022-12-12 20:30:59,002 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2022-12-12 20:30:59,004 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 19 predicate places. [2022-12-12 20:30:59,004 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 169 transitions, 2416 flow [2022-12-12 20:30:59,020 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 169 transitions, 2416 flow [2022-12-12 20:30:59,020 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 169 transitions, 2416 flow [2022-12-12 20:30:59,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:30:59,020 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:30:59,020 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:30:59,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-12 20:30:59,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-12 20:30:59,225 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:30:59,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:30:59,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1787865142, now seen corresponding path program 2 times [2022-12-12 20:30:59,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:30:59,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507276101] [2022-12-12 20:30:59,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:30:59,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:30:59,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:30:59,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:30:59,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:30:59,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507276101] [2022-12-12 20:30:59,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507276101] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:30:59,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744551543] [2022-12-12 20:30:59,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 20:30:59,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:30:59,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:30:59,325 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:30:59,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-12 20:30:59,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 20:30:59,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:30:59,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 20:30:59,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:30:59,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:30:59,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:30:59,547 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 20:30:59,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744551543] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 20:30:59,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 20:30:59,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2022-12-12 20:30:59,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144565772] [2022-12-12 20:30:59,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 20:30:59,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 20:30:59,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:30:59,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 20:30:59,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-12-12 20:30:59,552 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 20:30:59,552 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 169 transitions, 2416 flow. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:30:59,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:30:59,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 20:30:59,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:30:59,733 INFO L130 PetriNetUnfolder]: 837/1221 cut-off events. [2022-12-12 20:30:59,733 INFO L131 PetriNetUnfolder]: For 2486/2572 co-relation queries the response was YES. [2022-12-12 20:30:59,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9285 conditions, 1221 events. 837/1221 cut-off events. For 2486/2572 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4651 event pairs, 42 based on Foata normal form. 4/880 useless extension candidates. Maximal degree in co-relation 8620. Up to 1171 conditions per place. [2022-12-12 20:30:59,745 INFO L137 encePairwiseOnDemand]: 16/24 looper letters, 270 selfloop transitions, 37 changer transitions 0/308 dead transitions. [2022-12-12 20:30:59,745 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 308 transitions, 5025 flow [2022-12-12 20:30:59,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 20:30:59,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 20:30:59,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 65 transitions. [2022-12-12 20:30:59,753 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2022-12-12 20:30:59,754 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 25 predicate places. [2022-12-12 20:30:59,754 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 308 transitions, 5025 flow [2022-12-12 20:30:59,767 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 308 transitions, 5025 flow [2022-12-12 20:30:59,767 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 308 transitions, 5025 flow [2022-12-12 20:30:59,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:30:59,767 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:30:59,767 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:30:59,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-12 20:30:59,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:30:59,973 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:30:59,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:30:59,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1385546064, now seen corresponding path program 3 times [2022-12-12 20:30:59,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:30:59,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483177217] [2022-12-12 20:30:59,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:30:59,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:30:59,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:31:00,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:31:00,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:31:00,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483177217] [2022-12-12 20:31:00,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483177217] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:31:00,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434932740] [2022-12-12 20:31:00,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 20:31:00,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:31:00,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:31:00,104 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:31:00,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-12 20:31:00,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 20:31:00,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:31:00,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 20:31:00,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:31:00,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:31:00,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:31:00,328 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 20:31:00,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434932740] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 20:31:00,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 20:31:00,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2022-12-12 20:31:00,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169299609] [2022-12-12 20:31:00,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 20:31:00,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 20:31:00,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:31:00,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 20:31:00,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-12-12 20:31:00,330 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 20:31:00,330 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 308 transitions, 5025 flow. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:31:00,330 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:31:00,330 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 20:31:00,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:31:00,531 INFO L130 PetriNetUnfolder]: 840/1223 cut-off events. [2022-12-12 20:31:00,531 INFO L131 PetriNetUnfolder]: For 3596/3718 co-relation queries the response was YES. [2022-12-12 20:31:00,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10493 conditions, 1223 events. 840/1223 cut-off events. For 3596/3718 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4754 event pairs, 40 based on Foata normal form. 8/892 useless extension candidates. Maximal degree in co-relation 9766. Up to 1173 conditions per place. [2022-12-12 20:31:00,539 INFO L137 encePairwiseOnDemand]: 16/24 looper letters, 265 selfloop transitions, 39 changer transitions 0/305 dead transitions. [2022-12-12 20:31:00,539 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 305 transitions, 5585 flow [2022-12-12 20:31:00,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 20:31:00,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 20:31:00,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 69 transitions. [2022-12-12 20:31:00,540 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2022-12-12 20:31:00,542 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 31 predicate places. [2022-12-12 20:31:00,542 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 305 transitions, 5585 flow [2022-12-12 20:31:00,550 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 61 places, 305 transitions, 5585 flow [2022-12-12 20:31:00,551 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 305 transitions, 5585 flow [2022-12-12 20:31:00,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:31:00,551 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:31:00,551 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:31:00,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-12 20:31:00,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:31:00,756 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:31:00,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:31:00,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1410945294, now seen corresponding path program 4 times [2022-12-12 20:31:00,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:31:00,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601262362] [2022-12-12 20:31:00,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:31:00,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:31:00,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:31:00,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:31:00,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:31:00,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601262362] [2022-12-12 20:31:00,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601262362] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:31:00,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340227204] [2022-12-12 20:31:00,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 20:31:00,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:31:00,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:31:00,865 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:31:00,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-12 20:31:00,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 20:31:00,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:31:00,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 20:31:00,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:31:00,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:31:00,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:31:01,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:31:01,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340227204] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:31:01,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:31:01,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-12-12 20:31:01,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274792572] [2022-12-12 20:31:01,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:31:01,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-12 20:31:01,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:31:01,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-12 20:31:01,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-12-12 20:31:01,036 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 24 [2022-12-12 20:31:01,036 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 305 transitions, 5585 flow. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 20:31:01,036 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:31:01,036 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 24 [2022-12-12 20:31:01,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:31:01,395 INFO L130 PetriNetUnfolder]: 788/1161 cut-off events. [2022-12-12 20:31:01,395 INFO L131 PetriNetUnfolder]: For 3788/3788 co-relation queries the response was YES. [2022-12-12 20:31:01,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10904 conditions, 1161 events. 788/1161 cut-off events. For 3788/3788 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4362 event pairs, 40 based on Foata normal form. 0/858 useless extension candidates. Maximal degree in co-relation 10139. Up to 1091 conditions per place. [2022-12-12 20:31:01,402 INFO L137 encePairwiseOnDemand]: 15/24 looper letters, 282 selfloop transitions, 46 changer transitions 0/328 dead transitions. [2022-12-12 20:31:01,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 328 transitions, 6579 flow [2022-12-12 20:31:01,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-12 20:31:01,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-12 20:31:01,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 89 transitions. [2022-12-12 20:31:01,403 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3371212121212121 [2022-12-12 20:31:01,404 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 41 predicate places. [2022-12-12 20:31:01,404 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 328 transitions, 6579 flow [2022-12-12 20:31:01,411 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 328 transitions, 6579 flow [2022-12-12 20:31:01,411 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 328 transitions, 6579 flow [2022-12-12 20:31:01,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 20:31:01,412 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:31:01,412 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:31:01,419 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 20:31:01,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:31:01,617 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:31:01,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:31:01,618 INFO L85 PathProgramCache]: Analyzing trace with hash -614508594, now seen corresponding path program 5 times [2022-12-12 20:31:01,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:31:01,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118666603] [2022-12-12 20:31:01,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:31:01,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:31:01,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:31:01,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:31:01,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:31:01,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118666603] [2022-12-12 20:31:01,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118666603] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:31:01,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611780504] [2022-12-12 20:31:01,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 20:31:01,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:31:01,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:31:01,715 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:31:01,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-12 20:31:01,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 20:31:01,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:31:01,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 20:31:01,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:31:01,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:31:01,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:31:01,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:31:01,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611780504] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:31:01,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:31:01,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2022-12-12 20:31:01,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253046022] [2022-12-12 20:31:01,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:31:01,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-12 20:31:01,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:31:01,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-12 20:31:01,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-12-12 20:31:01,868 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 24 [2022-12-12 20:31:01,868 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 328 transitions, 6579 flow. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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 20:31:01,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:31:01,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 24 [2022-12-12 20:31:01,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:31:02,173 INFO L130 PetriNetUnfolder]: 802/1185 cut-off events. [2022-12-12 20:31:02,173 INFO L131 PetriNetUnfolder]: For 3319/3319 co-relation queries the response was YES. [2022-12-12 20:31:02,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12319 conditions, 1185 events. 802/1185 cut-off events. For 3319/3319 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4491 event pairs, 40 based on Foata normal form. 0/880 useless extension candidates. Maximal degree in co-relation 11478. Up to 1113 conditions per place. [2022-12-12 20:31:02,181 INFO L137 encePairwiseOnDemand]: 15/24 looper letters, 293 selfloop transitions, 53 changer transitions 0/346 dead transitions. [2022-12-12 20:31:02,181 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 346 transitions, 7558 flow [2022-12-12 20:31:02,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-12 20:31:02,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-12 20:31:02,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 83 transitions. [2022-12-12 20:31:02,182 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3143939393939394 [2022-12-12 20:31:02,182 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 51 predicate places. [2022-12-12 20:31:02,182 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 346 transitions, 7558 flow [2022-12-12 20:31:02,191 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 346 transitions, 7558 flow [2022-12-12 20:31:02,192 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 346 transitions, 7558 flow [2022-12-12 20:31:02,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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 20:31:02,192 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:31:02,192 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:31:02,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-12 20:31:02,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:31:02,399 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:31:02,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:31:02,400 INFO L85 PathProgramCache]: Analyzing trace with hash 262799962, now seen corresponding path program 6 times [2022-12-12 20:31:02,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:31:02,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567179962] [2022-12-12 20:31:02,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:31:02,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:31:02,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:31:02,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:31:02,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:31:02,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567179962] [2022-12-12 20:31:02,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567179962] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:31:02,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897798180] [2022-12-12 20:31:02,520 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 20:31:02,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:31:02,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:31:02,537 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:31:02,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-12 20:31:02,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 20:31:02,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:31:02,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 20:31:02,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:31:02,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:31:02,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:31:02,739 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 20:31:02,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897798180] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 20:31:02,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 20:31:02,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2022-12-12 20:31:02,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290532338] [2022-12-12 20:31:02,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 20:31:02,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 20:31:02,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:31:02,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 20:31:02,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-12-12 20:31:02,740 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 20:31:02,741 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 346 transitions, 7558 flow. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:31:02,741 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:31:02,741 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 20:31:02,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:31:02,926 INFO L130 PetriNetUnfolder]: 788/1157 cut-off events. [2022-12-12 20:31:02,926 INFO L131 PetriNetUnfolder]: For 3767/3767 co-relation queries the response was YES. [2022-12-12 20:31:02,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13108 conditions, 1157 events. 788/1157 cut-off events. For 3767/3767 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4310 event pairs, 40 based on Foata normal form. 0/864 useless extension candidates. Maximal degree in co-relation 12243. Up to 1087 conditions per place. [2022-12-12 20:31:02,934 INFO L137 encePairwiseOnDemand]: 16/24 looper letters, 278 selfloop transitions, 44 changer transitions 0/331 dead transitions. [2022-12-12 20:31:02,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 331 transitions, 7863 flow [2022-12-12 20:31:02,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 20:31:02,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 20:31:02,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 63 transitions. [2022-12-12 20:31:02,936 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.375 [2022-12-12 20:31:02,936 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 57 predicate places. [2022-12-12 20:31:02,936 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 331 transitions, 7863 flow [2022-12-12 20:31:02,945 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 331 transitions, 7863 flow [2022-12-12 20:31:02,946 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 331 transitions, 7863 flow [2022-12-12 20:31:02,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:31:02,946 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:31:02,946 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:31:02,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-12 20:31:03,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:31:03,153 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:31:03,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:31:03,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1153803537, now seen corresponding path program 1 times [2022-12-12 20:31:03,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:31:03,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925591011] [2022-12-12 20:31:03,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:31:03,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:31:03,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:31:04,110 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 20:31:04,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:31:04,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925591011] [2022-12-12 20:31:04,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925591011] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:31:04,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989758089] [2022-12-12 20:31:04,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:31:04,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:31:04,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:31:04,112 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:31:04,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-12 20:31:04,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:31:04,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-12 20:31:04,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:31:04,437 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:31:04,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-12-12 20:31:04,575 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 20:31:04,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:31:04,760 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:31:04,761 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 28 treesize of output 25 [2022-12-12 20:31:04,988 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 20:31:04,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989758089] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:31:04,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:31:04,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 8] total 25 [2022-12-12 20:31:04,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976137708] [2022-12-12 20:31:04,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:31:04,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-12 20:31:04,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:31:04,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-12 20:31:04,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2022-12-12 20:31:04,991 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 20:31:04,991 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 331 transitions, 7863 flow. Second operand has 27 states, 27 states have (on average 3.3703703703703702) internal successors, (91), 27 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:31:04,991 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:31:04,991 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 20:31:04,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:31:06,767 INFO L130 PetriNetUnfolder]: 1567/2350 cut-off events. [2022-12-12 20:31:06,767 INFO L131 PetriNetUnfolder]: For 6656/6656 co-relation queries the response was YES. [2022-12-12 20:31:06,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28996 conditions, 2350 events. 1567/2350 cut-off events. For 6656/6656 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 10530 event pairs, 14 based on Foata normal form. 2/1770 useless extension candidates. Maximal degree in co-relation 23721. Up to 2238 conditions per place. [2022-12-12 20:31:06,783 INFO L137 encePairwiseOnDemand]: 11/24 looper letters, 537 selfloop transitions, 248 changer transitions 12/803 dead transitions. [2022-12-12 20:31:06,783 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 803 transitions, 20649 flow [2022-12-12 20:31:06,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-12 20:31:06,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-12 20:31:06,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 187 transitions. [2022-12-12 20:31:06,785 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.37103174603174605 [2022-12-12 20:31:06,785 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 77 predicate places. [2022-12-12 20:31:06,785 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 803 transitions, 20649 flow [2022-12-12 20:31:06,805 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 791 transitions, 20319 flow [2022-12-12 20:31:06,806 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 791 transitions, 20319 flow [2022-12-12 20:31:06,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.3703703703703702) internal successors, (91), 27 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:31:06,806 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:31:06,806 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:31:06,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-12 20:31:07,012 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,SelfDestructingSolverStorable11 [2022-12-12 20:31:07,013 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:31:07,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:31:07,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1274421109, now seen corresponding path program 1 times [2022-12-12 20:31:07,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:31:07,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349074965] [2022-12-12 20:31:07,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:31:07,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:31:07,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:31:07,516 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 20:31:07,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:31:07,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349074965] [2022-12-12 20:31:07,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349074965] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:31:07,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933449561] [2022-12-12 20:31:07,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:31:07,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:31:07,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:31:07,518 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:31:07,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-12 20:31:07,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:31:07,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-12 20:31:07,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:31:07,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-12 20:31:07,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 20:31:07,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 20:31:07,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 20:31:07,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-12-12 20:31:07,812 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 20:31:07,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:31:07,906 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 20:31:07,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933449561] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:31:07,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:31:07,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 4] total 17 [2022-12-12 20:31:07,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682456587] [2022-12-12 20:31:07,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:31:07,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 20:31:07,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:31:07,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 20:31:07,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-12-12 20:31:07,907 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 20:31:07,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 791 transitions, 20319 flow. Second operand has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:31:07,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:31:07,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 20:31:07,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:31:08,697 INFO L130 PetriNetUnfolder]: 2227/3358 cut-off events. [2022-12-12 20:31:08,697 INFO L131 PetriNetUnfolder]: For 7689/7689 co-relation queries the response was YES. [2022-12-12 20:31:08,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45083 conditions, 3358 events. 2227/3358 cut-off events. For 7689/7689 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 16410 event pairs, 22 based on Foata normal form. 2/2520 useless extension candidates. Maximal degree in co-relation 31726. Up to 3246 conditions per place. [2022-12-12 20:31:08,767 INFO L137 encePairwiseOnDemand]: 14/24 looper letters, 845 selfloop transitions, 254 changer transitions 6/1124 dead transitions. [2022-12-12 20:31:08,767 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 1124 transitions, 31324 flow [2022-12-12 20:31:08,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 20:31:08,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 20:31:08,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 98 transitions. [2022-12-12 20:31:08,768 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2022-12-12 20:31:08,769 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 84 predicate places. [2022-12-12 20:31:08,769 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 1124 transitions, 31324 flow [2022-12-12 20:31:08,798 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 1118 transitions, 31144 flow [2022-12-12 20:31:08,799 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 1118 transitions, 31144 flow [2022-12-12 20:31:08,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:31:08,799 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:31:08,799 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:31:08,826 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 20:31:09,027 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,SelfDestructingSolverStorable12 [2022-12-12 20:31:09,027 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:31:09,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:31:09,028 INFO L85 PathProgramCache]: Analyzing trace with hash 976610431, now seen corresponding path program 2 times [2022-12-12 20:31:09,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:31:09,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868750071] [2022-12-12 20:31:09,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:31:09,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:31:09,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:31:09,563 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 20:31:09,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:31:09,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868750071] [2022-12-12 20:31:09,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868750071] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:31:09,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468860513] [2022-12-12 20:31:09,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 20:31:09,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:31:09,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:31:09,565 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:31:09,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-12 20:31:09,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 20:31:09,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:31:09,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-12 20:31:09,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:31:09,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:31:09,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 20:31:09,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-12-12 20:31:09,944 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 20:31:09,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:31:10,058 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:31:10,059 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 56 treesize of output 46 [2022-12-12 20:31:10,062 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 18 treesize of output 16 [2022-12-12 20:31:10,171 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 20:31:10,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468860513] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:31:10,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:31:10,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2022-12-12 20:31:10,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555108026] [2022-12-12 20:31:10,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:31:10,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-12 20:31:10,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:31:10,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-12 20:31:10,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=405, Unknown=6, NotChecked=0, Total=506 [2022-12-12 20:31:10,173 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 20:31:10,173 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 1118 transitions, 31144 flow. Second operand has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:31:10,173 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:31:10,173 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 20:31:10,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:31:11,312 INFO L130 PetriNetUnfolder]: 2621/3948 cut-off events. [2022-12-12 20:31:11,313 INFO L131 PetriNetUnfolder]: For 12602/12602 co-relation queries the response was YES. [2022-12-12 20:31:11,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56868 conditions, 3948 events. 2621/3948 cut-off events. For 12602/12602 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 20049 event pairs, 18 based on Foata normal form. 2/2951 useless extension candidates. Maximal degree in co-relation 38198. Up to 3836 conditions per place. [2022-12-12 20:31:11,341 INFO L137 encePairwiseOnDemand]: 15/24 looper letters, 985 selfloop transitions, 293 changer transitions 6/1303 dead transitions. [2022-12-12 20:31:11,341 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 1303 transitions, 38988 flow [2022-12-12 20:31:11,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 20:31:11,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 20:31:11,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 98 transitions. [2022-12-12 20:31:11,342 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2022-12-12 20:31:11,342 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 91 predicate places. [2022-12-12 20:31:11,342 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 1303 transitions, 38988 flow [2022-12-12 20:31:11,376 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 1297 transitions, 38796 flow [2022-12-12 20:31:11,377 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 1297 transitions, 38796 flow [2022-12-12 20:31:11,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:31:11,377 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:31:11,377 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:31:11,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-12 20:31:11,582 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,SelfDestructingSolverStorable13 [2022-12-12 20:31:11,582 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:31:11,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:31:11,582 INFO L85 PathProgramCache]: Analyzing trace with hash -2092097545, now seen corresponding path program 2 times [2022-12-12 20:31:11,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:31:11,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159486805] [2022-12-12 20:31:11,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:31:11,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:31:11,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:31:12,528 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 20:31:12,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:31:12,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159486805] [2022-12-12 20:31:12,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159486805] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:31:12,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608093364] [2022-12-12 20:31:12,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 20:31:12,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:31:12,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:31:12,530 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:31:12,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-12 20:31:12,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 20:31:12,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:31:12,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-12 20:31:12,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:31:12,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:31:12,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 20:31:12,889 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:31:12,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-12-12 20:31:13,025 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 20:31:13,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:31:13,323 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:31:13,323 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 64 treesize of output 52 [2022-12-12 20:31:13,328 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 22 treesize of output 16 [2022-12-12 20:31:13,631 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 20:31:13,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608093364] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:31:13,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:31:13,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 32 [2022-12-12 20:31:13,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85044421] [2022-12-12 20:31:13,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:31:13,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-12 20:31:13,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:31:13,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-12 20:31:13,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=956, Unknown=1, NotChecked=0, Total=1122 [2022-12-12 20:31:13,633 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 24 [2022-12-12 20:31:13,633 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 1297 transitions, 38796 flow. Second operand has 34 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:31:13,633 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:31:13,633 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 24 [2022-12-12 20:31:13,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:31:18,644 INFO L130 PetriNetUnfolder]: 3965/6002 cut-off events. [2022-12-12 20:31:18,644 INFO L131 PetriNetUnfolder]: For 15760/15760 co-relation queries the response was YES. [2022-12-12 20:31:18,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93268 conditions, 6002 events. 3965/6002 cut-off events. For 15760/15760 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 33164 event pairs, 32 based on Foata normal form. 2/4374 useless extension candidates. Maximal degree in co-relation 58393. Up to 5890 conditions per place. [2022-12-12 20:31:18,716 INFO L137 encePairwiseOnDemand]: 10/24 looper letters, 1445 selfloop transitions, 562 changer transitions 30/2037 dead transitions. [2022-12-12 20:31:18,716 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 2037 transitions, 65136 flow [2022-12-12 20:31:18,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-12 20:31:18,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-12-12 20:31:18,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 381 transitions. [2022-12-12 20:31:18,718 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3239795918367347 [2022-12-12 20:31:18,719 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 139 predicate places. [2022-12-12 20:31:18,719 INFO L82 GeneralOperation]: Start removeDead. Operand has 169 places, 2037 transitions, 65136 flow [2022-12-12 20:31:18,847 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 169 places, 2007 transitions, 64140 flow [2022-12-12 20:31:18,847 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 2007 transitions, 64140 flow [2022-12-12 20:31:18,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:31:18,848 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:31:18,848 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:31:18,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-12 20:31:19,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-12 20:31:19,053 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:31:19,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:31:19,054 INFO L85 PathProgramCache]: Analyzing trace with hash -2135510791, now seen corresponding path program 3 times [2022-12-12 20:31:19,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:31:19,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494669456] [2022-12-12 20:31:19,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:31:19,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:31:19,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:31:19,378 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 20:31:19,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:31:19,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494669456] [2022-12-12 20:31:19,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494669456] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:31:19,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329097252] [2022-12-12 20:31:19,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 20:31:19,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:31:19,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:31:19,380 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:31:19,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-12 20:31:19,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 20:31:19,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:31:19,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-12 20:31:19,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:31:19,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-12-12 20:31:19,589 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 20:31:19,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:31:19,633 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:31:19,633 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 28 treesize of output 25 [2022-12-12 20:31:19,705 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 20:31:19,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329097252] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:31:19,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:31:19,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 11 [2022-12-12 20:31:19,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843812122] [2022-12-12 20:31:19,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:31:19,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-12 20:31:19,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:31:19,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-12 20:31:19,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-12-12 20:31:19,707 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 20:31:19,708 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 2007 transitions, 64140 flow. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 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 20:31:19,708 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:31:19,708 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 20:31:19,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:31:22,278 INFO L130 PetriNetUnfolder]: 4679/7104 cut-off events. [2022-12-12 20:31:22,278 INFO L131 PetriNetUnfolder]: For 22930/22930 co-relation queries the response was YES. [2022-12-12 20:31:22,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117564 conditions, 7104 events. 4679/7104 cut-off events. For 22930/22930 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 40873 event pairs, 34 based on Foata normal form. 4/5200 useless extension candidates. Maximal degree in co-relation 72785. Up to 6992 conditions per place. [2022-12-12 20:31:22,335 INFO L137 encePairwiseOnDemand]: 16/24 looper letters, 2120 selfloop transitions, 253 changer transitions 12/2410 dead transitions. [2022-12-12 20:31:22,335 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 2410 transitions, 82019 flow [2022-12-12 20:31:22,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 20:31:22,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 20:31:22,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 88 transitions. [2022-12-12 20:31:22,346 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2022-12-12 20:31:22,346 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 145 predicate places. [2022-12-12 20:31:22,346 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 2410 transitions, 82019 flow [2022-12-12 20:31:22,422 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 2398 transitions, 81587 flow [2022-12-12 20:31:22,422 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 2398 transitions, 81587 flow [2022-12-12 20:31:22,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 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 20:31:22,422 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:31:22,422 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:31:22,429 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 20:31:22,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-12 20:31:22,639 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:31:22,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:31:22,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1574709759, now seen corresponding path program 4 times [2022-12-12 20:31:22,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:31:22,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723814886] [2022-12-12 20:31:22,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:31:22,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:31:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:31:22,892 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 20:31:22,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:31:22,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723814886] [2022-12-12 20:31:22,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723814886] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:31:22,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056607504] [2022-12-12 20:31:22,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 20:31:22,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:31:22,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:31:22,894 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:31:22,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-12 20:31:22,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 20:31:22,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:31:22,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-12 20:31:22,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:31:23,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-12 20:31:23,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 20:31:23,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 20:31:23,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 20:31:23,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-12-12 20:31:23,286 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 20:31:23,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:31:23,363 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 20:31:23,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056607504] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:31:23,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:31:23,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 4] total 15 [2022-12-12 20:31:23,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726809174] [2022-12-12 20:31:23,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:31:23,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-12 20:31:23,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:31:23,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-12 20:31:23,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2022-12-12 20:31:23,366 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 20:31:23,366 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 2398 transitions, 81587 flow. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:31:23,366 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:31:23,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 20:31:23,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:31:26,276 INFO L130 PetriNetUnfolder]: 4841/7344 cut-off events. [2022-12-12 20:31:26,276 INFO L131 PetriNetUnfolder]: For 27978/27978 co-relation queries the response was YES. [2022-12-12 20:31:26,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128601 conditions, 7344 events. 4841/7344 cut-off events. For 27978/27978 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 42456 event pairs, 32 based on Foata normal form. 2/5362 useless extension candidates. Maximal degree in co-relation 80975. Up to 7232 conditions per place. [2022-12-12 20:31:26,326 INFO L137 encePairwiseOnDemand]: 15/24 looper letters, 2244 selfloop transitions, 185 changer transitions 6/2460 dead transitions. [2022-12-12 20:31:26,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 2460 transitions, 88601 flow [2022-12-12 20:31:26,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 20:31:26,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 20:31:26,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 85 transitions. [2022-12-12 20:31:26,327 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4427083333333333 [2022-12-12 20:31:26,327 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 152 predicate places. [2022-12-12 20:31:26,327 INFO L82 GeneralOperation]: Start removeDead. Operand has 182 places, 2460 transitions, 88601 flow [2022-12-12 20:31:26,393 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 182 places, 2454 transitions, 88373 flow [2022-12-12 20:31:26,393 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 2454 transitions, 88373 flow [2022-12-12 20:31:26,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:31:26,394 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:31:26,394 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:31:26,399 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 20:31:26,599 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,SelfDestructingSolverStorable16 [2022-12-12 20:31:26,599 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:31:26,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:31:26,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1695655877, now seen corresponding path program 3 times [2022-12-12 20:31:26,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:31:26,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060487941] [2022-12-12 20:31:26,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:31:26,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:31:26,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:31:27,214 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 20:31:27,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:31:27,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060487941] [2022-12-12 20:31:27,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060487941] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:31:27,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824421896] [2022-12-12 20:31:27,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 20:31:27,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:31:27,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:31:27,216 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:31:27,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-12 20:31:27,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-12 20:31:27,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:31:27,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-12 20:31:27,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:31:27,571 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:31:27,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-12-12 20:31:27,645 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 20:31:27,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:31:27,718 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:31:27,718 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 28 treesize of output 25 [2022-12-12 20:31:27,953 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 20:31:27,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824421896] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:31:27,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:31:27,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 29 [2022-12-12 20:31:27,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352129715] [2022-12-12 20:31:27,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:31:27,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-12 20:31:27,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:31:27,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-12 20:31:27,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=733, Unknown=0, NotChecked=0, Total=930 [2022-12-12 20:31:27,955 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 24 [2022-12-12 20:31:27,955 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 2454 transitions, 88373 flow. Second operand has 31 states, 30 states have (on average 2.3) internal successors, (69), 30 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 20:31:27,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:31:27,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 24 [2022-12-12 20:31:27,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:31:32,356 INFO L130 PetriNetUnfolder]: 4991/7573 cut-off events. [2022-12-12 20:31:32,356 INFO L131 PetriNetUnfolder]: For 29532/29532 co-relation queries the response was YES. [2022-12-12 20:31:32,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140199 conditions, 7573 events. 4991/7573 cut-off events. For 29532/29532 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 44007 event pairs, 35 based on Foata normal form. 1/5522 useless extension candidates. Maximal degree in co-relation 89863. Up to 7461 conditions per place. [2022-12-12 20:31:32,415 INFO L137 encePairwiseOnDemand]: 12/24 looper letters, 2331 selfloop transitions, 221 changer transitions 6/2558 dead transitions. [2022-12-12 20:31:32,415 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 2558 transitions, 97185 flow [2022-12-12 20:31:32,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-12 20:31:32,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-12 20:31:32,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 170 transitions. [2022-12-12 20:31:32,418 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3079710144927536 [2022-12-12 20:31:32,418 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 174 predicate places. [2022-12-12 20:31:32,418 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 2558 transitions, 97185 flow [2022-12-12 20:31:32,499 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 204 places, 2552 transitions, 96948 flow [2022-12-12 20:31:32,499 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 2552 transitions, 96948 flow [2022-12-12 20:31:32,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.3) internal successors, (69), 30 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 20:31:32,499 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:31:32,499 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:31:32,504 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 20:31:32,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:31:32,711 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:31:32,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:31:32,712 INFO L85 PathProgramCache]: Analyzing trace with hash 2010174847, now seen corresponding path program 4 times [2022-12-12 20:31:32,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:31:32,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688657140] [2022-12-12 20:31:32,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:31:32,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:31:32,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:31:33,235 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 20:31:33,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:31:33,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688657140] [2022-12-12 20:31:33,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688657140] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:31:33,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907998885] [2022-12-12 20:31:33,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 20:31:33,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:31:33,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:31:33,248 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:31:33,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-12 20:31:33,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 20:31:33,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:31:33,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-12 20:31:33,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:31:33,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-12 20:31:33,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 20:31:33,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 20:31:33,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 20:31:33,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 20:31:33,713 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:31:33,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-12-12 20:31:33,745 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 20:31:33,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:31:34,010 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 20:31:34,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907998885] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:31:34,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:31:34,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 7] total 29 [2022-12-12 20:31:34,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742269313] [2022-12-12 20:31:34,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:31:34,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-12 20:31:34,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:31:34,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-12 20:31:34,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2022-12-12 20:31:34,013 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 24 [2022-12-12 20:31:34,013 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 2552 transitions, 96948 flow. Second operand has 31 states, 30 states have (on average 2.3) internal successors, (69), 30 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 20:31:34,013 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:31:34,013 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 24 [2022-12-12 20:31:34,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:31:42,294 INFO L130 PetriNetUnfolder]: 6354/9975 cut-off events. [2022-12-12 20:31:42,295 INFO L131 PetriNetUnfolder]: For 36912/36912 co-relation queries the response was YES. [2022-12-12 20:31:42,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194907 conditions, 9975 events. 6354/9975 cut-off events. For 36912/36912 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 64049 event pairs, 15 based on Foata normal form. 3/7276 useless extension candidates. Maximal degree in co-relation 123289. Up to 9863 conditions per place. [2022-12-12 20:31:42,384 INFO L137 encePairwiseOnDemand]: 9/24 looper letters, 2742 selfloop transitions, 1085 changer transitions 67/3894 dead transitions. [2022-12-12 20:31:42,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 3894 transitions, 155812 flow [2022-12-12 20:31:42,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-12 20:31:42,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-12 20:31:42,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 260 transitions. [2022-12-12 20:31:42,385 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3611111111111111 [2022-12-12 20:31:42,386 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 203 predicate places. [2022-12-12 20:31:42,386 INFO L82 GeneralOperation]: Start removeDead. Operand has 233 places, 3894 transitions, 155812 flow [2022-12-12 20:31:42,513 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 232 places, 3827 transitions, 153105 flow [2022-12-12 20:31:42,513 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 3827 transitions, 153105 flow [2022-12-12 20:31:42,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.3) internal successors, (69), 30 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 20:31:42,514 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:31:42,514 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:31:42,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-12 20:31:42,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:31:42,719 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:31:42,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:31:42,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1772215727, now seen corresponding path program 5 times [2022-12-12 20:31:42,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:31:42,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713335441] [2022-12-12 20:31:42,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:31:42,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:31:42,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:31:43,252 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 20:31:43,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:31:43,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713335441] [2022-12-12 20:31:43,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713335441] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:31:43,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825171728] [2022-12-12 20:31:43,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 20:31:43,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:31:43,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:31:43,261 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 20:31:43,264 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 20:31:43,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 20:31:43,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:31:43,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-12 20:31:43,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:31:43,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-12-12 20:31:43,614 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 20:31:43,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:31:43,682 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:31:43,682 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 28 treesize of output 25 [2022-12-12 20:31:43,878 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 20:31:43,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825171728] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:31:43,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:31:43,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 8] total 22 [2022-12-12 20:31:43,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355493085] [2022-12-12 20:31:43,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:31:43,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-12 20:31:43,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:31:43,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-12 20:31:43,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-12-12 20:31:43,880 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 20:31:43,880 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 3827 transitions, 153105 flow. Second operand has 24 states, 24 states have (on average 3.625) internal successors, (87), 24 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:31:43,880 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:31:43,880 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 20:31:43,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:31:53,915 INFO L130 PetriNetUnfolder]: 6284/9841 cut-off events. [2022-12-12 20:31:53,915 INFO L131 PetriNetUnfolder]: For 40959/40959 co-relation queries the response was YES. [2022-12-12 20:31:53,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201662 conditions, 9841 events. 6284/9841 cut-off events. For 40959/40959 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 62949 event pairs, 16 based on Foata normal form. 1/7302 useless extension candidates. Maximal degree in co-relation 123559. Up to 9729 conditions per place. [2022-12-12 20:31:54,004 INFO L137 encePairwiseOnDemand]: 15/24 looper letters, 3208 selfloop transitions, 570 changer transitions 8/3859 dead transitions. [2022-12-12 20:31:54,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 3859 transitions, 161957 flow [2022-12-12 20:31:54,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-12 20:31:54,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-12 20:31:54,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 115 transitions. [2022-12-12 20:31:54,007 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.34226190476190477 [2022-12-12 20:31:54,007 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 214 predicate places. [2022-12-12 20:31:54,007 INFO L82 GeneralOperation]: Start removeDead. Operand has 244 places, 3859 transitions, 161957 flow [2022-12-12 20:31:54,144 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 244 places, 3851 transitions, 161612 flow [2022-12-12 20:31:54,145 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 3851 transitions, 161612 flow [2022-12-12 20:31:54,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.625) internal successors, (87), 24 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:31:54,145 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:31:54,145 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:31:54,150 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-12 20:31:54,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:31:54,350 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:31:54,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:31:54,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1763007933, now seen corresponding path program 5 times [2022-12-12 20:31:54,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:31:54,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369278935] [2022-12-12 20:31:54,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:31:54,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:31:54,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:31:54,631 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 20:31:54,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:31:54,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369278935] [2022-12-12 20:31:54,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369278935] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:31:54,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309533127] [2022-12-12 20:31:54,631 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 20:31:54,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:31:54,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:31:54,633 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 20:31:54,635 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 20:31:54,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-12 20:31:54,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:31:54,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-12 20:31:54,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:31:54,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:31:54,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 20:31:54,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-12-12 20:31:54,916 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 20:31:54,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:31:54,987 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:31:54,987 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 64 treesize of output 52 [2022-12-12 20:31:54,990 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 22 treesize of output 16 [2022-12-12 20:31:55,102 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 20:31:55,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309533127] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:31:55,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:31:55,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2022-12-12 20:31:55,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424240892] [2022-12-12 20:31:55,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:31:55,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-12 20:31:55,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:31:55,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-12 20:31:55,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=350, Unknown=4, NotChecked=0, Total=462 [2022-12-12 20:31:55,103 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 20:31:55,104 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 3851 transitions, 161612 flow. Second operand has 22 states, 22 states have (on average 4.0) internal successors, (88), 22 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:31:55,104 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:31:55,104 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 20:31:55,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:32:07,072 INFO L130 PetriNetUnfolder]: 6817/10679 cut-off events. [2022-12-12 20:32:07,081 INFO L131 PetriNetUnfolder]: For 53385/53385 co-relation queries the response was YES. [2022-12-12 20:32:07,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229061 conditions, 10679 events. 6817/10679 cut-off events. For 53385/53385 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 69452 event pairs, 20 based on Foata normal form. 6/7920 useless extension candidates. Maximal degree in co-relation 139732. Up to 10567 conditions per place. [2022-12-12 20:32:07,172 INFO L137 encePairwiseOnDemand]: 17/24 looper letters, 3689 selfloop transitions, 359 changer transitions 21/4127 dead transitions. [2022-12-12 20:32:07,173 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 4127 transitions, 181570 flow [2022-12-12 20:32:07,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 20:32:07,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 20:32:07,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 88 transitions. [2022-12-12 20:32:07,174 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2022-12-12 20:32:07,175 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 220 predicate places. [2022-12-12 20:32:07,175 INFO L82 GeneralOperation]: Start removeDead. Operand has 250 places, 4127 transitions, 181570 flow [2022-12-12 20:32:07,308 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 250 places, 4106 transitions, 180610 flow [2022-12-12 20:32:07,309 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 4106 transitions, 180610 flow [2022-12-12 20:32:07,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.0) internal successors, (88), 22 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:32:07,309 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:32:07,309 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:32:07,314 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 20:32:07,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:32:07,514 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:32:07,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:32:07,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1701701221, now seen corresponding path program 6 times [2022-12-12 20:32:07,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:32:07,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617201319] [2022-12-12 20:32:07,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:32:07,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:32:07,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:32:08,093 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 20:32:08,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:32:08,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617201319] [2022-12-12 20:32:08,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617201319] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:32:08,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226251726] [2022-12-12 20:32:08,094 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 20:32:08,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:32:08,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:32:08,095 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 20:32:08,097 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 20:32:08,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 20:32:08,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:32:08,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-12 20:32:08,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:32:08,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:32:08,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 20:32:08,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-12-12 20:32:08,446 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 20:32:08,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:32:08,483 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_891 (Array Int Int))) (= (mod (+ c_~sum1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_891) c_~A~0.base) (+ c_~A~0.offset (* c_thread1Thread1of1ForFork1_~i~0 4)))) 4294967296) (mod (+ c_~sum3~0 c_~sum2~0) 4294967296))) is different from false [2022-12-12 20:32:08,498 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:32:08,498 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 64 treesize of output 52 [2022-12-12 20:32:08,502 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 22 treesize of output 16 [2022-12-12 20:32:08,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-12-12 20:32:08,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226251726] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:32:08,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:32:08,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2022-12-12 20:32:08,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373842433] [2022-12-12 20:32:08,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:32:08,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-12 20:32:08,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:32:08,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-12 20:32:08,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=359, Unknown=1, NotChecked=40, Total=506 [2022-12-12 20:32:08,617 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 20:32:08,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 4106 transitions, 180610 flow. Second operand has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:32:08,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:32:08,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 20:32:08,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:32:18,696 INFO L130 PetriNetUnfolder]: 6945/10873 cut-off events. [2022-12-12 20:32:18,697 INFO L131 PetriNetUnfolder]: For 64949/64949 co-relation queries the response was YES. [2022-12-12 20:32:18,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243569 conditions, 10873 events. 6945/10873 cut-off events. For 64949/64949 co-relation queries the response was YES. Maximal size of possible extension queue 670. Compared 70926 event pairs, 15 based on Foata normal form. 2/8053 useless extension candidates. Maximal degree in co-relation 155297. Up to 10761 conditions per place. [2022-12-12 20:32:18,795 INFO L137 encePairwiseOnDemand]: 16/24 looper letters, 3887 selfloop transitions, 224 changer transitions 8/4177 dead transitions. [2022-12-12 20:32:18,795 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 4177 transitions, 192011 flow [2022-12-12 20:32:18,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 20:32:18,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 20:32:18,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 85 transitions. [2022-12-12 20:32:18,796 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4427083333333333 [2022-12-12 20:32:18,796 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 227 predicate places. [2022-12-12 20:32:18,796 INFO L82 GeneralOperation]: Start removeDead. Operand has 257 places, 4177 transitions, 192011 flow [2022-12-12 20:32:18,947 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 257 places, 4169 transitions, 191631 flow [2022-12-12 20:32:18,947 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 4169 transitions, 191631 flow [2022-12-12 20:32:18,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:32:18,947 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:32:18,947 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:32:18,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-12 20:32:19,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:32:19,152 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:32:19,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:32:19,153 INFO L85 PathProgramCache]: Analyzing trace with hash -236281487, now seen corresponding path program 7 times [2022-12-12 20:32:19,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:32:19,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297665491] [2022-12-12 20:32:19,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:32:19,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:32:19,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:32:19,560 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 20:32:19,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:32:19,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297665491] [2022-12-12 20:32:19,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297665491] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:32:19,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397527132] [2022-12-12 20:32:19,560 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 20:32:19,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:32:19,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:32:19,562 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 20:32:19,564 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 20:32:19,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:32:19,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-12 20:32:19,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:32:19,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-12 20:32:19,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 20:32:19,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 20:32:19,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 20:32:19,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-12-12 20:32:19,857 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 20:32:19,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:32:19,951 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 20:32:19,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397527132] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:32:19,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:32:19,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 4] total 17 [2022-12-12 20:32:19,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407023177] [2022-12-12 20:32:19,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:32:19,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 20:32:19,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:32:19,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 20:32:19,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-12-12 20:32:19,952 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 20:32:19,952 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 4169 transitions, 191631 flow. Second operand has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:32:19,952 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:32:19,952 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 20:32:19,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:32:30,534 INFO L130 PetriNetUnfolder]: 7229/11341 cut-off events. [2022-12-12 20:32:30,534 INFO L131 PetriNetUnfolder]: For 77995/77995 co-relation queries the response was YES. [2022-12-12 20:32:30,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264989 conditions, 11341 events. 7229/11341 cut-off events. For 77995/77995 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 74626 event pairs, 26 based on Foata normal form. 8/8379 useless extension candidates. Maximal degree in co-relation 162926. Up to 11229 conditions per place. [2022-12-12 20:32:30,636 INFO L137 encePairwiseOnDemand]: 15/24 looper letters, 3905 selfloop transitions, 310 changer transitions 28/4301 dead transitions. [2022-12-12 20:32:30,636 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 4301 transitions, 206303 flow [2022-12-12 20:32:30,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 20:32:30,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 20:32:30,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2022-12-12 20:32:30,637 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.453125 [2022-12-12 20:32:30,638 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 234 predicate places. [2022-12-12 20:32:30,638 INFO L82 GeneralOperation]: Start removeDead. Operand has 264 places, 4301 transitions, 206303 flow [2022-12-12 20:32:30,789 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 264 places, 4273 transitions, 204911 flow [2022-12-12 20:32:30,789 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 4273 transitions, 204911 flow [2022-12-12 20:32:30,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:32:30,789 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:32:30,789 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:32:30,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-12 20:32:30,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:32:30,994 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 20:32:30,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:32:30,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1203069127, now seen corresponding path program 6 times [2022-12-12 20:32:30,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:32:30,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655713528] [2022-12-12 20:32:30,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:32:30,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:32:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:32:31,716 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 20:32:31,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:32:31,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655713528] [2022-12-12 20:32:31,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655713528] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:32:31,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245067770] [2022-12-12 20:32:31,716 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 20:32:31,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:32:31,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:32:31,718 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 20:32:31,720 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 20:32:31,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 20:32:31,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:32:31,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-12 20:32:31,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:32:31,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-12 20:32:31,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 20:32:32,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:32:32,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 20:32:32,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:32:32,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 20:32:32,107 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:32:32,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-12-12 20:32:32,280 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 20:32:32,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:32:32,943 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:32:32,943 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 60 treesize of output 49 [2022-12-12 20:32:32,953 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:32:32,953 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 990 treesize of output 904 [2022-12-12 20:32:32,959 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 894 treesize of output 798 [2022-12-12 20:32:32,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 798 treesize of output 750 [2022-12-12 20:32:32,977 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:32:32,978 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 750 treesize of output 704 Received shutdown request... [2022-12-12 20:45:18,405 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 20:45:18,420 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 20:45:18,449 WARN L249 SmtUtils]: Removed 2 from assertion stack [2022-12-12 20:45:18,451 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2022-12-12 20:45:18,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-12 20:45:18,651 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,SelfDestructingSolverStorable23 [2022-12-12 20:45:18,652 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 22 for 2014ms.. [2022-12-12 20:45:18,653 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2022-12-12 20:45:18,653 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-12-12 20:45:18,653 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2022-12-12 20:45:18,653 INFO L445 BasicCegarLoop]: Path program histogram: [7, 6, 6, 1, 1, 1, 1, 1] [2022-12-12 20:45:18,656 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-12 20:45:18,656 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-12 20:45:18,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.12 08:45:18 BasicIcfg [2022-12-12 20:45:18,658 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-12 20:45:18,658 INFO L158 Benchmark]: Toolchain (without parser) took 867321.91ms. Allocated memory was 206.6MB in the beginning and 2.1GB in the end (delta: 1.9GB). Free memory was 165.6MB in the beginning and 1.4GB in the end (delta: -1.2GB). Peak memory consumption was 1.6GB. Max. memory is 8.0GB. [2022-12-12 20:45:18,658 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 206.6MB. Free memory was 183.4MB in the beginning and 183.4MB in the end (delta: 62.0kB). There was no memory consumed. Max. memory is 8.0GB. [2022-12-12 20:45:18,658 INFO L158 Benchmark]: CACSL2BoogieTranslator took 240.55ms. Allocated memory is still 206.6MB. Free memory was 165.6MB in the beginning and 153.6MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-12-12 20:45:18,658 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.25ms. Allocated memory is still 206.6MB. Free memory was 153.6MB in the beginning and 152.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-12 20:45:18,658 INFO L158 Benchmark]: Boogie Preprocessor took 32.67ms. Allocated memory is still 206.6MB. Free memory was 152.0MB in the beginning and 150.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-12-12 20:45:18,659 INFO L158 Benchmark]: RCFGBuilder took 416.84ms. Allocated memory is still 206.6MB. Free memory was 150.4MB in the beginning and 134.2MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. [2022-12-12 20:45:18,659 INFO L158 Benchmark]: TraceAbstraction took 866585.51ms. Allocated memory was 206.6MB in the beginning and 2.1GB in the end (delta: 1.9GB). Free memory was 132.6MB in the beginning and 1.4GB in the end (delta: -1.3GB). Peak memory consumption was 1.6GB. Max. memory is 8.0GB. [2022-12-12 20:45:18,661 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 206.6MB. Free memory was 183.4MB in the beginning and 183.4MB in the end (delta: 62.0kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 240.55ms. Allocated memory is still 206.6MB. Free memory was 165.6MB in the beginning and 153.6MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 40.25ms. Allocated memory is still 206.6MB. Free memory was 153.6MB in the beginning and 152.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 32.67ms. Allocated memory is still 206.6MB. Free memory was 152.0MB in the beginning and 150.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 416.84ms. Allocated memory is still 206.6MB. Free memory was 150.4MB in the beginning and 134.2MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. * TraceAbstraction took 866585.51ms. Allocated memory was 206.6MB in the beginning and 2.1GB in the end (delta: 1.9GB). Free memory was 132.6MB in the beginning and 1.4GB in the end (delta: -1.3GB). Peak memory consumption was 1.6GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.2s, 133 PlacesBefore, 30 PlacesAfterwards, 135 TransitionsBefore, 24 TransitionsAfterwards, 1728 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 67 TrivialYvCompositions, 36 ConcurrentYvCompositions, 8 ChoiceCompositions, 111 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 959, independent: 952, independent conditional: 952, independent unconditional: 0, dependent: 7, dependent conditional: 7, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 959, independent: 952, independent conditional: 0, independent unconditional: 952, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 959, independent: 952, independent conditional: 0, independent unconditional: 952, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 959, independent: 952, independent conditional: 0, independent unconditional: 952, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 959, independent: 952, independent conditional: 0, independent unconditional: 952, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 959, independent: 952, independent conditional: 0, independent unconditional: 952, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 7, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 13, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 13, dependent conditional: 0, dependent unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 959, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 959, unknown conditional: 0, unknown unconditional: 959] , Statistics on independence cache: Total cache size (in pairs): 1530, Positive cache size: 1523, Positive conditional cache size: 0, Positive unconditional cache size: 1523, Negative cache size: 7, Negative conditional cache size: 0, Negative unconditional cache size: 7, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1 - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 22 for 2014ms.. - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 22 for 2014ms.. - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 22 for 2014ms.. - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 22 for 2014ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 173 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 1.2s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 866.5s, OverallIterations: 24, TraceHistogramMax: 1, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 72.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2428 SdHoareTripleChecker+Valid, 7.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2428 mSDsluCounter, 819 SdHoareTripleChecker+Invalid, 6.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 33 IncrementalHoareTripleChecker+Unchecked, 712 mSDsCounter, 171 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12142 IncrementalHoareTripleChecker+Invalid, 12346 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 171 mSolverCounterUnsat, 107 mSDtfsCounter, 12142 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1155 GetRequests, 617 SyntacticMatches, 32 SemanticMatches, 506 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4435 ImplicationChecksByTransitivity, 10.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=204911occurred in iteration=23, InterpolantAutomatonStates: 265, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.2s AutomataMinimizationTime, 23 MinimizatonAttempts, 8880 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 14.2s InterpolantComputationTime, 943 NumberOfCodeBlocks, 937 NumberOfCodeBlocksAsserted, 57 NumberOfCheckSat, 1312 ConstructedInterpolants, 21 QuantifiedInterpolants, 19220 SizeOfPredicates, 190 NumberOfNonLiveVariables, 4056 ConjunctsInSsa, 480 ConjunctsInUnsatCore, 61 InterpolantComputations, 9 PerfectInterpolantSequences, 46/153 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