/usr/bin/java -Xmx16000000000 -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-NoLbe-Before.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 08:59:04,443 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 08:59:04,445 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 08:59:04,509 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 08:59:04,510 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 08:59:04,511 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 08:59:04,512 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 08:59:04,514 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 08:59:04,523 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 08:59:04,525 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 08:59:04,526 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 08:59:04,527 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 08:59:04,527 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 08:59:04,528 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 08:59:04,529 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 08:59:04,530 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 08:59:04,530 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 08:59:04,531 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 08:59:04,532 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 08:59:04,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 08:59:04,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 08:59:04,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 08:59:04,546 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 08:59:04,547 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 08:59:04,554 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 08:59:04,554 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 08:59:04,554 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 08:59:04,555 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 08:59:04,555 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 08:59:04,556 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 08:59:04,556 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 08:59:04,557 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 08:59:04,557 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 08:59:04,558 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 08:59:04,558 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 08:59:04,559 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 08:59:04,559 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 08:59:04,559 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 08:59:04,559 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 08:59:04,560 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 08:59:04,561 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 08:59:04,565 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-NoLbe-Before.epf [2022-01-19 08:59:04,595 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 08:59:04,596 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 08:59:04,596 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 08:59:04,597 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 08:59:04,597 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 08:59:04,597 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 08:59:04,597 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 08:59:04,597 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 08:59:04,598 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 08:59:04,598 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 08:59:04,598 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 08:59:04,599 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 08:59:04,599 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 08:59:04,599 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 08:59:04,599 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 08:59:04,599 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 08:59:04,599 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 08:59:04,599 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 08:59:04,600 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 08:59:04,600 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 08:59:04,600 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 08:59:04,600 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 08:59:04,600 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 08:59:04,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 08:59:04,600 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 08:59:04,601 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 08:59:04,601 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 08:59:04,602 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 08:59:04,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 08:59:04,602 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 08:59:04,602 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 08:59:04,602 INFO L138 SettingsManager]: * When to check the insufficient erros location relative to the other error locations=BEFORE [2022-01-19 08:59:04,602 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 08:59:04,777 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 08:59:04,796 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 08:59:04,798 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 08:59:04,799 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 08:59:04,799 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 08:59:04,800 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c [2022-01-19 08:59:04,861 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f67c23de1/efa91162920c493192a268a8f86c45ee/FLAG8ed57f0d1 [2022-01-19 08:59:05,247 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 08:59:05,248 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c [2022-01-19 08:59:05,256 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f67c23de1/efa91162920c493192a268a8f86c45ee/FLAG8ed57f0d1 [2022-01-19 08:59:05,644 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f67c23de1/efa91162920c493192a268a8f86c45ee [2022-01-19 08:59:05,647 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 08:59:05,648 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 08:59:05,649 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 08:59:05,649 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 08:59:05,652 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 08:59:05,653 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 08:59:05" (1/1) ... [2022-01-19 08:59:05,654 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41fc6806 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:59:05, skipping insertion in model container [2022-01-19 08:59:05,654 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 08:59:05" (1/1) ... [2022-01-19 08:59:05,660 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 08:59:05,673 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 08:59:05,816 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c[2438,2451] [2022-01-19 08:59:05,822 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 08:59:05,835 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 08:59:05,849 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c[2438,2451] [2022-01-19 08:59:05,852 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 08:59:05,862 INFO L208 MainTranslator]: Completed translation [2022-01-19 08:59:05,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:59:05 WrapperNode [2022-01-19 08:59:05,862 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 08:59:05,863 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 08:59:05,863 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 08:59:05,863 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 08:59:05,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:59:05" (1/1) ... [2022-01-19 08:59:05,887 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:59:05" (1/1) ... [2022-01-19 08:59:05,916 INFO L137 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 128 [2022-01-19 08:59:05,917 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 08:59:05,918 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 08:59:05,918 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 08:59:05,918 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 08:59:05,924 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:59:05" (1/1) ... [2022-01-19 08:59:05,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:59:05" (1/1) ... [2022-01-19 08:59:05,937 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:59:05" (1/1) ... [2022-01-19 08:59:05,937 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:59:05" (1/1) ... [2022-01-19 08:59:05,943 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:59:05" (1/1) ... [2022-01-19 08:59:05,946 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:59:05" (1/1) ... [2022-01-19 08:59:05,947 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:59:05" (1/1) ... [2022-01-19 08:59:05,949 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 08:59:05,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 08:59:05,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 08:59:05,950 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 08:59:05,951 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:59:05" (1/1) ... [2022-01-19 08:59:05,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 08:59:05,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:59:05,980 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) [2022-01-19 08:59:05,994 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 [2022-01-19 08:59:06,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 08:59:06,024 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-19 08:59:06,024 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-19 08:59:06,024 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-19 08:59:06,024 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-19 08:59:06,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 08:59:06,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 08:59:06,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 08:59:06,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-19 08:59:06,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-19 08:59:06,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-19 08:59:06,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 08:59:06,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 08:59:06,027 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 08:59:06,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 08:59:06,029 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-19 08:59:06,152 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 08:59:06,153 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 08:59:06,420 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 08:59:06,491 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 08:59:06,491 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-19 08:59:06,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 08:59:06 BoogieIcfgContainer [2022-01-19 08:59:06,493 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 08:59:06,494 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 08:59:06,494 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 08:59:06,501 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 08:59:06,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 08:59:05" (1/3) ... [2022-01-19 08:59:06,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@218d4917 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 08:59:06, skipping insertion in model container [2022-01-19 08:59:06,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:59:05" (2/3) ... [2022-01-19 08:59:06,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@218d4917 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 08:59:06, skipping insertion in model container [2022-01-19 08:59:06,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 08:59:06" (3/3) ... [2022-01-19 08:59:06,504 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-simple-queue.wvr.c [2022-01-19 08:59:06,509 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 08:59:06,509 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 08:59:06,509 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 08:59:06,561 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,561 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,562 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,563 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,563 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,564 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,564 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,564 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,564 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,564 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,564 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,565 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,565 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,565 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,565 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,565 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,566 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,566 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,566 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,566 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,568 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,568 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,568 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,569 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,570 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,570 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,570 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,570 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,571 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,571 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,571 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,571 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,572 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,572 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,572 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,572 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,573 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,573 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,573 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,573 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,578 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,578 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,579 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,579 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,579 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,579 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,579 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,581 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,581 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,581 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,581 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,582 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,582 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,582 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:59:06,588 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-19 08:59:06,626 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 08:59:06,632 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-19 08:59:06,632 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-19 08:59:06,651 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 118 places, 120 transitions, 256 flow [2022-01-19 08:59:06,724 INFO L129 PetriNetUnfolder]: 9/118 cut-off events. [2022-01-19 08:59:06,725 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 08:59:06,728 INFO L84 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 118 events. 9/118 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2022-01-19 08:59:06,729 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 120 transitions, 256 flow [2022-01-19 08:59:06,734 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 109 transitions, 230 flow [2022-01-19 08:59:06,768 INFO L129 PetriNetUnfolder]: 9/108 cut-off events. [2022-01-19 08:59:06,769 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 08:59:06,769 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:59:06,770 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:59:06,770 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:59:06,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:59:06,778 INFO L85 PathProgramCache]: Analyzing trace with hash 236033483, now seen corresponding path program 1 times [2022-01-19 08:59:06,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:59:06,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069069655] [2022-01-19 08:59:06,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:59:06,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:59:06,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:59:07,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:59:07,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:59:07,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069069655] [2022-01-19 08:59:07,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069069655] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:59:07,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:59:07,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-19 08:59:07,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264615261] [2022-01-19 08:59:07,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:59:07,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-19 08:59:07,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:59:07,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-19 08:59:07,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-19 08:59:07,065 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 120 [2022-01-19 08:59:07,070 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 109 transitions, 230 flow. Second operand has 2 states, 2 states have (on average 110.0) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:07,071 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:59:07,073 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 120 [2022-01-19 08:59:07,079 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:59:07,130 INFO L129 PetriNetUnfolder]: 5/105 cut-off events. [2022-01-19 08:59:07,130 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-01-19 08:59:07,131 INFO L84 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 105 events. 5/105 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 8/107 useless extension candidates. Maximal degree in co-relation 83. Up to 9 conditions per place. [2022-01-19 08:59:07,133 INFO L132 encePairwiseOnDemand]: 114/120 looper letters, 6 selfloop transitions, 0 changer transitions 3/103 dead transitions. [2022-01-19 08:59:07,133 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 103 transitions, 230 flow [2022-01-19 08:59:07,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-19 08:59:07,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-01-19 08:59:07,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 226 transitions. [2022-01-19 08:59:07,152 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9416666666666667 [2022-01-19 08:59:07,153 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 226 transitions. [2022-01-19 08:59:07,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 226 transitions. [2022-01-19 08:59:07,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:59:07,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 226 transitions. [2022-01-19 08:59:07,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 113.0) internal successors, (226), 2 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:07,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:07,170 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:07,172 INFO L186 Difference]: Start difference. First operand has 107 places, 109 transitions, 230 flow. Second operand 2 states and 226 transitions. [2022-01-19 08:59:07,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 103 transitions, 230 flow [2022-01-19 08:59:07,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 103 transitions, 222 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 08:59:07,179 INFO L242 Difference]: Finished difference. Result has 104 places, 100 transitions, 204 flow [2022-01-19 08:59:07,180 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=204, PETRI_PLACES=104, PETRI_TRANSITIONS=100} [2022-01-19 08:59:07,185 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, -3 predicate places. [2022-01-19 08:59:07,185 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 100 transitions, 204 flow [2022-01-19 08:59:07,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 110.0) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:07,186 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:59:07,186 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:59:07,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 08:59:07,187 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:59:07,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:59:07,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1569320269, now seen corresponding path program 1 times [2022-01-19 08:59:07,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:59:07,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306477188] [2022-01-19 08:59:07,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:59:07,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:59:07,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:59:07,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:59:07,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:59:07,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306477188] [2022-01-19 08:59:07,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306477188] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:59:07,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:59:07,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 08:59:07,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796256881] [2022-01-19 08:59:07,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:59:07,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 08:59:07,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:59:07,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 08:59:07,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-19 08:59:07,435 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 120 [2022-01-19 08:59:07,436 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 100 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 93.6) internal successors, (468), 5 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:07,436 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:59:07,436 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 120 [2022-01-19 08:59:07,436 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:59:07,518 INFO L129 PetriNetUnfolder]: 7/124 cut-off events. [2022-01-19 08:59:07,518 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-01-19 08:59:07,519 INFO L84 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 124 events. 7/124 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 99 event pairs, 0 based on Foata normal form. 1/120 useless extension candidates. Maximal degree in co-relation 156. Up to 15 conditions per place. [2022-01-19 08:59:07,520 INFO L132 encePairwiseOnDemand]: 115/120 looper letters, 21 selfloop transitions, 2 changer transitions 4/107 dead transitions. [2022-01-19 08:59:07,520 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 107 transitions, 274 flow [2022-01-19 08:59:07,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-19 08:59:07,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-01-19 08:59:07,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 478 transitions. [2022-01-19 08:59:07,526 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7966666666666666 [2022-01-19 08:59:07,526 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 478 transitions. [2022-01-19 08:59:07,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 478 transitions. [2022-01-19 08:59:07,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:59:07,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 478 transitions. [2022-01-19 08:59:07,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 95.6) internal successors, (478), 5 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:07,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 120.0) internal successors, (720), 6 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:07,533 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 120.0) internal successors, (720), 6 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:07,533 INFO L186 Difference]: Start difference. First operand has 104 places, 100 transitions, 204 flow. Second operand 5 states and 478 transitions. [2022-01-19 08:59:07,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 107 transitions, 274 flow [2022-01-19 08:59:07,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 107 transitions, 274 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 08:59:07,538 INFO L242 Difference]: Finished difference. Result has 108 places, 101 transitions, 220 flow [2022-01-19 08:59:07,538 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=220, PETRI_PLACES=108, PETRI_TRANSITIONS=101} [2022-01-19 08:59:07,539 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 1 predicate places. [2022-01-19 08:59:07,539 INFO L470 AbstractCegarLoop]: Abstraction has has 108 places, 101 transitions, 220 flow [2022-01-19 08:59:07,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.6) internal successors, (468), 5 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:07,539 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:59:07,540 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:59:07,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 08:59:07,540 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:59:07,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:59:07,541 INFO L85 PathProgramCache]: Analyzing trace with hash -140655275, now seen corresponding path program 1 times [2022-01-19 08:59:07,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:59:07,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445958341] [2022-01-19 08:59:07,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:59:07,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:59:07,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:59:07,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:59:07,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:59:07,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445958341] [2022-01-19 08:59:07,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445958341] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:59:07,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:59:07,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 08:59:07,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707379983] [2022-01-19 08:59:07,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:59:07,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 08:59:07,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:59:07,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 08:59:07,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 08:59:07,662 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 120 [2022-01-19 08:59:07,663 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 101 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:07,663 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:59:07,663 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 120 [2022-01-19 08:59:07,663 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:59:07,711 INFO L129 PetriNetUnfolder]: 8/142 cut-off events. [2022-01-19 08:59:07,711 INFO L130 PetriNetUnfolder]: For 13/14 co-relation queries the response was YES. [2022-01-19 08:59:07,711 INFO L84 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 142 events. 8/142 cut-off events. For 13/14 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 194 event pairs, 1 based on Foata normal form. 3/137 useless extension candidates. Maximal degree in co-relation 177. Up to 18 conditions per place. [2022-01-19 08:59:07,712 INFO L132 encePairwiseOnDemand]: 117/120 looper letters, 11 selfloop transitions, 2 changer transitions 2/105 dead transitions. [2022-01-19 08:59:07,712 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 105 transitions, 261 flow [2022-01-19 08:59:07,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 08:59:07,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 08:59:07,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 324 transitions. [2022-01-19 08:59:07,714 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9 [2022-01-19 08:59:07,714 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 324 transitions. [2022-01-19 08:59:07,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 324 transitions. [2022-01-19 08:59:07,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:59:07,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 324 transitions. [2022-01-19 08:59:07,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:07,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:07,716 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:07,716 INFO L186 Difference]: Start difference. First operand has 108 places, 101 transitions, 220 flow. Second operand 3 states and 324 transitions. [2022-01-19 08:59:07,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 105 transitions, 261 flow [2022-01-19 08:59:07,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 105 transitions, 255 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-01-19 08:59:07,719 INFO L242 Difference]: Finished difference. Result has 106 places, 102 transitions, 226 flow [2022-01-19 08:59:07,719 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=106, PETRI_TRANSITIONS=102} [2022-01-19 08:59:07,720 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, -1 predicate places. [2022-01-19 08:59:07,720 INFO L470 AbstractCegarLoop]: Abstraction has has 106 places, 102 transitions, 226 flow [2022-01-19 08:59:07,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:07,720 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:59:07,721 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:59:07,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-19 08:59:07,721 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:59:07,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:59:07,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1295712521, now seen corresponding path program 1 times [2022-01-19 08:59:07,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:59:07,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245208984] [2022-01-19 08:59:07,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:59:07,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:59:07,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:59:07,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:59:07,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:59:07,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245208984] [2022-01-19 08:59:07,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245208984] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:59:07,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:59:07,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 08:59:07,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233731435] [2022-01-19 08:59:07,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:59:07,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 08:59:07,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:59:07,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 08:59:07,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-19 08:59:07,816 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 120 [2022-01-19 08:59:07,817 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 102 transitions, 226 flow. Second operand has 6 states, 6 states have (on average 95.66666666666667) internal successors, (574), 6 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:07,817 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:59:07,817 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 120 [2022-01-19 08:59:07,817 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:59:07,911 INFO L129 PetriNetUnfolder]: 8/185 cut-off events. [2022-01-19 08:59:07,911 INFO L130 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2022-01-19 08:59:07,911 INFO L84 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 185 events. 8/185 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 369 event pairs, 2 based on Foata normal form. 2/175 useless extension candidates. Maximal degree in co-relation 247. Up to 28 conditions per place. [2022-01-19 08:59:07,912 INFO L132 encePairwiseOnDemand]: 112/120 looper letters, 20 selfloop transitions, 6 changer transitions 5/111 dead transitions. [2022-01-19 08:59:07,912 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 111 transitions, 310 flow [2022-01-19 08:59:07,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-19 08:59:07,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-01-19 08:59:07,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 681 transitions. [2022-01-19 08:59:07,914 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8107142857142857 [2022-01-19 08:59:07,915 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 681 transitions. [2022-01-19 08:59:07,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 681 transitions. [2022-01-19 08:59:07,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:59:07,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 681 transitions. [2022-01-19 08:59:07,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.28571428571429) internal successors, (681), 7 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:07,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 120.0) internal successors, (960), 8 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:07,919 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 120.0) internal successors, (960), 8 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:07,919 INFO L186 Difference]: Start difference. First operand has 106 places, 102 transitions, 226 flow. Second operand 7 states and 681 transitions. [2022-01-19 08:59:07,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 111 transitions, 310 flow [2022-01-19 08:59:07,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 111 transitions, 308 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-01-19 08:59:07,923 INFO L242 Difference]: Finished difference. Result has 113 places, 103 transitions, 246 flow [2022-01-19 08:59:07,923 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=246, PETRI_PLACES=113, PETRI_TRANSITIONS=103} [2022-01-19 08:59:07,924 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 6 predicate places. [2022-01-19 08:59:07,924 INFO L470 AbstractCegarLoop]: Abstraction has has 113 places, 103 transitions, 246 flow [2022-01-19 08:59:07,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 95.66666666666667) internal successors, (574), 6 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:07,924 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:59:07,925 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:59:07,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-19 08:59:07,925 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:59:07,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:59:07,925 INFO L85 PathProgramCache]: Analyzing trace with hash 544482272, now seen corresponding path program 1 times [2022-01-19 08:59:07,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:59:07,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505494841] [2022-01-19 08:59:07,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:59:07,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:59:07,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:59:08,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:59:08,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:59:08,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505494841] [2022-01-19 08:59:08,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505494841] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:59:08,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562459700] [2022-01-19 08:59:08,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:59:08,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:59:08,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:59:08,371 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) [2022-01-19 08:59:08,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-19 08:59:08,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:59:08,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-19 08:59:08,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:59:09,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-19 08:59:09,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:59:09,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:59:09,650 INFO L353 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-01-19 08:59:09,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 15 [2022-01-19 08:59:10,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:59:10,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562459700] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:59:10,364 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:59:10,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 13] total 37 [2022-01-19 08:59:10,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655358168] [2022-01-19 08:59:10,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:59:10,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-19 08:59:10,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:59:10,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-19 08:59:10,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1089, Unknown=0, NotChecked=0, Total=1332 [2022-01-19 08:59:10,369 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-01-19 08:59:10,371 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 103 transitions, 246 flow. Second operand has 37 states, 37 states have (on average 61.189189189189186) internal successors, (2264), 37 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:10,371 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:59:10,371 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-01-19 08:59:10,372 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:59:11,733 INFO L129 PetriNetUnfolder]: 95/652 cut-off events. [2022-01-19 08:59:11,733 INFO L130 PetriNetUnfolder]: For 181/181 co-relation queries the response was YES. [2022-01-19 08:59:11,736 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1113 conditions, 652 events. 95/652 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3828 event pairs, 0 based on Foata normal form. 4/611 useless extension candidates. Maximal degree in co-relation 1105. Up to 78 conditions per place. [2022-01-19 08:59:11,738 INFO L132 encePairwiseOnDemand]: 94/120 looper letters, 109 selfloop transitions, 45 changer transitions 25/227 dead transitions. [2022-01-19 08:59:11,738 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 227 transitions, 965 flow [2022-01-19 08:59:11,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-19 08:59:11,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-01-19 08:59:11,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2441 transitions. [2022-01-19 08:59:11,744 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5215811965811966 [2022-01-19 08:59:11,744 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2441 transitions. [2022-01-19 08:59:11,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2441 transitions. [2022-01-19 08:59:11,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:59:11,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2441 transitions. [2022-01-19 08:59:11,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 62.58974358974359) internal successors, (2441), 39 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:11,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 120.0) internal successors, (4800), 40 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:11,767 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 120.0) internal successors, (4800), 40 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:11,768 INFO L186 Difference]: Start difference. First operand has 113 places, 103 transitions, 246 flow. Second operand 39 states and 2441 transitions. [2022-01-19 08:59:11,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 227 transitions, 965 flow [2022-01-19 08:59:11,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 227 transitions, 951 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-01-19 08:59:11,773 INFO L242 Difference]: Finished difference. Result has 164 places, 140 transitions, 561 flow [2022-01-19 08:59:11,773 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=561, PETRI_PLACES=164, PETRI_TRANSITIONS=140} [2022-01-19 08:59:11,774 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 57 predicate places. [2022-01-19 08:59:11,774 INFO L470 AbstractCegarLoop]: Abstraction has has 164 places, 140 transitions, 561 flow [2022-01-19 08:59:11,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 61.189189189189186) internal successors, (2264), 37 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:11,775 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:59:11,775 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:59:11,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-19 08:59:11,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:59:11,993 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:59:11,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:59:11,994 INFO L85 PathProgramCache]: Analyzing trace with hash -2005710638, now seen corresponding path program 2 times [2022-01-19 08:59:11,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:59:11,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764630853] [2022-01-19 08:59:11,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:59:11,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:59:12,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:59:12,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:59:12,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:59:12,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764630853] [2022-01-19 08:59:12,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764630853] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:59:12,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452722626] [2022-01-19 08:59:12,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:59:12,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:59:12,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:59:12,512 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) [2022-01-19 08:59:12,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-19 08:59:12,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:59:12,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:59:12,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-19 08:59:12,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:59:13,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 11 [2022-01-19 08:59:13,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 [2022-01-19 08:59:13,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 08:59:13,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-19 08:59:13,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-19 08:59:13,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:59:13,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:59:13,880 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_92 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_92) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) is different from false [2022-01-19 08:59:14,706 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:59:14,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 57 treesize of output 45 [2022-01-19 08:59:14,719 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:59:14,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 178 treesize of output 170 [2022-01-19 08:59:14,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 130 treesize of output 106 [2022-01-19 08:59:14,739 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:59:14,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 130 treesize of output 128 [2022-01-19 08:59:15,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:59:15,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452722626] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:59:15,626 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:59:15,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 54 [2022-01-19 08:59:15,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691277364] [2022-01-19 08:59:15,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:59:15,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-19 08:59:15,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:59:15,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-19 08:59:15,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=2522, Unknown=10, NotChecked=102, Total=2862 [2022-01-19 08:59:15,632 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 120 [2022-01-19 08:59:15,634 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 140 transitions, 561 flow. Second operand has 54 states, 54 states have (on average 53.51851851851852) internal successors, (2890), 54 states have internal predecessors, (2890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:15,634 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:59:15,634 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 120 [2022-01-19 08:59:15,634 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:59:18,005 INFO L129 PetriNetUnfolder]: 202/1209 cut-off events. [2022-01-19 08:59:18,005 INFO L130 PetriNetUnfolder]: For 1305/1317 co-relation queries the response was YES. [2022-01-19 08:59:18,011 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2554 conditions, 1209 events. 202/1209 cut-off events. For 1305/1317 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 9290 event pairs, 5 based on Foata normal form. 16/1134 useless extension candidates. Maximal degree in co-relation 2528. Up to 210 conditions per place. [2022-01-19 08:59:18,016 INFO L132 encePairwiseOnDemand]: 90/120 looper letters, 91 selfloop transitions, 96 changer transitions 15/247 dead transitions. [2022-01-19 08:59:18,016 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 247 transitions, 1510 flow [2022-01-19 08:59:18,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-19 08:59:18,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-01-19 08:59:18,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2138 transitions. [2022-01-19 08:59:18,023 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4568376068376068 [2022-01-19 08:59:18,023 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2138 transitions. [2022-01-19 08:59:18,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2138 transitions. [2022-01-19 08:59:18,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:59:18,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2138 transitions. [2022-01-19 08:59:18,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 54.82051282051282) internal successors, (2138), 39 states have internal predecessors, (2138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:18,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 120.0) internal successors, (4800), 40 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:18,036 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 120.0) internal successors, (4800), 40 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:18,036 INFO L186 Difference]: Start difference. First operand has 164 places, 140 transitions, 561 flow. Second operand 39 states and 2138 transitions. [2022-01-19 08:59:18,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 247 transitions, 1510 flow [2022-01-19 08:59:18,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 247 transitions, 1325 flow, removed 78 selfloop flow, removed 20 redundant places. [2022-01-19 08:59:18,048 INFO L242 Difference]: Finished difference. Result has 186 places, 198 transitions, 1154 flow [2022-01-19 08:59:18,048 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1154, PETRI_PLACES=186, PETRI_TRANSITIONS=198} [2022-01-19 08:59:18,049 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 79 predicate places. [2022-01-19 08:59:18,049 INFO L470 AbstractCegarLoop]: Abstraction has has 186 places, 198 transitions, 1154 flow [2022-01-19 08:59:18,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 53.51851851851852) internal successors, (2890), 54 states have internal predecessors, (2890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:18,050 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:59:18,050 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:59:18,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-19 08:59:18,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-01-19 08:59:18,253 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:59:18,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:59:18,254 INFO L85 PathProgramCache]: Analyzing trace with hash -358168892, now seen corresponding path program 3 times [2022-01-19 08:59:18,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:59:18,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083030063] [2022-01-19 08:59:18,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:59:18,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:59:18,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:59:18,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 08:59:18,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:59:18,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083030063] [2022-01-19 08:59:18,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083030063] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:59:18,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903909151] [2022-01-19 08:59:18,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 08:59:18,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:59:18,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:59:18,313 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) [2022-01-19 08:59:18,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-19 08:59:18,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-19 08:59:18,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:59:18,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 08:59:18,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:59:18,781 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:59:18,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:59:19,324 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:59:19,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903909151] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:59:19,324 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:59:19,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 11] total 22 [2022-01-19 08:59:19,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148475365] [2022-01-19 08:59:19,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:59:19,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-19 08:59:19,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:59:19,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-19 08:59:19,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2022-01-19 08:59:19,328 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 120 [2022-01-19 08:59:19,330 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 198 transitions, 1154 flow. Second operand has 22 states, 22 states have (on average 90.95454545454545) internal successors, (2001), 22 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:19,330 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:59:19,330 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 120 [2022-01-19 08:59:19,330 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:59:19,837 INFO L129 PetriNetUnfolder]: 144/1257 cut-off events. [2022-01-19 08:59:19,838 INFO L130 PetriNetUnfolder]: For 2034/2078 co-relation queries the response was YES. [2022-01-19 08:59:19,842 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2659 conditions, 1257 events. 144/1257 cut-off events. For 2034/2078 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 10377 event pairs, 9 based on Foata normal form. 47/1198 useless extension candidates. Maximal degree in co-relation 2631. Up to 114 conditions per place. [2022-01-19 08:59:19,844 INFO L132 encePairwiseOnDemand]: 105/120 looper letters, 58 selfloop transitions, 39 changer transitions 39/224 dead transitions. [2022-01-19 08:59:19,845 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 224 transitions, 1546 flow [2022-01-19 08:59:19,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-19 08:59:19,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-01-19 08:59:19,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1734 transitions. [2022-01-19 08:59:19,849 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7605263157894737 [2022-01-19 08:59:19,849 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1734 transitions. [2022-01-19 08:59:19,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1734 transitions. [2022-01-19 08:59:19,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:59:19,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1734 transitions. [2022-01-19 08:59:19,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 91.26315789473684) internal successors, (1734), 19 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:19,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 120.0) internal successors, (2400), 20 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:19,857 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 120.0) internal successors, (2400), 20 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:19,857 INFO L186 Difference]: Start difference. First operand has 186 places, 198 transitions, 1154 flow. Second operand 19 states and 1734 transitions. [2022-01-19 08:59:19,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 224 transitions, 1546 flow [2022-01-19 08:59:19,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 224 transitions, 1467 flow, removed 13 selfloop flow, removed 28 redundant places. [2022-01-19 08:59:19,866 INFO L242 Difference]: Finished difference. Result has 177 places, 164 transitions, 938 flow [2022-01-19 08:59:19,866 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=924, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=938, PETRI_PLACES=177, PETRI_TRANSITIONS=164} [2022-01-19 08:59:19,867 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 70 predicate places. [2022-01-19 08:59:19,867 INFO L470 AbstractCegarLoop]: Abstraction has has 177 places, 164 transitions, 938 flow [2022-01-19 08:59:19,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 90.95454545454545) internal successors, (2001), 22 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:19,868 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:59:19,868 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:59:19,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-19 08:59:20,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:59:20,092 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:59:20,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:59:20,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1320290218, now seen corresponding path program 4 times [2022-01-19 08:59:20,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:59:20,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326304135] [2022-01-19 08:59:20,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:59:20,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:59:20,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:59:20,161 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-19 08:59:20,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:59:20,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326304135] [2022-01-19 08:59:20,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326304135] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:59:20,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434110444] [2022-01-19 08:59:20,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 08:59:20,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:59:20,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:59:20,163 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) [2022-01-19 08:59:20,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-19 08:59:20,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 08:59:20,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:59:20,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 08:59:20,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:59:20,439 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 08:59:20,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:59:20,725 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 08:59:20,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434110444] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:59:20,726 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:59:20,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 08:59:20,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851667812] [2022-01-19 08:59:20,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:59:20,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 08:59:20,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:59:20,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 08:59:20,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-01-19 08:59:20,729 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 120 [2022-01-19 08:59:20,730 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 164 transitions, 938 flow. Second operand has 19 states, 19 states have (on average 92.63157894736842) internal successors, (1760), 19 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:20,730 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:59:20,730 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 120 [2022-01-19 08:59:20,731 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:59:20,971 INFO L129 PetriNetUnfolder]: 75/637 cut-off events. [2022-01-19 08:59:20,971 INFO L130 PetriNetUnfolder]: For 1270/1287 co-relation queries the response was YES. [2022-01-19 08:59:20,974 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1506 conditions, 637 events. 75/637 cut-off events. For 1270/1287 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3665 event pairs, 8 based on Foata normal form. 1/588 useless extension candidates. Maximal degree in co-relation 1480. Up to 152 conditions per place. [2022-01-19 08:59:20,976 INFO L132 encePairwiseOnDemand]: 109/120 looper letters, 56 selfloop transitions, 11 changer transitions 8/156 dead transitions. [2022-01-19 08:59:20,976 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 156 transitions, 978 flow [2022-01-19 08:59:20,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-19 08:59:20,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-01-19 08:59:20,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1116 transitions. [2022-01-19 08:59:20,978 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.775 [2022-01-19 08:59:20,978 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1116 transitions. [2022-01-19 08:59:20,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1116 transitions. [2022-01-19 08:59:20,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:59:20,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1116 transitions. [2022-01-19 08:59:20,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 93.0) internal successors, (1116), 12 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:20,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 120.0) internal successors, (1560), 13 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:20,983 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 120.0) internal successors, (1560), 13 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:20,983 INFO L186 Difference]: Start difference. First operand has 177 places, 164 transitions, 938 flow. Second operand 12 states and 1116 transitions. [2022-01-19 08:59:20,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 156 transitions, 978 flow [2022-01-19 08:59:20,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 156 transitions, 909 flow, removed 19 selfloop flow, removed 19 redundant places. [2022-01-19 08:59:20,989 INFO L242 Difference]: Finished difference. Result has 161 places, 144 transitions, 749 flow [2022-01-19 08:59:20,990 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=749, PETRI_PLACES=161, PETRI_TRANSITIONS=144} [2022-01-19 08:59:20,990 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 54 predicate places. [2022-01-19 08:59:20,990 INFO L470 AbstractCegarLoop]: Abstraction has has 161 places, 144 transitions, 749 flow [2022-01-19 08:59:20,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 92.63157894736842) internal successors, (1760), 19 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:20,991 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:59:20,991 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:59:21,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-19 08:59:21,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:59:21,207 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:59:21,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:59:21,208 INFO L85 PathProgramCache]: Analyzing trace with hash -733108111, now seen corresponding path program 5 times [2022-01-19 08:59:21,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:59:21,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046999394] [2022-01-19 08:59:21,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:59:21,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:59:21,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:59:21,756 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:59:21,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:59:21,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046999394] [2022-01-19 08:59:21,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046999394] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:59:21,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362980476] [2022-01-19 08:59:21,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 08:59:21,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:59:21,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:59:21,760 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) [2022-01-19 08:59:21,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-19 08:59:21,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 08:59:21,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:59:21,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 45 conjunts are in the unsatisfiable core [2022-01-19 08:59:21,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:59:21,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-19 08:59:22,064 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 08:59:22,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 11 [2022-01-19 08:59:22,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-19 08:59:22,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-19 08:59:22,919 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:59:22,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:59:23,146 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:59:23,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 42 [2022-01-19 08:59:23,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 7 [2022-01-19 08:59:24,344 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:59:24,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362980476] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:59:24,344 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:59:24,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 58 [2022-01-19 08:59:24,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309338190] [2022-01-19 08:59:24,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:59:24,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-19 08:59:24,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:59:24,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-19 08:59:24,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=3026, Unknown=0, NotChecked=0, Total=3306 [2022-01-19 08:59:24,349 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 120 [2022-01-19 08:59:24,351 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 144 transitions, 749 flow. Second operand has 58 states, 58 states have (on average 51.6551724137931) internal successors, (2996), 58 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:24,352 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:59:24,352 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 120 [2022-01-19 08:59:24,352 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:59:28,239 INFO L129 PetriNetUnfolder]: 277/1760 cut-off events. [2022-01-19 08:59:28,239 INFO L130 PetriNetUnfolder]: For 3555/3596 co-relation queries the response was YES. [2022-01-19 08:59:28,244 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4396 conditions, 1760 events. 277/1760 cut-off events. For 3555/3596 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 15080 event pairs, 5 based on Foata normal form. 20/1653 useless extension candidates. Maximal degree in co-relation 4377. Up to 262 conditions per place. [2022-01-19 08:59:28,249 INFO L132 encePairwiseOnDemand]: 94/120 looper letters, 180 selfloop transitions, 97 changer transitions 37/356 dead transitions. [2022-01-19 08:59:28,250 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 356 transitions, 2797 flow [2022-01-19 08:59:28,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-19 08:59:28,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-01-19 08:59:28,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2720 transitions. [2022-01-19 08:59:28,255 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2022-01-19 08:59:28,255 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2720 transitions. [2022-01-19 08:59:28,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2720 transitions. [2022-01-19 08:59:28,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:59:28,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2720 transitions. [2022-01-19 08:59:28,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 53.333333333333336) internal successors, (2720), 51 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:28,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 120.0) internal successors, (6240), 52 states have internal predecessors, (6240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:28,282 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 120.0) internal successors, (6240), 52 states have internal predecessors, (6240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:28,282 INFO L186 Difference]: Start difference. First operand has 161 places, 144 transitions, 749 flow. Second operand 51 states and 2720 transitions. [2022-01-19 08:59:28,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 356 transitions, 2797 flow [2022-01-19 08:59:28,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 356 transitions, 2754 flow, removed 0 selfloop flow, removed 13 redundant places. [2022-01-19 08:59:28,293 INFO L242 Difference]: Finished difference. Result has 210 places, 209 transitions, 1768 flow [2022-01-19 08:59:28,294 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=1768, PETRI_PLACES=210, PETRI_TRANSITIONS=209} [2022-01-19 08:59:28,294 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 103 predicate places. [2022-01-19 08:59:28,294 INFO L470 AbstractCegarLoop]: Abstraction has has 210 places, 209 transitions, 1768 flow [2022-01-19 08:59:28,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 51.6551724137931) internal successors, (2996), 58 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:28,298 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:59:28,298 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:59:28,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-19 08:59:28,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:59:28,511 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:59:28,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:59:28,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1376987701, now seen corresponding path program 6 times [2022-01-19 08:59:28,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:59:28,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379896996] [2022-01-19 08:59:28,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:59:28,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:59:28,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:59:28,997 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:59:28,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:59:28,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379896996] [2022-01-19 08:59:28,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379896996] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:59:28,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975115196] [2022-01-19 08:59:28,998 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 08:59:28,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:59:28,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:59:28,999 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) [2022-01-19 08:59:29,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-19 08:59:29,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 08:59:29,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:59:29,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 53 conjunts are in the unsatisfiable core [2022-01-19 08:59:29,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:59:29,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 11 [2022-01-19 08:59:29,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 [2022-01-19 08:59:30,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 [2022-01-19 08:59:30,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-19 08:59:30,277 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:59:30,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:59:31,262 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:59:31,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 62 treesize of output 50 [2022-01-19 08:59:31,277 INFO L353 Elim1Store]: treesize reduction 11, result has 38.9 percent of original size [2022-01-19 08:59:31,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 316 treesize of output 287 [2022-01-19 08:59:31,287 INFO L353 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-01-19 08:59:31,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 280 treesize of output 252 [2022-01-19 08:59:31,296 INFO L353 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-01-19 08:59:31,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 252 treesize of output 196 [2022-01-19 08:59:32,026 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:59:32,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975115196] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:59:32,026 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:59:32,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 26, 23] total 61 [2022-01-19 08:59:32,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084720462] [2022-01-19 08:59:32,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:59:32,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-19 08:59:32,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:59:32,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-19 08:59:32,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=3186, Unknown=34, NotChecked=0, Total=3660 [2022-01-19 08:59:32,035 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 120 [2022-01-19 08:59:32,037 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 209 transitions, 1768 flow. Second operand has 61 states, 61 states have (on average 53.50819672131148) internal successors, (3264), 61 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:32,037 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:59:32,037 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 120 [2022-01-19 08:59:32,037 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:59:37,529 INFO L129 PetriNetUnfolder]: 649/3870 cut-off events. [2022-01-19 08:59:37,529 INFO L130 PetriNetUnfolder]: For 18057/18146 co-relation queries the response was YES. [2022-01-19 08:59:37,544 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12019 conditions, 3870 events. 649/3870 cut-off events. For 18057/18146 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 41019 event pairs, 0 based on Foata normal form. 82/3673 useless extension candidates. Maximal degree in co-relation 11979. Up to 686 conditions per place. [2022-01-19 08:59:37,558 INFO L132 encePairwiseOnDemand]: 91/120 looper letters, 263 selfloop transitions, 209 changer transitions 82/599 dead transitions. [2022-01-19 08:59:37,559 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 599 transitions, 6377 flow [2022-01-19 08:59:37,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-19 08:59:37,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2022-01-19 08:59:37,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 4614 transitions. [2022-01-19 08:59:37,565 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.46325301204819275 [2022-01-19 08:59:37,565 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 4614 transitions. [2022-01-19 08:59:37,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 4614 transitions. [2022-01-19 08:59:37,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:59:37,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 4614 transitions. [2022-01-19 08:59:37,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 55.59036144578313) internal successors, (4614), 83 states have internal predecessors, (4614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:37,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 120.0) internal successors, (10080), 84 states have internal predecessors, (10080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:37,584 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 120.0) internal successors, (10080), 84 states have internal predecessors, (10080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:37,584 INFO L186 Difference]: Start difference. First operand has 210 places, 209 transitions, 1768 flow. Second operand 83 states and 4614 transitions. [2022-01-19 08:59:37,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 599 transitions, 6377 flow [2022-01-19 08:59:37,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 599 transitions, 5896 flow, removed 221 selfloop flow, removed 25 redundant places. [2022-01-19 08:59:37,634 INFO L242 Difference]: Finished difference. Result has 303 places, 325 transitions, 3981 flow [2022-01-19 08:59:37,635 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=1540, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=3981, PETRI_PLACES=303, PETRI_TRANSITIONS=325} [2022-01-19 08:59:37,636 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 196 predicate places. [2022-01-19 08:59:37,636 INFO L470 AbstractCegarLoop]: Abstraction has has 303 places, 325 transitions, 3981 flow [2022-01-19 08:59:37,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 53.50819672131148) internal successors, (3264), 61 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:37,637 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:59:37,638 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:59:37,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-19 08:59:37,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:59:37,864 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:59:37,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:59:37,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1201112641, now seen corresponding path program 7 times [2022-01-19 08:59:37,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:59:37,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006364009] [2022-01-19 08:59:37,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:59:37,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:59:37,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:59:38,427 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:59:38,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:59:38,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006364009] [2022-01-19 08:59:38,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006364009] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:59:38,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503716032] [2022-01-19 08:59:38,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 08:59:38,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:59:38,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:59:38,430 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) [2022-01-19 08:59:38,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-19 08:59:38,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:59:38,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-19 08:59:38,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:59:39,154 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-19 08:59:39,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 10 [2022-01-19 08:59:39,177 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:59:39,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:59:39,252 INFO L353 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-01-19 08:59:39,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 15 [2022-01-19 08:59:40,243 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:59:40,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503716032] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:59:40,243 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:59:40,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 17] total 46 [2022-01-19 08:59:40,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288730669] [2022-01-19 08:59:40,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:59:40,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-19 08:59:40,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:59:40,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-19 08:59:40,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1775, Unknown=0, NotChecked=0, Total=2070 [2022-01-19 08:59:40,247 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-01-19 08:59:40,249 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 325 transitions, 3981 flow. Second operand has 46 states, 46 states have (on average 61.15217391304348) internal successors, (2813), 46 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:40,249 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:59:40,249 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-01-19 08:59:40,249 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:59:43,344 INFO L129 PetriNetUnfolder]: 344/2274 cut-off events. [2022-01-19 08:59:43,344 INFO L130 PetriNetUnfolder]: For 22510/22561 co-relation queries the response was YES. [2022-01-19 08:59:43,359 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8331 conditions, 2274 events. 344/2274 cut-off events. For 22510/22561 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 21108 event pairs, 0 based on Foata normal form. 55/2154 useless extension candidates. Maximal degree in co-relation 8254. Up to 320 conditions per place. [2022-01-19 08:59:43,367 INFO L132 encePairwiseOnDemand]: 93/120 looper letters, 148 selfloop transitions, 103 changer transitions 74/373 dead transitions. [2022-01-19 08:59:43,367 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 373 transitions, 4638 flow [2022-01-19 08:59:43,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-19 08:59:43,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-01-19 08:59:43,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3354 transitions. [2022-01-19 08:59:43,374 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5175925925925926 [2022-01-19 08:59:43,375 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3354 transitions. [2022-01-19 08:59:43,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3354 transitions. [2022-01-19 08:59:43,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:59:43,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3354 transitions. [2022-01-19 08:59:43,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 62.111111111111114) internal successors, (3354), 54 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:43,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 120.0) internal successors, (6600), 55 states have internal predecessors, (6600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:43,390 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 120.0) internal successors, (6600), 55 states have internal predecessors, (6600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:43,390 INFO L186 Difference]: Start difference. First operand has 303 places, 325 transitions, 3981 flow. Second operand 54 states and 3354 transitions. [2022-01-19 08:59:43,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 373 transitions, 4638 flow [2022-01-19 08:59:43,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 373 transitions, 3992 flow, removed 264 selfloop flow, removed 59 redundant places. [2022-01-19 08:59:43,486 INFO L242 Difference]: Finished difference. Result has 281 places, 231 transitions, 2400 flow [2022-01-19 08:59:43,486 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=2062, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=2400, PETRI_PLACES=281, PETRI_TRANSITIONS=231} [2022-01-19 08:59:43,487 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 174 predicate places. [2022-01-19 08:59:43,487 INFO L470 AbstractCegarLoop]: Abstraction has has 281 places, 231 transitions, 2400 flow [2022-01-19 08:59:43,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 61.15217391304348) internal successors, (2813), 46 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:43,488 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:59:43,488 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:59:43,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-19 08:59:43,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:59:43,703 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:59:43,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:59:43,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1612226681, now seen corresponding path program 8 times [2022-01-19 08:59:43,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:59:43,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260455081] [2022-01-19 08:59:43,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:59:43,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:59:43,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:59:44,287 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:59:44,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:59:44,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260455081] [2022-01-19 08:59:44,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260455081] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:59:44,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567852017] [2022-01-19 08:59:44,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:59:44,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:59:44,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:59:44,289 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) [2022-01-19 08:59:44,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-19 08:59:44,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:59:44,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:59:44,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-19 08:59:44,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:59:44,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 11 [2022-01-19 08:59:45,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 [2022-01-19 08:59:45,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 08:59:45,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-19 08:59:45,687 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-19 08:59:45,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 10 [2022-01-19 08:59:45,715 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:59:45,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:59:45,841 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_262 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_262) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)) 5)) is different from false [2022-01-19 08:59:46,938 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:59:46,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 58 treesize of output 46 [2022-01-19 08:59:46,947 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:59:46,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 186 treesize of output 177 [2022-01-19 08:59:46,956 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:59:46,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 93 treesize of output 90 [2022-01-19 08:59:46,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 122 treesize of output 94 [2022-01-19 08:59:48,047 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-01-19 08:59:48,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567852017] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:59:48,047 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:59:48,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26, 26] total 66 [2022-01-19 08:59:48,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896877506] [2022-01-19 08:59:48,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:59:48,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-19 08:59:48,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:59:48,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-19 08:59:48,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=3882, Unknown=4, NotChecked=126, Total=4290 [2022-01-19 08:59:48,052 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 120 [2022-01-19 08:59:48,054 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 231 transitions, 2400 flow. Second operand has 66 states, 66 states have (on average 50.42424242424242) internal successors, (3328), 66 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:48,054 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:59:48,054 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 120 [2022-01-19 08:59:48,054 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:59:51,043 INFO L129 PetriNetUnfolder]: 333/2084 cut-off events. [2022-01-19 08:59:51,043 INFO L130 PetriNetUnfolder]: For 15546/15593 co-relation queries the response was YES. [2022-01-19 08:59:51,053 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7286 conditions, 2084 events. 333/2084 cut-off events. For 15546/15593 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 18937 event pairs, 6 based on Foata normal form. 16/1945 useless extension candidates. Maximal degree in co-relation 7221. Up to 317 conditions per place. [2022-01-19 08:59:51,059 INFO L132 encePairwiseOnDemand]: 91/120 looper letters, 134 selfloop transitions, 111 changer transitions 18/305 dead transitions. [2022-01-19 08:59:51,059 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 305 transitions, 3567 flow [2022-01-19 08:59:51,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-19 08:59:51,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-01-19 08:59:51,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1783 transitions. [2022-01-19 08:59:51,062 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43700980392156863 [2022-01-19 08:59:51,062 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1783 transitions. [2022-01-19 08:59:51,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1783 transitions. [2022-01-19 08:59:51,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:59:51,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1783 transitions. [2022-01-19 08:59:51,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.44117647058823) internal successors, (1783), 34 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:51,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 120.0) internal successors, (4200), 35 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:51,069 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 120.0) internal successors, (4200), 35 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:51,069 INFO L186 Difference]: Start difference. First operand has 281 places, 231 transitions, 2400 flow. Second operand 34 states and 1783 transitions. [2022-01-19 08:59:51,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 305 transitions, 3567 flow [2022-01-19 08:59:51,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 305 transitions, 3217 flow, removed 100 selfloop flow, removed 45 redundant places. [2022-01-19 08:59:51,125 INFO L242 Difference]: Finished difference. Result has 255 places, 238 transitions, 2511 flow [2022-01-19 08:59:51,126 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=2177, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2511, PETRI_PLACES=255, PETRI_TRANSITIONS=238} [2022-01-19 08:59:51,126 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 148 predicate places. [2022-01-19 08:59:51,126 INFO L470 AbstractCegarLoop]: Abstraction has has 255 places, 238 transitions, 2511 flow [2022-01-19 08:59:51,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 50.42424242424242) internal successors, (3328), 66 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:51,127 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:59:51,127 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:59:51,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-19 08:59:51,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-19 08:59:51,332 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:59:51,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:59:51,332 INFO L85 PathProgramCache]: Analyzing trace with hash -245402275, now seen corresponding path program 9 times [2022-01-19 08:59:51,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:59:51,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666004928] [2022-01-19 08:59:51,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:59:51,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:59:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:59:51,845 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:59:51,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:59:51,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666004928] [2022-01-19 08:59:51,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666004928] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:59:51,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547740316] [2022-01-19 08:59:51,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 08:59:51,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:59:51,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:59:51,848 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) [2022-01-19 08:59:51,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-19 08:59:52,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 08:59:52,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:59:52,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 56 conjunts are in the unsatisfiable core [2022-01-19 08:59:52,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:59:52,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-19 08:59:52,315 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 08:59:52,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 11 [2022-01-19 08:59:52,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-19 08:59:52,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 [2022-01-19 08:59:53,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-19 08:59:53,296 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-19 08:59:53,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 10 [2022-01-19 08:59:53,315 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:59:53,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:59:54,805 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:59:54,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 58 treesize of output 46 [2022-01-19 08:59:54,812 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:59:54,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 180 treesize of output 172 [2022-01-19 08:59:54,821 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:59:54,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 91 treesize of output 89 [2022-01-19 08:59:54,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 118 treesize of output 94 [2022-01-19 08:59:56,629 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:59:56,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547740316] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:59:56,629 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:59:56,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26, 26] total 66 [2022-01-19 08:59:56,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114645321] [2022-01-19 08:59:56,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:59:56,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-19 08:59:56,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:59:56,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-19 08:59:56,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=3969, Unknown=20, NotChecked=0, Total=4290 [2022-01-19 08:59:56,632 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 120 [2022-01-19 08:59:56,634 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 238 transitions, 2511 flow. Second operand has 66 states, 66 states have (on average 50.42424242424242) internal successors, (3328), 66 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:56,634 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:59:56,634 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 120 [2022-01-19 08:59:56,634 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:00:04,708 WARN L228 SmtUtils]: Spent 6.20s on a formula simplification. DAG size of input: 84 DAG size of output: 77 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-19 09:00:06,654 INFO L129 PetriNetUnfolder]: 387/2434 cut-off events. [2022-01-19 09:00:06,654 INFO L130 PetriNetUnfolder]: For 15975/16031 co-relation queries the response was YES. [2022-01-19 09:00:06,665 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8093 conditions, 2434 events. 387/2434 cut-off events. For 15975/16031 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 23283 event pairs, 6 based on Foata normal form. 17/2256 useless extension candidates. Maximal degree in co-relation 8038. Up to 471 conditions per place. [2022-01-19 09:00:06,673 INFO L132 encePairwiseOnDemand]: 89/120 looper letters, 171 selfloop transitions, 108 changer transitions 31/352 dead transitions. [2022-01-19 09:00:06,673 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 352 transitions, 4018 flow [2022-01-19 09:00:06,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-19 09:00:06,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-01-19 09:00:06,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2240 transitions. [2022-01-19 09:00:06,677 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2022-01-19 09:00:06,677 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2240 transitions. [2022-01-19 09:00:06,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2240 transitions. [2022-01-19 09:00:06,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:00:06,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2240 transitions. [2022-01-19 09:00:06,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 52.093023255813954) internal successors, (2240), 43 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:00:06,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 120.0) internal successors, (5280), 44 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:00:06,685 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 120.0) internal successors, (5280), 44 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:00:06,685 INFO L186 Difference]: Start difference. First operand has 255 places, 238 transitions, 2511 flow. Second operand 43 states and 2240 transitions. [2022-01-19 09:00:06,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 352 transitions, 4018 flow [2022-01-19 09:00:06,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 352 transitions, 3906 flow, removed 10 selfloop flow, removed 28 redundant places. [2022-01-19 09:00:06,739 INFO L242 Difference]: Finished difference. Result has 280 places, 276 transitions, 3118 flow [2022-01-19 09:00:06,739 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=2419, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=3118, PETRI_PLACES=280, PETRI_TRANSITIONS=276} [2022-01-19 09:00:06,740 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 173 predicate places. [2022-01-19 09:00:06,740 INFO L470 AbstractCegarLoop]: Abstraction has has 280 places, 276 transitions, 3118 flow [2022-01-19 09:00:06,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 50.42424242424242) internal successors, (3328), 66 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:00:06,741 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:00:06,741 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:00:06,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-19 09:00:06,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-19 09:00:06,956 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:00:06,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:00:06,956 INFO L85 PathProgramCache]: Analyzing trace with hash 640635893, now seen corresponding path program 10 times [2022-01-19 09:00:06,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:00:06,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763332683] [2022-01-19 09:00:06,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:00:06,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:00:06,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:00:07,023 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 09:00:07,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:00:07,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763332683] [2022-01-19 09:00:07,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763332683] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:00:07,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097457492] [2022-01-19 09:00:07,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 09:00:07,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:00:07,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:00:07,025 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) [2022-01-19 09:00:07,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-19 09:00:07,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 09:00:07,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:00:07,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-19 09:00:07,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:00:07,606 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:00:07,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:00:08,206 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:00:08,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097457492] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:00:08,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:00:08,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 14, 14] total 28 [2022-01-19 09:00:08,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191920339] [2022-01-19 09:00:08,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:00:08,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-19 09:00:08,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:00:08,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-19 09:00:08,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2022-01-19 09:00:08,209 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 120 [2022-01-19 09:00:08,211 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 276 transitions, 3118 flow. Second operand has 28 states, 28 states have (on average 90.89285714285714) internal successors, (2545), 28 states have internal predecessors, (2545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:00:08,211 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:00:08,211 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 120 [2022-01-19 09:00:08,211 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:00:09,014 INFO L129 PetriNetUnfolder]: 416/3077 cut-off events. [2022-01-19 09:00:09,014 INFO L130 PetriNetUnfolder]: For 32319/32410 co-relation queries the response was YES. [2022-01-19 09:00:09,030 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11990 conditions, 3077 events. 416/3077 cut-off events. For 32319/32410 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 31949 event pairs, 29 based on Foata normal form. 57/2891 useless extension candidates. Maximal degree in co-relation 11924. Up to 353 conditions per place. [2022-01-19 09:00:09,040 INFO L132 encePairwiseOnDemand]: 105/120 looper letters, 93 selfloop transitions, 119 changer transitions 58/351 dead transitions. [2022-01-19 09:00:09,040 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 351 transitions, 4994 flow [2022-01-19 09:00:09,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-19 09:00:09,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-01-19 09:00:09,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2188 transitions. [2022-01-19 09:00:09,043 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7597222222222222 [2022-01-19 09:00:09,043 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2188 transitions. [2022-01-19 09:00:09,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2188 transitions. [2022-01-19 09:00:09,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:00:09,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2188 transitions. [2022-01-19 09:00:09,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 91.16666666666667) internal successors, (2188), 24 states have internal predecessors, (2188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:00:09,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 120.0) internal successors, (3000), 25 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:00:09,049 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 120.0) internal successors, (3000), 25 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:00:09,049 INFO L186 Difference]: Start difference. First operand has 280 places, 276 transitions, 3118 flow. Second operand 24 states and 2188 transitions. [2022-01-19 09:00:09,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 351 transitions, 4994 flow [2022-01-19 09:00:09,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 351 transitions, 4778 flow, removed 32 selfloop flow, removed 35 redundant places. [2022-01-19 09:00:09,184 INFO L242 Difference]: Finished difference. Result has 264 places, 278 transitions, 3972 flow [2022-01-19 09:00:09,184 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=2649, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3972, PETRI_PLACES=264, PETRI_TRANSITIONS=278} [2022-01-19 09:00:09,185 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 157 predicate places. [2022-01-19 09:00:09,185 INFO L470 AbstractCegarLoop]: Abstraction has has 264 places, 278 transitions, 3972 flow [2022-01-19 09:00:09,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 90.89285714285714) internal successors, (2545), 28 states have internal predecessors, (2545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:00:09,185 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:00:09,185 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:00:09,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-19 09:00:09,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-19 09:00:09,399 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:00:09,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:00:09,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1741611630, now seen corresponding path program 11 times [2022-01-19 09:00:09,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:00:09,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948776535] [2022-01-19 09:00:09,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:00:09,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:00:09,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:00:10,397 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:00:10,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:00:10,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948776535] [2022-01-19 09:00:10,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948776535] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:00:10,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614678573] [2022-01-19 09:00:10,397 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 09:00:10,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:00:10,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:00:10,398 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) [2022-01-19 09:00:10,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-19 09:00:10,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-19 09:00:10,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:00:10,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-19 09:00:10,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:00:10,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-19 09:00:10,741 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 09:00:10,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 11 [2022-01-19 09:00:11,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-19 09:00:11,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-19 09:00:11,525 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:00:11,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:00:11,594 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_357 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_357) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) is different from false [2022-01-19 09:00:11,670 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 09:00:11,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 42 [2022-01-19 09:00:11,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 7 [2022-01-19 09:00:13,077 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:00:13,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614678573] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:00:13,077 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:00:13,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 65 [2022-01-19 09:00:13,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925250590] [2022-01-19 09:00:13,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:00:13,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-19 09:00:13,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:00:13,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-19 09:00:13,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=3711, Unknown=1, NotChecked=124, Total=4160 [2022-01-19 09:00:13,081 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 120 [2022-01-19 09:00:13,082 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 278 transitions, 3972 flow. Second operand has 65 states, 65 states have (on average 51.53846153846154) internal successors, (3350), 65 states have internal predecessors, (3350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:00:13,082 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:00:13,082 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 120 [2022-01-19 09:00:13,082 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:00:16,037 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_357 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_357) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))))) (and .cse0 (or .cse0 (not (< c_~back~0 c_~n~0)) (not (<= 0 c_~back~0))))) is different from false [2022-01-19 09:00:16,866 INFO L129 PetriNetUnfolder]: 797/4372 cut-off events. [2022-01-19 09:00:16,866 INFO L130 PetriNetUnfolder]: For 53902/54132 co-relation queries the response was YES. [2022-01-19 09:00:16,893 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19628 conditions, 4372 events. 797/4372 cut-off events. For 53902/54132 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 48169 event pairs, 35 based on Foata normal form. 42/4084 useless extension candidates. Maximal degree in co-relation 19565. Up to 1243 conditions per place. [2022-01-19 09:00:16,909 INFO L132 encePairwiseOnDemand]: 91/120 looper letters, 247 selfloop transitions, 190 changer transitions 30/509 dead transitions. [2022-01-19 09:00:16,909 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 509 transitions, 8648 flow [2022-01-19 09:00:16,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-19 09:00:16,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-01-19 09:00:16,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2545 transitions. [2022-01-19 09:00:16,914 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4418402777777778 [2022-01-19 09:00:16,914 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2545 transitions. [2022-01-19 09:00:16,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2545 transitions. [2022-01-19 09:00:16,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:00:16,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2545 transitions. [2022-01-19 09:00:16,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 53.020833333333336) internal successors, (2545), 48 states have internal predecessors, (2545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:00:16,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 120.0) internal successors, (5880), 49 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:00:16,923 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 120.0) internal successors, (5880), 49 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:00:16,923 INFO L186 Difference]: Start difference. First operand has 264 places, 278 transitions, 3972 flow. Second operand 48 states and 2545 transitions. [2022-01-19 09:00:16,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 509 transitions, 8648 flow [2022-01-19 09:00:17,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 509 transitions, 7682 flow, removed 366 selfloop flow, removed 36 redundant places. [2022-01-19 09:00:17,123 INFO L242 Difference]: Finished difference. Result has 265 places, 439 transitions, 7126 flow [2022-01-19 09:00:17,123 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=3644, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=7126, PETRI_PLACES=265, PETRI_TRANSITIONS=439} [2022-01-19 09:00:17,123 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 158 predicate places. [2022-01-19 09:00:17,123 INFO L470 AbstractCegarLoop]: Abstraction has has 265 places, 439 transitions, 7126 flow [2022-01-19 09:00:17,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 51.53846153846154) internal successors, (3350), 65 states have internal predecessors, (3350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:00:17,124 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:00:17,124 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:00:17,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-19 09:00:17,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-19 09:00:17,325 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:00:17,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:00:17,325 INFO L85 PathProgramCache]: Analyzing trace with hash -749571258, now seen corresponding path program 12 times [2022-01-19 09:00:17,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:00:17,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764547578] [2022-01-19 09:00:17,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:00:17,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:00:17,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:00:18,057 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:00:18,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:00:18,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764547578] [2022-01-19 09:00:18,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764547578] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:00:18,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605879624] [2022-01-19 09:00:18,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 09:00:18,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:00:18,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:00:18,059 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) [2022-01-19 09:00:18,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-19 09:00:18,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-19 09:00:18,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:00:18,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-19 09:00:18,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:00:18,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-19 09:00:18,324 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 09:00:18,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 11 [2022-01-19 09:00:18,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-19 09:00:18,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-19 09:00:18,743 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-19 09:00:18,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:00:18,801 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_391 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_391) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) is different from false [2022-01-19 09:00:18,819 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 09:00:18,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 42 [2022-01-19 09:00:18,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 7 [2022-01-19 09:00:19,241 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 4 not checked. [2022-01-19 09:00:19,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605879624] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:00:19,242 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:00:19,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 14, 14] total 37 [2022-01-19 09:00:19,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630472233] [2022-01-19 09:00:19,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:00:19,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-19 09:00:19,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:00:19,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-19 09:00:19,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1161, Unknown=1, NotChecked=68, Total=1332 [2022-01-19 09:00:19,244 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 120 [2022-01-19 09:00:19,245 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 439 transitions, 7126 flow. Second operand has 37 states, 37 states have (on average 52.54054054054054) internal successors, (1944), 37 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:00:19,245 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:00:19,245 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 120 [2022-01-19 09:00:19,245 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:00:21,391 INFO L129 PetriNetUnfolder]: 854/4823 cut-off events. [2022-01-19 09:00:21,391 INFO L130 PetriNetUnfolder]: For 48951/49099 co-relation queries the response was YES. [2022-01-19 09:00:21,477 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20497 conditions, 4823 events. 854/4823 cut-off events. For 48951/49099 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 54730 event pairs, 4 based on Foata normal form. 47/4498 useless extension candidates. Maximal degree in co-relation 20431. Up to 1026 conditions per place. [2022-01-19 09:00:21,493 INFO L132 encePairwiseOnDemand]: 98/120 looper letters, 327 selfloop transitions, 148 changer transitions 14/531 dead transitions. [2022-01-19 09:00:21,493 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 531 transitions, 9275 flow [2022-01-19 09:00:21,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-19 09:00:21,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-01-19 09:00:21,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1788 transitions. [2022-01-19 09:00:21,495 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43823529411764706 [2022-01-19 09:00:21,496 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1788 transitions. [2022-01-19 09:00:21,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1788 transitions. [2022-01-19 09:00:21,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:00:21,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1788 transitions. [2022-01-19 09:00:21,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.588235294117645) internal successors, (1788), 34 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:00:21,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 120.0) internal successors, (4200), 35 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:00:21,503 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 120.0) internal successors, (4200), 35 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:00:21,504 INFO L186 Difference]: Start difference. First operand has 265 places, 439 transitions, 7126 flow. Second operand 34 states and 1788 transitions. [2022-01-19 09:00:21,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 531 transitions, 9275 flow [2022-01-19 09:00:21,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 531 transitions, 9053 flow, removed 86 selfloop flow, removed 21 redundant places. [2022-01-19 09:00:21,707 INFO L242 Difference]: Finished difference. Result has 278 places, 453 transitions, 7680 flow [2022-01-19 09:00:21,707 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=6947, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=7680, PETRI_PLACES=278, PETRI_TRANSITIONS=453} [2022-01-19 09:00:21,707 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 171 predicate places. [2022-01-19 09:00:21,708 INFO L470 AbstractCegarLoop]: Abstraction has has 278 places, 453 transitions, 7680 flow [2022-01-19 09:00:21,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 52.54054054054054) internal successors, (1944), 37 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:00:21,708 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:00:21,708 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:00:21,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-19 09:00:21,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-19 09:00:21,923 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:00:21,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:00:21,924 INFO L85 PathProgramCache]: Analyzing trace with hash -654771000, now seen corresponding path program 13 times [2022-01-19 09:00:21,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:00:21,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164391906] [2022-01-19 09:00:21,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:00:21,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:00:21,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:00:22,834 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:00:22,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:00:22,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164391906] [2022-01-19 09:00:22,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164391906] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:00:22,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807941825] [2022-01-19 09:00:22,835 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 09:00:22,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:00:22,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:00:22,836 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) [2022-01-19 09:00:22,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-19 09:00:22,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:00:22,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 46 conjunts are in the unsatisfiable core [2022-01-19 09:00:22,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:00:23,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 09:00:23,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-01-19 09:00:24,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-19 09:00:24,075 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:00:24,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:00:24,183 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_424 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_424) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)) 5)) is different from false [2022-01-19 09:00:24,193 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 09:00:24,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2022-01-19 09:00:24,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 7 [2022-01-19 09:00:25,564 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:00:25,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807941825] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:00:25,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:00:25,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 68 [2022-01-19 09:00:25,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637460257] [2022-01-19 09:00:25,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:00:25,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-19 09:00:25,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:00:25,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-19 09:00:25,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=4132, Unknown=1, NotChecked=130, Total=4556 [2022-01-19 09:00:25,568 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 120 [2022-01-19 09:00:25,569 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 453 transitions, 7680 flow. Second operand has 68 states, 68 states have (on average 51.55882352941177) internal successors, (3506), 68 states have internal predecessors, (3506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:00:25,569 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:00:25,569 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 120 [2022-01-19 09:00:25,569 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:00:31,551 INFO L129 PetriNetUnfolder]: 1796/9629 cut-off events. [2022-01-19 09:00:31,551 INFO L130 PetriNetUnfolder]: For 114344/114647 co-relation queries the response was YES. [2022-01-19 09:00:31,602 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43203 conditions, 9629 events. 1796/9629 cut-off events. For 114344/114647 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 124390 event pairs, 23 based on Foata normal form. 166/9074 useless extension candidates. Maximal degree in co-relation 43135. Up to 1511 conditions per place. [2022-01-19 09:00:31,633 INFO L132 encePairwiseOnDemand]: 91/120 looper letters, 382 selfloop transitions, 520 changer transitions 79/1023 dead transitions. [2022-01-19 09:00:31,633 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 1023 transitions, 19829 flow [2022-01-19 09:00:31,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-19 09:00:31,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-01-19 09:00:31,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 3528 transitions. [2022-01-19 09:00:31,638 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2022-01-19 09:00:31,638 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 3528 transitions. [2022-01-19 09:00:31,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 3528 transitions. [2022-01-19 09:00:31,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:00:31,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 3528 transitions. [2022-01-19 09:00:31,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 53.45454545454545) internal successors, (3528), 66 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:00:31,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 120.0) internal successors, (8040), 67 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:00:31,648 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 120.0) internal successors, (8040), 67 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:00:31,648 INFO L186 Difference]: Start difference. First operand has 278 places, 453 transitions, 7680 flow. Second operand 66 states and 3528 transitions. [2022-01-19 09:00:31,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 1023 transitions, 19829 flow [2022-01-19 09:00:31,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 1023 transitions, 19261 flow, removed 57 selfloop flow, removed 32 redundant places. [2022-01-19 09:00:31,994 INFO L242 Difference]: Finished difference. Result has 327 places, 762 transitions, 15770 flow [2022-01-19 09:00:31,995 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=7430, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=15770, PETRI_PLACES=327, PETRI_TRANSITIONS=762} [2022-01-19 09:00:31,995 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 220 predicate places. [2022-01-19 09:00:31,995 INFO L470 AbstractCegarLoop]: Abstraction has has 327 places, 762 transitions, 15770 flow [2022-01-19 09:00:31,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 51.55882352941177) internal successors, (3506), 68 states have internal predecessors, (3506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:00:31,996 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:00:31,996 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:00:32,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-19 09:00:32,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-19 09:00:32,197 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:00:32,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:00:32,197 INFO L85 PathProgramCache]: Analyzing trace with hash 449479964, now seen corresponding path program 14 times [2022-01-19 09:00:32,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:00:32,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319255321] [2022-01-19 09:00:32,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:00:32,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:00:32,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:00:32,916 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:00:32,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:00:32,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319255321] [2022-01-19 09:00:32,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319255321] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:00:32,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816426330] [2022-01-19 09:00:32,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 09:00:32,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:00:32,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:00:32,917 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) [2022-01-19 09:00:32,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-19 09:00:33,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 09:00:33,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:00:33,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 44 conjunts are in the unsatisfiable core [2022-01-19 09:00:33,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:00:33,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 09:00:33,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-01-19 09:00:34,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-19 09:00:34,205 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:00:34,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:00:34,446 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 09:00:34,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2022-01-19 09:00:34,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 7 [2022-01-19 09:00:35,848 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:00:35,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816426330] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:00:35,848 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:00:35,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 71 [2022-01-19 09:00:35,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630521772] [2022-01-19 09:00:35,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:00:35,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-19 09:00:35,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:00:35,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-19 09:00:35,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=4536, Unknown=15, NotChecked=0, Total=4970 [2022-01-19 09:00:35,851 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 120 [2022-01-19 09:00:35,853 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 762 transitions, 15770 flow. Second operand has 71 states, 71 states have (on average 51.49295774647887) internal successors, (3656), 71 states have internal predecessors, (3656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:00:35,853 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:00:35,853 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 120 [2022-01-19 09:00:35,853 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:00:46,265 INFO L129 PetriNetUnfolder]: 2531/14511 cut-off events. [2022-01-19 09:00:46,265 INFO L130 PetriNetUnfolder]: For 240185/241123 co-relation queries the response was YES. [2022-01-19 09:00:46,365 INFO L84 FinitePrefix]: Finished finitePrefix Result has 71189 conditions, 14511 events. 2531/14511 cut-off events. For 240185/241123 co-relation queries the response was YES. Maximal size of possible extension queue 852. Compared 201681 event pairs, 31 based on Foata normal form. 258/13687 useless extension candidates. Maximal degree in co-relation 71107. Up to 2319 conditions per place. [2022-01-19 09:00:46,410 INFO L132 encePairwiseOnDemand]: 91/120 looper letters, 496 selfloop transitions, 776 changer transitions 70/1384 dead transitions. [2022-01-19 09:00:46,410 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 1384 transitions, 29902 flow [2022-01-19 09:00:46,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-19 09:00:46,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2022-01-19 09:00:46,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 4790 transitions. [2022-01-19 09:00:46,417 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.45359848484848486 [2022-01-19 09:00:46,417 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 4790 transitions. [2022-01-19 09:00:46,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 4790 transitions. [2022-01-19 09:00:46,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:00:46,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 4790 transitions. [2022-01-19 09:00:46,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 54.43181818181818) internal successors, (4790), 88 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:00:46,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 120.0) internal successors, (10680), 89 states have internal predecessors, (10680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:00:46,433 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 120.0) internal successors, (10680), 89 states have internal predecessors, (10680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:00:46,433 INFO L186 Difference]: Start difference. First operand has 327 places, 762 transitions, 15770 flow. Second operand 88 states and 4790 transitions. [2022-01-19 09:00:46,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 1384 transitions, 29902 flow [2022-01-19 09:00:47,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 1384 transitions, 28005 flow, removed 832 selfloop flow, removed 42 redundant places. [2022-01-19 09:00:47,402 INFO L242 Difference]: Finished difference. Result has 394 places, 1056 transitions, 23626 flow [2022-01-19 09:00:47,403 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=13845, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=507, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=23626, PETRI_PLACES=394, PETRI_TRANSITIONS=1056} [2022-01-19 09:00:47,404 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 287 predicate places. [2022-01-19 09:00:47,404 INFO L470 AbstractCegarLoop]: Abstraction has has 394 places, 1056 transitions, 23626 flow [2022-01-19 09:00:47,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 51.49295774647887) internal successors, (3656), 71 states have internal predecessors, (3656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:00:47,404 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:00:47,405 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:00:47,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-19 09:00:47,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:00:47,613 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:00:47,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:00:47,614 INFO L85 PathProgramCache]: Analyzing trace with hash -7573346, now seen corresponding path program 15 times [2022-01-19 09:00:47,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:00:47,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777879341] [2022-01-19 09:00:47,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:00:47,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:00:47,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:00:48,131 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:00:48,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:00:48,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777879341] [2022-01-19 09:00:48,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777879341] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:00:48,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375768084] [2022-01-19 09:00:48,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 09:00:48,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:00:48,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:00:48,132 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) [2022-01-19 09:00:48,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-19 09:00:48,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-19 09:00:48,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:00:48,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-19 09:00:48,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:00:48,761 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-19 09:00:48,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 10 [2022-01-19 09:00:48,791 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-19 09:00:48,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:00:49,022 INFO L353 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-01-19 09:00:49,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 15 [2022-01-19 09:00:49,416 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-19 09:00:49,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375768084] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:00:49,416 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:00:49,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 10, 11] total 37 [2022-01-19 09:00:49,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421156314] [2022-01-19 09:00:49,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:00:49,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-19 09:00:49,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:00:49,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-19 09:00:49,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1147, Unknown=0, NotChecked=0, Total=1332 [2022-01-19 09:00:49,418 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-01-19 09:00:49,419 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 1056 transitions, 23626 flow. Second operand has 37 states, 37 states have (on average 61.945945945945944) internal successors, (2292), 37 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:00:49,419 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:00:49,419 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-01-19 09:00:49,419 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:00:56,995 INFO L129 PetriNetUnfolder]: 3341/19804 cut-off events. [2022-01-19 09:00:56,995 INFO L130 PetriNetUnfolder]: For 407503/408723 co-relation queries the response was YES. [2022-01-19 09:00:57,143 INFO L84 FinitePrefix]: Finished finitePrefix Result has 104102 conditions, 19804 events. 3341/19804 cut-off events. For 407503/408723 co-relation queries the response was YES. Maximal size of possible extension queue 1210. Compared 293154 event pairs, 198 based on Foata normal form. 214/18543 useless extension candidates. Maximal degree in co-relation 103998. Up to 5286 conditions per place. [2022-01-19 09:00:57,196 INFO L132 encePairwiseOnDemand]: 91/120 looper letters, 907 selfloop transitions, 641 changer transitions 47/1643 dead transitions. [2022-01-19 09:00:57,196 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 1643 transitions, 39248 flow [2022-01-19 09:00:57,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-19 09:00:57,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-01-19 09:00:57,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3708 transitions. [2022-01-19 09:00:57,199 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.523728813559322 [2022-01-19 09:00:57,199 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3708 transitions. [2022-01-19 09:00:57,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3708 transitions. [2022-01-19 09:00:57,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:00:57,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3708 transitions. [2022-01-19 09:00:57,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 62.847457627118644) internal successors, (3708), 59 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:00:57,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 120.0) internal successors, (7200), 60 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:00:57,209 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 120.0) internal successors, (7200), 60 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:00:57,209 INFO L186 Difference]: Start difference. First operand has 394 places, 1056 transitions, 23626 flow. Second operand 59 states and 3708 transitions. [2022-01-19 09:00:57,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 1643 transitions, 39248 flow [2022-01-19 09:01:00,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 1643 transitions, 36248 flow, removed 1386 selfloop flow, removed 43 redundant places. [2022-01-19 09:01:00,062 INFO L242 Difference]: Finished difference. Result has 431 places, 1472 transitions, 33386 flow [2022-01-19 09:01:00,063 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=21461, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1056, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=33386, PETRI_PLACES=431, PETRI_TRANSITIONS=1472} [2022-01-19 09:01:00,063 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 324 predicate places. [2022-01-19 09:01:00,063 INFO L470 AbstractCegarLoop]: Abstraction has has 431 places, 1472 transitions, 33386 flow [2022-01-19 09:01:00,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 61.945945945945944) internal successors, (2292), 37 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:01:00,064 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:01:00,064 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:01:00,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-19 09:01:00,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:01:00,264 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:01:00,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:01:00,265 INFO L85 PathProgramCache]: Analyzing trace with hash -932870588, now seen corresponding path program 16 times [2022-01-19 09:01:00,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:01:00,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560772491] [2022-01-19 09:01:00,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:01:00,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:01:00,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:01:00,847 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:01:00,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:01:00,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560772491] [2022-01-19 09:01:00,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560772491] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:01:00,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699756243] [2022-01-19 09:01:00,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 09:01:00,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:01:00,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:01:00,848 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) [2022-01-19 09:01:00,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-19 09:01:00,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 09:01:00,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:01:00,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-19 09:01:00,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:01:01,790 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-19 09:01:01,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 10 [2022-01-19 09:01:01,819 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:01:01,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:01:01,915 INFO L353 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-01-19 09:01:01,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 17 [2022-01-19 09:01:03,260 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:01:03,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699756243] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:01:03,260 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:01:03,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 21, 21] total 57 [2022-01-19 09:01:03,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755832440] [2022-01-19 09:01:03,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:01:03,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-19 09:01:03,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:01:03,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-19 09:01:03,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=2815, Unknown=0, NotChecked=0, Total=3192 [2022-01-19 09:01:03,264 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-01-19 09:01:03,265 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 1472 transitions, 33386 flow. Second operand has 57 states, 57 states have (on average 60.824561403508774) internal successors, (3467), 57 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:01:03,265 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:01:03,265 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-01-19 09:01:03,265 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:01:19,499 INFO L129 PetriNetUnfolder]: 3460/23983 cut-off events. [2022-01-19 09:01:19,499 INFO L130 PetriNetUnfolder]: For 693151/694656 co-relation queries the response was YES. [2022-01-19 09:01:19,758 INFO L84 FinitePrefix]: Finished finitePrefix Result has 139897 conditions, 23983 events. 3460/23983 cut-off events. For 693151/694656 co-relation queries the response was YES. Maximal size of possible extension queue 1104. Compared 364104 event pairs, 90 based on Foata normal form. 919/23246 useless extension candidates. Maximal degree in co-relation 139770. Up to 3397 conditions per place. [2022-01-19 09:01:19,831 INFO L132 encePairwiseOnDemand]: 90/120 looper letters, 774 selfloop transitions, 1379 changer transitions 159/2360 dead transitions. [2022-01-19 09:01:19,832 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 2360 transitions, 59314 flow [2022-01-19 09:01:19,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-19 09:01:19,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2022-01-19 09:01:19,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 8028 transitions. [2022-01-19 09:01:19,841 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.52265625 [2022-01-19 09:01:19,841 INFO L72 ComplementDD]: Start complementDD. Operand 128 states and 8028 transitions. [2022-01-19 09:01:19,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 128 states and 8028 transitions. [2022-01-19 09:01:19,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:01:19,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 128 states and 8028 transitions. [2022-01-19 09:01:19,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 129 states, 128 states have (on average 62.71875) internal successors, (8028), 128 states have internal predecessors, (8028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:01:19,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 129 states, 129 states have (on average 120.0) internal successors, (15480), 129 states have internal predecessors, (15480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:01:19,863 INFO L81 ComplementDD]: Finished complementDD. Result has 129 states, 129 states have (on average 120.0) internal successors, (15480), 129 states have internal predecessors, (15480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:01:19,863 INFO L186 Difference]: Start difference. First operand has 431 places, 1472 transitions, 33386 flow. Second operand 128 states and 8028 transitions. [2022-01-19 09:01:19,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 2360 transitions, 59314 flow [2022-01-19 09:01:24,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 2360 transitions, 57014 flow, removed 1101 selfloop flow, removed 38 redundant places. [2022-01-19 09:01:24,902 INFO L242 Difference]: Finished difference. Result has 576 places, 1886 transitions, 49385 flow [2022-01-19 09:01:24,903 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=24262, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1091, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=706, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=128, PETRI_FLOW=49385, PETRI_PLACES=576, PETRI_TRANSITIONS=1886} [2022-01-19 09:01:24,904 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 469 predicate places. [2022-01-19 09:01:24,904 INFO L470 AbstractCegarLoop]: Abstraction has has 576 places, 1886 transitions, 49385 flow [2022-01-19 09:01:24,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 60.824561403508774) internal successors, (3467), 57 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:01:24,905 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:01:24,905 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:01:24,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-19 09:01:25,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:01:25,107 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:01:25,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:01:25,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1522031198, now seen corresponding path program 17 times [2022-01-19 09:01:25,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:01:25,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862581218] [2022-01-19 09:01:25,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:01:25,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:01:25,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:01:25,629 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:01:25,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:01:25,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862581218] [2022-01-19 09:01:25,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862581218] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:01:25,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121524214] [2022-01-19 09:01:25,630 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 09:01:25,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:01:25,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:01:25,631 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) [2022-01-19 09:01:25,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-19 09:01:25,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-19 09:01:25,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:01:25,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-19 09:01:25,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:01:26,166 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-19 09:01:26,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 10 [2022-01-19 09:01:26,187 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-19 09:01:26,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:01:26,271 INFO L353 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-01-19 09:01:26,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 17 [2022-01-19 09:01:26,528 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-19 09:01:26,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121524214] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:01:26,528 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:01:26,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 11, 10] total 33 [2022-01-19 09:01:26,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071665874] [2022-01-19 09:01:26,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:01:26,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-19 09:01:26,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:01:26,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-19 09:01:26,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=967, Unknown=0, NotChecked=0, Total=1056 [2022-01-19 09:01:26,530 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-01-19 09:01:26,531 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 576 places, 1886 transitions, 49385 flow. Second operand has 33 states, 33 states have (on average 61.333333333333336) internal successors, (2024), 33 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:01:26,531 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:01:26,531 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-01-19 09:01:26,531 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:01:41,163 INFO L129 PetriNetUnfolder]: 3601/25283 cut-off events. [2022-01-19 09:01:41,163 INFO L130 PetriNetUnfolder]: For 1182874/1185701 co-relation queries the response was YES. [2022-01-19 09:01:41,498 INFO L84 FinitePrefix]: Finished finitePrefix Result has 166845 conditions, 25283 events. 3601/25283 cut-off events. For 1182874/1185701 co-relation queries the response was YES. Maximal size of possible extension queue 1171. Compared 389200 event pairs, 213 based on Foata normal form. 468/23793 useless extension candidates. Maximal degree in co-relation 166660. Up to 7006 conditions per place. [2022-01-19 09:01:41,564 INFO L132 encePairwiseOnDemand]: 98/120 looper letters, 1366 selfloop transitions, 519 changer transitions 269/2202 dead transitions. [2022-01-19 09:01:41,564 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 595 places, 2202 transitions, 62174 flow [2022-01-19 09:01:41,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-19 09:01:41,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-01-19 09:01:41,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3479 transitions. [2022-01-19 09:01:41,566 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5271212121212121 [2022-01-19 09:01:41,566 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3479 transitions. [2022-01-19 09:01:41,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3479 transitions. [2022-01-19 09:01:41,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:01:41,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3479 transitions. [2022-01-19 09:01:41,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 63.25454545454546) internal successors, (3479), 55 states have internal predecessors, (3479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:01:41,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 120.0) internal successors, (6720), 56 states have internal predecessors, (6720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:01:41,573 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 120.0) internal successors, (6720), 56 states have internal predecessors, (6720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:01:41,573 INFO L186 Difference]: Start difference. First operand has 576 places, 1886 transitions, 49385 flow. Second operand 55 states and 3479 transitions. [2022-01-19 09:01:41,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 595 places, 2202 transitions, 62174 flow [2022-01-19 09:01:50,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 2202 transitions, 56820 flow, removed 2495 selfloop flow, removed 68 redundant places. [2022-01-19 09:01:50,095 INFO L242 Difference]: Finished difference. Result has 535 places, 1784 transitions, 44447 flow [2022-01-19 09:01:50,096 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=43425, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1823, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=407, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=44447, PETRI_PLACES=535, PETRI_TRANSITIONS=1784} [2022-01-19 09:01:50,097 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 428 predicate places. [2022-01-19 09:01:50,097 INFO L470 AbstractCegarLoop]: Abstraction has has 535 places, 1784 transitions, 44447 flow [2022-01-19 09:01:50,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 61.333333333333336) internal successors, (2024), 33 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:01:50,097 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:01:50,098 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:01:50,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-19 09:01:50,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:01:50,320 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:01:50,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:01:50,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1182897000, now seen corresponding path program 18 times [2022-01-19 09:01:50,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:01:50,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140127919] [2022-01-19 09:01:50,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:01:50,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:01:50,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:01:50,868 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:01:50,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:01:50,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140127919] [2022-01-19 09:01:50,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140127919] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:01:50,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088365592] [2022-01-19 09:01:50,869 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 09:01:50,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:01:50,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:01:50,870 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) [2022-01-19 09:01:50,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-19 09:01:51,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-19 09:01:51,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:01:51,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-19 09:01:51,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:01:51,955 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-19 09:01:51,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 10 [2022-01-19 09:01:51,975 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-19 09:01:51,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:01:52,205 INFO L353 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-01-19 09:01:52,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 15 [2022-01-19 09:01:53,068 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-19 09:01:53,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088365592] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:01:53,068 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:01:53,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20, 20] total 56 [2022-01-19 09:01:53,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145991540] [2022-01-19 09:01:53,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:01:53,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-19 09:01:53,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:01:53,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-19 09:01:53,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=2682, Unknown=0, NotChecked=0, Total=3080 [2022-01-19 09:01:53,072 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-01-19 09:01:53,073 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 1784 transitions, 44447 flow. Second operand has 56 states, 56 states have (on average 60.964285714285715) internal successors, (3414), 56 states have internal predecessors, (3414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:01:53,073 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:01:53,074 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-01-19 09:01:53,074 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:02:06,479 INFO L129 PetriNetUnfolder]: 3648/25531 cut-off events. [2022-01-19 09:02:06,479 INFO L130 PetriNetUnfolder]: For 1068911/1071379 co-relation queries the response was YES. [2022-01-19 09:02:06,767 INFO L84 FinitePrefix]: Finished finitePrefix Result has 156311 conditions, 25531 events. 3648/25531 cut-off events. For 1068911/1071379 co-relation queries the response was YES. Maximal size of possible extension queue 1175. Compared 393254 event pairs, 47 based on Foata normal form. 529/24131 useless extension candidates. Maximal degree in co-relation 156156. Up to 3519 conditions per place. [2022-01-19 09:02:06,828 INFO L132 encePairwiseOnDemand]: 89/120 looper letters, 832 selfloop transitions, 1009 changer transitions 185/2074 dead transitions. [2022-01-19 09:02:06,828 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 2074 transitions, 55510 flow [2022-01-19 09:02:06,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-19 09:02:06,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-01-19 09:02:06,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3550 transitions. [2022-01-19 09:02:06,831 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5190058479532164 [2022-01-19 09:02:06,831 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3550 transitions. [2022-01-19 09:02:06,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3550 transitions. [2022-01-19 09:02:06,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:02:06,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3550 transitions. [2022-01-19 09:02:06,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 62.280701754385966) internal successors, (3550), 57 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:02:06,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 120.0) internal successors, (6960), 58 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:02:06,840 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 120.0) internal successors, (6960), 58 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:02:06,840 INFO L186 Difference]: Start difference. First operand has 535 places, 1784 transitions, 44447 flow. Second operand 57 states and 3550 transitions. [2022-01-19 09:02:06,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 2074 transitions, 55510 flow [2022-01-19 09:02:12,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 2074 transitions, 54646 flow, removed 276 selfloop flow, removed 40 redundant places. [2022-01-19 09:02:12,704 INFO L242 Difference]: Finished difference. Result has 531 places, 1798 transitions, 48325 flow [2022-01-19 09:02:12,705 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=43995, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1784, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=917, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=854, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=48325, PETRI_PLACES=531, PETRI_TRANSITIONS=1798} [2022-01-19 09:02:12,706 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 424 predicate places. [2022-01-19 09:02:12,706 INFO L470 AbstractCegarLoop]: Abstraction has has 531 places, 1798 transitions, 48325 flow [2022-01-19 09:02:12,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 60.964285714285715) internal successors, (3414), 56 states have internal predecessors, (3414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:02:12,706 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:02:12,706 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:02:12,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-19 09:02:12,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:02:12,907 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:02:12,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:02:12,907 INFO L85 PathProgramCache]: Analyzing trace with hash -995908274, now seen corresponding path program 19 times [2022-01-19 09:02:12,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:02:12,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162564641] [2022-01-19 09:02:12,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:02:12,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:02:12,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:02:13,386 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:02:13,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:02:13,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162564641] [2022-01-19 09:02:13,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162564641] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:02:13,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546661851] [2022-01-19 09:02:13,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 09:02:13,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:02:13,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:02:13,387 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) [2022-01-19 09:02:13,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-19 09:02:13,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:02:13,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-19 09:02:13,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:02:14,484 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-19 09:02:14,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 10 [2022-01-19 09:02:14,507 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:02:14,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:02:14,636 INFO L353 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-01-19 09:02:14,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 17 [2022-01-19 09:02:15,523 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:02:15,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546661851] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:02:15,523 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:02:15,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 21, 21] total 57 [2022-01-19 09:02:15,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359717659] [2022-01-19 09:02:15,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:02:15,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-19 09:02:15,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:02:15,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-19 09:02:15,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=418, Invalid=2774, Unknown=0, NotChecked=0, Total=3192 [2022-01-19 09:02:15,526 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-01-19 09:02:15,527 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 1798 transitions, 48325 flow. Second operand has 57 states, 57 states have (on average 60.89473684210526) internal successors, (3471), 57 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:02:15,527 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:02:15,527 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-01-19 09:02:15,527 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:02:31,881 INFO L129 PetriNetUnfolder]: 4025/27557 cut-off events. [2022-01-19 09:02:31,882 INFO L130 PetriNetUnfolder]: For 1137197/1139780 co-relation queries the response was YES. [2022-01-19 09:02:32,216 INFO L84 FinitePrefix]: Finished finitePrefix Result has 175480 conditions, 27557 events. 4025/27557 cut-off events. For 1137197/1139780 co-relation queries the response was YES. Maximal size of possible extension queue 1337. Compared 431242 event pairs, 107 based on Foata normal form. 783/26282 useless extension candidates. Maximal degree in co-relation 175320. Up to 7228 conditions per place. [2022-01-19 09:02:32,285 INFO L132 encePairwiseOnDemand]: 89/120 looper letters, 1046 selfloop transitions, 1586 changer transitions 429/3109 dead transitions. [2022-01-19 09:02:32,286 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 618 places, 3109 transitions, 90742 flow [2022-01-19 09:02:32,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-19 09:02:32,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2022-01-19 09:02:32,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 5964 transitions. [2022-01-19 09:02:32,291 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5177083333333333 [2022-01-19 09:02:32,291 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 5964 transitions. [2022-01-19 09:02:32,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 5964 transitions. [2022-01-19 09:02:32,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:02:32,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 5964 transitions. [2022-01-19 09:02:32,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 97 states, 96 states have (on average 62.125) internal successors, (5964), 96 states have internal predecessors, (5964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:02:32,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 97 states, 97 states have (on average 120.0) internal successors, (11640), 97 states have internal predecessors, (11640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:02:32,304 INFO L81 ComplementDD]: Finished complementDD. Result has 97 states, 97 states have (on average 120.0) internal successors, (11640), 97 states have internal predecessors, (11640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:02:32,304 INFO L186 Difference]: Start difference. First operand has 531 places, 1798 transitions, 48325 flow. Second operand 96 states and 5964 transitions. [2022-01-19 09:02:32,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 618 places, 3109 transitions, 90742 flow [2022-01-19 09:02:41,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 574 places, 3109 transitions, 87744 flow, removed 1300 selfloop flow, removed 44 redundant places. [2022-01-19 09:02:41,322 INFO L242 Difference]: Finished difference. Result has 618 places, 2587 transitions, 75523 flow [2022-01-19 09:02:41,323 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=46777, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1798, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=947, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=75523, PETRI_PLACES=618, PETRI_TRANSITIONS=2587} [2022-01-19 09:02:41,324 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 511 predicate places. [2022-01-19 09:02:41,324 INFO L470 AbstractCegarLoop]: Abstraction has has 618 places, 2587 transitions, 75523 flow [2022-01-19 09:02:41,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 60.89473684210526) internal successors, (3471), 57 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:02:41,324 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:02:41,325 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:02:41,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-19 09:02:41,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:02:41,547 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:02:41,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:02:41,547 INFO L85 PathProgramCache]: Analyzing trace with hash -760549072, now seen corresponding path program 20 times [2022-01-19 09:02:41,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:02:41,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088018091] [2022-01-19 09:02:41,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:02:41,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:02:41,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:02:42,018 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:02:42,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:02:42,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088018091] [2022-01-19 09:02:42,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088018091] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:02:42,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143406885] [2022-01-19 09:02:42,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 09:02:42,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:02:42,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:02:42,025 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) [2022-01-19 09:02:42,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-19 09:02:42,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 09:02:42,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:02:42,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-19 09:02:42,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:02:43,011 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-19 09:02:43,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 10 [2022-01-19 09:02:43,039 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:02:43,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:02:43,162 INFO L353 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-01-19 09:02:43,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 17 [2022-01-19 09:02:44,427 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:02:44,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143406885] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:02:44,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:02:44,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 21, 21] total 57 [2022-01-19 09:02:44,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336150375] [2022-01-19 09:02:44,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:02:44,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-19 09:02:44,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:02:44,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-19 09:02:44,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=2838, Unknown=0, NotChecked=0, Total=3192 [2022-01-19 09:02:44,432 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-01-19 09:02:44,433 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 618 places, 2587 transitions, 75523 flow. Second operand has 57 states, 57 states have (on average 60.824561403508774) internal successors, (3467), 57 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:02:44,433 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:02:44,434 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-01-19 09:02:44,434 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:03:05,061 INFO L129 PetriNetUnfolder]: 3903/27683 cut-off events. [2022-01-19 09:03:05,061 INFO L130 PetriNetUnfolder]: For 1279424/1284213 co-relation queries the response was YES. [2022-01-19 09:03:05,525 INFO L84 FinitePrefix]: Finished finitePrefix Result has 190008 conditions, 27683 events. 3903/27683 cut-off events. For 1279424/1284213 co-relation queries the response was YES. Maximal size of possible extension queue 1230. Compared 431590 event pairs, 75 based on Foata normal form. 1242/26848 useless extension candidates. Maximal degree in co-relation 189815. Up to 3822 conditions per place. [2022-01-19 09:03:05,620 INFO L132 encePairwiseOnDemand]: 88/120 looper letters, 1303 selfloop transitions, 1709 changer transitions 142/3202 dead transitions. [2022-01-19 09:03:05,620 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 669 places, 3202 transitions, 99874 flow [2022-01-19 09:03:05,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-19 09:03:05,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-01-19 09:03:05,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 4290 transitions. [2022-01-19 09:03:05,625 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5181159420289855 [2022-01-19 09:03:05,625 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 4290 transitions. [2022-01-19 09:03:05,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 4290 transitions. [2022-01-19 09:03:05,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:03:05,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 4290 transitions. [2022-01-19 09:03:05,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 62.17391304347826) internal successors, (4290), 69 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:03:05,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 120.0) internal successors, (8400), 70 states have internal predecessors, (8400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:03:05,636 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 120.0) internal successors, (8400), 70 states have internal predecessors, (8400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:03:05,636 INFO L186 Difference]: Start difference. First operand has 618 places, 2587 transitions, 75523 flow. Second operand 69 states and 4290 transitions. [2022-01-19 09:03:05,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 669 places, 3202 transitions, 99874 flow [2022-01-19 09:03:19,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 620 places, 3202 transitions, 93319 flow, removed 3124 selfloop flow, removed 49 redundant places. [2022-01-19 09:03:19,354 INFO L242 Difference]: Finished difference. Result has 649 places, 2877 transitions, 85886 flow [2022-01-19 09:03:19,355 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=72852, PETRI_DIFFERENCE_MINUEND_PLACES=552, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1404, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=85886, PETRI_PLACES=649, PETRI_TRANSITIONS=2877} [2022-01-19 09:03:19,356 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 542 predicate places. [2022-01-19 09:03:19,356 INFO L470 AbstractCegarLoop]: Abstraction has has 649 places, 2877 transitions, 85886 flow [2022-01-19 09:03:19,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 60.824561403508774) internal successors, (3467), 57 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:03:19,356 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:03:19,357 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:03:19,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-19 09:03:19,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-19 09:03:19,559 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:03:19,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:03:19,560 INFO L85 PathProgramCache]: Analyzing trace with hash -2132022902, now seen corresponding path program 21 times [2022-01-19 09:03:19,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:03:19,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935321361] [2022-01-19 09:03:19,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:03:19,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:03:19,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:03:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:03:20,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:03:20,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935321361] [2022-01-19 09:03:20,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935321361] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:03:20,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037033624] [2022-01-19 09:03:20,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 09:03:20,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:03:20,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:03:20,053 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:03:20,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-19 09:03:20,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-19 09:03:20,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:03:20,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-19 09:03:20,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:03:20,771 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-19 09:03:20,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 10 [2022-01-19 09:03:20,789 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 09:03:20,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:03:20,916 INFO L353 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-01-19 09:03:20,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 17 [2022-01-19 09:03:21,156 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-19 09:03:21,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037033624] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:03:21,156 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:03:21,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 16, 11] total 39 [2022-01-19 09:03:21,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51393087] [2022-01-19 09:03:21,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:03:21,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-19 09:03:21,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:03:21,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-19 09:03:21,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2022-01-19 09:03:21,159 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-01-19 09:03:21,160 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 649 places, 2877 transitions, 85886 flow. Second operand has 39 states, 39 states have (on average 61.17948717948718) internal successors, (2386), 39 states have internal predecessors, (2386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:03:21,160 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:03:21,160 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-01-19 09:03:21,161 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:03:42,210 INFO L129 PetriNetUnfolder]: 4001/28304 cut-off events. [2022-01-19 09:03:42,211 INFO L130 PetriNetUnfolder]: For 1052203/1056760 co-relation queries the response was YES. [2022-01-19 09:03:42,647 INFO L84 FinitePrefix]: Finished finitePrefix Result has 185391 conditions, 28304 events. 4001/28304 cut-off events. For 1052203/1056760 co-relation queries the response was YES. Maximal size of possible extension queue 1268. Compared 443619 event pairs, 77 based on Foata normal form. 987/27193 useless extension candidates. Maximal degree in co-relation 185185. Up to 8440 conditions per place. [2022-01-19 09:03:42,727 INFO L132 encePairwiseOnDemand]: 97/120 looper letters, 2344 selfloop transitions, 768 changer transitions 92/3252 dead transitions. [2022-01-19 09:03:42,728 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 686 places, 3252 transitions, 102743 flow [2022-01-19 09:03:42,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-19 09:03:42,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-01-19 09:03:42,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3017 transitions. [2022-01-19 09:03:42,730 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5237847222222223 [2022-01-19 09:03:42,730 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3017 transitions. [2022-01-19 09:03:42,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3017 transitions. [2022-01-19 09:03:42,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:03:42,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3017 transitions. [2022-01-19 09:03:42,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 62.854166666666664) internal successors, (3017), 48 states have internal predecessors, (3017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:03:42,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 120.0) internal successors, (5880), 49 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:03:42,737 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 120.0) internal successors, (5880), 49 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:03:42,737 INFO L186 Difference]: Start difference. First operand has 649 places, 2877 transitions, 85886 flow. Second operand 48 states and 3017 transitions. [2022-01-19 09:03:42,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 686 places, 3252 transitions, 102743 flow [2022-01-19 09:03:54,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 644 places, 3252 transitions, 100166 flow, removed 1221 selfloop flow, removed 42 redundant places. [2022-01-19 09:03:54,546 INFO L242 Difference]: Finished difference. Result has 654 places, 2972 transitions, 89472 flow [2022-01-19 09:03:54,548 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=83591, PETRI_DIFFERENCE_MINUEND_PLACES=597, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2877, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=664, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=89472, PETRI_PLACES=654, PETRI_TRANSITIONS=2972} [2022-01-19 09:03:54,548 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 547 predicate places. [2022-01-19 09:03:54,548 INFO L470 AbstractCegarLoop]: Abstraction has has 654 places, 2972 transitions, 89472 flow [2022-01-19 09:03:54,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 61.17948717948718) internal successors, (2386), 39 states have internal predecessors, (2386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:03:54,549 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:03:54,549 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:03:54,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-19 09:03:54,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-01-19 09:03:54,753 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:03:54,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:03:54,753 INFO L85 PathProgramCache]: Analyzing trace with hash 909038002, now seen corresponding path program 22 times [2022-01-19 09:03:54,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:03:54,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115011973] [2022-01-19 09:03:54,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:03:54,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:03:54,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:03:55,333 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:03:55,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:03:55,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115011973] [2022-01-19 09:03:55,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115011973] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:03:55,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114460352] [2022-01-19 09:03:55,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 09:03:55,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:03:55,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:03:55,334 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:03:55,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-19 09:03:55,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 09:03:55,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:03:55,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 45 conjunts are in the unsatisfiable core [2022-01-19 09:03:55,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:03:56,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 09:03:56,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-19 09:03:56,652 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-19 09:03:56,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 10 [2022-01-19 09:03:56,672 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:03:56,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:03:56,814 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_714 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_714) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 8)) 5)) is different from false [2022-01-19 09:03:56,832 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 09:03:56,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2022-01-19 09:03:56,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 7 [2022-01-19 09:03:58,880 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:03:58,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114460352] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:03:58,881 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:03:58,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 74 [2022-01-19 09:03:58,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866315030] [2022-01-19 09:03:58,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:03:58,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-19 09:03:58,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:03:58,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-19 09:03:58,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=4911, Unknown=1, NotChecked=142, Total=5402 [2022-01-19 09:03:58,884 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 120 [2022-01-19 09:03:58,886 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 654 places, 2972 transitions, 89472 flow. Second operand has 74 states, 74 states have (on average 51.432432432432435) internal successors, (3806), 74 states have internal predecessors, (3806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:03:58,886 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:03:58,886 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 120 [2022-01-19 09:03:58,886 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:04:24,926 INFO L129 PetriNetUnfolder]: 4072/29300 cut-off events. [2022-01-19 09:04:24,926 INFO L130 PetriNetUnfolder]: For 1095946/1101053 co-relation queries the response was YES. [2022-01-19 09:04:25,413 INFO L84 FinitePrefix]: Finished finitePrefix Result has 189117 conditions, 29300 events. 4072/29300 cut-off events. For 1095946/1101053 co-relation queries the response was YES. Maximal size of possible extension queue 1261. Compared 461950 event pairs, 72 based on Foata normal form. 1462/28572 useless extension candidates. Maximal degree in co-relation 188910. Up to 4610 conditions per place. [2022-01-19 09:04:25,497 INFO L132 encePairwiseOnDemand]: 90/120 looper letters, 1749 selfloop transitions, 1735 changer transitions 120/3646 dead transitions. [2022-01-19 09:04:25,497 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 713 places, 3646 transitions, 116139 flow [2022-01-19 09:04:25,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-19 09:04:25,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-01-19 09:04:25,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3316 transitions. [2022-01-19 09:04:25,500 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43862433862433864 [2022-01-19 09:04:25,500 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3316 transitions. [2022-01-19 09:04:25,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3316 transitions. [2022-01-19 09:04:25,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:04:25,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3316 transitions. [2022-01-19 09:04:25,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 52.63492063492063) internal successors, (3316), 63 states have internal predecessors, (3316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:04:25,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 120.0) internal successors, (7680), 64 states have internal predecessors, (7680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:04:25,506 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 120.0) internal successors, (7680), 64 states have internal predecessors, (7680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:04:25,506 INFO L186 Difference]: Start difference. First operand has 654 places, 2972 transitions, 89472 flow. Second operand 63 states and 3316 transitions. [2022-01-19 09:04:25,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 713 places, 3646 transitions, 116139 flow [2022-01-19 09:04:38,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 671 places, 3646 transitions, 113416 flow, removed 368 selfloop flow, removed 42 redundant places. [2022-01-19 09:04:38,305 INFO L242 Difference]: Finished difference. Result has 697 places, 3431 transitions, 108120 flow [2022-01-19 09:04:38,308 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=87502, PETRI_DIFFERENCE_MINUEND_PLACES=609, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2972, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1315, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=108120, PETRI_PLACES=697, PETRI_TRANSITIONS=3431} [2022-01-19 09:04:38,309 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 590 predicate places. [2022-01-19 09:04:38,309 INFO L470 AbstractCegarLoop]: Abstraction has has 697 places, 3431 transitions, 108120 flow [2022-01-19 09:04:38,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 51.432432432432435) internal successors, (3806), 74 states have internal predecessors, (3806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:04:38,309 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:04:38,310 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:04:38,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-19 09:04:38,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-19 09:04:38,526 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:04:38,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:04:38,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1012773058, now seen corresponding path program 23 times [2022-01-19 09:04:38,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:04:38,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226401321] [2022-01-19 09:04:38,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:04:38,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:04:38,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:04:39,158 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:04:39,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:04:39,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226401321] [2022-01-19 09:04:39,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226401321] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:04:39,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580102282] [2022-01-19 09:04:39,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 09:04:39,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:04:39,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:04:39,160 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:04:39,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-19 09:04:39,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-19 09:04:39,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:04:39,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 55 conjunts are in the unsatisfiable core [2022-01-19 09:04:39,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:04:39,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-19 09:04:39,456 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 09:04:39,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 11 [2022-01-19 09:04:40,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-19 09:04:40,518 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-19 09:04:40,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 10 [2022-01-19 09:04:40,537 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:04:40,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:04:40,802 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 09:04:40,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2022-01-19 09:04:40,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 7 [2022-01-19 09:04:43,173 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:04:43,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580102282] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:04:43,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:04:43,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 73 [2022-01-19 09:04:43,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772066802] [2022-01-19 09:04:43,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:04:43,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-19 09:04:43,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:04:43,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-19 09:04:43,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=4901, Unknown=0, NotChecked=0, Total=5256 [2022-01-19 09:04:43,178 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 120 [2022-01-19 09:04:43,180 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 697 places, 3431 transitions, 108120 flow. Second operand has 73 states, 73 states have (on average 52.397260273972606) internal successors, (3825), 73 states have internal predecessors, (3825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:04:43,180 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:04:43,180 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 120 [2022-01-19 09:04:43,180 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:05:12,112 INFO L129 PetriNetUnfolder]: 4264/31238 cut-off events. [2022-01-19 09:05:12,113 INFO L130 PetriNetUnfolder]: For 1354312/1361155 co-relation queries the response was YES. [2022-01-19 09:05:12,685 INFO L84 FinitePrefix]: Finished finitePrefix Result has 215889 conditions, 31238 events. 4264/31238 cut-off events. For 1354312/1361155 co-relation queries the response was YES. Maximal size of possible extension queue 1247. Compared 493886 event pairs, 44 based on Foata normal form. 2231/31140 useless extension candidates. Maximal degree in co-relation 215662. Up to 5280 conditions per place. [2022-01-19 09:05:12,781 INFO L132 encePairwiseOnDemand]: 90/120 looper letters, 1498 selfloop transitions, 2410 changer transitions 32/3983 dead transitions. [2022-01-19 09:05:12,782 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 749 places, 3983 transitions, 131828 flow [2022-01-19 09:05:12,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-19 09:05:12,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-01-19 09:05:12,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3079 transitions. [2022-01-19 09:05:12,784 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.45014619883040935 [2022-01-19 09:05:12,784 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3079 transitions. [2022-01-19 09:05:12,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3079 transitions. [2022-01-19 09:05:12,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:05:12,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3079 transitions. [2022-01-19 09:05:12,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 54.01754385964912) internal successors, (3079), 57 states have internal predecessors, (3079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:05:12,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 120.0) internal successors, (6960), 58 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:05:12,790 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 120.0) internal successors, (6960), 58 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:05:12,790 INFO L186 Difference]: Start difference. First operand has 697 places, 3431 transitions, 108120 flow. Second operand 57 states and 3079 transitions. [2022-01-19 09:05:12,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 749 places, 3983 transitions, 131828 flow [2022-01-19 09:05:33,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 715 places, 3983 transitions, 128474 flow, removed 1625 selfloop flow, removed 34 redundant places. [2022-01-19 09:05:33,594 INFO L242 Difference]: Finished difference. Result has 735 places, 3831 transitions, 127005 flow [2022-01-19 09:05:33,596 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=105478, PETRI_DIFFERENCE_MINUEND_PLACES=659, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2048, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=127005, PETRI_PLACES=735, PETRI_TRANSITIONS=3831} [2022-01-19 09:05:33,597 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 628 predicate places. [2022-01-19 09:05:33,597 INFO L470 AbstractCegarLoop]: Abstraction has has 735 places, 3831 transitions, 127005 flow [2022-01-19 09:05:33,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 52.397260273972606) internal successors, (3825), 73 states have internal predecessors, (3825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:05:33,597 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:05:33,597 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:05:33,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-19 09:05:33,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:05:33,798 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:05:33,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:05:33,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1668824978, now seen corresponding path program 24 times [2022-01-19 09:05:33,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:05:33,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96465792] [2022-01-19 09:05:33,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:05:33,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:05:33,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:05:34,364 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:05:34,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:05:34,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96465792] [2022-01-19 09:05:34,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96465792] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:05:34,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924052200] [2022-01-19 09:05:34,365 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 09:05:34,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:05:34,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:05:34,366 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:05:34,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-19 09:05:34,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-19 09:05:34,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:05:34,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 58 conjunts are in the unsatisfiable core [2022-01-19 09:05:34,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:05:34,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-19 09:05:34,877 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 09:05:34,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 11 [2022-01-19 09:05:35,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-19 09:05:35,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 [2022-01-19 09:05:35,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-19 09:05:36,171 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-19 09:05:36,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 10 [2022-01-19 09:05:36,193 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-19 09:05:36,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:05:38,341 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 09:05:38,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 57 treesize of output 45 [2022-01-19 09:05:38,350 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 09:05:38,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 100 treesize of output 100 [2022-01-19 09:05:38,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 60 treesize of output 48 [2022-01-19 09:05:38,363 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 09:05:38,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 51 treesize of output 55 [2022-01-19 09:05:40,003 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-19 09:05:40,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924052200] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:05:40,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:05:40,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 76 [2022-01-19 09:05:40,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642043727] [2022-01-19 09:05:40,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:05:40,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-19 09:05:40,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:05:40,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-19 09:05:40,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=5229, Unknown=16, NotChecked=0, Total=5700 [2022-01-19 09:05:40,008 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 120 [2022-01-19 09:05:40,010 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 735 places, 3831 transitions, 127005 flow. Second operand has 76 states, 76 states have (on average 50.38157894736842) internal successors, (3829), 76 states have internal predecessors, (3829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:05:40,010 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:05:40,010 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 120 [2022-01-19 09:05:40,010 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:05:57,963 WARN L228 SmtUtils]: Spent 9.47s on a formula simplification. DAG size of input: 88 DAG size of output: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-19 09:06:35,078 INFO L129 PetriNetUnfolder]: 4312/32176 cut-off events. [2022-01-19 09:06:35,079 INFO L130 PetriNetUnfolder]: For 1326235/1333139 co-relation queries the response was YES. [2022-01-19 09:06:36,359 INFO L84 FinitePrefix]: Finished finitePrefix Result has 221500 conditions, 32176 events. 4312/32176 cut-off events. For 1326235/1333139 co-relation queries the response was YES. Maximal size of possible extension queue 1297. Compared 513310 event pairs, 52 based on Foata normal form. 1376/31144 useless extension candidates. Maximal degree in co-relation 221257. Up to 6408 conditions per place. [2022-01-19 09:06:36,461 INFO L132 encePairwiseOnDemand]: 89/120 looper letters, 3455 selfloop transitions, 611 changer transitions 159/4267 dead transitions. [2022-01-19 09:06:36,461 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 807 places, 4267 transitions, 147640 flow [2022-01-19 09:06:36,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-19 09:06:36,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-01-19 09:06:36,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 3835 transitions. [2022-01-19 09:06:36,465 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4261111111111111 [2022-01-19 09:06:36,465 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 3835 transitions. [2022-01-19 09:06:36,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 3835 transitions. [2022-01-19 09:06:36,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:06:36,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 3835 transitions. [2022-01-19 09:06:36,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 51.13333333333333) internal successors, (3835), 75 states have internal predecessors, (3835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:06:36,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 120.0) internal successors, (9120), 76 states have internal predecessors, (9120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:06:36,474 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 120.0) internal successors, (9120), 76 states have internal predecessors, (9120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:06:36,474 INFO L186 Difference]: Start difference. First operand has 735 places, 3831 transitions, 127005 flow. Second operand 75 states and 3835 transitions. [2022-01-19 09:06:36,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 807 places, 4267 transitions, 147640 flow [2022-01-19 09:06:56,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 773 places, 4267 transitions, 146141 flow, removed 676 selfloop flow, removed 34 redundant places. [2022-01-19 09:06:56,139 INFO L242 Difference]: Finished difference. Result has 796 places, 4018 transitions, 133730 flow [2022-01-19 09:06:56,142 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=125598, PETRI_DIFFERENCE_MINUEND_PLACES=699, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3831, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=410, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=133730, PETRI_PLACES=796, PETRI_TRANSITIONS=4018} [2022-01-19 09:06:56,142 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 689 predicate places. [2022-01-19 09:06:56,142 INFO L470 AbstractCegarLoop]: Abstraction has has 796 places, 4018 transitions, 133730 flow [2022-01-19 09:06:56,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 50.38157894736842) internal successors, (3829), 76 states have internal predecessors, (3829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:06:56,143 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:06:56,143 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:06:56,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-19 09:06:56,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-19 09:06:56,349 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:06:56,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:06:56,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1511908898, now seen corresponding path program 25 times [2022-01-19 09:06:56,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:06:56,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362463161] [2022-01-19 09:06:56,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:06:56,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:06:56,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:06:56,405 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-19 09:06:56,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:06:56,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362463161] [2022-01-19 09:06:56,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362463161] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:06:56,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593803824] [2022-01-19 09:06:56,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 09:06:56,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:06:56,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:06:56,406 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:06:56,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-19 09:06:56,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:06:56,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 09:06:56,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:06:57,159 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-19 09:06:57,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:06:57,872 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-19 09:06:57,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593803824] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:06:57,872 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:06:57,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 17, 17] total 35 [2022-01-19 09:06:57,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285229112] [2022-01-19 09:06:57,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:06:57,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-19 09:06:57,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:06:57,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-19 09:06:57,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=904, Unknown=0, NotChecked=0, Total=1190 [2022-01-19 09:06:57,875 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 120 [2022-01-19 09:06:57,877 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 796 places, 4018 transitions, 133730 flow. Second operand has 35 states, 35 states have (on average 90.71428571428571) internal successors, (3175), 35 states have internal predecessors, (3175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:06:57,877 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:06:57,877 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 120 [2022-01-19 09:06:57,877 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:07:12,971 INFO L129 PetriNetUnfolder]: 2773/19040 cut-off events. [2022-01-19 09:07:12,971 INFO L130 PetriNetUnfolder]: For 1095256/1099090 co-relation queries the response was YES. [2022-01-19 09:07:13,350 INFO L84 FinitePrefix]: Finished finitePrefix Result has 146859 conditions, 19040 events. 2773/19040 cut-off events. For 1095256/1099090 co-relation queries the response was YES. Maximal size of possible extension queue 1168. Compared 287525 event pairs, 32 based on Foata normal form. 1179/18745 useless extension candidates. Maximal degree in co-relation 146594. Up to 2651 conditions per place. [2022-01-19 09:07:13,413 INFO L132 encePairwiseOnDemand]: 105/120 looper letters, 552 selfloop transitions, 1067 changer transitions 444/2204 dead transitions. [2022-01-19 09:07:13,414 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 776 places, 2204 transitions, 74591 flow [2022-01-19 09:07:13,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-19 09:07:13,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-01-19 09:07:13,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3001 transitions. [2022-01-19 09:07:13,416 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7578282828282829 [2022-01-19 09:07:13,416 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3001 transitions. [2022-01-19 09:07:13,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3001 transitions. [2022-01-19 09:07:13,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:07:13,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3001 transitions. [2022-01-19 09:07:13,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 90.93939393939394) internal successors, (3001), 33 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:07:13,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 120.0) internal successors, (4080), 34 states have internal predecessors, (4080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:07:13,422 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 120.0) internal successors, (4080), 34 states have internal predecessors, (4080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:07:13,422 INFO L186 Difference]: Start difference. First operand has 796 places, 4018 transitions, 133730 flow. Second operand 33 states and 3001 transitions. [2022-01-19 09:07:13,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 776 places, 2204 transitions, 74591 flow [2022-01-19 09:07:27,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 642 places, 2204 transitions, 69782 flow, removed 1040 selfloop flow, removed 134 redundant places. [2022-01-19 09:07:27,051 INFO L242 Difference]: Finished difference. Result has 646 places, 1722 transitions, 57517 flow [2022-01-19 09:07:27,052 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=46934, PETRI_DIFFERENCE_MINUEND_PLACES=610, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=646, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=57517, PETRI_PLACES=646, PETRI_TRANSITIONS=1722} [2022-01-19 09:07:27,053 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 539 predicate places. [2022-01-19 09:07:27,053 INFO L470 AbstractCegarLoop]: Abstraction has has 646 places, 1722 transitions, 57517 flow [2022-01-19 09:07:27,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 90.71428571428571) internal successors, (3175), 35 states have internal predecessors, (3175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:07:27,054 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:07:27,054 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:07:27,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-19 09:07:27,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-19 09:07:27,267 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:07:27,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:07:27,268 INFO L85 PathProgramCache]: Analyzing trace with hash 111343825, now seen corresponding path program 26 times [2022-01-19 09:07:27,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:07:27,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989241719] [2022-01-19 09:07:27,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:07:27,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:07:27,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:07:28,331 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:07:28,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:07:28,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989241719] [2022-01-19 09:07:28,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989241719] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:07:28,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971293683] [2022-01-19 09:07:28,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 09:07:28,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:07:28,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:07:28,333 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:07:28,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-19 09:07:28,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 09:07:28,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:07:28,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 54 conjunts are in the unsatisfiable core [2022-01-19 09:07:28,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:07:29,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 09:07:29,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-01-19 09:07:29,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-19 09:07:29,779 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:07:29,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:07:29,898 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_854 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_854) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)))) is different from false [2022-01-19 09:07:29,982 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 09:07:29,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2022-01-19 09:07:29,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 7 [2022-01-19 09:07:31,681 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:07:31,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971293683] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:07:31,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:07:31,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 30] total 78 [2022-01-19 09:07:31,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083737237] [2022-01-19 09:07:31,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:07:31,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-19 09:07:31,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:07:31,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-19 09:07:31,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=5445, Unknown=1, NotChecked=150, Total=6006 [2022-01-19 09:07:31,686 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 120 [2022-01-19 09:07:31,688 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 646 places, 1722 transitions, 57517 flow. Second operand has 78 states, 78 states have (on average 51.38461538461539) internal successors, (4008), 78 states have internal predecessors, (4008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:07:31,688 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:07:31,688 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 120 [2022-01-19 09:07:31,688 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:07:35,228 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (forall ((v_ArrVal_854 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_854) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)))))) (and (let ((.cse0 (+ c_~back~0 1))) (or (and (= (+ (* c_~front~0 4) 4) (* c_~back~0 4)) (not (= c_~queue~0.base |c_ULTIMATE.start_main_~#t2~0#1.base|))) (not (<= 0 .cse0)) (not (< .cse0 c_~n~0)))) (or (not (< c_~back~0 c_~n~0)) .cse1 (not (<= 0 c_~back~0))) .cse1)) is different from false [2022-01-19 09:07:35,515 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_854 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_854) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)))))) (and (or (not (< c_~back~0 c_~n~0)) .cse0 (not (<= 0 c_~back~0))) .cse0)) is different from false [2022-01-19 09:07:36,562 WARN L838 $PredicateComparison]: unable to prove that (and (= 5 c_~x~0) (forall ((v_ArrVal_854 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_854) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4))))) is different from false [2022-01-19 09:07:45,247 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_854 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_854) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)))) (or (<= 2 c_~front~0) (<= |c_#StackHeapBarrier| |c_ULTIMATE.start_main_~#t2~0#1.base|) (< c_~front~0 0))) is different from false [2022-01-19 09:08:14,104 INFO L129 PetriNetUnfolder]: 8010/48217 cut-off events. [2022-01-19 09:08:14,104 INFO L130 PetriNetUnfolder]: For 2319072/2330185 co-relation queries the response was YES. [2022-01-19 09:08:16,026 INFO L84 FinitePrefix]: Finished finitePrefix Result has 365313 conditions, 48217 events. 8010/48217 cut-off events. For 2319072/2330185 co-relation queries the response was YES. Maximal size of possible extension queue 2701. Compared 815752 event pairs, 62 based on Foata normal form. 2447/47166 useless extension candidates. Maximal degree in co-relation 365112. Up to 7556 conditions per place. [2022-01-19 09:08:16,211 INFO L132 encePairwiseOnDemand]: 89/120 looper letters, 2333 selfloop transitions, 3471 changer transitions 256/6102 dead transitions. [2022-01-19 09:08:16,211 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 624 places, 6102 transitions, 215217 flow [2022-01-19 09:08:16,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-01-19 09:08:16,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2022-01-19 09:08:16,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 7564 transitions. [2022-01-19 09:08:16,216 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4438967136150235 [2022-01-19 09:08:16,216 INFO L72 ComplementDD]: Start complementDD. Operand 142 states and 7564 transitions. [2022-01-19 09:08:16,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 142 states and 7564 transitions. [2022-01-19 09:08:16,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:08:16,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 142 states and 7564 transitions. [2022-01-19 09:08:16,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 143 states, 142 states have (on average 53.267605633802816) internal successors, (7564), 142 states have internal predecessors, (7564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:08:16,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 143 states, 143 states have (on average 120.0) internal successors, (17160), 143 states have internal predecessors, (17160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:08:16,351 INFO L81 ComplementDD]: Finished complementDD. Result has 143 states, 143 states have (on average 120.0) internal successors, (17160), 143 states have internal predecessors, (17160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:08:16,351 INFO L186 Difference]: Start difference. First operand has 646 places, 1722 transitions, 57517 flow. Second operand 142 states and 7564 transitions. [2022-01-19 09:08:16,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 624 places, 6102 transitions, 215217 flow [2022-01-19 09:08:46,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 546 places, 6102 transitions, 199320 flow, removed 7581 selfloop flow, removed 78 redundant places. [2022-01-19 09:08:46,196 INFO L242 Difference]: Finished difference. Result has 650 places, 5171 transitions, 184850 flow [2022-01-19 09:08:46,198 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=54603, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=702, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=142, PETRI_FLOW=184850, PETRI_PLACES=650, PETRI_TRANSITIONS=5171} [2022-01-19 09:08:46,198 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 543 predicate places. [2022-01-19 09:08:46,198 INFO L470 AbstractCegarLoop]: Abstraction has has 650 places, 5171 transitions, 184850 flow [2022-01-19 09:08:46,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 51.38461538461539) internal successors, (4008), 78 states have internal predecessors, (4008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:08:46,199 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:08:46,199 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:08:46,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-19 09:08:46,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:08:46,408 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:08:46,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:08:46,408 INFO L85 PathProgramCache]: Analyzing trace with hash 432153937, now seen corresponding path program 27 times [2022-01-19 09:08:46,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:08:46,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141977521] [2022-01-19 09:08:46,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:08:46,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:08:46,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:08:47,364 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:08:47,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:08:47,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141977521] [2022-01-19 09:08:47,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141977521] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:08:47,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27855388] [2022-01-19 09:08:47,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 09:08:47,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:08:47,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:08:47,366 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:08:47,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-19 09:08:47,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-19 09:08:47,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:08:47,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-19 09:08:47,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:08:47,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-19 09:08:47,935 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 09:08:47,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 11 [2022-01-19 09:08:48,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-01-19 09:08:48,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-19 09:08:48,406 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-01-19 09:08:48,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:08:48,467 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_892 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_892) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)))) is different from false [2022-01-19 09:08:48,489 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 09:08:48,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2022-01-19 09:08:48,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 7 [2022-01-19 09:08:48,921 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 46 trivial. 7 not checked. [2022-01-19 09:08:48,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27855388] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:08:48,921 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:08:48,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 16, 16] total 42 [2022-01-19 09:08:48,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535837345] [2022-01-19 09:08:48,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:08:48,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-19 09:08:48,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:08:48,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-19 09:08:48,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1526, Unknown=1, NotChecked=78, Total=1722 [2022-01-19 09:08:48,923 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 120 [2022-01-19 09:08:48,924 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 650 places, 5171 transitions, 184850 flow. Second operand has 42 states, 42 states have (on average 53.214285714285715) internal successors, (2235), 42 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:08:48,924 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:08:48,924 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 120 [2022-01-19 09:08:48,924 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:09:50,987 INFO L129 PetriNetUnfolder]: 8396/50059 cut-off events. [2022-01-19 09:09:50,987 INFO L130 PetriNetUnfolder]: For 2220690/2228833 co-relation queries the response was YES. [2022-01-19 09:09:53,127 INFO L84 FinitePrefix]: Finished finitePrefix Result has 374225 conditions, 50059 events. 8396/50059 cut-off events. For 2220690/2228833 co-relation queries the response was YES. Maximal size of possible extension queue 2821. Compared 851967 event pairs, 61 based on Foata normal form. 1894/48325 useless extension candidates. Maximal degree in co-relation 373973. Up to 16264 conditions per place. [2022-01-19 09:09:53,316 INFO L132 encePairwiseOnDemand]: 95/120 looper letters, 4341 selfloop transitions, 1530 changer transitions 74/5988 dead transitions. [2022-01-19 09:09:53,317 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 667 places, 5988 transitions, 220577 flow [2022-01-19 09:09:53,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-19 09:09:53,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-01-19 09:09:53,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2587 transitions. [2022-01-19 09:09:53,318 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.44913194444444443 [2022-01-19 09:09:53,318 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2587 transitions. [2022-01-19 09:09:53,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2587 transitions. [2022-01-19 09:09:53,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:09:53,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2587 transitions. [2022-01-19 09:09:53,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 53.895833333333336) internal successors, (2587), 48 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:09:53,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 120.0) internal successors, (5880), 49 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:09:53,323 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 120.0) internal successors, (5880), 49 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:09:53,323 INFO L186 Difference]: Start difference. First operand has 650 places, 5171 transitions, 184850 flow. Second operand 48 states and 2587 transitions. [2022-01-19 09:09:53,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 667 places, 5988 transitions, 220577 flow [2022-01-19 09:10:29,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 611 places, 5988 transitions, 202691 flow, removed 8885 selfloop flow, removed 56 redundant places. [2022-01-19 09:10:29,783 INFO L242 Difference]: Finished difference. Result has 621 places, 5677 transitions, 190403 flow [2022-01-19 09:10:29,786 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=168321, PETRI_DIFFERENCE_MINUEND_PLACES=564, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1049, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3697, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=190403, PETRI_PLACES=621, PETRI_TRANSITIONS=5677} [2022-01-19 09:10:29,787 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 514 predicate places. [2022-01-19 09:10:29,787 INFO L470 AbstractCegarLoop]: Abstraction has has 621 places, 5677 transitions, 190403 flow [2022-01-19 09:10:29,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 53.214285714285715) internal successors, (2235), 42 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:10:29,787 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:10:29,787 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:10:29,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-01-19 09:10:29,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:10:29,991 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:10:29,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:10:29,991 INFO L85 PathProgramCache]: Analyzing trace with hash 966196101, now seen corresponding path program 28 times [2022-01-19 09:10:29,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:10:29,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233985393] [2022-01-19 09:10:29,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:10:29,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:10:30,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:10:30,708 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:10:30,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:10:30,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233985393] [2022-01-19 09:10:30,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233985393] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:10:30,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914437383] [2022-01-19 09:10:30,709 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 09:10:30,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:10:30,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:10:30,710 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:10:30,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-19 09:10:30,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 09:10:30,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:10:30,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 47 conjunts are in the unsatisfiable core [2022-01-19 09:10:30,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:10:31,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 09:10:31,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-01-19 09:10:32,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-19 09:10:32,235 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:10:32,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:10:32,586 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 09:10:32,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2022-01-19 09:10:32,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 7 [2022-01-19 09:10:34,220 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 1 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:10:34,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914437383] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:10:34,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:10:34,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 78 [2022-01-19 09:10:34,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546998367] [2022-01-19 09:10:34,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:10:34,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-19 09:10:34,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:10:34,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-19 09:10:34,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=606, Invalid=5381, Unknown=19, NotChecked=0, Total=6006 [2022-01-19 09:10:34,225 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 120 [2022-01-19 09:10:34,226 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 5677 transitions, 190403 flow. Second operand has 78 states, 78 states have (on average 55.34615384615385) internal successors, (4317), 78 states have internal predecessors, (4317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:10:34,226 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:10:34,226 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 120 [2022-01-19 09:10:34,226 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2022-01-19 09:11:38,887 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 09:11:38,898 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 [2022-01-19 09:11:39,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-19 09:11:39,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 [2022-01-19 09:11:41,047 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-01-19 09:11:41,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-19 09:11:41,047 WARN L594 AbstractCegarLoop]: Verification canceled: while executing Executor. [2022-01-19 09:11:41,048 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-19 09:11:41,048 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-19 09:11:41,051 INFO L732 BasicCegarLoop]: Path program histogram: [28, 1, 1, 1, 1] [2022-01-19 09:11:41,052 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-19 09:11:41,052 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-19 09:11:41,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.01 09:11:41 BasicIcfg [2022-01-19 09:11:41,054 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-19 09:11:41,055 INFO L158 Benchmark]: Toolchain (without parser) took 755406.73ms. Allocated memory was 375.4MB in the beginning and 14.0GB in the end (delta: 13.6GB). Free memory was 317.9MB in the beginning and 11.2GB in the end (delta: -10.9GB). Peak memory consumption was 3.2GB. Max. memory is 16.0GB. [2022-01-19 09:11:41,055 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 375.4MB. Free memory is still 334.2MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 09:11:41,055 INFO L158 Benchmark]: CACSL2BoogieTranslator took 213.28ms. Allocated memory was 375.4MB in the beginning and 465.6MB in the end (delta: 90.2MB). Free memory was 317.8MB in the beginning and 434.2MB in the end (delta: -116.3MB). Peak memory consumption was 8.6MB. Max. memory is 16.0GB. [2022-01-19 09:11:41,055 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.88ms. Allocated memory is still 465.6MB. Free memory was 434.2MB in the beginning and 432.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 09:11:41,055 INFO L158 Benchmark]: Boogie Preprocessor took 31.81ms. Allocated memory is still 465.6MB. Free memory was 432.1MB in the beginning and 431.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 09:11:41,056 INFO L158 Benchmark]: RCFGBuilder took 542.83ms. Allocated memory is still 465.6MB. Free memory was 431.1MB in the beginning and 411.1MB in the end (delta: 19.9MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2022-01-19 09:11:41,056 INFO L158 Benchmark]: TraceAbstraction took 754560.24ms. Allocated memory was 465.6MB in the beginning and 14.0GB in the end (delta: 13.5GB). Free memory was 410.1MB in the beginning and 11.2GB in the end (delta: -10.8GB). Peak memory consumption was 3.2GB. Max. memory is 16.0GB. [2022-01-19 09:11:41,057 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 375.4MB. Free memory is still 334.2MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 213.28ms. Allocated memory was 375.4MB in the beginning and 465.6MB in the end (delta: 90.2MB). Free memory was 317.8MB in the beginning and 434.2MB in the end (delta: -116.3MB). Peak memory consumption was 8.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 53.88ms. Allocated memory is still 465.6MB. Free memory was 434.2MB in the beginning and 432.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 31.81ms. Allocated memory is still 465.6MB. Free memory was 432.1MB in the beginning and 431.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 542.83ms. Allocated memory is still 465.6MB. Free memory was 431.1MB in the beginning and 411.1MB in the end (delta: 19.9MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 754560.24ms. Allocated memory was 465.6MB in the beginning and 14.0GB in the end (delta: 13.5GB). Free memory was 410.1MB in the beginning and 11.2GB in the end (delta: -10.8GB). Peak memory consumption was 3.2GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing Executor. - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 128 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 754.4s, OverallIterations: 32, TraceHistogramMax: 4, PathProgramHistogramMax: 28, EmptinessCheckTime: 0.0s, AutomataDifference: 663.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 21623 SdHoareTripleChecker+Valid, 20.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 21623 mSDsluCounter, 23543 SdHoareTripleChecker+Invalid, 17.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 14512 IncrementalHoareTripleChecker+Unchecked, 37680 mSDsCounter, 4045 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 41536 IncrementalHoareTripleChecker+Invalid, 60093 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4045 mSolverCounterUnsat, 1063 mSDtfsCounter, 41536 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 8891 GetRequests, 5909 SyntacticMatches, 76 SemanticMatches, 2906 ConstructedPredicates, 13 IntricatePredicates, 14 DeprecatedPredicates, 90610 ImplicationChecksByTransitivity, 140.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=190403occurred in iteration=31, InterpolantAutomatonStates: 1581, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 2.4s SatisfiabilityAnalysisTime, 80.6s InterpolantComputationTime, 7047 NumberOfCodeBlocks, 6955 NumberOfCodeBlocksAsserted, 101 NumberOfCheckSat, 10305 ConstructedInterpolants, 576 QuantifiedInterpolants, 133954 SizeOfPredicates, 645 NumberOfNonLiveVariables, 7858 ConjunctsInSsa, 1064 ConjunctsInUnsatCore, 88 InterpolantComputations, 4 PerfectInterpolantSequences, 571/3051 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