/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.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 02:38:11,641 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 02:38:11,643 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 02:38:11,676 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 02:38:11,677 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 02:38:11,677 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 02:38:11,679 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 02:38:11,680 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 02:38:11,682 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 02:38:11,682 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 02:38:11,702 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 02:38:11,704 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 02:38:11,705 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 02:38:11,708 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 02:38:11,709 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 02:38:11,709 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 02:38:11,710 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 02:38:11,710 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 02:38:11,711 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 02:38:11,713 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 02:38:11,714 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 02:38:11,716 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 02:38:11,717 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 02:38:11,718 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 02:38:11,720 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 02:38:11,720 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 02:38:11,720 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 02:38:11,721 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 02:38:11,721 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 02:38:11,722 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 02:38:11,722 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 02:38:11,723 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 02:38:11,723 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 02:38:11,724 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 02:38:11,725 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 02:38:11,725 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 02:38:11,725 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 02:38:11,725 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 02:38:11,726 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 02:38:11,726 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 02:38:11,727 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 02:38:11,732 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.epf [2022-01-19 02:38:11,760 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 02:38:11,760 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 02:38:11,760 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 02:38:11,760 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 02:38:11,761 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 02:38:11,761 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 02:38:11,761 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 02:38:11,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 02:38:11,761 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 02:38:11,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 02:38:11,761 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 02:38:11,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 02:38:11,762 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 02:38:11,762 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 02:38:11,762 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 02:38:11,762 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 02:38:11,762 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 02:38:11,762 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 02:38:11,762 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 02:38:11,762 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 02:38:11,762 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 02:38:11,762 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 02:38:11,763 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 02:38:11,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 02:38:11,763 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 02:38:11,763 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 02:38:11,763 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 02:38:11,763 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 02:38:11,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 02:38:11,763 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 02:38:11,763 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 02:38:11,763 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 02:38:11,948 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 02:38:11,969 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 02:38:11,971 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 02:38:11,972 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 02:38:11,972 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 02:38:11,973 INFO L432 ainManager$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 02:38:12,040 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f25169ab/0204244457814681abc3543fc5d4590e/FLAG3b5157181 [2022-01-19 02:38:12,393 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 02:38:12,394 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c [2022-01-19 02:38:12,403 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f25169ab/0204244457814681abc3543fc5d4590e/FLAG3b5157181 [2022-01-19 02:38:12,415 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f25169ab/0204244457814681abc3543fc5d4590e [2022-01-19 02:38:12,418 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 02:38:12,420 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 02:38:12,423 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 02:38:12,423 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 02:38:12,425 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 02:38:12,425 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 02:38:12" (1/1) ... [2022-01-19 02:38:12,427 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ab38cb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:38:12, skipping insertion in model container [2022-01-19 02:38:12,427 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 02:38:12" (1/1) ... [2022-01-19 02:38:12,432 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 02:38:12,453 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 02:38:12,673 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 02:38:12,679 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 02:38:12,684 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 02:38:12,699 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 02:38:12,701 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 02:38:12,713 INFO L208 MainTranslator]: Completed translation [2022-01-19 02:38:12,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:38:12 WrapperNode [2022-01-19 02:38:12,713 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 02:38:12,714 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 02:38:12,714 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 02:38:12,714 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 02:38:12,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:38:12" (1/1) ... [2022-01-19 02:38:12,726 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:38:12" (1/1) ... [2022-01-19 02:38:12,744 INFO L137 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 128 [2022-01-19 02:38:12,744 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 02:38:12,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 02:38:12,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 02:38:12,745 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 02:38:12,751 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:38:12" (1/1) ... [2022-01-19 02:38:12,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:38:12" (1/1) ... [2022-01-19 02:38:12,754 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:38:12" (1/1) ... [2022-01-19 02:38:12,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:38:12" (1/1) ... [2022-01-19 02:38:12,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:38:12" (1/1) ... [2022-01-19 02:38:12,763 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:38:12" (1/1) ... [2022-01-19 02:38:12,764 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:38:12" (1/1) ... [2022-01-19 02:38:12,766 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 02:38:12,767 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 02:38:12,767 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 02:38:12,767 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 02:38:12,768 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:38:12" (1/1) ... [2022-01-19 02:38:12,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 02:38:12,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:38:12,804 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 02:38:12,830 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 02:38:12,845 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 02:38:12,845 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-19 02:38:12,845 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-19 02:38:12,846 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-19 02:38:12,846 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-19 02:38:12,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 02:38:12,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 02:38:12,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 02:38:12,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-19 02:38:12,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-19 02:38:12,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-19 02:38:12,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 02:38:12,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 02:38:12,847 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 02:38:12,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 02:38:12,849 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 02:38:12,948 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 02:38:12,963 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 02:38:13,177 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 02:38:13,230 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 02:38:13,230 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-19 02:38:13,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 02:38:13 BoogieIcfgContainer [2022-01-19 02:38:13,232 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 02:38:13,233 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 02:38:13,233 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 02:38:13,236 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 02:38:13,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 02:38:12" (1/3) ... [2022-01-19 02:38:13,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7697c635 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 02:38:13, skipping insertion in model container [2022-01-19 02:38:13,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:38:12" (2/3) ... [2022-01-19 02:38:13,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7697c635 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 02:38:13, skipping insertion in model container [2022-01-19 02:38:13,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 02:38:13" (3/3) ... [2022-01-19 02:38:13,238 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-simple-queue.wvr.c [2022-01-19 02:38:13,242 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 02:38:13,242 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 02:38:13,242 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 02:38:13,269 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,269 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,270 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,270 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,270 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,270 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,271 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,271 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,271 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,271 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,271 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,271 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,272 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,272 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,272 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,272 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,272 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,273 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,273 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,273 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,274 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,274 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,274 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,274 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,275 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,275 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,275 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,275 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,275 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,275 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,276 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,276 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,276 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,276 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,276 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,276 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,277 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,277 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,277 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,277 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,280 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,280 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,280 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,280 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,281 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,281 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,281 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,282 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,282 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,282 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,282 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,282 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,282 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,282 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:38:13,285 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-19 02:38:13,323 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 02:38:13,329 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 02:38:13,329 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-19 02:38:13,339 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 118 places, 120 transitions, 256 flow [2022-01-19 02:38:13,378 INFO L129 PetriNetUnfolder]: 9/118 cut-off events. [2022-01-19 02:38:13,379 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 02:38:13,381 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 02:38:13,381 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 120 transitions, 256 flow [2022-01-19 02:38:13,386 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 109 transitions, 230 flow [2022-01-19 02:38:13,421 INFO L129 PetriNetUnfolder]: 9/108 cut-off events. [2022-01-19 02:38:13,421 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 02:38:13,421 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:38:13,422 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 02:38:13,422 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:38:13,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:38:13,427 INFO L85 PathProgramCache]: Analyzing trace with hash 236033483, now seen corresponding path program 1 times [2022-01-19 02:38:13,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:38:13,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089597778] [2022-01-19 02:38:13,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:38:13,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:38:13,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:38:13,634 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 02:38:13,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:38:13,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089597778] [2022-01-19 02:38:13,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089597778] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:38:13,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 02:38:13,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-19 02:38:13,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460051693] [2022-01-19 02:38:13,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:38:13,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-19 02:38:13,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:38:13,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-19 02:38:13,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-19 02:38:13,667 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 120 [2022-01-19 02:38:13,670 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 02:38:13,670 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:38:13,670 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 120 [2022-01-19 02:38:13,671 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:38:13,702 INFO L129 PetriNetUnfolder]: 5/105 cut-off events. [2022-01-19 02:38:13,702 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-01-19 02:38:13,703 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 02:38:13,704 INFO L132 encePairwiseOnDemand]: 114/120 looper letters, 6 selfloop transitions, 0 changer transitions 3/103 dead transitions. [2022-01-19 02:38:13,704 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 103 transitions, 230 flow [2022-01-19 02:38:13,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-19 02:38:13,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-01-19 02:38:13,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 226 transitions. [2022-01-19 02:38:13,717 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9416666666666667 [2022-01-19 02:38:13,718 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 226 transitions. [2022-01-19 02:38:13,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 226 transitions. [2022-01-19 02:38:13,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:38:13,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 226 transitions. [2022-01-19 02:38:13,727 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 02:38:13,731 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 02:38:13,731 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 02:38:13,733 INFO L186 Difference]: Start difference. First operand has 107 places, 109 transitions, 230 flow. Second operand 2 states and 226 transitions. [2022-01-19 02:38:13,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 103 transitions, 230 flow [2022-01-19 02:38:13,736 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 02:38:13,739 INFO L242 Difference]: Finished difference. Result has 104 places, 100 transitions, 204 flow [2022-01-19 02:38:13,741 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 02:38:13,744 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, -3 predicate places. [2022-01-19 02:38:13,744 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 100 transitions, 204 flow [2022-01-19 02:38:13,745 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 02:38:13,745 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:38:13,745 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 02:38:13,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 02:38:13,746 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:38:13,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:38:13,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1569320269, now seen corresponding path program 1 times [2022-01-19 02:38:13,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:38:13,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994762599] [2022-01-19 02:38:13,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:38:13,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:38:13,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:38:13,953 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 02:38:13,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:38:13,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994762599] [2022-01-19 02:38:13,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994762599] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:38:13,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 02:38:13,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 02:38:13,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311853517] [2022-01-19 02:38:13,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:38:13,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 02:38:13,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:38:13,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 02:38:13,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-19 02:38:13,957 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 120 [2022-01-19 02:38:13,958 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 02:38:13,958 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:38:13,958 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 120 [2022-01-19 02:38:13,959 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:38:14,024 INFO L129 PetriNetUnfolder]: 7/124 cut-off events. [2022-01-19 02:38:14,025 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-01-19 02:38:14,025 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 02:38:14,026 INFO L132 encePairwiseOnDemand]: 115/120 looper letters, 21 selfloop transitions, 2 changer transitions 4/107 dead transitions. [2022-01-19 02:38:14,026 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 107 transitions, 274 flow [2022-01-19 02:38:14,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-19 02:38:14,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-01-19 02:38:14,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 478 transitions. [2022-01-19 02:38:14,030 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7966666666666666 [2022-01-19 02:38:14,030 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 478 transitions. [2022-01-19 02:38:14,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 478 transitions. [2022-01-19 02:38:14,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:38:14,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 478 transitions. [2022-01-19 02:38:14,032 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 02:38:14,034 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 02:38:14,035 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 02:38:14,035 INFO L186 Difference]: Start difference. First operand has 104 places, 100 transitions, 204 flow. Second operand 5 states and 478 transitions. [2022-01-19 02:38:14,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 107 transitions, 274 flow [2022-01-19 02:38:14,036 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 02:38:14,038 INFO L242 Difference]: Finished difference. Result has 108 places, 101 transitions, 220 flow [2022-01-19 02:38:14,038 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 02:38:14,039 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 1 predicate places. [2022-01-19 02:38:14,039 INFO L470 AbstractCegarLoop]: Abstraction has has 108 places, 101 transitions, 220 flow [2022-01-19 02:38:14,039 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 02:38:14,039 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:38:14,040 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 02:38:14,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 02:38:14,040 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:38:14,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:38:14,041 INFO L85 PathProgramCache]: Analyzing trace with hash -140655275, now seen corresponding path program 1 times [2022-01-19 02:38:14,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:38:14,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816516011] [2022-01-19 02:38:14,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:38:14,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:38:14,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:38:14,154 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 02:38:14,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:38:14,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816516011] [2022-01-19 02:38:14,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816516011] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:38:14,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 02:38:14,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 02:38:14,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332706124] [2022-01-19 02:38:14,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:38:14,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 02:38:14,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:38:14,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 02:38:14,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 02:38:14,157 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 120 [2022-01-19 02:38:14,158 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 02:38:14,158 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:38:14,158 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 120 [2022-01-19 02:38:14,158 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:38:14,203 INFO L129 PetriNetUnfolder]: 8/142 cut-off events. [2022-01-19 02:38:14,204 INFO L130 PetriNetUnfolder]: For 13/14 co-relation queries the response was YES. [2022-01-19 02:38:14,204 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 02:38:14,205 INFO L132 encePairwiseOnDemand]: 117/120 looper letters, 11 selfloop transitions, 2 changer transitions 2/105 dead transitions. [2022-01-19 02:38:14,205 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 105 transitions, 261 flow [2022-01-19 02:38:14,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 02:38:14,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 02:38:14,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 324 transitions. [2022-01-19 02:38:14,210 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9 [2022-01-19 02:38:14,210 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 324 transitions. [2022-01-19 02:38:14,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 324 transitions. [2022-01-19 02:38:14,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:38:14,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 324 transitions. [2022-01-19 02:38:14,211 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 02:38:14,212 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 02:38:14,212 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 02:38:14,213 INFO L186 Difference]: Start difference. First operand has 108 places, 101 transitions, 220 flow. Second operand 3 states and 324 transitions. [2022-01-19 02:38:14,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 105 transitions, 261 flow [2022-01-19 02:38:14,214 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 02:38:14,216 INFO L242 Difference]: Finished difference. Result has 106 places, 102 transitions, 226 flow [2022-01-19 02:38:14,216 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 02:38:14,217 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, -1 predicate places. [2022-01-19 02:38:14,217 INFO L470 AbstractCegarLoop]: Abstraction has has 106 places, 102 transitions, 226 flow [2022-01-19 02:38:14,217 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 02:38:14,217 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:38:14,217 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 02:38:14,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-19 02:38:14,218 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:38:14,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:38:14,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1295712521, now seen corresponding path program 1 times [2022-01-19 02:38:14,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:38:14,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029733717] [2022-01-19 02:38:14,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:38:14,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:38:14,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:38:14,344 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 02:38:14,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:38:14,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029733717] [2022-01-19 02:38:14,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029733717] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:38:14,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 02:38:14,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 02:38:14,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525805812] [2022-01-19 02:38:14,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:38:14,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 02:38:14,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:38:14,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 02:38:14,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-19 02:38:14,352 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 120 [2022-01-19 02:38:14,353 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 02:38:14,353 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:38:14,353 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 120 [2022-01-19 02:38:14,353 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:38:14,457 INFO L129 PetriNetUnfolder]: 8/185 cut-off events. [2022-01-19 02:38:14,457 INFO L130 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2022-01-19 02:38:14,458 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 02:38:14,459 INFO L132 encePairwiseOnDemand]: 112/120 looper letters, 20 selfloop transitions, 6 changer transitions 5/111 dead transitions. [2022-01-19 02:38:14,459 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 111 transitions, 310 flow [2022-01-19 02:38:14,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-19 02:38:14,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-01-19 02:38:14,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 681 transitions. [2022-01-19 02:38:14,462 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8107142857142857 [2022-01-19 02:38:14,462 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 681 transitions. [2022-01-19 02:38:14,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 681 transitions. [2022-01-19 02:38:14,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:38:14,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 681 transitions. [2022-01-19 02:38:14,465 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 02:38:14,466 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 02:38:14,467 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 02:38:14,467 INFO L186 Difference]: Start difference. First operand has 106 places, 102 transitions, 226 flow. Second operand 7 states and 681 transitions. [2022-01-19 02:38:14,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 111 transitions, 310 flow [2022-01-19 02:38:14,470 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 02:38:14,474 INFO L242 Difference]: Finished difference. Result has 113 places, 103 transitions, 246 flow [2022-01-19 02:38:14,474 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 02:38:14,476 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 6 predicate places. [2022-01-19 02:38:14,476 INFO L470 AbstractCegarLoop]: Abstraction has has 113 places, 103 transitions, 246 flow [2022-01-19 02:38:14,476 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 02:38:14,477 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:38:14,477 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 02:38:14,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-19 02:38:14,477 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:38:14,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:38:14,478 INFO L85 PathProgramCache]: Analyzing trace with hash 544482272, now seen corresponding path program 1 times [2022-01-19 02:38:14,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:38:14,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570747526] [2022-01-19 02:38:14,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:38:14,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:38:14,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:38:15,036 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 02:38:15,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:38:15,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570747526] [2022-01-19 02:38:15,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570747526] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:38:15,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107034079] [2022-01-19 02:38:15,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:38:15,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:38:15,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:38:15,043 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 02:38:15,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-19 02:38:15,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:38:15,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-19 02:38:15,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:38:16,254 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 02:38:16,289 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 02:38:16,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:38:16,425 INFO L353 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-01-19 02:38:16,425 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 02:38:17,162 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 02:38:17,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107034079] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:38:17,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:38:17,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 13] total 37 [2022-01-19 02:38:17,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748226379] [2022-01-19 02:38:17,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:38:17,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-19 02:38:17,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:38:17,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-19 02:38:17,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1089, Unknown=0, NotChecked=0, Total=1332 [2022-01-19 02:38:17,168 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-01-19 02:38:17,171 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 02:38:17,171 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:38:17,171 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-01-19 02:38:17,171 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:38:18,515 INFO L129 PetriNetUnfolder]: 95/652 cut-off events. [2022-01-19 02:38:18,515 INFO L130 PetriNetUnfolder]: For 181/181 co-relation queries the response was YES. [2022-01-19 02:38:18,518 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 02:38:18,520 INFO L132 encePairwiseOnDemand]: 94/120 looper letters, 109 selfloop transitions, 45 changer transitions 25/227 dead transitions. [2022-01-19 02:38:18,520 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 227 transitions, 965 flow [2022-01-19 02:38:18,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-19 02:38:18,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-01-19 02:38:18,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2441 transitions. [2022-01-19 02:38:18,531 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5215811965811966 [2022-01-19 02:38:18,531 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2441 transitions. [2022-01-19 02:38:18,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2441 transitions. [2022-01-19 02:38:18,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:38:18,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2441 transitions. [2022-01-19 02:38:18,538 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 02:38:18,546 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 02:38:18,547 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 02:38:18,547 INFO L186 Difference]: Start difference. First operand has 113 places, 103 transitions, 246 flow. Second operand 39 states and 2441 transitions. [2022-01-19 02:38:18,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 227 transitions, 965 flow [2022-01-19 02:38:18,550 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 02:38:18,553 INFO L242 Difference]: Finished difference. Result has 164 places, 140 transitions, 561 flow [2022-01-19 02:38:18,553 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 02:38:18,556 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 57 predicate places. [2022-01-19 02:38:18,556 INFO L470 AbstractCegarLoop]: Abstraction has has 164 places, 140 transitions, 561 flow [2022-01-19 02:38:18,558 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 02:38:18,558 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:38:18,559 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 02:38:18,585 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 02:38:18,779 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 02:38:18,780 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:38:18,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:38:18,780 INFO L85 PathProgramCache]: Analyzing trace with hash -2005710638, now seen corresponding path program 2 times [2022-01-19 02:38:18,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:38:18,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646096455] [2022-01-19 02:38:18,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:38:18,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:38:18,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:38:19,237 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 02:38:19,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:38:19,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646096455] [2022-01-19 02:38:19,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646096455] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:38:19,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857985689] [2022-01-19 02:38:19,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 02:38:19,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:38:19,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:38:19,240 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 02:38:19,268 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 02:38:19,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 02:38:19,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:38:19,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-19 02:38:19,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:38:19,863 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 02:38:20,233 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 02:38:20,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 02:38:20,394 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 02:38:20,538 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 02:38:20,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:38:20,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:38:20,656 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 02:38:21,484 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:38:21,484 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 02:38:21,494 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:38:21,494 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 02:38:21,501 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 02:38:21,511 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:38:21,511 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 02:38:22,352 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 02:38:22,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857985689] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:38:22,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:38:22,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 54 [2022-01-19 02:38:22,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419224101] [2022-01-19 02:38:22,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:38:22,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-19 02:38:22,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:38:22,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-19 02:38:22,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=2522, Unknown=10, NotChecked=102, Total=2862 [2022-01-19 02:38:22,357 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 120 [2022-01-19 02:38:22,360 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 02:38:22,360 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:38:22,360 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 120 [2022-01-19 02:38:22,360 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:38:24,862 INFO L129 PetriNetUnfolder]: 202/1209 cut-off events. [2022-01-19 02:38:24,862 INFO L130 PetriNetUnfolder]: For 1305/1317 co-relation queries the response was YES. [2022-01-19 02:38:24,867 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 02:38:24,871 INFO L132 encePairwiseOnDemand]: 90/120 looper letters, 91 selfloop transitions, 96 changer transitions 15/247 dead transitions. [2022-01-19 02:38:24,871 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 247 transitions, 1510 flow [2022-01-19 02:38:24,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-19 02:38:24,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-01-19 02:38:24,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2138 transitions. [2022-01-19 02:38:24,881 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4568376068376068 [2022-01-19 02:38:24,881 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2138 transitions. [2022-01-19 02:38:24,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2138 transitions. [2022-01-19 02:38:24,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:38:24,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2138 transitions. [2022-01-19 02:38:24,888 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 02:38:24,894 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 02:38:24,895 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 02:38:24,896 INFO L186 Difference]: Start difference. First operand has 164 places, 140 transitions, 561 flow. Second operand 39 states and 2138 transitions. [2022-01-19 02:38:24,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 247 transitions, 1510 flow [2022-01-19 02:38:24,906 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 02:38:24,912 INFO L242 Difference]: Finished difference. Result has 186 places, 198 transitions, 1154 flow [2022-01-19 02:38:24,912 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 02:38:24,914 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 79 predicate places. [2022-01-19 02:38:24,914 INFO L470 AbstractCegarLoop]: Abstraction has has 186 places, 198 transitions, 1154 flow [2022-01-19 02:38:24,916 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 02:38:24,916 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:38:24,916 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 02:38:24,941 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 02:38:25,138 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 02:38:25,139 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:38:25,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:38:25,140 INFO L85 PathProgramCache]: Analyzing trace with hash -358168892, now seen corresponding path program 3 times [2022-01-19 02:38:25,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:38:25,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264634617] [2022-01-19 02:38:25,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:38:25,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:38:25,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:38:25,202 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 02:38:25,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:38:25,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264634617] [2022-01-19 02:38:25,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264634617] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:38:25,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31998422] [2022-01-19 02:38:25,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 02:38:25,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:38:25,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:38:25,204 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 02:38:25,206 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 02:38:25,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-19 02:38:25,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:38:25,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-19 02:38:25,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:38:25,731 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 02:38:25,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:38:26,334 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 02:38:26,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31998422] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:38:26,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:38:26,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 11] total 22 [2022-01-19 02:38:26,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556474515] [2022-01-19 02:38:26,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:38:26,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-19 02:38:26,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:38:26,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-19 02:38:26,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2022-01-19 02:38:26,341 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 120 [2022-01-19 02:38:26,343 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 02:38:26,343 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:38:26,343 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 120 [2022-01-19 02:38:26,343 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:38:26,839 INFO L129 PetriNetUnfolder]: 144/1257 cut-off events. [2022-01-19 02:38:26,839 INFO L130 PetriNetUnfolder]: For 2034/2078 co-relation queries the response was YES. [2022-01-19 02:38:26,844 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 02:38:26,847 INFO L132 encePairwiseOnDemand]: 105/120 looper letters, 58 selfloop transitions, 39 changer transitions 39/224 dead transitions. [2022-01-19 02:38:26,847 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 224 transitions, 1546 flow [2022-01-19 02:38:26,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-19 02:38:26,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-01-19 02:38:26,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1734 transitions. [2022-01-19 02:38:26,852 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7605263157894737 [2022-01-19 02:38:26,852 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1734 transitions. [2022-01-19 02:38:26,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1734 transitions. [2022-01-19 02:38:26,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:38:26,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1734 transitions. [2022-01-19 02:38:26,864 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 02:38:26,868 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 02:38:26,868 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 02:38:26,868 INFO L186 Difference]: Start difference. First operand has 186 places, 198 transitions, 1154 flow. Second operand 19 states and 1734 transitions. [2022-01-19 02:38:26,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 224 transitions, 1546 flow [2022-01-19 02:38:26,876 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 02:38:26,880 INFO L242 Difference]: Finished difference. Result has 177 places, 164 transitions, 938 flow [2022-01-19 02:38:26,880 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 02:38:26,880 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 70 predicate places. [2022-01-19 02:38:26,881 INFO L470 AbstractCegarLoop]: Abstraction has has 177 places, 164 transitions, 938 flow [2022-01-19 02:38:26,881 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 02:38:26,881 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:38:26,882 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 02:38:26,907 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 02:38:27,095 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 02:38:27,096 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:38:27,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:38:27,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1320290218, now seen corresponding path program 4 times [2022-01-19 02:38:27,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:38:27,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844505445] [2022-01-19 02:38:27,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:38:27,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:38:27,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:38:27,180 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 02:38:27,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:38:27,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844505445] [2022-01-19 02:38:27,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844505445] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:38:27,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961677189] [2022-01-19 02:38:27,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 02:38:27,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:38:27,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:38:27,182 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 02:38:27,184 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 02:38:27,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 02:38:27,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:38:27,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 02:38:27,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:38:27,499 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 02:38:27,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:38:27,784 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 02:38:27,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961677189] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:38:27,784 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:38:27,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 02:38:27,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672668820] [2022-01-19 02:38:27,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:38:27,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 02:38:27,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:38:27,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 02:38:27,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-01-19 02:38:27,787 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 120 [2022-01-19 02:38:27,788 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 02:38:27,788 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:38:27,788 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 120 [2022-01-19 02:38:27,788 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:38:28,030 INFO L129 PetriNetUnfolder]: 75/637 cut-off events. [2022-01-19 02:38:28,030 INFO L130 PetriNetUnfolder]: For 1270/1287 co-relation queries the response was YES. [2022-01-19 02:38:28,033 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 02:38:28,035 INFO L132 encePairwiseOnDemand]: 109/120 looper letters, 56 selfloop transitions, 11 changer transitions 8/156 dead transitions. [2022-01-19 02:38:28,035 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 156 transitions, 978 flow [2022-01-19 02:38:28,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-19 02:38:28,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-01-19 02:38:28,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1116 transitions. [2022-01-19 02:38:28,037 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.775 [2022-01-19 02:38:28,037 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1116 transitions. [2022-01-19 02:38:28,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1116 transitions. [2022-01-19 02:38:28,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:38:28,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1116 transitions. [2022-01-19 02:38:28,043 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 02:38:28,046 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 02:38:28,046 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 02:38:28,046 INFO L186 Difference]: Start difference. First operand has 177 places, 164 transitions, 938 flow. Second operand 12 states and 1116 transitions. [2022-01-19 02:38:28,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 156 transitions, 978 flow [2022-01-19 02:38:28,051 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 02:38:28,053 INFO L242 Difference]: Finished difference. Result has 161 places, 144 transitions, 749 flow [2022-01-19 02:38:28,053 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 02:38:28,055 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 54 predicate places. [2022-01-19 02:38:28,055 INFO L470 AbstractCegarLoop]: Abstraction has has 161 places, 144 transitions, 749 flow [2022-01-19 02:38:28,056 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 02:38:28,056 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:38:28,056 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 02:38:28,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-19 02:38:28,271 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 02:38:28,271 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:38:28,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:38:28,272 INFO L85 PathProgramCache]: Analyzing trace with hash -733108111, now seen corresponding path program 5 times [2022-01-19 02:38:28,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:38:28,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834884519] [2022-01-19 02:38:28,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:38:28,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:38:28,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:38:28,816 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 02:38:28,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:38:28,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834884519] [2022-01-19 02:38:28,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834884519] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:38:28,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553459073] [2022-01-19 02:38:28,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 02:38:28,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:38:28,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:38:28,820 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 02:38:28,822 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 02:38:28,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 02:38:28,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:38:28,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 45 conjunts are in the unsatisfiable core [2022-01-19 02:38:28,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:38:28,913 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 02:38:29,107 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 02:38:29,107 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 02:38:29,683 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 02:38:29,867 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 02:38:29,890 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 02:38:29,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:38:30,126 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:38:30,127 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 02:38:30,129 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 02:38:31,309 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 02:38:31,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553459073] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:38:31,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:38:31,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 58 [2022-01-19 02:38:31,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005950361] [2022-01-19 02:38:31,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:38:31,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-19 02:38:31,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:38:31,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-19 02:38:31,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=3026, Unknown=0, NotChecked=0, Total=3306 [2022-01-19 02:38:31,313 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 120 [2022-01-19 02:38:31,316 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 02:38:31,316 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:38:31,316 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 120 [2022-01-19 02:38:31,316 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:38:34,920 INFO L129 PetriNetUnfolder]: 277/1760 cut-off events. [2022-01-19 02:38:34,920 INFO L130 PetriNetUnfolder]: For 3555/3596 co-relation queries the response was YES. [2022-01-19 02:38:34,927 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 02:38:34,933 INFO L132 encePairwiseOnDemand]: 94/120 looper letters, 180 selfloop transitions, 97 changer transitions 37/356 dead transitions. [2022-01-19 02:38:34,934 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 356 transitions, 2797 flow [2022-01-19 02:38:34,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-19 02:38:34,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-01-19 02:38:34,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2720 transitions. [2022-01-19 02:38:34,938 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2022-01-19 02:38:34,938 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2720 transitions. [2022-01-19 02:38:34,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2720 transitions. [2022-01-19 02:38:34,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:38:34,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2720 transitions. [2022-01-19 02:38:34,943 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 02:38:34,950 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 02:38:34,951 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 02:38:34,951 INFO L186 Difference]: Start difference. First operand has 161 places, 144 transitions, 749 flow. Second operand 51 states and 2720 transitions. [2022-01-19 02:38:34,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 356 transitions, 2797 flow [2022-01-19 02:38:34,959 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 02:38:34,963 INFO L242 Difference]: Finished difference. Result has 210 places, 209 transitions, 1768 flow [2022-01-19 02:38:34,964 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 02:38:34,964 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 103 predicate places. [2022-01-19 02:38:34,964 INFO L470 AbstractCegarLoop]: Abstraction has has 210 places, 209 transitions, 1768 flow [2022-01-19 02:38:34,966 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 02:38:34,966 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:38:34,966 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 02:38:34,990 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 02:38:35,179 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 02:38:35,180 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:38:35,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:38:35,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1376987701, now seen corresponding path program 6 times [2022-01-19 02:38:35,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:38:35,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069843891] [2022-01-19 02:38:35,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:38:35,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:38:35,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:38:35,695 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 02:38:35,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:38:35,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069843891] [2022-01-19 02:38:35,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069843891] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:38:35,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949927299] [2022-01-19 02:38:35,695 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 02:38:35,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:38:35,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:38:35,697 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 02:38:35,698 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 02:38:35,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 02:38:35,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:38:35,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 53 conjunts are in the unsatisfiable core [2022-01-19 02:38:35,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:38:36,373 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 02:38:36,646 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 02:38:36,776 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 02:38:37,007 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 02:38:37,038 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 02:38:37,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:38:38,036 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:38:38,036 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 02:38:38,044 INFO L353 Elim1Store]: treesize reduction 11, result has 38.9 percent of original size [2022-01-19 02:38:38,044 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 02:38:38,052 INFO L353 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-01-19 02:38:38,052 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 02:38:38,058 INFO L353 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-01-19 02:38:38,058 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 02:38:38,855 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 02:38:38,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949927299] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:38:38,855 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:38:38,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 26, 23] total 61 [2022-01-19 02:38:38,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312786676] [2022-01-19 02:38:38,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:38:38,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-19 02:38:38,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:38:38,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-19 02:38:38,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=3186, Unknown=34, NotChecked=0, Total=3660 [2022-01-19 02:38:38,860 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 120 [2022-01-19 02:38:38,863 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 02:38:38,863 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:38:38,863 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 120 [2022-01-19 02:38:38,863 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:38:44,452 INFO L129 PetriNetUnfolder]: 649/3870 cut-off events. [2022-01-19 02:38:44,453 INFO L130 PetriNetUnfolder]: For 18057/18146 co-relation queries the response was YES. [2022-01-19 02:38:44,466 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 02:38:44,480 INFO L132 encePairwiseOnDemand]: 91/120 looper letters, 263 selfloop transitions, 209 changer transitions 82/599 dead transitions. [2022-01-19 02:38:44,480 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 599 transitions, 6377 flow [2022-01-19 02:38:44,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-19 02:38:44,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2022-01-19 02:38:44,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 4614 transitions. [2022-01-19 02:38:44,487 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.46325301204819275 [2022-01-19 02:38:44,487 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 4614 transitions. [2022-01-19 02:38:44,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 4614 transitions. [2022-01-19 02:38:44,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:38:44,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 4614 transitions. [2022-01-19 02:38:44,494 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 02:38:44,505 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 02:38:44,506 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 02:38:44,506 INFO L186 Difference]: Start difference. First operand has 210 places, 209 transitions, 1768 flow. Second operand 83 states and 4614 transitions. [2022-01-19 02:38:44,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 599 transitions, 6377 flow [2022-01-19 02:38:44,546 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 02:38:44,554 INFO L242 Difference]: Finished difference. Result has 303 places, 325 transitions, 3981 flow [2022-01-19 02:38:44,555 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 02:38:44,556 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 196 predicate places. [2022-01-19 02:38:44,556 INFO L470 AbstractCegarLoop]: Abstraction has has 303 places, 325 transitions, 3981 flow [2022-01-19 02:38:44,557 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 02:38:44,557 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:38:44,557 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 02:38:44,583 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 02:38:44,771 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 02:38:44,771 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:38:44,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:38:44,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1201112641, now seen corresponding path program 7 times [2022-01-19 02:38:44,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:38:44,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24152794] [2022-01-19 02:38:44,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:38:44,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:38:44,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:38:45,457 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 02:38:45,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:38:45,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24152794] [2022-01-19 02:38:45,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24152794] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:38:45,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300644273] [2022-01-19 02:38:45,458 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 02:38:45,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:38:45,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:38:45,459 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 02:38:45,487 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 02:38:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:38:45,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-19 02:38:45,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:38:46,242 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-19 02:38:46,242 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 02:38:46,269 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 02:38:46,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:38:46,337 INFO L353 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-01-19 02:38:46,337 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 02:38:47,284 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 02:38:47,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300644273] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:38:47,284 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:38:47,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 17] total 46 [2022-01-19 02:38:47,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289187958] [2022-01-19 02:38:47,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:38:47,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-19 02:38:47,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:38:47,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-19 02:38:47,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1775, Unknown=0, NotChecked=0, Total=2070 [2022-01-19 02:38:47,287 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-01-19 02:38:47,289 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 02:38:47,289 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:38:47,289 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-01-19 02:38:47,289 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:38:50,534 INFO L129 PetriNetUnfolder]: 344/2274 cut-off events. [2022-01-19 02:38:50,535 INFO L130 PetriNetUnfolder]: For 22510/22561 co-relation queries the response was YES. [2022-01-19 02:38:50,545 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 02:38:50,552 INFO L132 encePairwiseOnDemand]: 93/120 looper letters, 148 selfloop transitions, 103 changer transitions 74/373 dead transitions. [2022-01-19 02:38:50,552 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 373 transitions, 4638 flow [2022-01-19 02:38:50,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-19 02:38:50,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-01-19 02:38:50,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3354 transitions. [2022-01-19 02:38:50,561 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5175925925925926 [2022-01-19 02:38:50,562 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3354 transitions. [2022-01-19 02:38:50,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3354 transitions. [2022-01-19 02:38:50,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:38:50,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3354 transitions. [2022-01-19 02:38:50,566 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 02:38:50,572 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 02:38:50,573 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 02:38:50,573 INFO L186 Difference]: Start difference. First operand has 303 places, 325 transitions, 3981 flow. Second operand 54 states and 3354 transitions. [2022-01-19 02:38:50,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 373 transitions, 4638 flow [2022-01-19 02:38:50,655 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 02:38:50,662 INFO L242 Difference]: Finished difference. Result has 281 places, 231 transitions, 2400 flow [2022-01-19 02:38:50,662 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 02:38:50,663 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 174 predicate places. [2022-01-19 02:38:50,664 INFO L470 AbstractCegarLoop]: Abstraction has has 281 places, 231 transitions, 2400 flow [2022-01-19 02:38:50,665 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 02:38:50,665 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:38:50,665 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 02:38:50,687 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 02:38:50,879 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 02:38:50,879 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:38:50,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:38:50,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1612226681, now seen corresponding path program 8 times [2022-01-19 02:38:50,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:38:50,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809084080] [2022-01-19 02:38:50,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:38:50,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:38:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:38:51,438 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 02:38:51,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:38:51,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809084080] [2022-01-19 02:38:51,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809084080] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:38:51,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21885941] [2022-01-19 02:38:51,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 02:38:51,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:38:51,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:38:51,439 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 02:38:51,440 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 02:38:51,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 02:38:51,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:38:51,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-19 02:38:51,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:38:52,109 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 02:38:52,385 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 02:38:52,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 02:38:52,631 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 02:38:52,814 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-19 02:38:52,814 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 02:38:52,850 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 02:38:52,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:38:52,974 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 02:38:54,166 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:38:54,166 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 02:38:54,175 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:38:54,175 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 02:38:54,186 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:38:54,186 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 02:38:54,192 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 02:38:55,380 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 02:38:55,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21885941] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:38:55,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:38:55,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26, 26] total 66 [2022-01-19 02:38:55,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864049788] [2022-01-19 02:38:55,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:38:55,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-19 02:38:55,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:38:55,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-19 02:38:55,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=3882, Unknown=4, NotChecked=126, Total=4290 [2022-01-19 02:38:55,383 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 120 [2022-01-19 02:38:55,385 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 02:38:55,385 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:38:55,385 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 120 [2022-01-19 02:38:55,385 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:38:58,306 INFO L129 PetriNetUnfolder]: 333/2084 cut-off events. [2022-01-19 02:38:58,307 INFO L130 PetriNetUnfolder]: For 15546/15593 co-relation queries the response was YES. [2022-01-19 02:38:58,317 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 02:38:58,323 INFO L132 encePairwiseOnDemand]: 91/120 looper letters, 134 selfloop transitions, 111 changer transitions 18/305 dead transitions. [2022-01-19 02:38:58,323 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 305 transitions, 3567 flow [2022-01-19 02:38:58,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-19 02:38:58,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-01-19 02:38:58,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1783 transitions. [2022-01-19 02:38:58,326 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43700980392156863 [2022-01-19 02:38:58,326 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1783 transitions. [2022-01-19 02:38:58,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1783 transitions. [2022-01-19 02:38:58,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:38:58,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1783 transitions. [2022-01-19 02:38:58,329 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 02:38:58,332 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 02:38:58,333 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 02:38:58,333 INFO L186 Difference]: Start difference. First operand has 281 places, 231 transitions, 2400 flow. Second operand 34 states and 1783 transitions. [2022-01-19 02:38:58,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 305 transitions, 3567 flow [2022-01-19 02:38:58,384 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 02:38:58,389 INFO L242 Difference]: Finished difference. Result has 255 places, 238 transitions, 2511 flow [2022-01-19 02:38:58,389 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 02:38:58,389 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 148 predicate places. [2022-01-19 02:38:58,389 INFO L470 AbstractCegarLoop]: Abstraction has has 255 places, 238 transitions, 2511 flow [2022-01-19 02:38:58,390 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 02:38:58,390 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:38:58,391 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 02:38:58,417 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 02:38:58,613 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 02:38:58,614 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:38:58,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:38:58,614 INFO L85 PathProgramCache]: Analyzing trace with hash -245402275, now seen corresponding path program 9 times [2022-01-19 02:38:58,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:38:58,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567071273] [2022-01-19 02:38:58,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:38:58,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:38:58,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:38:59,071 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 02:38:59,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:38:59,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567071273] [2022-01-19 02:38:59,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567071273] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:38:59,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647151416] [2022-01-19 02:38:59,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 02:38:59,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:38:59,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:38:59,072 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 02:38:59,073 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 02:38:59,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 02:38:59,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:38:59,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 56 conjunts are in the unsatisfiable core [2022-01-19 02:38:59,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:38:59,277 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 02:38:59,523 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 02:38:59,523 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 02:38:59,765 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 02:39:00,022 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 02:39:00,255 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 02:39:00,527 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-19 02:39:00,528 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 02:39:00,546 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 02:39:00,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:39:02,044 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:39:02,044 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 02:39:02,051 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:39:02,051 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 02:39:02,060 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:39:02,060 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 02:39:02,065 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 02:39:03,693 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 02:39:03,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647151416] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:39:03,693 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:39:03,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26, 26] total 66 [2022-01-19 02:39:03,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356276095] [2022-01-19 02:39:03,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:39:03,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-19 02:39:03,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:39:03,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-19 02:39:03,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=3969, Unknown=20, NotChecked=0, Total=4290 [2022-01-19 02:39:03,696 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 120 [2022-01-19 02:39:03,698 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 02:39:03,698 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:39:03,698 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 120 [2022-01-19 02:39:03,698 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:39:09,660 INFO L129 PetriNetUnfolder]: 387/2434 cut-off events. [2022-01-19 02:39:09,660 INFO L130 PetriNetUnfolder]: For 15975/16031 co-relation queries the response was YES. [2022-01-19 02:39:09,671 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 02:39:09,679 INFO L132 encePairwiseOnDemand]: 89/120 looper letters, 171 selfloop transitions, 108 changer transitions 31/352 dead transitions. [2022-01-19 02:39:09,679 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 352 transitions, 4018 flow [2022-01-19 02:39:09,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-19 02:39:09,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-01-19 02:39:09,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2240 transitions. [2022-01-19 02:39:09,682 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2022-01-19 02:39:09,682 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2240 transitions. [2022-01-19 02:39:09,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2240 transitions. [2022-01-19 02:39:09,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:39:09,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2240 transitions. [2022-01-19 02:39:09,686 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 02:39:09,690 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 02:39:09,691 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 02:39:09,691 INFO L186 Difference]: Start difference. First operand has 255 places, 238 transitions, 2511 flow. Second operand 43 states and 2240 transitions. [2022-01-19 02:39:09,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 352 transitions, 4018 flow [2022-01-19 02:39:09,747 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 02:39:09,753 INFO L242 Difference]: Finished difference. Result has 280 places, 276 transitions, 3118 flow [2022-01-19 02:39:09,753 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 02:39:09,753 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 173 predicate places. [2022-01-19 02:39:09,753 INFO L470 AbstractCegarLoop]: Abstraction has has 280 places, 276 transitions, 3118 flow [2022-01-19 02:39:09,754 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 02:39:09,754 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:39:09,754 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 02:39:09,779 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 02:39:09,969 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 02:39:09,969 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:39:09,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:39:09,969 INFO L85 PathProgramCache]: Analyzing trace with hash 640635893, now seen corresponding path program 10 times [2022-01-19 02:39:09,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:39:09,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394532233] [2022-01-19 02:39:09,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:39:09,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:39:09,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:39:10,023 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 02:39:10,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:39:10,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394532233] [2022-01-19 02:39:10,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394532233] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:39:10,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114848972] [2022-01-19 02:39:10,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 02:39:10,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:39:10,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:39:10,026 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 02:39:10,040 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 02:39:10,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 02:39:10,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:39:10,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-19 02:39:10,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:39:10,629 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 02:39:10,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:39:11,214 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 02:39:11,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114848972] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:39:11,215 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:39:11,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 14, 14] total 28 [2022-01-19 02:39:11,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531212194] [2022-01-19 02:39:11,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:39:11,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-19 02:39:11,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:39:11,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-19 02:39:11,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2022-01-19 02:39:11,217 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 120 [2022-01-19 02:39:11,218 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 02:39:11,218 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:39:11,218 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 120 [2022-01-19 02:39:11,218 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:39:11,999 INFO L129 PetriNetUnfolder]: 416/3077 cut-off events. [2022-01-19 02:39:11,999 INFO L130 PetriNetUnfolder]: For 32319/32410 co-relation queries the response was YES. [2022-01-19 02:39:12,015 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 02:39:12,023 INFO L132 encePairwiseOnDemand]: 105/120 looper letters, 93 selfloop transitions, 119 changer transitions 58/351 dead transitions. [2022-01-19 02:39:12,023 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 351 transitions, 4994 flow [2022-01-19 02:39:12,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-19 02:39:12,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-01-19 02:39:12,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2188 transitions. [2022-01-19 02:39:12,026 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7597222222222222 [2022-01-19 02:39:12,026 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2188 transitions. [2022-01-19 02:39:12,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2188 transitions. [2022-01-19 02:39:12,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:39:12,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2188 transitions. [2022-01-19 02:39:12,029 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 02:39:12,032 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 02:39:12,032 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 02:39:12,032 INFO L186 Difference]: Start difference. First operand has 280 places, 276 transitions, 3118 flow. Second operand 24 states and 2188 transitions. [2022-01-19 02:39:12,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 351 transitions, 4994 flow [2022-01-19 02:39:12,126 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 02:39:12,131 INFO L242 Difference]: Finished difference. Result has 264 places, 278 transitions, 3972 flow [2022-01-19 02:39:12,131 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 02:39:12,132 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 157 predicate places. [2022-01-19 02:39:12,132 INFO L470 AbstractCegarLoop]: Abstraction has has 264 places, 278 transitions, 3972 flow [2022-01-19 02:39:12,132 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 02:39:12,132 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:39:12,132 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 02:39:12,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-01-19 02:39:12,333 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 02:39:12,333 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:39:12,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:39:12,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1741611630, now seen corresponding path program 11 times [2022-01-19 02:39:12,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:39:12,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448005333] [2022-01-19 02:39:12,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:39:12,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:39:12,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:39:13,276 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 02:39:13,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:39:13,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448005333] [2022-01-19 02:39:13,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448005333] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:39:13,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044611968] [2022-01-19 02:39:13,277 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 02:39:13,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:39:13,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:39:13,280 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 02:39:13,302 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 02:39:13,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-19 02:39:13,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:39:13,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-19 02:39:13,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:39:13,475 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 02:39:13,656 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 02:39:13,656 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 02:39:14,315 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 02:39:14,367 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 02:39:14,399 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 02:39:14,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:39:14,466 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 02:39:14,536 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:39:14,537 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 02:39:14,539 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 02:39:15,929 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 02:39:15,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044611968] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:39:15,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:39:15,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 65 [2022-01-19 02:39:15,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151477990] [2022-01-19 02:39:15,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:39:15,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-19 02:39:15,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:39:15,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-19 02:39:15,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=3711, Unknown=1, NotChecked=124, Total=4160 [2022-01-19 02:39:15,934 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 120 [2022-01-19 02:39:15,935 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 02:39:15,935 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:39:15,936 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 120 [2022-01-19 02:39:15,936 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:39:18,816 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 02:39:19,684 INFO L129 PetriNetUnfolder]: 797/4372 cut-off events. [2022-01-19 02:39:19,684 INFO L130 PetriNetUnfolder]: For 53902/54132 co-relation queries the response was YES. [2022-01-19 02:39:19,707 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 02:39:19,724 INFO L132 encePairwiseOnDemand]: 91/120 looper letters, 247 selfloop transitions, 190 changer transitions 30/509 dead transitions. [2022-01-19 02:39:19,724 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 509 transitions, 8648 flow [2022-01-19 02:39:19,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-19 02:39:19,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-01-19 02:39:19,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2545 transitions. [2022-01-19 02:39:19,727 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4418402777777778 [2022-01-19 02:39:19,727 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2545 transitions. [2022-01-19 02:39:19,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2545 transitions. [2022-01-19 02:39:19,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:39:19,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2545 transitions. [2022-01-19 02:39:19,731 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 02:39:19,736 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 02:39:19,736 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 02:39:19,736 INFO L186 Difference]: Start difference. First operand has 264 places, 278 transitions, 3972 flow. Second operand 48 states and 2545 transitions. [2022-01-19 02:39:19,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 509 transitions, 8648 flow [2022-01-19 02:39:19,929 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 02:39:19,938 INFO L242 Difference]: Finished difference. Result has 265 places, 439 transitions, 7126 flow [2022-01-19 02:39:19,938 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 02:39:19,939 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 158 predicate places. [2022-01-19 02:39:19,939 INFO L470 AbstractCegarLoop]: Abstraction has has 265 places, 439 transitions, 7126 flow [2022-01-19 02:39:19,939 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 02:39:19,939 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:39:19,939 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 02:39:19,965 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 02:39:20,155 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 02:39:20,155 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:39:20,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:39:20,156 INFO L85 PathProgramCache]: Analyzing trace with hash -749571258, now seen corresponding path program 12 times [2022-01-19 02:39:20,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:39:20,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100633545] [2022-01-19 02:39:20,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:39:20,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:39:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:39:20,902 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 02:39:20,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:39:20,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100633545] [2022-01-19 02:39:20,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100633545] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:39:20,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006619417] [2022-01-19 02:39:20,903 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 02:39:20,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:39:20,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:39:20,904 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 02:39:20,905 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 02:39:20,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-19 02:39:20,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:39:21,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-19 02:39:21,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:39:21,027 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 02:39:21,165 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 02:39:21,166 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 02:39:21,448 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 02:39:21,507 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 02:39:21,530 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 02:39:21,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:39:21,586 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 02:39:21,605 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:39:21,606 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 02:39:21,609 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 02:39:22,048 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 02:39:22,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006619417] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:39:22,049 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:39:22,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 14, 14] total 37 [2022-01-19 02:39:22,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901393101] [2022-01-19 02:39:22,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:39:22,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-19 02:39:22,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:39:22,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-19 02:39:22,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1161, Unknown=1, NotChecked=68, Total=1332 [2022-01-19 02:39:22,051 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 120 [2022-01-19 02:39:22,052 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 02:39:22,052 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:39:22,052 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 120 [2022-01-19 02:39:22,052 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:39:24,123 INFO L129 PetriNetUnfolder]: 854/4823 cut-off events. [2022-01-19 02:39:24,123 INFO L130 PetriNetUnfolder]: For 48951/49099 co-relation queries the response was YES. [2022-01-19 02:39:24,148 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 02:39:24,167 INFO L132 encePairwiseOnDemand]: 98/120 looper letters, 327 selfloop transitions, 148 changer transitions 14/531 dead transitions. [2022-01-19 02:39:24,167 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 531 transitions, 9275 flow [2022-01-19 02:39:24,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-19 02:39:24,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-01-19 02:39:24,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1788 transitions. [2022-01-19 02:39:24,169 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43823529411764706 [2022-01-19 02:39:24,169 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1788 transitions. [2022-01-19 02:39:24,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1788 transitions. [2022-01-19 02:39:24,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:39:24,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1788 transitions. [2022-01-19 02:39:24,172 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 02:39:24,175 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 02:39:24,176 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 02:39:24,176 INFO L186 Difference]: Start difference. First operand has 265 places, 439 transitions, 7126 flow. Second operand 34 states and 1788 transitions. [2022-01-19 02:39:24,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 531 transitions, 9275 flow [2022-01-19 02:39:24,368 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 02:39:24,378 INFO L242 Difference]: Finished difference. Result has 278 places, 453 transitions, 7680 flow [2022-01-19 02:39:24,379 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 02:39:24,379 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 171 predicate places. [2022-01-19 02:39:24,379 INFO L470 AbstractCegarLoop]: Abstraction has has 278 places, 453 transitions, 7680 flow [2022-01-19 02:39:24,380 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 02:39:24,380 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:39:24,380 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 02:39:24,403 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 02:39:24,595 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 02:39:24,595 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:39:24,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:39:24,596 INFO L85 PathProgramCache]: Analyzing trace with hash -654771000, now seen corresponding path program 13 times [2022-01-19 02:39:24,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:39:24,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453480169] [2022-01-19 02:39:24,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:39:24,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:39:24,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:39:25,437 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 02:39:25,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:39:25,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453480169] [2022-01-19 02:39:25,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453480169] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:39:25,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372496999] [2022-01-19 02:39:25,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 02:39:25,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:39:25,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:39:25,438 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 02:39:25,439 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 02:39:25,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:39:25,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 46 conjunts are in the unsatisfiable core [2022-01-19 02:39:25,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:39:26,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 02:39:26,407 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 02:39:26,557 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 02:39:26,577 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 02:39:26,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:39:26,701 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 02:39:26,712 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:39:26,713 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 02:39:26,716 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 02:39:28,075 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 02:39:28,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372496999] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:39:28,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:39:28,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 68 [2022-01-19 02:39:28,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071099316] [2022-01-19 02:39:28,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:39:28,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-19 02:39:28,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:39:28,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-19 02:39:28,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=4132, Unknown=1, NotChecked=130, Total=4556 [2022-01-19 02:39:28,080 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 120 [2022-01-19 02:39:28,082 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 02:39:28,082 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:39:28,082 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 120 [2022-01-19 02:39:28,082 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:39:34,134 INFO L129 PetriNetUnfolder]: 1796/9629 cut-off events. [2022-01-19 02:39:34,134 INFO L130 PetriNetUnfolder]: For 114344/114647 co-relation queries the response was YES. [2022-01-19 02:39:34,183 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 02:39:34,217 INFO L132 encePairwiseOnDemand]: 91/120 looper letters, 382 selfloop transitions, 520 changer transitions 79/1023 dead transitions. [2022-01-19 02:39:34,217 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 1023 transitions, 19829 flow [2022-01-19 02:39:34,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-19 02:39:34,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-01-19 02:39:34,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 3528 transitions. [2022-01-19 02:39:34,221 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2022-01-19 02:39:34,221 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 3528 transitions. [2022-01-19 02:39:34,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 3528 transitions. [2022-01-19 02:39:34,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:39:34,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 3528 transitions. [2022-01-19 02:39:34,226 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 02:39:34,232 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 02:39:34,232 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 02:39:34,233 INFO L186 Difference]: Start difference. First operand has 278 places, 453 transitions, 7680 flow. Second operand 66 states and 3528 transitions. [2022-01-19 02:39:34,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 1023 transitions, 19829 flow [2022-01-19 02:39:34,592 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 02:39:34,607 INFO L242 Difference]: Finished difference. Result has 327 places, 762 transitions, 15770 flow [2022-01-19 02:39:34,608 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 02:39:34,608 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 220 predicate places. [2022-01-19 02:39:34,608 INFO L470 AbstractCegarLoop]: Abstraction has has 327 places, 762 transitions, 15770 flow [2022-01-19 02:39:34,609 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 02:39:34,609 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:39:34,609 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 02:39:34,629 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 02:39:34,823 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 02:39:34,824 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:39:34,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:39:34,824 INFO L85 PathProgramCache]: Analyzing trace with hash 449479964, now seen corresponding path program 14 times [2022-01-19 02:39:34,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:39:34,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837579486] [2022-01-19 02:39:34,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:39:34,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:39:34,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:39:35,577 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 02:39:35,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:39:35,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837579486] [2022-01-19 02:39:35,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837579486] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:39:35,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860870784] [2022-01-19 02:39:35,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 02:39:35,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:39:35,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:39:35,579 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 02:39:35,581 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 02:39:35,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 02:39:35,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:39:35,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 44 conjunts are in the unsatisfiable core [2022-01-19 02:39:35,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:39:36,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 02:39:36,649 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 02:39:36,862 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 02:39:36,880 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 02:39:36,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:39:37,117 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:39:37,117 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 02:39:37,121 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 02:39:38,493 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 02:39:38,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860870784] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:39:38,494 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:39:38,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 71 [2022-01-19 02:39:38,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776937077] [2022-01-19 02:39:38,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:39:38,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-19 02:39:38,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:39:38,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-19 02:39:38,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=4538, Unknown=13, NotChecked=0, Total=4970 [2022-01-19 02:39:38,497 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 120 [2022-01-19 02:39:38,498 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 02:39:38,498 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:39:38,498 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 120 [2022-01-19 02:39:38,498 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:39:48,968 INFO L129 PetriNetUnfolder]: 2531/14511 cut-off events. [2022-01-19 02:39:48,968 INFO L130 PetriNetUnfolder]: For 240185/241123 co-relation queries the response was YES. [2022-01-19 02:39:49,163 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 02:39:49,201 INFO L132 encePairwiseOnDemand]: 91/120 looper letters, 496 selfloop transitions, 776 changer transitions 70/1384 dead transitions. [2022-01-19 02:39:49,201 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 1384 transitions, 29902 flow [2022-01-19 02:39:49,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-19 02:39:49,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2022-01-19 02:39:49,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 4790 transitions. [2022-01-19 02:39:49,208 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.45359848484848486 [2022-01-19 02:39:49,208 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 4790 transitions. [2022-01-19 02:39:49,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 4790 transitions. [2022-01-19 02:39:49,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:39:49,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 4790 transitions. [2022-01-19 02:39:49,215 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 02:39:49,222 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 02:39:49,223 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 02:39:49,223 INFO L186 Difference]: Start difference. First operand has 327 places, 762 transitions, 15770 flow. Second operand 88 states and 4790 transitions. [2022-01-19 02:39:49,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 1384 transitions, 29902 flow [2022-01-19 02:39:50,010 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 02:39:50,034 INFO L242 Difference]: Finished difference. Result has 394 places, 1056 transitions, 23626 flow [2022-01-19 02:39:50,034 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 02:39:50,034 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 287 predicate places. [2022-01-19 02:39:50,034 INFO L470 AbstractCegarLoop]: Abstraction has has 394 places, 1056 transitions, 23626 flow [2022-01-19 02:39:50,035 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 02:39:50,035 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:39:50,035 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 02:39:50,053 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 02:39:50,242 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 02:39:50,243 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:39:50,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:39:50,243 INFO L85 PathProgramCache]: Analyzing trace with hash -7573346, now seen corresponding path program 15 times [2022-01-19 02:39:50,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:39:50,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122353594] [2022-01-19 02:39:50,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:39:50,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:39:50,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:39:50,755 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 02:39:50,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:39:50,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122353594] [2022-01-19 02:39:50,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122353594] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:39:50,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149590690] [2022-01-19 02:39:50,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 02:39:50,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:39:50,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:39:50,756 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 02:39:50,757 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 02:39:50,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-19 02:39:50,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:39:50,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-19 02:39:50,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:39:51,371 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-19 02:39:51,371 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 02:39:51,399 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 02:39:51,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:39:51,628 INFO L353 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-01-19 02:39:51,628 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 02:39:51,973 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 02:39:51,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149590690] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:39:51,974 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:39:51,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 10, 11] total 37 [2022-01-19 02:39:51,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849885684] [2022-01-19 02:39:51,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:39:51,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-19 02:39:51,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:39:51,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-19 02:39:51,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1147, Unknown=0, NotChecked=0, Total=1332 [2022-01-19 02:39:51,976 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-01-19 02:39:51,977 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 02:39:51,977 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:39:51,977 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-01-19 02:39:51,977 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:39:59,843 INFO L129 PetriNetUnfolder]: 3341/19804 cut-off events. [2022-01-19 02:39:59,843 INFO L130 PetriNetUnfolder]: For 407503/408723 co-relation queries the response was YES. [2022-01-19 02:40:00,011 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 02:40:00,078 INFO L132 encePairwiseOnDemand]: 91/120 looper letters, 907 selfloop transitions, 641 changer transitions 47/1643 dead transitions. [2022-01-19 02:40:00,079 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 1643 transitions, 39248 flow [2022-01-19 02:40:00,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-19 02:40:00,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-01-19 02:40:00,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3708 transitions. [2022-01-19 02:40:00,083 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.523728813559322 [2022-01-19 02:40:00,083 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3708 transitions. [2022-01-19 02:40:00,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3708 transitions. [2022-01-19 02:40:00,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:40:00,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3708 transitions. [2022-01-19 02:40:00,088 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 02:40:00,093 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 02:40:00,093 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 02:40:00,093 INFO L186 Difference]: Start difference. First operand has 394 places, 1056 transitions, 23626 flow. Second operand 59 states and 3708 transitions. [2022-01-19 02:40:00,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 1643 transitions, 39248 flow [2022-01-19 02:40:02,699 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 02:40:02,728 INFO L242 Difference]: Finished difference. Result has 431 places, 1472 transitions, 33386 flow [2022-01-19 02:40:02,729 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 02:40:02,729 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 324 predicate places. [2022-01-19 02:40:02,729 INFO L470 AbstractCegarLoop]: Abstraction has has 431 places, 1472 transitions, 33386 flow [2022-01-19 02:40:02,730 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 02:40:02,730 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:40:02,730 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 02:40:02,753 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 02:40:02,947 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 02:40:02,948 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:40:02,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:40:02,948 INFO L85 PathProgramCache]: Analyzing trace with hash -932870588, now seen corresponding path program 16 times [2022-01-19 02:40:02,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:40:02,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380311353] [2022-01-19 02:40:02,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:40:02,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:40:02,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:40:03,504 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 02:40:03,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:40:03,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380311353] [2022-01-19 02:40:03,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380311353] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:40:03,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684143446] [2022-01-19 02:40:03,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 02:40:03,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:40:03,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:40:03,505 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 02:40:03,535 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 02:40:03,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 02:40:03,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:40:03,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-19 02:40:03,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:40:04,485 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-19 02:40:04,485 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 02:40:04,513 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 02:40:04,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:40:04,607 INFO L353 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-01-19 02:40:04,607 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 02:40:05,963 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 02:40:05,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684143446] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:40:05,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:40:05,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 21, 21] total 57 [2022-01-19 02:40:05,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754837600] [2022-01-19 02:40:05,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:40:05,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-19 02:40:05,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:40:05,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-19 02:40:05,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=2815, Unknown=0, NotChecked=0, Total=3192 [2022-01-19 02:40:05,968 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-01-19 02:40:05,970 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 02:40:05,970 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:40:05,970 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-01-19 02:40:05,970 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:40:23,346 INFO L129 PetriNetUnfolder]: 3460/23983 cut-off events. [2022-01-19 02:40:23,346 INFO L130 PetriNetUnfolder]: For 693151/694656 co-relation queries the response was YES. [2022-01-19 02:40:23,542 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 02:40:23,605 INFO L132 encePairwiseOnDemand]: 90/120 looper letters, 774 selfloop transitions, 1379 changer transitions 159/2360 dead transitions. [2022-01-19 02:40:23,605 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 2360 transitions, 59314 flow [2022-01-19 02:40:23,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-19 02:40:23,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2022-01-19 02:40:23,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 8028 transitions. [2022-01-19 02:40:23,612 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.52265625 [2022-01-19 02:40:23,612 INFO L72 ComplementDD]: Start complementDD. Operand 128 states and 8028 transitions. [2022-01-19 02:40:23,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 128 states and 8028 transitions. [2022-01-19 02:40:23,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:40:23,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 128 states and 8028 transitions. [2022-01-19 02:40:23,622 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 02:40:23,632 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 02:40:23,633 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 02:40:23,633 INFO L186 Difference]: Start difference. First operand has 431 places, 1472 transitions, 33386 flow. Second operand 128 states and 8028 transitions. [2022-01-19 02:40:23,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 2360 transitions, 59314 flow [2022-01-19 02:40:28,374 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 02:40:28,423 INFO L242 Difference]: Finished difference. Result has 576 places, 1886 transitions, 49385 flow [2022-01-19 02:40:28,424 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 02:40:28,424 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 469 predicate places. [2022-01-19 02:40:28,424 INFO L470 AbstractCegarLoop]: Abstraction has has 576 places, 1886 transitions, 49385 flow [2022-01-19 02:40:28,425 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 02:40:28,425 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:40:28,425 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 02:40:28,447 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 02:40:28,639 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 02:40:28,639 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:40:28,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:40:28,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1522031198, now seen corresponding path program 17 times [2022-01-19 02:40:28,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:40:28,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108075888] [2022-01-19 02:40:28,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:40:28,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:40:28,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:40:29,146 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 02:40:29,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:40:29,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108075888] [2022-01-19 02:40:29,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108075888] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:40:29,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132182732] [2022-01-19 02:40:29,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 02:40:29,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:40:29,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:40:29,148 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 02:40:29,149 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 02:40:29,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-19 02:40:29,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:40:29,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-19 02:40:29,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:40:29,693 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-19 02:40:29,694 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 02:40:29,714 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 02:40:29,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:40:29,802 INFO L353 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-01-19 02:40:29,802 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 25 treesize of output 17 [2022-01-19 02:40:30,063 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 02:40:30,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132182732] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:40:30,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:40:30,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 11, 10] total 33 [2022-01-19 02:40:30,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843514940] [2022-01-19 02:40:30,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:40:30,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-19 02:40:30,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:40:30,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-19 02:40:30,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=967, Unknown=0, NotChecked=0, Total=1056 [2022-01-19 02:40:30,066 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-01-19 02:40:30,067 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 02:40:30,067 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:40:30,067 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-01-19 02:40:30,067 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:40:45,775 INFO L129 PetriNetUnfolder]: 3601/25283 cut-off events. [2022-01-19 02:40:45,776 INFO L130 PetriNetUnfolder]: For 1182874/1185701 co-relation queries the response was YES. [2022-01-19 02:40:46,122 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 02:40:46,189 INFO L132 encePairwiseOnDemand]: 98/120 looper letters, 1366 selfloop transitions, 519 changer transitions 269/2202 dead transitions. [2022-01-19 02:40:46,190 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 595 places, 2202 transitions, 62174 flow [2022-01-19 02:40:46,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-19 02:40:46,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-01-19 02:40:46,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3479 transitions. [2022-01-19 02:40:46,192 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5271212121212121 [2022-01-19 02:40:46,192 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3479 transitions. [2022-01-19 02:40:46,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3479 transitions. [2022-01-19 02:40:46,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:40:46,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3479 transitions. [2022-01-19 02:40:46,195 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 02:40:46,199 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 02:40:46,200 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 02:40:46,200 INFO L186 Difference]: Start difference. First operand has 576 places, 1886 transitions, 49385 flow. Second operand 55 states and 3479 transitions. [2022-01-19 02:40:46,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 595 places, 2202 transitions, 62174 flow [2022-01-19 02:40:54,264 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 02:40:54,309 INFO L242 Difference]: Finished difference. Result has 535 places, 1784 transitions, 44447 flow [2022-01-19 02:40:54,311 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 02:40:54,311 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 428 predicate places. [2022-01-19 02:40:54,311 INFO L470 AbstractCegarLoop]: Abstraction has has 535 places, 1784 transitions, 44447 flow [2022-01-19 02:40:54,311 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 02:40:54,312 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:40:54,312 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 02:40:54,338 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 02:40:54,535 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 02:40:54,535 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:40:54,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:40:54,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1182897000, now seen corresponding path program 18 times [2022-01-19 02:40:54,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:40:54,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308395607] [2022-01-19 02:40:54,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:40:54,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:40:54,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:40:55,045 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 02:40:55,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:40:55,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308395607] [2022-01-19 02:40:55,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308395607] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:40:55,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718025838] [2022-01-19 02:40:55,046 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 02:40:55,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:40:55,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:40:55,047 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 02:40:55,048 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 02:40:55,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-19 02:40:55,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:40:55,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-19 02:40:55,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:40:56,088 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-19 02:40:56,088 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 02:40:56,107 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 02:40:56,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:40:56,360 INFO L353 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-01-19 02:40:56,360 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 02:40:57,272 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 02:40:57,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718025838] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:40:57,272 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:40:57,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20, 20] total 56 [2022-01-19 02:40:57,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433256191] [2022-01-19 02:40:57,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:40:57,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-19 02:40:57,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:40:57,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-19 02:40:57,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=2682, Unknown=0, NotChecked=0, Total=3080 [2022-01-19 02:40:57,275 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-01-19 02:40:57,276 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 02:40:57,276 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:40:57,276 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-01-19 02:40:57,276 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:41:11,128 INFO L129 PetriNetUnfolder]: 3648/25531 cut-off events. [2022-01-19 02:41:11,128 INFO L130 PetriNetUnfolder]: For 1068911/1071379 co-relation queries the response was YES. [2022-01-19 02:41:11,398 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 02:41:11,460 INFO L132 encePairwiseOnDemand]: 89/120 looper letters, 832 selfloop transitions, 1009 changer transitions 185/2074 dead transitions. [2022-01-19 02:41:11,460 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 2074 transitions, 55510 flow [2022-01-19 02:41:11,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-19 02:41:11,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-01-19 02:41:11,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3550 transitions. [2022-01-19 02:41:11,463 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5190058479532164 [2022-01-19 02:41:11,463 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3550 transitions. [2022-01-19 02:41:11,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3550 transitions. [2022-01-19 02:41:11,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:41:11,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3550 transitions. [2022-01-19 02:41:11,466 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 02:41:11,470 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 02:41:11,470 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 02:41:11,470 INFO L186 Difference]: Start difference. First operand has 535 places, 1784 transitions, 44447 flow. Second operand 57 states and 3550 transitions. [2022-01-19 02:41:11,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 2074 transitions, 55510 flow [2022-01-19 02:41:17,029 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 02:41:17,073 INFO L242 Difference]: Finished difference. Result has 531 places, 1798 transitions, 48325 flow [2022-01-19 02:41:17,075 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 02:41:17,075 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 424 predicate places. [2022-01-19 02:41:17,075 INFO L470 AbstractCegarLoop]: Abstraction has has 531 places, 1798 transitions, 48325 flow [2022-01-19 02:41:17,076 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 02:41:17,076 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:41:17,076 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 02:41:17,101 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 02:41:17,291 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 02:41:17,291 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:41:17,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:41:17,292 INFO L85 PathProgramCache]: Analyzing trace with hash -995908274, now seen corresponding path program 19 times [2022-01-19 02:41:17,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:41:17,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247434514] [2022-01-19 02:41:17,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:41:17,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:41:17,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:41:17,793 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 02:41:17,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:41:17,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247434514] [2022-01-19 02:41:17,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247434514] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:41:17,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027190230] [2022-01-19 02:41:17,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 02:41:17,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:41:17,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:41:17,795 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 02:41:17,796 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 02:41:17,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:41:17,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-19 02:41:17,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:41:18,881 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-19 02:41:18,882 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 02:41:18,904 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 02:41:18,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:41:19,028 INFO L353 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-01-19 02:41:19,028 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 02:41:19,898 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 02:41:19,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027190230] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:41:19,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:41:19,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 21, 21] total 57 [2022-01-19 02:41:19,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619896950] [2022-01-19 02:41:19,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:41:19,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-19 02:41:19,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:41:19,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-19 02:41:19,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=418, Invalid=2774, Unknown=0, NotChecked=0, Total=3192 [2022-01-19 02:41:19,902 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-01-19 02:41:19,904 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 02:41:19,904 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:41:19,904 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-01-19 02:41:19,904 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:41:37,414 INFO L129 PetriNetUnfolder]: 4025/27557 cut-off events. [2022-01-19 02:41:37,414 INFO L130 PetriNetUnfolder]: For 1137197/1139780 co-relation queries the response was YES. [2022-01-19 02:41:37,753 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 02:41:37,828 INFO L132 encePairwiseOnDemand]: 89/120 looper letters, 1046 selfloop transitions, 1586 changer transitions 429/3109 dead transitions. [2022-01-19 02:41:37,828 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 618 places, 3109 transitions, 90742 flow [2022-01-19 02:41:37,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-19 02:41:37,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2022-01-19 02:41:37,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 5964 transitions. [2022-01-19 02:41:37,833 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5177083333333333 [2022-01-19 02:41:37,833 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 5964 transitions. [2022-01-19 02:41:37,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 5964 transitions. [2022-01-19 02:41:37,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:41:37,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 5964 transitions. [2022-01-19 02:41:37,840 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 02:41:37,847 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 02:41:37,847 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 02:41:37,847 INFO L186 Difference]: Start difference. First operand has 531 places, 1798 transitions, 48325 flow. Second operand 96 states and 5964 transitions. [2022-01-19 02:41:37,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 618 places, 3109 transitions, 90742 flow [2022-01-19 02:41:46,272 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 02:41:46,336 INFO L242 Difference]: Finished difference. Result has 618 places, 2587 transitions, 75523 flow [2022-01-19 02:41:46,337 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 02:41:46,337 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 511 predicate places. [2022-01-19 02:41:46,338 INFO L470 AbstractCegarLoop]: Abstraction has has 618 places, 2587 transitions, 75523 flow [2022-01-19 02:41:46,338 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 02:41:46,338 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:41:46,338 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 02:41:46,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-01-19 02:41:46,561 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 02:41:46,561 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:41:46,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:41:46,562 INFO L85 PathProgramCache]: Analyzing trace with hash -760549072, now seen corresponding path program 20 times [2022-01-19 02:41:46,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:41:46,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335530194] [2022-01-19 02:41:46,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:41:46,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:41:46,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:41:47,015 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 02:41:47,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:41:47,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335530194] [2022-01-19 02:41:47,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335530194] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:41:47,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257839170] [2022-01-19 02:41:47,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 02:41:47,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:41:47,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:41:47,020 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 02:41:47,047 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 02:41:47,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 02:41:47,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:41:47,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-19 02:41:47,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:41:48,020 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-19 02:41:48,021 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 02:41:48,048 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 02:41:48,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:41:48,173 INFO L353 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-01-19 02:41:48,173 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 02:41:49,463 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 02:41:49,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257839170] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:41:49,467 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:41:49,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 21, 21] total 57 [2022-01-19 02:41:49,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346412291] [2022-01-19 02:41:49,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:41:49,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-19 02:41:49,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:41:49,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-19 02:41:49,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=2838, Unknown=0, NotChecked=0, Total=3192 [2022-01-19 02:41:49,471 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-01-19 02:41:49,473 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 02:41:49,473 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:41:49,473 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-01-19 02:41:49,474 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:42:13,177 INFO L129 PetriNetUnfolder]: 3903/27683 cut-off events. [2022-01-19 02:42:13,178 INFO L130 PetriNetUnfolder]: For 1279424/1284213 co-relation queries the response was YES. [2022-01-19 02:42:13,839 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 02:42:13,945 INFO L132 encePairwiseOnDemand]: 88/120 looper letters, 1303 selfloop transitions, 1709 changer transitions 142/3202 dead transitions. [2022-01-19 02:42:13,945 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 669 places, 3202 transitions, 99874 flow [2022-01-19 02:42:13,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-19 02:42:13,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-01-19 02:42:13,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 4290 transitions. [2022-01-19 02:42:13,949 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5181159420289855 [2022-01-19 02:42:13,949 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 4290 transitions. [2022-01-19 02:42:13,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 4290 transitions. [2022-01-19 02:42:13,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:42:13,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 4290 transitions. [2022-01-19 02:42:13,955 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 02:42:13,961 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 02:42:13,962 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 02:42:13,962 INFO L186 Difference]: Start difference. First operand has 618 places, 2587 transitions, 75523 flow. Second operand 69 states and 4290 transitions. [2022-01-19 02:42:13,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 669 places, 3202 transitions, 99874 flow [2022-01-19 02:42:27,174 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 02:42:27,243 INFO L242 Difference]: Finished difference. Result has 649 places, 2877 transitions, 85886 flow [2022-01-19 02:42:27,245 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 02:42:27,245 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 542 predicate places. [2022-01-19 02:42:27,245 INFO L470 AbstractCegarLoop]: Abstraction has has 649 places, 2877 transitions, 85886 flow [2022-01-19 02:42:27,246 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 02:42:27,246 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:42:27,246 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 02:42:27,265 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 02:42:27,455 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 02:42:27,455 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:42:27,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:42:27,456 INFO L85 PathProgramCache]: Analyzing trace with hash -2132022902, now seen corresponding path program 21 times [2022-01-19 02:42:27,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:42:27,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401246992] [2022-01-19 02:42:27,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:42:27,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:42:27,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:42:28,019 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 02:42:28,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:42:28,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401246992] [2022-01-19 02:42:28,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401246992] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:42:28,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253412135] [2022-01-19 02:42:28,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 02:42:28,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:42:28,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:42:28,021 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 02:42:28,023 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 02:42:28,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-19 02:42:28,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:42:28,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-19 02:42:28,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:42:28,784 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-19 02:42:28,784 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 02:42:28,803 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 02:42:28,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:42:28,931 INFO L353 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-01-19 02:42:28,932 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 02:42:29,181 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 02:42:29,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253412135] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:42:29,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:42:29,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 16, 11] total 39 [2022-01-19 02:42:29,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238087701] [2022-01-19 02:42:29,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:42:29,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-19 02:42:29,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:42:29,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-19 02:42:29,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2022-01-19 02:42:29,184 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-01-19 02:42:29,185 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 02:42:29,185 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:42:29,185 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-01-19 02:42:29,185 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:42:52,017 INFO L129 PetriNetUnfolder]: 4001/28304 cut-off events. [2022-01-19 02:42:52,018 INFO L130 PetriNetUnfolder]: For 1052203/1056760 co-relation queries the response was YES. [2022-01-19 02:42:52,642 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 02:42:52,733 INFO L132 encePairwiseOnDemand]: 97/120 looper letters, 2344 selfloop transitions, 768 changer transitions 92/3252 dead transitions. [2022-01-19 02:42:52,733 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 686 places, 3252 transitions, 102743 flow [2022-01-19 02:42:52,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-19 02:42:52,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-01-19 02:42:52,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3017 transitions. [2022-01-19 02:42:52,736 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5237847222222223 [2022-01-19 02:42:52,736 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3017 transitions. [2022-01-19 02:42:52,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3017 transitions. [2022-01-19 02:42:52,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:42:52,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3017 transitions. [2022-01-19 02:42:52,739 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 02:42:52,743 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 02:42:52,743 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 02:42:52,743 INFO L186 Difference]: Start difference. First operand has 649 places, 2877 transitions, 85886 flow. Second operand 48 states and 3017 transitions. [2022-01-19 02:42:52,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 686 places, 3252 transitions, 102743 flow [2022-01-19 02:43:04,268 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 02:43:04,342 INFO L242 Difference]: Finished difference. Result has 654 places, 2972 transitions, 89472 flow [2022-01-19 02:43:04,344 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 02:43:04,344 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 547 predicate places. [2022-01-19 02:43:04,344 INFO L470 AbstractCegarLoop]: Abstraction has has 654 places, 2972 transitions, 89472 flow [2022-01-19 02:43:04,345 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 02:43:04,345 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:43:04,345 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 02:43:04,361 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 02:43:04,545 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 02:43:04,546 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:43:04,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:43:04,546 INFO L85 PathProgramCache]: Analyzing trace with hash 909038002, now seen corresponding path program 22 times [2022-01-19 02:43:04,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:43:04,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278474731] [2022-01-19 02:43:04,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:43:04,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:43:04,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:43:05,161 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 02:43:05,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:43:05,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278474731] [2022-01-19 02:43:05,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278474731] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:43:05,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924988689] [2022-01-19 02:43:05,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 02:43:05,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:43:05,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:43:05,163 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 02:43:05,163 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 02:43:05,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 02:43:05,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:43:05,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 45 conjunts are in the unsatisfiable core [2022-01-19 02:43:05,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:43:06,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 02:43:06,249 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 02:43:06,517 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-19 02:43:06,518 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 02:43:06,537 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 02:43:06,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:43:06,685 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 02:43:06,703 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:43:06,704 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 02:43:06,706 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 02:43:08,782 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 02:43:08,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924988689] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:43:08,782 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:43:08,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 74 [2022-01-19 02:43:08,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073703690] [2022-01-19 02:43:08,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:43:08,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-19 02:43:08,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:43:08,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-19 02:43:08,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=4911, Unknown=1, NotChecked=142, Total=5402 [2022-01-19 02:43:08,786 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 120 [2022-01-19 02:43:08,788 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 02:43:08,788 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:43:08,788 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 120 [2022-01-19 02:43:08,788 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:43:37,138 INFO L129 PetriNetUnfolder]: 4072/29300 cut-off events. [2022-01-19 02:43:37,139 INFO L130 PetriNetUnfolder]: For 1095946/1101053 co-relation queries the response was YES. [2022-01-19 02:43:37,614 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 02:43:37,700 INFO L132 encePairwiseOnDemand]: 90/120 looper letters, 1749 selfloop transitions, 1735 changer transitions 120/3646 dead transitions. [2022-01-19 02:43:37,700 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 713 places, 3646 transitions, 116139 flow [2022-01-19 02:43:37,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-19 02:43:37,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-01-19 02:43:37,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3316 transitions. [2022-01-19 02:43:37,702 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43862433862433864 [2022-01-19 02:43:37,703 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3316 transitions. [2022-01-19 02:43:37,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3316 transitions. [2022-01-19 02:43:37,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:43:37,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3316 transitions. [2022-01-19 02:43:37,705 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 02:43:37,709 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 02:43:37,709 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 02:43:37,709 INFO L186 Difference]: Start difference. First operand has 654 places, 2972 transitions, 89472 flow. Second operand 63 states and 3316 transitions. [2022-01-19 02:43:37,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 713 places, 3646 transitions, 116139 flow [2022-01-19 02:43:49,621 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 02:43:49,698 INFO L242 Difference]: Finished difference. Result has 697 places, 3431 transitions, 108120 flow [2022-01-19 02:43:49,700 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 02:43:49,701 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 590 predicate places. [2022-01-19 02:43:49,701 INFO L470 AbstractCegarLoop]: Abstraction has has 697 places, 3431 transitions, 108120 flow [2022-01-19 02:43:49,701 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 02:43:49,701 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:43:49,702 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 02:43:49,721 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 02:43:49,915 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 02:43:49,915 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:43:49,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:43:49,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1012773058, now seen corresponding path program 23 times [2022-01-19 02:43:49,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:43:49,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288460375] [2022-01-19 02:43:49,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:43:49,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:43:49,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:43:50,485 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 02:43:50,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:43:50,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288460375] [2022-01-19 02:43:50,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288460375] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:43:50,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896762948] [2022-01-19 02:43:50,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 02:43:50,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:43:50,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:43:50,487 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 02:43:50,487 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 02:43:50,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-19 02:43:50,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:43:50,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 55 conjunts are in the unsatisfiable core [2022-01-19 02:43:50,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:43:50,604 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 02:43:50,773 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 02:43:50,773 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 02:43:51,559 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 02:43:51,857 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-19 02:43:51,857 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 02:43:51,875 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 02:43:51,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:43:52,138 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:43:52,138 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 02:43:52,141 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 02:43:54,488 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 02:43:54,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896762948] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:43:54,489 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:43:54,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 73 [2022-01-19 02:43:54,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741140757] [2022-01-19 02:43:54,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:43:54,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-19 02:43:54,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:43:54,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-19 02:43:54,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=4901, Unknown=0, NotChecked=0, Total=5256 [2022-01-19 02:43:54,492 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 120 [2022-01-19 02:43:54,494 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 02:43:54,494 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:43:54,494 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 120 [2022-01-19 02:43:54,494 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:44:25,980 INFO L129 PetriNetUnfolder]: 4264/31238 cut-off events. [2022-01-19 02:44:25,980 INFO L130 PetriNetUnfolder]: For 1354312/1361155 co-relation queries the response was YES. [2022-01-19 02:44:26,636 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 02:44:26,736 INFO L132 encePairwiseOnDemand]: 90/120 looper letters, 1498 selfloop transitions, 2410 changer transitions 32/3983 dead transitions. [2022-01-19 02:44:26,736 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 749 places, 3983 transitions, 131828 flow [2022-01-19 02:44:26,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-19 02:44:26,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-01-19 02:44:26,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3079 transitions. [2022-01-19 02:44:26,739 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.45014619883040935 [2022-01-19 02:44:26,740 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3079 transitions. [2022-01-19 02:44:26,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3079 transitions. [2022-01-19 02:44:26,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:44:26,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3079 transitions. [2022-01-19 02:44:26,743 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 02:44:26,747 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 02:44:26,747 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 02:44:26,747 INFO L186 Difference]: Start difference. First operand has 697 places, 3431 transitions, 108120 flow. Second operand 57 states and 3079 transitions. [2022-01-19 02:44:26,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 749 places, 3983 transitions, 131828 flow [2022-01-19 02:44:46,356 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 02:44:46,461 INFO L242 Difference]: Finished difference. Result has 735 places, 3831 transitions, 127005 flow [2022-01-19 02:44:46,463 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 02:44:46,464 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 628 predicate places. [2022-01-19 02:44:46,464 INFO L470 AbstractCegarLoop]: Abstraction has has 735 places, 3831 transitions, 127005 flow [2022-01-19 02:44:46,464 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 02:44:46,464 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:44:46,464 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 02:44:46,481 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 02:44:46,665 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 02:44:46,665 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:44:46,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:44:46,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1668824978, now seen corresponding path program 24 times [2022-01-19 02:44:46,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:44:46,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345335690] [2022-01-19 02:44:46,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:44:46,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:44:46,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:44:47,256 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 02:44:47,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:44:47,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345335690] [2022-01-19 02:44:47,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345335690] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:44:47,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266043577] [2022-01-19 02:44:47,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 02:44:47,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:44:47,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:44:47,258 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 02:44:47,258 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 02:44:47,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-19 02:44:47,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:44:47,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 58 conjunts are in the unsatisfiable core [2022-01-19 02:44:47,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:44:47,477 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 02:44:47,749 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 02:44:47,750 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 02:44:48,133 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 02:44:48,417 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 02:44:48,683 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 02:44:49,064 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-19 02:44:49,064 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 02:44:49,082 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 02:44:49,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:44:51,286 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:44:51,287 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 02:44:51,294 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:44:51,294 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 02:44:51,299 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 02:44:51,307 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:44:51,307 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 02:44:52,999 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 02:44:53,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266043577] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:44:53,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:44:53,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 76 [2022-01-19 02:44:53,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979355589] [2022-01-19 02:44:53,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:44:53,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-19 02:44:53,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:44:53,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-19 02:44:53,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=5230, Unknown=15, NotChecked=0, Total=5700 [2022-01-19 02:44:53,002 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 120 [2022-01-19 02:44:53,003 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 02:44:53,004 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:44:53,004 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 120 [2022-01-19 02:44:53,004 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:45:16,460 WARN L228 SmtUtils]: Spent 14.92s 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 02:45:56,496 INFO L129 PetriNetUnfolder]: 4312/32176 cut-off events. [2022-01-19 02:45:56,497 INFO L130 PetriNetUnfolder]: For 1326235/1333139 co-relation queries the response was YES. [2022-01-19 02:45:57,293 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 02:45:57,393 INFO L132 encePairwiseOnDemand]: 89/120 looper letters, 3455 selfloop transitions, 611 changer transitions 159/4267 dead transitions. [2022-01-19 02:45:57,393 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 807 places, 4267 transitions, 147640 flow [2022-01-19 02:45:57,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-19 02:45:57,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-01-19 02:45:57,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 3835 transitions. [2022-01-19 02:45:57,395 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4261111111111111 [2022-01-19 02:45:57,396 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 3835 transitions. [2022-01-19 02:45:57,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 3835 transitions. [2022-01-19 02:45:57,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:45:57,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 3835 transitions. [2022-01-19 02:45:57,398 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 02:45:57,402 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 02:45:57,402 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 02:45:57,402 INFO L186 Difference]: Start difference. First operand has 735 places, 3831 transitions, 127005 flow. Second operand 75 states and 3835 transitions. [2022-01-19 02:45:57,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 807 places, 4267 transitions, 147640 flow [2022-01-19 02:46:15,159 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 02:46:15,284 INFO L242 Difference]: Finished difference. Result has 796 places, 4018 transitions, 133730 flow [2022-01-19 02:46:15,287 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 02:46:15,288 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 689 predicate places. [2022-01-19 02:46:15,288 INFO L470 AbstractCegarLoop]: Abstraction has has 796 places, 4018 transitions, 133730 flow [2022-01-19 02:46:15,288 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 02:46:15,288 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:46:15,289 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 02:46:15,315 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 02:46:15,503 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 02:46:15,503 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:46:15,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:46:15,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1511908898, now seen corresponding path program 25 times [2022-01-19 02:46:15,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:46:15,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420751133] [2022-01-19 02:46:15,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:46:15,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:46:15,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:46:15,563 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 02:46:15,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:46:15,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420751133] [2022-01-19 02:46:15,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420751133] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:46:15,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910531253] [2022-01-19 02:46:15,564 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 02:46:15,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:46:15,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:46:15,565 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 02:46:15,566 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 02:46:15,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:46:15,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-19 02:46:15,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:46:16,271 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 02:46:16,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:46:17,002 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 02:46:17,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910531253] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:46:17,002 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:46:17,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 17, 17] total 35 [2022-01-19 02:46:17,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444177261] [2022-01-19 02:46:17,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:46:17,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-19 02:46:17,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:46:17,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-19 02:46:17,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=904, Unknown=0, NotChecked=0, Total=1190 [2022-01-19 02:46:17,005 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 120 [2022-01-19 02:46:17,006 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 02:46:17,006 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:46:17,006 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 120 [2022-01-19 02:46:17,006 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:46:32,381 INFO L129 PetriNetUnfolder]: 2773/19040 cut-off events. [2022-01-19 02:46:32,381 INFO L130 PetriNetUnfolder]: For 1095256/1099090 co-relation queries the response was YES. [2022-01-19 02:46:32,694 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 02:46:32,752 INFO L132 encePairwiseOnDemand]: 105/120 looper letters, 552 selfloop transitions, 1067 changer transitions 444/2204 dead transitions. [2022-01-19 02:46:32,752 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 776 places, 2204 transitions, 74591 flow [2022-01-19 02:46:32,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-19 02:46:32,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-01-19 02:46:32,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3001 transitions. [2022-01-19 02:46:32,754 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7578282828282829 [2022-01-19 02:46:32,754 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3001 transitions. [2022-01-19 02:46:32,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3001 transitions. [2022-01-19 02:46:32,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:46:32,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3001 transitions. [2022-01-19 02:46:32,757 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 02:46:32,760 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 02:46:32,760 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 02:46:32,760 INFO L186 Difference]: Start difference. First operand has 796 places, 4018 transitions, 133730 flow. Second operand 33 states and 3001 transitions. [2022-01-19 02:46:32,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 776 places, 2204 transitions, 74591 flow [2022-01-19 02:46:44,026 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 02:46:44,066 INFO L242 Difference]: Finished difference. Result has 646 places, 1722 transitions, 57517 flow [2022-01-19 02:46:44,067 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 02:46:44,068 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 539 predicate places. [2022-01-19 02:46:44,068 INFO L470 AbstractCegarLoop]: Abstraction has has 646 places, 1722 transitions, 57517 flow [2022-01-19 02:46:44,068 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 02:46:44,068 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:46:44,068 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 02:46:44,085 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 02:46:44,275 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 02:46:44,275 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:46:44,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:46:44,276 INFO L85 PathProgramCache]: Analyzing trace with hash 111343825, now seen corresponding path program 26 times [2022-01-19 02:46:44,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:46:44,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295817286] [2022-01-19 02:46:44,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:46:44,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:46:44,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:46:45,356 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 02:46:45,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:46:45,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295817286] [2022-01-19 02:46:45,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295817286] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:46:45,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400361462] [2022-01-19 02:46:45,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 02:46:45,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:46:45,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:46:45,358 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 02:46:45,359 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 02:46:45,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 02:46:45,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:46:45,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 54 conjunts are in the unsatisfiable core [2022-01-19 02:46:45,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:46:46,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 02:46:46,638 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 02:46:46,752 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 02:46:46,785 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 02:46:46,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:46:46,899 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 02:46:46,981 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:46:46,981 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 02:46:46,984 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 02:46:48,655 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 02:46:48,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400361462] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:46:48,655 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:46:48,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 30] total 78 [2022-01-19 02:46:48,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160548048] [2022-01-19 02:46:48,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:46:48,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-19 02:46:48,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:46:48,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-19 02:46:48,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=5445, Unknown=1, NotChecked=150, Total=6006 [2022-01-19 02:46:48,658 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 120 [2022-01-19 02:46:48,660 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 02:46:48,660 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:46:48,660 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 120 [2022-01-19 02:46:48,660 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:46:52,273 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 02:46:52,554 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 02:46:53,609 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 02:47:02,639 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 02:47:32,500 INFO L129 PetriNetUnfolder]: 8010/48217 cut-off events. [2022-01-19 02:47:32,500 INFO L130 PetriNetUnfolder]: For 2319072/2330185 co-relation queries the response was YES. [2022-01-19 02:47:33,951 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 02:47:34,268 INFO L132 encePairwiseOnDemand]: 89/120 looper letters, 2333 selfloop transitions, 3471 changer transitions 256/6102 dead transitions. [2022-01-19 02:47:34,268 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 624 places, 6102 transitions, 215217 flow [2022-01-19 02:47:34,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-01-19 02:47:34,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2022-01-19 02:47:34,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 7564 transitions. [2022-01-19 02:47:34,273 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4438967136150235 [2022-01-19 02:47:34,274 INFO L72 ComplementDD]: Start complementDD. Operand 142 states and 7564 transitions. [2022-01-19 02:47:34,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 142 states and 7564 transitions. [2022-01-19 02:47:34,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:47:34,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 142 states and 7564 transitions. [2022-01-19 02:47:34,280 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 02:47:34,287 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 02:47:34,288 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 02:47:34,288 INFO L186 Difference]: Start difference. First operand has 646 places, 1722 transitions, 57517 flow. Second operand 142 states and 7564 transitions. [2022-01-19 02:47:34,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 624 places, 6102 transitions, 215217 flow [2022-01-19 02:48:02,135 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 02:48:02,319 INFO L242 Difference]: Finished difference. Result has 650 places, 5171 transitions, 184850 flow [2022-01-19 02:48:02,320 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 02:48:02,320 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 543 predicate places. [2022-01-19 02:48:02,321 INFO L470 AbstractCegarLoop]: Abstraction has has 650 places, 5171 transitions, 184850 flow [2022-01-19 02:48:02,321 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 02:48:02,321 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:48:02,321 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 02:48:02,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-01-19 02:48:02,522 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 02:48:02,522 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:48:02,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:48:02,522 INFO L85 PathProgramCache]: Analyzing trace with hash 432153937, now seen corresponding path program 27 times [2022-01-19 02:48:02,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:48:02,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852298663] [2022-01-19 02:48:02,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:48:02,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:48:02,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:48:03,443 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 02:48:03,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:48:03,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852298663] [2022-01-19 02:48:03,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852298663] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:48:03,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840704441] [2022-01-19 02:48:03,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 02:48:03,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:48:03,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:48:03,445 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 02:48:03,448 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 02:48:03,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-19 02:48:03,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:48:03,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-19 02:48:03,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:48:03,817 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 02:48:03,916 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 02:48:03,917 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 02:48:04,269 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 02:48:04,363 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 02:48:04,381 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 02:48:04,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:48:04,432 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 02:48:04,454 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:48:04,454 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 02:48:04,457 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 02:48:04,892 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 02:48:04,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840704441] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:48:04,892 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:48:04,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 16, 16] total 42 [2022-01-19 02:48:04,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638499085] [2022-01-19 02:48:04,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:48:04,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-19 02:48:04,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:48:04,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-19 02:48:04,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1526, Unknown=1, NotChecked=78, Total=1722 [2022-01-19 02:48:04,894 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 120 [2022-01-19 02:48:04,895 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 02:48:04,895 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:48:04,895 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 120 [2022-01-19 02:48:04,895 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:49:19,940 INFO L129 PetriNetUnfolder]: 8396/50059 cut-off events. [2022-01-19 02:49:19,940 INFO L130 PetriNetUnfolder]: For 2220690/2228833 co-relation queries the response was YES. [2022-01-19 02:49:22,585 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 02:49:22,880 INFO L132 encePairwiseOnDemand]: 95/120 looper letters, 4341 selfloop transitions, 1530 changer transitions 74/5988 dead transitions. [2022-01-19 02:49:22,880 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 667 places, 5988 transitions, 220577 flow [2022-01-19 02:49:22,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-19 02:49:22,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-01-19 02:49:22,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2587 transitions. [2022-01-19 02:49:22,882 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.44913194444444443 [2022-01-19 02:49:22,882 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2587 transitions. [2022-01-19 02:49:22,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2587 transitions. [2022-01-19 02:49:22,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:49:22,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2587 transitions. [2022-01-19 02:49:22,884 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 02:49:22,886 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 02:49:22,886 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 02:49:22,887 INFO L186 Difference]: Start difference. First operand has 650 places, 5171 transitions, 184850 flow. Second operand 48 states and 2587 transitions. [2022-01-19 02:49:22,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 667 places, 5988 transitions, 220577 flow [2022-01-19 02:49:58,053 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 02:49:58,206 INFO L242 Difference]: Finished difference. Result has 621 places, 5677 transitions, 190403 flow [2022-01-19 02:49:58,209 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 02:49:58,209 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 514 predicate places. [2022-01-19 02:49:58,209 INFO L470 AbstractCegarLoop]: Abstraction has has 621 places, 5677 transitions, 190403 flow [2022-01-19 02:49:58,210 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 02:49:58,210 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:49:58,210 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 02:49:58,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-19 02:49:58,415 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 02:49:58,415 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:49:58,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:49:58,416 INFO L85 PathProgramCache]: Analyzing trace with hash 966196101, now seen corresponding path program 28 times [2022-01-19 02:49:58,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:49:58,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482976325] [2022-01-19 02:49:58,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:49:58,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:49:58,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:49:59,174 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 02:49:59,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:49:59,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482976325] [2022-01-19 02:49:59,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482976325] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:49:59,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282785488] [2022-01-19 02:49:59,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 02:49:59,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:49:59,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:49:59,175 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 02:49:59,177 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 02:49:59,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 02:49:59,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:49:59,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 47 conjunts are in the unsatisfiable core [2022-01-19 02:49:59,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:50:00,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 02:50:00,439 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 02:50:00,682 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 02:50:00,764 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 02:50:00,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:50:01,113 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 02:50:01,113 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 02:50:01,116 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 02:50:02,800 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 02:50:02,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282785488] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:50:02,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:50:02,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 78 [2022-01-19 02:50:02,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759734824] [2022-01-19 02:50:02,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:50:02,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-19 02:50:02,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:50:02,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-19 02:50:02,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=606, Invalid=5380, Unknown=20, NotChecked=0, Total=6006 [2022-01-19 02:50:02,804 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 120 [2022-01-19 02:50:02,805 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 02:50:02,805 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:50:02,805 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 120 [2022-01-19 02:50:02,805 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2022-01-19 02:50:44,136 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 02:50:44,136 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 02:50:44,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-19 02:50:44,723 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-01-19 02:50:44,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-01-19 02:50:44,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:50:44,924 WARN L594 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (78states, 53/120 universal loopers) in iteration 32,while PetriNetUnfolder was constructing finite prefix that currently has 186093 conditions, 27755 events (4571/27754 cut-off events. For 1045840/1051960 co-relation queries the response was YES. Maximal size of possible extension queue 3918. Compared 498734 event pairs, 13 based on Foata normal form. 2517/30674 useless extension candidates. Maximal degree in co-relation 185862. Up to 4154 conditions per place.). [2022-01-19 02:50:44,925 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-19 02:50:44,925 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-19 02:50:44,928 INFO L732 BasicCegarLoop]: Path program histogram: [28, 1, 1, 1, 1] [2022-01-19 02:50:44,930 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-19 02:50:44,930 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-19 02:50:44,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.01 02:50:44 BasicIcfg [2022-01-19 02:50:44,932 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-19 02:50:44,932 INFO L158 Benchmark]: Toolchain (without parser) took 752512.29ms. Allocated memory was 390.1MB in the beginning and 13.5GB in the end (delta: 13.1GB). Free memory was 335.4MB in the beginning and 9.2GB in the end (delta: -8.8GB). Peak memory consumption was 4.4GB. Max. memory is 16.0GB. [2022-01-19 02:50:44,932 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 390.1MB. Free memory is still 351.9MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 02:50:44,932 INFO L158 Benchmark]: CACSL2BoogieTranslator took 290.82ms. Allocated memory was 390.1MB in the beginning and 488.6MB in the end (delta: 98.6MB). Free memory was 335.3MB in the beginning and 460.6MB in the end (delta: -125.3MB). Peak memory consumption was 8.5MB. Max. memory is 16.0GB. [2022-01-19 02:50:44,933 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.24ms. Allocated memory is still 488.6MB. Free memory was 460.6MB in the beginning and 458.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 02:50:44,933 INFO L158 Benchmark]: Boogie Preprocessor took 21.71ms. Allocated memory is still 488.6MB. Free memory was 458.5MB in the beginning and 457.4MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 02:50:44,933 INFO L158 Benchmark]: RCFGBuilder took 464.89ms. Allocated memory is still 488.6MB. Free memory was 456.4MB in the beginning and 436.5MB in the end (delta: 19.9MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2022-01-19 02:50:44,933 INFO L158 Benchmark]: TraceAbstraction took 751698.51ms. Allocated memory was 488.6MB in the beginning and 13.5GB in the end (delta: 13.0GB). Free memory was 436.5MB in the beginning and 9.2GB in the end (delta: -8.7GB). Peak memory consumption was 4.4GB. Max. memory is 16.0GB. [2022-01-19 02:50:44,934 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 390.1MB. Free memory is still 351.9MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 290.82ms. Allocated memory was 390.1MB in the beginning and 488.6MB in the end (delta: 98.6MB). Free memory was 335.3MB in the beginning and 460.6MB in the end (delta: -125.3MB). Peak memory consumption was 8.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 30.24ms. Allocated memory is still 488.6MB. Free memory was 460.6MB in the beginning and 458.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 21.71ms. Allocated memory is still 488.6MB. Free memory was 458.5MB in the beginning and 457.4MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 464.89ms. Allocated memory is still 488.6MB. Free memory was 456.4MB in the beginning and 436.5MB in the end (delta: 19.9MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 751698.51ms. Allocated memory was 488.6MB in the beginning and 13.5GB in the end (delta: 13.0GB). Free memory was 436.5MB in the beginning and 9.2GB in the end (delta: -8.7GB). Peak memory consumption was 4.4GB. 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 CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (78states, 53/120 universal loopers) in iteration 32,while PetriNetUnfolder was constructing finite prefix that currently has 186093 conditions, 27755 events (4571/27754 cut-off events. For 1045840/1051960 co-relation queries the response was YES. Maximal size of possible extension queue 3918. Compared 498734 event pairs, 13 based on Foata normal form. 2517/30674 useless extension candidates. Maximal degree in co-relation 185862. Up to 4154 conditions per place.). - 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 CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (78states, 53/120 universal loopers) in iteration 32,while PetriNetUnfolder was constructing finite prefix that currently has 186093 conditions, 27755 events (4571/27754 cut-off events. For 1045840/1051960 co-relation queries the response was YES. Maximal size of possible extension queue 3918. Compared 498734 event pairs, 13 based on Foata normal form. 2517/30674 useless extension candidates. Maximal degree in co-relation 185862. Up to 4154 conditions per place.). - 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 CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (78states, 53/120 universal loopers) in iteration 32,while PetriNetUnfolder was constructing finite prefix that currently has 186093 conditions, 27755 events (4571/27754 cut-off events. For 1045840/1051960 co-relation queries the response was YES. Maximal size of possible extension queue 3918. Compared 498734 event pairs, 13 based on Foata normal form. 2517/30674 useless extension candidates. Maximal degree in co-relation 185862. Up to 4154 conditions per place.). - 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: 751.6s, OverallIterations: 32, TraceHistogramMax: 4, PathProgramHistogramMax: 28, EmptinessCheckTime: 0.0s, AutomataDifference: 660.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 21460 SdHoareTripleChecker+Valid, 19.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 21460 mSDsluCounter, 23311 SdHoareTripleChecker+Invalid, 16.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 14512 IncrementalHoareTripleChecker+Unchecked, 37449 mSDsCounter, 4033 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 41433 IncrementalHoareTripleChecker+Invalid, 59978 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4033 mSolverCounterUnsat, 1059 mSDtfsCounter, 41433 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 8886 GetRequests, 5909 SyntacticMatches, 76 SemanticMatches, 2901 ConstructedPredicates, 13 IntricatePredicates, 14 DeprecatedPredicates, 90196 ImplicationChecksByTransitivity, 143.8s 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, 2.5s SatisfiabilityAnalysisTime, 80.8s 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