/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/test-easy1.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 02:50:54,413 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 02:50:54,416 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 02:50:54,477 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 02:50:54,478 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 02:50:54,478 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 02:50:54,492 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 02:50:54,495 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 02:50:54,496 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 02:50:54,498 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 02:50:54,499 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 02:50:54,500 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 02:50:54,501 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 02:50:54,508 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 02:50:54,509 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 02:50:54,510 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 02:50:54,511 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 02:50:54,512 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 02:50:54,517 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 02:50:54,521 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 02:50:54,522 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 02:50:54,523 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 02:50:54,524 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 02:50:54,525 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 02:50:54,531 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 02:50:54,531 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 02:50:54,531 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 02:50:54,532 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 02:50:54,532 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 02:50:54,533 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 02:50:54,533 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 02:50:54,533 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 02:50:54,534 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 02:50:54,534 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 02:50:54,535 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 02:50:54,535 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 02:50:54,536 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 02:50:54,536 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 02:50:54,536 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 02:50:54,537 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 02:50:54,537 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 02:50:54,539 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 02:50:54,559 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 02:50:54,559 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 02:50:54,560 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 02:50:54,560 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 02:50:54,560 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 02:50:54,560 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 02:50:54,561 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 02:50:54,561 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 02:50:54,561 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 02:50:54,561 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 02:50:54,561 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 02:50:54,561 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 02:50:54,562 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 02:50:54,562 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 02:50:54,562 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 02:50:54,562 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 02:50:54,562 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 02:50:54,562 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 02:50:54,563 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 02:50:54,563 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 02:50:54,566 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 02:50:54,566 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 02:50:54,566 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 02:50:54,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 02:50:54,567 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 02:50:54,567 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 02:50:54,567 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 02:50:54,568 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 02:50:54,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 02:50:54,569 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 02:50:54,569 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 02:50:54,569 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 02:50:54,801 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 02:50:54,822 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 02:50:54,824 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 02:50:54,825 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 02:50:54,826 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 02:50:54,827 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-easy1.wvr.c [2022-01-19 02:50:54,879 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2232c7c4d/1354def072414538974d2035d778bd6b/FLAGf4741ba84 [2022-01-19 02:50:55,248 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 02:50:55,248 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy1.wvr.c [2022-01-19 02:50:55,255 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2232c7c4d/1354def072414538974d2035d778bd6b/FLAGf4741ba84 [2022-01-19 02:50:55,662 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2232c7c4d/1354def072414538974d2035d778bd6b [2022-01-19 02:50:55,663 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 02:50:55,664 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 02:50:55,669 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 02:50:55,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 02:50:55,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 02:50:55,672 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 02:50:55" (1/1) ... [2022-01-19 02:50:55,673 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79e28a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:50:55, skipping insertion in model container [2022-01-19 02:50:55,673 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 02:50:55" (1/1) ... [2022-01-19 02:50:55,678 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 02:50:55,689 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 02:50:55,852 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/test-easy1.wvr.c[1876,1889] [2022-01-19 02:50:55,854 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 02:50:55,860 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 02:50:55,882 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/test-easy1.wvr.c[1876,1889] [2022-01-19 02:50:55,888 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 02:50:55,899 INFO L208 MainTranslator]: Completed translation [2022-01-19 02:50:55,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:50:55 WrapperNode [2022-01-19 02:50:55,899 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 02:50:55,900 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 02:50:55,901 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 02:50:55,901 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 02:50:55,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:50:55" (1/1) ... [2022-01-19 02:50:55,914 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:50:55" (1/1) ... [2022-01-19 02:50:55,929 INFO L137 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 56 [2022-01-19 02:50:55,929 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 02:50:55,930 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 02:50:55,930 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 02:50:55,930 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 02:50:55,935 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:50:55" (1/1) ... [2022-01-19 02:50:55,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:50:55" (1/1) ... [2022-01-19 02:50:55,937 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:50:55" (1/1) ... [2022-01-19 02:50:55,937 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:50:55" (1/1) ... [2022-01-19 02:50:55,940 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:50:55" (1/1) ... [2022-01-19 02:50:55,943 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:50:55" (1/1) ... [2022-01-19 02:50:55,943 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:50:55" (1/1) ... [2022-01-19 02:50:55,946 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 02:50:55,947 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 02:50:55,947 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 02:50:55,947 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 02:50:55,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:50:55" (1/1) ... [2022-01-19 02:50:55,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 02:50:55,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:50:55,977 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 02:50:55,979 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 02:50:56,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 02:50:56,012 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-19 02:50:56,012 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-19 02:50:56,012 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-19 02:50:56,012 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-19 02:50:56,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 02:50:56,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 02:50:56,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 02:50:56,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 02:50:56,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 02:50:56,013 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 02:50:56,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 02:50:56,014 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 02:50:56,100 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 02:50:56,101 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 02:50:56,281 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 02:50:56,287 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 02:50:56,287 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-19 02:50:56,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 02:50:56 BoogieIcfgContainer [2022-01-19 02:50:56,288 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 02:50:56,289 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 02:50:56,289 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 02:50:56,303 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 02:50:56,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 02:50:55" (1/3) ... [2022-01-19 02:50:56,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4752e4ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 02:50:56, skipping insertion in model container [2022-01-19 02:50:56,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:50:55" (2/3) ... [2022-01-19 02:50:56,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4752e4ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 02:50:56, skipping insertion in model container [2022-01-19 02:50:56,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 02:50:56" (3/3) ... [2022-01-19 02:50:56,305 INFO L111 eAbstractionObserver]: Analyzing ICFG test-easy1.wvr.c [2022-01-19 02:50:56,309 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 02:50:56,309 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 02:50:56,309 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 02:50:56,367 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:56,367 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:56,367 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:56,368 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:56,368 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:56,368 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:56,368 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:56,368 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:56,369 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:56,369 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:56,370 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:56,370 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:56,370 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:56,370 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:56,370 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:56,371 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:56,371 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:56,371 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:56,371 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:56,372 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:56,374 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:56,374 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:56,374 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:56,376 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:56,376 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:56,376 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 02:50:56,385 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-19 02:50:56,435 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 02:50:56,441 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 02:50:56,442 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-19 02:50:56,455 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 184 flow [2022-01-19 02:50:56,504 INFO L129 PetriNetUnfolder]: 6/82 cut-off events. [2022-01-19 02:50:56,505 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 02:50:56,507 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 40 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2022-01-19 02:50:56,507 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 184 flow [2022-01-19 02:50:56,513 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 73 transitions, 158 flow [2022-01-19 02:50:56,535 INFO L129 PetriNetUnfolder]: 6/72 cut-off events. [2022-01-19 02:50:56,535 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 02:50:56,535 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:50:56,536 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] [2022-01-19 02:50:56,536 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:50:56,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:50:56,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1675015954, now seen corresponding path program 1 times [2022-01-19 02:50:56,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:50:56,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011341086] [2022-01-19 02:50:56,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:50:56,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:50:56,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:50:56,756 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 02:50:56,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:50:56,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011341086] [2022-01-19 02:50:56,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011341086] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:50:56,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 02:50:56,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-19 02:50:56,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069891309] [2022-01-19 02:50:56,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:50:56,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-19 02:50:56,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:50:56,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-19 02:50:56,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-19 02:50:56,808 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 84 [2022-01-19 02:50:56,811 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 158 flow. Second operand has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:50:56,812 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:50:56,812 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 84 [2022-01-19 02:50:56,813 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:50:56,850 INFO L129 PetriNetUnfolder]: 2/69 cut-off events. [2022-01-19 02:50:56,850 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-01-19 02:50:56,850 INFO L84 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 69 events. 2/69 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 35 event pairs, 0 based on Foata normal form. 6/71 useless extension candidates. Maximal degree in co-relation 48. Up to 5 conditions per place. [2022-01-19 02:50:56,852 INFO L132 encePairwiseOnDemand]: 80/84 looper letters, 4 selfloop transitions, 0 changer transitions 2/69 dead transitions. [2022-01-19 02:50:56,852 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 69 transitions, 158 flow [2022-01-19 02:50:56,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-19 02:50:56,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-01-19 02:50:56,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 158 transitions. [2022-01-19 02:50:56,861 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9404761904761905 [2022-01-19 02:50:56,862 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 158 transitions. [2022-01-19 02:50:56,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 158 transitions. [2022-01-19 02:50:56,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:50:56,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 158 transitions. [2022-01-19 02:50:56,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 79.0) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:50:56,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:50:56,874 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:50:56,876 INFO L186 Difference]: Start difference. First operand has 74 places, 73 transitions, 158 flow. Second operand 2 states and 158 transitions. [2022-01-19 02:50:56,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 69 transitions, 158 flow [2022-01-19 02:50:56,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 69 transitions, 150 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 02:50:56,886 INFO L242 Difference]: Finished difference. Result has 71 places, 67 transitions, 138 flow [2022-01-19 02:50:56,888 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=138, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2022-01-19 02:50:56,892 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, -3 predicate places. [2022-01-19 02:50:56,892 INFO L470 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 138 flow [2022-01-19 02:50:56,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:50:56,907 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:50:56,907 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] [2022-01-19 02:50:56,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 02:50:56,908 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:50:56,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:50:56,910 INFO L85 PathProgramCache]: Analyzing trace with hash 845260518, now seen corresponding path program 1 times [2022-01-19 02:50:56,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:50:56,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174459712] [2022-01-19 02:50:56,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:50:56,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:50:57,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:50:57,200 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 02:50:57,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:50:57,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174459712] [2022-01-19 02:50:57,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174459712] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:50:57,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 02:50:57,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-19 02:50:57,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85472478] [2022-01-19 02:50:57,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:50:57,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-19 02:50:57,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:50:57,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-19 02:50:57,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-19 02:50:57,206 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-01-19 02:50:57,207 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 138 flow. Second operand has 7 states, 7 states have (on average 55.57142857142857) internal successors, (389), 7 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:50:57,207 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:50:57,207 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-01-19 02:50:57,207 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:50:57,364 INFO L129 PetriNetUnfolder]: 62/212 cut-off events. [2022-01-19 02:50:57,364 INFO L130 PetriNetUnfolder]: For 11/23 co-relation queries the response was YES. [2022-01-19 02:50:57,365 INFO L84 FinitePrefix]: Finished finitePrefix Result has 355 conditions, 212 events. 62/212 cut-off events. For 11/23 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 736 event pairs, 30 based on Foata normal form. 2/178 useless extension candidates. Maximal degree in co-relation 352. Up to 85 conditions per place. [2022-01-19 02:50:57,367 INFO L132 encePairwiseOnDemand]: 76/84 looper letters, 29 selfloop transitions, 5 changer transitions 4/81 dead transitions. [2022-01-19 02:50:57,367 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 81 transitions, 245 flow [2022-01-19 02:50:57,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-19 02:50:57,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-01-19 02:50:57,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 410 transitions. [2022-01-19 02:50:57,370 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6972789115646258 [2022-01-19 02:50:57,370 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 410 transitions. [2022-01-19 02:50:57,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 410 transitions. [2022-01-19 02:50:57,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:50:57,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 410 transitions. [2022-01-19 02:50:57,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 58.57142857142857) internal successors, (410), 7 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:50:57,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:50:57,376 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:50:57,377 INFO L186 Difference]: Start difference. First operand has 71 places, 67 transitions, 138 flow. Second operand 7 states and 410 transitions. [2022-01-19 02:50:57,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 81 transitions, 245 flow [2022-01-19 02:50:57,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 81 transitions, 245 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 02:50:57,379 INFO L242 Difference]: Finished difference. Result has 78 places, 69 transitions, 165 flow [2022-01-19 02:50:57,379 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=165, PETRI_PLACES=78, PETRI_TRANSITIONS=69} [2022-01-19 02:50:57,380 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 4 predicate places. [2022-01-19 02:50:57,380 INFO L470 AbstractCegarLoop]: Abstraction has has 78 places, 69 transitions, 165 flow [2022-01-19 02:50:57,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 55.57142857142857) internal successors, (389), 7 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:50:57,381 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:50:57,381 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] [2022-01-19 02:50:57,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 02:50:57,381 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:50:57,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:50:57,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1873293087, now seen corresponding path program 1 times [2022-01-19 02:50:57,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:50:57,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797250008] [2022-01-19 02:50:57,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:50:57,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:50:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:50:57,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:50:57,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:50:57,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797250008] [2022-01-19 02:50:57,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797250008] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:50:57,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694320667] [2022-01-19 02:50:57,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:50:57,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:50:57,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:50:57,467 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 02:50:57,493 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 02:50:57,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:50:57,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-19 02:50:57,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:50:57,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:50:57,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:50:58,126 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 02:50:58,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694320667] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-19 02:50:58,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-19 02:50:58,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2022-01-19 02:50:58,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806284381] [2022-01-19 02:50:58,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:50:58,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 02:50:58,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:50:58,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 02:50:58,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-01-19 02:50:58,130 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-01-19 02:50:58,130 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 69 transitions, 165 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:50:58,131 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:50:58,131 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-01-19 02:50:58,131 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:50:58,253 INFO L129 PetriNetUnfolder]: 62/253 cut-off events. [2022-01-19 02:50:58,253 INFO L130 PetriNetUnfolder]: For 25/32 co-relation queries the response was YES. [2022-01-19 02:50:58,254 INFO L84 FinitePrefix]: Finished finitePrefix Result has 466 conditions, 253 events. 62/253 cut-off events. For 25/32 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 977 event pairs, 22 based on Foata normal form. 1/219 useless extension candidates. Maximal degree in co-relation 459. Up to 89 conditions per place. [2022-01-19 02:50:58,256 INFO L132 encePairwiseOnDemand]: 74/84 looper letters, 37 selfloop transitions, 11 changer transitions 0/91 dead transitions. [2022-01-19 02:50:58,256 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 91 transitions, 324 flow [2022-01-19 02:50:58,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 02:50:58,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 02:50:58,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 365 transitions. [2022-01-19 02:50:58,259 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7242063492063492 [2022-01-19 02:50:58,259 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 365 transitions. [2022-01-19 02:50:58,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 365 transitions. [2022-01-19 02:50:58,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:50:58,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 365 transitions. [2022-01-19 02:50:58,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 60.833333333333336) internal successors, (365), 6 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:50:58,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:50:58,263 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:50:58,263 INFO L186 Difference]: Start difference. First operand has 78 places, 69 transitions, 165 flow. Second operand 6 states and 365 transitions. [2022-01-19 02:50:58,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 91 transitions, 324 flow [2022-01-19 02:50:58,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 91 transitions, 305 flow, removed 6 selfloop flow, removed 5 redundant places. [2022-01-19 02:50:58,267 INFO L242 Difference]: Finished difference. Result has 79 places, 73 transitions, 210 flow [2022-01-19 02:50:58,267 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=79, PETRI_TRANSITIONS=73} [2022-01-19 02:50:58,269 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 5 predicate places. [2022-01-19 02:50:58,269 INFO L470 AbstractCegarLoop]: Abstraction has has 79 places, 73 transitions, 210 flow [2022-01-19 02:50:58,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:50:58,270 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:50:58,270 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] [2022-01-19 02:50:58,299 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 02:50:58,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:50:58,484 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:50:58,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:50:58,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1876192723, now seen corresponding path program 2 times [2022-01-19 02:50:58,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:50:58,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40111630] [2022-01-19 02:50:58,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:50:58,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:50:58,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:50:58,577 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 02:50:58,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:50:58,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40111630] [2022-01-19 02:50:58,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40111630] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:50:58,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 02:50:58,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 02:50:58,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199600106] [2022-01-19 02:50:58,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:50:58,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 02:50:58,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:50:58,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 02:50:58,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-19 02:50:58,580 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-01-19 02:50:58,581 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 73 transitions, 210 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:50:58,581 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:50:58,581 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-01-19 02:50:58,581 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:50:58,660 INFO L129 PetriNetUnfolder]: 55/236 cut-off events. [2022-01-19 02:50:58,660 INFO L130 PetriNetUnfolder]: For 144/158 co-relation queries the response was YES. [2022-01-19 02:50:58,661 INFO L84 FinitePrefix]: Finished finitePrefix Result has 501 conditions, 236 events. 55/236 cut-off events. For 144/158 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 901 event pairs, 7 based on Foata normal form. 5/235 useless extension candidates. Maximal degree in co-relation 494. Up to 94 conditions per place. [2022-01-19 02:50:58,663 INFO L132 encePairwiseOnDemand]: 75/84 looper letters, 33 selfloop transitions, 7 changer transitions 5/88 dead transitions. [2022-01-19 02:50:58,663 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 88 transitions, 356 flow [2022-01-19 02:50:58,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 02:50:58,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 02:50:58,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 360 transitions. [2022-01-19 02:50:58,664 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2022-01-19 02:50:58,664 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 360 transitions. [2022-01-19 02:50:58,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 360 transitions. [2022-01-19 02:50:58,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:50:58,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 360 transitions. [2022-01-19 02:50:58,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 60.0) internal successors, (360), 6 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 02:50:58,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:50:58,667 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:50:58,668 INFO L186 Difference]: Start difference. First operand has 79 places, 73 transitions, 210 flow. Second operand 6 states and 360 transitions. [2022-01-19 02:50:58,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 88 transitions, 356 flow [2022-01-19 02:50:58,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 88 transitions, 352 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-01-19 02:50:58,674 INFO L242 Difference]: Finished difference. Result has 84 places, 75 transitions, 246 flow [2022-01-19 02:50:58,674 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=246, PETRI_PLACES=84, PETRI_TRANSITIONS=75} [2022-01-19 02:50:58,675 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 10 predicate places. [2022-01-19 02:50:58,675 INFO L470 AbstractCegarLoop]: Abstraction has has 84 places, 75 transitions, 246 flow [2022-01-19 02:50:58,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:50:58,675 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:50:58,676 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] [2022-01-19 02:50:58,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-19 02:50:58,676 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:50:58,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:50:58,677 INFO L85 PathProgramCache]: Analyzing trace with hash 849329763, now seen corresponding path program 1 times [2022-01-19 02:50:58,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:50:58,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753146719] [2022-01-19 02:50:58,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:50:58,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:50:58,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:50:58,780 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 02:50:58,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:50:58,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753146719] [2022-01-19 02:50:58,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753146719] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:50:58,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 02:50:58,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-19 02:50:58,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763879251] [2022-01-19 02:50:58,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:50:58,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-19 02:50:58,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:50:58,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-19 02:50:58,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-19 02:50:58,785 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-01-19 02:50:58,785 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 75 transitions, 246 flow. Second operand has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:50:58,785 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:50:58,786 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-01-19 02:50:58,786 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:50:58,893 INFO L129 PetriNetUnfolder]: 50/227 cut-off events. [2022-01-19 02:50:58,893 INFO L130 PetriNetUnfolder]: For 199/203 co-relation queries the response was YES. [2022-01-19 02:50:58,894 INFO L84 FinitePrefix]: Finished finitePrefix Result has 516 conditions, 227 events. 50/227 cut-off events. For 199/203 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 789 event pairs, 12 based on Foata normal form. 8/230 useless extension candidates. Maximal degree in co-relation 506. Up to 57 conditions per place. [2022-01-19 02:50:58,895 INFO L132 encePairwiseOnDemand]: 74/84 looper letters, 33 selfloop transitions, 11 changer transitions 4/91 dead transitions. [2022-01-19 02:50:58,895 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 91 transitions, 402 flow [2022-01-19 02:50:58,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-19 02:50:58,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-01-19 02:50:58,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 417 transitions. [2022-01-19 02:50:58,897 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7091836734693877 [2022-01-19 02:50:58,897 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 417 transitions. [2022-01-19 02:50:58,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 417 transitions. [2022-01-19 02:50:58,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:50:58,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 417 transitions. [2022-01-19 02:50:58,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 59.57142857142857) internal successors, (417), 7 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:50:58,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:50:58,899 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:50:58,900 INFO L186 Difference]: Start difference. First operand has 84 places, 75 transitions, 246 flow. Second operand 7 states and 417 transitions. [2022-01-19 02:50:58,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 91 transitions, 402 flow [2022-01-19 02:50:58,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 91 transitions, 390 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-01-19 02:50:58,905 INFO L242 Difference]: Finished difference. Result has 89 places, 75 transitions, 273 flow [2022-01-19 02:50:58,905 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=273, PETRI_PLACES=89, PETRI_TRANSITIONS=75} [2022-01-19 02:50:58,907 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 15 predicate places. [2022-01-19 02:50:58,907 INFO L470 AbstractCegarLoop]: Abstraction has has 89 places, 75 transitions, 273 flow [2022-01-19 02:50:58,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:50:58,908 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:50:58,908 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] [2022-01-19 02:50:58,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-19 02:50:58,908 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:50:58,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:50:58,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1010787432, now seen corresponding path program 1 times [2022-01-19 02:50:58,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:50:58,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4433240] [2022-01-19 02:50:58,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:50:58,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:50:58,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:50:59,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:50:59,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:50:59,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4433240] [2022-01-19 02:50:59,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4433240] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:50:59,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184629573] [2022-01-19 02:50:59,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:50:59,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:50:59,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:50:59,076 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 02:50:59,111 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 02:50:59,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:50:59,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-19 02:50:59,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:50:59,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:50:59,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:50:59,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:50:59,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184629573] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:50:59,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:50:59,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2022-01-19 02:50:59,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612359584] [2022-01-19 02:50:59,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:50:59,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-19 02:50:59,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:50:59,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-19 02:50:59,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-01-19 02:50:59,819 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 02:50:59,821 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 75 transitions, 273 flow. Second operand has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:50:59,821 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:50:59,821 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 02:50:59,821 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:51:01,636 INFO L129 PetriNetUnfolder]: 201/619 cut-off events. [2022-01-19 02:51:01,636 INFO L130 PetriNetUnfolder]: For 885/885 co-relation queries the response was YES. [2022-01-19 02:51:01,638 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1726 conditions, 619 events. 201/619 cut-off events. For 885/885 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3349 event pairs, 9 based on Foata normal form. 18/632 useless extension candidates. Maximal degree in co-relation 1714. Up to 96 conditions per place. [2022-01-19 02:51:01,641 INFO L132 encePairwiseOnDemand]: 66/84 looper letters, 105 selfloop transitions, 136 changer transitions 4/286 dead transitions. [2022-01-19 02:51:01,641 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 286 transitions, 1774 flow [2022-01-19 02:51:01,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-19 02:51:01,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-01-19 02:51:01,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3453 transitions. [2022-01-19 02:51:01,646 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6524943310657596 [2022-01-19 02:51:01,647 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3453 transitions. [2022-01-19 02:51:01,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3453 transitions. [2022-01-19 02:51:01,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:51:01,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3453 transitions. [2022-01-19 02:51:01,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 54.80952380952381) internal successors, (3453), 63 states have internal predecessors, (3453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:01,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 84.0) internal successors, (5376), 64 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:01,663 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 84.0) internal successors, (5376), 64 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:01,664 INFO L186 Difference]: Start difference. First operand has 89 places, 75 transitions, 273 flow. Second operand 63 states and 3453 transitions. [2022-01-19 02:51:01,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 286 transitions, 1774 flow [2022-01-19 02:51:01,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 286 transitions, 1745 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-01-19 02:51:01,674 INFO L242 Difference]: Finished difference. Result has 165 places, 217 transitions, 1436 flow [2022-01-19 02:51:01,674 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=1436, PETRI_PLACES=165, PETRI_TRANSITIONS=217} [2022-01-19 02:51:01,676 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 91 predicate places. [2022-01-19 02:51:01,676 INFO L470 AbstractCegarLoop]: Abstraction has has 165 places, 217 transitions, 1436 flow [2022-01-19 02:51:01,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:01,677 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:51:01,677 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] [2022-01-19 02:51:01,703 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 02:51:01,891 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 02:51:01,891 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:51:01,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:51:01,892 INFO L85 PathProgramCache]: Analyzing trace with hash 287847382, now seen corresponding path program 2 times [2022-01-19 02:51:01,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:51:01,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874147183] [2022-01-19 02:51:01,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:51:01,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:51:01,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:51:02,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:51:02,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:51:02,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874147183] [2022-01-19 02:51:02,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874147183] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:51:02,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976563459] [2022-01-19 02:51:02,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 02:51:02,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:51:02,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:51:02,026 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 02:51:02,053 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 02:51:02,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 02:51:02,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:51:02,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-19 02:51:02,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:51:02,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:51:02,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:51:02,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:51:02,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976563459] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:51:02,613 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:51:02,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2022-01-19 02:51:02,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792089130] [2022-01-19 02:51:02,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:51:02,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-19 02:51:02,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:51:02,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-19 02:51:02,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-19 02:51:02,619 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 02:51:02,620 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 217 transitions, 1436 flow. Second operand has 21 states, 21 states have (on average 53.04761904761905) internal successors, (1114), 21 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:02,620 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:51:02,620 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 02:51:02,620 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:51:03,023 INFO L129 PetriNetUnfolder]: 225/686 cut-off events. [2022-01-19 02:51:03,023 INFO L130 PetriNetUnfolder]: For 3231/3231 co-relation queries the response was YES. [2022-01-19 02:51:03,027 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2790 conditions, 686 events. 225/686 cut-off events. For 3231/3231 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3957 event pairs, 18 based on Foata normal form. 1/683 useless extension candidates. Maximal degree in co-relation 2759. Up to 180 conditions per place. [2022-01-19 02:51:03,031 INFO L132 encePairwiseOnDemand]: 67/84 looper letters, 80 selfloop transitions, 170 changer transitions 15/306 dead transitions. [2022-01-19 02:51:03,032 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 306 transitions, 2719 flow [2022-01-19 02:51:03,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-19 02:51:03,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-01-19 02:51:03,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1093 transitions. [2022-01-19 02:51:03,035 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6505952380952381 [2022-01-19 02:51:03,035 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1093 transitions. [2022-01-19 02:51:03,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1093 transitions. [2022-01-19 02:51:03,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:51:03,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1093 transitions. [2022-01-19 02:51:03,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 54.65) internal successors, (1093), 20 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:03,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 84.0) internal successors, (1764), 21 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:03,041 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 84.0) internal successors, (1764), 21 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:03,041 INFO L186 Difference]: Start difference. First operand has 165 places, 217 transitions, 1436 flow. Second operand 20 states and 1093 transitions. [2022-01-19 02:51:03,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 306 transitions, 2719 flow [2022-01-19 02:51:03,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 306 transitions, 2517 flow, removed 88 selfloop flow, removed 7 redundant places. [2022-01-19 02:51:03,069 INFO L242 Difference]: Finished difference. Result has 182 places, 270 transitions, 2130 flow [2022-01-19 02:51:03,069 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=1292, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2130, PETRI_PLACES=182, PETRI_TRANSITIONS=270} [2022-01-19 02:51:03,070 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 108 predicate places. [2022-01-19 02:51:03,070 INFO L470 AbstractCegarLoop]: Abstraction has has 182 places, 270 transitions, 2130 flow [2022-01-19 02:51:03,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.04761904761905) internal successors, (1114), 21 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:03,070 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:51:03,071 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] [2022-01-19 02:51:03,096 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 02:51:03,283 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 02:51:03,284 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:51:03,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:51:03,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1523094532, now seen corresponding path program 3 times [2022-01-19 02:51:03,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:51:03,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907122659] [2022-01-19 02:51:03,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:51:03,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:51:03,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:51:03,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:51:03,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:51:03,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907122659] [2022-01-19 02:51:03,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907122659] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:51:03,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603973765] [2022-01-19 02:51:03,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 02:51:03,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:51:03,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:51:03,436 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 02:51:03,463 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 02:51:03,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 02:51:03,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:51:03,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-19 02:51:03,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:51:03,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:51:03,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:51:04,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:51:04,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603973765] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:51:04,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:51:04,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2022-01-19 02:51:04,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049064813] [2022-01-19 02:51:04,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:51:04,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-19 02:51:04,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:51:04,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-19 02:51:04,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2022-01-19 02:51:04,127 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 02:51:04,128 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 270 transitions, 2130 flow. Second operand has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:04,128 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:51:04,128 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 02:51:04,128 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:51:05,450 INFO L129 PetriNetUnfolder]: 361/1083 cut-off events. [2022-01-19 02:51:05,450 INFO L130 PetriNetUnfolder]: For 6555/6555 co-relation queries the response was YES. [2022-01-19 02:51:05,456 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4814 conditions, 1083 events. 361/1083 cut-off events. For 6555/6555 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7333 event pairs, 3 based on Foata normal form. 26/1108 useless extension candidates. Maximal degree in co-relation 4778. Up to 167 conditions per place. [2022-01-19 02:51:05,463 INFO L132 encePairwiseOnDemand]: 66/84 looper letters, 170 selfloop transitions, 270 changer transitions 79/560 dead transitions. [2022-01-19 02:51:05,463 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 560 transitions, 5808 flow [2022-01-19 02:51:05,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-19 02:51:05,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-01-19 02:51:05,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2524 transitions. [2022-01-19 02:51:05,467 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6532091097308489 [2022-01-19 02:51:05,468 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2524 transitions. [2022-01-19 02:51:05,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2524 transitions. [2022-01-19 02:51:05,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:51:05,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2524 transitions. [2022-01-19 02:51:05,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 54.869565217391305) internal successors, (2524), 46 states have internal predecessors, (2524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:05,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 84.0) internal successors, (3948), 47 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:05,478 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 84.0) internal successors, (3948), 47 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:05,478 INFO L186 Difference]: Start difference. First operand has 182 places, 270 transitions, 2130 flow. Second operand 46 states and 2524 transitions. [2022-01-19 02:51:05,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 560 transitions, 5808 flow [2022-01-19 02:51:05,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 560 transitions, 5385 flow, removed 113 selfloop flow, removed 9 redundant places. [2022-01-19 02:51:05,517 INFO L242 Difference]: Finished difference. Result has 243 places, 426 transitions, 4246 flow [2022-01-19 02:51:05,517 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=1955, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=4246, PETRI_PLACES=243, PETRI_TRANSITIONS=426} [2022-01-19 02:51:05,518 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 169 predicate places. [2022-01-19 02:51:05,518 INFO L470 AbstractCegarLoop]: Abstraction has has 243 places, 426 transitions, 4246 flow [2022-01-19 02:51:05,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:05,519 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:51:05,519 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] [2022-01-19 02:51:05,536 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 02:51:05,721 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 02:51:05,721 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:51:05,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:51:05,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1847654156, now seen corresponding path program 4 times [2022-01-19 02:51:05,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:51:05,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004039887] [2022-01-19 02:51:05,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:51:05,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:51:05,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:51:05,840 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 02:51:05,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:51:05,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004039887] [2022-01-19 02:51:05,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004039887] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:51:05,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 02:51:05,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-19 02:51:05,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715388997] [2022-01-19 02:51:05,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:51:05,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-19 02:51:05,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:51:05,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-19 02:51:05,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-01-19 02:51:05,843 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 02:51:05,843 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 426 transitions, 4246 flow. Second operand has 12 states, 12 states have (on average 53.166666666666664) internal successors, (638), 12 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:05,843 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:51:05,843 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 02:51:05,843 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:51:06,247 INFO L129 PetriNetUnfolder]: 314/871 cut-off events. [2022-01-19 02:51:06,247 INFO L130 PetriNetUnfolder]: For 8002/8002 co-relation queries the response was YES. [2022-01-19 02:51:06,253 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4851 conditions, 871 events. 314/871 cut-off events. For 8002/8002 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4969 event pairs, 15 based on Foata normal form. 1/868 useless extension candidates. Maximal degree in co-relation 4788. Up to 279 conditions per place. [2022-01-19 02:51:06,259 INFO L132 encePairwiseOnDemand]: 69/84 looper letters, 175 selfloop transitions, 295 changer transitions 6/517 dead transitions. [2022-01-19 02:51:06,260 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 517 transitions, 6195 flow [2022-01-19 02:51:06,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-19 02:51:06,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-01-19 02:51:06,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1197 transitions. [2022-01-19 02:51:06,262 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6477272727272727 [2022-01-19 02:51:06,262 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1197 transitions. [2022-01-19 02:51:06,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1197 transitions. [2022-01-19 02:51:06,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:51:06,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1197 transitions. [2022-01-19 02:51:06,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 54.40909090909091) internal successors, (1197), 22 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:06,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 84.0) internal successors, (1932), 23 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:06,267 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 84.0) internal successors, (1932), 23 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:06,267 INFO L186 Difference]: Start difference. First operand has 243 places, 426 transitions, 4246 flow. Second operand 22 states and 1197 transitions. [2022-01-19 02:51:06,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 517 transitions, 6195 flow [2022-01-19 02:51:06,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 517 transitions, 5917 flow, removed 63 selfloop flow, removed 19 redundant places. [2022-01-19 02:51:06,329 INFO L242 Difference]: Finished difference. Result has 246 places, 500 transitions, 5637 flow [2022-01-19 02:51:06,329 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=4024, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5637, PETRI_PLACES=246, PETRI_TRANSITIONS=500} [2022-01-19 02:51:06,330 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 172 predicate places. [2022-01-19 02:51:06,330 INFO L470 AbstractCegarLoop]: Abstraction has has 246 places, 500 transitions, 5637 flow [2022-01-19 02:51:06,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 53.166666666666664) internal successors, (638), 12 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:06,331 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:51:06,331 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] [2022-01-19 02:51:06,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-19 02:51:06,331 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:51:06,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:51:06,331 INFO L85 PathProgramCache]: Analyzing trace with hash -62005542, now seen corresponding path program 5 times [2022-01-19 02:51:06,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:51:06,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348561308] [2022-01-19 02:51:06,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:51:06,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:51:06,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:51:06,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:51:06,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:51:06,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348561308] [2022-01-19 02:51:06,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348561308] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:51:06,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765485413] [2022-01-19 02:51:06,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 02:51:06,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:51:06,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:51:06,464 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 02:51:06,465 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 02:51:06,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 02:51:06,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:51:06,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-19 02:51:06,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:51:06,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:51:06,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:51:07,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:51:07,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765485413] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:51:07,104 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:51:07,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 20 [2022-01-19 02:51:07,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518965907] [2022-01-19 02:51:07,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:51:07,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-19 02:51:07,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:51:07,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-19 02:51:07,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-01-19 02:51:07,106 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 02:51:07,107 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 500 transitions, 5637 flow. Second operand has 20 states, 20 states have (on average 53.05) internal successors, (1061), 20 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:07,108 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:51:07,108 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 02:51:07,108 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:51:07,904 INFO L129 PetriNetUnfolder]: 567/1576 cut-off events. [2022-01-19 02:51:07,904 INFO L130 PetriNetUnfolder]: For 13284/13284 co-relation queries the response was YES. [2022-01-19 02:51:07,915 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9283 conditions, 1576 events. 567/1576 cut-off events. For 13284/13284 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11129 event pairs, 18 based on Foata normal form. 2/1574 useless extension candidates. Maximal degree in co-relation 9220. Up to 256 conditions per place. [2022-01-19 02:51:07,931 INFO L132 encePairwiseOnDemand]: 67/84 looper letters, 239 selfloop transitions, 614 changer transitions 38/932 dead transitions. [2022-01-19 02:51:07,931 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 932 transitions, 12681 flow [2022-01-19 02:51:07,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-19 02:51:07,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-01-19 02:51:07,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1756 transitions. [2022-01-19 02:51:07,936 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6532738095238095 [2022-01-19 02:51:07,937 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1756 transitions. [2022-01-19 02:51:07,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1756 transitions. [2022-01-19 02:51:07,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:51:07,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1756 transitions. [2022-01-19 02:51:07,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 54.875) internal successors, (1756), 32 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:07,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 84.0) internal successors, (2772), 33 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:07,949 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 84.0) internal successors, (2772), 33 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:07,950 INFO L186 Difference]: Start difference. First operand has 246 places, 500 transitions, 5637 flow. Second operand 32 states and 1756 transitions. [2022-01-19 02:51:07,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 932 transitions, 12681 flow [2022-01-19 02:51:08,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 932 transitions, 12327 flow, removed 76 selfloop flow, removed 4 redundant places. [2022-01-19 02:51:08,082 INFO L242 Difference]: Finished difference. Result has 278 places, 794 transitions, 10901 flow [2022-01-19 02:51:08,083 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=5435, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=333, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=10901, PETRI_PLACES=278, PETRI_TRANSITIONS=794} [2022-01-19 02:51:08,083 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 204 predicate places. [2022-01-19 02:51:08,083 INFO L470 AbstractCegarLoop]: Abstraction has has 278 places, 794 transitions, 10901 flow [2022-01-19 02:51:08,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 53.05) internal successors, (1061), 20 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:08,084 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:51:08,084 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] [2022-01-19 02:51:08,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-19 02:51:08,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-19 02:51:08,285 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:51:08,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:51:08,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1407155104, now seen corresponding path program 6 times [2022-01-19 02:51:08,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:51:08,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009801019] [2022-01-19 02:51:08,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:51:08,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:51:08,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:51:08,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:51:08,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:51:08,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009801019] [2022-01-19 02:51:08,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009801019] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:51:08,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540970024] [2022-01-19 02:51:08,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 02:51:08,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:51:08,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:51:08,415 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 02:51:08,415 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 02:51:08,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-19 02:51:08,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:51:08,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-19 02:51:08,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:51:08,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:51:08,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:51:08,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 02:51:08,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540970024] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:51:08,987 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:51:08,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2022-01-19 02:51:08,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585514103] [2022-01-19 02:51:08,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:51:08,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-19 02:51:08,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:51:08,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-19 02:51:08,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-01-19 02:51:08,989 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 02:51:08,991 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 794 transitions, 10901 flow. Second operand has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:08,991 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:51:08,991 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 02:51:08,991 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:51:10,664 INFO L129 PetriNetUnfolder]: 982/2557 cut-off events. [2022-01-19 02:51:10,664 INFO L130 PetriNetUnfolder]: For 28769/28769 co-relation queries the response was YES. [2022-01-19 02:51:10,681 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17094 conditions, 2557 events. 982/2557 cut-off events. For 28769/28769 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 19689 event pairs, 12 based on Foata normal form. 28/2582 useless extension candidates. Maximal degree in co-relation 17026. Up to 408 conditions per place. [2022-01-19 02:51:10,701 INFO L132 encePairwiseOnDemand]: 65/84 looper letters, 300 selfloop transitions, 1101 changer transitions 20/1462 dead transitions. [2022-01-19 02:51:10,701 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 1462 transitions, 22972 flow [2022-01-19 02:51:10,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-19 02:51:10,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-01-19 02:51:10,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2711 transitions. [2022-01-19 02:51:10,706 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6586491739552964 [2022-01-19 02:51:10,706 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2711 transitions. [2022-01-19 02:51:10,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2711 transitions. [2022-01-19 02:51:10,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:51:10,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2711 transitions. [2022-01-19 02:51:10,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 55.326530612244895) internal successors, (2711), 49 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:10,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 84.0) internal successors, (4200), 50 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 02:51:10,722 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 84.0) internal successors, (4200), 50 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 02:51:10,722 INFO L186 Difference]: Start difference. First operand has 278 places, 794 transitions, 10901 flow. Second operand 49 states and 2711 transitions. [2022-01-19 02:51:10,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 1462 transitions, 22972 flow [2022-01-19 02:51:10,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 1462 transitions, 21639 flow, removed 94 selfloop flow, removed 14 redundant places. [2022-01-19 02:51:10,923 INFO L242 Difference]: Finished difference. Result has 321 places, 1303 transitions, 20930 flow [2022-01-19 02:51:10,924 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=10193, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=615, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=20930, PETRI_PLACES=321, PETRI_TRANSITIONS=1303} [2022-01-19 02:51:10,924 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 247 predicate places. [2022-01-19 02:51:10,925 INFO L470 AbstractCegarLoop]: Abstraction has has 321 places, 1303 transitions, 20930 flow [2022-01-19 02:51:10,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:10,925 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:51:10,926 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] [2022-01-19 02:51:10,948 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 02:51:11,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:51:11,140 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:51:11,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:51:11,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1158995784, now seen corresponding path program 7 times [2022-01-19 02:51:11,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:51:11,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38094336] [2022-01-19 02:51:11,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:51:11,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:51:11,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:51:11,250 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 02:51:11,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:51:11,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38094336] [2022-01-19 02:51:11,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38094336] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:51:11,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 02:51:11,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-19 02:51:11,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150813810] [2022-01-19 02:51:11,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:51:11,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-19 02:51:11,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:51:11,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-19 02:51:11,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-01-19 02:51:11,252 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 02:51:11,253 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 1303 transitions, 20930 flow. Second operand has 12 states, 12 states have (on average 53.166666666666664) internal successors, (638), 12 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:11,253 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:51:11,253 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 02:51:11,253 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:51:12,265 INFO L129 PetriNetUnfolder]: 1036/2642 cut-off events. [2022-01-19 02:51:12,265 INFO L130 PetriNetUnfolder]: For 37927/37927 co-relation queries the response was YES. [2022-01-19 02:51:12,287 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20039 conditions, 2642 events. 1036/2642 cut-off events. For 37927/37927 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 20325 event pairs, 36 based on Foata normal form. 1/2632 useless extension candidates. Maximal degree in co-relation 19955. Up to 1358 conditions per place. [2022-01-19 02:51:12,309 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 930 selfloop transitions, 461 changer transitions 6/1438 dead transitions. [2022-01-19 02:51:12,310 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 1438 transitions, 25804 flow [2022-01-19 02:51:12,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-19 02:51:12,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-01-19 02:51:12,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 824 transitions. [2022-01-19 02:51:12,311 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.653968253968254 [2022-01-19 02:51:12,311 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 824 transitions. [2022-01-19 02:51:12,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 824 transitions. [2022-01-19 02:51:12,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:51:12,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 824 transitions. [2022-01-19 02:51:12,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 54.93333333333333) internal successors, (824), 15 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:12,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 84.0) internal successors, (1344), 16 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:12,315 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 84.0) internal successors, (1344), 16 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:12,315 INFO L186 Difference]: Start difference. First operand has 321 places, 1303 transitions, 20930 flow. Second operand 15 states and 824 transitions. [2022-01-19 02:51:12,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 1438 transitions, 25804 flow [2022-01-19 02:51:12,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 1438 transitions, 25588 flow, removed 82 selfloop flow, removed 10 redundant places. [2022-01-19 02:51:12,756 INFO L242 Difference]: Finished difference. Result has 332 places, 1402 transitions, 23575 flow [2022-01-19 02:51:12,757 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=20730, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=362, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=889, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=23575, PETRI_PLACES=332, PETRI_TRANSITIONS=1402} [2022-01-19 02:51:12,758 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 258 predicate places. [2022-01-19 02:51:12,758 INFO L470 AbstractCegarLoop]: Abstraction has has 332 places, 1402 transitions, 23575 flow [2022-01-19 02:51:12,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 53.166666666666664) internal successors, (638), 12 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:12,758 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:51:12,758 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] [2022-01-19 02:51:12,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-19 02:51:12,759 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:51:12,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:51:12,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1793899132, now seen corresponding path program 8 times [2022-01-19 02:51:12,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:51:12,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429075656] [2022-01-19 02:51:12,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:51:12,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:51:12,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:51:12,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:51:12,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:51:12,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429075656] [2022-01-19 02:51:12,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429075656] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:51:12,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798321197] [2022-01-19 02:51:12,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 02:51:12,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:51:12,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:51:12,877 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 02:51:12,909 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 02:51:12,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 02:51:12,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:51:12,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-19 02:51:12,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:51:13,256 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 02:51:13,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-19 02:51:13,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798321197] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:51:13,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-19 02:51:13,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2022-01-19 02:51:13,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101389846] [2022-01-19 02:51:13,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:51:13,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-19 02:51:13,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:51:13,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-19 02:51:13,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-01-19 02:51:13,258 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 02:51:13,259 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 1402 transitions, 23575 flow. Second operand has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:13,259 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:51:13,259 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 02:51:13,259 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:51:14,565 INFO L129 PetriNetUnfolder]: 1119/2881 cut-off events. [2022-01-19 02:51:14,566 INFO L130 PetriNetUnfolder]: For 44562/44562 co-relation queries the response was YES. [2022-01-19 02:51:14,588 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22448 conditions, 2881 events. 1119/2881 cut-off events. For 44562/44562 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 22704 event pairs, 49 based on Foata normal form. 2/2874 useless extension candidates. Maximal degree in co-relation 22357. Up to 2190 conditions per place. [2022-01-19 02:51:14,604 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 1359 selfloop transitions, 131 changer transitions 13/1544 dead transitions. [2022-01-19 02:51:14,604 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 1544 transitions, 28749 flow [2022-01-19 02:51:14,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-19 02:51:14,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-01-19 02:51:14,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1006 transitions. [2022-01-19 02:51:14,608 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6653439153439153 [2022-01-19 02:51:14,609 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1006 transitions. [2022-01-19 02:51:14,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1006 transitions. [2022-01-19 02:51:14,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:51:14,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1006 transitions. [2022-01-19 02:51:14,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 55.888888888888886) internal successors, (1006), 18 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:14,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:14,612 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:14,612 INFO L186 Difference]: Start difference. First operand has 332 places, 1402 transitions, 23575 flow. Second operand 18 states and 1006 transitions. [2022-01-19 02:51:14,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 1544 transitions, 28749 flow [2022-01-19 02:51:15,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 1544 transitions, 28653 flow, removed 48 selfloop flow, removed 3 redundant places. [2022-01-19 02:51:15,057 INFO L242 Difference]: Finished difference. Result has 353 places, 1488 transitions, 25330 flow [2022-01-19 02:51:15,058 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=23493, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=25330, PETRI_PLACES=353, PETRI_TRANSITIONS=1488} [2022-01-19 02:51:15,059 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 279 predicate places. [2022-01-19 02:51:15,059 INFO L470 AbstractCegarLoop]: Abstraction has has 353 places, 1488 transitions, 25330 flow [2022-01-19 02:51:15,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:15,059 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:51:15,059 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] [2022-01-19 02:51:15,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-19 02:51:15,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:51:15,269 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:51:15,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:51:15,269 INFO L85 PathProgramCache]: Analyzing trace with hash 82329012, now seen corresponding path program 9 times [2022-01-19 02:51:15,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:51:15,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041828419] [2022-01-19 02:51:15,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:51:15,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:51:15,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:51:15,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:51:15,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:51:15,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041828419] [2022-01-19 02:51:15,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041828419] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:51:15,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694770265] [2022-01-19 02:51:15,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 02:51:15,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:51:15,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:51:15,371 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 02:51:15,381 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 02:51:15,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 02:51:15,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:51:15,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-19 02:51:15,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:51:15,735 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 02:51:15,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-19 02:51:15,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694770265] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 02:51:15,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-19 02:51:15,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2022-01-19 02:51:15,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455501818] [2022-01-19 02:51:15,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 02:51:15,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-19 02:51:15,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:51:15,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-19 02:51:15,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-01-19 02:51:15,737 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 02:51:15,738 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 1488 transitions, 25330 flow. Second operand has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:15,738 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:51:15,738 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 02:51:15,738 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:51:17,323 INFO L129 PetriNetUnfolder]: 1321/3449 cut-off events. [2022-01-19 02:51:17,323 INFO L130 PetriNetUnfolder]: For 56686/56686 co-relation queries the response was YES. [2022-01-19 02:51:17,348 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27325 conditions, 3449 events. 1321/3449 cut-off events. For 56686/56686 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 28633 event pairs, 51 based on Foata normal form. 1/3439 useless extension candidates. Maximal degree in co-relation 27226. Up to 2392 conditions per place. [2022-01-19 02:51:17,370 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 1537 selfloop transitions, 196 changer transitions 10/1784 dead transitions. [2022-01-19 02:51:17,370 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1784 transitions, 34189 flow [2022-01-19 02:51:17,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-19 02:51:17,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-01-19 02:51:17,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 910 transitions. [2022-01-19 02:51:17,371 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6770833333333334 [2022-01-19 02:51:17,371 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 910 transitions. [2022-01-19 02:51:17,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 910 transitions. [2022-01-19 02:51:17,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:51:17,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 910 transitions. [2022-01-19 02:51:17,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 56.875) internal successors, (910), 16 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:17,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 84.0) internal successors, (1428), 17 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:17,375 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 84.0) internal successors, (1428), 17 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:17,375 INFO L186 Difference]: Start difference. First operand has 353 places, 1488 transitions, 25330 flow. Second operand 16 states and 910 transitions. [2022-01-19 02:51:17,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1784 transitions, 34189 flow [2022-01-19 02:51:17,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 1784 transitions, 33987 flow, removed 83 selfloop flow, removed 7 redundant places. [2022-01-19 02:51:17,902 INFO L242 Difference]: Finished difference. Result has 369 places, 1646 transitions, 28977 flow [2022-01-19 02:51:17,903 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=25154, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=28977, PETRI_PLACES=369, PETRI_TRANSITIONS=1646} [2022-01-19 02:51:17,904 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 295 predicate places. [2022-01-19 02:51:17,904 INFO L470 AbstractCegarLoop]: Abstraction has has 369 places, 1646 transitions, 28977 flow [2022-01-19 02:51:17,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:17,904 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:51:17,904 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] [2022-01-19 02:51:17,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-19 02:51:18,126 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,SelfDestructingSolverStorable13 [2022-01-19 02:51:18,127 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:51:18,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:51:18,127 INFO L85 PathProgramCache]: Analyzing trace with hash 540301936, now seen corresponding path program 10 times [2022-01-19 02:51:18,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:51:18,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816991680] [2022-01-19 02:51:18,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:51:18,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:51:18,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:51:18,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:51:18,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:51:18,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816991680] [2022-01-19 02:51:18,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816991680] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:51:18,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727289757] [2022-01-19 02:51:18,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 02:51:18,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:51:18,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:51:18,238 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 02:51:18,239 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 02:51:18,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 02:51:18,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:51:18,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-19 02:51:18,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:51:18,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:51:18,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:51:19,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 02:51:19,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727289757] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:51:19,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:51:19,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2022-01-19 02:51:19,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895181742] [2022-01-19 02:51:19,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:51:19,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-19 02:51:19,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:51:19,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-19 02:51:19,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-01-19 02:51:19,012 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 02:51:19,013 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 1646 transitions, 28977 flow. Second operand has 24 states, 24 states have (on average 53.541666666666664) internal successors, (1285), 24 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:19,013 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:51:19,013 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 02:51:19,013 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:51:22,214 INFO L129 PetriNetUnfolder]: 1622/4164 cut-off events. [2022-01-19 02:51:22,214 INFO L130 PetriNetUnfolder]: For 82597/82597 co-relation queries the response was YES. [2022-01-19 02:51:22,256 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35136 conditions, 4164 events. 1622/4164 cut-off events. For 82597/82597 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 35778 event pairs, 48 based on Foata normal form. 27/4176 useless extension candidates. Maximal degree in co-relation 35028. Up to 1770 conditions per place. [2022-01-19 02:51:22,284 INFO L132 encePairwiseOnDemand]: 65/84 looper letters, 1090 selfloop transitions, 1089 changer transitions 11/2231 dead transitions. [2022-01-19 02:51:22,284 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 2231 transitions, 44432 flow [2022-01-19 02:51:22,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-19 02:51:22,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-01-19 02:51:22,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3263 transitions. [2022-01-19 02:51:22,289 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.647420634920635 [2022-01-19 02:51:22,289 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3263 transitions. [2022-01-19 02:51:22,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3263 transitions. [2022-01-19 02:51:22,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:51:22,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3263 transitions. [2022-01-19 02:51:22,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 54.38333333333333) internal successors, (3263), 60 states have internal predecessors, (3263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:22,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 84.0) internal successors, (5124), 61 states have internal predecessors, (5124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:22,300 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 84.0) internal successors, (5124), 61 states have internal predecessors, (5124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:22,300 INFO L186 Difference]: Start difference. First operand has 369 places, 1646 transitions, 28977 flow. Second operand 60 states and 3263 transitions. [2022-01-19 02:51:22,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 2231 transitions, 44432 flow [2022-01-19 02:51:23,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 2231 transitions, 44144 flow, removed 128 selfloop flow, removed 6 redundant places. [2022-01-19 02:51:23,081 INFO L242 Difference]: Finished difference. Result has 451 places, 2125 transitions, 42403 flow [2022-01-19 02:51:23,082 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=28755, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=681, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=839, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=42403, PETRI_PLACES=451, PETRI_TRANSITIONS=2125} [2022-01-19 02:51:23,082 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 377 predicate places. [2022-01-19 02:51:23,083 INFO L470 AbstractCegarLoop]: Abstraction has has 451 places, 2125 transitions, 42403 flow [2022-01-19 02:51:23,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.541666666666664) internal successors, (1285), 24 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:23,083 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:51:23,083 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 02:51:23,108 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 02:51:23,297 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,SelfDestructingSolverStorable14 [2022-01-19 02:51:23,298 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:51:23,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:51:23,298 INFO L85 PathProgramCache]: Analyzing trace with hash 564935951, now seen corresponding path program 11 times [2022-01-19 02:51:23,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:51:23,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874869161] [2022-01-19 02:51:23,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:51:23,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:51:23,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:51:23,373 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:51:23,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:51:23,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874869161] [2022-01-19 02:51:23,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874869161] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:51:23,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287403918] [2022-01-19 02:51:23,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 02:51:23,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:51:23,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:51:23,376 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 02:51:23,379 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 02:51:23,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 02:51:23,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:51:23,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 02:51:23,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:51:23,737 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:51:23,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:51:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:51:23,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287403918] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:51:23,942 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:51:23,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-19 02:51:23,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594895218] [2022-01-19 02:51:23,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:51:23,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-19 02:51:23,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:51:23,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-19 02:51:23,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-01-19 02:51:23,944 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 02:51:23,945 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 2125 transitions, 42403 flow. Second operand has 21 states, 21 states have (on average 53.80952380952381) internal successors, (1130), 21 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:23,945 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:51:23,945 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 02:51:23,945 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:51:26,632 INFO L129 PetriNetUnfolder]: 1784/4581 cut-off events. [2022-01-19 02:51:26,632 INFO L130 PetriNetUnfolder]: For 123458/123458 co-relation queries the response was YES. [2022-01-19 02:51:26,684 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42750 conditions, 4581 events. 1784/4581 cut-off events. For 123458/123458 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 40291 event pairs, 20 based on Foata normal form. 20/4600 useless extension candidates. Maximal degree in co-relation 42613. Up to 1658 conditions per place. [2022-01-19 02:51:26,828 INFO L132 encePairwiseOnDemand]: 69/84 looper letters, 1530 selfloop transitions, 836 changer transitions 25/2432 dead transitions. [2022-01-19 02:51:26,828 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 2432 transitions, 53222 flow [2022-01-19 02:51:26,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-19 02:51:26,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-01-19 02:51:26,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1071 transitions. [2022-01-19 02:51:26,834 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6710526315789473 [2022-01-19 02:51:26,834 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1071 transitions. [2022-01-19 02:51:26,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1071 transitions. [2022-01-19 02:51:26,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:51:26,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1071 transitions. [2022-01-19 02:51:26,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 56.36842105263158) internal successors, (1071), 19 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:26,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 84.0) internal successors, (1680), 20 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:26,846 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 84.0) internal successors, (1680), 20 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:26,847 INFO L186 Difference]: Start difference. First operand has 451 places, 2125 transitions, 42403 flow. Second operand 19 states and 1071 transitions. [2022-01-19 02:51:26,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 2432 transitions, 53222 flow [2022-01-19 02:51:28,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 2432 transitions, 52251 flow, removed 467 selfloop flow, removed 9 redundant places. [2022-01-19 02:51:28,296 INFO L242 Difference]: Finished difference. Result has 467 places, 2280 transitions, 47920 flow [2022-01-19 02:51:28,298 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=41474, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=692, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=47920, PETRI_PLACES=467, PETRI_TRANSITIONS=2280} [2022-01-19 02:51:28,298 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 393 predicate places. [2022-01-19 02:51:28,298 INFO L470 AbstractCegarLoop]: Abstraction has has 467 places, 2280 transitions, 47920 flow [2022-01-19 02:51:28,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.80952380952381) internal successors, (1130), 21 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:28,298 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:51:28,299 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 02:51:28,314 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 02:51:28,499 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,SelfDestructingSolverStorable15 [2022-01-19 02:51:28,499 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:51:28,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:51:28,499 INFO L85 PathProgramCache]: Analyzing trace with hash 112799897, now seen corresponding path program 12 times [2022-01-19 02:51:28,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:51:28,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612015742] [2022-01-19 02:51:28,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:51:28,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:51:28,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:51:28,578 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 02:51:28,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:51:28,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612015742] [2022-01-19 02:51:28,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612015742] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:51:28,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540591129] [2022-01-19 02:51:28,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 02:51:28,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:51:28,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:51:28,579 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 02:51:28,586 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 02:51:28,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 02:51:28,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:51:28,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 02:51:28,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:51:28,872 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 02:51:28,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:51:29,100 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 02:51:29,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540591129] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:51:29,100 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:51:29,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-19 02:51:29,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27940078] [2022-01-19 02:51:29,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:51:29,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-19 02:51:29,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:51:29,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-19 02:51:29,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-01-19 02:51:29,102 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 02:51:29,103 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 2280 transitions, 47920 flow. Second operand has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:29,103 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:51:29,103 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 02:51:29,103 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:51:33,736 INFO L129 PetriNetUnfolder]: 2209/5776 cut-off events. [2022-01-19 02:51:33,736 INFO L130 PetriNetUnfolder]: For 196158/196158 co-relation queries the response was YES. [2022-01-19 02:51:33,798 INFO L84 FinitePrefix]: Finished finitePrefix Result has 57480 conditions, 5776 events. 2209/5776 cut-off events. For 196158/196158 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 51911 event pairs, 24 based on Foata normal form. 27/5801 useless extension candidates. Maximal degree in co-relation 57336. Up to 1537 conditions per place. [2022-01-19 02:51:33,830 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 1427 selfloop transitions, 1585 changer transitions 34/3087 dead transitions. [2022-01-19 02:51:33,831 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 3087 transitions, 72012 flow [2022-01-19 02:51:33,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-19 02:51:33,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2022-01-19 02:51:33,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 3701 transitions. [2022-01-19 02:51:33,835 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6576048329779673 [2022-01-19 02:51:33,835 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 3701 transitions. [2022-01-19 02:51:33,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 3701 transitions. [2022-01-19 02:51:33,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:51:33,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 3701 transitions. [2022-01-19 02:51:33,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 55.23880597014925) internal successors, (3701), 67 states have internal predecessors, (3701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:33,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 84.0) internal successors, (5712), 68 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:33,845 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 84.0) internal successors, (5712), 68 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:33,846 INFO L186 Difference]: Start difference. First operand has 467 places, 2280 transitions, 47920 flow. Second operand 67 states and 3701 transitions. [2022-01-19 02:51:33,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 3087 transitions, 72012 flow [2022-01-19 02:51:35,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 3087 transitions, 71402 flow, removed 252 selfloop flow, removed 8 redundant places. [2022-01-19 02:51:35,657 INFO L242 Difference]: Finished difference. Result has 560 places, 2887 transitions, 67956 flow [2022-01-19 02:51:35,658 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=47589, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1055, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=67956, PETRI_PLACES=560, PETRI_TRANSITIONS=2887} [2022-01-19 02:51:35,658 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 486 predicate places. [2022-01-19 02:51:35,658 INFO L470 AbstractCegarLoop]: Abstraction has has 560 places, 2887 transitions, 67956 flow [2022-01-19 02:51:35,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:35,659 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:51:35,659 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 02:51:35,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-01-19 02:51:35,859 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,SelfDestructingSolverStorable16 [2022-01-19 02:51:35,859 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:51:35,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:51:35,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1113820109, now seen corresponding path program 13 times [2022-01-19 02:51:35,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:51:35,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34920930] [2022-01-19 02:51:35,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:51:35,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:51:35,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:51:35,928 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:51:35,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:51:35,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34920930] [2022-01-19 02:51:35,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34920930] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:51:35,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977417936] [2022-01-19 02:51:35,929 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 02:51:35,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:51:35,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:51:35,930 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 02:51:35,933 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 02:51:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:51:35,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-19 02:51:35,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:51:36,210 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:51:36,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:51:36,425 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:51:36,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977417936] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:51:36,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:51:36,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-01-19 02:51:36,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837273243] [2022-01-19 02:51:36,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:51:36,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-19 02:51:36,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:51:36,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-19 02:51:36,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-19 02:51:36,430 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 02:51:36,431 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 2887 transitions, 67956 flow. Second operand has 23 states, 23 states have (on average 53.608695652173914) internal successors, (1233), 23 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:36,431 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:51:36,431 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 02:51:36,431 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:51:42,716 INFO L129 PetriNetUnfolder]: 2771/6897 cut-off events. [2022-01-19 02:51:42,716 INFO L130 PetriNetUnfolder]: For 252992/252992 co-relation queries the response was YES. [2022-01-19 02:51:42,816 INFO L84 FinitePrefix]: Finished finitePrefix Result has 76884 conditions, 6897 events. 2771/6897 cut-off events. For 252992/252992 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 62086 event pairs, 63 based on Foata normal form. 4/6871 useless extension candidates. Maximal degree in co-relation 76706. Up to 2758 conditions per place. [2022-01-19 02:51:42,866 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 2004 selfloop transitions, 1770 changer transitions 16/3831 dead transitions. [2022-01-19 02:51:42,866 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 607 places, 3831 transitions, 98908 flow [2022-01-19 02:51:42,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-19 02:51:42,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-01-19 02:51:42,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2628 transitions. [2022-01-19 02:51:42,870 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6517857142857143 [2022-01-19 02:51:42,870 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2628 transitions. [2022-01-19 02:51:42,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2628 transitions. [2022-01-19 02:51:42,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:51:42,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2628 transitions. [2022-01-19 02:51:42,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 54.75) internal successors, (2628), 48 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:42,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 84.0) internal successors, (4116), 49 states have internal predecessors, (4116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:42,878 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 84.0) internal successors, (4116), 49 states have internal predecessors, (4116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:42,878 INFO L186 Difference]: Start difference. First operand has 560 places, 2887 transitions, 67956 flow. Second operand 48 states and 2628 transitions. [2022-01-19 02:51:42,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 607 places, 3831 transitions, 98908 flow [2022-01-19 02:51:46,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 597 places, 3831 transitions, 95167 flow, removed 1769 selfloop flow, removed 10 redundant places. [2022-01-19 02:51:46,631 INFO L242 Difference]: Finished difference. Result has 618 places, 3618 transitions, 90388 flow [2022-01-19 02:51:46,633 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=64885, PETRI_DIFFERENCE_MINUEND_PLACES=550, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2887, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=90388, PETRI_PLACES=618, PETRI_TRANSITIONS=3618} [2022-01-19 02:51:46,634 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 544 predicate places. [2022-01-19 02:51:46,634 INFO L470 AbstractCegarLoop]: Abstraction has has 618 places, 3618 transitions, 90388 flow [2022-01-19 02:51:46,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.608695652173914) internal successors, (1233), 23 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:46,634 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:51:46,634 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 02:51:46,660 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 02:51:46,850 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,SelfDestructingSolverStorable17 [2022-01-19 02:51:46,850 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:51:46,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:51:46,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1983119535, now seen corresponding path program 14 times [2022-01-19 02:51:46,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:51:46,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404221929] [2022-01-19 02:51:46,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:51:46,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:51:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:51:46,915 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 02:51:46,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:51:46,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404221929] [2022-01-19 02:51:46,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404221929] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:51:46,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018836038] [2022-01-19 02:51:46,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 02:51:46,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:51:46,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:51:46,917 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 02:51:46,917 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 02:51:46,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 02:51:46,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:51:46,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 02:51:46,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:51:47,216 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 02:51:47,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:51:47,408 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 02:51:47,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018836038] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:51:47,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:51:47,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-19 02:51:47,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356134974] [2022-01-19 02:51:47,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:51:47,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-19 02:51:47,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:51:47,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-19 02:51:47,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-01-19 02:51:47,410 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 02:51:47,411 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 618 places, 3618 transitions, 90388 flow. Second operand has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:47,411 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:51:47,411 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 02:51:47,411 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:51:55,151 INFO L129 PetriNetUnfolder]: 2798/7022 cut-off events. [2022-01-19 02:51:55,152 INFO L130 PetriNetUnfolder]: For 232993/232993 co-relation queries the response was YES. [2022-01-19 02:51:55,265 INFO L84 FinitePrefix]: Finished finitePrefix Result has 78875 conditions, 7022 events. 2798/7022 cut-off events. For 232993/232993 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 63218 event pairs, 24 based on Foata normal form. 34/7054 useless extension candidates. Maximal degree in co-relation 78679. Up to 2250 conditions per place. [2022-01-19 02:51:55,321 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 1859 selfloop transitions, 1916 changer transitions 26/3842 dead transitions. [2022-01-19 02:51:55,321 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 660 places, 3842 transitions, 102983 flow [2022-01-19 02:51:55,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-19 02:51:55,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-01-19 02:51:55,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 2856 transitions. [2022-01-19 02:51:55,324 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6538461538461539 [2022-01-19 02:51:55,324 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 2856 transitions. [2022-01-19 02:51:55,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 2856 transitions. [2022-01-19 02:51:55,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:51:55,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 2856 transitions. [2022-01-19 02:51:55,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 54.92307692307692) internal successors, (2856), 52 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:55,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 84.0) internal successors, (4452), 53 states have internal predecessors, (4452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:55,332 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 84.0) internal successors, (4452), 53 states have internal predecessors, (4452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:55,332 INFO L186 Difference]: Start difference. First operand has 618 places, 3618 transitions, 90388 flow. Second operand 52 states and 2856 transitions. [2022-01-19 02:51:55,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 660 places, 3842 transitions, 102983 flow [2022-01-19 02:51:59,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 647 places, 3842 transitions, 99752 flow, removed 1518 selfloop flow, removed 13 redundant places. [2022-01-19 02:51:59,289 INFO L242 Difference]: Finished difference. Result has 655 places, 3708 transitions, 95863 flow [2022-01-19 02:51:59,291 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=86776, PETRI_DIFFERENCE_MINUEND_PLACES=596, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1796, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1743, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=95863, PETRI_PLACES=655, PETRI_TRANSITIONS=3708} [2022-01-19 02:51:59,292 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 581 predicate places. [2022-01-19 02:51:59,292 INFO L470 AbstractCegarLoop]: Abstraction has has 655 places, 3708 transitions, 95863 flow [2022-01-19 02:51:59,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:51:59,292 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:51:59,292 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 02:51:59,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-01-19 02:51:59,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:51:59,493 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:51:59,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:51:59,493 INFO L85 PathProgramCache]: Analyzing trace with hash -2116477245, now seen corresponding path program 15 times [2022-01-19 02:51:59,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:51:59,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846720151] [2022-01-19 02:51:59,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:51:59,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:51:59,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:51:59,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 02:51:59,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:51:59,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846720151] [2022-01-19 02:51:59,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846720151] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:51:59,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282870014] [2022-01-19 02:51:59,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 02:51:59,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:51:59,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:51:59,560 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 02:51:59,561 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 02:51:59,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 02:51:59,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:51:59,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 02:51:59,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:51:59,823 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:51:59,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:52:00,029 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:52:00,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282870014] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:52:00,030 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:52:00,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-01-19 02:52:00,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521489982] [2022-01-19 02:52:00,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:52:00,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-19 02:52:00,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:52:00,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-19 02:52:00,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-01-19 02:52:00,031 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 02:52:00,032 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 655 places, 3708 transitions, 95863 flow. Second operand has 23 states, 23 states have (on average 53.608695652173914) internal successors, (1233), 23 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:52:00,032 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:52:00,032 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 02:52:00,032 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:52:10,643 INFO L129 PetriNetUnfolder]: 3715/9539 cut-off events. [2022-01-19 02:52:10,644 INFO L130 PetriNetUnfolder]: For 313244/313244 co-relation queries the response was YES. [2022-01-19 02:52:10,773 INFO L84 FinitePrefix]: Finished finitePrefix Result has 107736 conditions, 9539 events. 3715/9539 cut-off events. For 313244/313244 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 92849 event pairs, 69 based on Foata normal form. 4/9493 useless extension candidates. Maximal degree in co-relation 107537. Up to 2018 conditions per place. [2022-01-19 02:52:10,834 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 1542 selfloop transitions, 3399 changer transitions 8/4990 dead transitions. [2022-01-19 02:52:10,834 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 691 places, 4990 transitions, 141494 flow [2022-01-19 02:52:10,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-19 02:52:10,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-01-19 02:52:10,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2104 transitions. [2022-01-19 02:52:10,836 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6591478696741855 [2022-01-19 02:52:10,836 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2104 transitions. [2022-01-19 02:52:10,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2104 transitions. [2022-01-19 02:52:10,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:52:10,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2104 transitions. [2022-01-19 02:52:10,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 55.36842105263158) internal successors, (2104), 38 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:52:10,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 84.0) internal successors, (3276), 39 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:52:10,840 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 84.0) internal successors, (3276), 39 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:52:10,841 INFO L186 Difference]: Start difference. First operand has 655 places, 3708 transitions, 95863 flow. Second operand 38 states and 2104 transitions. [2022-01-19 02:52:10,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 691 places, 4990 transitions, 141494 flow [2022-01-19 02:52:16,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 665 places, 4990 transitions, 137010 flow, removed 243 selfloop flow, removed 26 redundant places. [2022-01-19 02:52:16,264 INFO L242 Difference]: Finished difference. Result has 687 places, 4777 transitions, 136291 flow [2022-01-19 02:52:16,267 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=92578, PETRI_DIFFERENCE_MINUEND_PLACES=628, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2405, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1021, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=136291, PETRI_PLACES=687, PETRI_TRANSITIONS=4777} [2022-01-19 02:52:16,268 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 613 predicate places. [2022-01-19 02:52:16,268 INFO L470 AbstractCegarLoop]: Abstraction has has 687 places, 4777 transitions, 136291 flow [2022-01-19 02:52:16,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.608695652173914) internal successors, (1233), 23 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:52:16,268 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:52:16,269 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 02:52:16,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-01-19 02:52:16,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:52:16,493 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:52:16,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:52:16,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1543840883, now seen corresponding path program 16 times [2022-01-19 02:52:16,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:52:16,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991001482] [2022-01-19 02:52:16,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:52:16,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:52:16,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:52:16,578 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:52:16,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:52:16,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991001482] [2022-01-19 02:52:16,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991001482] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:52:16,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887270568] [2022-01-19 02:52:16,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 02:52:16,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:52:16,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:52:16,579 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 02:52:16,580 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 02:52:16,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 02:52:16,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:52:16,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-19 02:52:16,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:52:16,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:52:16,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:52:17,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:52:17,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887270568] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:52:17,066 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:52:17,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 23 [2022-01-19 02:52:17,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031669090] [2022-01-19 02:52:17,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:52:17,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-19 02:52:17,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:52:17,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-19 02:52:17,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-01-19 02:52:17,068 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 02:52:17,068 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 687 places, 4777 transitions, 136291 flow. Second operand has 23 states, 23 states have (on average 53.391304347826086) internal successors, (1228), 23 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:52:17,069 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:52:17,069 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 02:52:17,069 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:52:31,595 INFO L129 PetriNetUnfolder]: 3940/10109 cut-off events. [2022-01-19 02:52:31,596 INFO L130 PetriNetUnfolder]: For 398689/398689 co-relation queries the response was YES. [2022-01-19 02:52:31,758 INFO L84 FinitePrefix]: Finished finitePrefix Result has 122816 conditions, 10109 events. 3940/10109 cut-off events. For 398689/398689 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 99288 event pairs, 94 based on Foata normal form. 61/10094 useless extension candidates. Maximal degree in co-relation 122601. Up to 4635 conditions per place. [2022-01-19 02:52:31,830 INFO L132 encePairwiseOnDemand]: 69/84 looper letters, 3748 selfloop transitions, 1454 changer transitions 1/5244 dead transitions. [2022-01-19 02:52:31,830 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 722 places, 5244 transitions, 161113 flow [2022-01-19 02:52:31,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-19 02:52:31,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-01-19 02:52:31,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1993 transitions. [2022-01-19 02:52:31,832 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6590608465608465 [2022-01-19 02:52:31,833 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1993 transitions. [2022-01-19 02:52:31,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1993 transitions. [2022-01-19 02:52:31,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:52:31,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1993 transitions. [2022-01-19 02:52:31,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 55.361111111111114) internal successors, (1993), 36 states have internal predecessors, (1993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:52:31,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 84.0) internal successors, (3108), 37 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:52:31,838 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 84.0) internal successors, (3108), 37 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:52:31,838 INFO L186 Difference]: Start difference. First operand has 687 places, 4777 transitions, 136291 flow. Second operand 36 states and 1993 transitions. [2022-01-19 02:52:31,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 722 places, 5244 transitions, 161113 flow [2022-01-19 02:52:39,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 712 places, 5244 transitions, 159070 flow, removed 943 selfloop flow, removed 10 redundant places. [2022-01-19 02:52:39,764 INFO L242 Difference]: Finished difference. Result has 737 places, 5087 transitions, 149960 flow [2022-01-19 02:52:39,767 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=134616, PETRI_DIFFERENCE_MINUEND_PLACES=677, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4775, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=149960, PETRI_PLACES=737, PETRI_TRANSITIONS=5087} [2022-01-19 02:52:39,768 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 663 predicate places. [2022-01-19 02:52:39,768 INFO L470 AbstractCegarLoop]: Abstraction has has 737 places, 5087 transitions, 149960 flow [2022-01-19 02:52:39,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.391304347826086) internal successors, (1228), 23 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:52:39,768 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:52:39,768 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 02:52:39,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-01-19 02:52:39,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:52:39,969 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:52:39,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:52:39,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1588142831, now seen corresponding path program 17 times [2022-01-19 02:52:39,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:52:39,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241776513] [2022-01-19 02:52:39,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:52:39,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:52:39,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:52:40,064 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:52:40,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:52:40,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241776513] [2022-01-19 02:52:40,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241776513] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:52:40,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830883902] [2022-01-19 02:52:40,065 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 02:52:40,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:52:40,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:52:40,066 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 02:52:40,068 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 02:52:40,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 02:52:40,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:52:40,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-19 02:52:40,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:52:40,309 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:52:40,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:52:40,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:52:40,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830883902] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:52:40,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:52:40,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-19 02:52:40,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11846716] [2022-01-19 02:52:40,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:52:40,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-19 02:52:40,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:52:40,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-19 02:52:40,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-19 02:52:40,501 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 02:52:40,502 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 737 places, 5087 transitions, 149960 flow. Second operand has 21 states, 21 states have (on average 53.476190476190474) internal successors, (1123), 21 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:52:40,502 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:52:40,502 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 02:52:40,502 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:52:58,250 INFO L129 PetriNetUnfolder]: 4407/11083 cut-off events. [2022-01-19 02:52:58,250 INFO L130 PetriNetUnfolder]: For 459168/459168 co-relation queries the response was YES. [2022-01-19 02:52:58,435 INFO L84 FinitePrefix]: Finished finitePrefix Result has 140125 conditions, 11083 events. 4407/11083 cut-off events. For 459168/459168 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 109098 event pairs, 119 based on Foata normal form. 6/11010 useless extension candidates. Maximal degree in co-relation 139886. Up to 5817 conditions per place. [2022-01-19 02:52:58,517 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 3862 selfloop transitions, 1876 changer transitions 15/5794 dead transitions. [2022-01-19 02:52:58,517 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 765 places, 5794 transitions, 182280 flow [2022-01-19 02:52:58,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-19 02:52:58,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-01-19 02:52:58,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1597 transitions. [2022-01-19 02:52:58,519 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6555829228243021 [2022-01-19 02:52:58,519 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1597 transitions. [2022-01-19 02:52:58,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1597 transitions. [2022-01-19 02:52:58,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:52:58,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1597 transitions. [2022-01-19 02:52:58,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 55.06896551724138) internal successors, (1597), 29 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:52:58,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 84.0) internal successors, (2520), 30 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:52:58,524 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 84.0) internal successors, (2520), 30 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:52:58,524 INFO L186 Difference]: Start difference. First operand has 737 places, 5087 transitions, 149960 flow. Second operand 29 states and 1597 transitions. [2022-01-19 02:52:58,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 765 places, 5794 transitions, 182280 flow [2022-01-19 02:53:07,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 758 places, 5794 transitions, 180633 flow, removed 800 selfloop flow, removed 7 redundant places. [2022-01-19 02:53:07,682 INFO L242 Difference]: Finished difference. Result has 769 places, 5617 transitions, 172264 flow [2022-01-19 02:53:07,685 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=148541, PETRI_DIFFERENCE_MINUEND_PLACES=730, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5087, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1376, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=172264, PETRI_PLACES=769, PETRI_TRANSITIONS=5617} [2022-01-19 02:53:07,686 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 695 predicate places. [2022-01-19 02:53:07,686 INFO L470 AbstractCegarLoop]: Abstraction has has 769 places, 5617 transitions, 172264 flow [2022-01-19 02:53:07,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.476190476190474) internal successors, (1123), 21 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:53:07,686 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:53:07,686 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 02:53:07,701 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 02:53:07,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-01-19 02:53:07,886 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:53:07,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:53:07,887 INFO L85 PathProgramCache]: Analyzing trace with hash 723500355, now seen corresponding path program 18 times [2022-01-19 02:53:07,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:53:07,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83229208] [2022-01-19 02:53:07,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:53:07,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:53:07,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:53:07,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:53:07,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:53:07,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83229208] [2022-01-19 02:53:07,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83229208] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:53:07,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568281770] [2022-01-19 02:53:07,966 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 02:53:07,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:53:07,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:53:07,967 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 02:53:07,967 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 02:53:08,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 02:53:08,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:53:08,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 02:53:08,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:53:08,228 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:53:08,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:53:08,423 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:53:08,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568281770] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:53:08,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:53:08,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-19 02:53:08,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387101053] [2022-01-19 02:53:08,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:53:08,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-19 02:53:08,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:53:08,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-19 02:53:08,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-19 02:53:08,424 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 02:53:08,425 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 769 places, 5617 transitions, 172264 flow. Second operand has 23 states, 23 states have (on average 53.43478260869565) internal successors, (1229), 23 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:53:08,425 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:53:08,425 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 02:53:08,425 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:53:29,867 INFO L129 PetriNetUnfolder]: 4673/11878 cut-off events. [2022-01-19 02:53:29,868 INFO L130 PetriNetUnfolder]: For 540076/540076 co-relation queries the response was YES. [2022-01-19 02:53:30,075 INFO L84 FinitePrefix]: Finished finitePrefix Result has 154462 conditions, 11878 events. 4673/11878 cut-off events. For 540076/540076 co-relation queries the response was YES. Maximal size of possible extension queue 630. Compared 119179 event pairs, 131 based on Foata normal form. 5/11794 useless extension candidates. Maximal degree in co-relation 154212. Up to 3663 conditions per place. [2022-01-19 02:53:30,163 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 2623 selfloop transitions, 3399 changer transitions 13/6076 dead transitions. [2022-01-19 02:53:30,164 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 801 places, 6076 transitions, 199520 flow [2022-01-19 02:53:30,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-19 02:53:30,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-01-19 02:53:30,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1920 transitions. [2022-01-19 02:53:30,166 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6530612244897959 [2022-01-19 02:53:30,166 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1920 transitions. [2022-01-19 02:53:30,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1920 transitions. [2022-01-19 02:53:30,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:53:30,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1920 transitions. [2022-01-19 02:53:30,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 54.857142857142854) internal successors, (1920), 35 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:53:30,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 84.0) internal successors, (3024), 36 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:53:30,172 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 84.0) internal successors, (3024), 36 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:53:30,172 INFO L186 Difference]: Start difference. First operand has 769 places, 5617 transitions, 172264 flow. Second operand 35 states and 1920 transitions. [2022-01-19 02:53:30,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 801 places, 6076 transitions, 199520 flow [2022-01-19 02:53:40,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 787 places, 6076 transitions, 198511 flow, removed 399 selfloop flow, removed 14 redundant places. [2022-01-19 02:53:40,914 INFO L242 Difference]: Finished difference. Result has 798 places, 5969 transitions, 194434 flow [2022-01-19 02:53:40,918 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=171359, PETRI_DIFFERENCE_MINUEND_PLACES=753, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3060, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=194434, PETRI_PLACES=798, PETRI_TRANSITIONS=5969} [2022-01-19 02:53:40,918 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 724 predicate places. [2022-01-19 02:53:40,918 INFO L470 AbstractCegarLoop]: Abstraction has has 798 places, 5969 transitions, 194434 flow [2022-01-19 02:53:40,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.43478260869565) internal successors, (1229), 23 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:53:40,919 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:53:40,919 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 02:53:40,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-01-19 02:53:41,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:53:41,119 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:53:41,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:53:41,120 INFO L85 PathProgramCache]: Analyzing trace with hash -319592237, now seen corresponding path program 19 times [2022-01-19 02:53:41,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:53:41,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622777416] [2022-01-19 02:53:41,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:53:41,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:53:41,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:53:41,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:53:41,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:53:41,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622777416] [2022-01-19 02:53:41,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622777416] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:53:41,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102971906] [2022-01-19 02:53:41,200 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 02:53:41,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:53:41,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:53:41,204 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 02:53:41,227 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 02:53:41,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:53:41,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-19 02:53:41,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:53:41,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:53:41,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:53:41,643 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:53:41,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102971906] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:53:41,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:53:41,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-19 02:53:41,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525741352] [2022-01-19 02:53:41,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:53:41,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-19 02:53:41,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:53:41,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-19 02:53:41,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-01-19 02:53:41,645 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 02:53:41,646 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 798 places, 5969 transitions, 194434 flow. Second operand has 21 states, 21 states have (on average 53.476190476190474) internal successors, (1123), 21 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:53:41,646 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:53:41,646 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 02:53:41,646 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:54:05,655 INFO L129 PetriNetUnfolder]: 4898/12334 cut-off events. [2022-01-19 02:54:05,655 INFO L130 PetriNetUnfolder]: For 635316/635316 co-relation queries the response was YES. [2022-01-19 02:54:05,892 INFO L84 FinitePrefix]: Finished finitePrefix Result has 168759 conditions, 12334 events. 4898/12334 cut-off events. For 635316/635316 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 124054 event pairs, 125 based on Foata normal form. 3/12250 useless extension candidates. Maximal degree in co-relation 168500. Up to 6642 conditions per place. [2022-01-19 02:54:05,993 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 4300 selfloop transitions, 2113 changer transitions 16/6470 dead transitions. [2022-01-19 02:54:05,993 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 835 places, 6470 transitions, 222673 flow [2022-01-19 02:54:05,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-19 02:54:05,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-01-19 02:54:05,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2150 transitions. [2022-01-19 02:54:05,995 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6562881562881563 [2022-01-19 02:54:05,995 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2150 transitions. [2022-01-19 02:54:05,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2150 transitions. [2022-01-19 02:54:05,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:54:05,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2150 transitions. [2022-01-19 02:54:05,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 55.12820512820513) internal successors, (2150), 39 states have internal predecessors, (2150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:54:06,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:54:06,000 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:54:06,000 INFO L186 Difference]: Start difference. First operand has 798 places, 5969 transitions, 194434 flow. Second operand 39 states and 2150 transitions. [2022-01-19 02:54:06,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 835 places, 6470 transitions, 222673 flow [2022-01-19 02:54:18,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 823 places, 6470 transitions, 218575 flow, removed 863 selfloop flow, removed 12 redundant places. [2022-01-19 02:54:18,441 INFO L242 Difference]: Finished difference. Result has 843 places, 6316 transitions, 210091 flow [2022-01-19 02:54:18,445 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=190529, PETRI_DIFFERENCE_MINUEND_PLACES=785, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5969, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1801, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4001, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=210091, PETRI_PLACES=843, PETRI_TRANSITIONS=6316} [2022-01-19 02:54:18,445 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 769 predicate places. [2022-01-19 02:54:18,446 INFO L470 AbstractCegarLoop]: Abstraction has has 843 places, 6316 transitions, 210091 flow [2022-01-19 02:54:18,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.476190476190474) internal successors, (1123), 21 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:54:18,446 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:54:18,446 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 02:54:18,467 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 02:54:18,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:54:18,659 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:54:18,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:54:18,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1183592429, now seen corresponding path program 20 times [2022-01-19 02:54:18,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:54:18,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210904717] [2022-01-19 02:54:18,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:54:18,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:54:18,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:54:18,747 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:54:18,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:54:18,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210904717] [2022-01-19 02:54:18,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210904717] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:54:18,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654194916] [2022-01-19 02:54:18,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 02:54:18,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:54:18,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:54:18,749 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 02:54:18,754 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 02:54:18,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 02:54:18,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:54:18,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 02:54:18,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:54:19,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:54:19,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:54:19,245 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:54:19,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654194916] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:54:19,245 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:54:19,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-19 02:54:19,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5844473] [2022-01-19 02:54:19,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:54:19,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-19 02:54:19,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:54:19,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-19 02:54:19,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-19 02:54:19,247 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 02:54:19,248 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 843 places, 6316 transitions, 210091 flow. Second operand has 23 states, 23 states have (on average 53.34782608695652) internal successors, (1227), 23 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:54:19,248 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:54:19,248 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 02:54:19,248 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:54:47,693 INFO L129 PetriNetUnfolder]: 5122/12927 cut-off events. [2022-01-19 02:54:47,693 INFO L130 PetriNetUnfolder]: For 692742/692742 co-relation queries the response was YES. [2022-01-19 02:54:48,065 INFO L84 FinitePrefix]: Finished finitePrefix Result has 181593 conditions, 12927 events. 5122/12927 cut-off events. For 692742/692742 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 131508 event pairs, 120 based on Foata normal form. 4/12848 useless extension candidates. Maximal degree in co-relation 181316. Up to 3956 conditions per place. [2022-01-19 02:54:48,164 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 2847 selfloop transitions, 3893 changer transitions 4/6785 dead transitions. [2022-01-19 02:54:48,164 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 881 places, 6785 transitions, 239868 flow [2022-01-19 02:54:48,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-19 02:54:48,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-01-19 02:54:48,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2137 transitions. [2022-01-19 02:54:48,166 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6523199023199023 [2022-01-19 02:54:48,166 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2137 transitions. [2022-01-19 02:54:48,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2137 transitions. [2022-01-19 02:54:48,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:54:48,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2137 transitions. [2022-01-19 02:54:48,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 54.794871794871796) internal successors, (2137), 39 states have internal predecessors, (2137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:54:48,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:54:48,172 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:54:48,172 INFO L186 Difference]: Start difference. First operand has 843 places, 6316 transitions, 210091 flow. Second operand 39 states and 2137 transitions. [2022-01-19 02:54:48,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 881 places, 6785 transitions, 239868 flow [2022-01-19 02:55:02,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 867 places, 6785 transitions, 237697 flow, removed 926 selfloop flow, removed 14 redundant places. [2022-01-19 02:55:03,018 INFO L242 Difference]: Finished difference. Result has 887 places, 6681 transitions, 233654 flow [2022-01-19 02:55:03,023 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=208054, PETRI_DIFFERENCE_MINUEND_PLACES=829, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3557, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=233654, PETRI_PLACES=887, PETRI_TRANSITIONS=6681} [2022-01-19 02:55:03,023 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 813 predicate places. [2022-01-19 02:55:03,023 INFO L470 AbstractCegarLoop]: Abstraction has has 887 places, 6681 transitions, 233654 flow [2022-01-19 02:55:03,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.34782608695652) internal successors, (1227), 23 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:55:03,024 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:55:03,024 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 02:55:03,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-19 02:55:03,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:55:03,239 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:55:03,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:55:03,240 INFO L85 PathProgramCache]: Analyzing trace with hash -2099218343, now seen corresponding path program 21 times [2022-01-19 02:55:03,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:55:03,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778258357] [2022-01-19 02:55:03,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:55:03,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:55:03,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:55:03,359 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:55:03,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:55:03,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778258357] [2022-01-19 02:55:03,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778258357] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:55:03,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196877907] [2022-01-19 02:55:03,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 02:55:03,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:55:03,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:55:03,361 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 02:55:03,362 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 02:55:03,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 02:55:03,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:55:03,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 02:55:03,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:55:03,636 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:55:03,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:55:03,863 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 02:55:03,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196877907] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:55:03,864 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:55:03,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-19 02:55:03,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250886247] [2022-01-19 02:55:03,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:55:03,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-19 02:55:03,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:55:03,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-19 02:55:03,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-19 02:55:03,865 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 02:55:03,866 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 887 places, 6681 transitions, 233654 flow. Second operand has 23 states, 23 states have (on average 53.43478260869565) internal successors, (1229), 23 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:55:03,866 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:55:03,866 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 02:55:03,866 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:55:35,958 INFO L129 PetriNetUnfolder]: 5135/13074 cut-off events. [2022-01-19 02:55:35,958 INFO L130 PetriNetUnfolder]: For 775948/775948 co-relation queries the response was YES. [2022-01-19 02:55:36,247 INFO L84 FinitePrefix]: Finished finitePrefix Result has 189143 conditions, 13074 events. 5135/13074 cut-off events. For 775948/775948 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 133925 event pairs, 32 based on Foata normal form. 13/13080 useless extension candidates. Maximal degree in co-relation 188849. Up to 4043 conditions per place. [2022-01-19 02:55:36,356 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 3466 selfloop transitions, 3295 changer transitions 7/6809 dead transitions. [2022-01-19 02:55:36,356 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 919 places, 6809 transitions, 250681 flow [2022-01-19 02:55:36,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-19 02:55:36,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-01-19 02:55:36,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1938 transitions. [2022-01-19 02:55:36,357 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6591836734693878 [2022-01-19 02:55:36,358 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1938 transitions. [2022-01-19 02:55:36,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1938 transitions. [2022-01-19 02:55:36,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:55:36,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1938 transitions. [2022-01-19 02:55:36,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 55.371428571428574) internal successors, (1938), 35 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:55:36,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 84.0) internal successors, (3024), 36 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:55:36,361 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 84.0) internal successors, (3024), 36 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:55:36,361 INFO L186 Difference]: Start difference. First operand has 887 places, 6681 transitions, 233654 flow. Second operand 35 states and 1938 transitions. [2022-01-19 02:55:36,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 919 places, 6809 transitions, 250681 flow [2022-01-19 02:55:53,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 908 places, 6809 transitions, 248282 flow, removed 1158 selfloop flow, removed 11 redundant places. [2022-01-19 02:55:53,312 INFO L242 Difference]: Finished difference. Result has 913 places, 6700 transitions, 238977 flow [2022-01-19 02:55:53,318 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=230994, PETRI_DIFFERENCE_MINUEND_PLACES=874, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=238977, PETRI_PLACES=913, PETRI_TRANSITIONS=6700} [2022-01-19 02:55:53,318 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 839 predicate places. [2022-01-19 02:55:53,318 INFO L470 AbstractCegarLoop]: Abstraction has has 913 places, 6700 transitions, 238977 flow [2022-01-19 02:55:53,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.43478260869565) internal successors, (1229), 23 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:55:53,319 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:55:53,319 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 02:55:53,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-01-19 02:55:53,527 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,SelfDestructingSolverStorable25 [2022-01-19 02:55:53,527 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:55:53,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:55:53,528 INFO L85 PathProgramCache]: Analyzing trace with hash -550960905, now seen corresponding path program 22 times [2022-01-19 02:55:53,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:55:53,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619376964] [2022-01-19 02:55:53,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:55:53,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:55:53,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:55:53,590 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 02:55:53,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:55:53,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619376964] [2022-01-19 02:55:53,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619376964] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:55:53,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388736911] [2022-01-19 02:55:53,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 02:55:53,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:55:53,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:55:53,591 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 02:55:53,595 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 02:55:53,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 02:55:53,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:55:53,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 02:55:53,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:55:53,861 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:55:53,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:55:54,063 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:55:54,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388736911] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:55:54,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:55:54,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-01-19 02:55:54,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950543753] [2022-01-19 02:55:54,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:55:54,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-19 02:55:54,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:55:54,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-19 02:55:54,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-01-19 02:55:54,065 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 02:55:54,066 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 913 places, 6700 transitions, 238977 flow. Second operand has 23 states, 23 states have (on average 53.52173913043478) internal successors, (1231), 23 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:55:54,066 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:55:54,066 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 02:55:54,066 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:56:27,518 INFO L129 PetriNetUnfolder]: 5177/13287 cut-off events. [2022-01-19 02:56:27,519 INFO L130 PetriNetUnfolder]: For 812691/812691 co-relation queries the response was YES. [2022-01-19 02:56:27,792 INFO L84 FinitePrefix]: Finished finitePrefix Result has 194351 conditions, 13287 events. 5177/13287 cut-off events. For 812691/812691 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 136614 event pairs, 35 based on Foata normal form. 14/13292 useless extension candidates. Maximal degree in co-relation 194052. Up to 3320 conditions per place. [2022-01-19 02:56:27,897 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 3101 selfloop transitions, 3835 changer transitions 7/6984 dead transitions. [2022-01-19 02:56:27,897 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 948 places, 6984 transitions, 260261 flow [2022-01-19 02:56:27,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-19 02:56:27,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-01-19 02:56:27,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2006 transitions. [2022-01-19 02:56:27,899 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6633597883597884 [2022-01-19 02:56:27,899 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2006 transitions. [2022-01-19 02:56:27,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2006 transitions. [2022-01-19 02:56:27,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:56:27,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2006 transitions. [2022-01-19 02:56:27,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 55.72222222222222) internal successors, (2006), 36 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:56:27,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 84.0) internal successors, (3108), 37 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:56:27,904 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 84.0) internal successors, (3108), 37 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:56:27,904 INFO L186 Difference]: Start difference. First operand has 913 places, 6700 transitions, 238977 flow. Second operand 36 states and 2006 transitions. [2022-01-19 02:56:27,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 948 places, 6984 transitions, 260261 flow [2022-01-19 02:56:44,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 930 places, 6984 transitions, 255316 flow, removed 160 selfloop flow, removed 18 redundant places. [2022-01-19 02:56:44,926 INFO L242 Difference]: Finished difference. Result has 933 places, 6751 transitions, 244154 flow [2022-01-19 02:56:44,929 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=233929, PETRI_DIFFERENCE_MINUEND_PLACES=895, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6693, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3777, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2884, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=244154, PETRI_PLACES=933, PETRI_TRANSITIONS=6751} [2022-01-19 02:56:44,930 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 859 predicate places. [2022-01-19 02:56:44,930 INFO L470 AbstractCegarLoop]: Abstraction has has 933 places, 6751 transitions, 244154 flow [2022-01-19 02:56:44,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.52173913043478) internal successors, (1231), 23 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:56:44,930 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:56:44,930 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 02:56:44,948 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 02:56:45,136 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,SelfDestructingSolverStorable26 [2022-01-19 02:56:45,136 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:56:45,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:56:45,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1295981185, now seen corresponding path program 23 times [2022-01-19 02:56:45,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:56:45,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319366832] [2022-01-19 02:56:45,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:56:45,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:56:45,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:56:45,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:56:45,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:56:45,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319366832] [2022-01-19 02:56:45,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319366832] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:56:45,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047385919] [2022-01-19 02:56:45,218 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 02:56:45,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:56:45,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:56:45,220 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 02:56:45,229 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 02:56:45,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 02:56:45,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:56:45,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-19 02:56:45,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:56:45,597 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:56:45,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:56:45,847 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 02:56:45,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047385919] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:56:45,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:56:45,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 14] total 28 [2022-01-19 02:56:45,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625846431] [2022-01-19 02:56:45,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:56:45,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-19 02:56:45,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:56:45,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-19 02:56:45,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2022-01-19 02:56:45,850 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 02:56:45,851 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 933 places, 6751 transitions, 244154 flow. Second operand has 28 states, 28 states have (on average 53.5) internal successors, (1498), 28 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:56:45,851 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:56:45,851 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 02:56:45,851 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:57:20,837 INFO L129 PetriNetUnfolder]: 5270/13465 cut-off events. [2022-01-19 02:57:20,837 INFO L130 PetriNetUnfolder]: For 840313/840313 co-relation queries the response was YES. [2022-01-19 02:57:21,256 INFO L84 FinitePrefix]: Finished finitePrefix Result has 202060 conditions, 13465 events. 5270/13465 cut-off events. For 840313/840313 co-relation queries the response was YES. Maximal size of possible extension queue 717. Compared 138419 event pairs, 1 based on Foata normal form. 46/13509 useless extension candidates. Maximal degree in co-relation 201759. Up to 2687 conditions per place. [2022-01-19 02:57:21,361 INFO L132 encePairwiseOnDemand]: 64/84 looper letters, 2060 selfloop transitions, 5107 changer transitions 319/7527 dead transitions. [2022-01-19 02:57:21,362 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 983 places, 7527 transitions, 287943 flow [2022-01-19 02:57:21,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-19 02:57:21,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-01-19 02:57:21,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 2815 transitions. [2022-01-19 02:57:21,364 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.644459706959707 [2022-01-19 02:57:21,364 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 2815 transitions. [2022-01-19 02:57:21,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 2815 transitions. [2022-01-19 02:57:21,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:57:21,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 2815 transitions. [2022-01-19 02:57:21,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 54.13461538461539) internal successors, (2815), 52 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:57:21,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 84.0) internal successors, (4452), 53 states have internal predecessors, (4452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:57:21,370 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 84.0) internal successors, (4452), 53 states have internal predecessors, (4452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:57:21,370 INFO L186 Difference]: Start difference. First operand has 933 places, 6751 transitions, 244154 flow. Second operand 52 states and 2815 transitions. [2022-01-19 02:57:21,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 983 places, 7527 transitions, 287943 flow [2022-01-19 02:57:38,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 961 places, 7527 transitions, 282496 flow, removed 104 selfloop flow, removed 22 redundant places. [2022-01-19 02:57:38,739 INFO L242 Difference]: Finished difference. Result has 977 places, 6983 transitions, 262280 flow [2022-01-19 02:57:38,742 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=238740, PETRI_DIFFERENCE_MINUEND_PLACES=910, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4704, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2004, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=262280, PETRI_PLACES=977, PETRI_TRANSITIONS=6983} [2022-01-19 02:57:38,742 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 903 predicate places. [2022-01-19 02:57:38,742 INFO L470 AbstractCegarLoop]: Abstraction has has 977 places, 6983 transitions, 262280 flow [2022-01-19 02:57:38,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 53.5) internal successors, (1498), 28 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:57:38,743 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:57:38,743 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 02:57:38,760 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 02:57:38,948 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,SelfDestructingSolverStorable27 [2022-01-19 02:57:38,949 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:57:38,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:57:38,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1288057161, now seen corresponding path program 24 times [2022-01-19 02:57:38,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:57:38,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288187153] [2022-01-19 02:57:38,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:57:38,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:57:38,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:57:39,019 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 02:57:39,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:57:39,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288187153] [2022-01-19 02:57:39,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288187153] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:57:39,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021888603] [2022-01-19 02:57:39,020 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 02:57:39,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:57:39,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:57:39,022 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 02:57:39,025 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 02:57:39,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 02:57:39,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:57:39,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 02:57:39,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:57:39,300 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 02:57:39,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:57:39,489 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 02:57:39,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021888603] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:57:39,489 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:57:39,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-01-19 02:57:39,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206965537] [2022-01-19 02:57:39,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:57:39,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-19 02:57:39,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:57:39,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-19 02:57:39,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-01-19 02:57:39,491 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 02:57:39,491 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 977 places, 6983 transitions, 262280 flow. Second operand has 23 states, 23 states have (on average 53.52173913043478) internal successors, (1231), 23 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:57:39,491 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:57:39,492 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 02:57:39,492 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:58:15,013 INFO L129 PetriNetUnfolder]: 5422/13094 cut-off events. [2022-01-19 02:58:15,013 INFO L130 PetriNetUnfolder]: For 895504/895504 co-relation queries the response was YES. [2022-01-19 02:58:15,299 INFO L84 FinitePrefix]: Finished finitePrefix Result has 212882 conditions, 13094 events. 5422/13094 cut-off events. For 895504/895504 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 128407 event pairs, 86 based on Foata normal form. 44/13061 useless extension candidates. Maximal degree in co-relation 212568. Up to 5691 conditions per place. [2022-01-19 02:58:15,413 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 5184 selfloop transitions, 2402 changer transitions 23/7650 dead transitions. [2022-01-19 02:58:15,413 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1014 places, 7650 transitions, 305038 flow [2022-01-19 02:58:15,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-19 02:58:15,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-01-19 02:58:15,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3176 transitions. [2022-01-19 02:58:15,416 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6518883415435139 [2022-01-19 02:58:15,416 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3176 transitions. [2022-01-19 02:58:15,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3176 transitions. [2022-01-19 02:58:15,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:58:15,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3176 transitions. [2022-01-19 02:58:15,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 54.758620689655174) internal successors, (3176), 58 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:58:15,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 84.0) internal successors, (4956), 59 states have internal predecessors, (4956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:58:15,423 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 84.0) internal successors, (4956), 59 states have internal predecessors, (4956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:58:15,423 INFO L186 Difference]: Start difference. First operand has 977 places, 6983 transitions, 262280 flow. Second operand 58 states and 3176 transitions. [2022-01-19 02:58:15,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1014 places, 7650 transitions, 305038 flow [2022-01-19 02:58:35,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 975 places, 7650 transitions, 295141 flow, removed 2456 selfloop flow, removed 39 redundant places. [2022-01-19 02:58:35,227 INFO L242 Difference]: Finished difference. Result has 1005 places, 7456 transitions, 282030 flow [2022-01-19 02:58:35,230 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=253412, PETRI_DIFFERENCE_MINUEND_PLACES=918, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6964, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1976, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4865, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=282030, PETRI_PLACES=1005, PETRI_TRANSITIONS=7456} [2022-01-19 02:58:35,231 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 931 predicate places. [2022-01-19 02:58:35,231 INFO L470 AbstractCegarLoop]: Abstraction has has 1005 places, 7456 transitions, 282030 flow [2022-01-19 02:58:35,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.52173913043478) internal successors, (1231), 23 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:58:35,231 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:58:35,232 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 02:58:35,249 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 02:58:35,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:58:35,438 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:58:35,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:58:35,439 INFO L85 PathProgramCache]: Analyzing trace with hash -783568603, now seen corresponding path program 25 times [2022-01-19 02:58:35,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:58:35,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127194768] [2022-01-19 02:58:35,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:58:35,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:58:35,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:58:35,500 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 02:58:35,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:58:35,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127194768] [2022-01-19 02:58:35,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127194768] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:58:35,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987351268] [2022-01-19 02:58:35,500 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 02:58:35,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:58:35,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:58:35,501 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 02:58:35,502 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 02:58:35,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:58:35,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 02:58:35,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:58:35,762 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:58:35,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:58:35,952 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:58:35,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987351268] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:58:35,953 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:58:35,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-01-19 02:58:35,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120702661] [2022-01-19 02:58:35,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:58:35,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-19 02:58:35,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:58:35,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-19 02:58:35,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-19 02:58:35,955 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 02:58:35,955 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1005 places, 7456 transitions, 282030 flow. Second operand has 23 states, 23 states have (on average 53.608695652173914) internal successors, (1233), 23 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:58:35,955 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:58:35,955 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 02:58:35,955 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 02:59:15,818 INFO L129 PetriNetUnfolder]: 5511/13247 cut-off events. [2022-01-19 02:59:15,818 INFO L130 PetriNetUnfolder]: For 875647/875647 co-relation queries the response was YES. [2022-01-19 02:59:16,119 INFO L84 FinitePrefix]: Finished finitePrefix Result has 215264 conditions, 13247 events. 5511/13247 cut-off events. For 875647/875647 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 129401 event pairs, 80 based on Foata normal form. 17/13192 useless extension candidates. Maximal degree in co-relation 214948. Up to 6273 conditions per place. [2022-01-19 02:59:16,241 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 5617 selfloop transitions, 2042 changer transitions 13/7713 dead transitions. [2022-01-19 02:59:16,241 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1028 places, 7713 transitions, 307437 flow [2022-01-19 02:59:16,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-19 02:59:16,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-01-19 02:59:16,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1440 transitions. [2022-01-19 02:59:16,243 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6593406593406593 [2022-01-19 02:59:16,243 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1440 transitions. [2022-01-19 02:59:16,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1440 transitions. [2022-01-19 02:59:16,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 02:59:16,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1440 transitions. [2022-01-19 02:59:16,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 55.38461538461539) internal successors, (1440), 26 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:59:16,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 84.0) internal successors, (2268), 27 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:59:16,246 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 84.0) internal successors, (2268), 27 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:59:16,246 INFO L186 Difference]: Start difference. First operand has 1005 places, 7456 transitions, 282030 flow. Second operand 26 states and 1440 transitions. [2022-01-19 02:59:16,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1028 places, 7713 transitions, 307437 flow [2022-01-19 02:59:36,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1014 places, 7713 transitions, 301536 flow, removed 1447 selfloop flow, removed 14 redundant places. [2022-01-19 02:59:36,622 INFO L242 Difference]: Finished difference. Result has 1027 places, 7608 transitions, 290776 flow [2022-01-19 02:59:36,626 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=275836, PETRI_DIFFERENCE_MINUEND_PLACES=989, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1888, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=290776, PETRI_PLACES=1027, PETRI_TRANSITIONS=7608} [2022-01-19 02:59:36,626 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 953 predicate places. [2022-01-19 02:59:36,626 INFO L470 AbstractCegarLoop]: Abstraction has has 1027 places, 7608 transitions, 290776 flow [2022-01-19 02:59:36,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.608695652173914) internal successors, (1233), 23 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:59:36,627 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 02:59:36,627 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 02:59:36,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-01-19 02:59:36,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:59:36,828 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 02:59:36,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 02:59:36,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1174987093, now seen corresponding path program 26 times [2022-01-19 02:59:36,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 02:59:36,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212954199] [2022-01-19 02:59:36,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 02:59:36,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 02:59:36,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 02:59:36,910 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 02:59:36,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 02:59:36,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212954199] [2022-01-19 02:59:36,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212954199] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 02:59:36,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625821551] [2022-01-19 02:59:36,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 02:59:36,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 02:59:36,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 02:59:36,913 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 02:59:36,913 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 02:59:36,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 02:59:36,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 02:59:36,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 02:59:36,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 02:59:37,195 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 02:59:37,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 02:59:37,379 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 02:59:37,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625821551] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 02:59:37,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 02:59:37,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-19 02:59:37,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685665066] [2022-01-19 02:59:37,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 02:59:37,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-19 02:59:37,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 02:59:37,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-19 02:59:37,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-19 02:59:37,381 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 02:59:37,382 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1027 places, 7608 transitions, 290776 flow. Second operand has 21 states, 21 states have (on average 53.476190476190474) internal successors, (1123), 21 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 02:59:37,382 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 02:59:37,382 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 02:59:37,382 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 03:00:19,580 INFO L129 PetriNetUnfolder]: 5643/13531 cut-off events. [2022-01-19 03:00:19,580 INFO L130 PetriNetUnfolder]: For 918555/918555 co-relation queries the response was YES. [2022-01-19 03:00:19,984 INFO L84 FinitePrefix]: Finished finitePrefix Result has 221008 conditions, 13531 events. 5643/13531 cut-off events. For 918555/918555 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 132180 event pairs, 22 based on Foata normal form. 10/13527 useless extension candidates. Maximal degree in co-relation 220685. Up to 5124 conditions per place. [2022-01-19 03:00:20,104 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 4869 selfloop transitions, 2970 changer transitions 17/7897 dead transitions. [2022-01-19 03:00:20,104 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1065 places, 7897 transitions, 315389 flow [2022-01-19 03:00:20,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-19 03:00:20,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-01-19 03:00:20,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2210 transitions. [2022-01-19 03:00:20,109 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6577380952380952 [2022-01-19 03:00:20,109 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2210 transitions. [2022-01-19 03:00:20,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2210 transitions. [2022-01-19 03:00:20,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 03:00:20,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2210 transitions. [2022-01-19 03:00:20,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 55.25) internal successors, (2210), 40 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 03:00:20,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 84.0) internal successors, (3444), 41 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 03:00:20,114 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 84.0) internal successors, (3444), 41 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 03:00:20,114 INFO L186 Difference]: Start difference. First operand has 1027 places, 7608 transitions, 290776 flow. Second operand 40 states and 2210 transitions. [2022-01-19 03:00:20,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1065 places, 7897 transitions, 315389 flow [2022-01-19 03:00:41,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1056 places, 7897 transitions, 314385 flow, removed 468 selfloop flow, removed 9 redundant places. [2022-01-19 03:00:41,349 INFO L242 Difference]: Finished difference. Result has 1070 places, 7780 transitions, 306881 flow [2022-01-19 03:00:41,352 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=289736, PETRI_DIFFERENCE_MINUEND_PLACES=1017, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2808, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4686, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=306881, PETRI_PLACES=1070, PETRI_TRANSITIONS=7780} [2022-01-19 03:00:41,353 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 996 predicate places. [2022-01-19 03:00:41,353 INFO L470 AbstractCegarLoop]: Abstraction has has 1070 places, 7780 transitions, 306881 flow [2022-01-19 03:00:41,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.476190476190474) internal successors, (1123), 21 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 03:00:41,353 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 03:00:41,353 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 03:00:41,369 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 03:00:41,554 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,SelfDestructingSolverStorable30 [2022-01-19 03:00:41,554 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 03:00:41,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 03:00:41,555 INFO L85 PathProgramCache]: Analyzing trace with hash 405339259, now seen corresponding path program 27 times [2022-01-19 03:00:41,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 03:00:41,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239654468] [2022-01-19 03:00:41,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 03:00:41,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 03:00:41,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 03:00:41,648 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 03:00:41,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 03:00:41,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239654468] [2022-01-19 03:00:41,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239654468] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 03:00:41,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815112611] [2022-01-19 03:00:41,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 03:00:41,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 03:00:41,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 03:00:41,650 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 03:00:41,651 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 03:00:41,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 03:00:41,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 03:00:41,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 03:00:41,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 03:00:41,971 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 03:00:41,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 03:00:42,170 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 03:00:42,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815112611] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 03:00:42,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 03:00:42,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-19 03:00:42,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948797109] [2022-01-19 03:00:42,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 03:00:42,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-19 03:00:42,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 03:00:42,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-19 03:00:42,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-19 03:00:42,172 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 03:00:42,173 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1070 places, 7780 transitions, 306881 flow. Second operand has 21 states, 21 states have (on average 53.476190476190474) internal successors, (1123), 21 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 03:00:42,173 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 03:00:42,173 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 03:00:42,173 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 03:01:29,873 INFO L129 PetriNetUnfolder]: 5968/14152 cut-off events. [2022-01-19 03:01:29,873 INFO L130 PetriNetUnfolder]: For 1090524/1090524 co-relation queries the response was YES. [2022-01-19 03:01:30,230 INFO L84 FinitePrefix]: Finished finitePrefix Result has 241764 conditions, 14152 events. 5968/14152 cut-off events. For 1090524/1090524 co-relation queries the response was YES. Maximal size of possible extension queue 670. Compared 137543 event pairs, 83 based on Foata normal form. 22/14101 useless extension candidates. Maximal degree in co-relation 241427. Up to 6392 conditions per place. [2022-01-19 03:01:30,369 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 5781 selfloop transitions, 2538 changer transitions 4/8364 dead transitions. [2022-01-19 03:01:30,370 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1115 places, 8364 transitions, 347081 flow [2022-01-19 03:01:30,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-19 03:01:30,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-01-19 03:01:30,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2588 transitions. [2022-01-19 03:01:30,372 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6555217831813577 [2022-01-19 03:01:30,372 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2588 transitions. [2022-01-19 03:01:30,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2588 transitions. [2022-01-19 03:01:30,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 03:01:30,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2588 transitions. [2022-01-19 03:01:30,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 55.06382978723404) internal successors, (2588), 47 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 03:01:30,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 84.0) internal successors, (4032), 48 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 03:01:30,378 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 84.0) internal successors, (4032), 48 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 03:01:30,379 INFO L186 Difference]: Start difference. First operand has 1070 places, 7780 transitions, 306881 flow. Second operand 47 states and 2588 transitions. [2022-01-19 03:01:30,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1115 places, 8364 transitions, 347081 flow [2022-01-19 03:01:53,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1105 places, 8364 transitions, 346145 flow, removed 163 selfloop flow, removed 10 redundant places. [2022-01-19 03:01:53,763 INFO L242 Difference]: Finished difference. Result has 1123 places, 8149 transitions, 331071 flow [2022-01-19 03:01:53,766 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=305897, PETRI_DIFFERENCE_MINUEND_PLACES=1059, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7779, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=331071, PETRI_PLACES=1123, PETRI_TRANSITIONS=8149} [2022-01-19 03:01:53,766 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 1049 predicate places. [2022-01-19 03:01:53,766 INFO L470 AbstractCegarLoop]: Abstraction has has 1123 places, 8149 transitions, 331071 flow [2022-01-19 03:01:53,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.476190476190474) internal successors, (1123), 21 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 03:01:53,766 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 03:01:53,766 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 03:01:53,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-19 03:01:53,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-01-19 03:01:53,967 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 03:01:53,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 03:01:53,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1477223204, now seen corresponding path program 28 times [2022-01-19 03:01:53,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 03:01:53,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432109140] [2022-01-19 03:01:53,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 03:01:53,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 03:01:53,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 03:01:54,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 03:01:54,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 03:01:54,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432109140] [2022-01-19 03:01:54,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432109140] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 03:01:54,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538426073] [2022-01-19 03:01:54,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 03:01:54,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 03:01:54,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 03:01:54,070 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 03:01:54,070 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 03:01:54,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 03:01:54,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 03:01:54,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-19 03:01:54,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 03:01:54,445 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 03:01:54,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 03:01:54,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 03:01:54,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538426073] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 03:01:54,766 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 03:01:54,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 13] total 31 [2022-01-19 03:01:54,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410310429] [2022-01-19 03:01:54,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 03:01:54,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-19 03:01:54,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 03:01:54,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-19 03:01:54,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2022-01-19 03:01:54,768 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 03:01:54,768 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1123 places, 8149 transitions, 331071 flow. Second operand has 31 states, 31 states have (on average 53.74193548387097) internal successors, (1666), 31 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 03:01:54,768 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 03:01:54,769 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 03:01:54,769 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 03:03:15,038 INFO L129 PetriNetUnfolder]: 8558/20630 cut-off events. [2022-01-19 03:03:15,039 INFO L130 PetriNetUnfolder]: For 1719687/1719687 co-relation queries the response was YES. [2022-01-19 03:03:15,662 INFO L84 FinitePrefix]: Finished finitePrefix Result has 357717 conditions, 20630 events. 8558/20630 cut-off events. For 1719687/1719687 co-relation queries the response was YES. Maximal size of possible extension queue 1042. Compared 216940 event pairs, 1 based on Foata normal form. 211/20840 useless extension candidates. Maximal degree in co-relation 357363. Up to 4561 conditions per place. [2022-01-19 03:03:15,848 INFO L132 encePairwiseOnDemand]: 65/84 looper letters, 771 selfloop transitions, 10816 changer transitions 495/12123 dead transitions. [2022-01-19 03:03:15,848 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1226 places, 12123 transitions, 519755 flow [2022-01-19 03:03:15,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-19 03:03:15,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2022-01-19 03:03:15,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 5653 transitions. [2022-01-19 03:03:15,852 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6470924908424909 [2022-01-19 03:03:15,852 INFO L72 ComplementDD]: Start complementDD. Operand 104 states and 5653 transitions. [2022-01-19 03:03:15,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 104 states and 5653 transitions. [2022-01-19 03:03:15,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 03:03:15,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 104 states and 5653 transitions. [2022-01-19 03:03:15,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 105 states, 104 states have (on average 54.35576923076923) internal successors, (5653), 104 states have internal predecessors, (5653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 03:03:15,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 105 states, 105 states have (on average 84.0) internal successors, (8820), 105 states have internal predecessors, (8820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 03:03:15,865 INFO L81 ComplementDD]: Finished complementDD. Result has 105 states, 105 states have (on average 84.0) internal successors, (8820), 105 states have internal predecessors, (8820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 03:03:15,865 INFO L186 Difference]: Start difference. First operand has 1123 places, 8149 transitions, 331071 flow. Second operand 104 states and 5653 transitions. [2022-01-19 03:03:15,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1226 places, 12123 transitions, 519755 flow [2022-01-19 03:03:57,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1209 places, 12123 transitions, 518912 flow, removed 198 selfloop flow, removed 17 redundant places. [2022-01-19 03:03:58,115 INFO L242 Difference]: Finished difference. Result has 1231 places, 11368 transitions, 491779 flow [2022-01-19 03:03:58,119 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=330270, PETRI_DIFFERENCE_MINUEND_PLACES=1106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7515, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=104, PETRI_FLOW=491779, PETRI_PLACES=1231, PETRI_TRANSITIONS=11368} [2022-01-19 03:03:58,120 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 1157 predicate places. [2022-01-19 03:03:58,120 INFO L470 AbstractCegarLoop]: Abstraction has has 1231 places, 11368 transitions, 491779 flow [2022-01-19 03:03:58,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 53.74193548387097) internal successors, (1666), 31 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 03:03:58,120 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 03:03:58,120 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 03:03:58,142 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 03:03:58,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 03:03:58,339 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 03:03:58,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 03:03:58,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1183265620, now seen corresponding path program 29 times [2022-01-19 03:03:58,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 03:03:58,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853158538] [2022-01-19 03:03:58,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 03:03:58,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 03:03:58,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 03:03:58,463 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 03:03:58,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 03:03:58,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853158538] [2022-01-19 03:03:58,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853158538] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 03:03:58,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391660643] [2022-01-19 03:03:58,464 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 03:03:58,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 03:03:58,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 03:03:58,465 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 03:03:58,468 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 03:03:58,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 03:03:58,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 03:03:58,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-19 03:03:58,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 03:03:58,950 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 03:03:58,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 03:03:59,281 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 03:03:59,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391660643] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 03:03:59,281 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 03:03:59,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 13] total 31 [2022-01-19 03:03:59,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499829323] [2022-01-19 03:03:59,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 03:03:59,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-19 03:03:59,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 03:03:59,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-19 03:03:59,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-01-19 03:03:59,283 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-01-19 03:03:59,283 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1231 places, 11368 transitions, 491779 flow. Second operand has 31 states, 31 states have (on average 53.774193548387096) internal successors, (1667), 31 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 03:03:59,283 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 03:03:59,284 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-01-19 03:03:59,284 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2022-01-19 03:04:30,748 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 03:04:30,748 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 03:04:30,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-19 03:04:30,815 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-01-19 03:04:30,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-19 03:04:31,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 03:04:31,016 WARN L594 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (31states, 51/84 universal loopers) in iteration 34,while PetriNetUnfolder was constructing finite prefix that currently has 72049 conditions, 3253 events (1263/3252 cut-off events. For 402511/402511 co-relation queries the response was YES. Maximal size of possible extension queue 790. Compared 32908 event pairs, 2 based on Foata normal form. 0/4042 useless extension candidates. Maximal degree in co-relation 71674. Up to 746 conditions per place.). [2022-01-19 03:04:31,018 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-19 03:04:31,018 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-19 03:04:31,028 INFO L732 BasicCegarLoop]: Path program histogram: [29, 2, 1, 1, 1] [2022-01-19 03:04:31,030 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-19 03:04:31,030 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-19 03:04:31,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.01 03:04:31 BasicIcfg [2022-01-19 03:04:31,035 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-19 03:04:31,035 INFO L158 Benchmark]: Toolchain (without parser) took 815370.52ms. Allocated memory was 346.0MB in the beginning and 7.3GB in the end (delta: 7.0GB). Free memory was 292.6MB in the beginning and 4.7GB in the end (delta: -4.4GB). Peak memory consumption was 2.5GB. Max. memory is 16.0GB. [2022-01-19 03:04:31,035 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 346.0MB. Free memory was 308.9MB in the beginning and 308.8MB in the end (delta: 80.1kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 03:04:31,036 INFO L158 Benchmark]: CACSL2BoogieTranslator took 230.40ms. Allocated memory is still 346.0MB. Free memory was 292.5MB in the beginning and 320.0MB in the end (delta: -27.5MB). Peak memory consumption was 17.1MB. Max. memory is 16.0GB. [2022-01-19 03:04:31,036 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.91ms. Allocated memory is still 346.0MB. Free memory was 320.0MB in the beginning and 318.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 03:04:31,037 INFO L158 Benchmark]: Boogie Preprocessor took 16.36ms. Allocated memory is still 346.0MB. Free memory was 318.4MB in the beginning and 317.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 03:04:31,037 INFO L158 Benchmark]: RCFGBuilder took 341.66ms. Allocated memory is still 346.0MB. Free memory was 317.2MB in the beginning and 306.2MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2022-01-19 03:04:31,037 INFO L158 Benchmark]: TraceAbstraction took 814745.24ms. Allocated memory was 346.0MB in the beginning and 7.3GB in the end (delta: 7.0GB). Free memory was 305.7MB in the beginning and 4.7GB in the end (delta: -4.4GB). Peak memory consumption was 2.6GB. Max. memory is 16.0GB. [2022-01-19 03:04:31,038 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 346.0MB. Free memory was 308.9MB in the beginning and 308.8MB in the end (delta: 80.1kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 230.40ms. Allocated memory is still 346.0MB. Free memory was 292.5MB in the beginning and 320.0MB in the end (delta: -27.5MB). Peak memory consumption was 17.1MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 28.91ms. Allocated memory is still 346.0MB. Free memory was 320.0MB in the beginning and 318.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 16.36ms. Allocated memory is still 346.0MB. Free memory was 318.4MB in the beginning and 317.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 341.66ms. Allocated memory is still 346.0MB. Free memory was 317.2MB in the beginning and 306.2MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * TraceAbstraction took 814745.24ms. Allocated memory was 346.0MB in the beginning and 7.3GB in the end (delta: 7.0GB). Free memory was 305.7MB in the beginning and 4.7GB in the end (delta: -4.4GB). Peak memory consumption was 2.6GB. 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: 70]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (31states, 51/84 universal loopers) in iteration 34,while PetriNetUnfolder was constructing finite prefix that currently has 72049 conditions, 3253 events (1263/3252 cut-off events. For 402511/402511 co-relation queries the response was YES. Maximal size of possible extension queue 790. Compared 32908 event pairs, 2 based on Foata normal form. 0/4042 useless extension candidates. Maximal degree in co-relation 71674. Up to 746 conditions per place.). - TimeoutResultAtElement [Line: 64]: 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 (31states, 51/84 universal loopers) in iteration 34,while PetriNetUnfolder was constructing finite prefix that currently has 72049 conditions, 3253 events (1263/3252 cut-off events. For 402511/402511 co-relation queries the response was YES. Maximal size of possible extension queue 790. Compared 32908 event pairs, 2 based on Foata normal form. 0/4042 useless extension candidates. Maximal degree in co-relation 71674. Up to 746 conditions per place.). - TimeoutResultAtElement [Line: 65]: 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 (31states, 51/84 universal loopers) in iteration 34,while PetriNetUnfolder was constructing finite prefix that currently has 72049 conditions, 3253 events (1263/3252 cut-off events. For 402511/402511 co-relation queries the response was YES. Maximal size of possible extension queue 790. Compared 32908 event pairs, 2 based on Foata normal form. 0/4042 useless extension candidates. Maximal degree in co-relation 71674. Up to 746 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 95 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: 814.6s, OverallIterations: 34, TraceHistogramMax: 2, PathProgramHistogramMax: 29, EmptinessCheckTime: 0.0s, AutomataDifference: 789.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5759 SdHoareTripleChecker+Valid, 8.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5759 mSDsluCounter, 6033 SdHoareTripleChecker+Invalid, 6.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 7535 mSDsCounter, 1826 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 19010 IncrementalHoareTripleChecker+Invalid, 20836 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1826 mSolverCounterUnsat, 839 mSDtfsCounter, 19010 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5173 GetRequests, 3537 SyntacticMatches, 40 SemanticMatches, 1596 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27264 ImplicationChecksByTransitivity, 20.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=491779occurred in iteration=33, InterpolantAutomatonStates: 1169, 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: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 16.5s InterpolantComputationTime, 4290 NumberOfCodeBlocks, 4268 NumberOfCodeBlocksAsserted, 95 NumberOfCheckSat, 6024 ConstructedInterpolants, 0 QuantifiedInterpolants, 22393 SizeOfPredicates, 265 NumberOfNonLiveVariables, 4298 ConjunctsInSsa, 408 ConjunctsInUnsatCore, 88 InterpolantComputations, 9 PerfectInterpolantSequences, 224/482 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