/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-Before.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 08:55:23,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 08:55:23,942 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 08:55:24,001 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 08:55:24,002 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 08:55:24,004 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 08:55:24,006 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 08:55:24,011 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 08:55:24,012 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 08:55:24,016 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 08:55:24,017 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 08:55:24,018 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 08:55:24,018 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 08:55:24,019 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 08:55:24,020 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 08:55:24,023 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 08:55:24,024 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 08:55:24,024 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 08:55:24,026 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 08:55:24,029 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 08:55:24,030 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 08:55:24,032 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 08:55:24,033 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 08:55:24,033 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 08:55:24,036 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 08:55:24,036 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 08:55:24,036 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 08:55:24,037 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 08:55:24,038 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 08:55:24,038 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 08:55:24,038 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 08:55:24,039 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 08:55:24,040 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 08:55:24,040 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 08:55:24,041 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 08:55:24,041 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 08:55:24,042 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 08:55:24,042 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 08:55:24,042 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 08:55:24,042 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 08:55:24,043 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 08:55:24,044 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-Before.epf [2022-01-19 08:55:24,071 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 08:55:24,071 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 08:55:24,072 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 08:55:24,072 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 08:55:24,072 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 08:55:24,072 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 08:55:24,072 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 08:55:24,072 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 08:55:24,073 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 08:55:24,073 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 08:55:24,073 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 08:55:24,073 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 08:55:24,073 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 08:55:24,074 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 08:55:24,074 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 08:55:24,074 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 08:55:24,074 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 08:55:24,074 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 08:55:24,074 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 08:55:24,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 08:55:24,074 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 08:55:24,074 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 08:55:24,074 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 08:55:24,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 08:55:24,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 08:55:24,075 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 08:55:24,075 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 08:55:24,076 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 08:55:24,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 08:55:24,076 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 08:55:24,076 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 08:55:24,076 INFO L138 SettingsManager]: * When to check the insufficient erros location relative to the other error locations=BEFORE [2022-01-19 08:55:24,076 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 08:55:24,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 08:55:24,308 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 08:55:24,309 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 08:55:24,310 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 08:55:24,310 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 08:55:24,311 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2022-01-19 08:55:24,353 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb0fcb4c8/919adfe3835c4ec7b54aaca58c3b223a/FLAGb202cd57d [2022-01-19 08:55:24,691 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 08:55:24,691 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2022-01-19 08:55:24,695 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb0fcb4c8/919adfe3835c4ec7b54aaca58c3b223a/FLAGb202cd57d [2022-01-19 08:55:25,110 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb0fcb4c8/919adfe3835c4ec7b54aaca58c3b223a [2022-01-19 08:55:25,112 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 08:55:25,113 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 08:55:25,114 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 08:55:25,114 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 08:55:25,115 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 08:55:25,116 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 08:55:25" (1/1) ... [2022-01-19 08:55:25,117 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56614153 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:55:25, skipping insertion in model container [2022-01-19 08:55:25,117 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 08:55:25" (1/1) ... [2022-01-19 08:55:25,121 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 08:55:25,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 08:55:25,346 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c[2696,2709] [2022-01-19 08:55:25,358 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 08:55:25,364 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 08:55:25,391 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c[2696,2709] [2022-01-19 08:55:25,398 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 08:55:25,407 INFO L208 MainTranslator]: Completed translation [2022-01-19 08:55:25,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:55:25 WrapperNode [2022-01-19 08:55:25,407 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 08:55:25,408 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 08:55:25,408 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 08:55:25,408 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 08:55:25,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:55:25" (1/1) ... [2022-01-19 08:55:25,427 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:55:25" (1/1) ... [2022-01-19 08:55:25,450 INFO L137 Inliner]: procedures = 24, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 154 [2022-01-19 08:55:25,450 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 08:55:25,451 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 08:55:25,451 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 08:55:25,451 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 08:55:25,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:55:25" (1/1) ... [2022-01-19 08:55:25,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:55:25" (1/1) ... [2022-01-19 08:55:25,468 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:55:25" (1/1) ... [2022-01-19 08:55:25,468 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:55:25" (1/1) ... [2022-01-19 08:55:25,477 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:55:25" (1/1) ... [2022-01-19 08:55:25,480 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:55:25" (1/1) ... [2022-01-19 08:55:25,481 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:55:25" (1/1) ... [2022-01-19 08:55:25,482 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 08:55:25,483 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 08:55:25,483 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 08:55:25,483 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 08:55:25,488 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:55:25" (1/1) ... [2022-01-19 08:55:25,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 08:55:25,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:55:25,545 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-19 08:55:25,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-19 08:55:25,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 08:55:25,653 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-19 08:55:25,653 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-19 08:55:25,653 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-19 08:55:25,653 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-19 08:55:25,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 08:55:25,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 08:55:25,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 08:55:25,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-19 08:55:25,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-19 08:55:25,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-19 08:55:25,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 08:55:25,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 08:55:25,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 08:55:25,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 08:55:25,656 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-19 08:55:25,770 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 08:55:25,771 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 08:55:26,002 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 08:55:26,111 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 08:55:26,112 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-19 08:55:26,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 08:55:26 BoogieIcfgContainer [2022-01-19 08:55:26,118 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 08:55:26,119 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 08:55:26,119 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 08:55:26,131 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 08:55:26,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 08:55:25" (1/3) ... [2022-01-19 08:55:26,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@752e4a31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 08:55:26, skipping insertion in model container [2022-01-19 08:55:26,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:55:25" (2/3) ... [2022-01-19 08:55:26,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@752e4a31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 08:55:26, skipping insertion in model container [2022-01-19 08:55:26,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 08:55:26" (3/3) ... [2022-01-19 08:55:26,133 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2022-01-19 08:55:26,136 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 08:55:26,136 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 08:55:26,136 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 08:55:26,158 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,158 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,159 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,159 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,159 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,159 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,159 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,160 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,160 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,160 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,160 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,160 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,160 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,160 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,161 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,161 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,161 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,161 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,162 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,162 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,162 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,162 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,163 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,163 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,163 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,163 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,163 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,163 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,163 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,163 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,164 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,164 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,164 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,164 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,164 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,164 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,164 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,165 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,165 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,165 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,165 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,165 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,165 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,165 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,165 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,166 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,166 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,166 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,166 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,166 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,166 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,166 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,167 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,167 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,167 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,167 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,167 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,168 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,169 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,169 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,169 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,169 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,170 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,170 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,170 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,170 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,170 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,171 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,171 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,171 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,171 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,171 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,171 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,171 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,171 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:55:26,174 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-19 08:55:26,201 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 08:55:26,205 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-19 08:55:26,205 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-19 08:55:26,217 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 132 places, 136 transitions, 288 flow [2022-01-19 08:55:26,274 INFO L129 PetriNetUnfolder]: 11/134 cut-off events. [2022-01-19 08:55:26,274 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 08:55:26,278 INFO L84 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 134 events. 11/134 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 68 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 99. Up to 3 conditions per place. [2022-01-19 08:55:26,278 INFO L82 GeneralOperation]: Start removeDead. Operand has 132 places, 136 transitions, 288 flow [2022-01-19 08:55:26,283 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 125 transitions, 262 flow [2022-01-19 08:55:26,318 INFO L129 PetriNetUnfolder]: 11/124 cut-off events. [2022-01-19 08:55:26,318 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 08:55:26,319 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:55:26,319 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:55:26,320 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:55:26,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:55:26,327 INFO L85 PathProgramCache]: Analyzing trace with hash 321786498, now seen corresponding path program 1 times [2022-01-19 08:55:26,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:55:26,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652908357] [2022-01-19 08:55:26,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:55:26,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:55:26,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:55:26,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:55:26,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:55:26,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652908357] [2022-01-19 08:55:26,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652908357] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:55:26,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:55:26,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-19 08:55:26,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114611709] [2022-01-19 08:55:26,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:55:26,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-19 08:55:26,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:55:26,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-19 08:55:26,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-19 08:55:26,542 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 136 [2022-01-19 08:55:26,546 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 125 transitions, 262 flow. Second operand has 2 states, 2 states have (on average 123.5) internal successors, (247), 2 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:26,547 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:55:26,547 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 136 [2022-01-19 08:55:26,547 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:55:26,593 INFO L129 PetriNetUnfolder]: 12/147 cut-off events. [2022-01-19 08:55:26,594 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-01-19 08:55:26,594 INFO L84 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 147 events. 12/147 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 172 event pairs, 5 based on Foata normal form. 14/150 useless extension candidates. Maximal degree in co-relation 97. Up to 22 conditions per place. [2022-01-19 08:55:26,596 INFO L132 encePairwiseOnDemand]: 128/136 looper letters, 7 selfloop transitions, 0 changer transitions 4/117 dead transitions. [2022-01-19 08:55:26,596 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 117 transitions, 260 flow [2022-01-19 08:55:26,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-19 08:55:26,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-01-19 08:55:26,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 255 transitions. [2022-01-19 08:55:26,607 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9375 [2022-01-19 08:55:26,607 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 255 transitions. [2022-01-19 08:55:26,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 255 transitions. [2022-01-19 08:55:26,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:55:26,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 255 transitions. [2022-01-19 08:55:26,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 127.5) internal successors, (255), 2 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:26,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:26,620 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:26,621 INFO L186 Difference]: Start difference. First operand has 121 places, 125 transitions, 262 flow. Second operand 2 states and 255 transitions. [2022-01-19 08:55:26,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 117 transitions, 260 flow [2022-01-19 08:55:26,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 117 transitions, 252 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 08:55:26,628 INFO L242 Difference]: Finished difference. Result has 118 places, 113 transitions, 230 flow [2022-01-19 08:55:26,630 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=230, PETRI_PLACES=118, PETRI_TRANSITIONS=113} [2022-01-19 08:55:26,633 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, -3 predicate places. [2022-01-19 08:55:26,633 INFO L470 AbstractCegarLoop]: Abstraction has has 118 places, 113 transitions, 230 flow [2022-01-19 08:55:26,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 123.5) internal successors, (247), 2 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:26,634 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:55:26,634 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:55:26,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 08:55:26,634 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:55:26,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:55:26,635 INFO L85 PathProgramCache]: Analyzing trace with hash -632914253, now seen corresponding path program 1 times [2022-01-19 08:55:26,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:55:26,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065948512] [2022-01-19 08:55:26,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:55:26,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:55:26,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:55:26,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:55:26,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:55:26,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065948512] [2022-01-19 08:55:26,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065948512] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:55:26,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:55:26,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 08:55:26,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726367421] [2022-01-19 08:55:26,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:55:26,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 08:55:26,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:55:26,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 08:55:26,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-19 08:55:26,839 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 136 [2022-01-19 08:55:26,839 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 113 transitions, 230 flow. Second operand has 6 states, 6 states have (on average 108.66666666666667) internal successors, (652), 6 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:26,839 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:55:26,840 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 136 [2022-01-19 08:55:26,840 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:55:26,943 INFO L129 PetriNetUnfolder]: 12/179 cut-off events. [2022-01-19 08:55:26,943 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-01-19 08:55:26,944 INFO L84 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 179 events. 12/179 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 250 event pairs, 5 based on Foata normal form. 5/175 useless extension candidates. Maximal degree in co-relation 227. Up to 31 conditions per place. [2022-01-19 08:55:26,945 INFO L132 encePairwiseOnDemand]: 126/136 looper letters, 19 selfloop transitions, 6 changer transitions 3/120 dead transitions. [2022-01-19 08:55:26,945 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 120 transitions, 302 flow [2022-01-19 08:55:26,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-19 08:55:26,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-01-19 08:55:26,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 773 transitions. [2022-01-19 08:55:26,949 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8119747899159664 [2022-01-19 08:55:26,949 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 773 transitions. [2022-01-19 08:55:26,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 773 transitions. [2022-01-19 08:55:26,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:55:26,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 773 transitions. [2022-01-19 08:55:26,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 110.42857142857143) internal successors, (773), 7 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:26,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 136.0) internal successors, (1088), 8 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:26,954 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 136.0) internal successors, (1088), 8 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:26,954 INFO L186 Difference]: Start difference. First operand has 118 places, 113 transitions, 230 flow. Second operand 7 states and 773 transitions. [2022-01-19 08:55:26,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 120 transitions, 302 flow [2022-01-19 08:55:26,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 120 transitions, 302 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 08:55:26,958 INFO L242 Difference]: Finished difference. Result has 122 places, 114 transitions, 256 flow [2022-01-19 08:55:26,958 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=256, PETRI_PLACES=122, PETRI_TRANSITIONS=114} [2022-01-19 08:55:26,959 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 1 predicate places. [2022-01-19 08:55:26,959 INFO L470 AbstractCegarLoop]: Abstraction has has 122 places, 114 transitions, 256 flow [2022-01-19 08:55:26,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 108.66666666666667) internal successors, (652), 6 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:26,960 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:55:26,960 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:55:26,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 08:55:26,960 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:55:26,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:55:26,961 INFO L85 PathProgramCache]: Analyzing trace with hash 853527032, now seen corresponding path program 1 times [2022-01-19 08:55:26,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:55:26,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966891680] [2022-01-19 08:55:26,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:55:26,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:55:26,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:55:27,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 08:55:27,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:55:27,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966891680] [2022-01-19 08:55:27,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966891680] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:55:27,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:55:27,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 08:55:27,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589727015] [2022-01-19 08:55:27,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:55:27,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 08:55:27,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:55:27,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 08:55:27,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 08:55:27,033 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 136 [2022-01-19 08:55:27,033 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 114 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:27,033 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:55:27,033 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 136 [2022-01-19 08:55:27,033 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:55:27,069 INFO L129 PetriNetUnfolder]: 13/156 cut-off events. [2022-01-19 08:55:27,070 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-01-19 08:55:27,070 INFO L84 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 156 events. 13/156 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 162 event pairs, 1 based on Foata normal form. 1/151 useless extension candidates. Maximal degree in co-relation 208. Up to 23 conditions per place. [2022-01-19 08:55:27,070 INFO L132 encePairwiseOnDemand]: 132/136 looper letters, 11 selfloop transitions, 3 changer transitions 0/117 dead transitions. [2022-01-19 08:55:27,070 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 117 transitions, 295 flow [2022-01-19 08:55:27,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 08:55:27,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 08:55:27,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2022-01-19 08:55:27,071 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8897058823529411 [2022-01-19 08:55:27,071 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 363 transitions. [2022-01-19 08:55:27,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 363 transitions. [2022-01-19 08:55:27,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:55:27,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 363 transitions. [2022-01-19 08:55:27,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:27,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:27,073 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:27,073 INFO L186 Difference]: Start difference. First operand has 122 places, 114 transitions, 256 flow. Second operand 3 states and 363 transitions. [2022-01-19 08:55:27,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 117 transitions, 295 flow [2022-01-19 08:55:27,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 117 transitions, 285 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 08:55:27,080 INFO L242 Difference]: Finished difference. Result has 120 places, 116 transitions, 269 flow [2022-01-19 08:55:27,080 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=269, PETRI_PLACES=120, PETRI_TRANSITIONS=116} [2022-01-19 08:55:27,081 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, -1 predicate places. [2022-01-19 08:55:27,081 INFO L470 AbstractCegarLoop]: Abstraction has has 120 places, 116 transitions, 269 flow [2022-01-19 08:55:27,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:27,081 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:55:27,081 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:55:27,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-19 08:55:27,082 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:55:27,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:55:27,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1991812262, now seen corresponding path program 2 times [2022-01-19 08:55:27,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:55:27,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578731602] [2022-01-19 08:55:27,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:55:27,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:55:27,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:55:27,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 08:55:27,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:55:27,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578731602] [2022-01-19 08:55:27,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578731602] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:55:27,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:55:27,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-19 08:55:27,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905944006] [2022-01-19 08:55:27,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:55:27,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-19 08:55:27,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:55:27,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-19 08:55:27,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-01-19 08:55:27,359 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 136 [2022-01-19 08:55:27,360 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 116 transitions, 269 flow. Second operand has 12 states, 12 states have (on average 90.5) internal successors, (1086), 12 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:27,361 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:55:27,361 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 136 [2022-01-19 08:55:27,361 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:55:27,570 INFO L129 PetriNetUnfolder]: 82/335 cut-off events. [2022-01-19 08:55:27,570 INFO L130 PetriNetUnfolder]: For 103/103 co-relation queries the response was YES. [2022-01-19 08:55:27,571 INFO L84 FinitePrefix]: Finished finitePrefix Result has 644 conditions, 335 events. 82/335 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1209 event pairs, 20 based on Foata normal form. 1/312 useless extension candidates. Maximal degree in co-relation 637. Up to 73 conditions per place. [2022-01-19 08:55:27,572 INFO L132 encePairwiseOnDemand]: 121/136 looper letters, 49 selfloop transitions, 13 changer transitions 6/147 dead transitions. [2022-01-19 08:55:27,572 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 147 transitions, 498 flow [2022-01-19 08:55:27,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-19 08:55:27,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-01-19 08:55:27,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1213 transitions. [2022-01-19 08:55:27,584 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6860859728506787 [2022-01-19 08:55:27,584 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1213 transitions. [2022-01-19 08:55:27,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1213 transitions. [2022-01-19 08:55:27,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:55:27,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1213 transitions. [2022-01-19 08:55:27,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 93.3076923076923) internal successors, (1213), 13 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:27,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 136.0) internal successors, (1904), 14 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:27,605 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 136.0) internal successors, (1904), 14 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:27,605 INFO L186 Difference]: Start difference. First operand has 120 places, 116 transitions, 269 flow. Second operand 13 states and 1213 transitions. [2022-01-19 08:55:27,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 147 transitions, 498 flow [2022-01-19 08:55:27,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 147 transitions, 473 flow, removed 11 selfloop flow, removed 2 redundant places. [2022-01-19 08:55:27,609 INFO L242 Difference]: Finished difference. Result has 135 places, 122 transitions, 318 flow [2022-01-19 08:55:27,610 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=318, PETRI_PLACES=135, PETRI_TRANSITIONS=122} [2022-01-19 08:55:27,610 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 14 predicate places. [2022-01-19 08:55:27,611 INFO L470 AbstractCegarLoop]: Abstraction has has 135 places, 122 transitions, 318 flow [2022-01-19 08:55:27,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 90.5) internal successors, (1086), 12 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:27,611 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:55:27,611 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:55:27,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-19 08:55:27,612 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:55:27,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:55:27,612 INFO L85 PathProgramCache]: Analyzing trace with hash -199541928, now seen corresponding path program 1 times [2022-01-19 08:55:27,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:55:27,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397970816] [2022-01-19 08:55:27,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:55:27,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:55:27,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:55:27,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:55:27,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:55:27,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397970816] [2022-01-19 08:55:27,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397970816] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:55:27,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088672441] [2022-01-19 08:55:27,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:55:27,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:55:27,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:55:27,832 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:55:27,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-19 08:55:27,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:55:27,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:55:27,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:55:28,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 08:55:28,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-19 08:55:28,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088672441] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:55:28,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-19 08:55:28,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 12 [2022-01-19 08:55:28,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961558836] [2022-01-19 08:55:28,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:55:28,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-19 08:55:28,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:55:28,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-19 08:55:28,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-01-19 08:55:28,179 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 136 [2022-01-19 08:55:28,180 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 122 transitions, 318 flow. Second operand has 4 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:28,180 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:55:28,180 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 136 [2022-01-19 08:55:28,180 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:55:28,233 INFO L129 PetriNetUnfolder]: 26/275 cut-off events. [2022-01-19 08:55:28,234 INFO L130 PetriNetUnfolder]: For 82/93 co-relation queries the response was YES. [2022-01-19 08:55:28,235 INFO L84 FinitePrefix]: Finished finitePrefix Result has 453 conditions, 275 events. 26/275 cut-off events. For 82/93 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 828 event pairs, 2 based on Foata normal form. 6/277 useless extension candidates. Maximal degree in co-relation 442. Up to 37 conditions per place. [2022-01-19 08:55:28,235 INFO L132 encePairwiseOnDemand]: 132/136 looper letters, 16 selfloop transitions, 7 changer transitions 3/132 dead transitions. [2022-01-19 08:55:28,235 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 132 transitions, 399 flow [2022-01-19 08:55:28,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-19 08:55:28,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-01-19 08:55:28,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 487 transitions. [2022-01-19 08:55:28,237 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8952205882352942 [2022-01-19 08:55:28,237 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 487 transitions. [2022-01-19 08:55:28,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 487 transitions. [2022-01-19 08:55:28,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:55:28,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 487 transitions. [2022-01-19 08:55:28,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:28,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:28,240 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:28,240 INFO L186 Difference]: Start difference. First operand has 135 places, 122 transitions, 318 flow. Second operand 4 states and 487 transitions. [2022-01-19 08:55:28,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 132 transitions, 399 flow [2022-01-19 08:55:28,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 132 transitions, 383 flow, removed 3 selfloop flow, removed 7 redundant places. [2022-01-19 08:55:28,244 INFO L242 Difference]: Finished difference. Result has 130 places, 123 transitions, 336 flow [2022-01-19 08:55:28,244 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=336, PETRI_PLACES=130, PETRI_TRANSITIONS=123} [2022-01-19 08:55:28,246 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 9 predicate places. [2022-01-19 08:55:28,246 INFO L470 AbstractCegarLoop]: Abstraction has has 130 places, 123 transitions, 336 flow [2022-01-19 08:55:28,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:28,246 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:55:28,246 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:55:28,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-19 08:55:28,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:55:28,463 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:55:28,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:55:28,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1155105201, now seen corresponding path program 1 times [2022-01-19 08:55:28,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:55:28,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449107141] [2022-01-19 08:55:28,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:55:28,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:55:28,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:55:28,548 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 08:55:28,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:55:28,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449107141] [2022-01-19 08:55:28,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449107141] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:55:28,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687868656] [2022-01-19 08:55:28,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:55:28,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:55:28,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:55:28,557 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:55:28,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-19 08:55:28,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:55:28,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 08:55:28,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:55:28,861 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 08:55:28,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:55:29,135 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 08:55:29,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687868656] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:55:29,136 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:55:29,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 08:55:29,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098580908] [2022-01-19 08:55:29,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:55:29,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 08:55:29,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:55:29,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 08:55:29,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-01-19 08:55:29,139 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 136 [2022-01-19 08:55:29,141 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 123 transitions, 336 flow. Second operand has 19 states, 19 states have (on average 105.63157894736842) internal successors, (2007), 19 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:29,141 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:55:29,141 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 136 [2022-01-19 08:55:29,141 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:55:29,310 INFO L129 PetriNetUnfolder]: 26/315 cut-off events. [2022-01-19 08:55:29,310 INFO L130 PetriNetUnfolder]: For 212/255 co-relation queries the response was YES. [2022-01-19 08:55:29,310 INFO L84 FinitePrefix]: Finished finitePrefix Result has 579 conditions, 315 events. 26/315 cut-off events. For 212/255 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 926 event pairs, 6 based on Foata normal form. 7/318 useless extension candidates. Maximal degree in co-relation 568. Up to 54 conditions per place. [2022-01-19 08:55:29,311 INFO L132 encePairwiseOnDemand]: 124/136 looper letters, 28 selfloop transitions, 11 changer transitions 6/137 dead transitions. [2022-01-19 08:55:29,311 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 137 transitions, 475 flow [2022-01-19 08:55:29,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-19 08:55:29,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-01-19 08:55:29,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1277 transitions. [2022-01-19 08:55:29,314 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7824754901960784 [2022-01-19 08:55:29,314 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1277 transitions. [2022-01-19 08:55:29,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1277 transitions. [2022-01-19 08:55:29,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:55:29,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1277 transitions. [2022-01-19 08:55:29,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 106.41666666666667) internal successors, (1277), 12 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:29,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 136.0) internal successors, (1768), 13 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:29,318 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 136.0) internal successors, (1768), 13 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:29,318 INFO L186 Difference]: Start difference. First operand has 130 places, 123 transitions, 336 flow. Second operand 12 states and 1277 transitions. [2022-01-19 08:55:29,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 137 transitions, 475 flow [2022-01-19 08:55:29,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 137 transitions, 459 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-01-19 08:55:29,321 INFO L242 Difference]: Finished difference. Result has 144 places, 127 transitions, 385 flow [2022-01-19 08:55:29,321 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=385, PETRI_PLACES=144, PETRI_TRANSITIONS=127} [2022-01-19 08:55:29,321 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 23 predicate places. [2022-01-19 08:55:29,322 INFO L470 AbstractCegarLoop]: Abstraction has has 144 places, 127 transitions, 385 flow [2022-01-19 08:55:29,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 105.63157894736842) internal successors, (2007), 19 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:29,322 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:55:29,323 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:55:29,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-19 08:55:29,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-01-19 08:55:29,536 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:55:29,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:55:29,536 INFO L85 PathProgramCache]: Analyzing trace with hash -477337818, now seen corresponding path program 2 times [2022-01-19 08:55:29,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:55:29,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282479347] [2022-01-19 08:55:29,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:55:29,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:55:29,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:55:30,197 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:55:30,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:55:30,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282479347] [2022-01-19 08:55:30,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282479347] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:55:30,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603000989] [2022-01-19 08:55:30,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:55:30,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:55:30,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:55:30,212 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:55:30,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-19 08:55:30,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:55:30,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:55:30,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-19 08:55:30,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:55:30,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-19 08:55:30,943 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:55:30,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:55:31,111 INFO L353 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-01-19 08:55:31,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2022-01-19 08:55:32,320 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:55:32,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603000989] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:55:32,320 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:55:32,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14, 14] total 45 [2022-01-19 08:55:32,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438121605] [2022-01-19 08:55:32,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:55:32,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-19 08:55:32,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:55:32,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-19 08:55:32,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=1657, Unknown=0, NotChecked=0, Total=1980 [2022-01-19 08:55:32,324 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 136 [2022-01-19 08:55:32,326 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 127 transitions, 385 flow. Second operand has 45 states, 45 states have (on average 67.4888888888889) internal successors, (3037), 45 states have internal predecessors, (3037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:32,327 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:55:32,327 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 136 [2022-01-19 08:55:32,327 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:55:34,822 INFO L129 PetriNetUnfolder]: 750/2362 cut-off events. [2022-01-19 08:55:34,822 INFO L130 PetriNetUnfolder]: For 2354/2454 co-relation queries the response was YES. [2022-01-19 08:55:34,828 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5643 conditions, 2362 events. 750/2362 cut-off events. For 2354/2454 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 18401 event pairs, 112 based on Foata normal form. 36/2308 useless extension candidates. Maximal degree in co-relation 5626. Up to 401 conditions per place. [2022-01-19 08:55:34,835 INFO L132 encePairwiseOnDemand]: 108/136 looper letters, 198 selfloop transitions, 76 changer transitions 0/329 dead transitions. [2022-01-19 08:55:34,835 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 329 transitions, 1794 flow [2022-01-19 08:55:34,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-19 08:55:34,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-01-19 08:55:34,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2928 transitions. [2022-01-19 08:55:34,841 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5126050420168067 [2022-01-19 08:55:34,841 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2928 transitions. [2022-01-19 08:55:34,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2928 transitions. [2022-01-19 08:55:34,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:55:34,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2928 transitions. [2022-01-19 08:55:34,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 69.71428571428571) internal successors, (2928), 42 states have internal predecessors, (2928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:34,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 136.0) internal successors, (5848), 43 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:34,853 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 136.0) internal successors, (5848), 43 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:34,853 INFO L186 Difference]: Start difference. First operand has 144 places, 127 transitions, 385 flow. Second operand 42 states and 2928 transitions. [2022-01-19 08:55:34,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 329 transitions, 1794 flow [2022-01-19 08:55:34,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 329 transitions, 1723 flow, removed 31 selfloop flow, removed 6 redundant places. [2022-01-19 08:55:34,861 INFO L242 Difference]: Finished difference. Result has 200 places, 191 transitions, 1073 flow [2022-01-19 08:55:34,862 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1073, PETRI_PLACES=200, PETRI_TRANSITIONS=191} [2022-01-19 08:55:34,862 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 79 predicate places. [2022-01-19 08:55:34,862 INFO L470 AbstractCegarLoop]: Abstraction has has 200 places, 191 transitions, 1073 flow [2022-01-19 08:55:34,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 67.4888888888889) internal successors, (3037), 45 states have internal predecessors, (3037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:34,863 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:55:34,864 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:55:34,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-19 08:55:35,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:55:35,081 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:55:35,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:55:35,082 INFO L85 PathProgramCache]: Analyzing trace with hash 2090966660, now seen corresponding path program 3 times [2022-01-19 08:55:35,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:55:35,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856795352] [2022-01-19 08:55:35,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:55:35,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:55:35,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:55:35,974 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:55:35,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:55:35,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856795352] [2022-01-19 08:55:35,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856795352] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:55:35,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564843191] [2022-01-19 08:55:35,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 08:55:35,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:55:35,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:55:35,976 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:55:35,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-19 08:55:36,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 08:55:36,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:55:36,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-19 08:55:36,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:55:36,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 08:55:36,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-19 08:55:36,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-19 08:55:36,601 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 08:55:36,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:55:36,672 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_149 (Array Int Int))) (not (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_149) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))))) is different from false [2022-01-19 08:55:36,699 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:55:36,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 45 [2022-01-19 08:55:36,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-19 08:55:37,063 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 08:55:37,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564843191] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:55:37,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:55:37,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 12, 12] total 45 [2022-01-19 08:55:37,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113212066] [2022-01-19 08:55:37,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:55:37,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-19 08:55:37,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:55:37,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-19 08:55:37,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1774, Unknown=1, NotChecked=84, Total=1980 [2022-01-19 08:55:37,067 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 136 [2022-01-19 08:55:37,069 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 191 transitions, 1073 flow. Second operand has 45 states, 45 states have (on average 58.48888888888889) internal successors, (2632), 45 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:37,069 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:55:37,069 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 136 [2022-01-19 08:55:37,069 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:55:41,365 INFO L129 PetriNetUnfolder]: 957/2920 cut-off events. [2022-01-19 08:55:41,366 INFO L130 PetriNetUnfolder]: For 15494/15830 co-relation queries the response was YES. [2022-01-19 08:55:41,376 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9788 conditions, 2920 events. 957/2920 cut-off events. For 15494/15830 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 23632 event pairs, 76 based on Foata normal form. 182/3042 useless extension candidates. Maximal degree in co-relation 9750. Up to 541 conditions per place. [2022-01-19 08:55:41,385 INFO L132 encePairwiseOnDemand]: 110/136 looper letters, 186 selfloop transitions, 117 changer transitions 0/352 dead transitions. [2022-01-19 08:55:41,385 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 352 transitions, 2854 flow [2022-01-19 08:55:41,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-19 08:55:41,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-01-19 08:55:41,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2635 transitions. [2022-01-19 08:55:41,390 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2022-01-19 08:55:41,390 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2635 transitions. [2022-01-19 08:55:41,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2635 transitions. [2022-01-19 08:55:41,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:55:41,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2635 transitions. [2022-01-19 08:55:41,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 59.88636363636363) internal successors, (2635), 44 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:41,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 136.0) internal successors, (6120), 45 states have internal predecessors, (6120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:41,400 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 136.0) internal successors, (6120), 45 states have internal predecessors, (6120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:41,400 INFO L186 Difference]: Start difference. First operand has 200 places, 191 transitions, 1073 flow. Second operand 44 states and 2635 transitions. [2022-01-19 08:55:41,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 352 transitions, 2854 flow [2022-01-19 08:55:41,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 352 transitions, 2700 flow, removed 60 selfloop flow, removed 15 redundant places. [2022-01-19 08:55:41,419 INFO L242 Difference]: Finished difference. Result has 237 places, 236 transitions, 1751 flow [2022-01-19 08:55:41,420 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=971, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=1751, PETRI_PLACES=237, PETRI_TRANSITIONS=236} [2022-01-19 08:55:41,420 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 116 predicate places. [2022-01-19 08:55:41,420 INFO L470 AbstractCegarLoop]: Abstraction has has 237 places, 236 transitions, 1751 flow [2022-01-19 08:55:41,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 58.48888888888889) internal successors, (2632), 45 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:41,421 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:55:41,421 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:55:41,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-19 08:55:41,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:55:41,656 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:55:41,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:55:41,656 INFO L85 PathProgramCache]: Analyzing trace with hash 176551504, now seen corresponding path program 1 times [2022-01-19 08:55:41,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:55:41,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108622702] [2022-01-19 08:55:41,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:55:41,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:55:41,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:55:42,827 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:55:42,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:55:42,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108622702] [2022-01-19 08:55:42,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108622702] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:55:42,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938446699] [2022-01-19 08:55:42,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:55:42,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:55:42,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:55:42,829 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:55:42,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-19 08:55:42,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:55:42,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 60 conjunts are in the unsatisfiable core [2022-01-19 08:55:42,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:55:42,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-19 08:55:43,158 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 08:55:43,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-01-19 08:55:43,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-19 08:55:44,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-19 08:55:44,516 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:55:44,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:55:45,099 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:55:45,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 95 [2022-01-19 08:55:45,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 49 [2022-01-19 08:55:47,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-19 08:55:47,229 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:55:47,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938446699] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:55:47,230 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:55:47,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 85 [2022-01-19 08:55:47,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82787216] [2022-01-19 08:55:47,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:55:47,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-19 08:55:47,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:55:47,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-19 08:55:47,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=6623, Unknown=2, NotChecked=0, Total=7140 [2022-01-19 08:55:47,234 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 136 [2022-01-19 08:55:47,237 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 236 transitions, 1751 flow. Second operand has 85 states, 85 states have (on average 49.37647058823529) internal successors, (4197), 85 states have internal predecessors, (4197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:55:47,237 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:55:47,237 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 136 [2022-01-19 08:55:47,237 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:56:01,389 INFO L129 PetriNetUnfolder]: 5750/11340 cut-off events. [2022-01-19 08:56:01,389 INFO L130 PetriNetUnfolder]: For 68850/68859 co-relation queries the response was YES. [2022-01-19 08:56:01,459 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43797 conditions, 11340 events. 5750/11340 cut-off events. For 68850/68859 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 96386 event pairs, 367 based on Foata normal form. 13/11322 useless extension candidates. Maximal degree in co-relation 43750. Up to 2470 conditions per place. [2022-01-19 08:56:01,508 INFO L132 encePairwiseOnDemand]: 99/136 looper letters, 618 selfloop transitions, 351 changer transitions 46/1055 dead transitions. [2022-01-19 08:56:01,508 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 1055 transitions, 9624 flow [2022-01-19 08:56:01,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-19 08:56:01,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2022-01-19 08:56:01,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 6341 transitions. [2022-01-19 08:56:01,516 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3853305785123967 [2022-01-19 08:56:01,517 INFO L72 ComplementDD]: Start complementDD. Operand 121 states and 6341 transitions. [2022-01-19 08:56:01,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 121 states and 6341 transitions. [2022-01-19 08:56:01,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:56:01,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 121 states and 6341 transitions. [2022-01-19 08:56:01,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 122 states, 121 states have (on average 52.40495867768595) internal successors, (6341), 121 states have internal predecessors, (6341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:56:01,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 122 states, 122 states have (on average 136.0) internal successors, (16592), 122 states have internal predecessors, (16592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:56:01,540 INFO L81 ComplementDD]: Finished complementDD. Result has 122 states, 122 states have (on average 136.0) internal successors, (16592), 122 states have internal predecessors, (16592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:56:01,540 INFO L186 Difference]: Start difference. First operand has 237 places, 236 transitions, 1751 flow. Second operand 121 states and 6341 transitions. [2022-01-19 08:56:01,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 1055 transitions, 9624 flow [2022-01-19 08:56:01,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 1055 transitions, 9436 flow, removed 62 selfloop flow, removed 29 redundant places. [2022-01-19 08:56:01,711 INFO L242 Difference]: Finished difference. Result has 370 places, 535 transitions, 5321 flow [2022-01-19 08:56:01,712 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=1651, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=121, PETRI_FLOW=5321, PETRI_PLACES=370, PETRI_TRANSITIONS=535} [2022-01-19 08:56:01,712 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 249 predicate places. [2022-01-19 08:56:01,712 INFO L470 AbstractCegarLoop]: Abstraction has has 370 places, 535 transitions, 5321 flow [2022-01-19 08:56:01,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 49.37647058823529) internal successors, (4197), 85 states have internal predecessors, (4197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:56:01,714 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:56:01,714 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:56:01,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-19 08:56:01,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:56:01,930 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:56:01,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:56:01,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1651370038, now seen corresponding path program 2 times [2022-01-19 08:56:01,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:56:01,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180899575] [2022-01-19 08:56:01,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:56:01,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:56:01,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:56:02,910 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:56:02,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:56:02,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180899575] [2022-01-19 08:56:02,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180899575] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:56:02,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089989840] [2022-01-19 08:56:02,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:56:02,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:56:02,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:56:02,913 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:56:02,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-19 08:56:03,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:56:03,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:56:03,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 62 conjunts are in the unsatisfiable core [2022-01-19 08:56:03,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:56:04,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 08:56:04,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-19 08:56:04,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-19 08:56:04,492 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:56:04,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:56:05,212 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:56:05,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 95 [2022-01-19 08:56:05,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 49 [2022-01-19 08:56:06,846 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:56:06,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089989840] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:56:06,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:56:06,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 32, 32] total 87 [2022-01-19 08:56:06,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412380910] [2022-01-19 08:56:06,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:56:06,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-19 08:56:06,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:56:06,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-19 08:56:06,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=6886, Unknown=5, NotChecked=0, Total=7482 [2022-01-19 08:56:06,851 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 136 [2022-01-19 08:56:06,854 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 535 transitions, 5321 flow. Second operand has 87 states, 87 states have (on average 48.37931034482759) internal successors, (4209), 87 states have internal predecessors, (4209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:56:06,854 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:56:06,854 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 136 [2022-01-19 08:56:06,854 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:56:26,686 INFO L129 PetriNetUnfolder]: 8600/18069 cut-off events. [2022-01-19 08:56:26,686 INFO L130 PetriNetUnfolder]: For 219267/219293 co-relation queries the response was YES. [2022-01-19 08:56:26,793 INFO L84 FinitePrefix]: Finished finitePrefix Result has 96583 conditions, 18069 events. 8600/18069 cut-off events. For 219267/219293 co-relation queries the response was YES. Maximal size of possible extension queue 965. Compared 177779 event pairs, 198 based on Foata normal form. 359/18394 useless extension candidates. Maximal degree in co-relation 96499. Up to 2824 conditions per place. [2022-01-19 08:56:26,845 INFO L132 encePairwiseOnDemand]: 97/136 looper letters, 699 selfloop transitions, 817 changer transitions 374/1929 dead transitions. [2022-01-19 08:56:26,845 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 1929 transitions, 23309 flow [2022-01-19 08:56:26,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2022-01-19 08:56:26,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2022-01-19 08:56:26,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 9729 transitions. [2022-01-19 08:56:26,937 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3805147058823529 [2022-01-19 08:56:26,937 INFO L72 ComplementDD]: Start complementDD. Operand 188 states and 9729 transitions. [2022-01-19 08:56:26,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 188 states and 9729 transitions. [2022-01-19 08:56:26,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:56:26,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 188 states and 9729 transitions. [2022-01-19 08:56:26,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 189 states, 188 states have (on average 51.75) internal successors, (9729), 188 states have internal predecessors, (9729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:56:26,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 189 states, 189 states have (on average 136.0) internal successors, (25704), 189 states have internal predecessors, (25704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:56:26,989 INFO L81 ComplementDD]: Finished complementDD. Result has 189 states, 189 states have (on average 136.0) internal successors, (25704), 189 states have internal predecessors, (25704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:56:26,989 INFO L186 Difference]: Start difference. First operand has 370 places, 535 transitions, 5321 flow. Second operand 188 states and 9729 transitions. [2022-01-19 08:56:26,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 1929 transitions, 23309 flow [2022-01-19 08:56:27,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 1929 transitions, 22746 flow, removed 237 selfloop flow, removed 34 redundant places. [2022-01-19 08:56:27,953 INFO L242 Difference]: Finished difference. Result has 579 places, 1022 transitions, 14126 flow [2022-01-19 08:56:27,954 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=4202, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=270, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=188, PETRI_FLOW=14126, PETRI_PLACES=579, PETRI_TRANSITIONS=1022} [2022-01-19 08:56:27,954 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 458 predicate places. [2022-01-19 08:56:27,954 INFO L470 AbstractCegarLoop]: Abstraction has has 579 places, 1022 transitions, 14126 flow [2022-01-19 08:56:27,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 48.37931034482759) internal successors, (4209), 87 states have internal predecessors, (4209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:56:27,955 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:56:27,956 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:56:27,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-19 08:56:28,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:56:28,172 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:56:28,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:56:28,172 INFO L85 PathProgramCache]: Analyzing trace with hash -887718634, now seen corresponding path program 3 times [2022-01-19 08:56:28,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:56:28,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531843024] [2022-01-19 08:56:28,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:56:28,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:56:28,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:56:29,756 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:56:29,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:56:29,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531843024] [2022-01-19 08:56:29,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531843024] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:56:29,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415629868] [2022-01-19 08:56:29,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 08:56:29,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:56:29,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:56:29,758 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:56:29,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-19 08:56:29,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 08:56:29,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:56:29,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-19 08:56:29,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:56:29,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-19 08:56:30,023 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 08:56:30,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-01-19 08:56:30,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-19 08:56:30,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-19 08:56:30,849 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 08:56:30,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:56:31,344 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:56:31,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 95 [2022-01-19 08:56:31,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 49 [2022-01-19 08:56:32,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-19 08:56:32,188 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 08:56:32,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415629868] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:56:32,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:56:32,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 23, 23] total 67 [2022-01-19 08:56:32,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101390456] [2022-01-19 08:56:32,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:56:32,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-19 08:56:32,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:56:32,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-19 08:56:32,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=4192, Unknown=3, NotChecked=0, Total=4422 [2022-01-19 08:56:32,194 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 136 [2022-01-19 08:56:32,196 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 579 places, 1022 transitions, 14126 flow. Second operand has 67 states, 67 states have (on average 47.67164179104478) internal successors, (3194), 67 states have internal predecessors, (3194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:56:32,196 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:56:32,196 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 136 [2022-01-19 08:56:32,196 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:56:51,859 INFO L129 PetriNetUnfolder]: 8204/16873 cut-off events. [2022-01-19 08:56:51,859 INFO L130 PetriNetUnfolder]: For 390935/390961 co-relation queries the response was YES. [2022-01-19 08:56:52,031 INFO L84 FinitePrefix]: Finished finitePrefix Result has 117203 conditions, 16873 events. 8204/16873 cut-off events. For 390935/390961 co-relation queries the response was YES. Maximal size of possible extension queue 945. Compared 161983 event pairs, 542 based on Foata normal form. 26/16846 useless extension candidates. Maximal degree in co-relation 117054. Up to 4003 conditions per place. [2022-01-19 08:56:52,232 INFO L132 encePairwiseOnDemand]: 98/136 looper letters, 725 selfloop transitions, 802 changer transitions 133/1699 dead transitions. [2022-01-19 08:56:52,232 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 654 places, 1699 transitions, 26532 flow [2022-01-19 08:56:52,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-19 08:56:52,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2022-01-19 08:56:52,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 5908 transitions. [2022-01-19 08:56:52,237 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3681455633100698 [2022-01-19 08:56:52,237 INFO L72 ComplementDD]: Start complementDD. Operand 118 states and 5908 transitions. [2022-01-19 08:56:52,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 118 states and 5908 transitions. [2022-01-19 08:56:52,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:56:52,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 118 states and 5908 transitions. [2022-01-19 08:56:52,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 119 states, 118 states have (on average 50.067796610169495) internal successors, (5908), 118 states have internal predecessors, (5908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:56:52,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 119 states, 119 states have (on average 136.0) internal successors, (16184), 119 states have internal predecessors, (16184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:56:52,256 INFO L81 ComplementDD]: Finished complementDD. Result has 119 states, 119 states have (on average 136.0) internal successors, (16184), 119 states have internal predecessors, (16184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:56:52,256 INFO L186 Difference]: Start difference. First operand has 579 places, 1022 transitions, 14126 flow. Second operand 118 states and 5908 transitions. [2022-01-19 08:56:52,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 654 places, 1699 transitions, 26532 flow [2022-01-19 08:56:54,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 566 places, 1699 transitions, 24223 flow, removed 1029 selfloop flow, removed 88 redundant places. [2022-01-19 08:56:54,923 INFO L242 Difference]: Finished difference. Result has 605 places, 1197 transitions, 17531 flow [2022-01-19 08:56:54,924 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=12710, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1022, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=618, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=118, PETRI_FLOW=17531, PETRI_PLACES=605, PETRI_TRANSITIONS=1197} [2022-01-19 08:56:54,924 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 484 predicate places. [2022-01-19 08:56:54,924 INFO L470 AbstractCegarLoop]: Abstraction has has 605 places, 1197 transitions, 17531 flow [2022-01-19 08:56:54,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 47.67164179104478) internal successors, (3194), 67 states have internal predecessors, (3194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:56:54,925 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:56:54,925 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:56:54,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-19 08:56:55,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:56:55,141 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:56:55,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:56:55,141 INFO L85 PathProgramCache]: Analyzing trace with hash 722440850, now seen corresponding path program 4 times [2022-01-19 08:56:55,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:56:55,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882119979] [2022-01-19 08:56:55,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:56:55,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:56:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:56:56,204 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:56:56,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:56:56,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882119979] [2022-01-19 08:56:56,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882119979] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:56:56,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996704145] [2022-01-19 08:56:56,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 08:56:56,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:56:56,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:56:56,206 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:56:56,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-19 08:56:56,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 08:56:56,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:56:56,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 62 conjunts are in the unsatisfiable core [2022-01-19 08:56:56,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:56:56,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-19 08:56:56,558 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 08:56:56,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-01-19 08:56:57,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-19 08:56:57,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2022-01-19 08:56:58,024 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:56:58,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:56:58,338 WARN L838 $PredicateComparison]: unable to prove that (or (not (<= 0 c_~q_back~0)) (not (< c_~q_back~0 c_~n~0)) (< |c_thread1Thread1of1ForFork1_~i~0#1| c_~N~0) (and (forall ((v_ArrVal_268 (Array Int Int))) (<= (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_268) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))) c_~N~0)) (forall ((v_ArrVal_268 (Array Int Int))) (<= c_~N~0 (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_268) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))))))) is different from false [2022-01-19 08:56:58,404 WARN L838 $PredicateComparison]: unable to prove that (or (not (<= 0 c_~q_back~0)) (not (< c_~q_back~0 c_~n~0)) (< (+ |c_thread1Thread1of1ForFork1_#t~post1#1| 1) c_~N~0) (and (forall ((v_ArrVal_268 (Array Int Int))) (<= (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_268) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))) c_~N~0)) (forall ((v_ArrVal_268 (Array Int Int))) (<= c_~N~0 (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_268) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))))))) is different from false [2022-01-19 08:56:58,416 WARN L838 $PredicateComparison]: unable to prove that (or (not (<= 0 c_~q_back~0)) (not (< c_~q_back~0 c_~n~0)) (< (+ |c_thread1Thread1of1ForFork1_~i~0#1| 1) c_~N~0) (and (forall ((v_ArrVal_268 (Array Int Int))) (<= (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_268) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))) c_~N~0)) (forall ((v_ArrVal_268 (Array Int Int))) (<= c_~N~0 (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_268) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))))))) is different from false [2022-01-19 08:56:58,431 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:56:58,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 74 [2022-01-19 08:56:58,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2022-01-19 08:56:58,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-01-19 08:57:00,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-19 08:57:00,231 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:57:00,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996704145] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:57:00,231 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:57:00,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31, 31] total 83 [2022-01-19 08:57:00,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481702117] [2022-01-19 08:57:00,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:57:00,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-19 08:57:00,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:57:00,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-19 08:57:00,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=508, Invalid=5821, Unknown=3, NotChecked=474, Total=6806 [2022-01-19 08:57:00,235 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 136 [2022-01-19 08:57:00,237 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 605 places, 1197 transitions, 17531 flow. Second operand has 83 states, 83 states have (on average 49.40963855421687) internal successors, (4101), 83 states have internal predecessors, (4101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:57:00,237 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:57:00,237 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 136 [2022-01-19 08:57:00,237 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:57:20,367 INFO L129 PetriNetUnfolder]: 10095/20595 cut-off events. [2022-01-19 08:57:20,367 INFO L130 PetriNetUnfolder]: For 595031/595051 co-relation queries the response was YES. [2022-01-19 08:57:20,781 INFO L84 FinitePrefix]: Finished finitePrefix Result has 157805 conditions, 20595 events. 10095/20595 cut-off events. For 595031/595051 co-relation queries the response was YES. Maximal size of possible extension queue 1108. Compared 201402 event pairs, 858 based on Foata normal form. 152/20678 useless extension candidates. Maximal degree in co-relation 157659. Up to 6099 conditions per place. [2022-01-19 08:57:20,885 INFO L132 encePairwiseOnDemand]: 96/136 looper letters, 974 selfloop transitions, 1039 changer transitions 151/2204 dead transitions. [2022-01-19 08:57:20,885 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 698 places, 2204 transitions, 37256 flow [2022-01-19 08:57:20,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-19 08:57:20,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2022-01-19 08:57:20,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 6291 transitions. [2022-01-19 08:57:20,892 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.388717251606525 [2022-01-19 08:57:20,892 INFO L72 ComplementDD]: Start complementDD. Operand 119 states and 6291 transitions. [2022-01-19 08:57:20,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 119 states and 6291 transitions. [2022-01-19 08:57:20,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:57:20,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 119 states and 6291 transitions. [2022-01-19 08:57:20,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 120 states, 119 states have (on average 52.865546218487395) internal successors, (6291), 119 states have internal predecessors, (6291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:57:20,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 120 states, 120 states have (on average 136.0) internal successors, (16320), 120 states have internal predecessors, (16320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:57:20,909 INFO L81 ComplementDD]: Finished complementDD. Result has 120 states, 120 states have (on average 136.0) internal successors, (16320), 120 states have internal predecessors, (16320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:57:20,909 INFO L186 Difference]: Start difference. First operand has 605 places, 1197 transitions, 17531 flow. Second operand 119 states and 6291 transitions. [2022-01-19 08:57:20,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 698 places, 2204 transitions, 37256 flow [2022-01-19 08:57:24,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 633 places, 2204 transitions, 36078 flow, removed 490 selfloop flow, removed 65 redundant places. [2022-01-19 08:57:25,038 INFO L242 Difference]: Finished difference. Result has 688 places, 1618 transitions, 28211 flow [2022-01-19 08:57:25,039 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=16131, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=646, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=119, PETRI_FLOW=28211, PETRI_PLACES=688, PETRI_TRANSITIONS=1618} [2022-01-19 08:57:25,040 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 567 predicate places. [2022-01-19 08:57:25,040 INFO L470 AbstractCegarLoop]: Abstraction has has 688 places, 1618 transitions, 28211 flow [2022-01-19 08:57:25,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 49.40963855421687) internal successors, (4101), 83 states have internal predecessors, (4101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:57:25,040 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:57:25,041 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:57:25,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-19 08:57:25,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-19 08:57:25,255 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:57:25,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:57:25,256 INFO L85 PathProgramCache]: Analyzing trace with hash -810837532, now seen corresponding path program 5 times [2022-01-19 08:57:25,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:57:25,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895771336] [2022-01-19 08:57:25,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:57:25,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:57:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:57:26,440 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:57:26,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:57:26,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895771336] [2022-01-19 08:57:26,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895771336] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:57:26,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127648124] [2022-01-19 08:57:26,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 08:57:26,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:57:26,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:57:26,442 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:57:26,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-19 08:57:26,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 08:57:26,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:57:26,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 56 conjunts are in the unsatisfiable core [2022-01-19 08:57:26,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:57:27,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 08:57:27,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-19 08:57:27,785 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:57:27,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2022-01-19 08:57:28,245 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:57:28,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:57:28,929 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:57:28,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 95 [2022-01-19 08:57:28,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 49 [2022-01-19 08:57:30,543 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:57:30,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127648124] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:57:30,543 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:57:30,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 32, 32] total 88 [2022-01-19 08:57:30,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400681688] [2022-01-19 08:57:30,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:57:30,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-19 08:57:30,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:57:30,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-19 08:57:30,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=472, Invalid=7183, Unknown=1, NotChecked=0, Total=7656 [2022-01-19 08:57:30,547 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 136 [2022-01-19 08:57:30,549 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 688 places, 1618 transitions, 28211 flow. Second operand has 88 states, 88 states have (on average 48.35227272727273) internal successors, (4255), 88 states have internal predecessors, (4255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:57:30,549 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:57:30,549 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 136 [2022-01-19 08:57:30,549 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:57:51,775 INFO L129 PetriNetUnfolder]: 11661/23872 cut-off events. [2022-01-19 08:57:51,775 INFO L130 PetriNetUnfolder]: For 920830/920946 co-relation queries the response was YES. [2022-01-19 08:57:52,249 INFO L84 FinitePrefix]: Finished finitePrefix Result has 224510 conditions, 23872 events. 11661/23872 cut-off events. For 920830/920946 co-relation queries the response was YES. Maximal size of possible extension queue 1289. Compared 239302 event pairs, 1872 based on Foata normal form. 16/23822 useless extension candidates. Maximal degree in co-relation 224329. Up to 8625 conditions per place. [2022-01-19 08:57:52,361 INFO L132 encePairwiseOnDemand]: 91/136 looper letters, 658 selfloop transitions, 2012 changer transitions 61/2770 dead transitions. [2022-01-19 08:57:52,361 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 771 places, 2770 transitions, 55700 flow [2022-01-19 08:57:52,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-19 08:57:52,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2022-01-19 08:57:52,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 5311 transitions. [2022-01-19 08:57:52,366 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3684100998890122 [2022-01-19 08:57:52,366 INFO L72 ComplementDD]: Start complementDD. Operand 106 states and 5311 transitions. [2022-01-19 08:57:52,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 5311 transitions. [2022-01-19 08:57:52,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:57:52,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 106 states and 5311 transitions. [2022-01-19 08:57:52,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 107 states, 106 states have (on average 50.10377358490566) internal successors, (5311), 106 states have internal predecessors, (5311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:57:52,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 107 states, 107 states have (on average 136.0) internal successors, (14552), 107 states have internal predecessors, (14552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:57:52,379 INFO L81 ComplementDD]: Finished complementDD. Result has 107 states, 107 states have (on average 136.0) internal successors, (14552), 107 states have internal predecessors, (14552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:57:52,379 INFO L186 Difference]: Start difference. First operand has 688 places, 1618 transitions, 28211 flow. Second operand 106 states and 5311 transitions. [2022-01-19 08:57:52,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 771 places, 2770 transitions, 55700 flow [2022-01-19 08:57:59,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 708 places, 2770 transitions, 53593 flow, removed 938 selfloop flow, removed 63 redundant places. [2022-01-19 08:57:59,472 INFO L242 Difference]: Finished difference. Result has 735 places, 2553 transitions, 53641 flow [2022-01-19 08:57:59,473 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=26944, PETRI_DIFFERENCE_MINUEND_PLACES=603, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=106, PETRI_FLOW=53641, PETRI_PLACES=735, PETRI_TRANSITIONS=2553} [2022-01-19 08:57:59,474 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 614 predicate places. [2022-01-19 08:57:59,474 INFO L470 AbstractCegarLoop]: Abstraction has has 735 places, 2553 transitions, 53641 flow [2022-01-19 08:57:59,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 48.35227272727273) internal successors, (4255), 88 states have internal predecessors, (4255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:57:59,474 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:57:59,474 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:57:59,494 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 08:57:59,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-19 08:57:59,692 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:57:59,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:57:59,692 INFO L85 PathProgramCache]: Analyzing trace with hash -2002121420, now seen corresponding path program 6 times [2022-01-19 08:57:59,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:57:59,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469506508] [2022-01-19 08:57:59,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:57:59,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:57:59,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:58:00,430 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:58:00,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:58:00,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469506508] [2022-01-19 08:58:00,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469506508] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:58:00,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929979114] [2022-01-19 08:58:00,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 08:58:00,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:58:00,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:58:00,431 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 08:58:00,432 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 08:58:00,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 08:58:00,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:58:00,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-19 08:58:00,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:58:01,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 08:58:01,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-19 08:58:01,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-19 08:58:01,918 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:58:01,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:58:02,339 WARN L838 $PredicateComparison]: unable to prove that (or (not (<= 0 c_~q_back~0)) (not (< c_~q_back~0 c_~n~0)) (< (+ |c_thread1Thread1of1ForFork1_#t~post1#1| 1) c_~N~0) (and (forall ((v_ArrVal_326 (Array Int Int))) (<= c_~N~0 (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_326) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))))) (forall ((v_ArrVal_326 (Array Int Int))) (<= (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_326) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))) c_~N~0)))) is different from false [2022-01-19 08:58:02,356 WARN L838 $PredicateComparison]: unable to prove that (or (not (<= 0 c_~q_back~0)) (not (< c_~q_back~0 c_~n~0)) (< (+ |c_thread1Thread1of1ForFork1_~i~0#1| 1) c_~N~0) (and (forall ((v_ArrVal_326 (Array Int Int))) (<= c_~N~0 (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_326) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))))) (forall ((v_ArrVal_326 (Array Int Int))) (<= (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_326) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))) c_~N~0)))) is different from false [2022-01-19 08:58:02,429 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:58:02,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 74 [2022-01-19 08:58:02,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2022-01-19 08:58:02,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-01-19 08:58:03,850 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:58:03,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929979114] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:58:03,851 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:58:03,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31, 31] total 84 [2022-01-19 08:58:03,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939947905] [2022-01-19 08:58:03,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:58:03,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-19 08:58:03,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:58:03,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-19 08:58:03,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=520, Invalid=6128, Unknown=2, NotChecked=322, Total=6972 [2022-01-19 08:58:03,854 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 136 [2022-01-19 08:58:03,856 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 735 places, 2553 transitions, 53641 flow. Second operand has 84 states, 84 states have (on average 48.464285714285715) internal successors, (4071), 84 states have internal predecessors, (4071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:58:03,856 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:58:03,856 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 136 [2022-01-19 08:58:03,856 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:58:10,133 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse14 (* c_~q_front~0 4))) (let ((.cse15 (+ c_~s~0 1)) (.cse18 (+ c_~N~0 |c_thread2Thread1of1ForFork0_~j~0#1|)) (.cse19 (* 4 c_~q_back~0)) (.cse16 (+ |c_thread1Thread1of1ForFork1_~i~0#1| 1)) (.cse13 (+ .cse14 c_~q~0.offset))) (let ((.cse2 (<= 0 c_~q_front~0)) (.cse7 (= (select (select |c_#memory_int| c_~q~0.base) .cse13) 1)) (.cse4 (not (= |c_ULTIMATE.start_main_~#t2~0#1.base| c_~q~0.base))) (.cse10 (<= .cse16 c_~N~0)) (.cse11 (= |c_thread1Thread1of1ForFork1_~i~0#1| 0)) (.cse1 (<= .cse13 0)) (.cse3 (<= 1 c_~N~0)) (.cse5 (= c_~s~0 0)) (.cse6 (= |c_thread1Thread1of1ForFork1_#t~post1#1| 0)) (.cse12 (+ c_~q~0.offset .cse19)) (.cse17 (<= c_~n~0 2)) (.cse8 (<= .cse15 .cse18)) (.cse9 (= |c_thread2Thread1of1ForFork0_~j~0#1| 1)) (.cse0 (<= (* c_~n~0 4) (+ c_~q~0.offset 3 .cse19)))) (and (<= |c_thread1Thread1of1ForFork1_~i~0#1| 1) (or .cse0 (and .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7)) (or .cse0 (and (<= |c_thread2Thread1of1ForFork0_~j~0#1| c_~s~0) .cse8 .cse9 .cse6)) (or (and .cse1 .cse2 .cse4 .cse5 .cse10 .cse11 .cse7) .cse0) (= c_~s~0 1) (or (not (= .cse12 0)) (and (or (and .cse4 .cse5 .cse10 .cse11) (not (= .cse13 0))) (or .cse1 (<= (+ c_~q_front~0 c_~n~0) (+ 2 c_~q_back~0))) (< 0 (+ .cse14 c_~q~0.offset 1)))) (or (not (= |c_thread2Thread1of1ForFork0_~j~0#1| 0)) (and (<= c_~N~0 c_~s~0) (<= c_~s~0 c_~N~0))) (or (and .cse3 .cse5 .cse9 .cse6) .cse0) (or (and (<= (+ |c_thread1Thread1of1ForFork1_~i~0#1| |c_thread2Thread1of1ForFork0_~j~0#1|) .cse15) .cse8 .cse9) .cse0) (or (not (<= 0 c_~q_back~0)) (not (< c_~q_back~0 c_~n~0)) (< .cse16 c_~N~0) (and (forall ((v_ArrVal_326 (Array Int Int))) (<= c_~N~0 (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_326) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))))) (forall ((v_ArrVal_326 (Array Int Int))) (<= (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_326) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))) c_~N~0)))) (or (<= .cse12 0) .cse17) (< 0 c_~N~0) (< 0 c_~n~0) (= c_~q~0.offset 0) (<= 1 c_~q_back~0) .cse17 (or (and .cse8 .cse9 (<= .cse18 .cse15)) .cse0))))) is different from false [2022-01-19 08:58:34,496 INFO L129 PetriNetUnfolder]: 15449/31226 cut-off events. [2022-01-19 08:58:34,496 INFO L130 PetriNetUnfolder]: For 1602386/1602516 co-relation queries the response was YES. [2022-01-19 08:58:35,044 INFO L84 FinitePrefix]: Finished finitePrefix Result has 343026 conditions, 31226 events. 15449/31226 cut-off events. For 1602386/1602516 co-relation queries the response was YES. Maximal size of possible extension queue 1565. Compared 323165 event pairs, 704 based on Foata normal form. 55/31209 useless extension candidates. Maximal degree in co-relation 342834. Up to 6811 conditions per place. [2022-01-19 08:58:35,212 INFO L132 encePairwiseOnDemand]: 96/136 looper letters, 1244 selfloop transitions, 2649 changer transitions 175/4107 dead transitions. [2022-01-19 08:58:35,212 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 862 places, 4107 transitions, 96969 flow [2022-01-19 08:58:35,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-01-19 08:58:35,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2022-01-19 08:58:35,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 7259 transitions. [2022-01-19 08:58:35,217 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.37588028169014087 [2022-01-19 08:58:35,218 INFO L72 ComplementDD]: Start complementDD. Operand 142 states and 7259 transitions. [2022-01-19 08:58:35,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 142 states and 7259 transitions. [2022-01-19 08:58:35,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:58:35,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 142 states and 7259 transitions. [2022-01-19 08:58:35,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 143 states, 142 states have (on average 51.11971830985915) internal successors, (7259), 142 states have internal predecessors, (7259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:58:35,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 143 states, 143 states have (on average 136.0) internal successors, (19448), 143 states have internal predecessors, (19448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:58:35,235 INFO L81 ComplementDD]: Finished complementDD. Result has 143 states, 143 states have (on average 136.0) internal successors, (19448), 143 states have internal predecessors, (19448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:58:35,235 INFO L186 Difference]: Start difference. First operand has 735 places, 2553 transitions, 53641 flow. Second operand 142 states and 7259 transitions. [2022-01-19 08:58:35,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 862 places, 4107 transitions, 96969 flow [2022-01-19 08:58:55,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 828 places, 4107 transitions, 94227 flow, removed 1290 selfloop flow, removed 34 redundant places. [2022-01-19 08:58:55,265 INFO L242 Difference]: Finished difference. Result has 881 places, 3456 transitions, 82613 flow [2022-01-19 08:58:55,266 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=52113, PETRI_DIFFERENCE_MINUEND_PLACES=687, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1796, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=142, PETRI_FLOW=82613, PETRI_PLACES=881, PETRI_TRANSITIONS=3456} [2022-01-19 08:58:55,267 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 760 predicate places. [2022-01-19 08:58:55,267 INFO L470 AbstractCegarLoop]: Abstraction has has 881 places, 3456 transitions, 82613 flow [2022-01-19 08:58:55,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 48.464285714285715) internal successors, (4071), 84 states have internal predecessors, (4071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:58:55,267 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:58:55,267 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:58:55,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-19 08:58:55,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-19 08:58:55,483 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:58:55,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:58:55,484 INFO L85 PathProgramCache]: Analyzing trace with hash -859918472, now seen corresponding path program 7 times [2022-01-19 08:58:55,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:58:55,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841711484] [2022-01-19 08:58:55,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:58:55,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:58:55,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:58:56,727 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:58:56,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:58:56,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841711484] [2022-01-19 08:58:56,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841711484] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:58:56,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877301222] [2022-01-19 08:58:56,728 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 08:58:56,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:58:56,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:58:56,730 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 08:58:56,731 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 08:58:56,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:58:56,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 64 conjunts are in the unsatisfiable core [2022-01-19 08:58:56,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:58:56,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-19 08:58:57,098 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 08:58:57,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-01-19 08:58:58,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-19 08:58:58,545 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-19 08:58:58,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2022-01-19 08:58:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:58:58,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:58:59,664 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:58:59,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 95 [2022-01-19 08:58:59,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 49 [2022-01-19 08:59:01,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-19 08:59:01,812 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:59:01,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877301222] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:59:01,813 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:59:01,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 32, 32] total 88 [2022-01-19 08:59:01,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031839433] [2022-01-19 08:59:01,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:59:01,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-19 08:59:01,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:59:01,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-19 08:59:01,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=7075, Unknown=6, NotChecked=0, Total=7656 [2022-01-19 08:59:01,831 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 136 [2022-01-19 08:59:01,833 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 881 places, 3456 transitions, 82613 flow. Second operand has 88 states, 88 states have (on average 49.28409090909091) internal successors, (4337), 88 states have internal predecessors, (4337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:01,833 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:59:01,833 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 136 [2022-01-19 08:59:01,833 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:59:41,189 INFO L129 PetriNetUnfolder]: 17043/34495 cut-off events. [2022-01-19 08:59:41,190 INFO L130 PetriNetUnfolder]: For 2074350/2074477 co-relation queries the response was YES. [2022-01-19 08:59:42,291 INFO L84 FinitePrefix]: Finished finitePrefix Result has 404859 conditions, 34495 events. 17043/34495 cut-off events. For 2074350/2074477 co-relation queries the response was YES. Maximal size of possible extension queue 1792. Compared 363321 event pairs, 1640 based on Foata normal form. 26/34387 useless extension candidates. Maximal degree in co-relation 404621. Up to 16099 conditions per place. [2022-01-19 08:59:42,544 INFO L132 encePairwiseOnDemand]: 92/136 looper letters, 1835 selfloop transitions, 2566 changer transitions 56/4497 dead transitions. [2022-01-19 08:59:42,544 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 948 places, 4497 transitions, 118091 flow [2022-01-19 08:59:42,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-19 08:59:42,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2022-01-19 08:59:42,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 4579 transitions. [2022-01-19 08:59:42,548 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3783046926635823 [2022-01-19 08:59:42,548 INFO L72 ComplementDD]: Start complementDD. Operand 89 states and 4579 transitions. [2022-01-19 08:59:42,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 89 states and 4579 transitions. [2022-01-19 08:59:42,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:59:42,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 89 states and 4579 transitions. [2022-01-19 08:59:42,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 90 states, 89 states have (on average 51.449438202247194) internal successors, (4579), 89 states have internal predecessors, (4579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:42,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 90 states, 90 states have (on average 136.0) internal successors, (12240), 90 states have internal predecessors, (12240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:42,560 INFO L81 ComplementDD]: Finished complementDD. Result has 90 states, 90 states have (on average 136.0) internal successors, (12240), 90 states have internal predecessors, (12240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:59:42,560 INFO L186 Difference]: Start difference. First operand has 881 places, 3456 transitions, 82613 flow. Second operand 89 states and 4579 transitions. [2022-01-19 08:59:42,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 948 places, 4497 transitions, 118091 flow [2022-01-19 09:00:10,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 881 places, 4497 transitions, 116189 flow, removed 805 selfloop flow, removed 67 redundant places. [2022-01-19 09:00:10,442 INFO L242 Difference]: Finished difference. Result has 911 places, 4197 transitions, 112383 flow [2022-01-19 09:00:10,444 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=81364, PETRI_DIFFERENCE_MINUEND_PLACES=793, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1839, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=89, PETRI_FLOW=112383, PETRI_PLACES=911, PETRI_TRANSITIONS=4197} [2022-01-19 09:00:10,444 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 790 predicate places. [2022-01-19 09:00:10,444 INFO L470 AbstractCegarLoop]: Abstraction has has 911 places, 4197 transitions, 112383 flow [2022-01-19 09:00:10,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 49.28409090909091) internal successors, (4337), 88 states have internal predecessors, (4337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:00:10,445 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:00:10,445 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:00:10,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-19 09:00:10,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-19 09:00:10,661 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:00:10,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:00:10,662 INFO L85 PathProgramCache]: Analyzing trace with hash 288974610, now seen corresponding path program 8 times [2022-01-19 09:00:10,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:00:10,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612330225] [2022-01-19 09:00:10,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:00:10,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:00:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:00:11,666 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:00:11,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:00:11,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612330225] [2022-01-19 09:00:11,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612330225] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:00:11,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142227162] [2022-01-19 09:00:11,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 09:00:11,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:00:11,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:00:11,668 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:00:11,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-19 09:00:11,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 09:00:11,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:00:11,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 68 conjunts are in the unsatisfiable core [2022-01-19 09:00:11,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:00:12,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-19 09:00:12,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-19 09:00:12,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-19 09:00:13,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 09:00:13,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-19 09:00:13,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-19 09:00:13,470 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:00:13,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:00:17,476 INFO L353 Elim1Store]: treesize reduction 28, result has 54.8 percent of original size [2022-01-19 09:00:17,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 148 treesize of output 105 [2022-01-19 09:00:17,496 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 09:00:17,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 524 treesize of output 508 [2022-01-19 09:00:17,511 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 09:00:17,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 383 treesize of output 357 [2022-01-19 09:00:17,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 387 treesize of output 315 [2022-01-19 09:00:20,105 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:00:20,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142227162] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:00:20,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:00:20,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34, 35] total 91 [2022-01-19 09:00:20,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912416670] [2022-01-19 09:00:20,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:00:20,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-19 09:00:20,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:00:20,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-19 09:00:20,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=7458, Unknown=83, NotChecked=0, Total=8190 [2022-01-19 09:00:20,110 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 136 [2022-01-19 09:00:20,112 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 911 places, 4197 transitions, 112383 flow. Second operand has 91 states, 91 states have (on average 47.26373626373626) internal successors, (4301), 91 states have internal predecessors, (4301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:00:20,112 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:00:20,112 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 136 [2022-01-19 09:00:20,112 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:01:18,074 INFO L129 PetriNetUnfolder]: 17824/36115 cut-off events. [2022-01-19 09:01:18,074 INFO L130 PetriNetUnfolder]: For 2797867/2798049 co-relation queries the response was YES. [2022-01-19 09:01:19,517 INFO L84 FinitePrefix]: Finished finitePrefix Result has 468295 conditions, 36115 events. 17824/36115 cut-off events. For 2797867/2798049 co-relation queries the response was YES. Maximal size of possible extension queue 1877. Compared 383423 event pairs, 533 based on Foata normal form. 44/36074 useless extension candidates. Maximal degree in co-relation 468049. Up to 8139 conditions per place. [2022-01-19 09:01:19,744 INFO L132 encePairwiseOnDemand]: 94/136 looper letters, 1050 selfloop transitions, 3971 changer transitions 81/5141 dead transitions. [2022-01-19 09:01:19,745 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1006 places, 5141 transitions, 146872 flow [2022-01-19 09:01:19,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-19 09:01:19,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2022-01-19 09:01:19,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 5406 transitions. [2022-01-19 09:01:19,750 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3646788990825688 [2022-01-19 09:01:19,750 INFO L72 ComplementDD]: Start complementDD. Operand 109 states and 5406 transitions. [2022-01-19 09:01:19,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 109 states and 5406 transitions. [2022-01-19 09:01:19,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:01:19,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 109 states and 5406 transitions. [2022-01-19 09:01:19,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 110 states, 109 states have (on average 49.596330275229356) internal successors, (5406), 109 states have internal predecessors, (5406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:01:19,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 110 states, 110 states have (on average 136.0) internal successors, (14960), 110 states have internal predecessors, (14960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:01:19,798 INFO L81 ComplementDD]: Finished complementDD. Result has 110 states, 110 states have (on average 136.0) internal successors, (14960), 110 states have internal predecessors, (14960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:01:19,798 INFO L186 Difference]: Start difference. First operand has 911 places, 4197 transitions, 112383 flow. Second operand 109 states and 5406 transitions. [2022-01-19 09:01:19,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1006 places, 5141 transitions, 146872 flow [2022-01-19 09:02:07,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 950 places, 5141 transitions, 144852 flow, removed 911 selfloop flow, removed 56 redundant places. [2022-01-19 09:02:07,939 INFO L242 Difference]: Finished difference. Result has 981 places, 4841 transitions, 143398 flow [2022-01-19 09:02:07,942 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=111157, PETRI_DIFFERENCE_MINUEND_PLACES=842, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3328, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=693, PETRI_DIFFERENCE_SUBTRAHEND_STATES=109, PETRI_FLOW=143398, PETRI_PLACES=981, PETRI_TRANSITIONS=4841} [2022-01-19 09:02:07,947 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 860 predicate places. [2022-01-19 09:02:07,947 INFO L470 AbstractCegarLoop]: Abstraction has has 981 places, 4841 transitions, 143398 flow [2022-01-19 09:02:07,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 47.26373626373626) internal successors, (4301), 91 states have internal predecessors, (4301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:02:07,948 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:02:07,948 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:02:07,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-19 09:02:08,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-19 09:02:08,159 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:02:08,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:02:08,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1092412622, now seen corresponding path program 9 times [2022-01-19 09:02:08,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:02:08,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170159830] [2022-01-19 09:02:08,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:02:08,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:02:08,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:02:09,189 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:02:09,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:02:09,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170159830] [2022-01-19 09:02:09,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170159830] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:02:09,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717209588] [2022-01-19 09:02:09,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 09:02:09,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:02:09,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:02:09,191 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:02:09,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-19 09:02:09,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 09:02:09,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:02:09,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-19 09:02:09,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:02:09,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-19 09:02:09,475 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 09:02:09,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-01-19 09:02:09,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-19 09:02:09,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-19 09:02:10,264 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 09:02:10,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:02:10,851 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 09:02:10,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 95 [2022-01-19 09:02:10,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 49 [2022-01-19 09:02:11,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-19 09:02:11,656 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 09:02:11,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717209588] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:02:11,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:02:11,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 23, 23] total 66 [2022-01-19 09:02:11,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248228337] [2022-01-19 09:02:11,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:02:11,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-19 09:02:11,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:02:11,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-19 09:02:11,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=4064, Unknown=3, NotChecked=0, Total=4290 [2022-01-19 09:02:11,660 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 136 [2022-01-19 09:02:11,661 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 981 places, 4841 transitions, 143398 flow. Second operand has 66 states, 66 states have (on average 47.68181818181818) internal successors, (3147), 66 states have internal predecessors, (3147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:02:11,661 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:02:11,661 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 136 [2022-01-19 09:02:11,661 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:03:12,863 INFO L129 PetriNetUnfolder]: 18955/38157 cut-off events. [2022-01-19 09:03:12,864 INFO L130 PetriNetUnfolder]: For 3716994/3717176 co-relation queries the response was YES. [2022-01-19 09:03:14,088 INFO L84 FinitePrefix]: Finished finitePrefix Result has 550723 conditions, 38157 events. 18955/38157 cut-off events. For 3716994/3717176 co-relation queries the response was YES. Maximal size of possible extension queue 2011. Compared 404743 event pairs, 777 based on Foata normal form. 49/38083 useless extension candidates. Maximal degree in co-relation 550461. Up to 12904 conditions per place. [2022-01-19 09:03:14,359 INFO L132 encePairwiseOnDemand]: 98/136 looper letters, 2169 selfloop transitions, 3405 changer transitions 97/5710 dead transitions. [2022-01-19 09:03:14,359 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1058 places, 5710 transitions, 179802 flow [2022-01-19 09:03:14,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-19 09:03:14,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-01-19 09:03:14,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 4598 transitions. [2022-01-19 09:03:14,362 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3635357368753953 [2022-01-19 09:03:14,362 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 4598 transitions. [2022-01-19 09:03:14,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 4598 transitions. [2022-01-19 09:03:14,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:03:14,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 4598 transitions. [2022-01-19 09:03:14,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 49.44086021505376) internal successors, (4598), 93 states have internal predecessors, (4598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:03:14,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 136.0) internal successors, (12784), 94 states have internal predecessors, (12784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:03:14,372 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 136.0) internal successors, (12784), 94 states have internal predecessors, (12784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:03:14,372 INFO L186 Difference]: Start difference. First operand has 981 places, 4841 transitions, 143398 flow. Second operand 93 states and 4598 transitions. [2022-01-19 09:03:14,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1058 places, 5710 transitions, 179802 flow [2022-01-19 09:04:20,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1005 places, 5710 transitions, 176652 flow, removed 1450 selfloop flow, removed 53 redundant places. [2022-01-19 09:04:20,427 INFO L242 Difference]: Finished difference. Result has 1024 places, 5264 transitions, 165280 flow [2022-01-19 09:04:20,430 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=141297, PETRI_DIFFERENCE_MINUEND_PLACES=913, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4841, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2974, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1791, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=165280, PETRI_PLACES=1024, PETRI_TRANSITIONS=5264} [2022-01-19 09:04:20,431 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 903 predicate places. [2022-01-19 09:04:20,431 INFO L470 AbstractCegarLoop]: Abstraction has has 1024 places, 5264 transitions, 165280 flow [2022-01-19 09:04:20,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 47.68181818181818) internal successors, (3147), 66 states have internal predecessors, (3147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:04:20,431 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:04:20,431 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:04:20,447 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 09:04:20,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-19 09:04:20,647 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:04:20,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:04:20,647 INFO L85 PathProgramCache]: Analyzing trace with hash 232497836, now seen corresponding path program 10 times [2022-01-19 09:04:20,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:04:20,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481259371] [2022-01-19 09:04:20,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:04:20,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:04:20,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:04:21,492 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:04:21,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:04:21,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481259371] [2022-01-19 09:04:21,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481259371] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:04:21,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998882585] [2022-01-19 09:04:21,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 09:04:21,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:04:21,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:04:21,493 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:04:21,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-19 09:04:21,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 09:04:21,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:04:21,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 63 conjunts are in the unsatisfiable core [2022-01-19 09:04:21,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:04:21,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-19 09:04:21,721 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 09:04:21,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-01-19 09:04:22,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-01-19 09:04:22,463 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-19 09:04:22,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2022-01-19 09:04:22,726 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:04:22,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:04:23,172 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 09:04:23,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 95 [2022-01-19 09:04:23,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 49 [2022-01-19 09:04:24,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-19 09:04:24,729 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:04:24,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998882585] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:04:24,730 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:04:24,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 82 [2022-01-19 09:04:24,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988927495] [2022-01-19 09:04:24,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:04:24,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-19 09:04:24,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:04:24,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-19 09:04:24,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=6058, Unknown=3, NotChecked=0, Total=6642 [2022-01-19 09:04:24,733 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 136 [2022-01-19 09:04:24,734 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1024 places, 5264 transitions, 165280 flow. Second operand has 82 states, 82 states have (on average 49.28048780487805) internal successors, (4041), 82 states have internal predecessors, (4041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:04:24,735 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:04:24,735 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 136 [2022-01-19 09:04:24,735 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:05:36,467 INFO L129 PetriNetUnfolder]: 20375/41324 cut-off events. [2022-01-19 09:05:36,467 INFO L130 PetriNetUnfolder]: For 3730717/3730916 co-relation queries the response was YES. [2022-01-19 09:05:39,434 INFO L84 FinitePrefix]: Finished finitePrefix Result has 583289 conditions, 41324 events. 20375/41324 cut-off events. For 3730717/3730916 co-relation queries the response was YES. Maximal size of possible extension queue 2113. Compared 444511 event pairs, 2318 based on Foata normal form. 44/41209 useless extension candidates. Maximal degree in co-relation 583021. Up to 24157 conditions per place. [2022-01-19 09:05:39,755 INFO L132 encePairwiseOnDemand]: 94/136 looper letters, 3444 selfloop transitions, 2771 changer transitions 59/6314 dead transitions. [2022-01-19 09:05:39,755 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1104 places, 6314 transitions, 211320 flow [2022-01-19 09:05:39,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-19 09:05:39,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2022-01-19 09:05:39,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 5345 transitions. [2022-01-19 09:05:39,772 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3778987556561086 [2022-01-19 09:05:39,772 INFO L72 ComplementDD]: Start complementDD. Operand 104 states and 5345 transitions. [2022-01-19 09:05:39,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 104 states and 5345 transitions. [2022-01-19 09:05:39,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:05:39,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 104 states and 5345 transitions. [2022-01-19 09:05:39,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 105 states, 104 states have (on average 51.39423076923077) internal successors, (5345), 104 states have internal predecessors, (5345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:05:39,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 105 states, 105 states have (on average 136.0) internal successors, (14280), 105 states have internal predecessors, (14280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:05:39,782 INFO L81 ComplementDD]: Finished complementDD. Result has 105 states, 105 states have (on average 136.0) internal successors, (14280), 105 states have internal predecessors, (14280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:05:39,782 INFO L186 Difference]: Start difference. First operand has 1024 places, 5264 transitions, 165280 flow. Second operand 104 states and 5345 transitions. [2022-01-19 09:05:39,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1104 places, 6314 transitions, 211320 flow [2022-01-19 09:06:49,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1051 places, 6314 transitions, 210480 flow, removed 295 selfloop flow, removed 53 redundant places. [2022-01-19 09:06:49,452 INFO L242 Difference]: Finished difference. Result has 1084 places, 5987 transitions, 201609 flow [2022-01-19 09:06:49,456 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=164530, PETRI_DIFFERENCE_MINUEND_PLACES=948, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2074, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=104, PETRI_FLOW=201609, PETRI_PLACES=1084, PETRI_TRANSITIONS=5987} [2022-01-19 09:06:49,456 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 963 predicate places. [2022-01-19 09:06:49,456 INFO L470 AbstractCegarLoop]: Abstraction has has 1084 places, 5987 transitions, 201609 flow [2022-01-19 09:06:49,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 49.28048780487805) internal successors, (4041), 82 states have internal predecessors, (4041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:06:49,457 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:06:49,457 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 09:06:49,473 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 09:06:49,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:06:49,665 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:06:49,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:06:49,665 INFO L85 PathProgramCache]: Analyzing trace with hash 744266758, now seen corresponding path program 11 times [2022-01-19 09:06:49,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:06:49,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617790247] [2022-01-19 09:06:49,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:06:49,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:06:49,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:06:50,516 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:06:50,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:06:50,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617790247] [2022-01-19 09:06:50,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617790247] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:06:50,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509214894] [2022-01-19 09:06:50,516 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 09:06:50,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:06:50,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:06:50,517 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:06:50,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-19 09:06:50,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 09:06:50,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:06:50,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-19 09:06:50,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:06:50,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-19 09:06:50,772 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 09:06:50,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-01-19 09:06:51,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-19 09:06:51,369 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-19 09:06:51,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2022-01-19 09:06:51,691 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 09:06:51,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:06:52,239 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 09:06:52,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 95 [2022-01-19 09:06:52,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 49 [2022-01-19 09:06:53,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-19 09:06:53,613 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 09:06:53,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509214894] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:06:53,613 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:06:53,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 23, 23] total 67 [2022-01-19 09:06:53,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005547193] [2022-01-19 09:06:53,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:06:53,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-19 09:06:53,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:06:53,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-19 09:06:53,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=4089, Unknown=1, NotChecked=0, Total=4422 [2022-01-19 09:06:53,616 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 136 [2022-01-19 09:06:53,617 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1084 places, 5987 transitions, 201609 flow. Second operand has 67 states, 67 states have (on average 49.865671641791046) internal successors, (3341), 67 states have internal predecessors, (3341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:06:53,617 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:06:53,617 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 136 [2022-01-19 09:06:53,617 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:08:25,356 INFO L129 PetriNetUnfolder]: 21832/44236 cut-off events. [2022-01-19 09:08:25,357 INFO L130 PetriNetUnfolder]: For 4490522/4490812 co-relation queries the response was YES. [2022-01-19 09:08:27,431 INFO L84 FinitePrefix]: Finished finitePrefix Result has 660517 conditions, 44236 events. 21832/44236 cut-off events. For 4490522/4490812 co-relation queries the response was YES. Maximal size of possible extension queue 2233. Compared 477104 event pairs, 2792 based on Foata normal form. 105/44196 useless extension candidates. Maximal degree in co-relation 660225. Up to 20795 conditions per place. [2022-01-19 09:08:27,832 INFO L132 encePairwiseOnDemand]: 98/136 looper letters, 3119 selfloop transitions, 4024 changer transitions 82/7265 dead transitions. [2022-01-19 09:08:27,833 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1132 places, 7265 transitions, 258704 flow [2022-01-19 09:08:27,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-19 09:08:27,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-01-19 09:08:27,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3141 transitions. [2022-01-19 09:08:27,835 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3786162005785921 [2022-01-19 09:08:27,835 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3141 transitions. [2022-01-19 09:08:27,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3141 transitions. [2022-01-19 09:08:27,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:08:27,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3141 transitions. [2022-01-19 09:08:27,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 51.49180327868852) internal successors, (3141), 61 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:08:27,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 136.0) internal successors, (8432), 62 states have internal predecessors, (8432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:08:27,841 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 136.0) internal successors, (8432), 62 states have internal predecessors, (8432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 09:08:27,841 INFO L186 Difference]: Start difference. First operand has 1084 places, 5987 transitions, 201609 flow. Second operand 61 states and 3141 transitions. [2022-01-19 09:08:27,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1132 places, 7265 transitions, 258704 flow Received shutdown request... [2022-01-19 09:09:16,534 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 09:09:16,534 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 09:09:16,562 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-01-19 09:09:16,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-19 09:09:16,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:09:16,771 WARN L594 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2022-01-19 09:09:16,773 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-19 09:09:16,773 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-19 09:09:16,776 INFO L732 BasicCegarLoop]: Path program histogram: [11, 3, 2, 1, 1, 1] [2022-01-19 09:09:16,777 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-19 09:09:16,777 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-19 09:09:16,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.01 09:09:16 BasicIcfg [2022-01-19 09:09:16,784 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-19 09:09:16,784 INFO L158 Benchmark]: Toolchain (without parser) took 831671.44ms. Allocated memory was 400.6MB in the beginning and 11.1GB in the end (delta: 10.7GB). Free memory was 346.0MB in the beginning and 8.1GB in the end (delta: -7.8GB). Peak memory consumption was 4.5GB. Max. memory is 16.0GB. [2022-01-19 09:09:16,784 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 400.6MB. Free memory is still 362.3MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 09:09:16,784 INFO L158 Benchmark]: CACSL2BoogieTranslator took 294.06ms. Allocated memory was 400.6MB in the beginning and 513.8MB in the end (delta: 113.2MB). Free memory was 345.8MB in the beginning and 486.2MB in the end (delta: -140.4MB). Peak memory consumption was 8.0MB. Max. memory is 16.0GB. [2022-01-19 09:09:16,784 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.95ms. Allocated memory is still 513.8MB. Free memory was 486.2MB in the beginning and 484.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 09:09:16,785 INFO L158 Benchmark]: Boogie Preprocessor took 31.47ms. Allocated memory is still 513.8MB. Free memory was 484.1MB in the beginning and 483.0MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 09:09:16,785 INFO L158 Benchmark]: RCFGBuilder took 635.48ms. Allocated memory is still 513.8MB. Free memory was 483.0MB in the beginning and 460.0MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. [2022-01-19 09:09:16,785 INFO L158 Benchmark]: TraceAbstraction took 830664.71ms. Allocated memory was 513.8MB in the beginning and 11.1GB in the end (delta: 10.6GB). Free memory was 458.9MB in the beginning and 8.1GB in the end (delta: -7.6GB). Peak memory consumption was 4.5GB. Max. memory is 16.0GB. [2022-01-19 09:09:16,789 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 400.6MB. Free memory is still 362.3MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 294.06ms. Allocated memory was 400.6MB in the beginning and 513.8MB in the end (delta: 113.2MB). Free memory was 345.8MB in the beginning and 486.2MB in the end (delta: -140.4MB). Peak memory consumption was 8.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 41.95ms. Allocated memory is still 513.8MB. Free memory was 486.2MB in the beginning and 484.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 31.47ms. Allocated memory is still 513.8MB. Free memory was 484.1MB in the beginning and 483.0MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 635.48ms. Allocated memory is still 513.8MB. Free memory was 483.0MB in the beginning and 460.0MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. * TraceAbstraction took 830664.71ms. Allocated memory was 513.8MB in the beginning and 11.1GB in the end (delta: 10.6GB). Free memory was 458.9MB in the beginning and 8.1GB in the end (delta: -7.6GB). Peak memory consumption was 4.5GB. 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: 98]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 146 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: 830.6s, OverallIterations: 19, TraceHistogramMax: 2, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 764.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 21031 SdHoareTripleChecker+Valid, 22.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 21031 mSDsluCounter, 27930 SdHoareTripleChecker+Invalid, 18.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 12986 IncrementalHoareTripleChecker+Unchecked, 35688 mSDsCounter, 4599 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 51679 IncrementalHoareTripleChecker+Invalid, 69264 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4599 mSolverCounterUnsat, 962 mSDtfsCounter, 51679 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5357 GetRequests, 3002 SyntacticMatches, 165 SemanticMatches, 2190 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 128968 ImplicationChecksByTransitivity, 124.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=201609occurred in iteration=18, InterpolantAutomatonStates: 1316, 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, 61.1s InterpolantComputationTime, 4039 NumberOfCodeBlocks, 3998 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 5694 ConstructedInterpolants, 352 QuantifiedInterpolants, 100552 SizeOfPredicates, 410 NumberOfNonLiveVariables, 4176 ConjunctsInSsa, 698 ConjunctsInUnsatCore, 48 InterpolantComputations, 5 PerfectInterpolantSequences, 84/540 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