/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-figure1.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 08:07:36,119 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 08:07:36,121 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 08:07:36,166 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 08:07:36,167 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 08:07:36,168 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 08:07:36,169 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 08:07:36,170 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 08:07:36,178 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 08:07:36,179 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 08:07:36,179 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 08:07:36,180 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 08:07:36,181 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 08:07:36,181 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 08:07:36,182 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 08:07:36,183 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 08:07:36,184 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 08:07:36,185 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 08:07:36,187 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 08:07:36,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 08:07:36,203 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 08:07:36,204 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 08:07:36,205 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 08:07:36,206 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 08:07:36,208 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 08:07:36,208 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 08:07:36,208 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 08:07:36,209 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 08:07:36,209 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 08:07:36,210 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 08:07:36,210 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 08:07:36,211 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 08:07:36,211 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 08:07:36,212 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 08:07:36,213 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 08:07:36,213 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 08:07:36,214 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 08:07:36,214 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 08:07:36,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 08:07:36,223 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 08:07:36,225 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 08:07:36,226 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 08:07:36,253 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 08:07:36,253 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 08:07:36,254 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 08:07:36,254 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 08:07:36,255 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 08:07:36,255 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 08:07:36,255 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 08:07:36,255 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 08:07:36,255 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 08:07:36,256 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 08:07:36,256 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 08:07:36,256 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 08:07:36,257 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 08:07:36,257 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 08:07:36,257 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 08:07:36,257 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 08:07:36,257 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 08:07:36,257 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 08:07:36,257 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 08:07:36,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 08:07:36,258 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 08:07:36,258 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 08:07:36,258 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 08:07:36,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 08:07:36,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 08:07:36,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 08:07:36,258 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 08:07:36,258 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 08:07:36,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 08:07:36,259 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 08:07:36,259 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 08:07:36,259 INFO L138 SettingsManager]: * When to check the insufficient erros location relative to the other error locations=BEFORE [2022-01-19 08:07:36,259 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 08:07:36,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 08:07:36,447 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 08:07:36,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 08:07:36,450 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 08:07:36,451 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 08:07:36,452 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure1.wvr.c [2022-01-19 08:07:36,521 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88834d5c9/02c0bf02c8e24e9a836e761ba9fdb8d1/FLAGc4689f96c [2022-01-19 08:07:36,849 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 08:07:36,849 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1.wvr.c [2022-01-19 08:07:36,854 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88834d5c9/02c0bf02c8e24e9a836e761ba9fdb8d1/FLAGc4689f96c [2022-01-19 08:07:37,273 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88834d5c9/02c0bf02c8e24e9a836e761ba9fdb8d1 [2022-01-19 08:07:37,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 08:07:37,276 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 08:07:37,281 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 08:07:37,281 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 08:07:37,283 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 08:07:37,283 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 08:07:37" (1/1) ... [2022-01-19 08:07:37,284 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cf454fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:07:37, skipping insertion in model container [2022-01-19 08:07:37,284 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 08:07:37" (1/1) ... [2022-01-19 08:07:37,291 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 08:07:37,303 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 08:07:37,453 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-figure1.wvr.c[1991,2004] [2022-01-19 08:07:37,455 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 08:07:37,461 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 08:07:37,490 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-figure1.wvr.c[1991,2004] [2022-01-19 08:07:37,494 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 08:07:37,508 INFO L208 MainTranslator]: Completed translation [2022-01-19 08:07:37,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:07:37 WrapperNode [2022-01-19 08:07:37,509 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 08:07:37,510 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 08:07:37,510 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 08:07:37,510 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 08:07:37,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:07:37" (1/1) ... [2022-01-19 08:07:37,523 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:07:37" (1/1) ... [2022-01-19 08:07:37,543 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 68 [2022-01-19 08:07:37,544 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 08:07:37,544 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 08:07:37,544 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 08:07:37,545 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 08:07:37,551 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:07:37" (1/1) ... [2022-01-19 08:07:37,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:07:37" (1/1) ... [2022-01-19 08:07:37,562 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:07:37" (1/1) ... [2022-01-19 08:07:37,562 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:07:37" (1/1) ... [2022-01-19 08:07:37,570 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:07:37" (1/1) ... [2022-01-19 08:07:37,572 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:07:37" (1/1) ... [2022-01-19 08:07:37,573 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:07:37" (1/1) ... [2022-01-19 08:07:37,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 08:07:37,575 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 08:07:37,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 08:07:37,575 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 08:07:37,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:07:37" (1/1) ... [2022-01-19 08:07:37,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 08:07:37,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:07:37,612 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 08:07:37,642 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 08:07:37,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 08:07:37,652 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-19 08:07:37,653 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-19 08:07:37,653 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-19 08:07:37,653 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-19 08:07:37,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 08:07:37,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 08:07:37,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 08:07:37,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-19 08:07:37,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-19 08:07:37,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 08:07:37,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 08:07:37,656 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 08:07:37,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 08:07:37,657 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 08:07:37,712 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 08:07:37,713 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 08:07:37,861 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 08:07:37,889 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 08:07:37,889 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-19 08:07:37,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 08:07:37 BoogieIcfgContainer [2022-01-19 08:07:37,891 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 08:07:37,892 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 08:07:37,892 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 08:07:37,898 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 08:07:37,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 08:07:37" (1/3) ... [2022-01-19 08:07:37,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40b5d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 08:07:37, skipping insertion in model container [2022-01-19 08:07:37,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:07:37" (2/3) ... [2022-01-19 08:07:37,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40b5d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 08:07:37, skipping insertion in model container [2022-01-19 08:07:37,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 08:07:37" (3/3) ... [2022-01-19 08:07:37,907 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2022-01-19 08:07:37,911 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 08:07:37,911 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 08:07:37,912 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 08:07:37,945 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,946 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,946 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,946 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,947 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,947 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,947 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,947 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,948 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,948 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,948 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,948 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,948 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,949 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,949 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,949 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,949 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,949 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,949 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,950 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,950 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,950 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,950 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,951 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,951 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,951 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,951 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,952 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,952 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,952 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,954 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,954 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,954 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,955 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,955 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,955 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,955 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,955 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,956 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,956 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,956 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,956 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,956 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,956 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,957 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,957 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,957 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,957 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,960 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,960 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,960 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,960 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,960 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,960 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,960 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,961 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,962 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,962 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,962 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,962 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:07:37,965 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-19 08:07:38,020 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 08:07:38,032 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 08:07:38,033 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-19 08:07:38,048 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 79 places, 77 transitions, 170 flow [2022-01-19 08:07:38,101 INFO L129 PetriNetUnfolder]: 5/75 cut-off events. [2022-01-19 08:07:38,102 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 08:07:38,106 INFO L84 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 75 events. 5/75 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 50 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2022-01-19 08:07:38,106 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 77 transitions, 170 flow [2022-01-19 08:07:38,112 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 66 transitions, 144 flow [2022-01-19 08:07:38,138 INFO L129 PetriNetUnfolder]: 5/65 cut-off events. [2022-01-19 08:07:38,138 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 08:07:38,139 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:07:38,139 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] [2022-01-19 08:07:38,140 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:07:38,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:07:38,146 INFO L85 PathProgramCache]: Analyzing trace with hash 751055543, now seen corresponding path program 1 times [2022-01-19 08:07:38,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:07:38,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316331604] [2022-01-19 08:07:38,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:07:38,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:07:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:07:38,488 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 08:07:38,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:07:38,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316331604] [2022-01-19 08:07:38,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316331604] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:07:38,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:07:38,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 08:07:38,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351980508] [2022-01-19 08:07:38,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:07:38,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 08:07:38,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:07:38,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 08:07:38,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-19 08:07:38,541 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 77 [2022-01-19 08:07:38,549 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:38,550 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:07:38,550 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 77 [2022-01-19 08:07:38,552 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:07:38,641 INFO L129 PetriNetUnfolder]: 8/105 cut-off events. [2022-01-19 08:07:38,641 INFO L130 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2022-01-19 08:07:38,642 INFO L84 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 105 events. 8/105 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 180 event pairs, 1 based on Foata normal form. 16/112 useless extension candidates. Maximal degree in co-relation 61. Up to 19 conditions per place. [2022-01-19 08:07:38,643 INFO L132 encePairwiseOnDemand]: 67/77 looper letters, 11 selfloop transitions, 2 changer transitions 7/71 dead transitions. [2022-01-19 08:07:38,643 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 71 transitions, 203 flow [2022-01-19 08:07:38,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 08:07:38,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 08:07:38,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 394 transitions. [2022-01-19 08:07:38,660 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8528138528138528 [2022-01-19 08:07:38,661 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 394 transitions. [2022-01-19 08:07:38,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 394 transitions. [2022-01-19 08:07:38,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:07:38,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 394 transitions. [2022-01-19 08:07:38,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 65.66666666666667) internal successors, (394), 6 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:38,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:38,679 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:38,681 INFO L186 Difference]: Start difference. First operand has 68 places, 66 transitions, 144 flow. Second operand 6 states and 394 transitions. [2022-01-19 08:07:38,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 71 transitions, 203 flow [2022-01-19 08:07:38,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 71 transitions, 189 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 08:07:38,691 INFO L242 Difference]: Finished difference. Result has 72 places, 63 transitions, 146 flow [2022-01-19 08:07:38,693 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=146, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2022-01-19 08:07:38,696 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 4 predicate places. [2022-01-19 08:07:38,696 INFO L470 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 146 flow [2022-01-19 08:07:38,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:38,697 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:07:38,697 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] [2022-01-19 08:07:38,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 08:07:38,697 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:07:38,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:07:38,698 INFO L85 PathProgramCache]: Analyzing trace with hash 600101581, now seen corresponding path program 1 times [2022-01-19 08:07:38,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:07:38,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802042047] [2022-01-19 08:07:38,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:07:38,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:07:38,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:07:38,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:07:38,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:07:38,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802042047] [2022-01-19 08:07:38,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802042047] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:07:38,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:07:38,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 08:07:38,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267169818] [2022-01-19 08:07:38,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:07:38,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 08:07:38,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:07:38,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 08:07:38,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-19 08:07:38,820 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-01-19 08:07:38,820 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 146 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:38,820 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:07:38,820 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-01-19 08:07:38,821 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:07:38,978 INFO L129 PetriNetUnfolder]: 90/304 cut-off events. [2022-01-19 08:07:38,979 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2022-01-19 08:07:38,981 INFO L84 FinitePrefix]: Finished finitePrefix Result has 555 conditions, 304 events. 90/304 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1346 event pairs, 32 based on Foata normal form. 0/264 useless extension candidates. Maximal degree in co-relation 541. Up to 99 conditions per place. [2022-01-19 08:07:38,983 INFO L132 encePairwiseOnDemand]: 70/77 looper letters, 35 selfloop transitions, 5 changer transitions 4/88 dead transitions. [2022-01-19 08:07:38,983 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 88 transitions, 301 flow [2022-01-19 08:07:38,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 08:07:38,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 08:07:38,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 372 transitions. [2022-01-19 08:07:38,985 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8051948051948052 [2022-01-19 08:07:38,985 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 372 transitions. [2022-01-19 08:07:38,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 372 transitions. [2022-01-19 08:07:38,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:07:38,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 372 transitions. [2022-01-19 08:07:38,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 62.0) internal successors, (372), 6 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:38,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:38,989 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:38,989 INFO L186 Difference]: Start difference. First operand has 72 places, 63 transitions, 146 flow. Second operand 6 states and 372 transitions. [2022-01-19 08:07:38,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 88 transitions, 301 flow [2022-01-19 08:07:38,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 88 transitions, 293 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-01-19 08:07:38,992 INFO L242 Difference]: Finished difference. Result has 73 places, 65 transitions, 166 flow [2022-01-19 08:07:38,992 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=166, PETRI_PLACES=73, PETRI_TRANSITIONS=65} [2022-01-19 08:07:38,992 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 5 predicate places. [2022-01-19 08:07:38,992 INFO L470 AbstractCegarLoop]: Abstraction has has 73 places, 65 transitions, 166 flow [2022-01-19 08:07:38,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:38,993 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:07:38,993 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] [2022-01-19 08:07:38,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 08:07:38,993 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:07:38,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:07:38,994 INFO L85 PathProgramCache]: Analyzing trace with hash 651339935, now seen corresponding path program 2 times [2022-01-19 08:07:38,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:07:38,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896481218] [2022-01-19 08:07:38,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:07:38,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:07:39,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:07:39,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:07:39,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:07:39,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896481218] [2022-01-19 08:07:39,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896481218] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:07:39,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65248808] [2022-01-19 08:07:39,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:07:39,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:07:39,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:07:39,107 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 08:07:39,117 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 08:07:39,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:07:39,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:07:39,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-19 08:07:39,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:07:39,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:07:39,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:07:39,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:07:39,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65248808] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:07:39,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:07:39,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-01-19 08:07:39,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150634426] [2022-01-19 08:07:39,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:07:39,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-19 08:07:39,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:07:39,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-19 08:07:39,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-19 08:07:39,426 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-01-19 08:07:39,427 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 65 transitions, 166 flow. Second operand has 9 states, 9 states have (on average 57.666666666666664) internal successors, (519), 9 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:39,427 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:07:39,427 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-01-19 08:07:39,427 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:07:39,658 INFO L129 PetriNetUnfolder]: 147/407 cut-off events. [2022-01-19 08:07:39,658 INFO L130 PetriNetUnfolder]: For 129/137 co-relation queries the response was YES. [2022-01-19 08:07:39,661 INFO L84 FinitePrefix]: Finished finitePrefix Result has 895 conditions, 407 events. 147/407 cut-off events. For 129/137 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1890 event pairs, 12 based on Foata normal form. 11/413 useless extension candidates. Maximal degree in co-relation 727. Up to 54 conditions per place. [2022-01-19 08:07:39,668 INFO L132 encePairwiseOnDemand]: 69/77 looper letters, 54 selfloop transitions, 27 changer transitions 6/131 dead transitions. [2022-01-19 08:07:39,668 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 131 transitions, 560 flow [2022-01-19 08:07:39,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-19 08:07:39,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-01-19 08:07:39,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 854 transitions. [2022-01-19 08:07:39,671 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7922077922077922 [2022-01-19 08:07:39,671 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 854 transitions. [2022-01-19 08:07:39,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 854 transitions. [2022-01-19 08:07:39,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:07:39,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 854 transitions. [2022-01-19 08:07:39,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 61.0) internal successors, (854), 14 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:39,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 77.0) internal successors, (1155), 15 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:39,677 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 77.0) internal successors, (1155), 15 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:39,677 INFO L186 Difference]: Start difference. First operand has 73 places, 65 transitions, 166 flow. Second operand 14 states and 854 transitions. [2022-01-19 08:07:39,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 131 transitions, 560 flow [2022-01-19 08:07:39,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 131 transitions, 535 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-01-19 08:07:39,683 INFO L242 Difference]: Finished difference. Result has 89 places, 91 transitions, 342 flow [2022-01-19 08:07:39,683 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=342, PETRI_PLACES=89, PETRI_TRANSITIONS=91} [2022-01-19 08:07:39,685 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 21 predicate places. [2022-01-19 08:07:39,685 INFO L470 AbstractCegarLoop]: Abstraction has has 89 places, 91 transitions, 342 flow [2022-01-19 08:07:39,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 57.666666666666664) internal successors, (519), 9 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:39,685 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:07:39,685 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] [2022-01-19 08:07:39,705 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 08:07:39,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:07:39,899 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:07:39,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:07:39,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1948148621, now seen corresponding path program 3 times [2022-01-19 08:07:39,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:07:39,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297696610] [2022-01-19 08:07:39,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:07:39,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:07:39,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:07:39,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:07:39,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:07:39,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297696610] [2022-01-19 08:07:39,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297696610] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:07:39,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:07:39,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 08:07:39,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369646490] [2022-01-19 08:07:39,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:07:39,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 08:07:39,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:07:39,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 08:07:39,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-19 08:07:39,971 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-01-19 08:07:39,972 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 91 transitions, 342 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:39,972 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:07:39,972 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-01-19 08:07:39,972 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:07:40,052 INFO L129 PetriNetUnfolder]: 153/421 cut-off events. [2022-01-19 08:07:40,053 INFO L130 PetriNetUnfolder]: For 550/552 co-relation queries the response was YES. [2022-01-19 08:07:40,054 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1197 conditions, 421 events. 153/421 cut-off events. For 550/552 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1942 event pairs, 64 based on Foata normal form. 3/417 useless extension candidates. Maximal degree in co-relation 944. Up to 221 conditions per place. [2022-01-19 08:07:40,058 INFO L132 encePairwiseOnDemand]: 71/77 looper letters, 55 selfloop transitions, 13 changer transitions 0/112 dead transitions. [2022-01-19 08:07:40,058 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 112 transitions, 582 flow [2022-01-19 08:07:40,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-19 08:07:40,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-01-19 08:07:40,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 317 transitions. [2022-01-19 08:07:40,059 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8233766233766234 [2022-01-19 08:07:40,059 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 317 transitions. [2022-01-19 08:07:40,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 317 transitions. [2022-01-19 08:07:40,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:07:40,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 317 transitions. [2022-01-19 08:07:40,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 63.4) internal successors, (317), 5 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:40,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:40,062 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:40,062 INFO L186 Difference]: Start difference. First operand has 89 places, 91 transitions, 342 flow. Second operand 5 states and 317 transitions. [2022-01-19 08:07:40,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 112 transitions, 582 flow [2022-01-19 08:07:40,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 112 transitions, 578 flow, removed 2 selfloop flow, removed 0 redundant places. [2022-01-19 08:07:40,068 INFO L242 Difference]: Finished difference. Result has 95 places, 96 transitions, 415 flow [2022-01-19 08:07:40,068 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=415, PETRI_PLACES=95, PETRI_TRANSITIONS=96} [2022-01-19 08:07:40,068 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 27 predicate places. [2022-01-19 08:07:40,069 INFO L470 AbstractCegarLoop]: Abstraction has has 95 places, 96 transitions, 415 flow [2022-01-19 08:07:40,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:40,069 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:07:40,070 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] [2022-01-19 08:07:40,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-19 08:07:40,070 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:07:40,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:07:40,071 INFO L85 PathProgramCache]: Analyzing trace with hash -497140103, now seen corresponding path program 4 times [2022-01-19 08:07:40,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:07:40,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184043219] [2022-01-19 08:07:40,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:07:40,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:07:40,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:07:40,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:07:40,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:07:40,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184043219] [2022-01-19 08:07:40,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184043219] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:07:40,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407865297] [2022-01-19 08:07:40,168 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 08:07:40,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:07:40,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:07:40,170 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 08:07:40,171 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 08:07:40,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 08:07:40,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:07:40,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-19 08:07:40,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:07:40,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:07:40,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:07:40,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:07:40,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407865297] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:07:40,462 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:07:40,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-01-19 08:07:40,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472935267] [2022-01-19 08:07:40,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:07:40,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-19 08:07:40,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:07:40,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-19 08:07:40,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-01-19 08:07:40,466 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-01-19 08:07:40,467 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 96 transitions, 415 flow. Second operand has 11 states, 11 states have (on average 57.81818181818182) internal successors, (636), 11 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:40,467 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:07:40,467 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-01-19 08:07:40,467 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:07:40,656 INFO L129 PetriNetUnfolder]: 165/506 cut-off events. [2022-01-19 08:07:40,656 INFO L130 PetriNetUnfolder]: For 900/902 co-relation queries the response was YES. [2022-01-19 08:07:40,657 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1419 conditions, 506 events. 165/506 cut-off events. For 900/902 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2591 event pairs, 36 based on Foata normal form. 9/508 useless extension candidates. Maximal degree in co-relation 1102. Up to 114 conditions per place. [2022-01-19 08:07:40,658 INFO L132 encePairwiseOnDemand]: 69/77 looper letters, 66 selfloop transitions, 39 changer transitions 0/149 dead transitions. [2022-01-19 08:07:40,658 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 149 transitions, 883 flow [2022-01-19 08:07:40,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-19 08:07:40,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-19 08:07:40,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 564 transitions. [2022-01-19 08:07:40,661 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8138528138528138 [2022-01-19 08:07:40,661 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 564 transitions. [2022-01-19 08:07:40,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 564 transitions. [2022-01-19 08:07:40,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:07:40,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 564 transitions. [2022-01-19 08:07:40,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 62.666666666666664) internal successors, (564), 9 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:40,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 77.0) internal successors, (770), 10 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:40,666 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 77.0) internal successors, (770), 10 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:40,666 INFO L186 Difference]: Start difference. First operand has 95 places, 96 transitions, 415 flow. Second operand 9 states and 564 transitions. [2022-01-19 08:07:40,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 149 transitions, 883 flow [2022-01-19 08:07:40,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 149 transitions, 867 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-01-19 08:07:40,671 INFO L242 Difference]: Finished difference. Result has 107 places, 113 transitions, 648 flow [2022-01-19 08:07:40,671 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=648, PETRI_PLACES=107, PETRI_TRANSITIONS=113} [2022-01-19 08:07:40,673 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 39 predicate places. [2022-01-19 08:07:40,673 INFO L470 AbstractCegarLoop]: Abstraction has has 107 places, 113 transitions, 648 flow [2022-01-19 08:07:40,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 57.81818181818182) internal successors, (636), 11 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:40,674 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:07:40,674 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] [2022-01-19 08:07:40,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-19 08:07:40,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:07:40,887 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:07:40,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:07:40,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1146310219, now seen corresponding path program 5 times [2022-01-19 08:07:40,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:07:40,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677709531] [2022-01-19 08:07:40,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:07:40,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:07:40,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:07:40,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:07:40,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:07:40,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677709531] [2022-01-19 08:07:40,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677709531] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:07:40,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557202205] [2022-01-19 08:07:40,962 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 08:07:40,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:07:40,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:07:40,965 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 08:07:40,991 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 08:07:41,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:07:41,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:07:41,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-19 08:07:41,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:07:41,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:07:41,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:07:41,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:07:41,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557202205] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:07:41,221 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:07:41,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-01-19 08:07:41,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568464677] [2022-01-19 08:07:41,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:07:41,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-19 08:07:41,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:07:41,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-19 08:07:41,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-01-19 08:07:41,223 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-01-19 08:07:41,224 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 113 transitions, 648 flow. Second operand has 11 states, 11 states have (on average 57.81818181818182) internal successors, (636), 11 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:41,224 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:07:41,224 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-01-19 08:07:41,224 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:07:41,410 INFO L129 PetriNetUnfolder]: 200/610 cut-off events. [2022-01-19 08:07:41,411 INFO L130 PetriNetUnfolder]: For 1371/1373 co-relation queries the response was YES. [2022-01-19 08:07:41,413 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1847 conditions, 610 events. 200/610 cut-off events. For 1371/1373 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3446 event pairs, 16 based on Foata normal form. 11/615 useless extension candidates. Maximal degree in co-relation 1509. Up to 106 conditions per place. [2022-01-19 08:07:41,416 INFO L132 encePairwiseOnDemand]: 69/77 looper letters, 64 selfloop transitions, 52 changer transitions 2/162 dead transitions. [2022-01-19 08:07:41,416 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 162 transitions, 1131 flow [2022-01-19 08:07:41,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-19 08:07:41,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-01-19 08:07:41,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 743 transitions. [2022-01-19 08:07:41,418 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8041125541125541 [2022-01-19 08:07:41,418 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 743 transitions. [2022-01-19 08:07:41,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 743 transitions. [2022-01-19 08:07:41,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:07:41,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 743 transitions. [2022-01-19 08:07:41,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 61.916666666666664) internal successors, (743), 12 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:41,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 77.0) internal successors, (1001), 13 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:41,424 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 77.0) internal successors, (1001), 13 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:41,424 INFO L186 Difference]: Start difference. First operand has 107 places, 113 transitions, 648 flow. Second operand 12 states and 743 transitions. [2022-01-19 08:07:41,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 162 transitions, 1131 flow [2022-01-19 08:07:41,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 162 transitions, 1117 flow, removed 7 selfloop flow, removed 0 redundant places. [2022-01-19 08:07:41,435 INFO L242 Difference]: Finished difference. Result has 121 places, 123 transitions, 850 flow [2022-01-19 08:07:41,435 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=629, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=850, PETRI_PLACES=121, PETRI_TRANSITIONS=123} [2022-01-19 08:07:41,437 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 53 predicate places. [2022-01-19 08:07:41,438 INFO L470 AbstractCegarLoop]: Abstraction has has 121 places, 123 transitions, 850 flow [2022-01-19 08:07:41,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 57.81818181818182) internal successors, (636), 11 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:41,439 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:07:41,439 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] [2022-01-19 08:07:41,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-19 08:07:41,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:07:41,656 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:07:41,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:07:41,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1190561105, now seen corresponding path program 6 times [2022-01-19 08:07:41,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:07:41,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657341935] [2022-01-19 08:07:41,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:07:41,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:07:41,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:07:41,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:07:41,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:07:41,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657341935] [2022-01-19 08:07:41,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657341935] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:07:41,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:07:41,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 08:07:41,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649946172] [2022-01-19 08:07:41,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:07:41,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 08:07:41,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:07:41,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 08:07:41,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-19 08:07:41,705 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-01-19 08:07:41,705 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 123 transitions, 850 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:41,706 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:07:41,706 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-01-19 08:07:41,706 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:07:41,812 INFO L129 PetriNetUnfolder]: 199/570 cut-off events. [2022-01-19 08:07:41,812 INFO L130 PetriNetUnfolder]: For 1517/1519 co-relation queries the response was YES. [2022-01-19 08:07:41,814 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1920 conditions, 570 events. 199/570 cut-off events. For 1517/1519 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3139 event pairs, 91 based on Foata normal form. 1/561 useless extension candidates. Maximal degree in co-relation 1618. Up to 231 conditions per place. [2022-01-19 08:07:41,817 INFO L132 encePairwiseOnDemand]: 71/77 looper letters, 68 selfloop transitions, 23 changer transitions 2/137 dead transitions. [2022-01-19 08:07:41,817 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 137 transitions, 1111 flow [2022-01-19 08:07:41,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-19 08:07:41,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-01-19 08:07:41,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 315 transitions. [2022-01-19 08:07:41,819 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8181818181818182 [2022-01-19 08:07:41,819 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 315 transitions. [2022-01-19 08:07:41,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 315 transitions. [2022-01-19 08:07:41,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:07:41,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 315 transitions. [2022-01-19 08:07:41,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 63.0) internal successors, (315), 5 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:41,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:41,821 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:41,821 INFO L186 Difference]: Start difference. First operand has 121 places, 123 transitions, 850 flow. Second operand 5 states and 315 transitions. [2022-01-19 08:07:41,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 137 transitions, 1111 flow [2022-01-19 08:07:41,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 137 transitions, 1086 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-01-19 08:07:41,829 INFO L242 Difference]: Finished difference. Result has 122 places, 122 transitions, 849 flow [2022-01-19 08:07:41,829 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=849, PETRI_PLACES=122, PETRI_TRANSITIONS=122} [2022-01-19 08:07:41,830 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 54 predicate places. [2022-01-19 08:07:41,830 INFO L470 AbstractCegarLoop]: Abstraction has has 122 places, 122 transitions, 849 flow [2022-01-19 08:07:41,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:41,830 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:07:41,830 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] [2022-01-19 08:07:41,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-19 08:07:41,831 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:07:41,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:07:41,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1682419139, now seen corresponding path program 1 times [2022-01-19 08:07:41,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:07:41,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189406344] [2022-01-19 08:07:41,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:07:41,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:07:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:07:41,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 08:07:41,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:07:41,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189406344] [2022-01-19 08:07:41,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189406344] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:07:41,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038293656] [2022-01-19 08:07:41,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:07:41,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:07:41,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:07:41,932 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 08:07:41,937 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 08:07:41,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:07:41,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 08:07:41,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:07:42,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 08:07:42,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:07:42,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 08:07:42,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038293656] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:07:42,215 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:07:42,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-01-19 08:07:42,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82789057] [2022-01-19 08:07:42,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:07:42,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 08:07:42,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:07:42,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 08:07:42,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-19 08:07:42,217 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 77 [2022-01-19 08:07:42,218 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 122 transitions, 849 flow. Second operand has 6 states, 6 states have (on average 62.833333333333336) internal successors, (377), 6 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:42,218 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:07:42,218 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 77 [2022-01-19 08:07:42,218 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:07:42,313 INFO L129 PetriNetUnfolder]: 103/595 cut-off events. [2022-01-19 08:07:42,313 INFO L130 PetriNetUnfolder]: For 1064/1093 co-relation queries the response was YES. [2022-01-19 08:07:42,316 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1612 conditions, 595 events. 103/595 cut-off events. For 1064/1093 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3915 event pairs, 10 based on Foata normal form. 12/597 useless extension candidates. Maximal degree in co-relation 1465. Up to 79 conditions per place. [2022-01-19 08:07:42,318 INFO L132 encePairwiseOnDemand]: 71/77 looper letters, 18 selfloop transitions, 5 changer transitions 5/137 dead transitions. [2022-01-19 08:07:42,318 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 137 transitions, 939 flow [2022-01-19 08:07:42,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 08:07:42,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 08:07:42,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 395 transitions. [2022-01-19 08:07:42,319 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.854978354978355 [2022-01-19 08:07:42,319 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 395 transitions. [2022-01-19 08:07:42,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 395 transitions. [2022-01-19 08:07:42,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:07:42,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 395 transitions. [2022-01-19 08:07:42,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 65.83333333333333) internal successors, (395), 6 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:42,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:42,322 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:42,322 INFO L186 Difference]: Start difference. First operand has 122 places, 122 transitions, 849 flow. Second operand 6 states and 395 transitions. [2022-01-19 08:07:42,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 137 transitions, 939 flow [2022-01-19 08:07:42,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 137 transitions, 829 flow, removed 3 selfloop flow, removed 11 redundant places. [2022-01-19 08:07:42,329 INFO L242 Difference]: Finished difference. Result has 118 places, 124 transitions, 771 flow [2022-01-19 08:07:42,329 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=729, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=771, PETRI_PLACES=118, PETRI_TRANSITIONS=124} [2022-01-19 08:07:42,329 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 50 predicate places. [2022-01-19 08:07:42,330 INFO L470 AbstractCegarLoop]: Abstraction has has 118 places, 124 transitions, 771 flow [2022-01-19 08:07:42,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 62.833333333333336) internal successors, (377), 6 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:42,330 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:07:42,330 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 08:07:42,353 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 08:07:42,551 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 08:07:42,551 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:07:42,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:07:42,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1656979189, now seen corresponding path program 2 times [2022-01-19 08:07:42,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:07:42,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044991179] [2022-01-19 08:07:42,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:07:42,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:07:42,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:07:42,628 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:07:42,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:07:42,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044991179] [2022-01-19 08:07:42,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044991179] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:07:42,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81848615] [2022-01-19 08:07:42,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:07:42,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:07:42,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:07:42,630 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 08:07:42,663 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 08:07:42,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:07:42,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:07:42,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:07:42,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:07:42,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:07:42,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:07:43,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:07:43,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81848615] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:07:43,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:07:43,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-01-19 08:07:43,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817480210] [2022-01-19 08:07:43,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:07:43,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 08:07:43,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:07:43,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 08:07:43,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-01-19 08:07:43,078 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 08:07:43,079 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 124 transitions, 771 flow. Second operand has 19 states, 19 states have (on average 55.78947368421053) internal successors, (1060), 19 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:43,079 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:07:43,079 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 08:07:43,079 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:07:44,479 INFO L129 PetriNetUnfolder]: 1266/3622 cut-off events. [2022-01-19 08:07:44,479 INFO L130 PetriNetUnfolder]: For 5997/5997 co-relation queries the response was YES. [2022-01-19 08:07:44,493 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11411 conditions, 3622 events. 1266/3622 cut-off events. For 5997/5997 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 30698 event pairs, 136 based on Foata normal form. 34/3644 useless extension candidates. Maximal degree in co-relation 11308. Up to 388 conditions per place. [2022-01-19 08:07:44,509 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 231 selfloop transitions, 207 changer transitions 28/508 dead transitions. [2022-01-19 08:07:44,509 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 508 transitions, 4079 flow [2022-01-19 08:07:44,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-19 08:07:44,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-01-19 08:07:44,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3555 transitions. [2022-01-19 08:07:44,517 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7568660847349372 [2022-01-19 08:07:44,517 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3555 transitions. [2022-01-19 08:07:44,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3555 transitions. [2022-01-19 08:07:44,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:07:44,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3555 transitions. [2022-01-19 08:07:44,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 58.278688524590166) internal successors, (3555), 61 states have internal predecessors, (3555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:44,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 77.0) internal successors, (4774), 62 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:44,536 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 77.0) internal successors, (4774), 62 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:44,536 INFO L186 Difference]: Start difference. First operand has 118 places, 124 transitions, 771 flow. Second operand 61 states and 3555 transitions. [2022-01-19 08:07:44,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 508 transitions, 4079 flow [2022-01-19 08:07:44,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 508 transitions, 4007 flow, removed 36 selfloop flow, removed 2 redundant places. [2022-01-19 08:07:44,557 INFO L242 Difference]: Finished difference. Result has 190 places, 327 transitions, 2668 flow [2022-01-19 08:07:44,557 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=763, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=2668, PETRI_PLACES=190, PETRI_TRANSITIONS=327} [2022-01-19 08:07:44,558 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 122 predicate places. [2022-01-19 08:07:44,558 INFO L470 AbstractCegarLoop]: Abstraction has has 190 places, 327 transitions, 2668 flow [2022-01-19 08:07:44,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.78947368421053) internal successors, (1060), 19 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:44,558 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:07:44,558 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 08:07:44,586 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 08:07:44,781 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 08:07:44,782 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:07:44,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:07:44,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1790021439, now seen corresponding path program 3 times [2022-01-19 08:07:44,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:07:44,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11902337] [2022-01-19 08:07:44,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:07:44,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:07:44,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:07:44,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:07:44,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:07:44,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11902337] [2022-01-19 08:07:44,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11902337] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:07:44,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134121864] [2022-01-19 08:07:44,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 08:07:44,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:07:44,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:07:44,868 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 08:07:44,869 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 08:07:44,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 08:07:44,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:07:44,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:07:44,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:07:45,120 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:07:45,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:07:45,232 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:07:45,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134121864] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:07:45,232 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:07:45,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-19 08:07:45,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067734203] [2022-01-19 08:07:45,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:07:45,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-19 08:07:45,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:07:45,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-19 08:07:45,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-01-19 08:07:45,237 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 08:07:45,238 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 327 transitions, 2668 flow. Second operand has 16 states, 16 states have (on average 55.75) internal successors, (892), 16 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:45,238 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:07:45,238 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 08:07:45,238 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:07:46,087 INFO L129 PetriNetUnfolder]: 1421/4102 cut-off events. [2022-01-19 08:07:46,087 INFO L130 PetriNetUnfolder]: For 17951/17951 co-relation queries the response was YES. [2022-01-19 08:07:46,113 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16930 conditions, 4102 events. 1421/4102 cut-off events. For 17951/17951 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 36168 event pairs, 243 based on Foata normal form. 19/4087 useless extension candidates. Maximal degree in co-relation 15806. Up to 963 conditions per place. [2022-01-19 08:07:46,135 INFO L132 encePairwiseOnDemand]: 66/77 looper letters, 190 selfloop transitions, 268 changer transitions 33/533 dead transitions. [2022-01-19 08:07:46,135 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 533 transitions, 5469 flow [2022-01-19 08:07:46,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-19 08:07:46,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-01-19 08:07:46,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1355 transitions. [2022-01-19 08:07:46,137 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7651044607566346 [2022-01-19 08:07:46,137 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1355 transitions. [2022-01-19 08:07:46,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1355 transitions. [2022-01-19 08:07:46,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:07:46,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1355 transitions. [2022-01-19 08:07:46,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 58.91304347826087) internal successors, (1355), 23 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:46,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 77.0) internal successors, (1848), 24 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:46,204 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 77.0) internal successors, (1848), 24 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:46,204 INFO L186 Difference]: Start difference. First operand has 190 places, 327 transitions, 2668 flow. Second operand 23 states and 1355 transitions. [2022-01-19 08:07:46,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 533 transitions, 5469 flow [2022-01-19 08:07:46,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 533 transitions, 5102 flow, removed 120 selfloop flow, removed 7 redundant places. [2022-01-19 08:07:46,334 INFO L242 Difference]: Finished difference. Result has 215 places, 413 transitions, 4025 flow [2022-01-19 08:07:46,334 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=2387, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4025, PETRI_PLACES=215, PETRI_TRANSITIONS=413} [2022-01-19 08:07:46,335 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 147 predicate places. [2022-01-19 08:07:46,335 INFO L470 AbstractCegarLoop]: Abstraction has has 215 places, 413 transitions, 4025 flow [2022-01-19 08:07:46,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 55.75) internal successors, (892), 16 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:46,335 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:07:46,335 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 08:07:46,359 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 08:07:46,536 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 08:07:46,536 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:07:46,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:07:46,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1983759899, now seen corresponding path program 4 times [2022-01-19 08:07:46,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:07:46,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740372494] [2022-01-19 08:07:46,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:07:46,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:07:46,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:07:46,619 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:07:46,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:07:46,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740372494] [2022-01-19 08:07:46,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740372494] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:07:46,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306618309] [2022-01-19 08:07:46,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 08:07:46,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:07:46,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:07:46,624 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 08:07:46,652 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 08:07:46,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 08:07:46,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:07:46,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:07:46,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:07:46,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:07:46,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:07:47,023 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:07:47,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306618309] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:07:47,024 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:07:47,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-19 08:07:47,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212101037] [2022-01-19 08:07:47,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:07:47,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-19 08:07:47,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:07:47,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-19 08:07:47,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-01-19 08:07:47,026 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 08:07:47,027 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 413 transitions, 4025 flow. Second operand has 18 states, 18 states have (on average 56.111111111111114) internal successors, (1010), 18 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:47,027 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:07:47,027 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 08:07:47,027 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:07:48,390 INFO L129 PetriNetUnfolder]: 1688/4815 cut-off events. [2022-01-19 08:07:48,391 INFO L130 PetriNetUnfolder]: For 32142/32142 co-relation queries the response was YES. [2022-01-19 08:07:48,415 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22322 conditions, 4815 events. 1688/4815 cut-off events. For 32142/32142 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 43903 event pairs, 221 based on Foata normal form. 23/4794 useless extension candidates. Maximal degree in co-relation 21111. Up to 1022 conditions per place. [2022-01-19 08:07:48,447 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 219 selfloop transitions, 356 changer transitions 4/621 dead transitions. [2022-01-19 08:07:48,447 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 621 transitions, 7180 flow [2022-01-19 08:07:48,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-19 08:07:48,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-01-19 08:07:48,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1753 transitions. [2022-01-19 08:07:48,449 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7588744588744589 [2022-01-19 08:07:48,449 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1753 transitions. [2022-01-19 08:07:48,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1753 transitions. [2022-01-19 08:07:48,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:07:48,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1753 transitions. [2022-01-19 08:07:48,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 58.43333333333333) internal successors, (1753), 30 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:48,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 77.0) internal successors, (2387), 31 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:48,456 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 77.0) internal successors, (2387), 31 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:48,456 INFO L186 Difference]: Start difference. First operand has 215 places, 413 transitions, 4025 flow. Second operand 30 states and 1753 transitions. [2022-01-19 08:07:48,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 621 transitions, 7180 flow [2022-01-19 08:07:48,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 621 transitions, 7127 flow, removed 24 selfloop flow, removed 2 redundant places. [2022-01-19 08:07:48,606 INFO L242 Difference]: Finished difference. Result has 256 places, 512 transitions, 6429 flow [2022-01-19 08:07:48,606 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=3996, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=6429, PETRI_PLACES=256, PETRI_TRANSITIONS=512} [2022-01-19 08:07:48,607 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 188 predicate places. [2022-01-19 08:07:48,607 INFO L470 AbstractCegarLoop]: Abstraction has has 256 places, 512 transitions, 6429 flow [2022-01-19 08:07:48,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.111111111111114) internal successors, (1010), 18 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:48,607 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:07:48,607 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 08:07:48,633 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 08:07:48,819 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 08:07:48,819 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:07:48,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:07:48,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1217209175, now seen corresponding path program 5 times [2022-01-19 08:07:48,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:07:48,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188143007] [2022-01-19 08:07:48,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:07:48,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:07:48,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:07:48,881 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:07:48,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:07:48,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188143007] [2022-01-19 08:07:48,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188143007] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:07:48,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017238519] [2022-01-19 08:07:48,882 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 08:07:48,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:07:48,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:07:48,883 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 08:07:48,884 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 08:07:48,936 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-19 08:07:48,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:07:48,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:07:48,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:07:49,090 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:07:49,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:07:49,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:07:49,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017238519] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:07:49,209 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:07:49,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-19 08:07:49,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667754173] [2022-01-19 08:07:49,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:07:49,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-19 08:07:49,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:07:49,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-19 08:07:49,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-01-19 08:07:49,211 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 08:07:49,212 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 512 transitions, 6429 flow. Second operand has 17 states, 17 states have (on average 55.64705882352941) internal successors, (946), 17 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:49,212 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:07:49,212 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 08:07:49,213 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:07:50,828 INFO L129 PetriNetUnfolder]: 2056/6005 cut-off events. [2022-01-19 08:07:50,828 INFO L130 PetriNetUnfolder]: For 63127/63127 co-relation queries the response was YES. [2022-01-19 08:07:50,861 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32168 conditions, 6005 events. 2056/6005 cut-off events. For 63127/63127 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 58570 event pairs, 190 based on Foata normal form. 4/5983 useless extension candidates. Maximal degree in co-relation 31845. Up to 791 conditions per place. [2022-01-19 08:07:50,948 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 342 selfloop transitions, 417 changer transitions 13/814 dead transitions. [2022-01-19 08:07:50,948 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 814 transitions, 11197 flow [2022-01-19 08:07:50,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-19 08:07:50,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-01-19 08:07:50,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2713 transitions. [2022-01-19 08:07:50,960 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7496546007184305 [2022-01-19 08:07:50,961 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2713 transitions. [2022-01-19 08:07:50,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2713 transitions. [2022-01-19 08:07:50,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:07:50,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2713 transitions. [2022-01-19 08:07:50,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 57.723404255319146) internal successors, (2713), 47 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:50,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 77.0) internal successors, (3696), 48 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:50,975 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 77.0) internal successors, (3696), 48 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:50,975 INFO L186 Difference]: Start difference. First operand has 256 places, 512 transitions, 6429 flow. Second operand 47 states and 2713 transitions. [2022-01-19 08:07:50,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 814 transitions, 11197 flow [2022-01-19 08:07:51,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 814 transitions, 10756 flow, removed 93 selfloop flow, removed 9 redundant places. [2022-01-19 08:07:51,342 INFO L242 Difference]: Finished difference. Result has 307 places, 657 transitions, 9167 flow [2022-01-19 08:07:51,342 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=6120, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=9167, PETRI_PLACES=307, PETRI_TRANSITIONS=657} [2022-01-19 08:07:51,343 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 239 predicate places. [2022-01-19 08:07:51,343 INFO L470 AbstractCegarLoop]: Abstraction has has 307 places, 657 transitions, 9167 flow [2022-01-19 08:07:51,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 55.64705882352941) internal successors, (946), 17 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:51,343 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:07:51,343 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 08:07:51,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-19 08:07:51,544 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 08:07:51,545 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:07:51,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:07:51,545 INFO L85 PathProgramCache]: Analyzing trace with hash 118370099, now seen corresponding path program 6 times [2022-01-19 08:07:51,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:07:51,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134608804] [2022-01-19 08:07:51,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:07:51,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:07:51,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:07:51,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:07:51,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:07:51,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134608804] [2022-01-19 08:07:51,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134608804] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:07:51,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787754474] [2022-01-19 08:07:51,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 08:07:51,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:07:51,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:07:51,616 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 08:07:51,618 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 08:07:51,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-19 08:07:51,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:07:51,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:07:51,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:07:51,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:07:51,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:07:51,982 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:07:51,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787754474] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:07:51,982 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:07:51,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-19 08:07:51,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538546759] [2022-01-19 08:07:51,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:07:51,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-19 08:07:51,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:07:51,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-19 08:07:51,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-01-19 08:07:51,985 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 08:07:51,986 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 657 transitions, 9167 flow. Second operand has 18 states, 18 states have (on average 56.111111111111114) internal successors, (1010), 18 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:51,986 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:07:51,986 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 08:07:51,986 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:07:53,903 INFO L129 PetriNetUnfolder]: 2248/6588 cut-off events. [2022-01-19 08:07:53,904 INFO L130 PetriNetUnfolder]: For 78964/78964 co-relation queries the response was YES. [2022-01-19 08:07:53,945 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38187 conditions, 6588 events. 2248/6588 cut-off events. For 78964/78964 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 65877 event pairs, 239 based on Foata normal form. 19/6586 useless extension candidates. Maximal degree in co-relation 37963. Up to 1340 conditions per place. [2022-01-19 08:07:53,975 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 270 selfloop transitions, 524 changer transitions 3/839 dead transitions. [2022-01-19 08:07:53,976 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 839 transitions, 12797 flow [2022-01-19 08:07:53,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-19 08:07:53,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-01-19 08:07:53,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2368 transitions. [2022-01-19 08:07:53,980 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7500791891035794 [2022-01-19 08:07:53,981 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2368 transitions. [2022-01-19 08:07:53,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2368 transitions. [2022-01-19 08:07:53,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:07:53,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2368 transitions. [2022-01-19 08:07:53,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 57.75609756097561) internal successors, (2368), 41 states have internal predecessors, (2368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:54,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 77.0) internal successors, (3234), 42 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:54,054 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 77.0) internal successors, (3234), 42 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:54,054 INFO L186 Difference]: Start difference. First operand has 307 places, 657 transitions, 9167 flow. Second operand 41 states and 2368 transitions. [2022-01-19 08:07:54,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 839 transitions, 12797 flow [2022-01-19 08:07:54,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 839 transitions, 12160 flow, removed 210 selfloop flow, removed 3 redundant places. [2022-01-19 08:07:54,721 INFO L242 Difference]: Finished difference. Result has 352 places, 723 transitions, 11195 flow [2022-01-19 08:07:54,722 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=8649, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=459, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=11195, PETRI_PLACES=352, PETRI_TRANSITIONS=723} [2022-01-19 08:07:54,722 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 284 predicate places. [2022-01-19 08:07:54,722 INFO L470 AbstractCegarLoop]: Abstraction has has 352 places, 723 transitions, 11195 flow [2022-01-19 08:07:54,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.111111111111114) internal successors, (1010), 18 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:54,723 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:07:54,724 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 08:07:54,741 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 08:07:54,932 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 08:07:54,932 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:07:54,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:07:54,932 INFO L85 PathProgramCache]: Analyzing trace with hash -151736549, now seen corresponding path program 7 times [2022-01-19 08:07:54,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:07:54,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684103031] [2022-01-19 08:07:54,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:07:54,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:07:54,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:07:55,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:07:55,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:07:55,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684103031] [2022-01-19 08:07:55,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684103031] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:07:55,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33754318] [2022-01-19 08:07:55,004 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 08:07:55,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:07:55,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:07:55,008 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 08:07:55,023 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 08:07:55,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:07:55,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:07:55,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:07:55,228 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:07:55,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:07:55,346 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:07:55,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33754318] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:07:55,347 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:07:55,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-19 08:07:55,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122402877] [2022-01-19 08:07:55,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:07:55,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-19 08:07:55,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:07:55,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-19 08:07:55,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-01-19 08:07:55,349 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 08:07:55,350 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 723 transitions, 11195 flow. Second operand has 17 states, 17 states have (on average 55.76470588235294) internal successors, (948), 17 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:55,350 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:07:55,350 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 08:07:55,350 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:07:57,703 INFO L129 PetriNetUnfolder]: 2315/6806 cut-off events. [2022-01-19 08:07:57,703 INFO L130 PetriNetUnfolder]: For 94421/94421 co-relation queries the response was YES. [2022-01-19 08:07:57,744 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40883 conditions, 6806 events. 2315/6806 cut-off events. For 94421/94421 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 68521 event pairs, 234 based on Foata normal form. 31/6802 useless extension candidates. Maximal degree in co-relation 40646. Up to 1016 conditions per place. [2022-01-19 08:07:57,773 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 328 selfloop transitions, 568 changer transitions 28/966 dead transitions. [2022-01-19 08:07:57,773 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 966 transitions, 15569 flow [2022-01-19 08:07:57,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-19 08:07:57,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-01-19 08:07:57,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 3914 transitions. [2022-01-19 08:07:57,778 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7475171886936592 [2022-01-19 08:07:57,778 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 3914 transitions. [2022-01-19 08:07:57,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 3914 transitions. [2022-01-19 08:07:57,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:07:57,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 3914 transitions. [2022-01-19 08:07:57,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 57.55882352941177) internal successors, (3914), 68 states have internal predecessors, (3914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:57,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 77.0) internal successors, (5313), 69 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:57,792 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 77.0) internal successors, (5313), 69 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:57,792 INFO L186 Difference]: Start difference. First operand has 352 places, 723 transitions, 11195 flow. Second operand 68 states and 3914 transitions. [2022-01-19 08:07:57,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 966 transitions, 15569 flow [2022-01-19 08:07:58,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 966 transitions, 15038 flow, removed 83 selfloop flow, removed 25 redundant places. [2022-01-19 08:07:58,513 INFO L242 Difference]: Finished difference. Result has 403 places, 772 transitions, 13155 flow [2022-01-19 08:07:58,514 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=10686, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=515, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=13155, PETRI_PLACES=403, PETRI_TRANSITIONS=772} [2022-01-19 08:07:58,514 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 335 predicate places. [2022-01-19 08:07:58,514 INFO L470 AbstractCegarLoop]: Abstraction has has 403 places, 772 transitions, 13155 flow [2022-01-19 08:07:58,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 55.76470588235294) internal successors, (948), 17 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:58,515 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:07:58,515 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 08:07:58,530 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 08:07:58,715 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 08:07:58,715 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:07:58,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:07:58,716 INFO L85 PathProgramCache]: Analyzing trace with hash -981160703, now seen corresponding path program 8 times [2022-01-19 08:07:58,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:07:58,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793608086] [2022-01-19 08:07:58,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:07:58,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:07:58,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:07:58,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:07:58,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:07:58,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793608086] [2022-01-19 08:07:58,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793608086] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:07:58,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925824998] [2022-01-19 08:07:58,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:07:58,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:07:58,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:07:58,789 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 08:07:58,790 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 08:07:58,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:07:58,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:07:58,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:07:58,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:07:59,026 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:07:59,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:07:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:07:59,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925824998] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:07:59,228 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:07:59,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-19 08:07:59,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678675425] [2022-01-19 08:07:59,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:07:59,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-19 08:07:59,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:07:59,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-19 08:07:59,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-01-19 08:07:59,231 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 08:07:59,231 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 772 transitions, 13155 flow. Second operand has 20 states, 20 states have (on average 55.4) internal successors, (1108), 20 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:59,231 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:07:59,231 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 08:07:59,232 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:08:00,956 INFO L129 PetriNetUnfolder]: 2327/6841 cut-off events. [2022-01-19 08:08:00,956 INFO L130 PetriNetUnfolder]: For 108630/108630 co-relation queries the response was YES. [2022-01-19 08:08:01,009 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43399 conditions, 6841 events. 2327/6841 cut-off events. For 108630/108630 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 68847 event pairs, 657 based on Foata normal form. 1/6744 useless extension candidates. Maximal degree in co-relation 43150. Up to 2226 conditions per place. [2022-01-19 08:08:01,045 INFO L132 encePairwiseOnDemand]: 66/77 looper letters, 549 selfloop transitions, 245 changer transitions 8/844 dead transitions. [2022-01-19 08:08:01,045 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 844 transitions, 15539 flow [2022-01-19 08:08:01,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-19 08:08:01,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-01-19 08:08:01,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1386 transitions. [2022-01-19 08:08:01,048 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.75 [2022-01-19 08:08:01,048 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1386 transitions. [2022-01-19 08:08:01,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1386 transitions. [2022-01-19 08:08:01,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:08:01,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1386 transitions. [2022-01-19 08:08:01,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 57.75) internal successors, (1386), 24 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:08:01,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 77.0) internal successors, (1925), 25 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:08:01,053 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 77.0) internal successors, (1925), 25 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:08:01,053 INFO L186 Difference]: Start difference. First operand has 403 places, 772 transitions, 13155 flow. Second operand 24 states and 1386 transitions. [2022-01-19 08:08:01,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 844 transitions, 15539 flow [2022-01-19 08:08:01,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 844 transitions, 15071 flow, removed 76 selfloop flow, removed 30 redundant places. [2022-01-19 08:08:01,948 INFO L242 Difference]: Finished difference. Result has 405 places, 791 transitions, 13538 flow [2022-01-19 08:08:01,949 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=12707, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=772, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=13538, PETRI_PLACES=405, PETRI_TRANSITIONS=791} [2022-01-19 08:08:01,949 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 337 predicate places. [2022-01-19 08:08:01,949 INFO L470 AbstractCegarLoop]: Abstraction has has 405 places, 791 transitions, 13538 flow [2022-01-19 08:08:01,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 55.4) internal successors, (1108), 20 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:08:01,950 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:08:01,950 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 08:08:01,974 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 08:08:02,171 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 08:08:02,171 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:08:02,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:08:02,172 INFO L85 PathProgramCache]: Analyzing trace with hash 331168385, now seen corresponding path program 9 times [2022-01-19 08:08:02,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:08:02,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785918138] [2022-01-19 08:08:02,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:08:02,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:08:02,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:08:02,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:08:02,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:08:02,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785918138] [2022-01-19 08:08:02,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785918138] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:08:02,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626604536] [2022-01-19 08:08:02,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 08:08:02,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:08:02,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:08:02,245 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 08:08:02,247 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 08:08:02,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 08:08:02,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:08:02,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:08:02,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:08:02,450 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:08:02,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:08:02,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:08:02,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626604536] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:08:02,561 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:08:02,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 08:08:02,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370436841] [2022-01-19 08:08:02,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:08:02,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 08:08:02,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:08:02,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 08:08:02,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-01-19 08:08:02,563 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 08:08:02,564 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 791 transitions, 13538 flow. Second operand has 19 states, 19 states have (on average 55.68421052631579) internal successors, (1058), 19 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:08:02,564 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:08:02,564 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 08:08:02,564 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:08:06,013 INFO L129 PetriNetUnfolder]: 3673/10200 cut-off events. [2022-01-19 08:08:06,013 INFO L130 PetriNetUnfolder]: For 187722/187722 co-relation queries the response was YES. [2022-01-19 08:08:06,085 INFO L84 FinitePrefix]: Finished finitePrefix Result has 68587 conditions, 10200 events. 3673/10200 cut-off events. For 187722/187722 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 107773 event pairs, 564 based on Foata normal form. 30/10127 useless extension candidates. Maximal degree in co-relation 68395. Up to 1978 conditions per place. [2022-01-19 08:08:06,119 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 488 selfloop transitions, 889 changer transitions 17/1436 dead transitions. [2022-01-19 08:08:06,119 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 1436 transitions, 27257 flow [2022-01-19 08:08:06,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-19 08:08:06,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-01-19 08:08:06,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 3930 transitions. [2022-01-19 08:08:06,124 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7396950875211745 [2022-01-19 08:08:06,124 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 3930 transitions. [2022-01-19 08:08:06,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 3930 transitions. [2022-01-19 08:08:06,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:08:06,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 3930 transitions. [2022-01-19 08:08:06,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 56.95652173913044) internal successors, (3930), 69 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:08:06,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 77.0) internal successors, (5390), 70 states have internal predecessors, (5390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:08:06,142 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 77.0) internal successors, (5390), 70 states have internal predecessors, (5390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:08:06,143 INFO L186 Difference]: Start difference. First operand has 405 places, 791 transitions, 13538 flow. Second operand 69 states and 3930 transitions. [2022-01-19 08:08:06,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 1436 transitions, 27257 flow [2022-01-19 08:08:07,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 1436 transitions, 26808 flow, removed 20 selfloop flow, removed 4 redundant places. [2022-01-19 08:08:07,429 INFO L242 Difference]: Finished difference. Result has 485 places, 1194 transitions, 24458 flow [2022-01-19 08:08:07,429 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=13291, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=791, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=505, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=24458, PETRI_PLACES=485, PETRI_TRANSITIONS=1194} [2022-01-19 08:08:07,430 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 417 predicate places. [2022-01-19 08:08:07,430 INFO L470 AbstractCegarLoop]: Abstraction has has 485 places, 1194 transitions, 24458 flow [2022-01-19 08:08:07,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.68421052631579) internal successors, (1058), 19 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:08:07,430 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:08:07,431 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 08:08:07,458 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 08:08:07,643 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 08:08:07,643 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:08:07,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:08:07,644 INFO L85 PathProgramCache]: Analyzing trace with hash -838217509, now seen corresponding path program 10 times [2022-01-19 08:08:07,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:08:07,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722622679] [2022-01-19 08:08:07,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:08:07,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:08:07,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:08:07,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:08:07,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:08:07,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722622679] [2022-01-19 08:08:07,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722622679] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:08:07,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303663977] [2022-01-19 08:08:07,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 08:08:07,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:08:07,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:08:07,714 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 08:08:07,718 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 08:08:07,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 08:08:07,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:08:07,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:08:07,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:08:07,934 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:08:07,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:08:08,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:08:08,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303663977] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:08:08,057 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:08:08,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 08:08:08,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506333851] [2022-01-19 08:08:08,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:08:08,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 08:08:08,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:08:08,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 08:08:08,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-01-19 08:08:08,059 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 08:08:08,059 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 1194 transitions, 24458 flow. Second operand has 19 states, 19 states have (on average 55.73684210526316) internal successors, (1059), 19 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:08:08,060 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:08:08,060 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 08:08:08,060 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:08:14,773 INFO L129 PetriNetUnfolder]: 6250/17016 cut-off events. [2022-01-19 08:08:14,774 INFO L130 PetriNetUnfolder]: For 440564/440564 co-relation queries the response was YES. [2022-01-19 08:08:14,948 INFO L84 FinitePrefix]: Finished finitePrefix Result has 130530 conditions, 17016 events. 6250/17016 cut-off events. For 440564/440564 co-relation queries the response was YES. Maximal size of possible extension queue 1179. Compared 195108 event pairs, 817 based on Foata normal form. 45/16917 useless extension candidates. Maximal degree in co-relation 129212. Up to 2737 conditions per place. [2022-01-19 08:08:15,032 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 663 selfloop transitions, 1697 changer transitions 31/2433 dead transitions. [2022-01-19 08:08:15,032 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 570 places, 2433 transitions, 54424 flow [2022-01-19 08:08:15,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-19 08:08:15,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2022-01-19 08:08:15,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 4916 transitions. [2022-01-19 08:08:15,048 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7423739051646029 [2022-01-19 08:08:15,048 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 4916 transitions. [2022-01-19 08:08:15,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 4916 transitions. [2022-01-19 08:08:15,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:08:15,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 4916 transitions. [2022-01-19 08:08:15,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 57.16279069767442) internal successors, (4916), 86 states have internal predecessors, (4916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:08:15,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 77.0) internal successors, (6699), 87 states have internal predecessors, (6699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:08:15,062 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 77.0) internal successors, (6699), 87 states have internal predecessors, (6699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:08:15,062 INFO L186 Difference]: Start difference. First operand has 485 places, 1194 transitions, 24458 flow. Second operand 86 states and 4916 transitions. [2022-01-19 08:08:15,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 570 places, 2433 transitions, 54424 flow [2022-01-19 08:08:20,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 2433 transitions, 53393 flow, removed 77 selfloop flow, removed 36 redundant places. [2022-01-19 08:08:20,233 INFO L242 Difference]: Finished difference. Result has 556 places, 2081 transitions, 50135 flow [2022-01-19 08:08:20,234 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=23792, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=865, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=50135, PETRI_PLACES=556, PETRI_TRANSITIONS=2081} [2022-01-19 08:08:20,234 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 488 predicate places. [2022-01-19 08:08:20,235 INFO L470 AbstractCegarLoop]: Abstraction has has 556 places, 2081 transitions, 50135 flow [2022-01-19 08:08:20,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.73684210526316) internal successors, (1059), 19 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:08:20,235 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:08:20,235 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 08:08:20,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-19 08:08:20,443 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 08:08:20,443 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:08:20,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:08:20,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1400475587, now seen corresponding path program 11 times [2022-01-19 08:08:20,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:08:20,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246099033] [2022-01-19 08:08:20,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:08:20,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:08:20,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:08:20,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:08:20,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:08:20,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246099033] [2022-01-19 08:08:20,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246099033] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:08:20,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087537167] [2022-01-19 08:08:20,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 08:08:20,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:08:20,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:08:20,507 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 08:08:20,508 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 08:08:20,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-19 08:08:20,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:08:20,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:08:20,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:08:20,699 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:08:20,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:08:20,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:08:20,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087537167] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:08:20,796 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:08:20,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 08:08:20,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124559817] [2022-01-19 08:08:20,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:08:20,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 08:08:20,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:08:20,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 08:08:20,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-01-19 08:08:20,797 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 08:08:20,798 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 2081 transitions, 50135 flow. Second operand has 19 states, 19 states have (on average 55.421052631578945) internal successors, (1053), 19 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:08:20,798 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:08:20,798 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 08:08:20,798 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:08:30,537 INFO L129 PetriNetUnfolder]: 6307/17364 cut-off events. [2022-01-19 08:08:30,538 INFO L130 PetriNetUnfolder]: For 577168/577168 co-relation queries the response was YES. [2022-01-19 08:08:30,695 INFO L84 FinitePrefix]: Finished finitePrefix Result has 146449 conditions, 17364 events. 6307/17364 cut-off events. For 577168/577168 co-relation queries the response was YES. Maximal size of possible extension queue 1217. Compared 201459 event pairs, 839 based on Foata normal form. 7/17209 useless extension candidates. Maximal degree in co-relation 145139. Up to 3276 conditions per place. [2022-01-19 08:08:30,766 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 989 selfloop transitions, 1260 changer transitions 18/2309 dead transitions. [2022-01-19 08:08:30,766 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 605 places, 2309 transitions, 58283 flow [2022-01-19 08:08:30,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-19 08:08:30,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-01-19 08:08:30,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2887 transitions. [2022-01-19 08:08:30,769 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7498701298701299 [2022-01-19 08:08:30,769 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2887 transitions. [2022-01-19 08:08:30,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2887 transitions. [2022-01-19 08:08:30,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:08:30,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2887 transitions. [2022-01-19 08:08:30,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 57.74) internal successors, (2887), 50 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:08:30,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 77.0) internal successors, (3927), 51 states have internal predecessors, (3927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:08:30,776 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 77.0) internal successors, (3927), 51 states have internal predecessors, (3927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:08:30,776 INFO L186 Difference]: Start difference. First operand has 556 places, 2081 transitions, 50135 flow. Second operand 50 states and 2887 transitions. [2022-01-19 08:08:30,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 605 places, 2309 transitions, 58283 flow [2022-01-19 08:08:38,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 2309 transitions, 57719 flow, removed 177 selfloop flow, removed 35 redundant places. [2022-01-19 08:08:38,174 INFO L242 Difference]: Finished difference. Result has 577 places, 2117 transitions, 53869 flow [2022-01-19 08:08:38,176 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=49633, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2081, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=843, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=53869, PETRI_PLACES=577, PETRI_TRANSITIONS=2117} [2022-01-19 08:08:38,176 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 509 predicate places. [2022-01-19 08:08:38,176 INFO L470 AbstractCegarLoop]: Abstraction has has 577 places, 2117 transitions, 53869 flow [2022-01-19 08:08:38,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.421052631578945) internal successors, (1053), 19 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:08:38,177 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:08:38,177 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 08:08:38,199 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 08:08:38,391 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 08:08:38,391 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:08:38,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:08:38,392 INFO L85 PathProgramCache]: Analyzing trace with hash -757615803, now seen corresponding path program 12 times [2022-01-19 08:08:38,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:08:38,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344916509] [2022-01-19 08:08:38,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:08:38,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:08:38,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:08:38,458 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:08:38,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:08:38,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344916509] [2022-01-19 08:08:38,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344916509] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:08:38,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177389783] [2022-01-19 08:08:38,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 08:08:38,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:08:38,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:08:38,459 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 08:08:38,460 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 08:08:38,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-19 08:08:38,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:08:38,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:08:38,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:08:38,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:08:38,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:08:38,743 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:08:38,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177389783] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:08:38,743 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:08:38,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 08:08:38,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258553987] [2022-01-19 08:08:38,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:08:38,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 08:08:38,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:08:38,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 08:08:38,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-01-19 08:08:38,745 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 08:08:38,745 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 577 places, 2117 transitions, 53869 flow. Second operand has 19 states, 19 states have (on average 55.421052631578945) internal successors, (1053), 19 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:08:38,745 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:08:38,745 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 08:08:38,745 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:08:48,655 INFO L129 PetriNetUnfolder]: 6367/17760 cut-off events. [2022-01-19 08:08:48,655 INFO L130 PetriNetUnfolder]: For 657194/657194 co-relation queries the response was YES. [2022-01-19 08:08:48,859 INFO L84 FinitePrefix]: Finished finitePrefix Result has 154486 conditions, 17760 events. 6367/17760 cut-off events. For 657194/657194 co-relation queries the response was YES. Maximal size of possible extension queue 1240. Compared 208434 event pairs, 926 based on Foata normal form. 8/17584 useless extension candidates. Maximal degree in co-relation 153213. Up to 2429 conditions per place. [2022-01-19 08:08:48,951 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 914 selfloop transitions, 1481 changer transitions 11/2448 dead transitions. [2022-01-19 08:08:48,951 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 643 places, 2448 transitions, 64426 flow [2022-01-19 08:08:48,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-19 08:08:48,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-01-19 08:08:48,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 4016 transitions. [2022-01-19 08:08:48,955 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7450834879406308 [2022-01-19 08:08:48,955 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 4016 transitions. [2022-01-19 08:08:48,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 4016 transitions. [2022-01-19 08:08:48,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:08:48,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 4016 transitions. [2022-01-19 08:08:48,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 57.371428571428574) internal successors, (4016), 70 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:08:48,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 77.0) internal successors, (5467), 71 states have internal predecessors, (5467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:08:48,967 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 77.0) internal successors, (5467), 71 states have internal predecessors, (5467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:08:48,967 INFO L186 Difference]: Start difference. First operand has 577 places, 2117 transitions, 53869 flow. Second operand 70 states and 4016 transitions. [2022-01-19 08:08:48,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 643 places, 2448 transitions, 64426 flow [2022-01-19 08:08:56,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 603 places, 2448 transitions, 62811 flow, removed 70 selfloop flow, removed 40 redundant places. [2022-01-19 08:08:56,750 INFO L242 Difference]: Finished difference. Result has 611 places, 2226 transitions, 58861 flow [2022-01-19 08:08:56,752 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=52306, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1373, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=722, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=58861, PETRI_PLACES=611, PETRI_TRANSITIONS=2226} [2022-01-19 08:08:56,752 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 543 predicate places. [2022-01-19 08:08:56,752 INFO L470 AbstractCegarLoop]: Abstraction has has 611 places, 2226 transitions, 58861 flow [2022-01-19 08:08:56,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.421052631578945) internal successors, (1053), 19 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:08:56,753 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:08:56,753 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 08:08:56,775 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 08:08:56,975 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 08:08:56,975 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:08:56,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:08:56,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1424025787, now seen corresponding path program 13 times [2022-01-19 08:08:56,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:08:56,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233692211] [2022-01-19 08:08:56,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:08:56,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:08:56,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:08:57,035 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:08:57,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:08:57,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233692211] [2022-01-19 08:08:57,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233692211] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:08:57,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998320844] [2022-01-19 08:08:57,035 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 08:08:57,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:08:57,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:08:57,036 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:08:57,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-19 08:08:57,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:08:57,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:08:57,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:08:57,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:08:57,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:08:57,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:08:57,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998320844] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:08:57,344 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:08:57,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-19 08:08:57,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100536150] [2022-01-19 08:08:57,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:08:57,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-19 08:08:57,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:08:57,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-19 08:08:57,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-01-19 08:08:57,346 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 08:08:57,347 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 611 places, 2226 transitions, 58861 flow. Second operand has 21 states, 21 states have (on average 55.285714285714285) internal successors, (1161), 21 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:08:57,347 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:08:57,347 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 08:08:57,347 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:09:06,993 INFO L129 PetriNetUnfolder]: 6368/17596 cut-off events. [2022-01-19 08:09:06,999 INFO L130 PetriNetUnfolder]: For 711572/711572 co-relation queries the response was YES. [2022-01-19 08:09:07,185 INFO L84 FinitePrefix]: Finished finitePrefix Result has 160161 conditions, 17596 events. 6368/17596 cut-off events. For 711572/711572 co-relation queries the response was YES. Maximal size of possible extension queue 1208. Compared 205659 event pairs, 955 based on Foata normal form. 1/17400 useless extension candidates. Maximal degree in co-relation 159996. Up to 8449 conditions per place. [2022-01-19 08:09:07,261 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 1813 selfloop transitions, 407 changer transitions 9/2271 dead transitions. [2022-01-19 08:09:07,261 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 625 places, 2271 transitions, 64154 flow [2022-01-19 08:09:07,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-19 08:09:07,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-01-19 08:09:07,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 924 transitions. [2022-01-19 08:09:07,262 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.75 [2022-01-19 08:09:07,262 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 924 transitions. [2022-01-19 08:09:07,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 924 transitions. [2022-01-19 08:09:07,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:09:07,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 924 transitions. [2022-01-19 08:09:07,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 57.75) internal successors, (924), 16 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:07,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 77.0) internal successors, (1309), 17 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:07,265 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 77.0) internal successors, (1309), 17 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:07,265 INFO L186 Difference]: Start difference. First operand has 611 places, 2226 transitions, 58861 flow. Second operand 16 states and 924 transitions. [2022-01-19 08:09:07,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 625 places, 2271 transitions, 64154 flow [2022-01-19 08:09:15,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 578 places, 2271 transitions, 62513 flow, removed 128 selfloop flow, removed 47 redundant places. [2022-01-19 08:09:15,705 INFO L242 Difference]: Finished difference. Result has 583 places, 2240 transitions, 58592 flow [2022-01-19 08:09:15,706 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=57235, PETRI_DIFFERENCE_MINUEND_PLACES=563, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=393, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1827, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=58592, PETRI_PLACES=583, PETRI_TRANSITIONS=2240} [2022-01-19 08:09:15,706 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 515 predicate places. [2022-01-19 08:09:15,706 INFO L470 AbstractCegarLoop]: Abstraction has has 583 places, 2240 transitions, 58592 flow [2022-01-19 08:09:15,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 55.285714285714285) internal successors, (1161), 21 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:15,706 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:09:15,706 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 08:09:15,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-19 08:09:15,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:09:15,907 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:09:15,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:09:15,907 INFO L85 PathProgramCache]: Analyzing trace with hash 339136801, now seen corresponding path program 14 times [2022-01-19 08:09:15,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:09:15,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088828468] [2022-01-19 08:09:15,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:09:15,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:09:15,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:09:15,968 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:09:15,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:09:15,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088828468] [2022-01-19 08:09:15,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088828468] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:09:15,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182056469] [2022-01-19 08:09:15,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:09:15,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:09:15,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:09:15,970 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:09:15,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-19 08:09:16,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:09:16,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:09:16,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:09:16,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:09:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:09:16,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:09:16,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 08:09:16,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182056469] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:09:16,259 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:09:16,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-01-19 08:09:16,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424930889] [2022-01-19 08:09:16,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:09:16,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 08:09:16,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:09:16,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 08:09:16,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-01-19 08:09:16,260 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 08:09:16,260 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 2240 transitions, 58592 flow. Second operand has 19 states, 19 states have (on average 55.473684210526315) internal successors, (1054), 19 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:16,260 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:09:16,260 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 08:09:16,260 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:09:26,652 INFO L129 PetriNetUnfolder]: 6406/17823 cut-off events. [2022-01-19 08:09:26,652 INFO L130 PetriNetUnfolder]: For 708401/708401 co-relation queries the response was YES. [2022-01-19 08:09:26,840 INFO L84 FinitePrefix]: Finished finitePrefix Result has 160563 conditions, 17823 events. 6406/17823 cut-off events. For 708401/708401 co-relation queries the response was YES. Maximal size of possible extension queue 1213. Compared 208863 event pairs, 698 based on Foata normal form. 4/17650 useless extension candidates. Maximal degree in co-relation 160164. Up to 5201 conditions per place. [2022-01-19 08:09:26,917 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 1501 selfloop transitions, 881 changer transitions 20/2444 dead transitions. [2022-01-19 08:09:26,917 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 635 places, 2444 transitions, 67162 flow [2022-01-19 08:09:26,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-19 08:09:26,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2022-01-19 08:09:26,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 3254 transitions. [2022-01-19 08:09:26,919 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7546382189239332 [2022-01-19 08:09:26,919 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 3254 transitions. [2022-01-19 08:09:26,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 3254 transitions. [2022-01-19 08:09:26,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:09:26,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 3254 transitions. [2022-01-19 08:09:26,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 58.107142857142854) internal successors, (3254), 56 states have internal predecessors, (3254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:26,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 77.0) internal successors, (4389), 57 states have internal predecessors, (4389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:26,927 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 77.0) internal successors, (4389), 57 states have internal predecessors, (4389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:26,927 INFO L186 Difference]: Start difference. First operand has 583 places, 2240 transitions, 58592 flow. Second operand 56 states and 3254 transitions. [2022-01-19 08:09:26,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 635 places, 2444 transitions, 67162 flow [2022-01-19 08:09:35,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 628 places, 2444 transitions, 66706 flow, removed 92 selfloop flow, removed 7 redundant places. [2022-01-19 08:09:35,674 INFO L242 Difference]: Finished difference. Result has 638 places, 2295 transitions, 61914 flow [2022-01-19 08:09:35,675 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=58276, PETRI_DIFFERENCE_MINUEND_PLACES=573, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=829, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=61914, PETRI_PLACES=638, PETRI_TRANSITIONS=2295} [2022-01-19 08:09:35,676 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 570 predicate places. [2022-01-19 08:09:35,676 INFO L470 AbstractCegarLoop]: Abstraction has has 638 places, 2295 transitions, 61914 flow [2022-01-19 08:09:35,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.473684210526315) internal successors, (1054), 19 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:35,676 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:09:35,676 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 08:09:35,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-01-19 08:09:35,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:09:35,877 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:09:35,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:09:35,877 INFO L85 PathProgramCache]: Analyzing trace with hash 617201733, now seen corresponding path program 15 times [2022-01-19 08:09:35,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:09:35,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172808497] [2022-01-19 08:09:35,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:09:35,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:09:35,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:09:35,944 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:09:35,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:09:35,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172808497] [2022-01-19 08:09:35,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172808497] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:09:35,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127106464] [2022-01-19 08:09:35,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 08:09:35,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:09:35,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:09:35,948 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:09:35,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-19 08:09:36,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-19 08:09:36,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:09:36,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:09:36,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:09:36,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:09:36,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:09:36,303 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:09:36,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127106464] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:09:36,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:09:36,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-19 08:09:36,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158286752] [2022-01-19 08:09:36,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:09:36,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-19 08:09:36,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:09:36,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-19 08:09:36,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-01-19 08:09:36,304 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 08:09:36,305 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 638 places, 2295 transitions, 61914 flow. Second operand has 21 states, 21 states have (on average 55.285714285714285) internal successors, (1161), 21 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:36,305 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:09:36,305 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 08:09:36,305 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:09:48,107 INFO L129 PetriNetUnfolder]: 7177/20000 cut-off events. [2022-01-19 08:09:48,107 INFO L130 PetriNetUnfolder]: For 876012/876012 co-relation queries the response was YES. [2022-01-19 08:09:48,333 INFO L84 FinitePrefix]: Finished finitePrefix Result has 186455 conditions, 20000 events. 7177/20000 cut-off events. For 876012/876012 co-relation queries the response was YES. Maximal size of possible extension queue 1386. Compared 239019 event pairs, 1065 based on Foata normal form. 4/19773 useless extension candidates. Maximal degree in co-relation 185993. Up to 7493 conditions per place. [2022-01-19 08:09:48,421 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 1956 selfloop transitions, 724 changer transitions 17/2739 dead transitions. [2022-01-19 08:09:48,421 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 680 places, 2739 transitions, 77619 flow [2022-01-19 08:09:48,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-19 08:09:48,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-01-19 08:09:48,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2607 transitions. [2022-01-19 08:09:48,423 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7523809523809524 [2022-01-19 08:09:48,423 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2607 transitions. [2022-01-19 08:09:48,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2607 transitions. [2022-01-19 08:09:48,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:09:48,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2607 transitions. [2022-01-19 08:09:48,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 57.93333333333333) internal successors, (2607), 45 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:48,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 77.0) internal successors, (3542), 46 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:48,429 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 77.0) internal successors, (3542), 46 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:48,429 INFO L186 Difference]: Start difference. First operand has 638 places, 2295 transitions, 61914 flow. Second operand 45 states and 2607 transitions. [2022-01-19 08:09:48,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 680 places, 2739 transitions, 77619 flow [2022-01-19 08:10:00,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 649 places, 2739 transitions, 75662 flow, removed 215 selfloop flow, removed 31 redundant places. [2022-01-19 08:10:00,137 INFO L242 Difference]: Finished difference. Result has 666 places, 2438 transitions, 66686 flow [2022-01-19 08:10:00,138 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=60340, PETRI_DIFFERENCE_MINUEND_PLACES=605, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=588, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=66686, PETRI_PLACES=666, PETRI_TRANSITIONS=2438} [2022-01-19 08:10:00,139 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 598 predicate places. [2022-01-19 08:10:00,139 INFO L470 AbstractCegarLoop]: Abstraction has has 666 places, 2438 transitions, 66686 flow [2022-01-19 08:10:00,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 55.285714285714285) internal successors, (1161), 21 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:10:00,139 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:10:00,139 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 08:10:00,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-19 08:10:00,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:10:00,339 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:10:00,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:10:00,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1816268871, now seen corresponding path program 16 times [2022-01-19 08:10:00,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:10:00,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779259876] [2022-01-19 08:10:00,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:10:00,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:10:00,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:10:00,450 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:10:00,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:10:00,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779259876] [2022-01-19 08:10:00,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779259876] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:10:00,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834322454] [2022-01-19 08:10:00,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 08:10:00,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:10:00,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:10:00,451 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:10:00,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-19 08:10:00,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 08:10:00,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:10:00,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:10:00,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:10:00,683 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:10:00,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:10:00,800 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:10:00,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834322454] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:10:00,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:10:00,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-19 08:10:00,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134796847] [2022-01-19 08:10:00,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:10:00,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-19 08:10:00,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:10:00,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-19 08:10:00,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-01-19 08:10:00,802 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 08:10:00,803 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 666 places, 2438 transitions, 66686 flow. Second operand has 21 states, 21 states have (on average 55.333333333333336) internal successors, (1162), 21 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:10:00,803 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:10:00,803 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 08:10:00,803 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:10:16,534 INFO L129 PetriNetUnfolder]: 9033/24951 cut-off events. [2022-01-19 08:10:16,534 INFO L130 PetriNetUnfolder]: For 1173886/1173886 co-relation queries the response was YES. [2022-01-19 08:10:16,872 INFO L84 FinitePrefix]: Finished finitePrefix Result has 235337 conditions, 24951 events. 9033/24951 cut-off events. For 1173886/1173886 co-relation queries the response was YES. Maximal size of possible extension queue 1804. Compared 308322 event pairs, 1077 based on Foata normal form. 4/24724 useless extension candidates. Maximal degree in co-relation 234860. Up to 7844 conditions per place. [2022-01-19 08:10:16,991 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 1940 selfloop transitions, 1296 changer transitions 11/3289 dead transitions. [2022-01-19 08:10:16,991 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 732 places, 3289 transitions, 94651 flow [2022-01-19 08:10:16,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-19 08:10:16,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-01-19 08:10:16,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 4006 transitions. [2022-01-19 08:10:16,993 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7432282003710575 [2022-01-19 08:10:16,994 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 4006 transitions. [2022-01-19 08:10:16,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 4006 transitions. [2022-01-19 08:10:16,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:10:16,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 4006 transitions. [2022-01-19 08:10:16,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 57.22857142857143) internal successors, (4006), 70 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:10:17,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 77.0) internal successors, (5467), 71 states have internal predecessors, (5467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:10:17,001 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 77.0) internal successors, (5467), 71 states have internal predecessors, (5467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:10:17,001 INFO L186 Difference]: Start difference. First operand has 666 places, 2438 transitions, 66686 flow. Second operand 70 states and 4006 transitions. [2022-01-19 08:10:17,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 732 places, 3289 transitions, 94651 flow [2022-01-19 08:10:35,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 720 places, 3289 transitions, 94037 flow, removed 187 selfloop flow, removed 12 redundant places. [2022-01-19 08:10:36,025 INFO L242 Difference]: Finished difference. Result has 754 places, 2969 transitions, 85512 flow [2022-01-19 08:10:36,026 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=66202, PETRI_DIFFERENCE_MINUEND_PLACES=651, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=831, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=85512, PETRI_PLACES=754, PETRI_TRANSITIONS=2969} [2022-01-19 08:10:36,026 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 686 predicate places. [2022-01-19 08:10:36,026 INFO L470 AbstractCegarLoop]: Abstraction has has 754 places, 2969 transitions, 85512 flow [2022-01-19 08:10:36,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 55.333333333333336) internal successors, (1162), 21 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:10:36,027 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:10:36,027 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 08:10:36,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-19 08:10:36,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:10:36,227 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:10:36,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:10:36,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1462038993, now seen corresponding path program 17 times [2022-01-19 08:10:36,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:10:36,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880980731] [2022-01-19 08:10:36,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:10:36,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:10:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:10:36,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:10:36,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:10:36,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880980731] [2022-01-19 08:10:36,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880980731] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:10:36,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300384623] [2022-01-19 08:10:36,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 08:10:36,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:10:36,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:10:36,304 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:10:36,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-19 08:10:36,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-19 08:10:36,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:10:36,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:10:36,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:10:36,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:10:36,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:10:36,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:10:36,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300384623] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:10:36,625 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:10:36,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-19 08:10:36,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224322761] [2022-01-19 08:10:36,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:10:36,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-19 08:10:36,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:10:36,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-19 08:10:36,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-19 08:10:36,627 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 08:10:36,628 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 754 places, 2969 transitions, 85512 flow. Second operand has 21 states, 21 states have (on average 55.285714285714285) internal successors, (1161), 21 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:10:36,628 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:10:36,628 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 08:10:36,628 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:10:56,845 INFO L129 PetriNetUnfolder]: 9375/26060 cut-off events. [2022-01-19 08:10:56,846 INFO L130 PetriNetUnfolder]: For 1390331/1390331 co-relation queries the response was YES. [2022-01-19 08:10:57,265 INFO L84 FinitePrefix]: Finished finitePrefix Result has 258164 conditions, 26060 events. 9375/26060 cut-off events. For 1390331/1390331 co-relation queries the response was YES. Maximal size of possible extension queue 1849. Compared 322666 event pairs, 852 based on Foata normal form. 4/25841 useless extension candidates. Maximal degree in co-relation 257750. Up to 6346 conditions per place. [2022-01-19 08:10:57,388 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 1731 selfloop transitions, 1549 changer transitions 16/3338 dead transitions. [2022-01-19 08:10:57,388 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 817 places, 3338 transitions, 100017 flow [2022-01-19 08:10:57,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-19 08:10:57,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2022-01-19 08:10:57,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 3869 transitions. [2022-01-19 08:10:57,390 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7499515409963171 [2022-01-19 08:10:57,390 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 3869 transitions. [2022-01-19 08:10:57,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 3869 transitions. [2022-01-19 08:10:57,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:10:57,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 3869 transitions. [2022-01-19 08:10:57,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 57.74626865671642) internal successors, (3869), 67 states have internal predecessors, (3869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:10:57,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 77.0) internal successors, (5236), 68 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:10:57,397 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 77.0) internal successors, (5236), 68 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:10:57,397 INFO L186 Difference]: Start difference. First operand has 754 places, 2969 transitions, 85512 flow. Second operand 67 states and 3869 transitions. [2022-01-19 08:10:57,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 817 places, 3338 transitions, 100017 flow [2022-01-19 08:11:22,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 797 places, 3338 transitions, 98882 flow, removed 374 selfloop flow, removed 20 redundant places. [2022-01-19 08:11:22,188 INFO L242 Difference]: Finished difference. Result has 822 places, 3127 transitions, 93897 flow [2022-01-19 08:11:22,190 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=84544, PETRI_DIFFERENCE_MINUEND_PLACES=731, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2969, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1392, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=93897, PETRI_PLACES=822, PETRI_TRANSITIONS=3127} [2022-01-19 08:11:22,191 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 754 predicate places. [2022-01-19 08:11:22,191 INFO L470 AbstractCegarLoop]: Abstraction has has 822 places, 3127 transitions, 93897 flow [2022-01-19 08:11:22,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 55.285714285714285) internal successors, (1161), 21 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:11:22,191 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:11:22,191 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 08:11:22,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-19 08:11:22,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-19 08:11:22,407 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:11:22,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:11:22,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1014756949, now seen corresponding path program 18 times [2022-01-19 08:11:22,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:11:22,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832953689] [2022-01-19 08:11:22,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:11:22,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:11:22,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:11:22,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:11:22,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:11:22,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832953689] [2022-01-19 08:11:22,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832953689] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:11:22,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500299678] [2022-01-19 08:11:22,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 08:11:22,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:11:22,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:11:22,476 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:11:22,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-19 08:11:22,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-19 08:11:22,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:11:22,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:11:22,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:11:22,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:11:22,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:11:22,801 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:11:22,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500299678] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:11:22,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:11:22,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-19 08:11:22,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485217493] [2022-01-19 08:11:22,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:11:22,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-19 08:11:22,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:11:22,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-19 08:11:22,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-19 08:11:22,802 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 08:11:22,803 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 822 places, 3127 transitions, 93897 flow. Second operand has 21 states, 21 states have (on average 55.333333333333336) internal successors, (1162), 21 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:11:22,803 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:11:22,803 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 08:11:22,803 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:11:45,638 INFO L129 PetriNetUnfolder]: 9907/27925 cut-off events. [2022-01-19 08:11:45,639 INFO L130 PetriNetUnfolder]: For 1647360/1647360 co-relation queries the response was YES. [2022-01-19 08:11:46,395 INFO L84 FinitePrefix]: Finished finitePrefix Result has 285090 conditions, 27925 events. 9907/27925 cut-off events. For 1647360/1647360 co-relation queries the response was YES. Maximal size of possible extension queue 1967. Compared 351322 event pairs, 1470 based on Foata normal form. 9/27671 useless extension candidates. Maximal degree in co-relation 284866. Up to 11761 conditions per place. [2022-01-19 08:11:46,524 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 2473 selfloop transitions, 936 changer transitions 12/3463 dead transitions. [2022-01-19 08:11:46,524 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 880 places, 3463 transitions, 108666 flow [2022-01-19 08:11:46,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-19 08:11:46,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-01-19 08:11:46,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3622 transitions. [2022-01-19 08:11:46,527 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7466501752216038 [2022-01-19 08:11:46,527 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3622 transitions. [2022-01-19 08:11:46,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3622 transitions. [2022-01-19 08:11:46,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:11:46,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3622 transitions. [2022-01-19 08:11:46,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 57.492063492063494) internal successors, (3622), 63 states have internal predecessors, (3622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:11:46,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 77.0) internal successors, (4928), 64 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:11:46,532 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 77.0) internal successors, (4928), 64 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:11:46,532 INFO L186 Difference]: Start difference. First operand has 822 places, 3127 transitions, 93897 flow. Second operand 63 states and 3622 transitions. [2022-01-19 08:11:46,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 880 places, 3463 transitions, 108666 flow [2022-01-19 08:12:14,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 853 places, 3463 transitions, 108001 flow, removed 160 selfloop flow, removed 27 redundant places. [2022-01-19 08:12:14,757 INFO L242 Difference]: Finished difference. Result has 871 places, 3298 transitions, 100701 flow [2022-01-19 08:12:14,759 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=93236, PETRI_DIFFERENCE_MINUEND_PLACES=791, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=798, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=100701, PETRI_PLACES=871, PETRI_TRANSITIONS=3298} [2022-01-19 08:12:14,759 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 803 predicate places. [2022-01-19 08:12:14,759 INFO L470 AbstractCegarLoop]: Abstraction has has 871 places, 3298 transitions, 100701 flow [2022-01-19 08:12:14,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 55.333333333333336) internal successors, (1162), 21 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:12:14,759 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:12:14,760 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 08:12:14,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-19 08:12:14,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-01-19 08:12:14,960 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:12:14,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:12:14,960 INFO L85 PathProgramCache]: Analyzing trace with hash 523862579, now seen corresponding path program 19 times [2022-01-19 08:12:14,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:12:14,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101109217] [2022-01-19 08:12:14,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:12:14,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:12:14,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:12:15,030 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:12:15,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:12:15,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101109217] [2022-01-19 08:12:15,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101109217] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:12:15,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335226956] [2022-01-19 08:12:15,030 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 08:12:15,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:12:15,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:12:15,032 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:12:15,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-19 08:12:15,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:12:15,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:12:15,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:12:15,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:12:15,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:12:15,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:12:15,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335226956] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:12:15,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:12:15,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-19 08:12:15,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951106564] [2022-01-19 08:12:15,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:12:15,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-19 08:12:15,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:12:15,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-19 08:12:15,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-01-19 08:12:15,360 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 08:12:15,361 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 871 places, 3298 transitions, 100701 flow. Second operand has 21 states, 21 states have (on average 55.904761904761905) internal successors, (1174), 21 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:12:15,361 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:12:15,361 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 08:12:15,361 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:12:41,591 INFO L129 PetriNetUnfolder]: 10358/29165 cut-off events. [2022-01-19 08:12:41,592 INFO L130 PetriNetUnfolder]: For 2132370/2132370 co-relation queries the response was YES. [2022-01-19 08:12:42,396 INFO L84 FinitePrefix]: Finished finitePrefix Result has 309754 conditions, 29165 events. 10358/29165 cut-off events. For 2132370/2132370 co-relation queries the response was YES. Maximal size of possible extension queue 2051. Compared 368862 event pairs, 1183 based on Foata normal form. 106/29005 useless extension candidates. Maximal degree in co-relation 309409. Up to 9821 conditions per place. [2022-01-19 08:12:42,543 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 2081 selfloop transitions, 1478 changer transitions 5/3606 dead transitions. [2022-01-19 08:12:42,544 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 900 places, 3606 transitions, 115192 flow [2022-01-19 08:12:42,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-19 08:12:42,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-01-19 08:12:42,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1965 transitions. [2022-01-19 08:12:42,546 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7733175914994097 [2022-01-19 08:12:42,546 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1965 transitions. [2022-01-19 08:12:42,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1965 transitions. [2022-01-19 08:12:42,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:12:42,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1965 transitions. [2022-01-19 08:12:42,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 59.54545454545455) internal successors, (1965), 33 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:12:42,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 77.0) internal successors, (2618), 34 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:12:42,550 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 77.0) internal successors, (2618), 34 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:12:42,550 INFO L186 Difference]: Start difference. First operand has 871 places, 3298 transitions, 100701 flow. Second operand 33 states and 1965 transitions. [2022-01-19 08:12:42,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 900 places, 3606 transitions, 115192 flow [2022-01-19 08:13:16,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 897 places, 3606 transitions, 112585 flow, removed 1053 selfloop flow, removed 3 redundant places. [2022-01-19 08:13:17,071 INFO L242 Difference]: Finished difference. Result has 919 places, 3420 transitions, 107966 flow [2022-01-19 08:13:17,073 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=98874, PETRI_DIFFERENCE_MINUEND_PLACES=865, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1370, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1882, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=107966, PETRI_PLACES=919, PETRI_TRANSITIONS=3420} [2022-01-19 08:13:17,073 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 851 predicate places. [2022-01-19 08:13:17,074 INFO L470 AbstractCegarLoop]: Abstraction has has 919 places, 3420 transitions, 107966 flow [2022-01-19 08:13:17,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 55.904761904761905) internal successors, (1174), 21 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:13:17,074 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:13:17,074 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 08:13:17,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-19 08:13:17,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-19 08:13:17,274 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:13:17,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:13:17,275 INFO L85 PathProgramCache]: Analyzing trace with hash -701734391, now seen corresponding path program 20 times [2022-01-19 08:13:17,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:13:17,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330471707] [2022-01-19 08:13:17,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:13:17,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:13:17,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:13:17,347 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:13:17,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:13:17,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330471707] [2022-01-19 08:13:17,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330471707] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:13:17,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471395613] [2022-01-19 08:13:17,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:13:17,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:13:17,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:13:17,352 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:13:17,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-19 08:13:17,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:13:17,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:13:17,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:13:17,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:13:17,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:13:17,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:13:17,717 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 08:13:17,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471395613] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:13:17,718 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:13:17,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-01-19 08:13:17,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858698737] [2022-01-19 08:13:17,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:13:17,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 08:13:17,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:13:17,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 08:13:17,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-01-19 08:13:17,719 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 08:13:17,720 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 919 places, 3420 transitions, 107966 flow. Second operand has 19 states, 19 states have (on average 55.526315789473685) internal successors, (1055), 19 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:13:17,720 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:13:17,720 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 08:13:17,720 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:13:48,855 INFO L129 PetriNetUnfolder]: 10968/30802 cut-off events. [2022-01-19 08:13:48,855 INFO L130 PetriNetUnfolder]: For 2479850/2479850 co-relation queries the response was YES. [2022-01-19 08:13:49,594 INFO L84 FinitePrefix]: Finished finitePrefix Result has 340204 conditions, 30802 events. 10968/30802 cut-off events. For 2479850/2479850 co-relation queries the response was YES. Maximal size of possible extension queue 2175. Compared 392698 event pairs, 964 based on Foata normal form. 60/30795 useless extension candidates. Maximal degree in co-relation 339839. Up to 9318 conditions per place. [2022-01-19 08:13:49,896 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 2109 selfloop transitions, 1650 changer transitions 12/3813 dead transitions. [2022-01-19 08:13:49,896 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 964 places, 3813 transitions, 124584 flow [2022-01-19 08:13:49,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-19 08:13:49,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-01-19 08:13:49,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2725 transitions. [2022-01-19 08:13:49,898 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.769339356295878 [2022-01-19 08:13:49,899 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2725 transitions. [2022-01-19 08:13:49,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2725 transitions. [2022-01-19 08:13:49,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:13:49,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2725 transitions. [2022-01-19 08:13:49,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 59.23913043478261) internal successors, (2725), 46 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:13:49,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 77.0) internal successors, (3619), 47 states have internal predecessors, (3619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:13:49,904 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 77.0) internal successors, (3619), 47 states have internal predecessors, (3619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:13:49,904 INFO L186 Difference]: Start difference. First operand has 919 places, 3420 transitions, 107966 flow. Second operand 46 states and 2725 transitions. [2022-01-19 08:13:49,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 964 places, 3813 transitions, 124584 flow [2022-01-19 08:14:30,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 960 places, 3813 transitions, 124342 flow, removed 88 selfloop flow, removed 4 redundant places. [2022-01-19 08:14:30,913 INFO L242 Difference]: Finished difference. Result has 984 places, 3576 transitions, 118955 flow [2022-01-19 08:14:30,915 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=107768, PETRI_DIFFERENCE_MINUEND_PLACES=915, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1511, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1861, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=118955, PETRI_PLACES=984, PETRI_TRANSITIONS=3576} [2022-01-19 08:14:30,915 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 916 predicate places. [2022-01-19 08:14:30,916 INFO L470 AbstractCegarLoop]: Abstraction has has 984 places, 3576 transitions, 118955 flow [2022-01-19 08:14:30,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.526315789473685) internal successors, (1055), 19 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:14:30,916 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:14:30,916 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 08:14:30,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-19 08:14:31,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:14:31,116 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:14:31,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:14:31,117 INFO L85 PathProgramCache]: Analyzing trace with hash 2009021095, now seen corresponding path program 21 times [2022-01-19 08:14:31,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:14:31,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730094869] [2022-01-19 08:14:31,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:14:31,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:14:31,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:14:31,176 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:14:31,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:14:31,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730094869] [2022-01-19 08:14:31,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730094869] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:14:31,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758888082] [2022-01-19 08:14:31,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 08:14:31,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:14:31,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:14:31,180 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:14:31,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-19 08:14:31,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 08:14:31,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:14:31,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:14:31,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:14:31,380 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:14:31,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:14:31,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 08:14:31,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758888082] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:14:31,498 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:14:31,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-01-19 08:14:31,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139781887] [2022-01-19 08:14:31,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:14:31,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 08:14:31,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:14:31,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 08:14:31,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-01-19 08:14:31,499 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 08:14:31,500 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 984 places, 3576 transitions, 118955 flow. Second operand has 19 states, 19 states have (on average 55.526315789473685) internal successors, (1055), 19 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:14:31,500 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:14:31,500 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 08:14:31,500 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:15:06,546 INFO L129 PetriNetUnfolder]: 12031/33380 cut-off events. [2022-01-19 08:15:06,547 INFO L130 PetriNetUnfolder]: For 3140159/3140159 co-relation queries the response was YES. [2022-01-19 08:15:07,867 INFO L84 FinitePrefix]: Finished finitePrefix Result has 392520 conditions, 33380 events. 12031/33380 cut-off events. For 3140159/3140159 co-relation queries the response was YES. Maximal size of possible extension queue 2304. Compared 426713 event pairs, 1318 based on Foata normal form. 62/33172 useless extension candidates. Maximal degree in co-relation 392131. Up to 10661 conditions per place. [2022-01-19 08:15:08,088 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 2207 selfloop transitions, 1838 changer transitions 10/4097 dead transitions. [2022-01-19 08:15:08,088 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1033 places, 4097 transitions, 141372 flow [2022-01-19 08:15:08,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-19 08:15:08,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-01-19 08:15:08,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2988 transitions. [2022-01-19 08:15:08,091 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7608861726508785 [2022-01-19 08:15:08,091 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2988 transitions. [2022-01-19 08:15:08,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2988 transitions. [2022-01-19 08:15:08,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:15:08,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2988 transitions. [2022-01-19 08:15:08,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 58.588235294117645) internal successors, (2988), 51 states have internal predecessors, (2988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:15:08,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 77.0) internal successors, (4004), 52 states have internal predecessors, (4004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:15:08,098 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 77.0) internal successors, (4004), 52 states have internal predecessors, (4004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:15:08,098 INFO L186 Difference]: Start difference. First operand has 984 places, 3576 transitions, 118955 flow. Second operand 51 states and 2988 transitions. [2022-01-19 08:15:08,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1033 places, 4097 transitions, 141372 flow [2022-01-19 08:16:02,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1024 places, 4097 transitions, 140683 flow, removed 143 selfloop flow, removed 9 redundant places. [2022-01-19 08:16:02,287 INFO L242 Difference]: Finished difference. Result has 1050 places, 3872 transitions, 135194 flow [2022-01-19 08:16:02,290 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=118328, PETRI_DIFFERENCE_MINUEND_PLACES=974, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1582, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1948, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=135194, PETRI_PLACES=1050, PETRI_TRANSITIONS=3872} [2022-01-19 08:16:02,290 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 982 predicate places. [2022-01-19 08:16:02,290 INFO L470 AbstractCegarLoop]: Abstraction has has 1050 places, 3872 transitions, 135194 flow [2022-01-19 08:16:02,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.526315789473685) internal successors, (1055), 19 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:16:02,290 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:16:02,291 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 08:16:02,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-19 08:16:02,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-19 08:16:02,493 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:16:02,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:16:02,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1745473187, now seen corresponding path program 22 times [2022-01-19 08:16:02,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:16:02,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030728739] [2022-01-19 08:16:02,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:16:02,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:16:02,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:16:02,564 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:16:02,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:16:02,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030728739] [2022-01-19 08:16:02,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030728739] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:16:02,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989872707] [2022-01-19 08:16:02,564 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 08:16:02,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:16:02,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:16:02,566 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:16:02,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-19 08:16:02,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 08:16:02,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:16:02,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:16:02,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:16:02,798 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:16:02,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:16:02,893 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 08:16:02,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989872707] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:16:02,893 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:16:02,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-01-19 08:16:02,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187845252] [2022-01-19 08:16:02,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:16:02,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 08:16:02,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:16:02,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 08:16:02,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-01-19 08:16:02,894 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 08:16:02,895 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1050 places, 3872 transitions, 135194 flow. Second operand has 19 states, 19 states have (on average 55.89473684210526) internal successors, (1062), 19 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:16:02,895 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:16:02,895 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 08:16:02,895 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:16:44,569 INFO L129 PetriNetUnfolder]: 13269/36573 cut-off events. [2022-01-19 08:16:44,569 INFO L130 PetriNetUnfolder]: For 3878537/3878537 co-relation queries the response was YES. [2022-01-19 08:16:46,062 INFO L84 FinitePrefix]: Finished finitePrefix Result has 455109 conditions, 36573 events. 13269/36573 cut-off events. For 3878537/3878537 co-relation queries the response was YES. Maximal size of possible extension queue 2502. Compared 472333 event pairs, 1496 based on Foata normal form. 30/36288 useless extension candidates. Maximal degree in co-relation 454697. Up to 12185 conditions per place. [2022-01-19 08:16:46,273 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 2414 selfloop transitions, 1958 changer transitions 15/4429 dead transitions. [2022-01-19 08:16:46,273 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1087 places, 4429 transitions, 162133 flow [2022-01-19 08:16:46,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-19 08:16:46,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-01-19 08:16:46,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2213 transitions. [2022-01-19 08:16:46,275 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7563226247436774 [2022-01-19 08:16:46,275 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2213 transitions. [2022-01-19 08:16:46,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2213 transitions. [2022-01-19 08:16:46,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:16:46,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2213 transitions. [2022-01-19 08:16:46,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 58.23684210526316) internal successors, (2213), 38 states have internal predecessors, (2213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:16:46,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 77.0) internal successors, (3003), 39 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:16:46,279 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 77.0) internal successors, (3003), 39 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:16:46,279 INFO L186 Difference]: Start difference. First operand has 1050 places, 3872 transitions, 135194 flow. Second operand 38 states and 2213 transitions. [2022-01-19 08:16:46,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1087 places, 4429 transitions, 162133 flow [2022-01-19 08:18:03,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1083 places, 4429 transitions, 160943 flow, removed 467 selfloop flow, removed 4 redundant places. [2022-01-19 08:18:03,632 INFO L242 Difference]: Finished difference. Result has 1103 places, 4224 transitions, 155977 flow [2022-01-19 08:18:03,634 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=134334, PETRI_DIFFERENCE_MINUEND_PLACES=1046, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3872, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1623, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2075, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=155977, PETRI_PLACES=1103, PETRI_TRANSITIONS=4224} [2022-01-19 08:18:03,635 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 1035 predicate places. [2022-01-19 08:18:03,635 INFO L470 AbstractCegarLoop]: Abstraction has has 1103 places, 4224 transitions, 155977 flow [2022-01-19 08:18:03,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.89473684210526) internal successors, (1062), 19 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:18:03,635 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:18:03,635 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 08:18:03,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-19 08:18:03,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-19 08:18:03,837 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:18:03,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:18:03,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1552593637, now seen corresponding path program 23 times [2022-01-19 08:18:03,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:18:03,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952979337] [2022-01-19 08:18:03,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:18:03,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:18:03,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:18:03,898 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:18:03,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:18:03,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952979337] [2022-01-19 08:18:03,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952979337] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:18:03,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516689165] [2022-01-19 08:18:03,899 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 08:18:03,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:18:03,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:18:03,901 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:18:03,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-19 08:18:03,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 08:18:03,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:18:03,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:18:03,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:18:04,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:18:04,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:18:04,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 08:18:04,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516689165] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:18:04,235 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:18:04,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-01-19 08:18:04,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141746285] [2022-01-19 08:18:04,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:18:04,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 08:18:04,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:18:04,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 08:18:04,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-01-19 08:18:04,237 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 08:18:04,238 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1103 places, 4224 transitions, 155977 flow. Second operand has 19 states, 19 states have (on average 55.89473684210526) internal successors, (1062), 19 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:18:04,238 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:18:04,238 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 08:18:04,238 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:18:54,556 INFO L129 PetriNetUnfolder]: 13574/37410 cut-off events. [2022-01-19 08:18:54,556 INFO L130 PetriNetUnfolder]: For 4554784/4554784 co-relation queries the response was YES. [2022-01-19 08:18:56,280 INFO L84 FinitePrefix]: Finished finitePrefix Result has 487640 conditions, 37410 events. 13574/37410 cut-off events. For 4554784/4554784 co-relation queries the response was YES. Maximal size of possible extension queue 2580. Compared 484165 event pairs, 1125 based on Foata normal form. 60/37382 useless extension candidates. Maximal degree in co-relation 487272. Up to 9760 conditions per place. [2022-01-19 08:18:56,692 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 2165 selfloop transitions, 2271 changer transitions 18/4496 dead transitions. [2022-01-19 08:18:56,692 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1146 places, 4496 transitions, 172864 flow [2022-01-19 08:18:56,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-19 08:18:56,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-01-19 08:18:56,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2846 transitions. [2022-01-19 08:18:56,694 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7543069175722237 [2022-01-19 08:18:56,694 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2846 transitions. [2022-01-19 08:18:56,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2846 transitions. [2022-01-19 08:18:56,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:18:56,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2846 transitions. [2022-01-19 08:18:56,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 58.08163265306123) internal successors, (2846), 49 states have internal predecessors, (2846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:18:56,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 77.0) internal successors, (3850), 50 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:18:56,698 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 77.0) internal successors, (3850), 50 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:18:56,698 INFO L186 Difference]: Start difference. First operand has 1103 places, 4224 transitions, 155977 flow. Second operand 49 states and 2846 transitions. [2022-01-19 08:18:56,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1146 places, 4496 transitions, 172864 flow [2022-01-19 08:20:20,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1134 places, 4496 transitions, 172009 flow, removed 212 selfloop flow, removed 12 redundant places. [2022-01-19 08:20:21,101 INFO L242 Difference]: Finished difference. Result has 1150 places, 4317 transitions, 167339 flow [2022-01-19 08:20:21,105 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=154935, PETRI_DIFFERENCE_MINUEND_PLACES=1086, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2003, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=167339, PETRI_PLACES=1150, PETRI_TRANSITIONS=4317} [2022-01-19 08:20:21,108 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 1082 predicate places. [2022-01-19 08:20:21,110 INFO L470 AbstractCegarLoop]: Abstraction has has 1150 places, 4317 transitions, 167339 flow [2022-01-19 08:20:21,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.89473684210526) internal successors, (1062), 19 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:20:21,111 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:20:21,111 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 08:20:21,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-19 08:20:21,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:20:21,337 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:20:21,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:20:21,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1442077163, now seen corresponding path program 24 times [2022-01-19 08:20:21,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:20:21,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311837099] [2022-01-19 08:20:21,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:20:21,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:20:21,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:20:21,392 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:20:21,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:20:21,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311837099] [2022-01-19 08:20:21,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311837099] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:20:21,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182291336] [2022-01-19 08:20:21,392 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 08:20:21,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:20:21,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:20:21,395 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:20:21,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-19 08:20:21,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-19 08:20:21,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:20:21,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:20:21,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:20:21,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:20:21,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:20:21,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:20:21,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182291336] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:20:21,674 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:20:21,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-01-19 08:20:21,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383120994] [2022-01-19 08:20:21,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:20:21,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 08:20:21,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:20:21,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 08:20:21,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-01-19 08:20:21,676 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-01-19 08:20:21,677 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1150 places, 4317 transitions, 167339 flow. Second operand has 19 states, 19 states have (on average 55.526315789473685) internal successors, (1055), 19 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:20:21,677 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:20:21,677 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-01-19 08:20:21,677 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2022-01-19 08:21:01,362 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 08:21:01,401 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 08:21:02,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-19 08:21:02,125 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-01-19 08:21:02,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-01-19 08:21:02,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:21:02,326 WARN L594 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (19states, 53/77 universal loopers) in iteration 31,while PetriNetUnfolder was constructing finite prefix that currently has 395048 conditions, 26753 events (10354/26752 cut-off events. For 3640315/3640315 co-relation queries the response was YES. Maximal size of possible extension queue 2627. Compared 349487 event pairs, 1408 based on Foata normal form. 4/28441 useless extension candidates. Maximal degree in co-relation 394716. Up to 13516 conditions per place.). [2022-01-19 08:21:02,327 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-19 08:21:02,327 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-19 08:21:02,329 INFO L732 BasicCegarLoop]: Path program histogram: [24, 6, 1] [2022-01-19 08:21:02,331 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-19 08:21:02,331 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-19 08:21:02,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.01 08:21:02 BasicIcfg [2022-01-19 08:21:02,335 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-19 08:21:02,336 INFO L158 Benchmark]: Toolchain (without parser) took 805059.61ms. Allocated memory was 398.5MB in the beginning and 13.7GB in the end (delta: 13.3GB). Free memory was 345.1MB in the beginning and 9.4GB in the end (delta: -9.0GB). Peak memory consumption was 4.5GB. Max. memory is 16.0GB. [2022-01-19 08:21:02,336 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 398.5MB. Free memory is still 361.8MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 08:21:02,336 INFO L158 Benchmark]: CACSL2BoogieTranslator took 228.27ms. Allocated memory is still 398.5MB. Free memory was 344.9MB in the beginning and 370.3MB in the end (delta: -25.4MB). Peak memory consumption was 19.6MB. Max. memory is 16.0GB. [2022-01-19 08:21:02,336 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.21ms. Allocated memory is still 398.5MB. Free memory was 370.3MB in the beginning and 368.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 08:21:02,336 INFO L158 Benchmark]: Boogie Preprocessor took 30.18ms. Allocated memory is still 398.5MB. Free memory was 368.2MB in the beginning and 367.2MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 08:21:02,336 INFO L158 Benchmark]: RCFGBuilder took 316.05ms. Allocated memory is still 398.5MB. Free memory was 367.2MB in the beginning and 353.6MB in the end (delta: 13.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2022-01-19 08:21:02,337 INFO L158 Benchmark]: TraceAbstraction took 804443.26ms. Allocated memory was 398.5MB in the beginning and 13.7GB in the end (delta: 13.3GB). Free memory was 352.5MB in the beginning and 9.4GB in the end (delta: -9.0GB). Peak memory consumption was 4.6GB. Max. memory is 16.0GB. [2022-01-19 08:21:02,338 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 398.5MB. Free memory is still 361.8MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 228.27ms. Allocated memory is still 398.5MB. Free memory was 344.9MB in the beginning and 370.3MB in the end (delta: -25.4MB). Peak memory consumption was 19.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 34.21ms. Allocated memory is still 398.5MB. Free memory was 370.3MB in the beginning and 368.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 30.18ms. Allocated memory is still 398.5MB. Free memory was 368.2MB in the beginning and 367.2MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 316.05ms. Allocated memory is still 398.5MB. Free memory was 367.2MB in the beginning and 353.6MB in the end (delta: 13.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 804443.26ms. Allocated memory was 398.5MB in the beginning and 13.7GB in the end (delta: 13.3GB). Free memory was 352.5MB in the beginning and 9.4GB in the end (delta: -9.0GB). Peak memory consumption was 4.6GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (19states, 53/77 universal loopers) in iteration 31,while PetriNetUnfolder was constructing finite prefix that currently has 395048 conditions, 26753 events (10354/26752 cut-off events. For 3640315/3640315 co-relation queries the response was YES. Maximal size of possible extension queue 2627. Compared 349487 event pairs, 1408 based on Foata normal form. 4/28441 useless extension candidates. Maximal degree in co-relation 394716. Up to 13516 conditions per place.). - TimeoutResultAtElement [Line: 68]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (19states, 53/77 universal loopers) in iteration 31,while PetriNetUnfolder was constructing finite prefix that currently has 395048 conditions, 26753 events (10354/26752 cut-off events. For 3640315/3640315 co-relation queries the response was YES. Maximal size of possible extension queue 2627. Compared 349487 event pairs, 1408 based on Foata normal form. 4/28441 useless extension candidates. Maximal degree in co-relation 394716. Up to 13516 conditions per place.). - TimeoutResultAtElement [Line: 67]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (19states, 53/77 universal loopers) in iteration 31,while PetriNetUnfolder was constructing finite prefix that currently has 395048 conditions, 26753 events (10354/26752 cut-off events. For 3640315/3640315 co-relation queries the response was YES. Maximal size of possible extension queue 2627. Compared 349487 event pairs, 1408 based on Foata normal form. 4/28441 useless extension candidates. Maximal degree in co-relation 394716. Up to 13516 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 93 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: 804.3s, OverallIterations: 31, TraceHistogramMax: 2, PathProgramHistogramMax: 24, EmptinessCheckTime: 0.0s, AutomataDifference: 786.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5603 SdHoareTripleChecker+Valid, 6.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5603 mSDsluCounter, 4051 SdHoareTripleChecker+Invalid, 5.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 7354 mSDsCounter, 1288 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 16319 IncrementalHoareTripleChecker+Invalid, 17607 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1288 mSolverCounterUnsat, 708 mSDtfsCounter, 16319 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4741 GetRequests, 3297 SyntacticMatches, 31 SemanticMatches, 1413 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28228 ImplicationChecksByTransitivity, 12.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=167339occurred in iteration=30, InterpolantAutomatonStates: 1166, 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, 0.7s SatisfiabilityAnalysisTime, 9.2s InterpolantComputationTime, 3771 NumberOfCodeBlocks, 3741 NumberOfCodeBlocksAsserted, 90 NumberOfCheckSat, 5460 ConstructedInterpolants, 0 QuantifiedInterpolants, 11814 SizeOfPredicates, 198 NumberOfNonLiveVariables, 4124 ConjunctsInSsa, 207 ConjunctsInUnsatCore, 85 InterpolantComputations, 4 PerfectInterpolantSequences, 276/570 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