/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-After.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 14:04:52,209 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 14:04:52,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 14:04:52,268 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 14:04:52,269 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 14:04:52,271 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 14:04:52,273 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 14:04:52,275 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 14:04:52,276 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 14:04:52,281 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 14:04:52,281 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 14:04:52,282 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 14:04:52,282 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 14:04:52,284 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 14:04:52,285 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 14:04:52,287 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 14:04:52,288 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 14:04:52,288 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 14:04:52,290 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 14:04:52,294 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 14:04:52,295 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 14:04:52,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 14:04:52,296 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 14:04:52,297 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 14:04:52,298 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 14:04:52,298 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 14:04:52,298 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 14:04:52,299 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 14:04:52,299 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 14:04:52,299 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 14:04:52,299 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 14:04:52,300 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 14:04:52,300 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 14:04:52,301 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 14:04:52,301 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 14:04:52,301 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 14:04:52,302 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 14:04:52,302 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 14:04:52,302 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 14:04:52,302 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 14:04:52,303 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 14:04:52,306 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-After.epf [2022-01-19 14:04:52,331 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 14:04:52,331 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 14:04:52,332 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 14:04:52,332 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 14:04:52,332 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 14:04:52,332 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 14:04:52,332 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 14:04:52,332 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 14:04:52,332 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 14:04:52,332 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 14:04:52,333 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 14:04:52,333 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 14:04:52,333 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 14:04:52,333 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 14:04:52,333 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 14:04:52,334 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 14:04:52,334 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 14:04:52,334 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 14:04:52,334 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 14:04:52,334 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 14:04:52,334 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 14:04:52,334 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 14:04:52,334 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 14:04:52,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 14:04:52,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 14:04:52,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 14:04:52,334 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 14:04:52,336 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 14:04:52,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 14:04:52,336 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 14:04:52,336 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 14:04:52,336 INFO L138 SettingsManager]: * When to check the insufficient erros location relative to the other error locations=AFTER [2022-01-19 14:04:52,336 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 14:04:52,484 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 14:04:52,497 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 14:04:52,498 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 14:04:52,499 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 14:04:52,500 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 14:04:52,500 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c [2022-01-19 14:04:52,543 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ede620454/31e3b3e8703646168f055b7a8e2ef171/FLAG7bd623ca8 [2022-01-19 14:04:52,912 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 14:04:52,913 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c [2022-01-19 14:04:52,927 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ede620454/31e3b3e8703646168f055b7a8e2ef171/FLAG7bd623ca8 [2022-01-19 14:04:52,938 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ede620454/31e3b3e8703646168f055b7a8e2ef171 [2022-01-19 14:04:52,940 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 14:04:52,941 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 14:04:52,943 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 14:04:52,943 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 14:04:52,945 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 14:04:52,945 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 02:04:52" (1/1) ... [2022-01-19 14:04:52,946 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70a7c15a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:04:52, skipping insertion in model container [2022-01-19 14:04:52,946 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 02:04:52" (1/1) ... [2022-01-19 14:04:52,950 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 14:04:52,960 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 14:04:53,141 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-alt.wvr.c[2087,2100] [2022-01-19 14:04:53,144 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 14:04:53,150 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 14:04:53,168 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-alt.wvr.c[2087,2100] [2022-01-19 14:04:53,172 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 14:04:53,183 INFO L208 MainTranslator]: Completed translation [2022-01-19 14:04:53,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:04:53 WrapperNode [2022-01-19 14:04:53,184 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 14:04:53,184 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 14:04:53,184 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 14:04:53,184 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 14:04:53,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:04:53" (1/1) ... [2022-01-19 14:04:53,195 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:04:53" (1/1) ... [2022-01-19 14:04:53,212 INFO L137 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 76 [2022-01-19 14:04:53,212 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 14:04:53,213 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 14:04:53,213 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 14:04:53,213 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 14:04:53,218 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:04:53" (1/1) ... [2022-01-19 14:04:53,218 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:04:53" (1/1) ... [2022-01-19 14:04:53,226 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:04:53" (1/1) ... [2022-01-19 14:04:53,227 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:04:53" (1/1) ... [2022-01-19 14:04:53,235 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:04:53" (1/1) ... [2022-01-19 14:04:53,237 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:04:53" (1/1) ... [2022-01-19 14:04:53,238 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:04:53" (1/1) ... [2022-01-19 14:04:53,239 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 14:04:53,239 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 14:04:53,239 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 14:04:53,240 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 14:04:53,243 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:04:53" (1/1) ... [2022-01-19 14:04:53,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 14:04:53,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:04:53,264 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 14:04:53,271 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 14:04:53,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 14:04:53,306 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-19 14:04:53,306 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-19 14:04:53,306 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-19 14:04:53,306 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-19 14:04:53,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 14:04:53,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 14:04:53,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 14:04:53,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-19 14:04:53,307 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-19 14:04:53,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 14:04:53,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 14:04:53,307 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 14:04:53,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 14:04:53,308 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 14:04:53,385 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 14:04:53,386 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 14:04:53,530 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 14:04:53,556 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 14:04:53,557 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-19 14:04:53,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 02:04:53 BoogieIcfgContainer [2022-01-19 14:04:53,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 14:04:53,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 14:04:53,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 14:04:53,561 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 14:04:53,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 02:04:52" (1/3) ... [2022-01-19 14:04:53,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72c8e193 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 02:04:53, skipping insertion in model container [2022-01-19 14:04:53,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:04:53" (2/3) ... [2022-01-19 14:04:53,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72c8e193 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 02:04:53, skipping insertion in model container [2022-01-19 14:04:53,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 02:04:53" (3/3) ... [2022-01-19 14:04:53,563 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2022-01-19 14:04:53,575 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 14:04:53,575 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 14:04:53,575 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 14:04:53,617 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,617 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,617 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,618 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,618 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,618 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,618 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,618 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,619 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,619 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,619 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,619 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,619 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,619 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,619 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,620 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,620 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,620 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,620 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,620 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,620 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,620 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,621 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,621 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,621 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,621 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,621 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,621 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,622 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,622 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,622 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,622 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,622 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,622 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,622 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,623 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,623 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,623 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,623 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,623 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,623 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,623 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,623 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,624 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,624 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,624 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,624 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,624 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,626 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,626 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,626 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,626 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,626 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,626 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,627 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,627 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,627 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,627 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,628 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,628 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:04:53,630 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-19 14:04:53,658 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 14:04:53,664 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 14:04:53,664 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-19 14:04:53,678 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 90 places, 89 transitions, 194 flow [2022-01-19 14:04:53,729 INFO L129 PetriNetUnfolder]: 6/87 cut-off events. [2022-01-19 14:04:53,729 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 14:04:53,731 INFO L84 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 87 events. 6/87 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2022-01-19 14:04:53,731 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 89 transitions, 194 flow [2022-01-19 14:04:53,734 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 78 transitions, 168 flow [2022-01-19 14:04:53,753 INFO L129 PetriNetUnfolder]: 6/77 cut-off events. [2022-01-19 14:04:53,753 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 14:04:53,753 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:04:53,754 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 14:04:53,754 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:04:53,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:04:53,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1515800342, now seen corresponding path program 1 times [2022-01-19 14:04:53,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:04:53,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219881215] [2022-01-19 14:04:53,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:04:53,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:04:53,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:04:53,935 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 14:04:53,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:04:53,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219881215] [2022-01-19 14:04:53,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219881215] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:04:53,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:04:53,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-19 14:04:53,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286673117] [2022-01-19 14:04:53,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:04:53,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-19 14:04:53,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:04:53,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-19 14:04:53,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-19 14:04:53,976 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 89 [2022-01-19 14:04:53,979 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 78 transitions, 168 flow. Second operand has 2 states, 2 states have (on average 80.5) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:04:53,980 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:04:53,980 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 89 [2022-01-19 14:04:53,981 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:04:54,027 INFO L129 PetriNetUnfolder]: 11/107 cut-off events. [2022-01-19 14:04:54,028 INFO L130 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2022-01-19 14:04:54,028 INFO L84 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 107 events. 11/107 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 146 event pairs, 3 based on Foata normal form. 11/109 useless extension candidates. Maximal degree in co-relation 67. Up to 19 conditions per place. [2022-01-19 14:04:54,030 INFO L132 encePairwiseOnDemand]: 85/89 looper letters, 6 selfloop transitions, 0 changer transitions 2/74 dead transitions. [2022-01-19 14:04:54,030 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 74 transitions, 172 flow [2022-01-19 14:04:54,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-19 14:04:54,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-01-19 14:04:54,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 166 transitions. [2022-01-19 14:04:54,039 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9325842696629213 [2022-01-19 14:04:54,039 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 166 transitions. [2022-01-19 14:04:54,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 166 transitions. [2022-01-19 14:04:54,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:04:54,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 166 transitions. [2022-01-19 14:04:54,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 83.0) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:04:54,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:04:54,052 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:04:54,053 INFO L186 Difference]: Start difference. First operand has 79 places, 78 transitions, 168 flow. Second operand 2 states and 166 transitions. [2022-01-19 14:04:54,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 74 transitions, 172 flow [2022-01-19 14:04:54,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 74 transitions, 164 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 14:04:54,062 INFO L242 Difference]: Finished difference. Result has 76 places, 72 transitions, 148 flow [2022-01-19 14:04:54,063 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=148, PETRI_PLACES=76, PETRI_TRANSITIONS=72} [2022-01-19 14:04:54,067 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, -3 predicate places. [2022-01-19 14:04:54,067 INFO L470 AbstractCegarLoop]: Abstraction has has 76 places, 72 transitions, 148 flow [2022-01-19 14:04:54,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 80.5) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:04:54,067 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:04:54,067 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 14:04:54,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 14:04:54,068 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:04:54,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:04:54,069 INFO L85 PathProgramCache]: Analyzing trace with hash -79113043, now seen corresponding path program 1 times [2022-01-19 14:04:54,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:04:54,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795103037] [2022-01-19 14:04:54,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:04:54,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:04:54,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:04:54,541 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 14:04:54,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:04:54,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795103037] [2022-01-19 14:04:54,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795103037] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:04:54,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:04:54,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-19 14:04:54,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909975599] [2022-01-19 14:04:54,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:04:54,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-19 14:04:54,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:04:54,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-19 14:04:54,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-01-19 14:04:54,547 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-01-19 14:04:54,548 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 72 transitions, 148 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:04:54,548 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:04:54,548 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-01-19 14:04:54,548 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:04:54,889 INFO L129 PetriNetUnfolder]: 67/248 cut-off events. [2022-01-19 14:04:54,889 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-01-19 14:04:54,890 INFO L84 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 248 events. 67/248 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 955 event pairs, 34 based on Foata normal form. 6/223 useless extension candidates. Maximal degree in co-relation 417. Up to 102 conditions per place. [2022-01-19 14:04:54,891 INFO L132 encePairwiseOnDemand]: 76/89 looper letters, 43 selfloop transitions, 11 changer transitions 6/103 dead transitions. [2022-01-19 14:04:54,891 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 103 transitions, 337 flow [2022-01-19 14:04:54,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-19 14:04:54,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-01-19 14:04:54,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 698 transitions. [2022-01-19 14:04:54,894 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.653558052434457 [2022-01-19 14:04:54,894 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 698 transitions. [2022-01-19 14:04:54,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 698 transitions. [2022-01-19 14:04:54,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:04:54,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 698 transitions. [2022-01-19 14:04:54,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.166666666666664) internal successors, (698), 12 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:04:54,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:04:54,900 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:04:54,900 INFO L186 Difference]: Start difference. First operand has 76 places, 72 transitions, 148 flow. Second operand 12 states and 698 transitions. [2022-01-19 14:04:54,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 103 transitions, 337 flow [2022-01-19 14:04:54,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 103 transitions, 337 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 14:04:54,904 INFO L242 Difference]: Finished difference. Result has 92 places, 79 transitions, 213 flow [2022-01-19 14:04:54,904 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=213, PETRI_PLACES=92, PETRI_TRANSITIONS=79} [2022-01-19 14:04:54,905 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 13 predicate places. [2022-01-19 14:04:54,905 INFO L470 AbstractCegarLoop]: Abstraction has has 92 places, 79 transitions, 213 flow [2022-01-19 14:04:54,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:04:54,905 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:04:54,906 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 14:04:54,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 14:04:54,906 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:04:54,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:04:54,907 INFO L85 PathProgramCache]: Analyzing trace with hash -42932599, now seen corresponding path program 2 times [2022-01-19 14:04:54,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:04:54,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304976207] [2022-01-19 14:04:54,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:04:54,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:04:54,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:04:55,265 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 14:04:55,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:04:55,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304976207] [2022-01-19 14:04:55,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304976207] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:04:55,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:04:55,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-19 14:04:55,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171754700] [2022-01-19 14:04:55,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:04:55,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-19 14:04:55,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:04:55,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-19 14:04:55,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-01-19 14:04:55,268 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-01-19 14:04:55,269 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 79 transitions, 213 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:04:55,269 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:04:55,269 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-01-19 14:04:55,269 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:04:55,548 INFO L129 PetriNetUnfolder]: 68/264 cut-off events. [2022-01-19 14:04:55,548 INFO L130 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2022-01-19 14:04:55,551 INFO L84 FinitePrefix]: Finished finitePrefix Result has 542 conditions, 264 events. 68/264 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1119 event pairs, 36 based on Foata normal form. 1/262 useless extension candidates. Maximal degree in co-relation 531. Up to 102 conditions per place. [2022-01-19 14:04:55,552 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 40 selfloop transitions, 11 changer transitions 11/105 dead transitions. [2022-01-19 14:04:55,552 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 105 transitions, 429 flow [2022-01-19 14:04:55,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-19 14:04:55,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-01-19 14:04:55,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 695 transitions. [2022-01-19 14:04:55,554 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.650749063670412 [2022-01-19 14:04:55,554 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 695 transitions. [2022-01-19 14:04:55,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 695 transitions. [2022-01-19 14:04:55,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:04:55,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 695 transitions. [2022-01-19 14:04:55,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 57.916666666666664) internal successors, (695), 12 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:04:55,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:04:55,559 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:04:55,561 INFO L186 Difference]: Start difference. First operand has 92 places, 79 transitions, 213 flow. Second operand 12 states and 695 transitions. [2022-01-19 14:04:55,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 105 transitions, 429 flow [2022-01-19 14:04:55,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 105 transitions, 407 flow, removed 8 selfloop flow, removed 6 redundant places. [2022-01-19 14:04:55,568 INFO L242 Difference]: Finished difference. Result has 100 places, 80 transitions, 247 flow [2022-01-19 14:04:55,568 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=247, PETRI_PLACES=100, PETRI_TRANSITIONS=80} [2022-01-19 14:04:55,570 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 21 predicate places. [2022-01-19 14:04:55,570 INFO L470 AbstractCegarLoop]: Abstraction has has 100 places, 80 transitions, 247 flow [2022-01-19 14:04:55,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:04:55,570 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:04:55,571 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 14:04:55,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-19 14:04:55,571 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:04:55,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:04:55,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1623942775, now seen corresponding path program 3 times [2022-01-19 14:04:55,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:04:55,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444191700] [2022-01-19 14:04:55,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:04:55,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:04:55,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:04:55,829 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 14:04:55,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:04:55,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444191700] [2022-01-19 14:04:55,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444191700] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:04:55,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:04:55,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-19 14:04:55,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131575973] [2022-01-19 14:04:55,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:04:55,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-19 14:04:55,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:04:55,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-19 14:04:55,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-01-19 14:04:55,831 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-01-19 14:04:55,832 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 80 transitions, 247 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:04:55,832 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:04:55,832 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-01-19 14:04:55,832 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:04:56,166 INFO L129 PetriNetUnfolder]: 72/299 cut-off events. [2022-01-19 14:04:56,166 INFO L130 PetriNetUnfolder]: For 174/174 co-relation queries the response was YES. [2022-01-19 14:04:56,167 INFO L84 FinitePrefix]: Finished finitePrefix Result has 670 conditions, 299 events. 72/299 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1369 event pairs, 41 based on Foata normal form. 1/295 useless extension candidates. Maximal degree in co-relation 655. Up to 105 conditions per place. [2022-01-19 14:04:56,168 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 48 selfloop transitions, 14 changer transitions 8/113 dead transitions. [2022-01-19 14:04:56,168 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 113 transitions, 519 flow [2022-01-19 14:04:56,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-19 14:04:56,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-01-19 14:04:56,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 704 transitions. [2022-01-19 14:04:56,170 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6591760299625468 [2022-01-19 14:04:56,170 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 704 transitions. [2022-01-19 14:04:56,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 704 transitions. [2022-01-19 14:04:56,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:04:56,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 704 transitions. [2022-01-19 14:04:56,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.666666666666664) internal successors, (704), 12 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:04:56,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:04:56,173 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:04:56,173 INFO L186 Difference]: Start difference. First operand has 100 places, 80 transitions, 247 flow. Second operand 12 states and 704 transitions. [2022-01-19 14:04:56,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 113 transitions, 519 flow [2022-01-19 14:04:56,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 113 transitions, 474 flow, removed 14 selfloop flow, removed 9 redundant places. [2022-01-19 14:04:56,177 INFO L242 Difference]: Finished difference. Result has 104 places, 84 transitions, 301 flow [2022-01-19 14:04:56,177 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=301, PETRI_PLACES=104, PETRI_TRANSITIONS=84} [2022-01-19 14:04:56,177 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 25 predicate places. [2022-01-19 14:04:56,177 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 84 transitions, 301 flow [2022-01-19 14:04:56,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:04:56,178 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:04:56,178 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 14:04:56,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-19 14:04:56,178 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:04:56,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:04:56,179 INFO L85 PathProgramCache]: Analyzing trace with hash -211036747, now seen corresponding path program 4 times [2022-01-19 14:04:56,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:04:56,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540983418] [2022-01-19 14:04:56,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:04:56,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:04:56,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:04:56,469 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 14:04:56,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:04:56,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540983418] [2022-01-19 14:04:56,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540983418] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:04:56,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:04:56,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-19 14:04:56,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838070218] [2022-01-19 14:04:56,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:04:56,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-19 14:04:56,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:04:56,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-19 14:04:56,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-01-19 14:04:56,471 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-01-19 14:04:56,472 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 84 transitions, 301 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:04:56,472 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:04:56,472 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-01-19 14:04:56,472 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:04:56,774 INFO L129 PetriNetUnfolder]: 71/291 cut-off events. [2022-01-19 14:04:56,774 INFO L130 PetriNetUnfolder]: For 218/218 co-relation queries the response was YES. [2022-01-19 14:04:56,775 INFO L84 FinitePrefix]: Finished finitePrefix Result has 681 conditions, 291 events. 71/291 cut-off events. For 218/218 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1313 event pairs, 34 based on Foata normal form. 1/286 useless extension candidates. Maximal degree in co-relation 664. Up to 105 conditions per place. [2022-01-19 14:04:56,776 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 50 selfloop transitions, 15 changer transitions 6/114 dead transitions. [2022-01-19 14:04:56,776 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 114 transitions, 559 flow [2022-01-19 14:04:56,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-19 14:04:56,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-01-19 14:04:56,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 703 transitions. [2022-01-19 14:04:56,778 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6582397003745318 [2022-01-19 14:04:56,778 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 703 transitions. [2022-01-19 14:04:56,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 703 transitions. [2022-01-19 14:04:56,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:04:56,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 703 transitions. [2022-01-19 14:04:56,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.583333333333336) internal successors, (703), 12 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:04:56,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:04:56,781 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:04:56,781 INFO L186 Difference]: Start difference. First operand has 104 places, 84 transitions, 301 flow. Second operand 12 states and 703 transitions. [2022-01-19 14:04:56,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 114 transitions, 559 flow [2022-01-19 14:04:56,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 114 transitions, 520 flow, removed 11 selfloop flow, removed 8 redundant places. [2022-01-19 14:04:56,785 INFO L242 Difference]: Finished difference. Result has 110 places, 86 transitions, 352 flow [2022-01-19 14:04:56,785 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=352, PETRI_PLACES=110, PETRI_TRANSITIONS=86} [2022-01-19 14:04:56,785 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 31 predicate places. [2022-01-19 14:04:56,785 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 86 transitions, 352 flow [2022-01-19 14:04:56,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:04:56,786 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:04:56,786 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 14:04:56,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-19 14:04:56,786 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:04:56,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:04:56,787 INFO L85 PathProgramCache]: Analyzing trace with hash -773440099, now seen corresponding path program 5 times [2022-01-19 14:04:56,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:04:56,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886222709] [2022-01-19 14:04:56,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:04:56,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:04:56,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:04:57,034 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 14:04:57,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:04:57,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886222709] [2022-01-19 14:04:57,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886222709] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:04:57,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:04:57,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-19 14:04:57,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296101334] [2022-01-19 14:04:57,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:04:57,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-19 14:04:57,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:04:57,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-19 14:04:57,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-01-19 14:04:57,036 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-01-19 14:04:57,037 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 86 transitions, 352 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:04:57,037 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:04:57,037 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-01-19 14:04:57,037 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:04:57,300 INFO L129 PetriNetUnfolder]: 71/283 cut-off events. [2022-01-19 14:04:57,300 INFO L130 PetriNetUnfolder]: For 320/332 co-relation queries the response was YES. [2022-01-19 14:04:57,301 INFO L84 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 283 events. 71/283 cut-off events. For 320/332 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1260 event pairs, 34 based on Foata normal form. 4/282 useless extension candidates. Maximal degree in co-relation 676. Up to 105 conditions per place. [2022-01-19 14:04:57,302 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 42 selfloop transitions, 14 changer transitions 9/108 dead transitions. [2022-01-19 14:04:57,302 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 108 transitions, 563 flow [2022-01-19 14:04:57,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-19 14:04:57,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-01-19 14:04:57,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 696 transitions. [2022-01-19 14:04:57,304 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.651685393258427 [2022-01-19 14:04:57,304 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 696 transitions. [2022-01-19 14:04:57,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 696 transitions. [2022-01-19 14:04:57,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:04:57,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 696 transitions. [2022-01-19 14:04:57,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.0) internal successors, (696), 12 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:04:57,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:04:57,307 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:04:57,307 INFO L186 Difference]: Start difference. First operand has 110 places, 86 transitions, 352 flow. Second operand 12 states and 696 transitions. [2022-01-19 14:04:57,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 108 transitions, 563 flow [2022-01-19 14:04:57,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 108 transitions, 526 flow, removed 10 selfloop flow, removed 8 redundant places. [2022-01-19 14:04:57,312 INFO L242 Difference]: Finished difference. Result has 115 places, 86 transitions, 368 flow [2022-01-19 14:04:57,312 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=368, PETRI_PLACES=115, PETRI_TRANSITIONS=86} [2022-01-19 14:04:57,314 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 36 predicate places. [2022-01-19 14:04:57,314 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 86 transitions, 368 flow [2022-01-19 14:04:57,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:04:57,314 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:04:57,315 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 14:04:57,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-19 14:04:57,317 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:04:57,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:04:57,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1009642839, now seen corresponding path program 6 times [2022-01-19 14:04:57,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:04:57,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927591579] [2022-01-19 14:04:57,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:04:57,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:04:57,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:04:57,598 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 14:04:57,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:04:57,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927591579] [2022-01-19 14:04:57,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927591579] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:04:57,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:04:57,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-19 14:04:57,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283666003] [2022-01-19 14:04:57,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:04:57,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-19 14:04:57,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:04:57,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-19 14:04:57,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-01-19 14:04:57,604 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-01-19 14:04:57,604 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 86 transitions, 368 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:04:57,604 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:04:57,604 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-01-19 14:04:57,604 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:04:57,857 INFO L129 PetriNetUnfolder]: 68/248 cut-off events. [2022-01-19 14:04:57,857 INFO L130 PetriNetUnfolder]: For 320/320 co-relation queries the response was YES. [2022-01-19 14:04:57,858 INFO L84 FinitePrefix]: Finished finitePrefix Result has 640 conditions, 248 events. 68/248 cut-off events. For 320/320 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 972 event pairs, 34 based on Foata normal form. 1/244 useless extension candidates. Maximal degree in co-relation 618. Up to 105 conditions per place. [2022-01-19 14:04:57,859 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 34 selfloop transitions, 14 changer transitions 11/102 dead transitions. [2022-01-19 14:04:57,859 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 102 transitions, 547 flow [2022-01-19 14:04:57,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-19 14:04:57,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-01-19 14:04:57,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 690 transitions. [2022-01-19 14:04:57,861 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6460674157303371 [2022-01-19 14:04:57,861 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 690 transitions. [2022-01-19 14:04:57,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 690 transitions. [2022-01-19 14:04:57,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:04:57,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 690 transitions. [2022-01-19 14:04:57,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 57.5) internal successors, (690), 12 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:04:57,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:04:57,864 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:04:57,865 INFO L186 Difference]: Start difference. First operand has 115 places, 86 transitions, 368 flow. Second operand 12 states and 690 transitions. [2022-01-19 14:04:57,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 102 transitions, 547 flow [2022-01-19 14:04:57,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 102 transitions, 499 flow, removed 9 selfloop flow, removed 12 redundant places. [2022-01-19 14:04:57,869 INFO L242 Difference]: Finished difference. Result has 114 places, 85 transitions, 350 flow [2022-01-19 14:04:57,870 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=350, PETRI_PLACES=114, PETRI_TRANSITIONS=85} [2022-01-19 14:04:57,870 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 35 predicate places. [2022-01-19 14:04:57,870 INFO L470 AbstractCegarLoop]: Abstraction has has 114 places, 85 transitions, 350 flow [2022-01-19 14:04:57,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:04:57,871 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:04:57,871 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:04:57,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-19 14:04:57,871 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:04:57,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:04:57,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1492579821, now seen corresponding path program 1 times [2022-01-19 14:04:57,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:04:57,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942645786] [2022-01-19 14:04:57,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:04:57,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:04:57,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:04:58,085 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 14:04:58,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:04:58,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942645786] [2022-01-19 14:04:58,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942645786] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:04:58,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906533283] [2022-01-19 14:04:58,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:04:58,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:04:58,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:04:58,087 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 14:04:58,092 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 14:04:58,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:04:58,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 14:04:58,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:04:58,726 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 14:04:58,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:04:59,279 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 14:04:59,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906533283] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:04:59,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:04:59,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-01-19 14:04:59,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158151210] [2022-01-19 14:04:59,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:04:59,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-19 14:04:59,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:04:59,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-19 14:04:59,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2022-01-19 14:04:59,282 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 14:04:59,283 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 85 transitions, 350 flow. Second operand has 36 states, 36 states have (on average 53.666666666666664) internal successors, (1932), 36 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:04:59,283 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:04:59,283 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 14:04:59,284 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:05:00,834 INFO L129 PetriNetUnfolder]: 168/592 cut-off events. [2022-01-19 14:05:00,835 INFO L130 PetriNetUnfolder]: For 377/377 co-relation queries the response was YES. [2022-01-19 14:05:00,836 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1318 conditions, 592 events. 168/592 cut-off events. For 377/377 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3253 event pairs, 9 based on Foata normal form. 13/605 useless extension candidates. Maximal degree in co-relation 1297. Up to 111 conditions per place. [2022-01-19 14:05:00,839 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 114 selfloop transitions, 82 changer transitions 13/251 dead transitions. [2022-01-19 14:05:00,839 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 251 transitions, 1334 flow [2022-01-19 14:05:00,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-19 14:05:00,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-01-19 14:05:00,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2702 transitions. [2022-01-19 14:05:00,848 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6324906367041199 [2022-01-19 14:05:00,848 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2702 transitions. [2022-01-19 14:05:00,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2702 transitions. [2022-01-19 14:05:00,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:05:00,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2702 transitions. [2022-01-19 14:05:00,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 56.291666666666664) internal successors, (2702), 48 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:00,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 89.0) internal successors, (4361), 49 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:00,860 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 89.0) internal successors, (4361), 49 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:00,860 INFO L186 Difference]: Start difference. First operand has 114 places, 85 transitions, 350 flow. Second operand 48 states and 2702 transitions. [2022-01-19 14:05:00,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 251 transitions, 1334 flow [2022-01-19 14:05:00,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 251 transitions, 1228 flow, removed 24 selfloop flow, removed 16 redundant places. [2022-01-19 14:05:00,865 INFO L242 Difference]: Finished difference. Result has 152 places, 152 transitions, 752 flow [2022-01-19 14:05:00,865 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=752, PETRI_PLACES=152, PETRI_TRANSITIONS=152} [2022-01-19 14:05:00,867 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 73 predicate places. [2022-01-19 14:05:00,868 INFO L470 AbstractCegarLoop]: Abstraction has has 152 places, 152 transitions, 752 flow [2022-01-19 14:05:00,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.666666666666664) internal successors, (1932), 36 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:00,868 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:05:00,868 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:05:00,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-19 14:05:01,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:05:01,084 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:05:01,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:05:01,085 INFO L85 PathProgramCache]: Analyzing trace with hash 330352477, now seen corresponding path program 2 times [2022-01-19 14:05:01,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:05:01,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122348355] [2022-01-19 14:05:01,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:05:01,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:05:01,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:05:01,273 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 14:05:01,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:05:01,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122348355] [2022-01-19 14:05:01,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122348355] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:05:01,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24108908] [2022-01-19 14:05:01,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 14:05:01,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:05:01,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:05:01,275 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 14:05:01,276 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 14:05:01,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:05:01,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:05:01,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 14:05:01,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:05:01,824 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 14:05:01,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:05:02,330 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 14:05:02,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24108908] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:05:02,330 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:05:02,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-01-19 14:05:02,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70859419] [2022-01-19 14:05:02,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:05:02,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-19 14:05:02,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:05:02,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-19 14:05:02,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2022-01-19 14:05:02,338 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 14:05:02,339 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 152 transitions, 752 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:02,340 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:05:02,340 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 14:05:02,340 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:05:03,431 INFO L129 PetriNetUnfolder]: 210/752 cut-off events. [2022-01-19 14:05:03,431 INFO L130 PetriNetUnfolder]: For 677/677 co-relation queries the response was YES. [2022-01-19 14:05:03,433 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2086 conditions, 752 events. 210/752 cut-off events. For 677/677 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4583 event pairs, 22 based on Foata normal form. 1/751 useless extension candidates. Maximal degree in co-relation 2061. Up to 213 conditions per place. [2022-01-19 14:05:03,436 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 100 selfloop transitions, 122 changer transitions 6/270 dead transitions. [2022-01-19 14:05:03,436 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 270 transitions, 1798 flow [2022-01-19 14:05:03,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-19 14:05:03,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-01-19 14:05:03,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2186 transitions. [2022-01-19 14:05:03,439 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6297896859694613 [2022-01-19 14:05:03,439 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2186 transitions. [2022-01-19 14:05:03,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2186 transitions. [2022-01-19 14:05:03,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:05:03,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2186 transitions. [2022-01-19 14:05:03,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 56.05128205128205) internal successors, (2186), 39 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:03,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:03,445 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:03,445 INFO L186 Difference]: Start difference. First operand has 152 places, 152 transitions, 752 flow. Second operand 39 states and 2186 transitions. [2022-01-19 14:05:03,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 270 transitions, 1798 flow [2022-01-19 14:05:03,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 270 transitions, 1645 flow, removed 61 selfloop flow, removed 9 redundant places. [2022-01-19 14:05:03,453 INFO L242 Difference]: Finished difference. Result has 186 places, 205 transitions, 1291 flow [2022-01-19 14:05:03,453 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=665, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1291, PETRI_PLACES=186, PETRI_TRANSITIONS=205} [2022-01-19 14:05:03,454 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 107 predicate places. [2022-01-19 14:05:03,454 INFO L470 AbstractCegarLoop]: Abstraction has has 186 places, 205 transitions, 1291 flow [2022-01-19 14:05:03,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:03,455 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:05:03,455 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:05:03,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-19 14:05:03,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-01-19 14:05:03,670 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:05:03,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:05:03,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1508892007, now seen corresponding path program 3 times [2022-01-19 14:05:03,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:05:03,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890158561] [2022-01-19 14:05:03,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:05:03,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:05:03,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:05:03,856 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 14:05:03,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:05:03,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890158561] [2022-01-19 14:05:03,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890158561] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:05:03,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063894425] [2022-01-19 14:05:03,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 14:05:03,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:05:03,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:05:03,857 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 14:05:03,858 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 14:05:03,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 14:05:03,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:05:03,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 14:05:03,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:05:04,399 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 14:05:04,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:05:04,924 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 14:05:04,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063894425] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:05:04,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:05:04,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-01-19 14:05:04,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239686824] [2022-01-19 14:05:04,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:05:04,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-19 14:05:04,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:05:04,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-19 14:05:04,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1075, Unknown=0, NotChecked=0, Total=1260 [2022-01-19 14:05:04,928 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 14:05:04,929 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 205 transitions, 1291 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:04,929 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:05:04,929 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 14:05:04,929 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:05:08,244 INFO L129 PetriNetUnfolder]: 280/1042 cut-off events. [2022-01-19 14:05:08,245 INFO L130 PetriNetUnfolder]: For 1438/1440 co-relation queries the response was YES. [2022-01-19 14:05:08,248 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3193 conditions, 1042 events. 280/1042 cut-off events. For 1438/1440 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7246 event pairs, 21 based on Foata normal form. 3/1033 useless extension candidates. Maximal degree in co-relation 3162. Up to 147 conditions per place. [2022-01-19 14:05:08,252 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 158 selfloop transitions, 208 changer transitions 6/414 dead transitions. [2022-01-19 14:05:08,252 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 414 transitions, 3181 flow [2022-01-19 14:05:08,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-19 14:05:08,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-01-19 14:05:08,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 4518 transitions. [2022-01-19 14:05:08,257 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6267166042446941 [2022-01-19 14:05:08,257 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 4518 transitions. [2022-01-19 14:05:08,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 4518 transitions. [2022-01-19 14:05:08,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:05:08,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 4518 transitions. [2022-01-19 14:05:08,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 55.77777777777778) internal successors, (4518), 81 states have internal predecessors, (4518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:08,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:08,269 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:08,269 INFO L186 Difference]: Start difference. First operand has 186 places, 205 transitions, 1291 flow. Second operand 81 states and 4518 transitions. [2022-01-19 14:05:08,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 414 transitions, 3181 flow [2022-01-19 14:05:08,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 414 transitions, 3132 flow, removed 18 selfloop flow, removed 8 redundant places. [2022-01-19 14:05:08,281 INFO L242 Difference]: Finished difference. Result has 271 places, 286 transitions, 2375 flow [2022-01-19 14:05:08,282 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1262, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=2375, PETRI_PLACES=271, PETRI_TRANSITIONS=286} [2022-01-19 14:05:08,282 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 192 predicate places. [2022-01-19 14:05:08,282 INFO L470 AbstractCegarLoop]: Abstraction has has 271 places, 286 transitions, 2375 flow [2022-01-19 14:05:08,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:08,283 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:05:08,283 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:05:08,301 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 14:05:08,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:05:08,499 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:05:08,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:05:08,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1951911381, now seen corresponding path program 4 times [2022-01-19 14:05:08,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:05:08,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468639207] [2022-01-19 14:05:08,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:05:08,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:05:08,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:05:08,706 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 14:05:08,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:05:08,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468639207] [2022-01-19 14:05:08,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468639207] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:05:08,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156196677] [2022-01-19 14:05:08,706 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 14:05:08,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:05:08,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:05:08,707 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 14:05:08,709 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 14:05:08,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 14:05:08,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:05:08,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 14:05:08,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:05:09,243 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 14:05:09,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:05:09,754 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 14:05:09,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156196677] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:05:09,754 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:05:09,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-01-19 14:05:09,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860544848] [2022-01-19 14:05:09,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:05:09,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-19 14:05:09,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:05:09,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-19 14:05:09,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1075, Unknown=0, NotChecked=0, Total=1260 [2022-01-19 14:05:09,756 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 14:05:09,758 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 286 transitions, 2375 flow. Second operand has 36 states, 36 states have (on average 53.666666666666664) internal successors, (1932), 36 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:09,758 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:05:09,758 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 14:05:09,758 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:05:12,755 INFO L129 PetriNetUnfolder]: 299/1078 cut-off events. [2022-01-19 14:05:12,755 INFO L130 PetriNetUnfolder]: For 4304/4306 co-relation queries the response was YES. [2022-01-19 14:05:12,759 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4343 conditions, 1078 events. 299/1078 cut-off events. For 4304/4306 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7557 event pairs, 19 based on Foata normal form. 3/1070 useless extension candidates. Maximal degree in co-relation 4298. Up to 157 conditions per place. [2022-01-19 14:05:12,763 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 165 selfloop transitions, 232 changer transitions 6/445 dead transitions. [2022-01-19 14:05:12,763 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 445 transitions, 4361 flow [2022-01-19 14:05:12,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-19 14:05:12,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-01-19 14:05:12,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 4528 transitions. [2022-01-19 14:05:12,767 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6281037591899015 [2022-01-19 14:05:12,767 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 4528 transitions. [2022-01-19 14:05:12,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 4528 transitions. [2022-01-19 14:05:12,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:05:12,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 4528 transitions. [2022-01-19 14:05:12,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 55.901234567901234) internal successors, (4528), 81 states have internal predecessors, (4528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:12,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:12,778 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:12,778 INFO L186 Difference]: Start difference. First operand has 271 places, 286 transitions, 2375 flow. Second operand 81 states and 4528 transitions. [2022-01-19 14:05:12,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 445 transitions, 4361 flow [2022-01-19 14:05:12,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 445 transitions, 4098 flow, removed 74 selfloop flow, removed 19 redundant places. [2022-01-19 14:05:12,798 INFO L242 Difference]: Finished difference. Result has 337 places, 319 transitions, 3031 flow [2022-01-19 14:05:12,799 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=2132, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=3031, PETRI_PLACES=337, PETRI_TRANSITIONS=319} [2022-01-19 14:05:12,799 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 258 predicate places. [2022-01-19 14:05:12,799 INFO L470 AbstractCegarLoop]: Abstraction has has 337 places, 319 transitions, 3031 flow [2022-01-19 14:05:12,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.666666666666664) internal successors, (1932), 36 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:12,800 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:05:12,800 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:05:12,817 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 14:05:13,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:05:13,016 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:05:13,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:05:13,016 INFO L85 PathProgramCache]: Analyzing trace with hash 692524227, now seen corresponding path program 5 times [2022-01-19 14:05:13,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:05:13,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056199747] [2022-01-19 14:05:13,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:05:13,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:05:13,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:05:13,241 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 14:05:13,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:05:13,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056199747] [2022-01-19 14:05:13,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056199747] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:05:13,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997473865] [2022-01-19 14:05:13,242 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 14:05:13,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:05:13,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:05:13,243 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 14:05:13,243 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 14:05:13,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:05:13,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:05:13,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 14:05:13,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:05:13,734 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 14:05:13,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:05:14,153 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 14:05:14,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997473865] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:05:14,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:05:14,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-01-19 14:05:14,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470264965] [2022-01-19 14:05:14,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:05:14,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-19 14:05:14,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:05:14,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-19 14:05:14,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2022-01-19 14:05:14,155 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 14:05:14,156 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 319 transitions, 3031 flow. Second operand has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:14,156 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:05:14,157 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 14:05:14,157 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:05:15,466 INFO L129 PetriNetUnfolder]: 406/1402 cut-off events. [2022-01-19 14:05:15,467 INFO L130 PetriNetUnfolder]: For 8752/8752 co-relation queries the response was YES. [2022-01-19 14:05:15,474 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6431 conditions, 1402 events. 406/1402 cut-off events. For 8752/8752 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10528 event pairs, 22 based on Foata normal form. 1/1397 useless extension candidates. Maximal degree in co-relation 6377. Up to 392 conditions per place. [2022-01-19 14:05:15,480 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 170 selfloop transitions, 249 changer transitions 6/467 dead transitions. [2022-01-19 14:05:15,480 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 467 transitions, 5413 flow [2022-01-19 14:05:15,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-19 14:05:15,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-01-19 14:05:15,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2185 transitions. [2022-01-19 14:05:15,483 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6295015845577643 [2022-01-19 14:05:15,483 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2185 transitions. [2022-01-19 14:05:15,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2185 transitions. [2022-01-19 14:05:15,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:05:15,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2185 transitions. [2022-01-19 14:05:15,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 56.02564102564103) internal successors, (2185), 39 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:15,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:15,488 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:15,489 INFO L186 Difference]: Start difference. First operand has 337 places, 319 transitions, 3031 flow. Second operand 39 states and 2185 transitions. [2022-01-19 14:05:15,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 467 transitions, 5413 flow [2022-01-19 14:05:15,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 467 transitions, 4816 flow, removed 97 selfloop flow, removed 56 redundant places. [2022-01-19 14:05:15,522 INFO L242 Difference]: Finished difference. Result has 326 places, 396 transitions, 4281 flow [2022-01-19 14:05:15,523 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=2620, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=4281, PETRI_PLACES=326, PETRI_TRANSITIONS=396} [2022-01-19 14:05:15,523 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 247 predicate places. [2022-01-19 14:05:15,523 INFO L470 AbstractCegarLoop]: Abstraction has has 326 places, 396 transitions, 4281 flow [2022-01-19 14:05:15,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:15,524 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:05:15,524 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:05:15,541 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 14:05:15,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-19 14:05:15,739 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:05:15,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:05:15,740 INFO L85 PathProgramCache]: Analyzing trace with hash -229897099, now seen corresponding path program 6 times [2022-01-19 14:05:15,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:05:15,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369121524] [2022-01-19 14:05:15,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:05:15,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:05:15,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:05:15,890 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 14:05:15,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:05:15,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369121524] [2022-01-19 14:05:15,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369121524] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:05:15,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027268137] [2022-01-19 14:05:15,891 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 14:05:15,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:05:15,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:05:15,892 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 14:05:15,892 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 14:05:15,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-19 14:05:15,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:05:15,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 14:05:15,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:05:16,402 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 14:05:16,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:05:16,835 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 14:05:16,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027268137] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:05:16,835 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:05:16,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-01-19 14:05:16,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67316253] [2022-01-19 14:05:16,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:05:16,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-19 14:05:16,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:05:16,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-19 14:05:16,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1040, Unknown=0, NotChecked=0, Total=1260 [2022-01-19 14:05:16,837 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 14:05:16,838 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 396 transitions, 4281 flow. Second operand has 36 states, 36 states have (on average 53.611111111111114) internal successors, (1930), 36 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:16,838 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:05:16,839 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 14:05:16,839 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:05:17,895 INFO L129 PetriNetUnfolder]: 406/1417 cut-off events. [2022-01-19 14:05:17,895 INFO L130 PetriNetUnfolder]: For 10316/10316 co-relation queries the response was YES. [2022-01-19 14:05:17,903 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6866 conditions, 1417 events. 406/1417 cut-off events. For 10316/10316 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10763 event pairs, 36 based on Foata normal form. 2/1413 useless extension candidates. Maximal degree in co-relation 6802. Up to 535 conditions per place. [2022-01-19 14:05:17,909 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 151 selfloop transitions, 238 changer transitions 12/443 dead transitions. [2022-01-19 14:05:17,909 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 443 transitions, 5489 flow [2022-01-19 14:05:17,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-19 14:05:17,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-01-19 14:05:17,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1827 transitions. [2022-01-19 14:05:17,911 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6220633299284984 [2022-01-19 14:05:17,911 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1827 transitions. [2022-01-19 14:05:17,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1827 transitions. [2022-01-19 14:05:17,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:05:17,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1827 transitions. [2022-01-19 14:05:17,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 55.36363636363637) internal successors, (1827), 33 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:17,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:17,915 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:17,915 INFO L186 Difference]: Start difference. First operand has 326 places, 396 transitions, 4281 flow. Second operand 33 states and 1827 transitions. [2022-01-19 14:05:17,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 443 transitions, 5489 flow [2022-01-19 14:05:17,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 443 transitions, 5352 flow, removed 43 selfloop flow, removed 12 redundant places. [2022-01-19 14:05:17,966 INFO L242 Difference]: Finished difference. Result has 355 places, 405 transitions, 4946 flow [2022-01-19 14:05:17,977 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=4152, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=4946, PETRI_PLACES=355, PETRI_TRANSITIONS=405} [2022-01-19 14:05:17,978 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 276 predicate places. [2022-01-19 14:05:17,978 INFO L470 AbstractCegarLoop]: Abstraction has has 355 places, 405 transitions, 4946 flow [2022-01-19 14:05:17,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.611111111111114) internal successors, (1930), 36 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:17,978 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:05:17,978 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:05:17,994 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 14:05:18,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:05:18,191 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:05:18,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:05:18,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1819115727, now seen corresponding path program 7 times [2022-01-19 14:05:18,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:05:18,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963749762] [2022-01-19 14:05:18,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:05:18,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:05:18,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:05:18,359 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 14:05:18,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:05:18,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963749762] [2022-01-19 14:05:18,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963749762] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:05:18,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99148271] [2022-01-19 14:05:18,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 14:05:18,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:05:18,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:05:18,361 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 14:05:18,361 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 14:05:18,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:05:18,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 14:05:18,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:05:18,865 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 14:05:18,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:05:19,340 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 14:05:19,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99148271] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:05:19,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:05:19,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-01-19 14:05:19,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143386892] [2022-01-19 14:05:19,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:05:19,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-19 14:05:19,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:05:19,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-19 14:05:19,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2022-01-19 14:05:19,342 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 14:05:19,343 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 405 transitions, 4946 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:19,343 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:05:19,343 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 14:05:19,343 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:05:22,110 INFO L129 PetriNetUnfolder]: 494/1679 cut-off events. [2022-01-19 14:05:22,110 INFO L130 PetriNetUnfolder]: For 13126/13126 co-relation queries the response was YES. [2022-01-19 14:05:22,118 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8926 conditions, 1679 events. 494/1679 cut-off events. For 13126/13126 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13161 event pairs, 26 based on Foata normal form. 1/1673 useless extension candidates. Maximal degree in co-relation 8853. Up to 414 conditions per place. [2022-01-19 14:05:22,125 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 173 selfloop transitions, 385 changer transitions 6/606 dead transitions. [2022-01-19 14:05:22,126 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 606 transitions, 8475 flow [2022-01-19 14:05:22,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-19 14:05:22,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-01-19 14:05:22,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 3882 transitions. [2022-01-19 14:05:22,129 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6231139646869984 [2022-01-19 14:05:22,129 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 3882 transitions. [2022-01-19 14:05:22,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 3882 transitions. [2022-01-19 14:05:22,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:05:22,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 3882 transitions. [2022-01-19 14:05:22,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 55.457142857142856) internal successors, (3882), 70 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:22,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 89.0) internal successors, (6319), 71 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:22,141 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 89.0) internal successors, (6319), 71 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:22,141 INFO L186 Difference]: Start difference. First operand has 355 places, 405 transitions, 4946 flow. Second operand 70 states and 3882 transitions. [2022-01-19 14:05:22,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 606 transitions, 8475 flow [2022-01-19 14:05:22,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 606 transitions, 8137 flow, removed 39 selfloop flow, removed 22 redundant places. [2022-01-19 14:05:22,202 INFO L242 Difference]: Finished difference. Result has 410 places, 528 transitions, 7637 flow [2022-01-19 14:05:22,202 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=4718, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=7637, PETRI_PLACES=410, PETRI_TRANSITIONS=528} [2022-01-19 14:05:22,203 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 331 predicate places. [2022-01-19 14:05:22,203 INFO L470 AbstractCegarLoop]: Abstraction has has 410 places, 528 transitions, 7637 flow [2022-01-19 14:05:22,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:22,203 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:05:22,203 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:05:22,219 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 14:05:22,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:05:22,419 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:05:22,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:05:22,419 INFO L85 PathProgramCache]: Analyzing trace with hash -433616245, now seen corresponding path program 8 times [2022-01-19 14:05:22,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:05:22,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939283161] [2022-01-19 14:05:22,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:05:22,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:05:22,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:05:22,613 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 14:05:22,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:05:22,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939283161] [2022-01-19 14:05:22,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939283161] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:05:22,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894136108] [2022-01-19 14:05:22,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 14:05:22,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:05:22,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:05:22,615 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 14:05:22,616 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 14:05:22,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:05:22,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:05:22,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 14:05:22,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:05:23,100 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 14:05:23,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:05:23,554 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 14:05:23,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894136108] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:05:23,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:05:23,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-01-19 14:05:23,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537475373] [2022-01-19 14:05:23,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:05:23,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-19 14:05:23,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:05:23,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-19 14:05:23,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2022-01-19 14:05:23,556 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 14:05:23,557 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 528 transitions, 7637 flow. Second operand has 36 states, 36 states have (on average 53.611111111111114) internal successors, (1930), 36 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:23,557 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:05:23,557 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 14:05:23,557 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:05:27,657 INFO L129 PetriNetUnfolder]: 590/2044 cut-off events. [2022-01-19 14:05:27,657 INFO L130 PetriNetUnfolder]: For 21449/21449 co-relation queries the response was YES. [2022-01-19 14:05:27,666 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11819 conditions, 2044 events. 590/2044 cut-off events. For 21449/21449 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 17350 event pairs, 22 based on Foata normal form. 2/2036 useless extension candidates. Maximal degree in co-relation 11738. Up to 409 conditions per place. [2022-01-19 14:05:27,676 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 190 selfloop transitions, 484 changer transitions 12/728 dead transitions. [2022-01-19 14:05:27,676 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 728 transitions, 11426 flow [2022-01-19 14:05:27,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-19 14:05:27,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2022-01-19 14:05:27,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 5044 transitions. [2022-01-19 14:05:27,680 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.622792937399679 [2022-01-19 14:05:27,680 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 5044 transitions. [2022-01-19 14:05:27,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 5044 transitions. [2022-01-19 14:05:27,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:05:27,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 5044 transitions. [2022-01-19 14:05:27,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 55.42857142857143) internal successors, (5044), 91 states have internal predecessors, (5044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:27,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 89.0) internal successors, (8188), 92 states have internal predecessors, (8188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:27,695 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 89.0) internal successors, (8188), 92 states have internal predecessors, (8188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:27,695 INFO L186 Difference]: Start difference. First operand has 410 places, 528 transitions, 7637 flow. Second operand 91 states and 5044 transitions. [2022-01-19 14:05:27,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 728 transitions, 11426 flow [2022-01-19 14:05:27,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 728 transitions, 10858 flow, removed 182 selfloop flow, removed 26 redundant places. [2022-01-19 14:05:27,801 INFO L242 Difference]: Finished difference. Result has 487 places, 626 transitions, 9983 flow [2022-01-19 14:05:27,802 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=7151, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=397, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=9983, PETRI_PLACES=487, PETRI_TRANSITIONS=626} [2022-01-19 14:05:27,802 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 408 predicate places. [2022-01-19 14:05:27,802 INFO L470 AbstractCegarLoop]: Abstraction has has 487 places, 626 transitions, 9983 flow [2022-01-19 14:05:27,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.611111111111114) internal successors, (1930), 36 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:27,803 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:05:27,803 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:05:27,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-19 14:05:28,015 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,SelfDestructingSolverStorable14 [2022-01-19 14:05:28,015 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:05:28,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:05:28,016 INFO L85 PathProgramCache]: Analyzing trace with hash -466440371, now seen corresponding path program 9 times [2022-01-19 14:05:28,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:05:28,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590868823] [2022-01-19 14:05:28,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:05:28,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:05:28,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:05:28,206 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 14:05:28,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:05:28,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590868823] [2022-01-19 14:05:28,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590868823] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:05:28,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480859762] [2022-01-19 14:05:28,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 14:05:28,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:05:28,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:05:28,207 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 14:05:28,208 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 14:05:28,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 14:05:28,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:05:28,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 14:05:28,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:05:28,730 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 14:05:28,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:05:29,225 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 14:05:29,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480859762] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:05:29,226 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:05:29,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-01-19 14:05:29,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941397436] [2022-01-19 14:05:29,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:05:29,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-19 14:05:29,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:05:29,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-19 14:05:29,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2022-01-19 14:05:29,228 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 14:05:29,228 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 626 transitions, 9983 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:29,229 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:05:29,229 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 14:05:29,229 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:05:31,644 INFO L129 PetriNetUnfolder]: 638/2144 cut-off events. [2022-01-19 14:05:31,644 INFO L130 PetriNetUnfolder]: For 30839/30841 co-relation queries the response was YES. [2022-01-19 14:05:31,659 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13566 conditions, 2144 events. 638/2144 cut-off events. For 30839/30841 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 18076 event pairs, 34 based on Foata normal form. 2/2136 useless extension candidates. Maximal degree in co-relation 13472. Up to 427 conditions per place. [2022-01-19 14:05:31,668 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 254 selfloop transitions, 451 changer transitions 12/759 dead transitions. [2022-01-19 14:05:31,668 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 759 transitions, 12990 flow [2022-01-19 14:05:31,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-19 14:05:31,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-01-19 14:05:31,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3584 transitions. [2022-01-19 14:05:31,673 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6292134831460674 [2022-01-19 14:05:31,673 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3584 transitions. [2022-01-19 14:05:31,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3584 transitions. [2022-01-19 14:05:31,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:05:31,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3584 transitions. [2022-01-19 14:05:31,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 56.0) internal successors, (3584), 64 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:31,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 89.0) internal successors, (5785), 65 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:31,681 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 89.0) internal successors, (5785), 65 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:31,681 INFO L186 Difference]: Start difference. First operand has 487 places, 626 transitions, 9983 flow. Second operand 64 states and 3584 transitions. [2022-01-19 14:05:31,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 759 transitions, 12990 flow [2022-01-19 14:05:31,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 759 transitions, 11785 flow, removed 313 selfloop flow, removed 60 redundant places. [2022-01-19 14:05:31,845 INFO L242 Difference]: Finished difference. Result has 491 places, 671 transitions, 10859 flow [2022-01-19 14:05:31,846 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=8973, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=407, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=10859, PETRI_PLACES=491, PETRI_TRANSITIONS=671} [2022-01-19 14:05:31,846 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 412 predicate places. [2022-01-19 14:05:31,846 INFO L470 AbstractCegarLoop]: Abstraction has has 491 places, 671 transitions, 10859 flow [2022-01-19 14:05:31,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:31,847 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:05:31,847 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:05:31,862 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 14:05:32,059 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,SelfDestructingSolverStorable15 [2022-01-19 14:05:32,059 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:05:32,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:05:32,060 INFO L85 PathProgramCache]: Analyzing trace with hash 315383393, now seen corresponding path program 10 times [2022-01-19 14:05:32,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:05:32,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971171729] [2022-01-19 14:05:32,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:05:32,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:05:32,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:05:32,236 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 14:05:32,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:05:32,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971171729] [2022-01-19 14:05:32,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971171729] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:05:32,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309903772] [2022-01-19 14:05:32,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 14:05:32,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:05:32,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:05:32,238 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 14:05:32,239 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 14:05:32,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 14:05:32,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:05:32,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 14:05:32,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:05:32,757 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 14:05:32,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:05:33,221 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 14:05:33,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309903772] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:05:33,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:05:33,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-01-19 14:05:33,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013269205] [2022-01-19 14:05:33,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:05:33,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-19 14:05:33,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:05:33,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-19 14:05:33,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2022-01-19 14:05:33,223 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 14:05:33,224 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 671 transitions, 10859 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:33,224 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:05:33,224 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 14:05:33,224 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:05:34,272 INFO L129 PetriNetUnfolder]: 636/2124 cut-off events. [2022-01-19 14:05:34,272 INFO L130 PetriNetUnfolder]: For 26755/26760 co-relation queries the response was YES. [2022-01-19 14:05:34,287 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13414 conditions, 2124 events. 636/2124 cut-off events. For 26755/26760 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 17820 event pairs, 65 based on Foata normal form. 5/2113 useless extension candidates. Maximal degree in co-relation 13323. Up to 864 conditions per place. [2022-01-19 14:05:34,296 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 304 selfloop transitions, 350 changer transitions 6/702 dead transitions. [2022-01-19 14:05:34,296 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 702 transitions, 12545 flow [2022-01-19 14:05:34,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-19 14:05:34,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-01-19 14:05:34,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1503 transitions. [2022-01-19 14:05:34,297 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6254681647940075 [2022-01-19 14:05:34,297 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1503 transitions. [2022-01-19 14:05:34,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1503 transitions. [2022-01-19 14:05:34,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:05:34,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1503 transitions. [2022-01-19 14:05:34,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 55.666666666666664) internal successors, (1503), 27 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:34,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 89.0) internal successors, (2492), 28 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:34,301 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 89.0) internal successors, (2492), 28 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:34,301 INFO L186 Difference]: Start difference. First operand has 491 places, 671 transitions, 10859 flow. Second operand 27 states and 1503 transitions. [2022-01-19 14:05:34,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 702 transitions, 12545 flow [2022-01-19 14:05:34,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 702 transitions, 12136 flow, removed 92 selfloop flow, removed 43 redundant places. [2022-01-19 14:05:34,456 INFO L242 Difference]: Finished difference. Result has 471 places, 677 transitions, 11585 flow [2022-01-19 14:05:34,457 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=10459, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=344, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=11585, PETRI_PLACES=471, PETRI_TRANSITIONS=677} [2022-01-19 14:05:34,457 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 392 predicate places. [2022-01-19 14:05:34,458 INFO L470 AbstractCegarLoop]: Abstraction has has 471 places, 677 transitions, 11585 flow [2022-01-19 14:05:34,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:34,458 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:05:34,458 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:05:34,475 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 14:05:34,673 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,SelfDestructingSolverStorable16 [2022-01-19 14:05:34,673 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:05:34,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:05:34,674 INFO L85 PathProgramCache]: Analyzing trace with hash -998248241, now seen corresponding path program 11 times [2022-01-19 14:05:34,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:05:34,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107462055] [2022-01-19 14:05:34,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:05:34,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:05:34,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:05:34,839 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 14:05:34,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:05:34,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107462055] [2022-01-19 14:05:34,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107462055] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:05:34,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207063899] [2022-01-19 14:05:34,840 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 14:05:34,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:05:34,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:05:34,841 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 14:05:34,842 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 14:05:34,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:05:34,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:05:34,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 14:05:34,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:05:35,366 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 14:05:35,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:05:35,816 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 14:05:35,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207063899] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:05:35,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:05:35,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-01-19 14:05:35,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568789411] [2022-01-19 14:05:35,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:05:35,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-19 14:05:35,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:05:35,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-19 14:05:35,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1100, Unknown=0, NotChecked=0, Total=1332 [2022-01-19 14:05:35,818 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 14:05:35,819 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 677 transitions, 11585 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:35,819 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:05:35,819 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 14:05:35,819 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:05:37,264 INFO L129 PetriNetUnfolder]: 642/2363 cut-off events. [2022-01-19 14:05:37,264 INFO L130 PetriNetUnfolder]: For 32188/32193 co-relation queries the response was YES. [2022-01-19 14:05:37,276 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14630 conditions, 2363 events. 642/2363 cut-off events. For 32188/32193 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21032 event pairs, 57 based on Foata normal form. 5/2362 useless extension candidates. Maximal degree in co-relation 14540. Up to 860 conditions per place. [2022-01-19 14:05:37,285 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 287 selfloop transitions, 387 changer transitions 6/722 dead transitions. [2022-01-19 14:05:37,285 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 722 transitions, 13476 flow [2022-01-19 14:05:37,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-19 14:05:37,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-01-19 14:05:37,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1783 transitions. [2022-01-19 14:05:37,286 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6260533707865169 [2022-01-19 14:05:37,286 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1783 transitions. [2022-01-19 14:05:37,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1783 transitions. [2022-01-19 14:05:37,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:05:37,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1783 transitions. [2022-01-19 14:05:37,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.71875) internal successors, (1783), 32 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:37,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 89.0) internal successors, (2937), 33 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:37,290 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 89.0) internal successors, (2937), 33 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:37,290 INFO L186 Difference]: Start difference. First operand has 471 places, 677 transitions, 11585 flow. Second operand 32 states and 1783 transitions. [2022-01-19 14:05:37,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 722 transitions, 13476 flow [2022-01-19 14:05:37,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 722 transitions, 13180 flow, removed 6 selfloop flow, removed 18 redundant places. [2022-01-19 14:05:37,439 INFO L242 Difference]: Finished difference. Result has 489 places, 689 transitions, 12706 flow [2022-01-19 14:05:37,439 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=11297, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=375, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=12706, PETRI_PLACES=489, PETRI_TRANSITIONS=689} [2022-01-19 14:05:37,440 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 410 predicate places. [2022-01-19 14:05:37,440 INFO L470 AbstractCegarLoop]: Abstraction has has 489 places, 689 transitions, 12706 flow [2022-01-19 14:05:37,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:37,440 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:05:37,440 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:05:37,455 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 14:05:37,640 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,SelfDestructingSolverStorable17 [2022-01-19 14:05:37,641 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:05:37,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:05:37,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1655604447, now seen corresponding path program 12 times [2022-01-19 14:05:37,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:05:37,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410628150] [2022-01-19 14:05:37,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:05:37,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:05:37,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:05:37,840 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 14:05:37,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:05:37,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410628150] [2022-01-19 14:05:37,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410628150] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:05:37,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153417303] [2022-01-19 14:05:37,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 14:05:37,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:05:37,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:05:37,841 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 14:05:37,842 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 14:05:37,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-19 14:05:37,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:05:37,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 14:05:37,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:05:38,374 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 14:05:38,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:05:38,836 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 14:05:38,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153417303] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:05:38,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:05:38,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-01-19 14:05:38,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441326861] [2022-01-19 14:05:38,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:05:38,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-19 14:05:38,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:05:38,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-19 14:05:38,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1124, Unknown=0, NotChecked=0, Total=1332 [2022-01-19 14:05:38,839 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 14:05:38,840 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 689 transitions, 12706 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:38,840 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:05:38,840 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 14:05:38,840 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:05:40,848 INFO L129 PetriNetUnfolder]: 708/2630 cut-off events. [2022-01-19 14:05:40,849 INFO L130 PetriNetUnfolder]: For 41222/41227 co-relation queries the response was YES. [2022-01-19 14:05:40,867 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17207 conditions, 2630 events. 708/2630 cut-off events. For 41222/41227 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 24176 event pairs, 41 based on Foata normal form. 5/2629 useless extension candidates. Maximal degree in co-relation 17112. Up to 693 conditions per place. [2022-01-19 14:05:40,878 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 315 selfloop transitions, 457 changer transitions 6/820 dead transitions. [2022-01-19 14:05:40,878 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 820 transitions, 16270 flow [2022-01-19 14:05:40,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-19 14:05:40,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-01-19 14:05:40,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2573 transitions. [2022-01-19 14:05:40,880 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6284807034684905 [2022-01-19 14:05:40,880 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2573 transitions. [2022-01-19 14:05:40,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2573 transitions. [2022-01-19 14:05:40,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:05:40,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2573 transitions. [2022-01-19 14:05:40,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 55.93478260869565) internal successors, (2573), 46 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:40,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 89.0) internal successors, (4183), 47 states have internal predecessors, (4183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:40,885 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 89.0) internal successors, (4183), 47 states have internal predecessors, (4183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:40,885 INFO L186 Difference]: Start difference. First operand has 489 places, 689 transitions, 12706 flow. Second operand 46 states and 2573 transitions. [2022-01-19 14:05:40,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 820 transitions, 16270 flow [2022-01-19 14:05:41,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 820 transitions, 16139 flow, removed 20 selfloop flow, removed 22 redundant places. [2022-01-19 14:05:41,106 INFO L242 Difference]: Finished difference. Result has 517 places, 742 transitions, 15025 flow [2022-01-19 14:05:41,106 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=12581, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=404, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=15025, PETRI_PLACES=517, PETRI_TRANSITIONS=742} [2022-01-19 14:05:41,106 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 438 predicate places. [2022-01-19 14:05:41,106 INFO L470 AbstractCegarLoop]: Abstraction has has 517 places, 742 transitions, 15025 flow [2022-01-19 14:05:41,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:41,107 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:05:41,107 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:05:41,122 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 14:05:41,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:05:41,307 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:05:41,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:05:41,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1198139793, now seen corresponding path program 13 times [2022-01-19 14:05:41,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:05:41,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762288856] [2022-01-19 14:05:41,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:05:41,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:05:41,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:05:41,501 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 14:05:41,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:05:41,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762288856] [2022-01-19 14:05:41,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762288856] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:05:41,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583279345] [2022-01-19 14:05:41,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 14:05:41,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:05:41,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:05:41,502 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 14:05:41,503 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 14:05:41,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:05:41,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 14:05:41,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:05:42,011 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 14:05:42,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:05:42,462 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 14:05:42,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583279345] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:05:42,463 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:05:42,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-01-19 14:05:42,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513331899] [2022-01-19 14:05:42,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:05:42,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-19 14:05:42,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:05:42,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-19 14:05:42,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1131, Unknown=0, NotChecked=0, Total=1332 [2022-01-19 14:05:42,465 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 14:05:42,466 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 742 transitions, 15025 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:42,466 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:05:42,466 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 14:05:42,466 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:05:45,741 INFO L129 PetriNetUnfolder]: 796/2952 cut-off events. [2022-01-19 14:05:45,741 INFO L130 PetriNetUnfolder]: For 56034/56059 co-relation queries the response was YES. [2022-01-19 14:05:45,763 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20425 conditions, 2952 events. 796/2952 cut-off events. For 56034/56059 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 27940 event pairs, 39 based on Foata normal form. 8/2954 useless extension candidates. Maximal degree in co-relation 20325. Up to 699 conditions per place. [2022-01-19 14:05:45,775 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 263 selfloop transitions, 615 changer transitions 6/926 dead transitions. [2022-01-19 14:05:45,775 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 926 transitions, 19721 flow [2022-01-19 14:05:45,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-19 14:05:45,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-01-19 14:05:45,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 3995 transitions. [2022-01-19 14:05:45,778 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6234394506866417 [2022-01-19 14:05:45,778 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 3995 transitions. [2022-01-19 14:05:45,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 3995 transitions. [2022-01-19 14:05:45,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:05:45,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 3995 transitions. [2022-01-19 14:05:45,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 55.486111111111114) internal successors, (3995), 72 states have internal predecessors, (3995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:45,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 89.0) internal successors, (6497), 73 states have internal predecessors, (6497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:45,785 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 89.0) internal successors, (6497), 73 states have internal predecessors, (6497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:45,785 INFO L186 Difference]: Start difference. First operand has 517 places, 742 transitions, 15025 flow. Second operand 72 states and 3995 transitions. [2022-01-19 14:05:45,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 926 transitions, 19721 flow [2022-01-19 14:05:46,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 560 places, 926 transitions, 19300 flow, removed 49 selfloop flow, removed 25 redundant places. [2022-01-19 14:05:46,052 INFO L242 Difference]: Finished difference. Result has 572 places, 840 transitions, 18614 flow [2022-01-19 14:05:46,052 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=14664, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=521, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=18614, PETRI_PLACES=572, PETRI_TRANSITIONS=840} [2022-01-19 14:05:46,053 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 493 predicate places. [2022-01-19 14:05:46,053 INFO L470 AbstractCegarLoop]: Abstraction has has 572 places, 840 transitions, 18614 flow [2022-01-19 14:05:46,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:46,053 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:05:46,053 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:05:46,069 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 14:05:46,269 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,SelfDestructingSolverStorable19 [2022-01-19 14:05:46,269 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:05:46,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:05:46,269 INFO L85 PathProgramCache]: Analyzing trace with hash -54177703, now seen corresponding path program 14 times [2022-01-19 14:05:46,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:05:46,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103214245] [2022-01-19 14:05:46,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:05:46,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:05:46,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:05:46,436 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 14:05:46,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:05:46,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103214245] [2022-01-19 14:05:46,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103214245] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:05:46,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695064479] [2022-01-19 14:05:46,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 14:05:46,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:05:46,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:05:46,437 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 14:05:46,439 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 14:05:46,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:05:46,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:05:46,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 14:05:46,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:05:46,949 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 14:05:46,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:05:47,374 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 14:05:47,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695064479] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:05:47,374 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:05:47,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-01-19 14:05:47,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093996254] [2022-01-19 14:05:47,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:05:47,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-19 14:05:47,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:05:47,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-19 14:05:47,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1111, Unknown=0, NotChecked=0, Total=1332 [2022-01-19 14:05:47,376 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 14:05:47,377 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 572 places, 840 transitions, 18614 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:47,377 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:05:47,377 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 14:05:47,377 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:05:48,882 INFO L129 PetriNetUnfolder]: 796/2931 cut-off events. [2022-01-19 14:05:48,882 INFO L130 PetriNetUnfolder]: For 63100/63116 co-relation queries the response was YES. [2022-01-19 14:05:48,902 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21820 conditions, 2931 events. 796/2931 cut-off events. For 63100/63116 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 27601 event pairs, 100 based on Foata normal form. 3/2908 useless extension candidates. Maximal degree in co-relation 21712. Up to 1045 conditions per place. [2022-01-19 14:05:48,912 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 361 selfloop transitions, 464 changer transitions 6/873 dead transitions. [2022-01-19 14:05:48,912 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 598 places, 873 transitions, 20686 flow [2022-01-19 14:05:48,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-19 14:05:48,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-01-19 14:05:48,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1666 transitions. [2022-01-19 14:05:48,913 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6239700374531835 [2022-01-19 14:05:48,913 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1666 transitions. [2022-01-19 14:05:48,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1666 transitions. [2022-01-19 14:05:48,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:05:48,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1666 transitions. [2022-01-19 14:05:48,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 55.53333333333333) internal successors, (1666), 30 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:48,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 89.0) internal successors, (2759), 31 states have internal predecessors, (2759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:48,916 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 89.0) internal successors, (2759), 31 states have internal predecessors, (2759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:48,916 INFO L186 Difference]: Start difference. First operand has 572 places, 840 transitions, 18614 flow. Second operand 30 states and 1666 transitions. [2022-01-19 14:05:48,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 598 places, 873 transitions, 20686 flow [2022-01-19 14:05:49,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 558 places, 873 transitions, 19949 flow, removed 80 selfloop flow, removed 40 redundant places. [2022-01-19 14:05:49,235 INFO L242 Difference]: Finished difference. Result has 565 places, 849 transitions, 19336 flow [2022-01-19 14:05:49,235 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=17892, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=840, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=455, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=19336, PETRI_PLACES=565, PETRI_TRANSITIONS=849} [2022-01-19 14:05:49,236 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 486 predicate places. [2022-01-19 14:05:49,236 INFO L470 AbstractCegarLoop]: Abstraction has has 565 places, 849 transitions, 19336 flow [2022-01-19 14:05:49,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:49,236 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:05:49,236 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:05:49,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-19 14:05:49,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:05:49,437 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:05:49,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:05:49,437 INFO L85 PathProgramCache]: Analyzing trace with hash 2075614249, now seen corresponding path program 15 times [2022-01-19 14:05:49,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:05:49,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848860681] [2022-01-19 14:05:49,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:05:49,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:05:49,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:05:49,634 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 14:05:49,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:05:49,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848860681] [2022-01-19 14:05:49,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848860681] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:05:49,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262632484] [2022-01-19 14:05:49,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 14:05:49,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:05:49,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:05:49,635 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 14:05:49,636 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 14:05:49,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 14:05:49,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:05:49,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 14:05:49,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:05:50,137 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 14:05:50,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:05:50,596 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 14:05:50,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262632484] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:05:50,596 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:05:50,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-01-19 14:05:50,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470675840] [2022-01-19 14:05:50,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:05:50,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-19 14:05:50,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:05:50,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-19 14:05:50,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1131, Unknown=0, NotChecked=0, Total=1332 [2022-01-19 14:05:50,598 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 14:05:50,599 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 849 transitions, 19336 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:50,599 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:05:50,599 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 14:05:50,599 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:05:55,519 INFO L129 PetriNetUnfolder]: 915/3385 cut-off events. [2022-01-19 14:05:55,519 INFO L130 PetriNetUnfolder]: For 80574/80583 co-relation queries the response was YES. [2022-01-19 14:05:55,546 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25522 conditions, 3385 events. 915/3385 cut-off events. For 80574/80583 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 33109 event pairs, 52 based on Foata normal form. 4/3375 useless extension candidates. Maximal degree in co-relation 25411. Up to 893 conditions per place. [2022-01-19 14:05:55,560 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 285 selfloop transitions, 763 changer transitions 6/1096 dead transitions. [2022-01-19 14:05:55,560 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 660 places, 1096 transitions, 26202 flow [2022-01-19 14:05:55,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-19 14:05:55,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2022-01-19 14:05:55,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 5464 transitions. [2022-01-19 14:05:55,563 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.62013392350471 [2022-01-19 14:05:55,563 INFO L72 ComplementDD]: Start complementDD. Operand 99 states and 5464 transitions. [2022-01-19 14:05:55,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 5464 transitions. [2022-01-19 14:05:55,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:05:55,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 99 states and 5464 transitions. [2022-01-19 14:05:55,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 100 states, 99 states have (on average 55.19191919191919) internal successors, (5464), 99 states have internal predecessors, (5464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:55,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 100 states, 100 states have (on average 89.0) internal successors, (8900), 100 states have internal predecessors, (8900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:55,573 INFO L81 ComplementDD]: Finished complementDD. Result has 100 states, 100 states have (on average 89.0) internal successors, (8900), 100 states have internal predecessors, (8900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:55,573 INFO L186 Difference]: Start difference. First operand has 565 places, 849 transitions, 19336 flow. Second operand 99 states and 5464 transitions. [2022-01-19 14:05:55,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 660 places, 1096 transitions, 26202 flow [2022-01-19 14:05:56,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 642 places, 1096 transitions, 25760 flow, removed 12 selfloop flow, removed 18 redundant places. [2022-01-19 14:05:56,036 INFO L242 Difference]: Finished difference. Result has 659 places, 1014 transitions, 24999 flow [2022-01-19 14:05:56,037 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=18955, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=849, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=612, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=24999, PETRI_PLACES=659, PETRI_TRANSITIONS=1014} [2022-01-19 14:05:56,037 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 580 predicate places. [2022-01-19 14:05:56,037 INFO L470 AbstractCegarLoop]: Abstraction has has 659 places, 1014 transitions, 24999 flow [2022-01-19 14:05:56,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:56,037 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:05:56,037 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:05:56,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-01-19 14:05:56,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:05:56,238 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:05:56,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:05:56,238 INFO L85 PathProgramCache]: Analyzing trace with hash 796033221, now seen corresponding path program 16 times [2022-01-19 14:05:56,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:05:56,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378183168] [2022-01-19 14:05:56,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:05:56,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:05:56,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:05:56,444 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 14:05:56,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:05:56,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378183168] [2022-01-19 14:05:56,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378183168] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:05:56,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842708823] [2022-01-19 14:05:56,444 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 14:05:56,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:05:56,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:05:56,445 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 14:05:56,446 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 14:05:56,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 14:05:56,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:05:56,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 14:05:56,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:05:56,955 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 14:05:56,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:05:57,428 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 14:05:57,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842708823] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:05:57,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:05:57,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-01-19 14:05:57,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799213039] [2022-01-19 14:05:57,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:05:57,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-19 14:05:57,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:05:57,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-19 14:05:57,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1121, Unknown=0, NotChecked=0, Total=1332 [2022-01-19 14:05:57,431 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 14:05:57,431 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 659 places, 1014 transitions, 24999 flow. Second operand has 37 states, 37 states have (on average 53.62162162162162) internal successors, (1984), 37 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:05:57,432 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:05:57,432 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 14:05:57,432 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:06:01,433 INFO L129 PetriNetUnfolder]: 1104/3894 cut-off events. [2022-01-19 14:06:01,433 INFO L130 PetriNetUnfolder]: For 116802/116811 co-relation queries the response was YES. [2022-01-19 14:06:01,466 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31688 conditions, 3894 events. 1104/3894 cut-off events. For 116802/116811 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 38517 event pairs, 101 based on Foata normal form. 4/3884 useless extension candidates. Maximal degree in co-relation 31562. Up to 955 conditions per place. [2022-01-19 14:06:01,483 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 409 selfloop transitions, 798 changer transitions 6/1255 dead transitions. [2022-01-19 14:06:01,483 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 724 places, 1255 transitions, 32008 flow [2022-01-19 14:06:01,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-19 14:06:01,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-01-19 14:06:01,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 3922 transitions. [2022-01-19 14:06:01,487 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6295345104333868 [2022-01-19 14:06:01,487 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 3922 transitions. [2022-01-19 14:06:01,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 3922 transitions. [2022-01-19 14:06:01,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:06:01,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 3922 transitions. [2022-01-19 14:06:01,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 56.02857142857143) internal successors, (3922), 70 states have internal predecessors, (3922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:01,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 89.0) internal successors, (6319), 71 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:01,495 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 89.0) internal successors, (6319), 71 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:01,495 INFO L186 Difference]: Start difference. First operand has 659 places, 1014 transitions, 24999 flow. Second operand 70 states and 3922 transitions. [2022-01-19 14:06:01,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 724 places, 1255 transitions, 32008 flow [2022-01-19 14:06:02,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 700 places, 1255 transitions, 30845 flow, removed 417 selfloop flow, removed 24 redundant places. [2022-01-19 14:06:02,160 INFO L242 Difference]: Finished difference. Result has 709 places, 1162 transitions, 29702 flow [2022-01-19 14:06:02,162 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=23988, PETRI_DIFFERENCE_MINUEND_PLACES=631, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1013, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=660, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=29702, PETRI_PLACES=709, PETRI_TRANSITIONS=1162} [2022-01-19 14:06:02,162 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 630 predicate places. [2022-01-19 14:06:02,162 INFO L470 AbstractCegarLoop]: Abstraction has has 709 places, 1162 transitions, 29702 flow [2022-01-19 14:06:02,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.62162162162162) internal successors, (1984), 37 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:02,163 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:06:02,163 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:06:02,181 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 14:06:02,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-19 14:06:02,375 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:06:02,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:06:02,376 INFO L85 PathProgramCache]: Analyzing trace with hash 736810587, now seen corresponding path program 17 times [2022-01-19 14:06:02,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:06:02,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092958580] [2022-01-19 14:06:02,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:06:02,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:06:02,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:06:02,539 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 14:06:02,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:06:02,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092958580] [2022-01-19 14:06:02,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092958580] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:06:02,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474930836] [2022-01-19 14:06:02,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 14:06:02,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:06:02,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:06:02,540 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 14:06:02,541 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 14:06:02,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:06:02,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:06:02,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 14:06:02,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:06:03,080 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 14:06:03,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:06:03,517 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 14:06:03,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474930836] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:06:03,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:06:03,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-01-19 14:06:03,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601116802] [2022-01-19 14:06:03,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:06:03,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-19 14:06:03,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:06:03,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-19 14:06:03,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1110, Unknown=0, NotChecked=0, Total=1332 [2022-01-19 14:06:03,519 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 14:06:03,520 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 709 places, 1162 transitions, 29702 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:03,520 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:06:03,520 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 14:06:03,520 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:06:05,790 INFO L129 PetriNetUnfolder]: 1103/3865 cut-off events. [2022-01-19 14:06:05,791 INFO L130 PetriNetUnfolder]: For 124447/124464 co-relation queries the response was YES. [2022-01-19 14:06:05,830 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32951 conditions, 3865 events. 1103/3865 cut-off events. For 124447/124464 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 38227 event pairs, 122 based on Foata normal form. 7/3858 useless extension candidates. Maximal degree in co-relation 32818. Up to 1655 conditions per place. [2022-01-19 14:06:05,849 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 507 selfloop transitions, 632 changer transitions 6/1187 dead transitions. [2022-01-19 14:06:05,849 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 735 places, 1187 transitions, 32376 flow [2022-01-19 14:06:05,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-19 14:06:05,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-01-19 14:06:05,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1827 transitions. [2022-01-19 14:06:05,851 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6220633299284984 [2022-01-19 14:06:05,851 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1827 transitions. [2022-01-19 14:06:05,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1827 transitions. [2022-01-19 14:06:05,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:06:05,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1827 transitions. [2022-01-19 14:06:05,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 55.36363636363637) internal successors, (1827), 33 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:05,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:05,854 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:05,854 INFO L186 Difference]: Start difference. First operand has 709 places, 1162 transitions, 29702 flow. Second operand 33 states and 1827 transitions. [2022-01-19 14:06:05,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 735 places, 1187 transitions, 32376 flow [2022-01-19 14:06:06,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 707 places, 1187 transitions, 31551 flow, removed 205 selfloop flow, removed 28 redundant places. [2022-01-19 14:06:06,638 INFO L242 Difference]: Finished difference. Result has 712 places, 1167 transitions, 30309 flow [2022-01-19 14:06:06,639 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=28881, PETRI_DIFFERENCE_MINUEND_PLACES=675, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=627, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=30309, PETRI_PLACES=712, PETRI_TRANSITIONS=1167} [2022-01-19 14:06:06,640 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 633 predicate places. [2022-01-19 14:06:06,640 INFO L470 AbstractCegarLoop]: Abstraction has has 712 places, 1167 transitions, 30309 flow [2022-01-19 14:06:06,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:06,640 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:06:06,640 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:06:06,656 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 14:06:06,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:06:06,855 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:06:06,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:06:06,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1576843099, now seen corresponding path program 18 times [2022-01-19 14:06:06,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:06:06,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667910429] [2022-01-19 14:06:06,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:06:06,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:06:06,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:06:07,009 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 14:06:07,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:06:07,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667910429] [2022-01-19 14:06:07,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667910429] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:06:07,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430363784] [2022-01-19 14:06:07,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 14:06:07,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:06:07,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:06:07,011 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 14:06:07,012 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 14:06:07,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-19 14:06:07,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:06:07,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 14:06:07,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:06:07,496 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 14:06:07,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:06:07,936 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 14:06:07,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430363784] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:06:07,936 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:06:07,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-01-19 14:06:07,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343900543] [2022-01-19 14:06:07,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:06:07,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-19 14:06:07,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:06:07,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-19 14:06:07,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1107, Unknown=0, NotChecked=0, Total=1332 [2022-01-19 14:06:07,938 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 14:06:07,939 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 712 places, 1167 transitions, 30309 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:07,939 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:06:07,939 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 14:06:07,939 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:06:09,902 INFO L129 PetriNetUnfolder]: 1103/3850 cut-off events. [2022-01-19 14:06:09,903 INFO L130 PetriNetUnfolder]: For 129899/129916 co-relation queries the response was YES. [2022-01-19 14:06:09,941 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33283 conditions, 3850 events. 1103/3850 cut-off events. For 129899/129916 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 38040 event pairs, 148 based on Foata normal form. 7/3827 useless extension candidates. Maximal degree in co-relation 33147. Up to 1432 conditions per place. [2022-01-19 14:06:09,960 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 562 selfloop transitions, 580 changer transitions 6/1190 dead transitions. [2022-01-19 14:06:09,960 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 731 places, 1190 transitions, 32977 flow [2022-01-19 14:06:09,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-19 14:06:09,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-01-19 14:06:09,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1445 transitions. [2022-01-19 14:06:09,962 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6244598098530683 [2022-01-19 14:06:09,962 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1445 transitions. [2022-01-19 14:06:09,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1445 transitions. [2022-01-19 14:06:09,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:06:09,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1445 transitions. [2022-01-19 14:06:09,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 55.57692307692308) internal successors, (1445), 26 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:09,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 89.0) internal successors, (2403), 27 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:09,965 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 89.0) internal successors, (2403), 27 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:09,965 INFO L186 Difference]: Start difference. First operand has 712 places, 1167 transitions, 30309 flow. Second operand 26 states and 1445 transitions. [2022-01-19 14:06:09,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 731 places, 1190 transitions, 32977 flow [2022-01-19 14:06:10,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 708 places, 1190 transitions, 32558 flow, removed 5 selfloop flow, removed 23 redundant places. [2022-01-19 14:06:10,712 INFO L242 Difference]: Finished difference. Result has 712 places, 1170 transitions, 31655 flow [2022-01-19 14:06:10,713 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=29882, PETRI_DIFFERENCE_MINUEND_PLACES=683, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=574, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=31655, PETRI_PLACES=712, PETRI_TRANSITIONS=1170} [2022-01-19 14:06:10,714 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 633 predicate places. [2022-01-19 14:06:10,714 INFO L470 AbstractCegarLoop]: Abstraction has has 712 places, 1170 transitions, 31655 flow [2022-01-19 14:06:10,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:10,715 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:06:10,715 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, 1, 1, 1, 1, 1] [2022-01-19 14:06:10,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-01-19 14:06:10,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:06:10,931 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:06:10,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:06:10,932 INFO L85 PathProgramCache]: Analyzing trace with hash -787992903, now seen corresponding path program 19 times [2022-01-19 14:06:10,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:06:10,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535193513] [2022-01-19 14:06:10,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:06:10,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:06:10,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:06:11,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:11,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:06:11,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535193513] [2022-01-19 14:06:11,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535193513] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:06:11,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631538801] [2022-01-19 14:06:11,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 14:06:11,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:06:11,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:06:11,157 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 14:06:11,158 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 14:06:11,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:06:11,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-19 14:06:11,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:06:11,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:11,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:06:12,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:12,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631538801] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:06:12,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:06:12,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-01-19 14:06:12,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749029173] [2022-01-19 14:06:12,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:06:12,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-19 14:06:12,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:06:12,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-19 14:06:12,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1844, Unknown=0, NotChecked=0, Total=2070 [2022-01-19 14:06:12,360 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 14:06:12,361 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 712 places, 1170 transitions, 31655 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:12,361 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:06:12,361 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 14:06:12,361 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:06:17,852 INFO L129 PetriNetUnfolder]: 1375/4733 cut-off events. [2022-01-19 14:06:17,852 INFO L130 PetriNetUnfolder]: For 177370/177383 co-relation queries the response was YES. [2022-01-19 14:06:17,898 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43260 conditions, 4733 events. 1375/4733 cut-off events. For 177370/177383 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 47605 event pairs, 79 based on Foata normal form. 27/4743 useless extension candidates. Maximal degree in co-relation 43122. Up to 600 conditions per place. [2022-01-19 14:06:17,924 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 562 selfloop transitions, 992 changer transitions 19/1615 dead transitions. [2022-01-19 14:06:17,924 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 800 places, 1615 transitions, 46623 flow [2022-01-19 14:06:17,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-19 14:06:17,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2022-01-19 14:06:17,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 5293 transitions. [2022-01-19 14:06:17,928 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6326798948123357 [2022-01-19 14:06:17,928 INFO L72 ComplementDD]: Start complementDD. Operand 94 states and 5293 transitions. [2022-01-19 14:06:17,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 5293 transitions. [2022-01-19 14:06:17,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:06:17,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 94 states and 5293 transitions. [2022-01-19 14:06:17,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 95 states, 94 states have (on average 56.308510638297875) internal successors, (5293), 94 states have internal predecessors, (5293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:17,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 95 states, 95 states have (on average 89.0) internal successors, (8455), 95 states have internal predecessors, (8455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:17,938 INFO L81 ComplementDD]: Finished complementDD. Result has 95 states, 95 states have (on average 89.0) internal successors, (8455), 95 states have internal predecessors, (8455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:17,938 INFO L186 Difference]: Start difference. First operand has 712 places, 1170 transitions, 31655 flow. Second operand 94 states and 5293 transitions. [2022-01-19 14:06:17,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 800 places, 1615 transitions, 46623 flow [2022-01-19 14:06:18,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 784 places, 1615 transitions, 45911 flow, removed 36 selfloop flow, removed 16 redundant places. [2022-01-19 14:06:18,898 INFO L242 Difference]: Finished difference. Result has 821 places, 1405 transitions, 42026 flow [2022-01-19 14:06:18,899 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=31162, PETRI_DIFFERENCE_MINUEND_PLACES=691, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=784, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=94, PETRI_FLOW=42026, PETRI_PLACES=821, PETRI_TRANSITIONS=1405} [2022-01-19 14:06:18,900 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 742 predicate places. [2022-01-19 14:06:18,900 INFO L470 AbstractCegarLoop]: Abstraction has has 821 places, 1405 transitions, 42026 flow [2022-01-19 14:06:18,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:18,900 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:06:18,901 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, 1, 1, 1, 1, 1] [2022-01-19 14:06:18,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-01-19 14:06:19,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:06:19,104 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:06:19,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:06:19,104 INFO L85 PathProgramCache]: Analyzing trace with hash -35908573, now seen corresponding path program 20 times [2022-01-19 14:06:19,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:06:19,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153467388] [2022-01-19 14:06:19,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:06:19,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:06:19,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:06:19,305 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:19,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:06:19,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153467388] [2022-01-19 14:06:19,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153467388] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:06:19,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958412073] [2022-01-19 14:06:19,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 14:06:19,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:06:19,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:06:19,307 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 14:06:19,308 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 14:06:19,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:06:19,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:06:19,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-19 14:06:19,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:06:19,919 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:19,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:06:20,561 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:20,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958412073] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:06:20,561 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:06:20,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-01-19 14:06:20,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773641191] [2022-01-19 14:06:20,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:06:20,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-19 14:06:20,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:06:20,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-19 14:06:20,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1860, Unknown=0, NotChecked=0, Total=2070 [2022-01-19 14:06:20,564 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 14:06:20,565 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 821 places, 1405 transitions, 42026 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:20,565 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:06:20,565 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 14:06:20,565 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:06:29,036 INFO L129 PetriNetUnfolder]: 1669/5623 cut-off events. [2022-01-19 14:06:29,037 INFO L130 PetriNetUnfolder]: For 311604/311626 co-relation queries the response was YES. [2022-01-19 14:06:29,099 INFO L84 FinitePrefix]: Finished finitePrefix Result has 59142 conditions, 5623 events. 1669/5623 cut-off events. For 311604/311626 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 57932 event pairs, 95 based on Foata normal form. 14/5618 useless extension candidates. Maximal degree in co-relation 58969. Up to 767 conditions per place. [2022-01-19 14:06:29,129 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 524 selfloop transitions, 1356 changer transitions 12/1934 dead transitions. [2022-01-19 14:06:29,129 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 959 places, 1934 transitions, 62327 flow [2022-01-19 14:06:29,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-01-19 14:06:29,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2022-01-19 14:06:29,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 8122 transitions. [2022-01-19 14:06:29,133 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6250577189472064 [2022-01-19 14:06:29,133 INFO L72 ComplementDD]: Start complementDD. Operand 146 states and 8122 transitions. [2022-01-19 14:06:29,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 146 states and 8122 transitions. [2022-01-19 14:06:29,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:06:29,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 146 states and 8122 transitions. [2022-01-19 14:06:29,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 147 states, 146 states have (on average 55.63013698630137) internal successors, (8122), 146 states have internal predecessors, (8122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:29,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 147 states, 147 states have (on average 89.0) internal successors, (13083), 147 states have internal predecessors, (13083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:29,146 INFO L81 ComplementDD]: Finished complementDD. Result has 147 states, 147 states have (on average 89.0) internal successors, (13083), 147 states have internal predecessors, (13083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:29,146 INFO L186 Difference]: Start difference. First operand has 821 places, 1405 transitions, 42026 flow. Second operand 146 states and 8122 transitions. [2022-01-19 14:06:29,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 959 places, 1934 transitions, 62327 flow [2022-01-19 14:06:30,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 913 places, 1934 transitions, 60231 flow, removed 632 selfloop flow, removed 46 redundant places. [2022-01-19 14:06:30,966 INFO L242 Difference]: Finished difference. Result has 944 places, 1717 transitions, 55352 flow [2022-01-19 14:06:30,968 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=40330, PETRI_DIFFERENCE_MINUEND_PLACES=768, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1054, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=146, PETRI_FLOW=55352, PETRI_PLACES=944, PETRI_TRANSITIONS=1717} [2022-01-19 14:06:30,968 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 865 predicate places. [2022-01-19 14:06:30,968 INFO L470 AbstractCegarLoop]: Abstraction has has 944 places, 1717 transitions, 55352 flow [2022-01-19 14:06:30,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:30,968 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:06:30,968 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:06:30,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-01-19 14:06:31,169 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,SelfDestructingSolverStorable26 [2022-01-19 14:06:31,169 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:06:31,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:06:31,169 INFO L85 PathProgramCache]: Analyzing trace with hash -2035220517, now seen corresponding path program 1 times [2022-01-19 14:06:31,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:06:31,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630463288] [2022-01-19 14:06:31,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:06:31,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:06:31,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:06:31,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:31,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:06:31,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630463288] [2022-01-19 14:06:31,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630463288] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:06:31,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800747043] [2022-01-19 14:06:31,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:06:31,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:06:31,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:06:31,344 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 14:06:31,344 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 14:06:31,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:06:31,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-19 14:06:31,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:06:31,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:31,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:06:32,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:32,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800747043] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:06:32,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:06:32,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 37 [2022-01-19 14:06:32,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282852428] [2022-01-19 14:06:32,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:06:32,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-19 14:06:32,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:06:32,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-19 14:06:32,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1174, Unknown=0, NotChecked=0, Total=1332 [2022-01-19 14:06:32,190 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2022-01-19 14:06:32,191 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 944 places, 1717 transitions, 55352 flow. Second operand has 37 states, 37 states have (on average 52.62162162162162) internal successors, (1947), 37 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:32,191 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:06:32,191 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2022-01-19 14:06:32,191 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:06:36,655 INFO L129 PetriNetUnfolder]: 1870/5962 cut-off events. [2022-01-19 14:06:36,655 INFO L130 PetriNetUnfolder]: For 367321/367334 co-relation queries the response was YES. [2022-01-19 14:06:36,734 INFO L84 FinitePrefix]: Finished finitePrefix Result has 64730 conditions, 5962 events. 1870/5962 cut-off events. For 367321/367334 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 60573 event pairs, 281 based on Foata normal form. 12/5948 useless extension candidates. Maximal degree in co-relation 64541. Up to 1607 conditions per place. [2022-01-19 14:06:36,769 INFO L132 encePairwiseOnDemand]: 71/89 looper letters, 706 selfloop transitions, 1066 changer transitions 27/1840 dead transitions. [2022-01-19 14:06:36,769 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 991 places, 1840 transitions, 61147 flow [2022-01-19 14:06:36,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-19 14:06:36,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-01-19 14:06:36,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3004 transitions. [2022-01-19 14:06:36,770 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6250520183104453 [2022-01-19 14:06:36,770 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3004 transitions. [2022-01-19 14:06:36,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3004 transitions. [2022-01-19 14:06:36,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:06:36,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3004 transitions. [2022-01-19 14:06:36,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 55.629629629629626) internal successors, (3004), 54 states have internal predecessors, (3004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:36,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 89.0) internal successors, (4895), 55 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:36,775 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 89.0) internal successors, (4895), 55 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:36,776 INFO L186 Difference]: Start difference. First operand has 944 places, 1717 transitions, 55352 flow. Second operand 54 states and 3004 transitions. [2022-01-19 14:06:36,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 991 places, 1840 transitions, 61147 flow [2022-01-19 14:06:39,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 954 places, 1840 transitions, 58962 flow, removed 658 selfloop flow, removed 37 redundant places. [2022-01-19 14:06:39,307 INFO L242 Difference]: Finished difference. Result has 968 places, 1718 transitions, 55563 flow [2022-01-19 14:06:39,308 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=53278, PETRI_DIFFERENCE_MINUEND_PLACES=901, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1059, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=654, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=55563, PETRI_PLACES=968, PETRI_TRANSITIONS=1718} [2022-01-19 14:06:39,309 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 889 predicate places. [2022-01-19 14:06:39,309 INFO L470 AbstractCegarLoop]: Abstraction has has 968 places, 1718 transitions, 55563 flow [2022-01-19 14:06:39,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 52.62162162162162) internal successors, (1947), 37 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:39,309 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:06:39,309 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, 1, 1, 1, 1, 1] [2022-01-19 14:06:39,325 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 14:06:39,512 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,SelfDestructingSolverStorable27 [2022-01-19 14:06:39,512 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:06:39,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:06:39,513 INFO L85 PathProgramCache]: Analyzing trace with hash 222909999, now seen corresponding path program 21 times [2022-01-19 14:06:39,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:06:39,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358869627] [2022-01-19 14:06:39,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:06:39,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:06:39,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:06:39,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:39,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:06:39,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358869627] [2022-01-19 14:06:39,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358869627] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:06:39,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11988305] [2022-01-19 14:06:39,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 14:06:39,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:06:39,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:06:39,700 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 14:06:39,701 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 14:06:39,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 14:06:39,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:06:39,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-19 14:06:39,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:06:40,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:40,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:06:40,980 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:40,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11988305] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:06:40,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:06:40,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-01-19 14:06:40,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114606827] [2022-01-19 14:06:40,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:06:40,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-19 14:06:40,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:06:40,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-19 14:06:40,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1848, Unknown=0, NotChecked=0, Total=2070 [2022-01-19 14:06:40,983 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 14:06:40,984 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 968 places, 1718 transitions, 55563 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:40,984 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:06:40,984 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 14:06:40,984 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:06:47,590 INFO L129 PetriNetUnfolder]: 1714/5712 cut-off events. [2022-01-19 14:06:47,590 INFO L130 PetriNetUnfolder]: For 367791/367804 co-relation queries the response was YES. [2022-01-19 14:06:47,665 INFO L84 FinitePrefix]: Finished finitePrefix Result has 64678 conditions, 5712 events. 1714/5712 cut-off events. For 367791/367804 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 58756 event pairs, 110 based on Foata normal form. 12/5701 useless extension candidates. Maximal degree in co-relation 64486. Up to 966 conditions per place. [2022-01-19 14:06:47,698 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 539 selfloop transitions, 1328 changer transitions 12/1922 dead transitions. [2022-01-19 14:06:47,698 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1057 places, 1922 transitions, 65089 flow [2022-01-19 14:06:47,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-19 14:06:47,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2022-01-19 14:06:47,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 5929 transitions. [2022-01-19 14:06:47,701 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6225979208232699 [2022-01-19 14:06:47,701 INFO L72 ComplementDD]: Start complementDD. Operand 107 states and 5929 transitions. [2022-01-19 14:06:47,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 5929 transitions. [2022-01-19 14:06:47,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:06:47,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 107 states and 5929 transitions. [2022-01-19 14:06:47,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 108 states, 107 states have (on average 55.41121495327103) internal successors, (5929), 107 states have internal predecessors, (5929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:47,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 108 states, 108 states have (on average 89.0) internal successors, (9612), 108 states have internal predecessors, (9612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:47,710 INFO L81 ComplementDD]: Finished complementDD. Result has 108 states, 108 states have (on average 89.0) internal successors, (9612), 108 states have internal predecessors, (9612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:47,710 INFO L186 Difference]: Start difference. First operand has 968 places, 1718 transitions, 55563 flow. Second operand 107 states and 5929 transitions. [2022-01-19 14:06:47,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1057 places, 1922 transitions, 65089 flow [2022-01-19 14:06:49,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1034 places, 1922 transitions, 64393 flow, removed 106 selfloop flow, removed 23 redundant places. [2022-01-19 14:06:50,041 INFO L242 Difference]: Finished difference. Result has 1051 places, 1792 transitions, 61258 flow [2022-01-19 14:06:50,042 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=55005, PETRI_DIFFERENCE_MINUEND_PLACES=928, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=107, PETRI_FLOW=61258, PETRI_PLACES=1051, PETRI_TRANSITIONS=1792} [2022-01-19 14:06:50,043 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 972 predicate places. [2022-01-19 14:06:50,043 INFO L470 AbstractCegarLoop]: Abstraction has has 1051 places, 1792 transitions, 61258 flow [2022-01-19 14:06:50,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:50,043 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:06:50,043 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, 1, 1, 1, 1, 1] [2022-01-19 14:06:50,061 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 14:06:50,255 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,SelfDestructingSolverStorable28 [2022-01-19 14:06:50,255 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:06:50,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:06:50,256 INFO L85 PathProgramCache]: Analyzing trace with hash -750391429, now seen corresponding path program 22 times [2022-01-19 14:06:50,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:06:50,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857922807] [2022-01-19 14:06:50,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:06:50,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:06:50,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:06:50,481 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:50,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:06:50,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857922807] [2022-01-19 14:06:50,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857922807] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:06:50,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564082588] [2022-01-19 14:06:50,481 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 14:06:50,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:06:50,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:06:50,484 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 14:06:50,485 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 14:06:50,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 14:06:50,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:06:50,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-19 14:06:50,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:06:51,086 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:51,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:06:51,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:06:51,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564082588] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:06:51,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:06:51,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-01-19 14:06:51,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057867472] [2022-01-19 14:06:51,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:06:51,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-19 14:06:51,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:06:51,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-19 14:06:51,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1864, Unknown=0, NotChecked=0, Total=2070 [2022-01-19 14:06:51,727 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 14:06:51,728 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1051 places, 1792 transitions, 61258 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:06:51,728 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:06:51,728 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 14:06:51,728 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:07:08,295 INFO L129 PetriNetUnfolder]: 1942/6507 cut-off events. [2022-01-19 14:07:08,295 INFO L130 PetriNetUnfolder]: For 434152/434165 co-relation queries the response was YES. [2022-01-19 14:07:08,387 INFO L84 FinitePrefix]: Finished finitePrefix Result has 74716 conditions, 6507 events. 1942/6507 cut-off events. For 434152/434165 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 68668 event pairs, 66 based on Foata normal form. 13/6510 useless extension candidates. Maximal degree in co-relation 74516. Up to 846 conditions per place. [2022-01-19 14:07:08,426 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 468 selfloop transitions, 1840 changer transitions 16/2367 dead transitions. [2022-01-19 14:07:08,426 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1291 places, 2367 transitions, 81834 flow [2022-01-19 14:07:08,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 247 states. [2022-01-19 14:07:08,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2022-01-19 14:07:08,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 13706 transitions. [2022-01-19 14:07:08,432 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6234817813765182 [2022-01-19 14:07:08,433 INFO L72 ComplementDD]: Start complementDD. Operand 247 states and 13706 transitions. [2022-01-19 14:07:08,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 247 states and 13706 transitions. [2022-01-19 14:07:08,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:07:08,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 247 states and 13706 transitions. [2022-01-19 14:07:08,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 248 states, 247 states have (on average 55.48987854251012) internal successors, (13706), 247 states have internal predecessors, (13706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:08,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 248 states, 248 states have (on average 89.0) internal successors, (22072), 248 states have internal predecessors, (22072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:08,610 INFO L81 ComplementDD]: Finished complementDD. Result has 248 states, 248 states have (on average 89.0) internal successors, (22072), 248 states have internal predecessors, (22072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:08,610 INFO L186 Difference]: Start difference. First operand has 1051 places, 1792 transitions, 61258 flow. Second operand 247 states and 13706 transitions. [2022-01-19 14:07:08,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1291 places, 2367 transitions, 81834 flow [2022-01-19 14:07:11,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1242 places, 2367 transitions, 80472 flow, removed 181 selfloop flow, removed 49 redundant places. [2022-01-19 14:07:11,549 INFO L242 Difference]: Finished difference. Result has 1278 places, 2099 transitions, 75561 flow [2022-01-19 14:07:11,550 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=60174, PETRI_DIFFERENCE_MINUEND_PLACES=996, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1792, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1554, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=247, PETRI_FLOW=75561, PETRI_PLACES=1278, PETRI_TRANSITIONS=2099} [2022-01-19 14:07:11,550 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1199 predicate places. [2022-01-19 14:07:11,551 INFO L470 AbstractCegarLoop]: Abstraction has has 1278 places, 2099 transitions, 75561 flow [2022-01-19 14:07:11,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:11,551 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:07:11,551 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, 1, 1, 1, 1, 1] [2022-01-19 14:07:11,569 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 14:07:11,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:07:11,763 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:07:11,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:07:11,764 INFO L85 PathProgramCache]: Analyzing trace with hash -243325665, now seen corresponding path program 23 times [2022-01-19 14:07:11,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:07:11,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88958930] [2022-01-19 14:07:11,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:07:11,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:07:11,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:07:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:07:11,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:07:11,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88958930] [2022-01-19 14:07:11,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88958930] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:07:11,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639509870] [2022-01-19 14:07:11,961 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 14:07:11,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:07:11,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:07:11,962 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 14:07:11,962 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 14:07:12,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 14:07:12,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:07:12,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-19 14:07:12,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:07:12,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:07:12,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:07:13,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:07:13,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639509870] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:07:13,139 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:07:13,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-01-19 14:07:13,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443802272] [2022-01-19 14:07:13,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:07:13,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-19 14:07:13,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:07:13,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-19 14:07:13,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1852, Unknown=0, NotChecked=0, Total=2070 [2022-01-19 14:07:13,141 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 14:07:13,142 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1278 places, 2099 transitions, 75561 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:13,142 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:07:13,142 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 14:07:13,142 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:07:22,797 INFO L129 PetriNetUnfolder]: 2148/7040 cut-off events. [2022-01-19 14:07:22,798 INFO L130 PetriNetUnfolder]: For 631282/631295 co-relation queries the response was YES. [2022-01-19 14:07:22,929 INFO L84 FinitePrefix]: Finished finitePrefix Result has 90260 conditions, 7040 events. 2148/7040 cut-off events. For 631282/631295 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 74820 event pairs, 97 based on Foata normal form. 12/7045 useless extension candidates. Maximal degree in co-relation 90031. Up to 1226 conditions per place. [2022-01-19 14:07:22,975 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 651 selfloop transitions, 1781 changer transitions 12/2487 dead transitions. [2022-01-19 14:07:22,975 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1406 places, 2487 transitions, 94703 flow [2022-01-19 14:07:22,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-01-19 14:07:22,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2022-01-19 14:07:22,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 7490 transitions. [2022-01-19 14:07:22,979 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6233874323761964 [2022-01-19 14:07:22,979 INFO L72 ComplementDD]: Start complementDD. Operand 135 states and 7490 transitions. [2022-01-19 14:07:22,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 135 states and 7490 transitions. [2022-01-19 14:07:22,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:07:22,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 135 states and 7490 transitions. [2022-01-19 14:07:22,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 136 states, 135 states have (on average 55.48148148148148) internal successors, (7490), 135 states have internal predecessors, (7490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:22,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 136 states, 136 states have (on average 89.0) internal successors, (12104), 136 states have internal predecessors, (12104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:22,991 INFO L81 ComplementDD]: Finished complementDD. Result has 136 states, 136 states have (on average 89.0) internal successors, (12104), 136 states have internal predecessors, (12104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:22,991 INFO L186 Difference]: Start difference. First operand has 1278 places, 2099 transitions, 75561 flow. Second operand 135 states and 7490 transitions. [2022-01-19 14:07:22,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1406 places, 2487 transitions, 94703 flow [2022-01-19 14:07:28,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1290 places, 2487 transitions, 90902 flow, removed 1029 selfloop flow, removed 116 redundant places. [2022-01-19 14:07:28,154 INFO L242 Difference]: Finished difference. Result has 1313 places, 2334 transitions, 87142 flow [2022-01-19 14:07:28,156 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=72103, PETRI_DIFFERENCE_MINUEND_PLACES=1156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2099, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1552, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=135, PETRI_FLOW=87142, PETRI_PLACES=1313, PETRI_TRANSITIONS=2334} [2022-01-19 14:07:28,156 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1234 predicate places. [2022-01-19 14:07:28,156 INFO L470 AbstractCegarLoop]: Abstraction has has 1313 places, 2334 transitions, 87142 flow [2022-01-19 14:07:28,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:28,157 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:07:28,157 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, 1, 1, 1, 1, 1] [2022-01-19 14:07:28,173 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 14:07:28,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:07:28,359 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:07:28,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:07:28,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1161955117, now seen corresponding path program 24 times [2022-01-19 14:07:28,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:07:28,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616383030] [2022-01-19 14:07:28,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:07:28,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:07:28,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:07:28,541 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:07:28,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:07:28,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616383030] [2022-01-19 14:07:28,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616383030] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:07:28,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23405002] [2022-01-19 14:07:28,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 14:07:28,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:07:28,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:07:28,542 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 14:07:28,543 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 14:07:28,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 14:07:28,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:07:28,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-19 14:07:28,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:07:29,145 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:07:29,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:07:29,760 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:07:29,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23405002] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:07:29,760 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:07:29,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-01-19 14:07:29,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311611457] [2022-01-19 14:07:29,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:07:29,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-19 14:07:29,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:07:29,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-19 14:07:29,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1849, Unknown=0, NotChecked=0, Total=2070 [2022-01-19 14:07:29,762 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 14:07:29,763 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1313 places, 2334 transitions, 87142 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:29,763 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:07:29,763 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 14:07:29,763 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:07:39,122 INFO L129 PetriNetUnfolder]: 2151/7075 cut-off events. [2022-01-19 14:07:39,122 INFO L130 PetriNetUnfolder]: For 645822/645835 co-relation queries the response was YES. [2022-01-19 14:07:39,229 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91690 conditions, 7075 events. 2151/7075 cut-off events. For 645822/645835 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 75459 event pairs, 139 based on Foata normal form. 12/7054 useless extension candidates. Maximal degree in co-relation 91457. Up to 1230 conditions per place. [2022-01-19 14:07:39,274 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 711 selfloop transitions, 1704 changer transitions 12/2470 dead transitions. [2022-01-19 14:07:39,274 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1428 places, 2470 transitions, 95922 flow [2022-01-19 14:07:39,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-19 14:07:39,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2022-01-19 14:07:39,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 6759 transitions. [2022-01-19 14:07:39,277 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6224903297108123 [2022-01-19 14:07:39,277 INFO L72 ComplementDD]: Start complementDD. Operand 122 states and 6759 transitions. [2022-01-19 14:07:39,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 6759 transitions. [2022-01-19 14:07:39,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:07:39,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 122 states and 6759 transitions. [2022-01-19 14:07:39,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 123 states, 122 states have (on average 55.40163934426229) internal successors, (6759), 122 states have internal predecessors, (6759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:39,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 123 states, 123 states have (on average 89.0) internal successors, (10947), 123 states have internal predecessors, (10947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:39,288 INFO L81 ComplementDD]: Finished complementDD. Result has 123 states, 123 states have (on average 89.0) internal successors, (10947), 123 states have internal predecessors, (10947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:39,288 INFO L186 Difference]: Start difference. First operand has 1313 places, 2334 transitions, 87142 flow. Second operand 122 states and 6759 transitions. [2022-01-19 14:07:39,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1428 places, 2470 transitions, 95922 flow [2022-01-19 14:07:44,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1362 places, 2470 transitions, 93248 flow, removed 147 selfloop flow, removed 66 redundant places. [2022-01-19 14:07:44,218 INFO L242 Difference]: Finished difference. Result has 1374 places, 2347 transitions, 89009 flow [2022-01-19 14:07:44,220 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=84519, PETRI_DIFFERENCE_MINUEND_PLACES=1241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1691, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=122, PETRI_FLOW=89009, PETRI_PLACES=1374, PETRI_TRANSITIONS=2347} [2022-01-19 14:07:44,220 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1295 predicate places. [2022-01-19 14:07:44,220 INFO L470 AbstractCegarLoop]: Abstraction has has 1374 places, 2347 transitions, 89009 flow [2022-01-19 14:07:44,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:44,221 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:07:44,221 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, 1, 1, 1, 1, 1] [2022-01-19 14:07:44,237 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 14:07:44,437 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,SelfDestructingSolverStorable31 [2022-01-19 14:07:44,437 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:07:44,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:07:44,437 INFO L85 PathProgramCache]: Analyzing trace with hash -470435579, now seen corresponding path program 25 times [2022-01-19 14:07:44,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:07:44,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109674656] [2022-01-19 14:07:44,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:07:44,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:07:44,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:07:44,639 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:07:44,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:07:44,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109674656] [2022-01-19 14:07:44,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109674656] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:07:44,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221463003] [2022-01-19 14:07:44,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 14:07:44,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:07:44,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:07:44,641 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 14:07:44,642 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 14:07:44,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:07:44,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-19 14:07:44,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:07:45,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:07:45,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:07:45,839 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:07:45,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221463003] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:07:45,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:07:45,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-01-19 14:07:45,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043978641] [2022-01-19 14:07:45,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:07:45,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-19 14:07:45,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:07:45,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-19 14:07:45,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1858, Unknown=0, NotChecked=0, Total=2070 [2022-01-19 14:07:45,842 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 14:07:45,843 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1374 places, 2347 transitions, 89009 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:45,843 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:07:45,843 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 14:07:45,843 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:07:58,954 INFO L129 PetriNetUnfolder]: 2380/7869 cut-off events. [2022-01-19 14:07:58,954 INFO L130 PetriNetUnfolder]: For 732078/732091 co-relation queries the response was YES. [2022-01-19 14:07:59,076 INFO L84 FinitePrefix]: Finished finitePrefix Result has 103271 conditions, 7869 events. 2380/7869 cut-off events. For 732078/732091 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 85575 event pairs, 97 based on Foata normal form. 12/7874 useless extension candidates. Maximal degree in co-relation 103039. Up to 1032 conditions per place. [2022-01-19 14:07:59,127 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 660 selfloop transitions, 2106 changer transitions 12/2821 dead transitions. [2022-01-19 14:07:59,128 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1535 places, 2821 transitions, 111202 flow [2022-01-19 14:07:59,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-01-19 14:07:59,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2022-01-19 14:07:59,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 9368 transitions. [2022-01-19 14:07:59,132 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6265382557517389 [2022-01-19 14:07:59,132 INFO L72 ComplementDD]: Start complementDD. Operand 168 states and 9368 transitions. [2022-01-19 14:07:59,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 168 states and 9368 transitions. [2022-01-19 14:07:59,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:07:59,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 168 states and 9368 transitions. [2022-01-19 14:07:59,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 169 states, 168 states have (on average 55.76190476190476) internal successors, (9368), 168 states have internal predecessors, (9368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:59,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 169 states, 169 states have (on average 89.0) internal successors, (15041), 169 states have internal predecessors, (15041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:59,147 INFO L81 ComplementDD]: Finished complementDD. Result has 169 states, 169 states have (on average 89.0) internal successors, (15041), 169 states have internal predecessors, (15041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:07:59,147 INFO L186 Difference]: Start difference. First operand has 1374 places, 2347 transitions, 89009 flow. Second operand 168 states and 9368 transitions. [2022-01-19 14:07:59,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1535 places, 2821 transitions, 111202 flow [2022-01-19 14:08:04,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1450 places, 2821 transitions, 107401 flow, removed 101 selfloop flow, removed 85 redundant places. [2022-01-19 14:08:04,944 INFO L242 Difference]: Finished difference. Result has 1476 places, 2598 transitions, 101364 flow [2022-01-19 14:08:04,946 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=85631, PETRI_DIFFERENCE_MINUEND_PLACES=1283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1867, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=168, PETRI_FLOW=101364, PETRI_PLACES=1476, PETRI_TRANSITIONS=2598} [2022-01-19 14:08:04,946 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1397 predicate places. [2022-01-19 14:08:04,946 INFO L470 AbstractCegarLoop]: Abstraction has has 1476 places, 2598 transitions, 101364 flow [2022-01-19 14:08:04,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:08:04,947 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:08:04,947 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, 1, 1, 1, 1, 1] [2022-01-19 14:08:04,963 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 14:08:05,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-01-19 14:08:05,148 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:08:05,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:08:05,148 INFO L85 PathProgramCache]: Analyzing trace with hash -865746973, now seen corresponding path program 26 times [2022-01-19 14:08:05,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:08:05,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176305122] [2022-01-19 14:08:05,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:08:05,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:08:05,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:08:05,382 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:08:05,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:08:05,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176305122] [2022-01-19 14:08:05,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176305122] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:08:05,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634160295] [2022-01-19 14:08:05,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 14:08:05,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:08:05,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:08:05,383 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 14:08:05,385 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 14:08:05,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:08:05,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:08:05,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-19 14:08:05,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:08:06,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:08:06,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:08:06,642 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:08:06,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634160295] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:08:06,642 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:08:06,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-01-19 14:08:06,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835098419] [2022-01-19 14:08:06,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:08:06,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-19 14:08:06,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:08:06,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-19 14:08:06,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1869, Unknown=0, NotChecked=0, Total=2070 [2022-01-19 14:08:06,645 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 14:08:06,646 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1476 places, 2598 transitions, 101364 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:08:06,646 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:08:06,646 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 14:08:06,646 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:08:29,284 INFO L129 PetriNetUnfolder]: 3024/9802 cut-off events. [2022-01-19 14:08:29,284 INFO L130 PetriNetUnfolder]: For 1014555/1014568 co-relation queries the response was YES. [2022-01-19 14:08:29,452 INFO L84 FinitePrefix]: Finished finitePrefix Result has 134214 conditions, 9802 events. 3024/9802 cut-off events. For 1014555/1014568 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 110256 event pairs, 88 based on Foata normal form. 12/9805 useless extension candidates. Maximal degree in co-relation 133969. Up to 1327 conditions per place. [2022-01-19 14:08:29,517 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 583 selfloop transitions, 2939 changer transitions 14/3579 dead transitions. [2022-01-19 14:08:29,517 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1741 places, 3579 transitions, 144232 flow [2022-01-19 14:08:29,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 272 states. [2022-01-19 14:08:29,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2022-01-19 14:08:29,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 15150 transitions. [2022-01-19 14:08:29,524 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6258261731658956 [2022-01-19 14:08:29,524 INFO L72 ComplementDD]: Start complementDD. Operand 272 states and 15150 transitions. [2022-01-19 14:08:29,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 272 states and 15150 transitions. [2022-01-19 14:08:29,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:08:29,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 272 states and 15150 transitions. [2022-01-19 14:08:29,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 273 states, 272 states have (on average 55.6985294117647) internal successors, (15150), 272 states have internal predecessors, (15150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:08:29,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 273 states, 273 states have (on average 89.0) internal successors, (24297), 273 states have internal predecessors, (24297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:08:29,552 INFO L81 ComplementDD]: Finished complementDD. Result has 273 states, 273 states have (on average 89.0) internal successors, (24297), 273 states have internal predecessors, (24297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:08:29,552 INFO L186 Difference]: Start difference. First operand has 1476 places, 2598 transitions, 101364 flow. Second operand 272 states and 15150 transitions. [2022-01-19 14:08:29,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1741 places, 3579 transitions, 144232 flow [2022-01-19 14:08:38,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1673 places, 3579 transitions, 142131 flow, removed 702 selfloop flow, removed 68 redundant places. [2022-01-19 14:08:38,774 INFO L242 Difference]: Finished difference. Result has 1721 places, 3260 transitions, 135806 flow [2022-01-19 14:08:38,776 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=99784, PETRI_DIFFERENCE_MINUEND_PLACES=1402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=272, PETRI_FLOW=135806, PETRI_PLACES=1721, PETRI_TRANSITIONS=3260} [2022-01-19 14:08:38,777 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1642 predicate places. [2022-01-19 14:08:38,777 INFO L470 AbstractCegarLoop]: Abstraction has has 1721 places, 3260 transitions, 135806 flow [2022-01-19 14:08:38,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:08:38,777 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:08:38,777 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:08:38,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-19 14:08:38,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:08:38,994 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:08:38,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:08:38,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1977331653, now seen corresponding path program 2 times [2022-01-19 14:08:38,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:08:38,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190766865] [2022-01-19 14:08:38,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:08:38,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:08:39,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:08:39,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:08:39,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:08:39,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190766865] [2022-01-19 14:08:39,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190766865] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:08:39,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892523860] [2022-01-19 14:08:39,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 14:08:39,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:08:39,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:08:39,172 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:08:39,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-19 14:08:39,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:08:39,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:08:39,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-19 14:08:39,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:08:39,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:08:39,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:08:39,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:08:39,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892523860] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:08:39,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:08:39,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 38 [2022-01-19 14:08:39,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407750065] [2022-01-19 14:08:39,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:08:39,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-19 14:08:39,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:08:39,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-19 14:08:39,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1239, Unknown=0, NotChecked=0, Total=1406 [2022-01-19 14:08:39,992 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2022-01-19 14:08:39,993 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1721 places, 3260 transitions, 135806 flow. Second operand has 38 states, 38 states have (on average 52.60526315789474) internal successors, (1999), 38 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:08:39,993 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:08:39,993 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2022-01-19 14:08:39,993 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:08:54,349 INFO L129 PetriNetUnfolder]: 3492/10806 cut-off events. [2022-01-19 14:08:54,350 INFO L130 PetriNetUnfolder]: For 1405621/1405634 co-relation queries the response was YES. [2022-01-19 14:08:54,558 INFO L84 FinitePrefix]: Finished finitePrefix Result has 157020 conditions, 10806 events. 3492/10806 cut-off events. For 1405621/1405634 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 121271 event pairs, 512 based on Foata normal form. 16/10778 useless extension candidates. Maximal degree in co-relation 156734. Up to 3866 conditions per place. [2022-01-19 14:08:54,631 INFO L132 encePairwiseOnDemand]: 70/89 looper letters, 1378 selfloop transitions, 2048 changer transitions 32/3499 dead transitions. [2022-01-19 14:08:54,631 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1796 places, 3499 transitions, 152106 flow [2022-01-19 14:08:54,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-19 14:08:54,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2022-01-19 14:08:54,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 4518 transitions. [2022-01-19 14:08:54,633 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.619073718827076 [2022-01-19 14:08:54,633 INFO L72 ComplementDD]: Start complementDD. Operand 82 states and 4518 transitions. [2022-01-19 14:08:54,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 4518 transitions. [2022-01-19 14:08:54,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:08:54,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 82 states and 4518 transitions. [2022-01-19 14:08:54,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 83 states, 82 states have (on average 55.09756097560975) internal successors, (4518), 82 states have internal predecessors, (4518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:08:54,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 83 states, 83 states have (on average 89.0) internal successors, (7387), 83 states have internal predecessors, (7387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:08:54,640 INFO L81 ComplementDD]: Finished complementDD. Result has 83 states, 83 states have (on average 89.0) internal successors, (7387), 83 states have internal predecessors, (7387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:08:54,640 INFO L186 Difference]: Start difference. First operand has 1721 places, 3260 transitions, 135806 flow. Second operand 82 states and 4518 transitions. [2022-01-19 14:08:54,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1796 places, 3499 transitions, 152106 flow [2022-01-19 14:09:08,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1714 places, 3499 transitions, 148068 flow, removed 1563 selfloop flow, removed 82 redundant places. [2022-01-19 14:09:09,036 INFO L242 Difference]: Finished difference. Result has 1733 places, 3368 transitions, 142543 flow [2022-01-19 14:09:09,039 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=132041, PETRI_DIFFERENCE_MINUEND_PLACES=1633, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1934, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=142543, PETRI_PLACES=1733, PETRI_TRANSITIONS=3368} [2022-01-19 14:09:09,039 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1654 predicate places. [2022-01-19 14:09:09,039 INFO L470 AbstractCegarLoop]: Abstraction has has 1733 places, 3368 transitions, 142543 flow [2022-01-19 14:09:09,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 52.60526315789474) internal successors, (1999), 38 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:09:09,040 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:09:09,040 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:09:09,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-19 14:09:09,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:09:09,255 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:09:09,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:09:09,256 INFO L85 PathProgramCache]: Analyzing trace with hash 997651439, now seen corresponding path program 3 times [2022-01-19 14:09:09,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:09:09,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169642940] [2022-01-19 14:09:09,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:09:09,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:09:09,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:09:09,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:09:09,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:09:09,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169642940] [2022-01-19 14:09:09,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169642940] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:09:09,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339627888] [2022-01-19 14:09:09,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 14:09:09,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:09:09,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:09:09,442 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:09:09,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-19 14:09:09,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 14:09:09,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:09:09,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-19 14:09:09,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:09:09,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:09:09,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:09:10,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:09:10,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339627888] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:09:10,290 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:09:10,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 38 [2022-01-19 14:09:10,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177743282] [2022-01-19 14:09:10,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:09:10,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-19 14:09:10,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:09:10,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-19 14:09:10,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1238, Unknown=0, NotChecked=0, Total=1406 [2022-01-19 14:09:10,292 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2022-01-19 14:09:10,293 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1733 places, 3368 transitions, 142543 flow. Second operand has 38 states, 38 states have (on average 52.63157894736842) internal successors, (2000), 38 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:09:10,293 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:09:10,293 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2022-01-19 14:09:10,293 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:09:26,377 INFO L129 PetriNetUnfolder]: 3495/10779 cut-off events. [2022-01-19 14:09:26,378 INFO L130 PetriNetUnfolder]: For 1454752/1454765 co-relation queries the response was YES. [2022-01-19 14:09:26,629 INFO L84 FinitePrefix]: Finished finitePrefix Result has 160484 conditions, 10779 events. 3495/10779 cut-off events. For 1454752/1454765 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 120764 event pairs, 480 based on Foata normal form. 20/10765 useless extension candidates. Maximal degree in co-relation 160191. Up to 3876 conditions per place. [2022-01-19 14:09:26,706 INFO L132 encePairwiseOnDemand]: 70/89 looper letters, 1310 selfloop transitions, 2118 changer transitions 42/3511 dead transitions. [2022-01-19 14:09:26,706 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1800 places, 3511 transitions, 153571 flow [2022-01-19 14:09:26,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-19 14:09:26,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2022-01-19 14:09:26,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 4631 transitions. [2022-01-19 14:09:26,711 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6194489031567684 [2022-01-19 14:09:26,712 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 4631 transitions. [2022-01-19 14:09:26,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 4631 transitions. [2022-01-19 14:09:26,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:09:26,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 4631 transitions. [2022-01-19 14:09:26,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 55.13095238095238) internal successors, (4631), 84 states have internal predecessors, (4631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:09:26,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 89.0) internal successors, (7565), 85 states have internal predecessors, (7565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:09:26,719 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 89.0) internal successors, (7565), 85 states have internal predecessors, (7565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:09:26,719 INFO L186 Difference]: Start difference. First operand has 1733 places, 3368 transitions, 142543 flow. Second operand 84 states and 4631 transitions. [2022-01-19 14:09:26,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1800 places, 3511 transitions, 153571 flow [2022-01-19 14:09:41,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1751 places, 3511 transitions, 151568 flow, removed 189 selfloop flow, removed 49 redundant places. [2022-01-19 14:09:41,214 INFO L242 Difference]: Finished difference. Result has 1765 places, 3366 transitions, 145374 flow [2022-01-19 14:09:41,217 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=140816, PETRI_DIFFERENCE_MINUEND_PLACES=1668, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2097, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=145374, PETRI_PLACES=1765, PETRI_TRANSITIONS=3366} [2022-01-19 14:09:41,217 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1686 predicate places. [2022-01-19 14:09:41,217 INFO L470 AbstractCegarLoop]: Abstraction has has 1765 places, 3366 transitions, 145374 flow [2022-01-19 14:09:41,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 52.63157894736842) internal successors, (2000), 38 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:09:41,218 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:09:41,218 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:09:41,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-19 14:09:41,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:09:41,418 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:09:41,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:09:41,419 INFO L85 PathProgramCache]: Analyzing trace with hash -30717033, now seen corresponding path program 4 times [2022-01-19 14:09:41,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:09:41,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002396665] [2022-01-19 14:09:41,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:09:41,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:09:41,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:09:41,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:09:41,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:09:41,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002396665] [2022-01-19 14:09:41,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002396665] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:09:41,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223226741] [2022-01-19 14:09:41,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 14:09:41,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:09:41,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:09:41,587 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:09:41,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-19 14:09:41,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 14:09:41,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:09:41,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-19 14:09:41,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:09:42,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:09:42,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:09:42,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:09:42,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223226741] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:09:42,503 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:09:42,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 38 [2022-01-19 14:09:42,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676994944] [2022-01-19 14:09:42,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:09:42,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-19 14:09:42,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:09:42,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-19 14:09:42,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1247, Unknown=0, NotChecked=0, Total=1406 [2022-01-19 14:09:42,509 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2022-01-19 14:09:42,510 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1765 places, 3366 transitions, 145374 flow. Second operand has 38 states, 38 states have (on average 52.60526315789474) internal successors, (1999), 38 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:09:42,510 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:09:42,510 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2022-01-19 14:09:42,510 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:10:00,818 INFO L129 PetriNetUnfolder]: 4103/12122 cut-off events. [2022-01-19 14:10:00,818 INFO L130 PetriNetUnfolder]: For 1723040/1723053 co-relation queries the response was YES. [2022-01-19 14:10:01,172 INFO L84 FinitePrefix]: Finished finitePrefix Result has 190381 conditions, 12122 events. 4103/12122 cut-off events. For 1723040/1723053 co-relation queries the response was YES. Maximal size of possible extension queue 803. Compared 135746 event pairs, 327 based on Foata normal form. 69/12160 useless extension candidates. Maximal degree in co-relation 190087. Up to 2986 conditions per place. [2022-01-19 14:10:01,264 INFO L132 encePairwiseOnDemand]: 70/89 looper letters, 1299 selfloop transitions, 3130 changer transitions 70/4540 dead transitions. [2022-01-19 14:10:01,264 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1873 places, 4540 transitions, 203405 flow [2022-01-19 14:10:01,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-01-19 14:10:01,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2022-01-19 14:10:01,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 7481 transitions. [2022-01-19 14:10:01,268 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6180601454064772 [2022-01-19 14:10:01,268 INFO L72 ComplementDD]: Start complementDD. Operand 136 states and 7481 transitions. [2022-01-19 14:10:01,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 136 states and 7481 transitions. [2022-01-19 14:10:01,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:10:01,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 136 states and 7481 transitions. [2022-01-19 14:10:01,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 137 states, 136 states have (on average 55.00735294117647) internal successors, (7481), 136 states have internal predecessors, (7481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:10:01,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 137 states, 137 states have (on average 89.0) internal successors, (12193), 137 states have internal predecessors, (12193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:10:01,279 INFO L81 ComplementDD]: Finished complementDD. Result has 137 states, 137 states have (on average 89.0) internal successors, (12193), 137 states have internal predecessors, (12193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:10:01,279 INFO L186 Difference]: Start difference. First operand has 1765 places, 3366 transitions, 145374 flow. Second operand 136 states and 7481 transitions. [2022-01-19 14:10:01,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1873 places, 4540 transitions, 203405 flow [2022-01-19 14:10:18,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1805 places, 4540 transitions, 197834 flow, removed 127 selfloop flow, removed 68 redundant places. [2022-01-19 14:10:18,984 INFO L242 Difference]: Finished difference. Result has 1836 places, 4131 transitions, 186190 flow [2022-01-19 14:10:18,986 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=141077, PETRI_DIFFERENCE_MINUEND_PLACES=1670, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2411, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=883, PETRI_DIFFERENCE_SUBTRAHEND_STATES=136, PETRI_FLOW=186190, PETRI_PLACES=1836, PETRI_TRANSITIONS=4131} [2022-01-19 14:10:18,987 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1757 predicate places. [2022-01-19 14:10:18,987 INFO L470 AbstractCegarLoop]: Abstraction has has 1836 places, 4131 transitions, 186190 flow [2022-01-19 14:10:18,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 52.60526315789474) internal successors, (1999), 38 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:10:18,987 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:10:18,987 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:10:19,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-19 14:10:19,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-01-19 14:10:19,188 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:10:19,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:10:19,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1638313843, now seen corresponding path program 5 times [2022-01-19 14:10:19,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:10:19,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595975653] [2022-01-19 14:10:19,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:10:19,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:10:19,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:10:19,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:10:19,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:10:19,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595975653] [2022-01-19 14:10:19,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595975653] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:10:19,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842883534] [2022-01-19 14:10:19,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 14:10:19,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:10:19,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:10:19,408 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:10:19,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-19 14:10:19,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 14:10:19,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:10:19,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-19 14:10:19,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:10:19,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:10:19,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:10:20,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:10:20,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842883534] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:10:20,313 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:10:20,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 38 [2022-01-19 14:10:20,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274931134] [2022-01-19 14:10:20,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:10:20,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-19 14:10:20,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:10:20,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-19 14:10:20,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1225, Unknown=0, NotChecked=0, Total=1406 [2022-01-19 14:10:20,315 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2022-01-19 14:10:20,315 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1836 places, 4131 transitions, 186190 flow. Second operand has 38 states, 38 states have (on average 52.578947368421055) internal successors, (1998), 38 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:10:20,315 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:10:20,316 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2022-01-19 14:10:20,316 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:10:40,312 INFO L129 PetriNetUnfolder]: 4122/12159 cut-off events. [2022-01-19 14:10:40,312 INFO L130 PetriNetUnfolder]: For 2036452/2036465 co-relation queries the response was YES. [2022-01-19 14:10:40,598 INFO L84 FinitePrefix]: Finished finitePrefix Result has 204849 conditions, 12159 events. 4122/12159 cut-off events. For 2036452/2036465 co-relation queries the response was YES. Maximal size of possible extension queue 764. Compared 135225 event pairs, 427 based on Foata normal form. 62/12185 useless extension candidates. Maximal degree in co-relation 204535. Up to 2546 conditions per place. [2022-01-19 14:10:40,773 INFO L132 encePairwiseOnDemand]: 71/89 looper letters, 2142 selfloop transitions, 2290 changer transitions 32/4505 dead transitions. [2022-01-19 14:10:40,773 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1913 places, 4505 transitions, 209546 flow [2022-01-19 14:10:40,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-19 14:10:40,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2022-01-19 14:10:40,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 5041 transitions. [2022-01-19 14:10:40,776 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6224225212989258 [2022-01-19 14:10:40,776 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 5041 transitions. [2022-01-19 14:10:40,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 5041 transitions. [2022-01-19 14:10:40,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:10:40,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 5041 transitions. [2022-01-19 14:10:40,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 55.395604395604394) internal successors, (5041), 91 states have internal predecessors, (5041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:10:40,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 89.0) internal successors, (8188), 92 states have internal predecessors, (8188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:10:40,783 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 89.0) internal successors, (8188), 92 states have internal predecessors, (8188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:10:40,783 INFO L186 Difference]: Start difference. First operand has 1836 places, 4131 transitions, 186190 flow. Second operand 91 states and 5041 transitions. [2022-01-19 14:10:40,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1913 places, 4505 transitions, 209546 flow [2022-01-19 14:11:03,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1845 places, 4505 transitions, 203557 flow, removed 1099 selfloop flow, removed 68 redundant places. [2022-01-19 14:11:03,458 INFO L242 Difference]: Finished difference. Result has 1866 places, 4227 transitions, 193294 flow [2022-01-19 14:11:03,462 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=179695, PETRI_DIFFERENCE_MINUEND_PLACES=1755, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1899, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=193294, PETRI_PLACES=1866, PETRI_TRANSITIONS=4227} [2022-01-19 14:11:03,462 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1787 predicate places. [2022-01-19 14:11:03,462 INFO L470 AbstractCegarLoop]: Abstraction has has 1866 places, 4227 transitions, 193294 flow [2022-01-19 14:11:03,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 52.578947368421055) internal successors, (1998), 38 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:11:03,462 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:11:03,462 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:11:03,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-19 14:11:03,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-01-19 14:11:03,679 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:11:03,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:11:03,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1335438405, now seen corresponding path program 6 times [2022-01-19 14:11:03,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:11:03,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415637434] [2022-01-19 14:11:03,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:11:03,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:11:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:11:03,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:11:03,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:11:03,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415637434] [2022-01-19 14:11:03,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415637434] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:11:03,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120871789] [2022-01-19 14:11:03,858 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 14:11:03,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:11:03,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:11:03,859 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:11:03,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-19 14:11:03,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-19 14:11:03,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:11:03,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-19 14:11:03,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:11:04,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:11:04,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:11:04,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:11:04,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120871789] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:11:04,743 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:11:04,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 38 [2022-01-19 14:11:04,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220742273] [2022-01-19 14:11:04,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:11:04,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-19 14:11:04,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:11:04,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-19 14:11:04,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1231, Unknown=0, NotChecked=0, Total=1406 [2022-01-19 14:11:04,745 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2022-01-19 14:11:04,745 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1866 places, 4227 transitions, 193294 flow. Second operand has 38 states, 38 states have (on average 52.63157894736842) internal successors, (2000), 38 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:11:04,745 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:11:04,745 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2022-01-19 14:11:04,746 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:11:28,630 INFO L129 PetriNetUnfolder]: 4159/12175 cut-off events. [2022-01-19 14:11:28,630 INFO L130 PetriNetUnfolder]: For 2073529/2073542 co-relation queries the response was YES. [2022-01-19 14:11:28,905 INFO L84 FinitePrefix]: Finished finitePrefix Result has 203772 conditions, 12175 events. 4159/12175 cut-off events. For 2073529/2073542 co-relation queries the response was YES. Maximal size of possible extension queue 757. Compared 135141 event pairs, 381 based on Foata normal form. 20/12162 useless extension candidates. Maximal degree in co-relation 203449. Up to 2727 conditions per place. [2022-01-19 14:11:29,003 INFO L132 encePairwiseOnDemand]: 70/89 looper letters, 1283 selfloop transitions, 3398 changer transitions 27/4749 dead transitions. [2022-01-19 14:11:29,003 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 2007 places, 4749 transitions, 220714 flow [2022-01-19 14:11:29,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2022-01-19 14:11:29,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2022-01-19 14:11:29,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 8131 transitions. [2022-01-19 14:11:29,011 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6172942605526875 [2022-01-19 14:11:29,011 INFO L72 ComplementDD]: Start complementDD. Operand 148 states and 8131 transitions. [2022-01-19 14:11:29,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 148 states and 8131 transitions. [2022-01-19 14:11:29,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:11:29,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 148 states and 8131 transitions. [2022-01-19 14:11:29,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 149 states, 148 states have (on average 54.939189189189186) internal successors, (8131), 148 states have internal predecessors, (8131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:11:29,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 149 states, 149 states have (on average 89.0) internal successors, (13261), 149 states have internal predecessors, (13261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:11:29,023 INFO L81 ComplementDD]: Finished complementDD. Result has 149 states, 149 states have (on average 89.0) internal successors, (13261), 149 states have internal predecessors, (13261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:11:29,023 INFO L186 Difference]: Start difference. First operand has 1866 places, 4227 transitions, 193294 flow. Second operand 148 states and 8131 transitions. [2022-01-19 14:11:29,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 2007 places, 4749 transitions, 220714 flow [2022-01-19 14:11:52,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1956 places, 4749 transitions, 218423 flow, removed 516 selfloop flow, removed 51 redundant places. [2022-01-19 14:11:52,440 INFO L242 Difference]: Finished difference. Result has 1971 places, 4369 transitions, 205779 flow [2022-01-19 14:11:52,443 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=191193, PETRI_DIFFERENCE_MINUEND_PLACES=1809, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=956, PETRI_DIFFERENCE_SUBTRAHEND_STATES=148, PETRI_FLOW=205779, PETRI_PLACES=1971, PETRI_TRANSITIONS=4369} [2022-01-19 14:11:52,443 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1892 predicate places. [2022-01-19 14:11:52,443 INFO L470 AbstractCegarLoop]: Abstraction has has 1971 places, 4369 transitions, 205779 flow [2022-01-19 14:11:52,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 52.63157894736842) internal successors, (2000), 38 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:11:52,444 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:11:52,444 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, 1, 1, 1, 1, 1] [2022-01-19 14:11:52,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-01-19 14:11:52,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-19 14:11:52,659 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:11:52,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:11:52,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1262583333, now seen corresponding path program 27 times [2022-01-19 14:11:52,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:11:52,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838089251] [2022-01-19 14:11:52,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:11:52,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:11:52,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:11:52,848 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:11:52,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:11:52,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838089251] [2022-01-19 14:11:52,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838089251] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:11:52,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505094313] [2022-01-19 14:11:52,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 14:11:52,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:11:52,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:11:52,849 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:11:52,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-19 14:11:52,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 14:11:52,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:11:52,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-19 14:11:52,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:11:53,463 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:11:53,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:11:54,073 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:11:54,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505094313] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:11:54,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:11:54,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-01-19 14:11:54,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041413593] [2022-01-19 14:11:54,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:11:54,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-19 14:11:54,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:11:54,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-19 14:11:54,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1865, Unknown=0, NotChecked=0, Total=2070 [2022-01-19 14:11:54,075 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 14:11:54,076 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1971 places, 4369 transitions, 205779 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:11:54,076 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:11:54,076 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 14:11:54,076 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:12:17,359 INFO L129 PetriNetUnfolder]: 4411/12980 cut-off events. [2022-01-19 14:12:17,359 INFO L130 PetriNetUnfolder]: For 2395359/2395464 co-relation queries the response was YES. [2022-01-19 14:12:17,666 INFO L84 FinitePrefix]: Finished finitePrefix Result has 229195 conditions, 12980 events. 4411/12980 cut-off events. For 2395359/2395464 co-relation queries the response was YES. Maximal size of possible extension queue 818. Compared 146099 event pairs, 300 based on Foata normal form. 29/12938 useless extension candidates. Maximal degree in co-relation 228863. Up to 4093 conditions per place. [2022-01-19 14:12:17,778 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 1816 selfloop transitions, 3296 changer transitions 12/5194 dead transitions. [2022-01-19 14:12:17,778 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 2043 places, 5194 transitions, 257080 flow [2022-01-19 14:12:17,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-19 14:12:17,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2022-01-19 14:12:17,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 4929 transitions. [2022-01-19 14:12:17,781 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6222699154147203 [2022-01-19 14:12:17,781 INFO L72 ComplementDD]: Start complementDD. Operand 89 states and 4929 transitions. [2022-01-19 14:12:17,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 89 states and 4929 transitions. [2022-01-19 14:12:17,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:12:17,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 89 states and 4929 transitions. [2022-01-19 14:12:17,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 90 states, 89 states have (on average 55.38202247191011) internal successors, (4929), 89 states have internal predecessors, (4929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:12:17,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 90 states, 90 states have (on average 89.0) internal successors, (8010), 90 states have internal predecessors, (8010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:12:17,788 INFO L81 ComplementDD]: Finished complementDD. Result has 90 states, 90 states have (on average 89.0) internal successors, (8010), 90 states have internal predecessors, (8010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:12:17,788 INFO L186 Difference]: Start difference. First operand has 1971 places, 4369 transitions, 205779 flow. Second operand 89 states and 4929 transitions. [2022-01-19 14:12:17,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 2043 places, 5194 transitions, 257080 flow [2022-01-19 14:12:47,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1939 places, 5194 transitions, 250094 flow, removed 1492 selfloop flow, removed 104 redundant places. [2022-01-19 14:12:47,534 INFO L242 Difference]: Finished difference. Result has 1965 places, 4972 transitions, 242580 flow [2022-01-19 14:12:47,537 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=201235, PETRI_DIFFERENCE_MINUEND_PLACES=1851, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2728, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=89, PETRI_FLOW=242580, PETRI_PLACES=1965, PETRI_TRANSITIONS=4972} [2022-01-19 14:12:47,538 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1886 predicate places. [2022-01-19 14:12:47,538 INFO L470 AbstractCegarLoop]: Abstraction has has 1965 places, 4972 transitions, 242580 flow [2022-01-19 14:12:47,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:12:47,538 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:12:47,538 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, 1, 1, 1, 1, 1] [2022-01-19 14:12:47,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-01-19 14:12:47,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-19 14:12:47,739 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:12:47,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:12:47,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1469046577, now seen corresponding path program 28 times [2022-01-19 14:12:47,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:12:47,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254790143] [2022-01-19 14:12:47,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:12:47,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:12:47,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:12:47,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:12:47,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:12:47,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254790143] [2022-01-19 14:12:47,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254790143] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:12:47,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914619579] [2022-01-19 14:12:47,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 14:12:47,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:12:47,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:12:47,951 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:12:47,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-19 14:12:48,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 14:12:48,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:12:48,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-19 14:12:48,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:12:48,575 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:12:48,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:12:49,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:12:49,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914619579] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:12:49,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:12:49,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-01-19 14:12:49,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490366055] [2022-01-19 14:12:49,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:12:49,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-19 14:12:49,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:12:49,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-19 14:12:49,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1868, Unknown=0, NotChecked=0, Total=2070 [2022-01-19 14:12:49,189 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 14:12:49,190 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1965 places, 4972 transitions, 242580 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:12:49,190 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:12:49,190 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 14:12:49,190 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:13:22,327 INFO L129 PetriNetUnfolder]: 4671/13630 cut-off events. [2022-01-19 14:13:22,328 INFO L130 PetriNetUnfolder]: For 2186505/2186655 co-relation queries the response was YES. [2022-01-19 14:13:22,785 INFO L84 FinitePrefix]: Finished finitePrefix Result has 237628 conditions, 13630 events. 4671/13630 cut-off events. For 2186505/2186655 co-relation queries the response was YES. Maximal size of possible extension queue 855. Compared 154142 event pairs, 326 based on Foata normal form. 40/13596 useless extension candidates. Maximal degree in co-relation 237283. Up to 4114 conditions per place. [2022-01-19 14:13:22,907 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 1695 selfloop transitions, 3815 changer transitions 12/5592 dead transitions. [2022-01-19 14:13:22,907 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 2097 places, 5592 transitions, 283425 flow [2022-01-19 14:13:22,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-01-19 14:13:22,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2022-01-19 14:13:22,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 7661 transitions. [2022-01-19 14:13:22,910 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6192708754344839 [2022-01-19 14:13:22,910 INFO L72 ComplementDD]: Start complementDD. Operand 139 states and 7661 transitions. [2022-01-19 14:13:22,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 139 states and 7661 transitions. [2022-01-19 14:13:22,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:13:22,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 139 states and 7661 transitions. [2022-01-19 14:13:22,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 140 states, 139 states have (on average 55.115107913669064) internal successors, (7661), 139 states have internal predecessors, (7661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:13:22,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 140 states, 140 states have (on average 89.0) internal successors, (12460), 140 states have internal predecessors, (12460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:13:22,922 INFO L81 ComplementDD]: Finished complementDD. Result has 140 states, 140 states have (on average 89.0) internal successors, (12460), 140 states have internal predecessors, (12460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:13:22,923 INFO L186 Difference]: Start difference. First operand has 1965 places, 4972 transitions, 242580 flow. Second operand 139 states and 7661 transitions. [2022-01-19 14:13:22,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 2097 places, 5592 transitions, 283425 flow [2022-01-19 14:13:56,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 2074 places, 5592 transitions, 282059 flow, removed 382 selfloop flow, removed 23 redundant places. [2022-01-19 14:13:56,916 INFO L242 Difference]: Finished difference. Result has 2098 places, 5402 transitions, 277264 flow [2022-01-19 14:13:56,920 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=241523, PETRI_DIFFERENCE_MINUEND_PLACES=1936, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4972, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3404, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=139, PETRI_FLOW=277264, PETRI_PLACES=2098, PETRI_TRANSITIONS=5402} [2022-01-19 14:13:56,921 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 2019 predicate places. [2022-01-19 14:13:56,921 INFO L470 AbstractCegarLoop]: Abstraction has has 2098 places, 5402 transitions, 277264 flow [2022-01-19 14:13:56,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:13:56,921 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:13:56,921 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:13:56,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-19 14:13:57,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:13:57,135 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:13:57,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:13:57,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1215521967, now seen corresponding path program 7 times [2022-01-19 14:13:57,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:13:57,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267863024] [2022-01-19 14:13:57,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:13:57,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:13:57,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:13:57,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:13:57,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:13:57,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267863024] [2022-01-19 14:13:57,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267863024] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:13:57,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609403324] [2022-01-19 14:13:57,315 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 14:13:57,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:13:57,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:13:57,317 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:13:57,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-19 14:13:57,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:13:57,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-19 14:13:57,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:13:57,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:13:57,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:13:58,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:13:58,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609403324] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:13:58,180 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:13:58,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 38 [2022-01-19 14:13:58,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221449426] [2022-01-19 14:13:58,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:13:58,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-19 14:13:58,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:13:58,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-19 14:13:58,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1258, Unknown=0, NotChecked=0, Total=1406 [2022-01-19 14:13:58,182 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2022-01-19 14:13:58,182 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 2098 places, 5402 transitions, 277264 flow. Second operand has 38 states, 38 states have (on average 52.63157894736842) internal successors, (2000), 38 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:13:58,182 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:13:58,183 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2022-01-19 14:13:58,183 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:14:34,564 INFO L129 PetriNetUnfolder]: 4964/14181 cut-off events. [2022-01-19 14:14:34,565 INFO L130 PetriNetUnfolder]: For 2238735/2238757 co-relation queries the response was YES. [2022-01-19 14:14:35,048 INFO L84 FinitePrefix]: Finished finitePrefix Result has 247569 conditions, 14181 events. 4964/14181 cut-off events. For 2238735/2238757 co-relation queries the response was YES. Maximal size of possible extension queue 885. Compared 159739 event pairs, 763 based on Foata normal form. 14/14133 useless extension candidates. Maximal degree in co-relation 247208. Up to 7242 conditions per place. [2022-01-19 14:14:35,174 INFO L132 encePairwiseOnDemand]: 71/89 looper letters, 2296 selfloop transitions, 3213 changer transitions 12/5562 dead transitions. [2022-01-19 14:14:35,174 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 2159 places, 5562 transitions, 293350 flow [2022-01-19 14:14:35,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-19 14:14:35,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-01-19 14:14:35,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 3727 transitions. [2022-01-19 14:14:35,176 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6158294778585591 [2022-01-19 14:14:35,176 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 3727 transitions. [2022-01-19 14:14:35,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 3727 transitions. [2022-01-19 14:14:35,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:14:35,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 3727 transitions. [2022-01-19 14:14:35,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 54.80882352941177) internal successors, (3727), 68 states have internal predecessors, (3727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:14:35,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 89.0) internal successors, (6141), 69 states have internal predecessors, (6141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:14:35,181 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 89.0) internal successors, (6141), 69 states have internal predecessors, (6141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:14:35,181 INFO L186 Difference]: Start difference. First operand has 2098 places, 5402 transitions, 277264 flow. Second operand 68 states and 3727 transitions. [2022-01-19 14:14:35,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 2159 places, 5562 transitions, 293350 flow [2022-01-19 14:15:11,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 2095 places, 5562 transitions, 291719 flow, removed 143 selfloop flow, removed 64 redundant places. [2022-01-19 14:15:11,925 INFO L242 Difference]: Finished difference. Result has 2122 places, 5478 transitions, 289584 flow [2022-01-19 14:15:11,929 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=275652, PETRI_DIFFERENCE_MINUEND_PLACES=2028, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=289584, PETRI_PLACES=2122, PETRI_TRANSITIONS=5478} [2022-01-19 14:15:11,929 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 2043 predicate places. [2022-01-19 14:15:11,929 INFO L470 AbstractCegarLoop]: Abstraction has has 2122 places, 5478 transitions, 289584 flow [2022-01-19 14:15:11,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 52.63157894736842) internal successors, (2000), 38 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:15:11,929 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:15:11,930 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, 1, 1, 1, 1, 1] [2022-01-19 14:15:11,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-19 14:15:12,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-01-19 14:15:12,130 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:15:12,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:15:12,131 INFO L85 PathProgramCache]: Analyzing trace with hash -221004031, now seen corresponding path program 29 times [2022-01-19 14:15:12,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:15:12,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680445515] [2022-01-19 14:15:12,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:15:12,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:15:12,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:15:12,348 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:15:12,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:15:12,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680445515] [2022-01-19 14:15:12,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680445515] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:15:12,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173847698] [2022-01-19 14:15:12,349 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 14:15:12,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:15:12,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:15:12,350 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:15:12,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-19 14:15:12,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 14:15:12,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:15:12,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-19 14:15:12,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:15:12,999 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:15:12,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:15:13,609 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:15:13,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173847698] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:15:13,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:15:13,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-01-19 14:15:13,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290198002] [2022-01-19 14:15:13,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:15:13,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-19 14:15:13,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:15:13,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-19 14:15:13,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1868, Unknown=0, NotChecked=0, Total=2070 [2022-01-19 14:15:13,612 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 14:15:13,613 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 2122 places, 5478 transitions, 289584 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:15:13,613 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:15:13,613 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 14:15:13,613 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:15:50,574 INFO L129 PetriNetUnfolder]: 4712/13772 cut-off events. [2022-01-19 14:15:50,574 INFO L130 PetriNetUnfolder]: For 2428752/2428941 co-relation queries the response was YES. [2022-01-19 14:15:50,960 INFO L84 FinitePrefix]: Finished finitePrefix Result has 252397 conditions, 13772 events. 4712/13772 cut-off events. For 2428752/2428941 co-relation queries the response was YES. Maximal size of possible extension queue 859. Compared 156080 event pairs, 266 based on Foata normal form. 54/13779 useless extension candidates. Maximal degree in co-relation 252019. Up to 4154 conditions per place. [2022-01-19 14:15:51,085 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 1598 selfloop transitions, 4007 changer transitions 12/5694 dead transitions. [2022-01-19 14:15:51,085 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 2268 places, 5694 transitions, 307838 flow [2022-01-19 14:15:51,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-01-19 14:15:51,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2022-01-19 14:15:51,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 8432 transitions. [2022-01-19 14:15:51,089 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6192259675405742 [2022-01-19 14:15:51,089 INFO L72 ComplementDD]: Start complementDD. Operand 153 states and 8432 transitions. [2022-01-19 14:15:51,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 153 states and 8432 transitions. [2022-01-19 14:15:51,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:15:51,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 153 states and 8432 transitions. [2022-01-19 14:15:51,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 154 states, 153 states have (on average 55.111111111111114) internal successors, (8432), 153 states have internal predecessors, (8432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:15:51,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 154 states, 154 states have (on average 89.0) internal successors, (13706), 154 states have internal predecessors, (13706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:15:51,102 INFO L81 ComplementDD]: Finished complementDD. Result has 154 states, 154 states have (on average 89.0) internal successors, (13706), 154 states have internal predecessors, (13706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:15:51,102 INFO L186 Difference]: Start difference. First operand has 2122 places, 5478 transitions, 289584 flow. Second operand 153 states and 8432 transitions. [2022-01-19 14:15:51,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 2268 places, 5694 transitions, 307838 flow [2022-01-19 14:16:32,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 2236 places, 5694 transitions, 306373 flow, removed 293 selfloop flow, removed 32 redundant places. [2022-01-19 14:16:32,392 INFO L242 Difference]: Finished difference. Result has 2246 places, 5504 transitions, 299383 flow [2022-01-19 14:16:32,395 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=288182, PETRI_DIFFERENCE_MINUEND_PLACES=2084, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3981, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=153, PETRI_FLOW=299383, PETRI_PLACES=2246, PETRI_TRANSITIONS=5504} [2022-01-19 14:16:32,396 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 2167 predicate places. [2022-01-19 14:16:32,396 INFO L470 AbstractCegarLoop]: Abstraction has has 2246 places, 5504 transitions, 299383 flow [2022-01-19 14:16:32,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:16:32,396 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:16:32,396 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, 1, 1, 1, 1, 1] [2022-01-19 14:16:32,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-01-19 14:16:32,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:16:32,597 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:16:32,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:16:32,597 INFO L85 PathProgramCache]: Analyzing trace with hash -2076723501, now seen corresponding path program 30 times [2022-01-19 14:16:32,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:16:32,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96465453] [2022-01-19 14:16:32,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:16:32,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:16:32,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:16:32,799 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:16:32,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:16:32,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96465453] [2022-01-19 14:16:32,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96465453] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:16:32,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615841903] [2022-01-19 14:16:32,799 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 14:16:32,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:16:32,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:16:32,800 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:16:32,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-19 14:16:32,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 14:16:32,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:16:32,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-19 14:16:32,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:16:33,420 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:16:33,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:16:34,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:16:34,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615841903] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:16:34,067 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:16:34,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-01-19 14:16:34,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561642024] [2022-01-19 14:16:34,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:16:34,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-19 14:16:34,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:16:34,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-19 14:16:34,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1873, Unknown=0, NotChecked=0, Total=2070 [2022-01-19 14:16:34,069 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 14:16:34,069 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 2246 places, 5504 transitions, 299383 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:16:34,069 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:16:34,069 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 14:16:34,070 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:17:16,692 INFO L129 PetriNetUnfolder]: 5182/15091 cut-off events. [2022-01-19 14:17:16,693 INFO L130 PetriNetUnfolder]: For 2752184/2752351 co-relation queries the response was YES. [2022-01-19 14:17:17,229 INFO L84 FinitePrefix]: Finished finitePrefix Result has 282352 conditions, 15091 events. 5182/15091 cut-off events. For 2752184/2752351 co-relation queries the response was YES. Maximal size of possible extension queue 948. Compared 173670 event pairs, 251 based on Foata normal form. 56/15109 useless extension candidates. Maximal degree in co-relation 281970. Up to 3077 conditions per place. [2022-01-19 14:17:17,372 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 1318 selfloop transitions, 4927 changer transitions 13/6335 dead transitions. [2022-01-19 14:17:17,372 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 2421 places, 6335 transitions, 348845 flow [2022-01-19 14:17:17,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2022-01-19 14:17:17,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2022-01-19 14:17:17,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 10105 transitions. [2022-01-19 14:17:17,377 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6238424496851463 [2022-01-19 14:17:17,377 INFO L72 ComplementDD]: Start complementDD. Operand 182 states and 10105 transitions. [2022-01-19 14:17:17,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 182 states and 10105 transitions. [2022-01-19 14:17:17,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:17:17,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 182 states and 10105 transitions. [2022-01-19 14:17:17,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 183 states, 182 states have (on average 55.52197802197802) internal successors, (10105), 182 states have internal predecessors, (10105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:17:17,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 183 states, 183 states have (on average 89.0) internal successors, (16287), 183 states have internal predecessors, (16287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:17:17,392 INFO L81 ComplementDD]: Finished complementDD. Result has 183 states, 183 states have (on average 89.0) internal successors, (16287), 183 states have internal predecessors, (16287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:17:17,392 INFO L186 Difference]: Start difference. First operand has 2246 places, 5504 transitions, 299383 flow. Second operand 182 states and 10105 transitions. [2022-01-19 14:17:17,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 2421 places, 6335 transitions, 348845 flow [2022-01-19 14:18:03,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 2324 places, 6335 transitions, 345241 flow, removed 158 selfloop flow, removed 97 redundant places. [2022-01-19 14:18:03,859 INFO L242 Difference]: Finished difference. Result has 2354 places, 6060 transitions, 339895 flow [2022-01-19 14:18:03,862 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=296097, PETRI_DIFFERENCE_MINUEND_PLACES=2143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4385, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1008, PETRI_DIFFERENCE_SUBTRAHEND_STATES=182, PETRI_FLOW=339895, PETRI_PLACES=2354, PETRI_TRANSITIONS=6060} [2022-01-19 14:18:03,862 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 2275 predicate places. [2022-01-19 14:18:03,862 INFO L470 AbstractCegarLoop]: Abstraction has has 2354 places, 6060 transitions, 339895 flow [2022-01-19 14:18:03,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:18:03,863 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:18:03,863 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, 1, 1, 1, 1, 1] [2022-01-19 14:18:03,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-01-19 14:18:04,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:18:04,064 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:18:04,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:18:04,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1393669951, now seen corresponding path program 31 times [2022-01-19 14:18:04,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:18:04,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030008666] [2022-01-19 14:18:04,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:18:04,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:18:04,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:18:04,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:18:04,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:18:04,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030008666] [2022-01-19 14:18:04,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030008666] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:18:04,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338524229] [2022-01-19 14:18:04,288 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 14:18:04,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:18:04,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:18:04,289 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:18:04,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-19 14:18:04,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:18:04,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-19 14:18:04,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:18:04,927 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:18:04,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:18:05,600 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:18:05,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338524229] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:18:05,600 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:18:05,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-01-19 14:18:05,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907250449] [2022-01-19 14:18:05,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:18:05,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-19 14:18:05,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:18:05,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-19 14:18:05,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1866, Unknown=0, NotChecked=0, Total=2070 [2022-01-19 14:18:05,602 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-01-19 14:18:05,603 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 2354 places, 6060 transitions, 339895 flow. Second operand has 46 states, 46 states have (on average 53.630434782608695) internal successors, (2467), 46 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:18:05,603 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:18:05,603 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-01-19 14:18:05,603 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2022-01-19 14:18:23,008 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 14:18:23,008 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 14:18:23,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-01-19 14:18:23,066 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-01-19 14:18:23,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-01-19 14:18:23,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-01-19 14:18:23,267 WARN L594 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (46states, 52/89 universal loopers) in iteration 45,while PetriNetUnfolder was constructing finite prefix that currently has 40505 conditions, 1994 events (615/1993 cut-off events. For 275410/275423 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 21580 event pairs, 8 based on Foata normal form. 10/2593 useless extension candidates. Maximal degree in co-relation 40100. Up to 315 conditions per place.). [2022-01-19 14:18:23,268 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-19 14:18:23,268 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-19 14:18:23,271 INFO L732 BasicCegarLoop]: Path program histogram: [31, 7, 6, 1] [2022-01-19 14:18:23,272 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-19 14:18:23,272 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-19 14:18:23,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.01 02:18:23 BasicIcfg [2022-01-19 14:18:23,274 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-19 14:18:23,274 INFO L158 Benchmark]: Toolchain (without parser) took 810332.74ms. Allocated memory was 434.1MB in the beginning and 6.2GB in the end (delta: 5.8GB). Free memory was 381.0MB in the beginning and 3.2GB in the end (delta: -2.8GB). Peak memory consumption was 3.0GB. Max. memory is 16.0GB. [2022-01-19 14:18:23,274 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 434.1MB. Free memory was 397.6MB in the beginning and 397.5MB in the end (delta: 73.3kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 14:18:23,274 INFO L158 Benchmark]: CACSL2BoogieTranslator took 241.20ms. Allocated memory is still 434.1MB. Free memory was 380.8MB in the beginning and 405.7MB in the end (delta: -24.9MB). Peak memory consumption was 13.3MB. Max. memory is 16.0GB. [2022-01-19 14:18:23,274 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.03ms. Allocated memory is still 434.1MB. Free memory was 405.7MB in the beginning and 403.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 14:18:23,275 INFO L158 Benchmark]: Boogie Preprocessor took 26.03ms. Allocated memory is still 434.1MB. Free memory was 403.6MB in the beginning and 402.6MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 14:18:23,275 INFO L158 Benchmark]: RCFGBuilder took 318.75ms. Allocated memory is still 434.1MB. Free memory was 402.6MB in the beginning and 387.9MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2022-01-19 14:18:23,275 INFO L158 Benchmark]: TraceAbstraction took 809714.74ms. Allocated memory was 434.1MB in the beginning and 6.2GB in the end (delta: 5.8GB). Free memory was 387.9MB in the beginning and 3.2GB in the end (delta: -2.8GB). Peak memory consumption was 3.0GB. Max. memory is 16.0GB. [2022-01-19 14:18:23,276 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 434.1MB. Free memory was 397.6MB in the beginning and 397.5MB in the end (delta: 73.3kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 241.20ms. Allocated memory is still 434.1MB. Free memory was 380.8MB in the beginning and 405.7MB in the end (delta: -24.9MB). Peak memory consumption was 13.3MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 28.03ms. Allocated memory is still 434.1MB. Free memory was 405.7MB in the beginning and 403.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 26.03ms. Allocated memory is still 434.1MB. Free memory was 403.6MB in the beginning and 402.6MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 318.75ms. Allocated memory is still 434.1MB. Free memory was 402.6MB in the beginning and 387.9MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 809714.74ms. Allocated memory was 434.1MB in the beginning and 6.2GB in the end (delta: 5.8GB). Free memory was 387.9MB in the beginning and 3.2GB in the end (delta: -2.8GB). Peak memory consumption was 3.0GB. 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: 76]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (46states, 52/89 universal loopers) in iteration 45,while PetriNetUnfolder was constructing finite prefix that currently has 40505 conditions, 1994 events (615/1993 cut-off events. For 275410/275423 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 21580 event pairs, 8 based on Foata normal form. 10/2593 useless extension candidates. Maximal degree in co-relation 40100. Up to 315 conditions per place.). - TimeoutResultAtElement [Line: 70]: 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 (46states, 52/89 universal loopers) in iteration 45,while PetriNetUnfolder was constructing finite prefix that currently has 40505 conditions, 1994 events (615/1993 cut-off events. For 275410/275423 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 21580 event pairs, 8 based on Foata normal form. 10/2593 useless extension candidates. Maximal degree in co-relation 40100. Up to 315 conditions per place.). - TimeoutResultAtElement [Line: 71]: 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 (46states, 52/89 universal loopers) in iteration 45,while PetriNetUnfolder was constructing finite prefix that currently has 40505 conditions, 1994 events (615/1993 cut-off events. For 275410/275423 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 21580 event pairs, 8 based on Foata normal form. 10/2593 useless extension candidates. Maximal degree in co-relation 40100. Up to 315 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 104 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: 809.6s, OverallIterations: 45, TraceHistogramMax: 2, PathProgramHistogramMax: 31, EmptinessCheckTime: 0.0s, AutomataDifference: 751.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 19547 SdHoareTripleChecker+Valid, 26.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 19547 mSDsluCounter, 19439 SdHoareTripleChecker+Invalid, 22.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 26318 mSDsCounter, 5721 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 68777 IncrementalHoareTripleChecker+Invalid, 74498 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5721 mSolverCounterUnsat, 1510 mSDtfsCounter, 68777 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 9204 GetRequests, 4349 SyntacticMatches, 92 SemanticMatches, 4763 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261816 ImplicationChecksByTransitivity, 139.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=339895occurred in iteration=44, InterpolantAutomatonStates: 3572, 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: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 46.8s InterpolantComputationTime, 5726 NumberOfCodeBlocks, 5690 NumberOfCodeBlocksAsserted, 114 NumberOfCheckSat, 8251 ConstructedInterpolants, 0 QuantifiedInterpolants, 80996 SizeOfPredicates, 482 NumberOfNonLiveVariables, 5889 ConjunctsInSsa, 921 ConjunctsInUnsatCore, 121 InterpolantComputations, 7 PerfectInterpolantSequences, 0/369 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