/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-231806ee773fbd0554de777ff4074f5592c67ff4-231806e [2021-10-13 22:48:46,861 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 22:48:46,863 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 22:48:46,922 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 22:48:46,922 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 22:48:46,923 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 22:48:46,923 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 22:48:46,924 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 22:48:46,925 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 22:48:46,926 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 22:48:46,926 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 22:48:46,927 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 22:48:46,927 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 22:48:46,928 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 22:48:46,929 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 22:48:46,929 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 22:48:46,930 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 22:48:46,931 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 22:48:46,931 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 22:48:46,932 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 22:48:46,933 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 22:48:46,935 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 22:48:46,936 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 22:48:46,936 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 22:48:46,938 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-13 22:48:46,944 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 22:48:46,944 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 22:48:46,946 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 22:48:46,946 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 22:48:46,947 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 22:48:46,947 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 22:48:46,948 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 22:48:46,948 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 22:48:46,948 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 22:48:46,948 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 22:48:46,949 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 22:48:46,950 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2021-10-13 22:48:46,973 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 22:48:46,974 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 22:48:46,975 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 22:48:46,975 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 22:48:46,975 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 22:48:46,975 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 22:48:46,975 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 22:48:46,975 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 22:48:46,975 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 22:48:46,976 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 22:48:46,976 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 22:48:46,976 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 22:48:46,976 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 22:48:46,976 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 22:48:46,976 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 22:48:46,976 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 22:48:46,977 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 22:48:46,977 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 22:48:46,977 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 22:48:46,977 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-10-13 22:48:46,977 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 22:48:46,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 22:48:46,977 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 22:48:46,977 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 22:48:46,977 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 22:48:46,977 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 22:48:46,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 22:48:46,977 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-13 22:48:46,978 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-13 22:48:46,978 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-13 22:48:47,180 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 22:48:47,199 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 22:48:47,200 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 22:48:47,201 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 22:48:47,201 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 22:48:47,203 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-2.i [2021-10-13 22:48:47,253 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8e336611/f552197eedb34f70971f83e189f78e70/FLAG323a3fa80 [2021-10-13 22:48:47,617 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 22:48:47,617 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-2.i [2021-10-13 22:48:47,628 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8e336611/f552197eedb34f70971f83e189f78e70/FLAG323a3fa80 [2021-10-13 22:48:47,989 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8e336611/f552197eedb34f70971f83e189f78e70 [2021-10-13 22:48:47,991 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 22:48:47,993 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 22:48:48,000 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 22:48:48,000 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 22:48:48,003 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 22:48:48,004 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:48:47" (1/1) ... [2021-10-13 22:48:48,005 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37b37f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:48:48, skipping insertion in model container [2021-10-13 22:48:48,005 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:48:47" (1/1) ... [2021-10-13 22:48:48,011 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 22:48:48,044 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 22:48:48,235 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-2.i[30964,30977] [2021-10-13 22:48:48,237 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 22:48:48,241 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 22:48:48,264 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-2.i[30964,30977] [2021-10-13 22:48:48,264 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 22:48:48,288 INFO L208 MainTranslator]: Completed translation [2021-10-13 22:48:48,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:48:48 WrapperNode [2021-10-13 22:48:48,288 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 22:48:48,289 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 22:48:48,289 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 22:48:48,289 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 22:48:48,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:48:48" (1/1) ... [2021-10-13 22:48:48,308 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:48:48" (1/1) ... [2021-10-13 22:48:48,323 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 22:48:48,324 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 22:48:48,324 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 22:48:48,324 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 22:48:48,329 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:48:48" (1/1) ... [2021-10-13 22:48:48,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:48:48" (1/1) ... [2021-10-13 22:48:48,336 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:48:48" (1/1) ... [2021-10-13 22:48:48,336 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:48:48" (1/1) ... [2021-10-13 22:48:48,339 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:48:48" (1/1) ... [2021-10-13 22:48:48,342 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:48:48" (1/1) ... [2021-10-13 22:48:48,342 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:48:48" (1/1) ... [2021-10-13 22:48:48,344 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 22:48:48,344 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 22:48:48,344 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 22:48:48,344 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 22:48:48,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:48:48" (1/1) ... [2021-10-13 22:48:48,354 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 22:48:48,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:48,371 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) [2021-10-13 22:48:48,379 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 [2021-10-13 22:48:48,402 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-10-13 22:48:48,403 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-10-13 22:48:48,403 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-10-13 22:48:48,403 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-10-13 22:48:48,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 22:48:48,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-13 22:48:48,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 22:48:48,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 22:48:48,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 22:48:48,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-13 22:48:48,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 22:48:48,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 22:48:48,404 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-13 22:48:48,617 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 22:48:48,617 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-13 22:48:48,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:48:48 BoogieIcfgContainer [2021-10-13 22:48:48,619 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 22:48:48,621 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 22:48:48,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 22:48:48,624 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 22:48:48,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:48:47" (1/3) ... [2021-10-13 22:48:48,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25bd320d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:48:48, skipping insertion in model container [2021-10-13 22:48:48,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:48:48" (2/3) ... [2021-10-13 22:48:48,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25bd320d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:48:48, skipping insertion in model container [2021-10-13 22:48:48,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:48:48" (3/3) ... [2021-10-13 22:48:48,627 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-2.i [2021-10-13 22:48:48,630 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 22:48:48,630 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 22:48:48,631 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-13 22:48:48,656 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,656 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,656 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,657 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,657 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,657 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,657 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,657 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,657 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,658 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,659 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,659 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,659 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,659 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,659 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,659 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,659 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,659 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,660 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,660 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,660 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,660 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,660 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,660 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,661 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,661 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,661 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,661 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,661 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,661 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,661 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,662 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,662 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,662 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,662 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,662 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,663 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,663 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,663 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,663 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,663 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,663 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,663 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,664 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,664 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,664 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,664 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,664 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,664 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,664 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,664 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,664 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,667 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,667 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,668 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,669 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,672 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,672 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,673 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,673 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,673 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,673 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,679 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,679 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,680 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,680 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,680 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,680 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:48:48,682 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-10-13 22:48:48,719 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 22:48:48,726 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, mConcurrency=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 [2021-10-13 22:48:48,726 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-13 22:48:48,744 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 68 places, 66 transitions, 142 flow [2021-10-13 22:48:48,782 INFO L129 PetriNetUnfolder]: 5/64 cut-off events. [2021-10-13 22:48:48,782 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-13 22:48:48,786 INFO L84 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 5/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 65 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2021-10-13 22:48:48,786 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 66 transitions, 142 flow [2021-10-13 22:48:48,790 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 64 transitions, 134 flow [2021-10-13 22:48:48,804 INFO L129 PetriNetUnfolder]: 3/52 cut-off events. [2021-10-13 22:48:48,804 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-13 22:48:48,804 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:48,805 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] [2021-10-13 22:48:48,805 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:48,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:48,810 INFO L82 PathProgramCache]: Analyzing trace with hash 2112281486, now seen corresponding path program 1 times [2021-10-13 22:48:48,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:48,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372817060] [2021-10-13 22:48:48,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:48,816 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:49,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:49,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:49,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372817060] [2021-10-13 22:48:49,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372817060] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 22:48:49,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 22:48:49,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 22:48:49,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692732453] [2021-10-13 22:48:49,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 22:48:49,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:49,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 22:48:49,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-13 22:48:49,096 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:48:49,112 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 54.0) internal successors, (324), 6 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:49,112 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:49,112 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:48:49,113 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:49,223 INFO L129 PetriNetUnfolder]: 39/220 cut-off events. [2021-10-13 22:48:49,224 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-13 22:48:49,225 INFO L84 FinitePrefix]: Finished finitePrefix Result has 294 conditions, 220 events. 39/220 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 984 event pairs, 0 based on Foata normal form. 40/235 useless extension candidates. Maximal degree in co-relation 265. Up to 26 conditions per place. [2021-10-13 22:48:49,226 INFO L132 encePairwiseOnDemand]: 55/66 looper letters, 16 selfloop transitions, 9 changer transitions 5/81 dead transitions. [2021-10-13 22:48:49,226 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 81 transitions, 228 flow [2021-10-13 22:48:49,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 22:48:49,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-13 22:48:49,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 473 transitions. [2021-10-13 22:48:49,235 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8958333333333334 [2021-10-13 22:48:49,236 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 473 transitions. [2021-10-13 22:48:49,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 473 transitions. [2021-10-13 22:48:49,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:49,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 473 transitions. [2021-10-13 22:48:49,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 59.125) internal successors, (473), 8 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:49,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 66.0) internal successors, (594), 9 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:49,247 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 66.0) internal successors, (594), 9 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:49,248 INFO L186 Difference]: Start difference. First operand has 66 places, 64 transitions, 134 flow. Second operand 8 states and 473 transitions. [2021-10-13 22:48:49,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 81 transitions, 228 flow [2021-10-13 22:48:49,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 81 transitions, 226 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-13 22:48:49,257 INFO L242 Difference]: Finished difference. Result has 77 places, 67 transitions, 198 flow [2021-10-13 22:48:49,259 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=198, PETRI_PLACES=77, PETRI_TRANSITIONS=67} [2021-10-13 22:48:49,259 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 11 predicate places. [2021-10-13 22:48:49,259 INFO L470 AbstractCegarLoop]: Abstraction has has 77 places, 67 transitions, 198 flow [2021-10-13 22:48:49,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.0) internal successors, (324), 6 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:49,260 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:49,260 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] [2021-10-13 22:48:49,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 22:48:49,260 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:49,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:49,262 INFO L82 PathProgramCache]: Analyzing trace with hash 263941995, now seen corresponding path program 1 times [2021-10-13 22:48:49,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:49,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560717991] [2021-10-13 22:48:49,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:49,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:49,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:49,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:49,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:49,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560717991] [2021-10-13 22:48:49,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560717991] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 22:48:49,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 22:48:49,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 22:48:49,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806219452] [2021-10-13 22:48:49,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 22:48:49,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:49,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 22:48:49,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-13 22:48:49,414 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:48:49,415 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 67 transitions, 198 flow. Second operand has 6 states, 6 states have (on average 54.166666666666664) internal successors, (325), 6 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:49,415 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:49,415 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:48:49,415 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:49,548 INFO L129 PetriNetUnfolder]: 55/271 cut-off events. [2021-10-13 22:48:49,549 INFO L130 PetriNetUnfolder]: For 298/325 co-relation queries the response was YES. [2021-10-13 22:48:49,550 INFO L84 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 271 events. 55/271 cut-off events. For 298/325 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1215 event pairs, 0 based on Foata normal form. 9/259 useless extension candidates. Maximal degree in co-relation 540. Up to 42 conditions per place. [2021-10-13 22:48:49,551 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 19 selfloop transitions, 11 changer transitions 30/104 dead transitions. [2021-10-13 22:48:49,551 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 104 transitions, 540 flow [2021-10-13 22:48:49,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 22:48:49,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-13 22:48:49,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 568 transitions. [2021-10-13 22:48:49,554 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8606060606060606 [2021-10-13 22:48:49,554 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 568 transitions. [2021-10-13 22:48:49,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 568 transitions. [2021-10-13 22:48:49,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:49,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 568 transitions. [2021-10-13 22:48:49,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 56.8) internal successors, (568), 10 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:49,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 66.0) internal successors, (726), 11 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:49,557 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 66.0) internal successors, (726), 11 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:49,557 INFO L186 Difference]: Start difference. First operand has 77 places, 67 transitions, 198 flow. Second operand 10 states and 568 transitions. [2021-10-13 22:48:49,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 104 transitions, 540 flow [2021-10-13 22:48:49,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 104 transitions, 526 flow, removed 4 selfloop flow, removed 2 redundant places. [2021-10-13 22:48:49,564 INFO L242 Difference]: Finished difference. Result has 91 places, 66 transitions, 285 flow [2021-10-13 22:48:49,565 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=285, PETRI_PLACES=91, PETRI_TRANSITIONS=66} [2021-10-13 22:48:49,565 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 25 predicate places. [2021-10-13 22:48:49,565 INFO L470 AbstractCegarLoop]: Abstraction has has 91 places, 66 transitions, 285 flow [2021-10-13 22:48:49,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.166666666666664) internal successors, (325), 6 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:49,565 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:49,566 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] [2021-10-13 22:48:49,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 22:48:49,566 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:49,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:49,566 INFO L82 PathProgramCache]: Analyzing trace with hash 2041180881, now seen corresponding path program 2 times [2021-10-13 22:48:49,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:49,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866113179] [2021-10-13 22:48:49,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:49,567 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:49,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:49,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:49,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:49,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866113179] [2021-10-13 22:48:49,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866113179] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 22:48:49,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 22:48:49,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 22:48:49,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430595001] [2021-10-13 22:48:49,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 22:48:49,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:49,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 22:48:49,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-13 22:48:49,637 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:48:49,637 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 66 transitions, 285 flow. Second operand has 6 states, 6 states have (on average 54.166666666666664) internal successors, (325), 6 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:49,637 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:49,637 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:48:49,637 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:49,760 INFO L129 PetriNetUnfolder]: 35/183 cut-off events. [2021-10-13 22:48:49,761 INFO L130 PetriNetUnfolder]: For 839/896 co-relation queries the response was YES. [2021-10-13 22:48:49,762 INFO L84 FinitePrefix]: Finished finitePrefix Result has 527 conditions, 183 events. 35/183 cut-off events. For 839/896 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 610 event pairs, 0 based on Foata normal form. 27/193 useless extension candidates. Maximal degree in co-relation 481. Up to 35 conditions per place. [2021-10-13 22:48:49,763 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 16 selfloop transitions, 12 changer transitions 11/83 dead transitions. [2021-10-13 22:48:49,763 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 83 transitions, 565 flow [2021-10-13 22:48:49,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 22:48:49,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-13 22:48:49,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 503 transitions. [2021-10-13 22:48:49,764 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8468013468013468 [2021-10-13 22:48:49,764 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 503 transitions. [2021-10-13 22:48:49,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 503 transitions. [2021-10-13 22:48:49,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:49,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 503 transitions. [2021-10-13 22:48:49,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 55.888888888888886) internal successors, (503), 9 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:49,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:49,767 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:49,767 INFO L186 Difference]: Start difference. First operand has 91 places, 66 transitions, 285 flow. Second operand 9 states and 503 transitions. [2021-10-13 22:48:49,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 83 transitions, 565 flow [2021-10-13 22:48:49,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 83 transitions, 492 flow, removed 33 selfloop flow, removed 5 redundant places. [2021-10-13 22:48:49,771 INFO L242 Difference]: Finished difference. Result has 85 places, 68 transitions, 325 flow [2021-10-13 22:48:49,771 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=325, PETRI_PLACES=85, PETRI_TRANSITIONS=68} [2021-10-13 22:48:49,771 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 19 predicate places. [2021-10-13 22:48:49,771 INFO L470 AbstractCegarLoop]: Abstraction has has 85 places, 68 transitions, 325 flow [2021-10-13 22:48:49,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.166666666666664) internal successors, (325), 6 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:49,772 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:49,772 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] [2021-10-13 22:48:49,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 22:48:49,772 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:49,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:49,772 INFO L82 PathProgramCache]: Analyzing trace with hash 418425126, now seen corresponding path program 1 times [2021-10-13 22:48:49,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:49,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953459406] [2021-10-13 22:48:49,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:49,791 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:49,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:49,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:49,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:49,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953459406] [2021-10-13 22:48:49,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953459406] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 22:48:49,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 22:48:49,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-13 22:48:49,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113197762] [2021-10-13 22:48:49,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 22:48:49,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:49,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 22:48:49,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-13 22:48:49,887 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:48:49,887 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 68 transitions, 325 flow. Second operand has 7 states, 7 states have (on average 54.142857142857146) internal successors, (379), 7 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:49,887 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:49,887 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:48:49,887 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:49,984 INFO L129 PetriNetUnfolder]: 41/221 cut-off events. [2021-10-13 22:48:49,984 INFO L130 PetriNetUnfolder]: For 911/960 co-relation queries the response was YES. [2021-10-13 22:48:49,986 INFO L84 FinitePrefix]: Finished finitePrefix Result has 634 conditions, 221 events. 41/221 cut-off events. For 911/960 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 777 event pairs, 0 based on Foata normal form. 18/218 useless extension candidates. Maximal degree in co-relation 585. Up to 41 conditions per place. [2021-10-13 22:48:49,988 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 18 selfloop transitions, 20 changer transitions 8/90 dead transitions. [2021-10-13 22:48:49,989 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 90 transitions, 675 flow [2021-10-13 22:48:49,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 22:48:49,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-13 22:48:49,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 620 transitions. [2021-10-13 22:48:49,991 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8539944903581267 [2021-10-13 22:48:49,991 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 620 transitions. [2021-10-13 22:48:49,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 620 transitions. [2021-10-13 22:48:49,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:49,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 620 transitions. [2021-10-13 22:48:49,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 56.36363636363637) internal successors, (620), 11 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:49,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 66.0) internal successors, (792), 12 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:49,994 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 66.0) internal successors, (792), 12 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:49,995 INFO L186 Difference]: Start difference. First operand has 85 places, 68 transitions, 325 flow. Second operand 11 states and 620 transitions. [2021-10-13 22:48:49,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 90 transitions, 675 flow [2021-10-13 22:48:50,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 90 transitions, 578 flow, removed 38 selfloop flow, removed 8 redundant places. [2021-10-13 22:48:50,003 INFO L242 Difference]: Finished difference. Result has 91 places, 73 transitions, 410 flow [2021-10-13 22:48:50,003 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=410, PETRI_PLACES=91, PETRI_TRANSITIONS=73} [2021-10-13 22:48:50,004 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 25 predicate places. [2021-10-13 22:48:50,004 INFO L470 AbstractCegarLoop]: Abstraction has has 91 places, 73 transitions, 410 flow [2021-10-13 22:48:50,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 54.142857142857146) internal successors, (379), 7 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:50,004 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:50,004 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] [2021-10-13 22:48:50,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 22:48:50,004 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:50,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:50,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1863597102, now seen corresponding path program 2 times [2021-10-13 22:48:50,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:50,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889680312] [2021-10-13 22:48:50,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:50,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:50,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:50,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:50,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889680312] [2021-10-13 22:48:50,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889680312] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 22:48:50,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 22:48:50,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-13 22:48:50,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26309237] [2021-10-13 22:48:50,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 22:48:50,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:50,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 22:48:50,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-13 22:48:50,107 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:48:50,107 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 73 transitions, 410 flow. Second operand has 7 states, 7 states have (on average 54.142857142857146) internal successors, (379), 7 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:50,107 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:50,107 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:48:50,107 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:50,226 INFO L129 PetriNetUnfolder]: 36/206 cut-off events. [2021-10-13 22:48:50,226 INFO L130 PetriNetUnfolder]: For 1026/1089 co-relation queries the response was YES. [2021-10-13 22:48:50,227 INFO L84 FinitePrefix]: Finished finitePrefix Result has 618 conditions, 206 events. 36/206 cut-off events. For 1026/1089 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 748 event pairs, 0 based on Foata normal form. 26/212 useless extension candidates. Maximal degree in co-relation 573. Up to 40 conditions per place. [2021-10-13 22:48:50,228 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 16 selfloop transitions, 22 changer transitions 11/93 dead transitions. [2021-10-13 22:48:50,228 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 93 transitions, 776 flow [2021-10-13 22:48:50,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 22:48:50,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-13 22:48:50,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 670 transitions. [2021-10-13 22:48:50,230 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8459595959595959 [2021-10-13 22:48:50,230 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 670 transitions. [2021-10-13 22:48:50,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 670 transitions. [2021-10-13 22:48:50,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:50,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 670 transitions. [2021-10-13 22:48:50,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 55.833333333333336) internal successors, (670), 12 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:50,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 66.0) internal successors, (858), 13 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:50,233 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 66.0) internal successors, (858), 13 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:50,233 INFO L186 Difference]: Start difference. First operand has 91 places, 73 transitions, 410 flow. Second operand 12 states and 670 transitions. [2021-10-13 22:48:50,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 93 transitions, 776 flow [2021-10-13 22:48:50,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 93 transitions, 702 flow, removed 21 selfloop flow, removed 7 redundant places. [2021-10-13 22:48:50,238 INFO L242 Difference]: Finished difference. Result has 98 places, 76 transitions, 488 flow [2021-10-13 22:48:50,238 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=488, PETRI_PLACES=98, PETRI_TRANSITIONS=76} [2021-10-13 22:48:50,238 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 32 predicate places. [2021-10-13 22:48:50,238 INFO L470 AbstractCegarLoop]: Abstraction has has 98 places, 76 transitions, 488 flow [2021-10-13 22:48:50,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 54.142857142857146) internal successors, (379), 7 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:50,239 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:50,239 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-10-13 22:48:50,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 22:48:50,239 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:50,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:50,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1644889195, now seen corresponding path program 1 times [2021-10-13 22:48:50,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:50,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331511791] [2021-10-13 22:48:50,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:50,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:50,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:50,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:50,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:50,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331511791] [2021-10-13 22:48:50,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331511791] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:50,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089596487] [2021-10-13 22:48:50,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:50,335 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:50,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:50,336 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) [2021-10-13 22:48:50,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 22:48:50,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:50,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 22:48:50,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:48:50,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:50,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089596487] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:50,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:48:50,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-10-13 22:48:50,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651324537] [2021-10-13 22:48:50,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 22:48:50,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:50,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 22:48:50,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-13 22:48:50,609 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:48:50,610 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 76 transitions, 488 flow. Second operand has 9 states, 9 states have (on average 54.22222222222222) internal successors, (488), 9 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:50,610 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:50,610 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:48:50,610 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:50,684 INFO L129 PetriNetUnfolder]: 36/206 cut-off events. [2021-10-13 22:48:50,684 INFO L130 PetriNetUnfolder]: For 1306/1371 co-relation queries the response was YES. [2021-10-13 22:48:50,685 INFO L84 FinitePrefix]: Finished finitePrefix Result has 667 conditions, 206 events. 36/206 cut-off events. For 1306/1371 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 714 event pairs, 0 based on Foata normal form. 31/217 useless extension candidates. Maximal degree in co-relation 617. Up to 42 conditions per place. [2021-10-13 22:48:50,686 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 27 selfloop transitions, 13 changer transitions 8/92 dead transitions. [2021-10-13 22:48:50,686 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 92 transitions, 839 flow [2021-10-13 22:48:50,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 22:48:50,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-13 22:48:50,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 615 transitions. [2021-10-13 22:48:50,688 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8471074380165289 [2021-10-13 22:48:50,688 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 615 transitions. [2021-10-13 22:48:50,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 615 transitions. [2021-10-13 22:48:50,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:50,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 615 transitions. [2021-10-13 22:48:50,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 55.90909090909091) internal successors, (615), 11 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:50,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 66.0) internal successors, (792), 12 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:50,691 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 66.0) internal successors, (792), 12 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:50,691 INFO L186 Difference]: Start difference. First operand has 98 places, 76 transitions, 488 flow. Second operand 11 states and 615 transitions. [2021-10-13 22:48:50,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 92 transitions, 839 flow [2021-10-13 22:48:50,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 92 transitions, 737 flow, removed 30 selfloop flow, removed 10 redundant places. [2021-10-13 22:48:50,698 INFO L242 Difference]: Finished difference. Result has 100 places, 78 transitions, 484 flow [2021-10-13 22:48:50,698 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=484, PETRI_PLACES=100, PETRI_TRANSITIONS=78} [2021-10-13 22:48:50,699 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 34 predicate places. [2021-10-13 22:48:50,699 INFO L470 AbstractCegarLoop]: Abstraction has has 100 places, 78 transitions, 484 flow [2021-10-13 22:48:50,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 54.22222222222222) internal successors, (488), 9 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:50,699 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:50,699 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-10-13 22:48:50,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-13 22:48:50,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-13 22:48:50,915 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:50,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:50,915 INFO L82 PathProgramCache]: Analyzing trace with hash 290887513, now seen corresponding path program 2 times [2021-10-13 22:48:50,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:50,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833100726] [2021-10-13 22:48:50,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:50,916 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:50,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:51,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:51,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:51,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833100726] [2021-10-13 22:48:51,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833100726] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:51,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023714755] [2021-10-13 22:48:51,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:48:51,042 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:51,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:51,043 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) [2021-10-13 22:48:51,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 22:48:51,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:48:51,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:48:51,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 22:48:51,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:48:51,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:51,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023714755] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:51,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:48:51,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-10-13 22:48:51,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918744068] [2021-10-13 22:48:51,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 22:48:51,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:51,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 22:48:51,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-13 22:48:51,321 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:48:51,321 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 78 transitions, 484 flow. Second operand has 10 states, 10 states have (on average 54.3) internal successors, (543), 10 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:51,321 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:51,321 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:48:51,321 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:51,442 INFO L129 PetriNetUnfolder]: 42/245 cut-off events. [2021-10-13 22:48:51,442 INFO L130 PetriNetUnfolder]: For 1722/1795 co-relation queries the response was YES. [2021-10-13 22:48:51,443 INFO L84 FinitePrefix]: Finished finitePrefix Result has 809 conditions, 245 events. 42/245 cut-off events. For 1722/1795 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 971 event pairs, 0 based on Foata normal form. 31/252 useless extension candidates. Maximal degree in co-relation 755. Up to 52 conditions per place. [2021-10-13 22:48:51,444 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 27 selfloop transitions, 21 changer transitions 8/100 dead transitions. [2021-10-13 22:48:51,444 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 100 transitions, 953 flow [2021-10-13 22:48:51,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 22:48:51,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-13 22:48:51,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 782 transitions. [2021-10-13 22:48:51,446 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8463203463203464 [2021-10-13 22:48:51,446 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 782 transitions. [2021-10-13 22:48:51,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 782 transitions. [2021-10-13 22:48:51,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:51,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 782 transitions. [2021-10-13 22:48:51,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 55.857142857142854) internal successors, (782), 14 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:51,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 66.0) internal successors, (990), 15 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:51,449 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 66.0) internal successors, (990), 15 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:51,449 INFO L186 Difference]: Start difference. First operand has 100 places, 78 transitions, 484 flow. Second operand 14 states and 782 transitions. [2021-10-13 22:48:51,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 100 transitions, 953 flow [2021-10-13 22:48:51,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 100 transitions, 847 flow, removed 42 selfloop flow, removed 8 redundant places. [2021-10-13 22:48:51,454 INFO L242 Difference]: Finished difference. Result has 110 places, 86 transitions, 600 flow [2021-10-13 22:48:51,454 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=600, PETRI_PLACES=110, PETRI_TRANSITIONS=86} [2021-10-13 22:48:51,454 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 44 predicate places. [2021-10-13 22:48:51,454 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 86 transitions, 600 flow [2021-10-13 22:48:51,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 54.3) internal successors, (543), 10 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:51,455 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:51,455 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-10-13 22:48:51,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 22:48:51,671 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,SelfDestructingSolverStorable6 [2021-10-13 22:48:51,671 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:51,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:51,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1190358857, now seen corresponding path program 3 times [2021-10-13 22:48:51,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:51,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153371614] [2021-10-13 22:48:51,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:51,672 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:51,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:51,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:51,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:51,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153371614] [2021-10-13 22:48:51,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153371614] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:51,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104564832] [2021-10-13 22:48:51,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:48:51,722 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:51,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:51,723 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) [2021-10-13 22:48:51,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 22:48:51,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 22:48:51,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:48:51,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 22:48:51,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:48:51,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:51,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104564832] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:51,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:48:51,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-10-13 22:48:51,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486835963] [2021-10-13 22:48:51,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 22:48:51,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:51,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 22:48:51,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-13 22:48:51,955 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:48:51,955 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 86 transitions, 600 flow. Second operand has 9 states, 9 states have (on average 54.22222222222222) internal successors, (488), 9 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:51,955 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:51,956 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:48:51,956 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:52,100 INFO L129 PetriNetUnfolder]: 57/327 cut-off events. [2021-10-13 22:48:52,101 INFO L130 PetriNetUnfolder]: For 3026/3131 co-relation queries the response was YES. [2021-10-13 22:48:52,102 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1190 conditions, 327 events. 57/327 cut-off events. For 3026/3131 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1519 event pairs, 0 based on Foata normal form. 39/333 useless extension candidates. Maximal degree in co-relation 1130. Up to 72 conditions per place. [2021-10-13 22:48:52,104 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 33 selfloop transitions, 26 changer transitions 8/111 dead transitions. [2021-10-13 22:48:52,104 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 111 transitions, 1218 flow [2021-10-13 22:48:52,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 22:48:52,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-13 22:48:52,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 842 transitions. [2021-10-13 22:48:52,106 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8505050505050505 [2021-10-13 22:48:52,106 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 842 transitions. [2021-10-13 22:48:52,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 842 transitions. [2021-10-13 22:48:52,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:52,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 842 transitions. [2021-10-13 22:48:52,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 56.13333333333333) internal successors, (842), 15 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:52,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 66.0) internal successors, (1056), 16 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:52,109 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 66.0) internal successors, (1056), 16 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:52,109 INFO L186 Difference]: Start difference. First operand has 110 places, 86 transitions, 600 flow. Second operand 15 states and 842 transitions. [2021-10-13 22:48:52,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 111 transitions, 1218 flow [2021-10-13 22:48:52,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 111 transitions, 1088 flow, removed 65 selfloop flow, removed 3 redundant places. [2021-10-13 22:48:52,117 INFO L242 Difference]: Finished difference. Result has 125 places, 92 transitions, 744 flow [2021-10-13 22:48:52,117 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=744, PETRI_PLACES=125, PETRI_TRANSITIONS=92} [2021-10-13 22:48:52,117 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 59 predicate places. [2021-10-13 22:48:52,117 INFO L470 AbstractCegarLoop]: Abstraction has has 125 places, 92 transitions, 744 flow [2021-10-13 22:48:52,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 54.22222222222222) internal successors, (488), 9 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:52,118 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:52,118 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-10-13 22:48:52,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 22:48:52,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:52,336 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:52,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:52,337 INFO L82 PathProgramCache]: Analyzing trace with hash 831099873, now seen corresponding path program 4 times [2021-10-13 22:48:52,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:52,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291767845] [2021-10-13 22:48:52,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:52,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:52,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:52,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:52,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:52,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291767845] [2021-10-13 22:48:52,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291767845] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:52,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785525657] [2021-10-13 22:48:52,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:48:52,387 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:52,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:52,387 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) [2021-10-13 22:48:52,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 22:48:52,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:48:52,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:48:52,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 22:48:52,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:48:52,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:52,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785525657] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:52,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:48:52,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-10-13 22:48:52,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960832592] [2021-10-13 22:48:52,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 22:48:52,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:52,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 22:48:52,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-13 22:48:52,605 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:48:52,606 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 92 transitions, 744 flow. Second operand has 10 states, 10 states have (on average 54.2) internal successors, (542), 10 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:52,606 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:52,606 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:48:52,606 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:52,804 INFO L129 PetriNetUnfolder]: 58/343 cut-off events. [2021-10-13 22:48:52,804 INFO L130 PetriNetUnfolder]: For 4203/4304 co-relation queries the response was YES. [2021-10-13 22:48:52,805 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1368 conditions, 343 events. 58/343 cut-off events. For 4203/4304 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1639 event pairs, 0 based on Foata normal form. 46/355 useless extension candidates. Maximal degree in co-relation 1302. Up to 74 conditions per place. [2021-10-13 22:48:52,807 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 29 selfloop transitions, 34 changer transitions 17/124 dead transitions. [2021-10-13 22:48:52,807 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 124 transitions, 1668 flow [2021-10-13 22:48:52,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 22:48:52,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-13 22:48:52,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1116 transitions. [2021-10-13 22:48:52,809 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8454545454545455 [2021-10-13 22:48:52,809 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1116 transitions. [2021-10-13 22:48:52,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1116 transitions. [2021-10-13 22:48:52,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:52,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1116 transitions. [2021-10-13 22:48:52,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 55.8) internal successors, (1116), 20 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:52,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 66.0) internal successors, (1386), 21 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:52,813 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 66.0) internal successors, (1386), 21 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:52,813 INFO L186 Difference]: Start difference. First operand has 125 places, 92 transitions, 744 flow. Second operand 20 states and 1116 transitions. [2021-10-13 22:48:52,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 124 transitions, 1668 flow [2021-10-13 22:48:52,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 124 transitions, 1438 flow, removed 98 selfloop flow, removed 10 redundant places. [2021-10-13 22:48:52,821 INFO L242 Difference]: Finished difference. Result has 141 places, 99 transitions, 920 flow [2021-10-13 22:48:52,821 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=636, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=920, PETRI_PLACES=141, PETRI_TRANSITIONS=99} [2021-10-13 22:48:52,821 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 75 predicate places. [2021-10-13 22:48:52,821 INFO L470 AbstractCegarLoop]: Abstraction has has 141 places, 99 transitions, 920 flow [2021-10-13 22:48:52,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 54.2) internal successors, (542), 10 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:52,822 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:52,822 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:48:52,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-13 22:48:53,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:53,041 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:53,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:53,042 INFO L82 PathProgramCache]: Analyzing trace with hash 672940227, now seen corresponding path program 1 times [2021-10-13 22:48:53,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:53,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593281199] [2021-10-13 22:48:53,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:53,042 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:53,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:53,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:53,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:53,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593281199] [2021-10-13 22:48:53,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593281199] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:53,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391205389] [2021-10-13 22:48:53,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:53,123 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:53,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:53,124 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) [2021-10-13 22:48:53,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 22:48:53,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:53,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 22:48:53,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:48:53,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:53,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391205389] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:53,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:48:53,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-10-13 22:48:53,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187672513] [2021-10-13 22:48:53,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 22:48:53,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:53,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 22:48:53,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-13 22:48:53,376 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:48:53,376 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 99 transitions, 920 flow. Second operand has 9 states, 9 states have (on average 54.111111111111114) internal successors, (487), 9 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:53,376 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:53,376 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:48:53,376 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:53,498 INFO L129 PetriNetUnfolder]: 54/330 cut-off events. [2021-10-13 22:48:53,498 INFO L130 PetriNetUnfolder]: For 5857/5979 co-relation queries the response was YES. [2021-10-13 22:48:53,500 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1428 conditions, 330 events. 54/330 cut-off events. For 5857/5979 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1534 event pairs, 0 based on Foata normal form. 33/330 useless extension candidates. Maximal degree in co-relation 1354. Up to 68 conditions per place. [2021-10-13 22:48:53,502 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 39 selfloop transitions, 25 changer transitions 8/116 dead transitions. [2021-10-13 22:48:53,502 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 116 transitions, 1594 flow [2021-10-13 22:48:53,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 22:48:53,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-13 22:48:53,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 726 transitions. [2021-10-13 22:48:53,503 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8461538461538461 [2021-10-13 22:48:53,503 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 726 transitions. [2021-10-13 22:48:53,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 726 transitions. [2021-10-13 22:48:53,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:53,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 726 transitions. [2021-10-13 22:48:53,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 55.84615384615385) internal successors, (726), 13 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:53,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 66.0) internal successors, (924), 14 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:53,506 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 66.0) internal successors, (924), 14 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:53,506 INFO L186 Difference]: Start difference. First operand has 141 places, 99 transitions, 920 flow. Second operand 13 states and 726 transitions. [2021-10-13 22:48:53,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 116 transitions, 1594 flow [2021-10-13 22:48:53,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 116 transitions, 1370 flow, removed 85 selfloop flow, removed 15 redundant places. [2021-10-13 22:48:53,516 INFO L242 Difference]: Finished difference. Result has 138 places, 101 transitions, 860 flow [2021-10-13 22:48:53,516 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=724, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=860, PETRI_PLACES=138, PETRI_TRANSITIONS=101} [2021-10-13 22:48:53,516 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 72 predicate places. [2021-10-13 22:48:53,516 INFO L470 AbstractCegarLoop]: Abstraction has has 138 places, 101 transitions, 860 flow [2021-10-13 22:48:53,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 54.111111111111114) internal successors, (487), 9 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:53,517 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:53,517 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:48:53,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-13 22:48:53,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-13 22:48:53,734 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:53,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:53,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1124861891, now seen corresponding path program 2 times [2021-10-13 22:48:53,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:53,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901287131] [2021-10-13 22:48:53,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:53,734 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:53,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:53,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:53,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:53,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901287131] [2021-10-13 22:48:53,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901287131] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:53,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937418938] [2021-10-13 22:48:53,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:48:53,794 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:53,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:53,795 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) [2021-10-13 22:48:53,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-13 22:48:53,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:48:53,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:48:53,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 22:48:53,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:48:54,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:54,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937418938] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:54,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:48:54,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-10-13 22:48:54,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751713945] [2021-10-13 22:48:54,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 22:48:54,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:54,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 22:48:54,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-13 22:48:54,054 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:48:54,054 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 101 transitions, 860 flow. Second operand has 9 states, 9 states have (on average 54.111111111111114) internal successors, (487), 9 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:54,054 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:54,054 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:48:54,054 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:54,182 INFO L129 PetriNetUnfolder]: 69/411 cut-off events. [2021-10-13 22:48:54,182 INFO L130 PetriNetUnfolder]: For 8096/8211 co-relation queries the response was YES. [2021-10-13 22:48:54,185 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1880 conditions, 411 events. 69/411 cut-off events. For 8096/8211 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2120 event pairs, 0 based on Foata normal form. 37/409 useless extension candidates. Maximal degree in co-relation 1806. Up to 84 conditions per place. [2021-10-13 22:48:54,187 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 31 selfloop transitions, 45 changer transitions 8/128 dead transitions. [2021-10-13 22:48:54,187 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 128 transitions, 1852 flow [2021-10-13 22:48:54,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 22:48:54,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-13 22:48:54,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 895 transitions. [2021-10-13 22:48:54,188 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8475378787878788 [2021-10-13 22:48:54,188 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 895 transitions. [2021-10-13 22:48:54,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 895 transitions. [2021-10-13 22:48:54,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:54,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 895 transitions. [2021-10-13 22:48:54,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 55.9375) internal successors, (895), 16 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:54,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 66.0) internal successors, (1122), 17 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:54,191 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 66.0) internal successors, (1122), 17 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:54,191 INFO L186 Difference]: Start difference. First operand has 138 places, 101 transitions, 860 flow. Second operand 16 states and 895 transitions. [2021-10-13 22:48:54,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 128 transitions, 1852 flow [2021-10-13 22:48:54,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 128 transitions, 1560 flow, removed 125 selfloop flow, removed 12 redundant places. [2021-10-13 22:48:54,202 INFO L242 Difference]: Finished difference. Result has 145 places, 107 transitions, 1051 flow [2021-10-13 22:48:54,203 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1051, PETRI_PLACES=145, PETRI_TRANSITIONS=107} [2021-10-13 22:48:54,203 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 79 predicate places. [2021-10-13 22:48:54,203 INFO L470 AbstractCegarLoop]: Abstraction has has 145 places, 107 transitions, 1051 flow [2021-10-13 22:48:54,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 54.111111111111114) internal successors, (487), 9 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:54,203 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:54,203 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:48:54,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-13 22:48:54,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:54,425 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:54,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:54,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1890704053, now seen corresponding path program 3 times [2021-10-13 22:48:54,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:54,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527765885] [2021-10-13 22:48:54,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:54,426 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:54,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:54,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:54,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:54,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527765885] [2021-10-13 22:48:54,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527765885] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:54,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727490383] [2021-10-13 22:48:54,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:48:54,494 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:54,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:54,495 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) [2021-10-13 22:48:54,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 22:48:54,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 22:48:54,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:48:54,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 22:48:54,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:48:54,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:54,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727490383] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:54,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:48:54,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-10-13 22:48:54,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977158417] [2021-10-13 22:48:54,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 22:48:54,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:54,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 22:48:54,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-13 22:48:54,763 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:48:54,763 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 107 transitions, 1051 flow. Second operand has 10 states, 10 states have (on average 54.2) internal successors, (542), 10 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:54,763 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:54,763 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:48:54,763 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:54,945 INFO L129 PetriNetUnfolder]: 64/390 cut-off events. [2021-10-13 22:48:54,946 INFO L130 PetriNetUnfolder]: For 7749/7893 co-relation queries the response was YES. [2021-10-13 22:48:54,948 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1768 conditions, 390 events. 64/390 cut-off events. For 7749/7893 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1997 event pairs, 0 based on Foata normal form. 47/399 useless extension candidates. Maximal degree in co-relation 1692. Up to 80 conditions per place. [2021-10-13 22:48:54,950 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 25 selfloop transitions, 51 changer transitions 11/131 dead transitions. [2021-10-13 22:48:54,950 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 131 transitions, 2003 flow [2021-10-13 22:48:54,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 22:48:54,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-13 22:48:54,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 892 transitions. [2021-10-13 22:48:54,951 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8446969696969697 [2021-10-13 22:48:54,951 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 892 transitions. [2021-10-13 22:48:54,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 892 transitions. [2021-10-13 22:48:54,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:54,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 892 transitions. [2021-10-13 22:48:54,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 55.75) internal successors, (892), 16 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:54,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 66.0) internal successors, (1122), 17 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:54,954 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 66.0) internal successors, (1122), 17 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:54,954 INFO L186 Difference]: Start difference. First operand has 145 places, 107 transitions, 1051 flow. Second operand 16 states and 892 transitions. [2021-10-13 22:48:54,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 131 transitions, 2003 flow [2021-10-13 22:48:54,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 131 transitions, 1792 flow, removed 77 selfloop flow, removed 11 redundant places. [2021-10-13 22:48:54,966 INFO L242 Difference]: Finished difference. Result has 152 places, 110 transitions, 1167 flow [2021-10-13 22:48:54,967 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=924, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1167, PETRI_PLACES=152, PETRI_TRANSITIONS=110} [2021-10-13 22:48:54,967 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 86 predicate places. [2021-10-13 22:48:54,967 INFO L470 AbstractCegarLoop]: Abstraction has has 152 places, 110 transitions, 1167 flow [2021-10-13 22:48:54,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 54.2) internal successors, (542), 10 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:54,967 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:54,967 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 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] [2021-10-13 22:48:54,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 22:48:55,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:55,184 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:55,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:55,184 INFO L82 PathProgramCache]: Analyzing trace with hash 823614762, now seen corresponding path program 4 times [2021-10-13 22:48:55,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:55,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964314393] [2021-10-13 22:48:55,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:55,185 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:55,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:55,278 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:55,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:55,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964314393] [2021-10-13 22:48:55,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964314393] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:55,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643537207] [2021-10-13 22:48:55,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:48:55,279 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:55,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:55,279 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) [2021-10-13 22:48:55,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 22:48:55,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:48:55,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:48:55,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 22:48:55,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:48:55,640 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:55,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643537207] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:55,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:48:55,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-10-13 22:48:55,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753921772] [2021-10-13 22:48:55,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 22:48:55,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:55,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 22:48:55,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-10-13 22:48:55,642 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:48:55,643 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 110 transitions, 1167 flow. Second operand has 11 states, 11 states have (on average 54.18181818181818) internal successors, (596), 11 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:55,643 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:55,643 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:48:55,643 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:55,759 INFO L129 PetriNetUnfolder]: 64/397 cut-off events. [2021-10-13 22:48:55,759 INFO L130 PetriNetUnfolder]: For 7877/7995 co-relation queries the response was YES. [2021-10-13 22:48:55,761 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1813 conditions, 397 events. 64/397 cut-off events. For 7877/7995 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2035 event pairs, 0 based on Foata normal form. 39/397 useless extension candidates. Maximal degree in co-relation 1734. Up to 87 conditions per place. [2021-10-13 22:48:55,763 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 60 selfloop transitions, 15 changer transitions 8/127 dead transitions. [2021-10-13 22:48:55,763 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 127 transitions, 1931 flow [2021-10-13 22:48:55,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 22:48:55,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-13 22:48:55,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 725 transitions. [2021-10-13 22:48:55,765 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.844988344988345 [2021-10-13 22:48:55,765 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 725 transitions. [2021-10-13 22:48:55,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 725 transitions. [2021-10-13 22:48:55,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:55,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 725 transitions. [2021-10-13 22:48:55,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 55.76923076923077) internal successors, (725), 13 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:55,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 66.0) internal successors, (924), 14 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:55,767 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 66.0) internal successors, (924), 14 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:55,767 INFO L186 Difference]: Start difference. First operand has 152 places, 110 transitions, 1167 flow. Second operand 13 states and 725 transitions. [2021-10-13 22:48:55,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 127 transitions, 1931 flow [2021-10-13 22:48:55,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 127 transitions, 1732 flow, removed 56 selfloop flow, removed 14 redundant places. [2021-10-13 22:48:55,780 INFO L242 Difference]: Finished difference. Result has 152 places, 112 transitions, 1120 flow [2021-10-13 22:48:55,781 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1002, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1120, PETRI_PLACES=152, PETRI_TRANSITIONS=112} [2021-10-13 22:48:55,781 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 86 predicate places. [2021-10-13 22:48:55,781 INFO L470 AbstractCegarLoop]: Abstraction has has 152 places, 112 transitions, 1120 flow [2021-10-13 22:48:55,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 54.18181818181818) internal successors, (596), 11 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:55,781 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:55,781 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 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] [2021-10-13 22:48:55,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-13 22:48:56,002 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,SelfDestructingSolverStorable12 [2021-10-13 22:48:56,002 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:56,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:56,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1156057902, now seen corresponding path program 5 times [2021-10-13 22:48:56,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:56,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344446544] [2021-10-13 22:48:56,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:56,003 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:56,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:56,085 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:56,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:56,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344446544] [2021-10-13 22:48:56,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344446544] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:56,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257953344] [2021-10-13 22:48:56,085 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:48:56,085 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:56,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:56,086 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) [2021-10-13 22:48:56,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-13 22:48:56,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 22:48:56,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:48:56,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 22:48:56,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:48:56,464 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:56,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257953344] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:56,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:48:56,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-10-13 22:48:56,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569854612] [2021-10-13 22:48:56,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 22:48:56,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:56,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 22:48:56,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-10-13 22:48:56,466 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:48:56,467 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 112 transitions, 1120 flow. Second operand has 12 states, 12 states have (on average 54.25) internal successors, (651), 12 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:56,467 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:56,467 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:48:56,467 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:56,644 INFO L129 PetriNetUnfolder]: 66/415 cut-off events. [2021-10-13 22:48:56,644 INFO L130 PetriNetUnfolder]: For 8921/9038 co-relation queries the response was YES. [2021-10-13 22:48:56,646 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1893 conditions, 415 events. 66/415 cut-off events. For 8921/9038 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2153 event pairs, 0 based on Foata normal form. 41/414 useless extension candidates. Maximal degree in co-relation 1814. Up to 82 conditions per place. [2021-10-13 22:48:56,648 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 53 selfloop transitions, 25 changer transitions 8/130 dead transitions. [2021-10-13 22:48:56,649 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 130 transitions, 1956 flow [2021-10-13 22:48:56,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 22:48:56,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-13 22:48:56,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 892 transitions. [2021-10-13 22:48:56,650 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8446969696969697 [2021-10-13 22:48:56,650 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 892 transitions. [2021-10-13 22:48:56,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 892 transitions. [2021-10-13 22:48:56,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:56,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 892 transitions. [2021-10-13 22:48:56,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 55.75) internal successors, (892), 16 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:56,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 66.0) internal successors, (1122), 17 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:56,652 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 66.0) internal successors, (1122), 17 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:56,652 INFO L186 Difference]: Start difference. First operand has 152 places, 112 transitions, 1120 flow. Second operand 16 states and 892 transitions. [2021-10-13 22:48:56,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 130 transitions, 1956 flow [2021-10-13 22:48:56,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 130 transitions, 1728 flow, removed 101 selfloop flow, removed 10 redundant places. [2021-10-13 22:48:56,668 INFO L242 Difference]: Finished difference. Result has 159 places, 114 transitions, 1160 flow [2021-10-13 22:48:56,668 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1024, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1160, PETRI_PLACES=159, PETRI_TRANSITIONS=114} [2021-10-13 22:48:56,668 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 93 predicate places. [2021-10-13 22:48:56,668 INFO L470 AbstractCegarLoop]: Abstraction has has 159 places, 114 transitions, 1160 flow [2021-10-13 22:48:56,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.25) internal successors, (651), 12 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:56,668 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:56,669 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 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] [2021-10-13 22:48:56,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-10-13 22:48:56,883 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,SelfDestructingSolverStorable13 [2021-10-13 22:48:56,883 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:56,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:56,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1517059746, now seen corresponding path program 6 times [2021-10-13 22:48:56,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:56,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676482656] [2021-10-13 22:48:56,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:56,884 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:56,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:56,945 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:56,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:56,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676482656] [2021-10-13 22:48:56,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676482656] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:56,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893141498] [2021-10-13 22:48:56,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:48:56,945 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:56,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:56,946 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) [2021-10-13 22:48:56,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-13 22:48:57,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 22:48:57,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:48:57,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 22:48:57,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:48:57,308 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:57,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893141498] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:57,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:48:57,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-10-13 22:48:57,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28301846] [2021-10-13 22:48:57,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 22:48:57,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:57,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 22:48:57,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-13 22:48:57,309 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:48:57,310 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 114 transitions, 1160 flow. Second operand has 11 states, 11 states have (on average 54.18181818181818) internal successors, (596), 11 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:57,310 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:57,310 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:48:57,310 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:57,468 INFO L129 PetriNetUnfolder]: 68/433 cut-off events. [2021-10-13 22:48:57,468 INFO L130 PetriNetUnfolder]: For 7966/8073 co-relation queries the response was YES. [2021-10-13 22:48:57,471 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1893 conditions, 433 events. 68/433 cut-off events. For 7966/8073 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2303 event pairs, 0 based on Foata normal form. 44/433 useless extension candidates. Maximal degree in co-relation 1812. Up to 86 conditions per place. [2021-10-13 22:48:57,473 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 49 selfloop transitions, 32 changer transitions 8/133 dead transitions. [2021-10-13 22:48:57,473 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 133 transitions, 1980 flow [2021-10-13 22:48:57,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 22:48:57,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-13 22:48:57,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 948 transitions. [2021-10-13 22:48:57,475 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8449197860962567 [2021-10-13 22:48:57,475 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 948 transitions. [2021-10-13 22:48:57,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 948 transitions. [2021-10-13 22:48:57,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:57,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 948 transitions. [2021-10-13 22:48:57,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 55.76470588235294) internal successors, (948), 17 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:57,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 66.0) internal successors, (1188), 18 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:57,478 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 66.0) internal successors, (1188), 18 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:57,478 INFO L186 Difference]: Start difference. First operand has 159 places, 114 transitions, 1160 flow. Second operand 17 states and 948 transitions. [2021-10-13 22:48:57,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 133 transitions, 1980 flow [2021-10-13 22:48:57,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 133 transitions, 1816 flow, removed 61 selfloop flow, removed 13 redundant places. [2021-10-13 22:48:57,490 INFO L242 Difference]: Finished difference. Result has 164 places, 116 transitions, 1226 flow [2021-10-13 22:48:57,490 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1072, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1226, PETRI_PLACES=164, PETRI_TRANSITIONS=116} [2021-10-13 22:48:57,490 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 98 predicate places. [2021-10-13 22:48:57,490 INFO L470 AbstractCegarLoop]: Abstraction has has 164 places, 116 transitions, 1226 flow [2021-10-13 22:48:57,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 54.18181818181818) internal successors, (596), 11 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:57,491 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:57,491 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 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] [2021-10-13 22:48:57,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-13 22:48:57,705 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,SelfDestructingSolverStorable14 [2021-10-13 22:48:57,705 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:57,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:57,705 INFO L82 PathProgramCache]: Analyzing trace with hash -547396332, now seen corresponding path program 7 times [2021-10-13 22:48:57,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:57,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197153037] [2021-10-13 22:48:57,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:57,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:57,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:57,760 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:57,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:57,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197153037] [2021-10-13 22:48:57,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197153037] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:57,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041105819] [2021-10-13 22:48:57,761 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:48:57,761 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:57,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:57,762 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) [2021-10-13 22:48:57,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-13 22:48:57,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:57,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 22:48:57,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:48:58,159 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:58,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041105819] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:58,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:48:58,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-10-13 22:48:58,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131639032] [2021-10-13 22:48:58,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 22:48:58,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:58,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 22:48:58,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-13 22:48:58,161 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:48:58,161 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 116 transitions, 1226 flow. Second operand has 11 states, 11 states have (on average 54.18181818181818) internal successors, (596), 11 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:58,161 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:58,161 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:48:58,161 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:58,358 INFO L129 PetriNetUnfolder]: 86/520 cut-off events. [2021-10-13 22:48:58,358 INFO L130 PetriNetUnfolder]: For 10312/10461 co-relation queries the response was YES. [2021-10-13 22:48:58,361 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2414 conditions, 520 events. 86/520 cut-off events. For 10312/10461 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2918 event pairs, 0 based on Foata normal form. 49/516 useless extension candidates. Maximal degree in co-relation 2331. Up to 110 conditions per place. [2021-10-13 22:48:58,363 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 40 selfloop transitions, 56 changer transitions 8/148 dead transitions. [2021-10-13 22:48:58,364 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 148 transitions, 2368 flow [2021-10-13 22:48:58,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 22:48:58,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-13 22:48:58,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1117 transitions. [2021-10-13 22:48:58,365 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8462121212121212 [2021-10-13 22:48:58,365 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1117 transitions. [2021-10-13 22:48:58,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1117 transitions. [2021-10-13 22:48:58,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:58,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1117 transitions. [2021-10-13 22:48:58,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 55.85) internal successors, (1117), 20 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:58,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 66.0) internal successors, (1386), 21 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:58,368 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 66.0) internal successors, (1386), 21 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:58,368 INFO L186 Difference]: Start difference. First operand has 164 places, 116 transitions, 1226 flow. Second operand 20 states and 1117 transitions. [2021-10-13 22:48:58,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 148 transitions, 2368 flow [2021-10-13 22:48:58,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 148 transitions, 2152 flow, removed 82 selfloop flow, removed 14 redundant places. [2021-10-13 22:48:58,384 INFO L242 Difference]: Finished difference. Result has 175 places, 125 transitions, 1548 flow [2021-10-13 22:48:58,384 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1128, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1548, PETRI_PLACES=175, PETRI_TRANSITIONS=125} [2021-10-13 22:48:58,384 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 109 predicate places. [2021-10-13 22:48:58,384 INFO L470 AbstractCegarLoop]: Abstraction has has 175 places, 125 transitions, 1548 flow [2021-10-13 22:48:58,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 54.18181818181818) internal successors, (596), 11 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:58,385 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:58,385 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 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] [2021-10-13 22:48:58,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-13 22:48:58,602 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,SelfDestructingSolverStorable15 [2021-10-13 22:48:58,602 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:58,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:58,602 INFO L82 PathProgramCache]: Analyzing trace with hash -863268282, now seen corresponding path program 8 times [2021-10-13 22:48:58,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:58,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583816267] [2021-10-13 22:48:58,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:58,603 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:58,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:58,660 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:58,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:58,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583816267] [2021-10-13 22:48:58,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583816267] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:58,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677290618] [2021-10-13 22:48:58,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:48:58,661 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:58,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:58,662 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) [2021-10-13 22:48:58,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-13 22:48:58,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:48:58,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:48:58,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 22:48:58,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:48:59,013 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:59,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677290618] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:59,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:48:59,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-10-13 22:48:59,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115925855] [2021-10-13 22:48:59,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 22:48:59,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:59,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 22:48:59,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-13 22:48:59,015 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:48:59,015 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 125 transitions, 1548 flow. Second operand has 12 states, 12 states have (on average 54.166666666666664) internal successors, (650), 12 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:59,015 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:59,015 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:48:59,015 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:59,353 INFO L129 PetriNetUnfolder]: 92/559 cut-off events. [2021-10-13 22:48:59,353 INFO L130 PetriNetUnfolder]: For 13074/13244 co-relation queries the response was YES. [2021-10-13 22:48:59,356 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2783 conditions, 559 events. 92/559 cut-off events. For 13074/13244 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3294 event pairs, 0 based on Foata normal form. 50/553 useless extension candidates. Maximal degree in co-relation 2693. Up to 122 conditions per place. [2021-10-13 22:48:59,358 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 39 selfloop transitions, 66 changer transitions 17/166 dead transitions. [2021-10-13 22:48:59,359 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 166 transitions, 3137 flow [2021-10-13 22:48:59,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 22:48:59,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-13 22:48:59,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1338 transitions. [2021-10-13 22:48:59,363 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8446969696969697 [2021-10-13 22:48:59,363 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1338 transitions. [2021-10-13 22:48:59,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1338 transitions. [2021-10-13 22:48:59,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:59,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1338 transitions. [2021-10-13 22:48:59,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 55.75) internal successors, (1338), 24 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:59,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:59,367 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:59,367 INFO L186 Difference]: Start difference. First operand has 175 places, 125 transitions, 1548 flow. Second operand 24 states and 1338 transitions. [2021-10-13 22:48:59,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 166 transitions, 3137 flow [2021-10-13 22:48:59,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 166 transitions, 2873 flow, removed 102 selfloop flow, removed 15 redundant places. [2021-10-13 22:48:59,386 INFO L242 Difference]: Finished difference. Result has 190 places, 137 transitions, 1920 flow [2021-10-13 22:48:59,386 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1396, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1920, PETRI_PLACES=190, PETRI_TRANSITIONS=137} [2021-10-13 22:48:59,387 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 124 predicate places. [2021-10-13 22:48:59,387 INFO L470 AbstractCegarLoop]: Abstraction has has 190 places, 137 transitions, 1920 flow [2021-10-13 22:48:59,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.166666666666664) internal successors, (650), 12 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:59,396 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:59,396 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:48:59,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-13 22:48:59,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-13 22:48:59,613 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:59,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:59,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1984486184, now seen corresponding path program 9 times [2021-10-13 22:48:59,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:59,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147890904] [2021-10-13 22:48:59,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:59,614 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:59,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:59,693 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:59,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:59,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147890904] [2021-10-13 22:48:59,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147890904] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:59,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96617616] [2021-10-13 22:48:59,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:48:59,694 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:59,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:59,695 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) [2021-10-13 22:48:59,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-13 22:48:59,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 22:48:59,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:48:59,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 22:48:59,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:00,176 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:00,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96617616] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:00,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:00,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-10-13 22:49:00,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838146474] [2021-10-13 22:49:00,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 22:49:00,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:00,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 22:49:00,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-10-13 22:49:00,178 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:49:00,178 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 137 transitions, 1920 flow. Second operand has 11 states, 11 states have (on average 54.09090909090909) internal successors, (595), 11 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:00,179 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:00,179 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:49:00,179 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:00,340 INFO L129 PetriNetUnfolder]: 88/553 cut-off events. [2021-10-13 22:49:00,340 INFO L130 PetriNetUnfolder]: For 18083/18255 co-relation queries the response was YES. [2021-10-13 22:49:00,343 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2939 conditions, 553 events. 88/553 cut-off events. For 18083/18255 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3209 event pairs, 0 based on Foata normal form. 31/527 useless extension candidates. Maximal degree in co-relation 2844. Up to 115 conditions per place. [2021-10-13 22:49:00,346 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 75 selfloop transitions, 29 changer transitions 8/156 dead transitions. [2021-10-13 22:49:00,347 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 156 transitions, 2978 flow [2021-10-13 22:49:00,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 22:49:00,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-13 22:49:00,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 836 transitions. [2021-10-13 22:49:00,348 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8444444444444444 [2021-10-13 22:49:00,348 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 836 transitions. [2021-10-13 22:49:00,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 836 transitions. [2021-10-13 22:49:00,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:00,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 836 transitions. [2021-10-13 22:49:00,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 55.733333333333334) internal successors, (836), 15 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:00,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 66.0) internal successors, (1056), 16 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:00,350 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 66.0) internal successors, (1056), 16 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:00,350 INFO L186 Difference]: Start difference. First operand has 190 places, 137 transitions, 1920 flow. Second operand 15 states and 836 transitions. [2021-10-13 22:49:00,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 156 transitions, 2978 flow [2021-10-13 22:49:00,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 156 transitions, 2588 flow, removed 156 selfloop flow, removed 18 redundant places. [2021-10-13 22:49:00,374 INFO L242 Difference]: Finished difference. Result has 186 places, 139 transitions, 1762 flow [2021-10-13 22:49:00,374 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1596, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1762, PETRI_PLACES=186, PETRI_TRANSITIONS=139} [2021-10-13 22:49:00,374 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 120 predicate places. [2021-10-13 22:49:00,374 INFO L470 AbstractCegarLoop]: Abstraction has has 186 places, 139 transitions, 1762 flow [2021-10-13 22:49:00,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 54.09090909090909) internal successors, (595), 11 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:00,375 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:00,375 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:49:00,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-13 22:49:00,591 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,SelfDestructingSolverStorable17 [2021-10-13 22:49:00,591 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:00,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:00,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1804080638, now seen corresponding path program 10 times [2021-10-13 22:49:00,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:00,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122893960] [2021-10-13 22:49:00,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:00,592 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:00,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:00,675 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:00,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:00,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122893960] [2021-10-13 22:49:00,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122893960] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:00,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532544759] [2021-10-13 22:49:00,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:49:00,675 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:00,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:00,676 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) [2021-10-13 22:49:00,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-13 22:49:00,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:49:00,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:00,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 22:49:00,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:01,170 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:01,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532544759] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:01,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:01,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-10-13 22:49:01,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416110749] [2021-10-13 22:49:01,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 22:49:01,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:01,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 22:49:01,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-13 22:49:01,172 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:49:01,172 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 139 transitions, 1762 flow. Second operand has 12 states, 12 states have (on average 54.166666666666664) internal successors, (650), 12 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:01,172 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:01,172 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:49:01,172 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:01,396 INFO L129 PetriNetUnfolder]: 93/591 cut-off events. [2021-10-13 22:49:01,396 INFO L130 PetriNetUnfolder]: For 18410/18567 co-relation queries the response was YES. [2021-10-13 22:49:01,400 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3024 conditions, 591 events. 93/591 cut-off events. For 18410/18567 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 3598 event pairs, 0 based on Foata normal form. 42/573 useless extension candidates. Maximal degree in co-relation 2929. Up to 117 conditions per place. [2021-10-13 22:49:01,403 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 59 selfloop transitions, 54 changer transitions 8/165 dead transitions. [2021-10-13 22:49:01,403 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 165 transitions, 2995 flow [2021-10-13 22:49:01,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-13 22:49:01,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-13 22:49:01,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1056 transitions. [2021-10-13 22:49:01,407 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8421052631578947 [2021-10-13 22:49:01,407 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1056 transitions. [2021-10-13 22:49:01,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1056 transitions. [2021-10-13 22:49:01,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:01,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1056 transitions. [2021-10-13 22:49:01,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 55.578947368421055) internal successors, (1056), 19 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:01,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 66.0) internal successors, (1320), 20 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:01,414 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 66.0) internal successors, (1320), 20 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:01,414 INFO L186 Difference]: Start difference. First operand has 186 places, 139 transitions, 1762 flow. Second operand 19 states and 1056 transitions. [2021-10-13 22:49:01,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 165 transitions, 2995 flow [2021-10-13 22:49:01,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 165 transitions, 2779 flow, removed 83 selfloop flow, removed 12 redundant places. [2021-10-13 22:49:01,439 INFO L242 Difference]: Finished difference. Result has 197 places, 146 transitions, 2006 flow [2021-10-13 22:49:01,439 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1650, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2006, PETRI_PLACES=197, PETRI_TRANSITIONS=146} [2021-10-13 22:49:01,439 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 131 predicate places. [2021-10-13 22:49:01,439 INFO L470 AbstractCegarLoop]: Abstraction has has 197 places, 146 transitions, 2006 flow [2021-10-13 22:49:01,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.166666666666664) internal successors, (650), 12 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:01,440 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:01,440 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:49:01,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-13 22:49:01,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:01,657 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:01,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:01,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1223348734, now seen corresponding path program 11 times [2021-10-13 22:49:01,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:01,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885350735] [2021-10-13 22:49:01,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:01,658 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:01,726 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:01,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:01,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885350735] [2021-10-13 22:49:01,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885350735] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:01,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603261273] [2021-10-13 22:49:01,726 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:49:01,726 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:01,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:01,727 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) [2021-10-13 22:49:01,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-13 22:49:02,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 22:49:02,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:02,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 22:49:02,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:02,227 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:02,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603261273] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:02,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:02,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-10-13 22:49:02,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94471940] [2021-10-13 22:49:02,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 22:49:02,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:02,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 22:49:02,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-13 22:49:02,228 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:49:02,228 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 146 transitions, 2006 flow. Second operand has 11 states, 11 states have (on average 54.09090909090909) internal successors, (595), 11 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:02,228 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:02,229 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:49:02,229 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:02,438 INFO L129 PetriNetUnfolder]: 95/609 cut-off events. [2021-10-13 22:49:02,438 INFO L130 PetriNetUnfolder]: For 19081/19239 co-relation queries the response was YES. [2021-10-13 22:49:02,441 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3174 conditions, 609 events. 95/609 cut-off events. For 19081/19239 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3755 event pairs, 0 based on Foata normal form. 49/596 useless extension candidates. Maximal degree in co-relation 3074. Up to 121 conditions per place. [2021-10-13 22:49:02,444 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 51 selfloop transitions, 65 changer transitions 8/168 dead transitions. [2021-10-13 22:49:02,444 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 168 transitions, 3191 flow [2021-10-13 22:49:02,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 22:49:02,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-10-13 22:49:02,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1001 transitions. [2021-10-13 22:49:02,447 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8425925925925926 [2021-10-13 22:49:02,447 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1001 transitions. [2021-10-13 22:49:02,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1001 transitions. [2021-10-13 22:49:02,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:02,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1001 transitions. [2021-10-13 22:49:02,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 55.611111111111114) internal successors, (1001), 18 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:02,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 66.0) internal successors, (1254), 19 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:02,450 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 66.0) internal successors, (1254), 19 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:02,450 INFO L186 Difference]: Start difference. First operand has 197 places, 146 transitions, 2006 flow. Second operand 18 states and 1001 transitions. [2021-10-13 22:49:02,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 168 transitions, 3191 flow [2021-10-13 22:49:02,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 168 transitions, 2960 flow, removed 72 selfloop flow, removed 14 redundant places. [2021-10-13 22:49:02,475 INFO L242 Difference]: Finished difference. Result has 202 places, 148 transitions, 2091 flow [2021-10-13 22:49:02,475 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1835, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2091, PETRI_PLACES=202, PETRI_TRANSITIONS=148} [2021-10-13 22:49:02,476 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 136 predicate places. [2021-10-13 22:49:02,476 INFO L470 AbstractCegarLoop]: Abstraction has has 202 places, 148 transitions, 2091 flow [2021-10-13 22:49:02,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 54.09090909090909) internal successors, (595), 11 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:02,476 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:02,476 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:49:02,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-13 22:49:02,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:02,693 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:02,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:02,694 INFO L82 PathProgramCache]: Analyzing trace with hash -526176844, now seen corresponding path program 12 times [2021-10-13 22:49:02,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:02,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713488160] [2021-10-13 22:49:02,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:02,694 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:02,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:02,769 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:02,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:02,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713488160] [2021-10-13 22:49:02,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713488160] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:02,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349503959] [2021-10-13 22:49:02,769 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:49:02,769 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:02,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:02,770 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) [2021-10-13 22:49:02,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-13 22:49:03,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 22:49:03,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:03,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 22:49:03,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:03,343 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:03,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349503959] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:03,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:03,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-10-13 22:49:03,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335892673] [2021-10-13 22:49:03,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 22:49:03,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:03,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 22:49:03,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-13 22:49:03,344 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:49:03,345 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 148 transitions, 2091 flow. Second operand has 12 states, 12 states have (on average 54.166666666666664) internal successors, (650), 12 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:03,345 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:03,345 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:49:03,345 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:03,606 INFO L129 PetriNetUnfolder]: 101/656 cut-off events. [2021-10-13 22:49:03,606 INFO L130 PetriNetUnfolder]: For 21229/21393 co-relation queries the response was YES. [2021-10-13 22:49:03,610 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3497 conditions, 656 events. 101/656 cut-off events. For 21229/21393 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 4178 event pairs, 0 based on Foata normal form. 58/648 useless extension candidates. Maximal degree in co-relation 3396. Up to 131 conditions per place. [2021-10-13 22:49:03,614 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 40 selfloop transitions, 84 changer transitions 8/176 dead transitions. [2021-10-13 22:49:03,614 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 176 transitions, 3503 flow [2021-10-13 22:49:03,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-13 22:49:03,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-13 22:49:03,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1168 transitions. [2021-10-13 22:49:03,617 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8427128427128427 [2021-10-13 22:49:03,617 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1168 transitions. [2021-10-13 22:49:03,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1168 transitions. [2021-10-13 22:49:03,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:03,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1168 transitions. [2021-10-13 22:49:03,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 55.61904761904762) internal successors, (1168), 21 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:03,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 66.0) internal successors, (1452), 22 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:03,622 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 66.0) internal successors, (1452), 22 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:03,622 INFO L186 Difference]: Start difference. First operand has 202 places, 148 transitions, 2091 flow. Second operand 21 states and 1168 transitions. [2021-10-13 22:49:03,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 176 transitions, 3503 flow [2021-10-13 22:49:03,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 176 transitions, 3193 flow, removed 102 selfloop flow, removed 15 redundant places. [2021-10-13 22:49:03,653 INFO L242 Difference]: Finished difference. Result has 210 places, 155 transitions, 2374 flow [2021-10-13 22:49:03,653 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1925, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2374, PETRI_PLACES=210, PETRI_TRANSITIONS=155} [2021-10-13 22:49:03,653 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 144 predicate places. [2021-10-13 22:49:03,653 INFO L470 AbstractCegarLoop]: Abstraction has has 210 places, 155 transitions, 2374 flow [2021-10-13 22:49:03,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.166666666666664) internal successors, (650), 12 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:03,654 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:03,654 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:49:03,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-13 22:49:03,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:03,871 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:03,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:03,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1352190792, now seen corresponding path program 13 times [2021-10-13 22:49:03,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:03,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476220329] [2021-10-13 22:49:03,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:03,871 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:03,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:03,930 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:03,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:03,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476220329] [2021-10-13 22:49:03,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476220329] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:03,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808735056] [2021-10-13 22:49:03,931 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:49:03,932 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:03,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:03,933 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) [2021-10-13 22:49:03,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-13 22:49:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:04,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 22:49:04,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:04,459 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:04,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808735056] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:04,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:04,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-10-13 22:49:04,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763315090] [2021-10-13 22:49:04,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 22:49:04,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:04,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 22:49:04,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-10-13 22:49:04,460 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:49:04,461 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 155 transitions, 2374 flow. Second operand has 11 states, 11 states have (on average 54.09090909090909) internal successors, (595), 11 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:04,461 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:04,461 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:49:04,461 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:04,701 INFO L129 PetriNetUnfolder]: 116/724 cut-off events. [2021-10-13 22:49:04,701 INFO L130 PetriNetUnfolder]: For 23552/23739 co-relation queries the response was YES. [2021-10-13 22:49:04,706 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4042 conditions, 724 events. 116/724 cut-off events. For 23552/23739 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 4721 event pairs, 0 based on Foata normal form. 60/712 useless extension candidates. Maximal degree in co-relation 3938. Up to 151 conditions per place. [2021-10-13 22:49:04,710 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 43 selfloop transitions, 92 changer transitions 8/187 dead transitions. [2021-10-13 22:49:04,710 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 187 transitions, 3909 flow [2021-10-13 22:49:04,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 22:49:04,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-13 22:49:04,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1117 transitions. [2021-10-13 22:49:04,712 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8462121212121212 [2021-10-13 22:49:04,712 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1117 transitions. [2021-10-13 22:49:04,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1117 transitions. [2021-10-13 22:49:04,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:04,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1117 transitions. [2021-10-13 22:49:04,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 55.85) internal successors, (1117), 20 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:04,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 66.0) internal successors, (1386), 21 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:04,714 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 66.0) internal successors, (1386), 21 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:04,715 INFO L186 Difference]: Start difference. First operand has 210 places, 155 transitions, 2374 flow. Second operand 20 states and 1117 transitions. [2021-10-13 22:49:04,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 187 transitions, 3909 flow [2021-10-13 22:49:04,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 187 transitions, 3567 flow, removed 106 selfloop flow, removed 17 redundant places. [2021-10-13 22:49:04,750 INFO L242 Difference]: Finished difference. Result has 216 places, 161 transitions, 2622 flow [2021-10-13 22:49:04,750 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2126, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2622, PETRI_PLACES=216, PETRI_TRANSITIONS=161} [2021-10-13 22:49:04,750 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 150 predicate places. [2021-10-13 22:49:04,750 INFO L470 AbstractCegarLoop]: Abstraction has has 216 places, 161 transitions, 2622 flow [2021-10-13 22:49:04,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 54.09090909090909) internal successors, (595), 11 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:04,750 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:04,750 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:49:04,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-13 22:49:04,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:04,963 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:04,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:04,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1417546304, now seen corresponding path program 14 times [2021-10-13 22:49:04,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:04,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449710976] [2021-10-13 22:49:04,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:04,964 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:04,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:05,048 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:05,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:05,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449710976] [2021-10-13 22:49:05,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449710976] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:05,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43211343] [2021-10-13 22:49:05,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:49:05,049 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:05,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:05,064 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) [2021-10-13 22:49:05,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-13 22:49:05,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:49:05,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:05,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:49:05,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:05,645 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:05,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43211343] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:05,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:05,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-10-13 22:49:05,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644550159] [2021-10-13 22:49:05,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 22:49:05,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:05,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 22:49:05,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-10-13 22:49:05,646 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:49:05,647 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 161 transitions, 2622 flow. Second operand has 13 states, 13 states have (on average 54.15384615384615) internal successors, (704), 13 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) [2021-10-13 22:49:05,647 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:05,647 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:49:05,647 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:05,971 INFO L129 PetriNetUnfolder]: 117/740 cut-off events. [2021-10-13 22:49:05,971 INFO L130 PetriNetUnfolder]: For 28928/29136 co-relation queries the response was YES. [2021-10-13 22:49:05,975 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4341 conditions, 740 events. 117/740 cut-off events. For 28928/29136 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4852 event pairs, 0 based on Foata normal form. 70/737 useless extension candidates. Maximal degree in co-relation 4233. Up to 151 conditions per place. [2021-10-13 22:49:05,979 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 35 selfloop transitions, 104 changer transitions 17/200 dead transitions. [2021-10-13 22:49:05,979 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 200 transitions, 4733 flow [2021-10-13 22:49:05,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 22:49:05,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-13 22:49:05,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1338 transitions. [2021-10-13 22:49:05,980 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8446969696969697 [2021-10-13 22:49:05,980 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1338 transitions. [2021-10-13 22:49:05,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1338 transitions. [2021-10-13 22:49:05,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:05,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1338 transitions. [2021-10-13 22:49:05,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 55.75) internal successors, (1338), 24 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:05,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:05,984 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:05,984 INFO L186 Difference]: Start difference. First operand has 216 places, 161 transitions, 2622 flow. Second operand 24 states and 1338 transitions. [2021-10-13 22:49:05,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 200 transitions, 4733 flow [2021-10-13 22:49:06,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 200 transitions, 4297 flow, removed 154 selfloop flow, removed 15 redundant places. [2021-10-13 22:49:06,021 INFO L242 Difference]: Finished difference. Result has 231 places, 169 transitions, 2990 flow [2021-10-13 22:49:06,021 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2364, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2990, PETRI_PLACES=231, PETRI_TRANSITIONS=169} [2021-10-13 22:49:06,021 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 165 predicate places. [2021-10-13 22:49:06,022 INFO L470 AbstractCegarLoop]: Abstraction has has 231 places, 169 transitions, 2990 flow [2021-10-13 22:49:06,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.15384615384615) internal successors, (704), 13 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) [2021-10-13 22:49:06,022 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:06,022 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:49:06,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-13 22:49:06,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:06,235 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:06,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:06,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1303582700, now seen corresponding path program 15 times [2021-10-13 22:49:06,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:06,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047550810] [2021-10-13 22:49:06,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:06,236 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:06,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:06,300 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 22:49:06,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:06,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047550810] [2021-10-13 22:49:06,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047550810] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:06,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731632451] [2021-10-13 22:49:06,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:49:06,300 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:06,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:06,301 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) [2021-10-13 22:49:06,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-13 22:49:06,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-13 22:49:06,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:06,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:49:06,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:06,878 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 22:49:06,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731632451] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:06,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:06,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-10-13 22:49:06,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147085159] [2021-10-13 22:49:06,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 22:49:06,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:06,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 22:49:06,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-10-13 22:49:06,879 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:49:06,880 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 169 transitions, 2990 flow. Second operand has 13 states, 13 states have (on average 54.23076923076923) internal successors, (705), 13 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:06,880 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:06,880 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:49:06,880 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:07,209 INFO L129 PetriNetUnfolder]: 130/827 cut-off events. [2021-10-13 22:49:07,209 INFO L130 PetriNetUnfolder]: For 40271/40479 co-relation queries the response was YES. [2021-10-13 22:49:07,215 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5200 conditions, 827 events. 130/827 cut-off events. For 40271/40479 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 5774 event pairs, 0 based on Foata normal form. 73/818 useless extension candidates. Maximal degree in co-relation 5085. Up to 169 conditions per place. [2021-10-13 22:49:07,220 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 68 selfloop transitions, 91 changer transitions 11/214 dead transitions. [2021-10-13 22:49:07,220 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 214 transitions, 5378 flow [2021-10-13 22:49:07,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 22:49:07,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-13 22:49:07,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1337 transitions. [2021-10-13 22:49:07,243 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8440656565656566 [2021-10-13 22:49:07,243 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1337 transitions. [2021-10-13 22:49:07,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1337 transitions. [2021-10-13 22:49:07,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:07,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1337 transitions. [2021-10-13 22:49:07,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 55.708333333333336) internal successors, (1337), 24 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:07,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:07,250 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:07,250 INFO L186 Difference]: Start difference. First operand has 231 places, 169 transitions, 2990 flow. Second operand 24 states and 1337 transitions. [2021-10-13 22:49:07,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 214 transitions, 5378 flow [2021-10-13 22:49:07,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 214 transitions, 4786 flow, removed 203 selfloop flow, removed 19 redundant places. [2021-10-13 22:49:07,302 INFO L242 Difference]: Finished difference. Result has 239 places, 189 transitions, 3529 flow [2021-10-13 22:49:07,303 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2534, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3529, PETRI_PLACES=239, PETRI_TRANSITIONS=189} [2021-10-13 22:49:07,303 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 173 predicate places. [2021-10-13 22:49:07,303 INFO L470 AbstractCegarLoop]: Abstraction has has 239 places, 189 transitions, 3529 flow [2021-10-13 22:49:07,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.23076923076923) internal successors, (705), 13 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:07,303 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:07,303 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:49:07,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-10-13 22:49:07,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:07,519 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:07,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:07,520 INFO L82 PathProgramCache]: Analyzing trace with hash 919241940, now seen corresponding path program 16 times [2021-10-13 22:49:07,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:07,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077897498] [2021-10-13 22:49:07,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:07,520 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:07,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:07,601 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 22:49:07,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:07,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077897498] [2021-10-13 22:49:07,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077897498] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:07,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236035401] [2021-10-13 22:49:07,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:49:07,601 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:07,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:07,602 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) [2021-10-13 22:49:07,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-13 22:49:07,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:49:07,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:07,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:49:07,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:08,164 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 22:49:08,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236035401] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:08,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:08,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-10-13 22:49:08,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231707797] [2021-10-13 22:49:08,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 22:49:08,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:08,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 22:49:08,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-10-13 22:49:08,165 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:49:08,166 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 189 transitions, 3529 flow. Second operand has 14 states, 14 states have (on average 54.214285714285715) internal successors, (759), 14 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:08,166 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:08,166 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:49:08,166 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:08,523 INFO L129 PetriNetUnfolder]: 137/874 cut-off events. [2021-10-13 22:49:08,523 INFO L130 PetriNetUnfolder]: For 50461/50667 co-relation queries the response was YES. [2021-10-13 22:49:08,530 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5759 conditions, 874 events. 137/874 cut-off events. For 50461/50667 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 6041 event pairs, 0 based on Foata normal form. 79/866 useless extension candidates. Maximal degree in co-relation 5640. Up to 175 conditions per place. [2021-10-13 22:49:08,535 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 43 selfloop transitions, 128 changer transitions 11/226 dead transitions. [2021-10-13 22:49:08,535 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 226 transitions, 6115 flow [2021-10-13 22:49:08,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 22:49:08,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-13 22:49:08,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1337 transitions. [2021-10-13 22:49:08,536 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8440656565656566 [2021-10-13 22:49:08,536 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1337 transitions. [2021-10-13 22:49:08,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1337 transitions. [2021-10-13 22:49:08,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:08,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1337 transitions. [2021-10-13 22:49:08,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 55.708333333333336) internal successors, (1337), 24 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:08,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:08,539 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:08,539 INFO L186 Difference]: Start difference. First operand has 239 places, 189 transitions, 3529 flow. Second operand 24 states and 1337 transitions. [2021-10-13 22:49:08,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 226 transitions, 6115 flow [2021-10-13 22:49:08,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 226 transitions, 5289 flow, removed 371 selfloop flow, removed 18 redundant places. [2021-10-13 22:49:08,624 INFO L242 Difference]: Finished difference. Result has 249 places, 200 transitions, 3891 flow [2021-10-13 22:49:08,625 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3041, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3891, PETRI_PLACES=249, PETRI_TRANSITIONS=200} [2021-10-13 22:49:08,625 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 183 predicate places. [2021-10-13 22:49:08,625 INFO L470 AbstractCegarLoop]: Abstraction has has 249 places, 200 transitions, 3891 flow [2021-10-13 22:49:08,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 54.214285714285715) internal successors, (759), 14 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:08,625 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:08,625 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:49:08,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-13 22:49:08,846 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,SelfDestructingSolverStorable24 [2021-10-13 22:49:08,847 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:08,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:08,847 INFO L82 PathProgramCache]: Analyzing trace with hash 910431551, now seen corresponding path program 17 times [2021-10-13 22:49:08,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:08,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703172429] [2021-10-13 22:49:08,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:08,847 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:08,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:08,919 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:08,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:08,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703172429] [2021-10-13 22:49:08,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703172429] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:08,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020243196] [2021-10-13 22:49:08,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:49:08,920 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:08,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:08,920 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) [2021-10-13 22:49:08,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-13 22:49:09,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 22:49:09,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:09,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:49:09,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:09,507 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:09,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020243196] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:09,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:09,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-10-13 22:49:09,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753754132] [2021-10-13 22:49:09,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 22:49:09,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:09,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 22:49:09,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-10-13 22:49:09,508 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:49:09,509 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 200 transitions, 3891 flow. Second operand has 15 states, 15 states have (on average 54.13333333333333) internal successors, (812), 15 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:09,509 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:09,509 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:49:09,509 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:09,974 INFO L129 PetriNetUnfolder]: 163/1040 cut-off events. [2021-10-13 22:49:09,974 INFO L130 PetriNetUnfolder]: For 67194/67467 co-relation queries the response was YES. [2021-10-13 22:49:09,979 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7135 conditions, 1040 events. 163/1040 cut-off events. For 67194/67467 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 7514 event pairs, 0 based on Foata normal form. 83/1018 useless extension candidates. Maximal degree in co-relation 7013. Up to 203 conditions per place. [2021-10-13 22:49:09,985 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 73 selfloop transitions, 128 changer transitions 14/259 dead transitions. [2021-10-13 22:49:09,985 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 259 transitions, 7522 flow [2021-10-13 22:49:09,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 22:49:09,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-10-13 22:49:09,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1616 transitions. [2021-10-13 22:49:09,987 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8443051201671892 [2021-10-13 22:49:09,987 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1616 transitions. [2021-10-13 22:49:09,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1616 transitions. [2021-10-13 22:49:09,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:09,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1616 transitions. [2021-10-13 22:49:09,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 55.724137931034484) internal successors, (1616), 29 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:09,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:09,991 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:09,991 INFO L186 Difference]: Start difference. First operand has 249 places, 200 transitions, 3891 flow. Second operand 29 states and 1616 transitions. [2021-10-13 22:49:09,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 259 transitions, 7522 flow [2021-10-13 22:49:10,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 259 transitions, 6846 flow, removed 251 selfloop flow, removed 17 redundant places. [2021-10-13 22:49:10,071 INFO L242 Difference]: Finished difference. Result has 268 places, 227 transitions, 4950 flow [2021-10-13 22:49:10,071 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3374, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=4950, PETRI_PLACES=268, PETRI_TRANSITIONS=227} [2021-10-13 22:49:10,071 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 202 predicate places. [2021-10-13 22:49:10,072 INFO L470 AbstractCegarLoop]: Abstraction has has 268 places, 227 transitions, 4950 flow [2021-10-13 22:49:10,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 54.13333333333333) internal successors, (812), 15 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:10,072 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:10,072 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:49:10,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-13 22:49:10,287 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,SelfDestructingSolverStorable25 [2021-10-13 22:49:10,287 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:10,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:10,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1095888709, now seen corresponding path program 18 times [2021-10-13 22:49:10,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:10,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619928140] [2021-10-13 22:49:10,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:10,288 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:10,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:10,376 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:10,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:10,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619928140] [2021-10-13 22:49:10,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619928140] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:10,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479957709] [2021-10-13 22:49:10,377 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:49:10,377 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:10,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:10,378 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) [2021-10-13 22:49:10,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-13 22:49:10,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-13 22:49:10,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:10,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 22:49:10,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:11,002 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:11,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479957709] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:11,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:11,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-10-13 22:49:11,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928944644] [2021-10-13 22:49:11,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 22:49:11,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:11,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 22:49:11,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-10-13 22:49:11,004 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:49:11,004 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 227 transitions, 4950 flow. Second operand has 15 states, 15 states have (on average 54.13333333333333) internal successors, (812), 15 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:11,004 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:11,004 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:49:11,004 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:11,467 INFO L129 PetriNetUnfolder]: 165/1072 cut-off events. [2021-10-13 22:49:11,467 INFO L130 PetriNetUnfolder]: For 87169/87483 co-relation queries the response was YES. [2021-10-13 22:49:11,475 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7745 conditions, 1072 events. 165/1072 cut-off events. For 87169/87483 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 7741 event pairs, 0 based on Foata normal form. 92/1055 useless extension candidates. Maximal degree in co-relation 7614. Up to 203 conditions per place. [2021-10-13 22:49:11,482 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 57 selfloop transitions, 152 changer transitions 8/261 dead transitions. [2021-10-13 22:49:11,482 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 261 transitions, 7844 flow [2021-10-13 22:49:11,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 22:49:11,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-10-13 22:49:11,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1447 transitions. [2021-10-13 22:49:11,496 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8432400932400932 [2021-10-13 22:49:11,497 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1447 transitions. [2021-10-13 22:49:11,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1447 transitions. [2021-10-13 22:49:11,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:11,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1447 transitions. [2021-10-13 22:49:11,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 55.65384615384615) internal successors, (1447), 26 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:11,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 66.0) internal successors, (1782), 27 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:11,500 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 66.0) internal successors, (1782), 27 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:11,500 INFO L186 Difference]: Start difference. First operand has 268 places, 227 transitions, 4950 flow. Second operand 26 states and 1447 transitions. [2021-10-13 22:49:11,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 261 transitions, 7844 flow [2021-10-13 22:49:11,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 261 transitions, 6735 flow, removed 472 selfloop flow, removed 24 redundant places. [2021-10-13 22:49:11,613 INFO L242 Difference]: Finished difference. Result has 271 places, 233 transitions, 4899 flow [2021-10-13 22:49:11,613 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=4177, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4899, PETRI_PLACES=271, PETRI_TRANSITIONS=233} [2021-10-13 22:49:11,613 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 205 predicate places. [2021-10-13 22:49:11,613 INFO L470 AbstractCegarLoop]: Abstraction has has 271 places, 233 transitions, 4899 flow [2021-10-13 22:49:11,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 54.13333333333333) internal successors, (812), 15 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:11,614 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:11,614 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:49:11,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-13 22:49:11,814 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,SelfDestructingSolverStorable26 [2021-10-13 22:49:11,814 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:11,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:11,815 INFO L82 PathProgramCache]: Analyzing trace with hash 376688194, now seen corresponding path program 19 times [2021-10-13 22:49:11,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:11,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896431856] [2021-10-13 22:49:11,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:11,815 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:11,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:11,954 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:11,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:11,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896431856] [2021-10-13 22:49:11,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896431856] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:11,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105569682] [2021-10-13 22:49:11,955 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:49:11,955 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:11,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:11,956 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) [2021-10-13 22:49:11,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-13 22:49:12,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:12,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 22:49:12,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:12,676 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:12,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105569682] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:12,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:12,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-10-13 22:49:12,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704666052] [2021-10-13 22:49:12,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 22:49:12,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:12,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 22:49:12,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-10-13 22:49:12,677 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:49:12,678 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 233 transitions, 4899 flow. Second operand has 16 states, 16 states have (on average 54.125) internal successors, (866), 16 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:12,678 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:12,678 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:49:12,678 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:13,032 INFO L129 PetriNetUnfolder]: 177/1180 cut-off events. [2021-10-13 22:49:13,032 INFO L130 PetriNetUnfolder]: For 87101/87415 co-relation queries the response was YES. [2021-10-13 22:49:13,041 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8054 conditions, 1180 events. 177/1180 cut-off events. For 87101/87415 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 8670 event pairs, 0 based on Foata normal form. 40/1095 useless extension candidates. Maximal degree in co-relation 7924. Up to 241 conditions per place. [2021-10-13 22:49:13,047 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 174 selfloop transitions, 45 changer transitions 8/271 dead transitions. [2021-10-13 22:49:13,047 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 271 transitions, 7497 flow [2021-10-13 22:49:13,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-13 22:49:13,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-13 22:49:13,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1056 transitions. [2021-10-13 22:49:13,049 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8421052631578947 [2021-10-13 22:49:13,049 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1056 transitions. [2021-10-13 22:49:13,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1056 transitions. [2021-10-13 22:49:13,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:13,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1056 transitions. [2021-10-13 22:49:13,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 55.578947368421055) internal successors, (1056), 19 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:13,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 66.0) internal successors, (1320), 20 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:13,051 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 66.0) internal successors, (1320), 20 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:13,051 INFO L186 Difference]: Start difference. First operand has 271 places, 233 transitions, 4899 flow. Second operand 19 states and 1056 transitions. [2021-10-13 22:49:13,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 271 transitions, 7497 flow [2021-10-13 22:49:13,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 271 transitions, 7004 flow, removed 129 selfloop flow, removed 20 redundant places. [2021-10-13 22:49:13,165 INFO L242 Difference]: Finished difference. Result has 273 places, 245 transitions, 5143 flow [2021-10-13 22:49:13,166 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=4508, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5143, PETRI_PLACES=273, PETRI_TRANSITIONS=245} [2021-10-13 22:49:13,166 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 207 predicate places. [2021-10-13 22:49:13,166 INFO L470 AbstractCegarLoop]: Abstraction has has 273 places, 245 transitions, 5143 flow [2021-10-13 22:49:13,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.125) internal successors, (866), 16 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:13,167 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:13,167 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:49:13,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-13 22:49:13,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:13,384 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:13,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:13,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1852018496, now seen corresponding path program 20 times [2021-10-13 22:49:13,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:13,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273192711] [2021-10-13 22:49:13,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:13,385 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:13,511 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:13,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:13,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273192711] [2021-10-13 22:49:13,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273192711] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:13,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675530895] [2021-10-13 22:49:13,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:49:13,512 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:13,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:13,513 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) [2021-10-13 22:49:13,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-13 22:49:13,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:49:13,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:13,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 22:49:13,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:14,239 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:14,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675530895] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:14,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:14,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-10-13 22:49:14,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004892189] [2021-10-13 22:49:14,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 22:49:14,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:14,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 22:49:14,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-10-13 22:49:14,241 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:49:14,241 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 245 transitions, 5143 flow. Second operand has 16 states, 16 states have (on average 54.125) internal successors, (866), 16 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:14,241 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:14,241 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:49:14,241 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:14,605 INFO L129 PetriNetUnfolder]: 189/1295 cut-off events. [2021-10-13 22:49:14,605 INFO L130 PetriNetUnfolder]: For 97263/97560 co-relation queries the response was YES. [2021-10-13 22:49:14,614 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8759 conditions, 1295 events. 189/1295 cut-off events. For 97263/97560 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 9783 event pairs, 0 based on Foata normal form. 59/1216 useless extension candidates. Maximal degree in co-relation 8624. Up to 223 conditions per place. [2021-10-13 22:49:14,625 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 127 selfloop transitions, 105 changer transitions 8/284 dead transitions. [2021-10-13 22:49:14,625 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 284 transitions, 7924 flow [2021-10-13 22:49:14,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 22:49:14,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-13 22:49:14,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1221 transitions. [2021-10-13 22:49:14,627 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8409090909090909 [2021-10-13 22:49:14,627 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1221 transitions. [2021-10-13 22:49:14,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1221 transitions. [2021-10-13 22:49:14,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:14,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1221 transitions. [2021-10-13 22:49:14,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 55.5) internal successors, (1221), 22 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:14,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 66.0) internal successors, (1518), 23 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:14,629 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 66.0) internal successors, (1518), 23 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:14,629 INFO L186 Difference]: Start difference. First operand has 273 places, 245 transitions, 5143 flow. Second operand 22 states and 1221 transitions. [2021-10-13 22:49:14,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 284 transitions, 7924 flow [2021-10-13 22:49:14,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 284 transitions, 7699 flow, removed 80 selfloop flow, removed 14 redundant places. [2021-10-13 22:49:14,756 INFO L242 Difference]: Finished difference. Result has 284 places, 257 transitions, 5795 flow [2021-10-13 22:49:14,757 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=4990, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5795, PETRI_PLACES=284, PETRI_TRANSITIONS=257} [2021-10-13 22:49:14,757 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 218 predicate places. [2021-10-13 22:49:14,757 INFO L470 AbstractCegarLoop]: Abstraction has has 284 places, 257 transitions, 5795 flow [2021-10-13 22:49:14,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.125) internal successors, (866), 16 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:14,757 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:14,757 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:49:14,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-13 22:49:14,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-13 22:49:14,975 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:14,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:14,975 INFO L82 PathProgramCache]: Analyzing trace with hash 730835202, now seen corresponding path program 21 times [2021-10-13 22:49:14,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:14,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813131106] [2021-10-13 22:49:14,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:14,975 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:14,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:15,070 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:15,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:15,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813131106] [2021-10-13 22:49:15,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813131106] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:15,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750673035] [2021-10-13 22:49:15,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:49:15,071 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:15,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:15,071 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) [2021-10-13 22:49:15,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-13 22:49:15,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-13 22:49:15,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:15,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 22:49:15,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:15,834 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:15,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750673035] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:15,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:15,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-10-13 22:49:15,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409136832] [2021-10-13 22:49:15,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 22:49:15,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:15,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 22:49:15,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-10-13 22:49:15,836 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:49:15,836 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 257 transitions, 5795 flow. Second operand has 16 states, 16 states have (on average 54.125) internal successors, (866), 16 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:15,836 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:15,836 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:49:15,836 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:16,296 INFO L129 PetriNetUnfolder]: 201/1354 cut-off events. [2021-10-13 22:49:16,296 INFO L130 PetriNetUnfolder]: For 108884/109263 co-relation queries the response was YES. [2021-10-13 22:49:16,311 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9598 conditions, 1354 events. 201/1354 cut-off events. For 108884/109263 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 10397 event pairs, 0 based on Foata normal form. 103/1316 useless extension candidates. Maximal degree in co-relation 9459. Up to 241 conditions per place. [2021-10-13 22:49:16,318 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 69 selfloop transitions, 181 changer transitions 8/302 dead transitions. [2021-10-13 22:49:16,319 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 302 transitions, 9067 flow [2021-10-13 22:49:16,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 22:49:16,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-10-13 22:49:16,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1445 transitions. [2021-10-13 22:49:16,321 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8420745920745921 [2021-10-13 22:49:16,321 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1445 transitions. [2021-10-13 22:49:16,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1445 transitions. [2021-10-13 22:49:16,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:16,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1445 transitions. [2021-10-13 22:49:16,323 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) [2021-10-13 22:49:16,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 66.0) internal successors, (1782), 27 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:16,325 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 66.0) internal successors, (1782), 27 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:16,325 INFO L186 Difference]: Start difference. First operand has 284 places, 257 transitions, 5795 flow. Second operand 26 states and 1445 transitions. [2021-10-13 22:49:16,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 302 transitions, 9067 flow [2021-10-13 22:49:16,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 302 transitions, 8660 flow, removed 125 selfloop flow, removed 17 redundant places. [2021-10-13 22:49:16,468 INFO L242 Difference]: Finished difference. Result has 296 places, 272 transitions, 6592 flow [2021-10-13 22:49:16,468 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=5528, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=6592, PETRI_PLACES=296, PETRI_TRANSITIONS=272} [2021-10-13 22:49:16,469 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 230 predicate places. [2021-10-13 22:49:16,469 INFO L470 AbstractCegarLoop]: Abstraction has has 296 places, 272 transitions, 6592 flow [2021-10-13 22:49:16,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.125) internal successors, (866), 16 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:16,469 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:16,469 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:49:16,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-13 22:49:16,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:16,684 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:16,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:16,684 INFO L82 PathProgramCache]: Analyzing trace with hash 240526272, now seen corresponding path program 22 times [2021-10-13 22:49:16,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:16,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280256547] [2021-10-13 22:49:16,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:16,684 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:16,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:16,775 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:16,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:16,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280256547] [2021-10-13 22:49:16,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280256547] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:16,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307912551] [2021-10-13 22:49:16,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:49:16,776 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:16,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:16,776 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) [2021-10-13 22:49:16,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-13 22:49:17,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:49:17,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:17,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 22:49:17,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:17,444 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:17,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307912551] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:17,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:17,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-10-13 22:49:17,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943699342] [2021-10-13 22:49:17,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 22:49:17,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:17,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 22:49:17,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-10-13 22:49:17,446 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:49:17,446 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 272 transitions, 6592 flow. Second operand has 16 states, 16 states have (on average 54.125) internal successors, (866), 16 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:17,447 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:17,447 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:49:17,447 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:17,980 INFO L129 PetriNetUnfolder]: 207/1385 cut-off events. [2021-10-13 22:49:17,980 INFO L130 PetriNetUnfolder]: For 117268/117688 co-relation queries the response was YES. [2021-10-13 22:49:17,992 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10109 conditions, 1385 events. 207/1385 cut-off events. For 117268/117688 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 10693 event pairs, 0 based on Foata normal form. 126/1369 useless extension candidates. Maximal degree in co-relation 9966. Up to 249 conditions per place. [2021-10-13 22:49:17,999 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 60 selfloop transitions, 198 changer transitions 8/310 dead transitions. [2021-10-13 22:49:17,999 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 310 transitions, 9872 flow [2021-10-13 22:49:17,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 22:49:17,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-10-13 22:49:18,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1669 transitions. [2021-10-13 22:49:18,000 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.842929292929293 [2021-10-13 22:49:18,001 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1669 transitions. [2021-10-13 22:49:18,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1669 transitions. [2021-10-13 22:49:18,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:18,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1669 transitions. [2021-10-13 22:49:18,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 55.63333333333333) internal successors, (1669), 30 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:18,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:18,004 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:18,004 INFO L186 Difference]: Start difference. First operand has 296 places, 272 transitions, 6592 flow. Second operand 30 states and 1669 transitions. [2021-10-13 22:49:18,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 310 transitions, 9872 flow [2021-10-13 22:49:18,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 310 transitions, 9239 flow, removed 171 selfloop flow, removed 20 redundant places. [2021-10-13 22:49:18,192 INFO L242 Difference]: Finished difference. Result has 309 places, 278 transitions, 6898 flow [2021-10-13 22:49:18,192 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=6061, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=6898, PETRI_PLACES=309, PETRI_TRANSITIONS=278} [2021-10-13 22:49:18,192 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 243 predicate places. [2021-10-13 22:49:18,192 INFO L470 AbstractCegarLoop]: Abstraction has has 309 places, 278 transitions, 6898 flow [2021-10-13 22:49:18,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.125) internal successors, (866), 16 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:18,193 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:18,193 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:49:18,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-13 22:49:18,407 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,SelfDestructingSolverStorable30 [2021-10-13 22:49:18,407 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:18,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:18,408 INFO L82 PathProgramCache]: Analyzing trace with hash 2103475369, now seen corresponding path program 23 times [2021-10-13 22:49:18,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:18,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772622725] [2021-10-13 22:49:18,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:18,408 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:18,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:18,561 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:18,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:18,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772622725] [2021-10-13 22:49:18,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772622725] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:18,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067444700] [2021-10-13 22:49:18,561 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:49:18,561 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:18,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:18,563 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) [2021-10-13 22:49:18,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-13 22:49:19,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-10-13 22:49:19,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:19,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 22:49:19,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:19,463 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:19,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067444700] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:19,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:19,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-10-13 22:49:19,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793894072] [2021-10-13 22:49:19,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 22:49:19,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:19,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 22:49:19,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-10-13 22:49:19,465 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:49:19,465 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 278 transitions, 6898 flow. Second operand has 17 states, 17 states have (on average 54.11764705882353) internal successors, (920), 17 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:19,466 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:19,466 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:49:19,466 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:19,864 INFO L129 PetriNetUnfolder]: 211/1435 cut-off events. [2021-10-13 22:49:19,864 INFO L130 PetriNetUnfolder]: For 124711/125095 co-relation queries the response was YES. [2021-10-13 22:49:19,875 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10560 conditions, 1435 events. 211/1435 cut-off events. For 124711/125095 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 11093 event pairs, 0 based on Foata normal form. 55/1337 useless extension candidates. Maximal degree in co-relation 10413. Up to 342 conditions per place. [2021-10-13 22:49:19,882 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 228 selfloop transitions, 25 changer transitions 8/305 dead transitions. [2021-10-13 22:49:19,883 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 305 transitions, 9432 flow [2021-10-13 22:49:19,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-13 22:49:19,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-13 22:49:19,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1055 transitions. [2021-10-13 22:49:19,885 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8413078149920256 [2021-10-13 22:49:19,885 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1055 transitions. [2021-10-13 22:49:19,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1055 transitions. [2021-10-13 22:49:19,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:19,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1055 transitions. [2021-10-13 22:49:19,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 55.526315789473685) internal successors, (1055), 19 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:19,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 66.0) internal successors, (1320), 20 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:19,887 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 66.0) internal successors, (1320), 20 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:19,887 INFO L186 Difference]: Start difference. First operand has 309 places, 278 transitions, 6898 flow. Second operand 19 states and 1055 transitions. [2021-10-13 22:49:19,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 305 transitions, 9432 flow [2021-10-13 22:49:20,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 305 transitions, 8803 flow, removed 137 selfloop flow, removed 25 redundant places. [2021-10-13 22:49:20,081 INFO L242 Difference]: Finished difference. Result has 306 places, 282 transitions, 6685 flow [2021-10-13 22:49:20,081 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=6337, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6685, PETRI_PLACES=306, PETRI_TRANSITIONS=282} [2021-10-13 22:49:20,081 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 240 predicate places. [2021-10-13 22:49:20,081 INFO L470 AbstractCegarLoop]: Abstraction has has 306 places, 282 transitions, 6685 flow [2021-10-13 22:49:20,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 54.11764705882353) internal successors, (920), 17 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:20,082 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:20,082 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:49:20,099 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-10-13 22:49:20,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:20,282 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:20,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:20,283 INFO L82 PathProgramCache]: Analyzing trace with hash -842379433, now seen corresponding path program 24 times [2021-10-13 22:49:20,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:20,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092769097] [2021-10-13 22:49:20,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:20,283 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:20,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:20,418 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:20,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:20,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092769097] [2021-10-13 22:49:20,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092769097] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:20,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340025751] [2021-10-13 22:49:20,418 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:49:20,419 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:20,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:20,419 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) [2021-10-13 22:49:20,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-13 22:49:21,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-10-13 22:49:21,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:21,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 22:49:21,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:21,341 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:21,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340025751] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:21,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:21,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-10-13 22:49:21,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117774547] [2021-10-13 22:49:21,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 22:49:21,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:21,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 22:49:21,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-10-13 22:49:21,343 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:49:21,343 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 282 transitions, 6685 flow. Second operand has 18 states, 18 states have (on average 54.166666666666664) internal successors, (975), 18 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:21,343 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:21,343 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:49:21,343 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:21,875 INFO L129 PetriNetUnfolder]: 221/1532 cut-off events. [2021-10-13 22:49:21,876 INFO L130 PetriNetUnfolder]: For 134274/134632 co-relation queries the response was YES. [2021-10-13 22:49:21,886 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11111 conditions, 1532 events. 221/1532 cut-off events. For 134274/134632 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 12037 event pairs, 0 based on Foata normal form. 58/1426 useless extension candidates. Maximal degree in co-relation 10961. Up to 326 conditions per place. [2021-10-13 22:49:21,894 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 219 selfloop transitions, 45 changer transitions 8/316 dead transitions. [2021-10-13 22:49:21,894 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 316 transitions, 9589 flow [2021-10-13 22:49:21,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 22:49:21,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-13 22:49:21,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1222 transitions. [2021-10-13 22:49:21,896 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8415977961432507 [2021-10-13 22:49:21,896 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1222 transitions. [2021-10-13 22:49:21,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1222 transitions. [2021-10-13 22:49:21,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:21,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1222 transitions. [2021-10-13 22:49:21,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 55.54545454545455) internal successors, (1222), 22 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:21,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 66.0) internal successors, (1518), 23 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:21,898 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 66.0) internal successors, (1518), 23 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:21,898 INFO L186 Difference]: Start difference. First operand has 306 places, 282 transitions, 6685 flow. Second operand 22 states and 1222 transitions. [2021-10-13 22:49:21,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 316 transitions, 9589 flow [2021-10-13 22:49:22,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 316 transitions, 9361 flow, removed 99 selfloop flow, removed 12 redundant places. [2021-10-13 22:49:22,074 INFO L242 Difference]: Finished difference. Result has 321 places, 292 transitions, 7228 flow [2021-10-13 22:49:22,074 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=6553, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=7228, PETRI_PLACES=321, PETRI_TRANSITIONS=292} [2021-10-13 22:49:22,074 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 255 predicate places. [2021-10-13 22:49:22,074 INFO L470 AbstractCegarLoop]: Abstraction has has 321 places, 292 transitions, 7228 flow [2021-10-13 22:49:22,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.166666666666664) internal successors, (975), 18 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:22,075 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:22,075 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:49:22,094 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-10-13 22:49:22,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:22,287 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:22,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:22,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1538380707, now seen corresponding path program 25 times [2021-10-13 22:49:22,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:22,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023379815] [2021-10-13 22:49:22,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:22,288 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:22,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:22,412 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:22,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:22,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023379815] [2021-10-13 22:49:22,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023379815] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:22,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238775404] [2021-10-13 22:49:22,412 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:49:22,412 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:22,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:22,413 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) [2021-10-13 22:49:22,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-13 22:49:23,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:23,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 22:49:23,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:23,332 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:23,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238775404] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:23,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:23,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-10-13 22:49:23,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019932698] [2021-10-13 22:49:23,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 22:49:23,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:23,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 22:49:23,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-10-13 22:49:23,333 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:49:23,333 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 292 transitions, 7228 flow. Second operand has 17 states, 17 states have (on average 54.11764705882353) internal successors, (920), 17 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:23,334 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:23,334 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:49:23,334 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:23,783 INFO L129 PetriNetUnfolder]: 225/1568 cut-off events. [2021-10-13 22:49:23,783 INFO L130 PetriNetUnfolder]: For 138692/139050 co-relation queries the response was YES. [2021-10-13 22:49:23,793 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11470 conditions, 1568 events. 225/1568 cut-off events. For 138692/139050 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 12311 event pairs, 0 based on Foata normal form. 61/1461 useless extension candidates. Maximal degree in co-relation 11314. Up to 302 conditions per place. [2021-10-13 22:49:23,800 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 207 selfloop transitions, 62 changer transitions 8/321 dead transitions. [2021-10-13 22:49:23,800 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 321 transitions, 9988 flow [2021-10-13 22:49:23,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 22:49:23,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-10-13 22:49:23,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1278 transitions. [2021-10-13 22:49:23,802 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.841897233201581 [2021-10-13 22:49:23,802 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1278 transitions. [2021-10-13 22:49:23,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1278 transitions. [2021-10-13 22:49:23,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:23,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1278 transitions. [2021-10-13 22:49:23,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 55.56521739130435) internal successors, (1278), 23 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:23,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 66.0) internal successors, (1584), 24 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:23,804 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 66.0) internal successors, (1584), 24 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:23,804 INFO L186 Difference]: Start difference. First operand has 321 places, 292 transitions, 7228 flow. Second operand 23 states and 1278 transitions. [2021-10-13 22:49:23,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 321 transitions, 9988 flow [2021-10-13 22:49:23,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 321 transitions, 9740 flow, removed 99 selfloop flow, removed 15 redundant places. [2021-10-13 22:49:24,000 INFO L242 Difference]: Finished difference. Result has 332 places, 296 transitions, 7530 flow [2021-10-13 22:49:24,001 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=7080, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=7530, PETRI_PLACES=332, PETRI_TRANSITIONS=296} [2021-10-13 22:49:24,001 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 266 predicate places. [2021-10-13 22:49:24,001 INFO L470 AbstractCegarLoop]: Abstraction has has 332 places, 296 transitions, 7530 flow [2021-10-13 22:49:24,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 54.11764705882353) internal successors, (920), 17 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:24,001 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:24,001 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:49:24,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-13 22:49:24,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:24,202 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:24,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:24,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1926233347, now seen corresponding path program 26 times [2021-10-13 22:49:24,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:24,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992008174] [2021-10-13 22:49:24,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:24,202 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:24,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:24,322 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:24,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:24,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992008174] [2021-10-13 22:49:24,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992008174] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:24,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007630080] [2021-10-13 22:49:24,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:49:24,323 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:24,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:24,324 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) [2021-10-13 22:49:24,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-13 22:49:25,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:49:25,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:25,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 22:49:25,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:25,260 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:25,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007630080] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:25,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:25,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-10-13 22:49:25,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966504230] [2021-10-13 22:49:25,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 22:49:25,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:25,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 22:49:25,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-10-13 22:49:25,262 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:49:25,263 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 296 transitions, 7530 flow. Second operand has 17 states, 17 states have (on average 54.11764705882353) internal successors, (920), 17 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:25,263 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:25,263 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:49:25,263 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:25,844 INFO L129 PetriNetUnfolder]: 235/1658 cut-off events. [2021-10-13 22:49:25,845 INFO L130 PetriNetUnfolder]: For 145960/146318 co-relation queries the response was YES. [2021-10-13 22:49:25,857 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12163 conditions, 1658 events. 235/1658 cut-off events. For 145960/146318 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 13288 event pairs, 0 based on Foata normal form. 72/1552 useless extension candidates. Maximal degree in co-relation 12003. Up to 293 conditions per place. [2021-10-13 22:49:25,865 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 173 selfloop transitions, 111 changer transitions 8/336 dead transitions. [2021-10-13 22:49:25,866 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 336 transitions, 10731 flow [2021-10-13 22:49:25,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 22:49:25,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-10-13 22:49:25,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1443 transitions. [2021-10-13 22:49:25,867 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8409090909090909 [2021-10-13 22:49:25,867 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1443 transitions. [2021-10-13 22:49:25,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1443 transitions. [2021-10-13 22:49:25,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:25,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1443 transitions. [2021-10-13 22:49:25,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 55.5) internal successors, (1443), 26 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:25,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 66.0) internal successors, (1782), 27 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:25,870 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 66.0) internal successors, (1782), 27 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:25,870 INFO L186 Difference]: Start difference. First operand has 332 places, 296 transitions, 7530 flow. Second operand 26 states and 1443 transitions. [2021-10-13 22:49:25,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 336 transitions, 10731 flow [2021-10-13 22:49:26,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 336 transitions, 10457 flow, removed 105 selfloop flow, removed 16 redundant places. [2021-10-13 22:49:26,149 INFO L242 Difference]: Finished difference. Result has 347 places, 306 transitions, 8207 flow [2021-10-13 22:49:26,150 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=7364, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=8207, PETRI_PLACES=347, PETRI_TRANSITIONS=306} [2021-10-13 22:49:26,150 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 281 predicate places. [2021-10-13 22:49:26,150 INFO L470 AbstractCegarLoop]: Abstraction has has 347 places, 306 transitions, 8207 flow [2021-10-13 22:49:26,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 54.11764705882353) internal successors, (920), 17 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:26,150 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:26,150 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:49:26,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-10-13 22:49:26,350 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,SelfDestructingSolverStorable34 [2021-10-13 22:49:26,351 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:26,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:26,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1607040931, now seen corresponding path program 27 times [2021-10-13 22:49:26,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:26,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761468352] [2021-10-13 22:49:26,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:26,351 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:26,490 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:26,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:26,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761468352] [2021-10-13 22:49:26,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761468352] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:26,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215319105] [2021-10-13 22:49:26,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:49:26,491 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:26,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:26,492 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) [2021-10-13 22:49:26,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-13 22:49:27,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-10-13 22:49:27,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:27,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 22:49:27,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:27,431 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:27,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215319105] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:27,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:27,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-10-13 22:49:27,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766506458] [2021-10-13 22:49:27,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 22:49:27,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:27,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 22:49:27,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-10-13 22:49:27,433 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:49:27,433 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 306 transitions, 8207 flow. Second operand has 17 states, 17 states have (on average 54.11764705882353) internal successors, (920), 17 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:27,433 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:27,433 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:49:27,433 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:27,955 INFO L129 PetriNetUnfolder]: 239/1687 cut-off events. [2021-10-13 22:49:27,955 INFO L130 PetriNetUnfolder]: For 150422/150808 co-relation queries the response was YES. [2021-10-13 22:49:27,970 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12593 conditions, 1687 events. 239/1687 cut-off events. For 150422/150808 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 13628 event pairs, 0 based on Foata normal form. 103/1610 useless extension candidates. Maximal degree in co-relation 12426. Up to 301 conditions per place. [2021-10-13 22:49:27,979 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 117 selfloop transitions, 172 changer transitions 8/341 dead transitions. [2021-10-13 22:49:27,979 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 341 transitions, 11352 flow [2021-10-13 22:49:27,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 22:49:27,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-13 22:49:27,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1555 transitions. [2021-10-13 22:49:27,980 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8414502164502164 [2021-10-13 22:49:27,980 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1555 transitions. [2021-10-13 22:49:27,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1555 transitions. [2021-10-13 22:49:27,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:27,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1555 transitions. [2021-10-13 22:49:27,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 55.535714285714285) internal successors, (1555), 28 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:27,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 66.0) internal successors, (1914), 29 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:27,983 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 66.0) internal successors, (1914), 29 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:27,983 INFO L186 Difference]: Start difference. First operand has 347 places, 306 transitions, 8207 flow. Second operand 28 states and 1555 transitions. [2021-10-13 22:49:27,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 341 transitions, 11352 flow [2021-10-13 22:49:28,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 341 transitions, 11030 flow, removed 111 selfloop flow, removed 18 redundant places. [2021-10-13 22:49:28,339 INFO L242 Difference]: Finished difference. Result has 361 places, 311 transitions, 8756 flow [2021-10-13 22:49:28,339 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=8001, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=8756, PETRI_PLACES=361, PETRI_TRANSITIONS=311} [2021-10-13 22:49:28,339 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 295 predicate places. [2021-10-13 22:49:28,339 INFO L470 AbstractCegarLoop]: Abstraction has has 361 places, 311 transitions, 8756 flow [2021-10-13 22:49:28,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 54.11764705882353) internal successors, (920), 17 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:28,340 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:28,340 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:49:28,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-10-13 22:49:28,540 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,SelfDestructingSolverStorable35 [2021-10-13 22:49:28,540 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:28,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:28,541 INFO L82 PathProgramCache]: Analyzing trace with hash 583817531, now seen corresponding path program 28 times [2021-10-13 22:49:28,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:28,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116619216] [2021-10-13 22:49:28,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:28,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:28,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:28,664 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:28,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:28,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116619216] [2021-10-13 22:49:28,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116619216] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:28,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925686016] [2021-10-13 22:49:28,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:49:28,665 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:28,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:28,665 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) [2021-10-13 22:49:28,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-13 22:49:29,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:49:29,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:29,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 22:49:29,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:29,637 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:29,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925686016] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:29,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:29,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-10-13 22:49:29,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015620291] [2021-10-13 22:49:29,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 22:49:29,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:29,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 22:49:29,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-10-13 22:49:29,639 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:49:29,640 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 311 transitions, 8756 flow. Second operand has 18 states, 18 states have (on average 54.166666666666664) internal successors, (975), 18 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:29,640 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:29,640 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:49:29,640 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:30,311 INFO L129 PetriNetUnfolder]: 250/1793 cut-off events. [2021-10-13 22:49:30,311 INFO L130 PetriNetUnfolder]: For 159823/160183 co-relation queries the response was YES. [2021-10-13 22:49:30,329 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13481 conditions, 1793 events. 250/1793 cut-off events. For 159823/160183 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 14735 event pairs, 0 based on Foata normal form. 107/1709 useless extension candidates. Maximal degree in co-relation 13309. Up to 319 conditions per place. [2021-10-13 22:49:30,338 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 108 selfloop transitions, 194 changer transitions 8/354 dead transitions. [2021-10-13 22:49:30,338 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 354 transitions, 12327 flow [2021-10-13 22:49:30,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 22:49:30,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-10-13 22:49:30,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1611 transitions. [2021-10-13 22:49:30,340 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.841692789968652 [2021-10-13 22:49:30,340 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1611 transitions. [2021-10-13 22:49:30,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1611 transitions. [2021-10-13 22:49:30,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:30,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1611 transitions. [2021-10-13 22:49:30,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 55.55172413793103) internal successors, (1611), 29 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:30,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:30,343 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:30,343 INFO L186 Difference]: Start difference. First operand has 361 places, 311 transitions, 8756 flow. Second operand 29 states and 1611 transitions. [2021-10-13 22:49:30,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 354 transitions, 12327 flow [2021-10-13 22:49:30,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 354 transitions, 11888 flow, removed 121 selfloop flow, removed 21 redundant places. [2021-10-13 22:49:30,664 INFO L242 Difference]: Finished difference. Result has 373 places, 324 transitions, 9604 flow [2021-10-13 22:49:30,665 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=8441, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=9604, PETRI_PLACES=373, PETRI_TRANSITIONS=324} [2021-10-13 22:49:30,665 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 307 predicate places. [2021-10-13 22:49:30,665 INFO L470 AbstractCegarLoop]: Abstraction has has 373 places, 324 transitions, 9604 flow [2021-10-13 22:49:30,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.166666666666664) internal successors, (975), 18 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:30,665 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:30,665 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:49:30,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-10-13 22:49:30,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:30,866 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:30,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:30,866 INFO L82 PathProgramCache]: Analyzing trace with hash -2070318423, now seen corresponding path program 29 times [2021-10-13 22:49:30,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:30,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097513840] [2021-10-13 22:49:30,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:30,866 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:30,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:30,977 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:30,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:30,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097513840] [2021-10-13 22:49:30,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097513840] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:30,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106013768] [2021-10-13 22:49:30,977 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:49:30,977 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:30,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:30,978 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) [2021-10-13 22:49:30,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-13 22:49:31,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-10-13 22:49:31,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:31,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 22:49:31,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:31,965 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:31,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106013768] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:31,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:31,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-10-13 22:49:31,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483476420] [2021-10-13 22:49:31,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 22:49:31,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:31,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 22:49:31,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-10-13 22:49:31,967 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:49:31,967 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 324 transitions, 9604 flow. Second operand has 17 states, 17 states have (on average 54.11764705882353) internal successors, (920), 17 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:31,967 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:31,967 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:49:31,967 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:32,608 INFO L129 PetriNetUnfolder]: 263/1881 cut-off events. [2021-10-13 22:49:32,608 INFO L130 PetriNetUnfolder]: For 176182/176599 co-relation queries the response was YES. [2021-10-13 22:49:32,685 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14538 conditions, 1881 events. 263/1881 cut-off events. For 176182/176599 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 15789 event pairs, 0 based on Foata normal form. 124/1805 useless extension candidates. Maximal degree in co-relation 14361. Up to 339 conditions per place. [2021-10-13 22:49:32,697 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 95 selfloop transitions, 222 changer transitions 8/369 dead transitions. [2021-10-13 22:49:32,697 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 369 transitions, 13410 flow [2021-10-13 22:49:32,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 22:49:32,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-10-13 22:49:32,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1667 transitions. [2021-10-13 22:49:32,699 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.841919191919192 [2021-10-13 22:49:32,699 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1667 transitions. [2021-10-13 22:49:32,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1667 transitions. [2021-10-13 22:49:32,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:32,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1667 transitions. [2021-10-13 22:49:32,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 55.56666666666667) internal successors, (1667), 30 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:32,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:32,702 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:32,702 INFO L186 Difference]: Start difference. First operand has 373 places, 324 transitions, 9604 flow. Second operand 30 states and 1667 transitions. [2021-10-13 22:49:32,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 369 transitions, 13410 flow [2021-10-13 22:49:33,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 369 transitions, 12854 flow, removed 154 selfloop flow, removed 23 redundant places. [2021-10-13 22:49:33,011 INFO L242 Difference]: Finished difference. Result has 384 places, 339 transitions, 10458 flow [2021-10-13 22:49:33,011 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=9144, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=10458, PETRI_PLACES=384, PETRI_TRANSITIONS=339} [2021-10-13 22:49:33,011 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 318 predicate places. [2021-10-13 22:49:33,011 INFO L470 AbstractCegarLoop]: Abstraction has has 384 places, 339 transitions, 10458 flow [2021-10-13 22:49:33,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 54.11764705882353) internal successors, (920), 17 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:33,012 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:33,012 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:49:33,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-10-13 22:49:33,212 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,SelfDestructingSolverStorable37 [2021-10-13 22:49:33,212 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:33,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:33,213 INFO L82 PathProgramCache]: Analyzing trace with hash -356060751, now seen corresponding path program 30 times [2021-10-13 22:49:33,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:33,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089911624] [2021-10-13 22:49:33,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:33,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:33,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:33,325 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:33,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:33,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089911624] [2021-10-13 22:49:33,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089911624] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:33,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414823258] [2021-10-13 22:49:33,326 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:49:33,326 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:33,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:33,327 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) [2021-10-13 22:49:33,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-13 22:49:34,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-13 22:49:34,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:34,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 22:49:34,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:34,335 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:34,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414823258] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:34,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:34,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-10-13 22:49:34,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278574144] [2021-10-13 22:49:34,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 22:49:34,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:34,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 22:49:34,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-10-13 22:49:34,336 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:49:34,336 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 339 transitions, 10458 flow. Second operand has 18 states, 18 states have (on average 54.166666666666664) internal successors, (975), 18 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:34,337 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:34,337 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:49:34,337 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:35,091 INFO L129 PetriNetUnfolder]: 274/1972 cut-off events. [2021-10-13 22:49:35,091 INFO L130 PetriNetUnfolder]: For 194731/195166 co-relation queries the response was YES. [2021-10-13 22:49:35,111 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15561 conditions, 1972 events. 274/1972 cut-off events. For 194731/195166 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 16874 event pairs, 0 based on Foata normal form. 137/1901 useless extension candidates. Maximal degree in co-relation 15379. Up to 355 conditions per place. [2021-10-13 22:49:35,121 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 89 selfloop transitions, 241 changer transitions 8/382 dead transitions. [2021-10-13 22:49:35,121 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 382 transitions, 14365 flow [2021-10-13 22:49:35,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-13 22:49:35,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-13 22:49:35,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1723 transitions. [2021-10-13 22:49:35,123 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8421309872922776 [2021-10-13 22:49:35,123 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1723 transitions. [2021-10-13 22:49:35,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1723 transitions. [2021-10-13 22:49:35,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:35,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1723 transitions. [2021-10-13 22:49:35,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 55.58064516129032) internal successors, (1723), 31 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:35,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 66.0) internal successors, (2112), 32 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:35,126 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 66.0) internal successors, (2112), 32 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:35,126 INFO L186 Difference]: Start difference. First operand has 384 places, 339 transitions, 10458 flow. Second operand 31 states and 1723 transitions. [2021-10-13 22:49:35,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 382 transitions, 14365 flow [2021-10-13 22:49:35,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 382 transitions, 13742 flow, removed 196 selfloop flow, removed 22 redundant places. [2021-10-13 22:49:35,528 INFO L242 Difference]: Finished difference. Result has 396 places, 351 transitions, 11211 flow [2021-10-13 22:49:35,528 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=9977, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=11211, PETRI_PLACES=396, PETRI_TRANSITIONS=351} [2021-10-13 22:49:35,528 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 330 predicate places. [2021-10-13 22:49:35,528 INFO L470 AbstractCegarLoop]: Abstraction has has 396 places, 351 transitions, 11211 flow [2021-10-13 22:49:35,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.166666666666664) internal successors, (975), 18 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:35,528 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:35,529 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:49:35,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-13 22:49:35,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-13 22:49:35,747 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:35,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:35,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1722513397, now seen corresponding path program 31 times [2021-10-13 22:49:35,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:35,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317656932] [2021-10-13 22:49:35,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:35,748 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:35,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:35,854 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:35,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:35,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317656932] [2021-10-13 22:49:35,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317656932] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:35,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692315587] [2021-10-13 22:49:35,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:49:35,855 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:35,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:35,856 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) [2021-10-13 22:49:35,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-13 22:49:36,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:36,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 22:49:36,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:36,934 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:36,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692315587] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:36,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:36,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-10-13 22:49:36,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408562156] [2021-10-13 22:49:36,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 22:49:36,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:36,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 22:49:36,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-10-13 22:49:36,936 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:49:36,936 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 351 transitions, 11211 flow. Second operand has 17 states, 17 states have (on average 54.11764705882353) internal successors, (920), 17 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:36,936 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:36,936 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:49:36,936 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:37,642 INFO L129 PetriNetUnfolder]: 289/2054 cut-off events. [2021-10-13 22:49:37,642 INFO L130 PetriNetUnfolder]: For 211353/211850 co-relation queries the response was YES. [2021-10-13 22:49:37,670 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16720 conditions, 2054 events. 289/2054 cut-off events. For 211353/211850 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 17497 event pairs, 0 based on Foata normal form. 148/1985 useless extension candidates. Maximal degree in co-relation 16533. Up to 373 conditions per place. [2021-10-13 22:49:37,682 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 83 selfloop transitions, 257 changer transitions 8/392 dead transitions. [2021-10-13 22:49:37,682 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 392 transitions, 15175 flow [2021-10-13 22:49:37,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 22:49:37,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-10-13 22:49:37,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1783 transitions. [2021-10-13 22:49:37,684 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8442234848484849 [2021-10-13 22:49:37,684 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1783 transitions. [2021-10-13 22:49:37,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1783 transitions. [2021-10-13 22:49:37,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:37,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1783 transitions. [2021-10-13 22:49:37,685 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) [2021-10-13 22:49:37,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 66.0) internal successors, (2178), 33 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:37,687 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 66.0) internal successors, (2178), 33 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:37,687 INFO L186 Difference]: Start difference. First operand has 396 places, 351 transitions, 11211 flow. Second operand 32 states and 1783 transitions. [2021-10-13 22:49:37,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 392 transitions, 15175 flow [2021-10-13 22:49:38,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 392 transitions, 14410 flow, removed 226 selfloop flow, removed 25 redundant places. [2021-10-13 22:49:38,170 INFO L242 Difference]: Finished difference. Result has 406 places, 357 transitions, 11707 flow [2021-10-13 22:49:38,171 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=10612, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=11707, PETRI_PLACES=406, PETRI_TRANSITIONS=357} [2021-10-13 22:49:38,171 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 340 predicate places. [2021-10-13 22:49:38,171 INFO L470 AbstractCegarLoop]: Abstraction has has 406 places, 357 transitions, 11707 flow [2021-10-13 22:49:38,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 54.11764705882353) internal successors, (920), 17 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:38,171 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:38,171 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:49:38,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-10-13 22:49:38,387 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,SelfDestructingSolverStorable39 [2021-10-13 22:49:38,387 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:38,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:38,388 INFO L82 PathProgramCache]: Analyzing trace with hash 11312507, now seen corresponding path program 32 times [2021-10-13 22:49:38,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:38,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111675607] [2021-10-13 22:49:38,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:38,388 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:38,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:38,482 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:38,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:38,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111675607] [2021-10-13 22:49:38,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111675607] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:38,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979473371] [2021-10-13 22:49:38,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:49:38,483 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:38,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:38,484 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) [2021-10-13 22:49:38,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-13 22:49:39,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:49:39,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:39,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 22:49:39,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:39,488 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:39,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979473371] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:39,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:39,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-10-13 22:49:39,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459365212] [2021-10-13 22:49:39,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 22:49:39,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:39,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 22:49:39,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-10-13 22:49:39,490 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:49:39,490 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 357 transitions, 11707 flow. Second operand has 18 states, 18 states have (on average 54.111111111111114) internal successors, (974), 18 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:39,490 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:39,490 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:49:39,490 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:40,314 INFO L129 PetriNetUnfolder]: 295/2093 cut-off events. [2021-10-13 22:49:40,314 INFO L130 PetriNetUnfolder]: For 232970/233490 co-relation queries the response was YES. [2021-10-13 22:49:40,341 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17621 conditions, 2093 events. 295/2093 cut-off events. For 232970/233490 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 18036 event pairs, 0 based on Foata normal form. 153/2026 useless extension candidates. Maximal degree in co-relation 17429. Up to 381 conditions per place. [2021-10-13 22:49:40,353 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 82 selfloop transitions, 267 changer transitions 17/410 dead transitions. [2021-10-13 22:49:40,354 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 410 transitions, 16893 flow [2021-10-13 22:49:40,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-13 22:49:40,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-10-13 22:49:40,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2004 transitions. [2021-10-13 22:49:40,355 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8434343434343434 [2021-10-13 22:49:40,355 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2004 transitions. [2021-10-13 22:49:40,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2004 transitions. [2021-10-13 22:49:40,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:40,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2004 transitions. [2021-10-13 22:49:40,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 55.666666666666664) internal successors, (2004), 36 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:40,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:40,359 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:40,359 INFO L186 Difference]: Start difference. First operand has 406 places, 357 transitions, 11707 flow. Second operand 36 states and 2004 transitions. [2021-10-13 22:49:40,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 410 transitions, 16893 flow [2021-10-13 22:49:40,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 410 transitions, 15799 flow, removed 337 selfloop flow, removed 28 redundant places. [2021-10-13 22:49:40,887 INFO L242 Difference]: Finished difference. Result has 420 places, 369 transitions, 12491 flow [2021-10-13 22:49:40,887 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=11019, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=12491, PETRI_PLACES=420, PETRI_TRANSITIONS=369} [2021-10-13 22:49:40,887 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 354 predicate places. [2021-10-13 22:49:40,887 INFO L470 AbstractCegarLoop]: Abstraction has has 420 places, 369 transitions, 12491 flow [2021-10-13 22:49:40,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.111111111111114) internal successors, (974), 18 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:40,888 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:40,888 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:49:40,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-10-13 22:49:41,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:41,088 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:41,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:41,089 INFO L82 PathProgramCache]: Analyzing trace with hash 935917035, now seen corresponding path program 33 times [2021-10-13 22:49:41,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:41,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216593914] [2021-10-13 22:49:41,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:41,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:41,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:41,237 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:41,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:41,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216593914] [2021-10-13 22:49:41,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216593914] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:41,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883370253] [2021-10-13 22:49:41,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:49:41,237 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:41,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:41,238 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) [2021-10-13 22:49:41,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-13 22:49:42,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-10-13 22:49:42,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:42,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 22:49:42,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:42,376 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:42,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883370253] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:42,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:42,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-10-13 22:49:42,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020948023] [2021-10-13 22:49:42,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 22:49:42,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:42,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 22:49:42,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-10-13 22:49:42,378 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:49:42,378 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 369 transitions, 12491 flow. Second operand has 18 states, 18 states have (on average 54.111111111111114) internal successors, (974), 18 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:42,378 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:42,378 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:49:42,378 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:43,060 INFO L129 PetriNetUnfolder]: 291/2087 cut-off events. [2021-10-13 22:49:43,060 INFO L130 PetriNetUnfolder]: For 254948/255430 co-relation queries the response was YES. [2021-10-13 22:49:43,081 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17742 conditions, 2087 events. 291/2087 cut-off events. For 254948/255430 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 17967 event pairs, 0 based on Foata normal form. 60/1926 useless extension candidates. Maximal degree in co-relation 17545. Up to 450 conditions per place. [2021-10-13 22:49:43,094 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 296 selfloop transitions, 51 changer transitions 8/399 dead transitions. [2021-10-13 22:49:43,094 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 399 transitions, 15597 flow [2021-10-13 22:49:43,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-13 22:49:43,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-13 22:49:43,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1166 transitions. [2021-10-13 22:49:43,095 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8412698412698413 [2021-10-13 22:49:43,095 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1166 transitions. [2021-10-13 22:49:43,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1166 transitions. [2021-10-13 22:49:43,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:43,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1166 transitions. [2021-10-13 22:49:43,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 55.523809523809526) internal successors, (1166), 21 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:43,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 66.0) internal successors, (1452), 22 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:43,097 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 66.0) internal successors, (1452), 22 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:43,097 INFO L186 Difference]: Start difference. First operand has 420 places, 369 transitions, 12491 flow. Second operand 21 states and 1166 transitions. [2021-10-13 22:49:43,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 399 transitions, 15597 flow [2021-10-13 22:49:43,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 399 transitions, 14420 flow, removed 369 selfloop flow, removed 30 redundant places. [2021-10-13 22:49:43,656 INFO L242 Difference]: Finished difference. Result has 410 places, 371 transitions, 11717 flow [2021-10-13 22:49:43,657 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=11404, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=11717, PETRI_PLACES=410, PETRI_TRANSITIONS=371} [2021-10-13 22:49:43,657 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 344 predicate places. [2021-10-13 22:49:43,657 INFO L470 AbstractCegarLoop]: Abstraction has has 410 places, 371 transitions, 11717 flow [2021-10-13 22:49:43,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.111111111111114) internal successors, (974), 18 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:43,657 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:43,657 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:49:43,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-10-13 22:49:43,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:43,858 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:43,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:43,858 INFO L82 PathProgramCache]: Analyzing trace with hash -268180483, now seen corresponding path program 34 times [2021-10-13 22:49:43,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:43,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050340114] [2021-10-13 22:49:43,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:43,858 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:43,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:44,012 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:44,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:44,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050340114] [2021-10-13 22:49:44,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050340114] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:44,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468637665] [2021-10-13 22:49:44,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:49:44,013 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:44,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:44,013 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) [2021-10-13 22:49:44,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-13 22:49:45,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:49:45,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:45,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 22:49:45,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:45,393 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:45,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468637665] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:45,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:45,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-10-13 22:49:45,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501406358] [2021-10-13 22:49:45,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 22:49:45,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:45,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 22:49:45,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-10-13 22:49:45,409 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:49:45,409 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 371 transitions, 11717 flow. Second operand has 19 states, 19 states have (on average 54.1578947368421) internal successors, (1029), 19 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:45,409 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:45,409 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:49:45,409 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:46,168 INFO L129 PetriNetUnfolder]: 299/2152 cut-off events. [2021-10-13 22:49:46,168 INFO L130 PetriNetUnfolder]: For 258877/259350 co-relation queries the response was YES. [2021-10-13 22:49:46,201 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17931 conditions, 2152 events. 299/2152 cut-off events. For 258877/259350 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 18734 event pairs, 0 based on Foata normal form. 75/1999 useless extension candidates. Maximal degree in co-relation 17733. Up to 385 conditions per place. [2021-10-13 22:49:46,216 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 258 selfloop transitions, 98 changer transitions 8/408 dead transitions. [2021-10-13 22:49:46,216 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 408 transitions, 15293 flow [2021-10-13 22:49:46,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-13 22:49:46,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-10-13 22:49:46,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1386 transitions. [2021-10-13 22:49:46,218 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.84 [2021-10-13 22:49:46,218 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1386 transitions. [2021-10-13 22:49:46,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1386 transitions. [2021-10-13 22:49:46,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:46,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1386 transitions. [2021-10-13 22:49:46,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 55.44) internal successors, (1386), 25 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:46,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 66.0) internal successors, (1716), 26 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:46,221 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 66.0) internal successors, (1716), 26 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:46,221 INFO L186 Difference]: Start difference. First operand has 410 places, 371 transitions, 11717 flow. Second operand 25 states and 1386 transitions. [2021-10-13 22:49:46,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 408 transitions, 15293 flow [2021-10-13 22:49:46,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 408 transitions, 14922 flow, removed 139 selfloop flow, removed 18 redundant places. [2021-10-13 22:49:46,881 INFO L242 Difference]: Finished difference. Result has 422 places, 379 transitions, 12334 flow [2021-10-13 22:49:46,881 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=11502, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=12334, PETRI_PLACES=422, PETRI_TRANSITIONS=379} [2021-10-13 22:49:46,881 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 356 predicate places. [2021-10-13 22:49:46,881 INFO L470 AbstractCegarLoop]: Abstraction has has 422 places, 379 transitions, 12334 flow [2021-10-13 22:49:46,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.1578947368421) internal successors, (1029), 19 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:46,882 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:46,882 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:49:46,900 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-10-13 22:49:47,100 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,SelfDestructingSolverStorable42 [2021-10-13 22:49:47,100 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:47,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:47,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1705665643, now seen corresponding path program 35 times [2021-10-13 22:49:47,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:47,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928370896] [2021-10-13 22:49:47,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:47,101 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:47,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:47,244 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:47,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:47,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928370896] [2021-10-13 22:49:47,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928370896] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:47,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469832054] [2021-10-13 22:49:47,244 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:49:47,244 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:47,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:47,245 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:49:47,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-13 22:49:48,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-10-13 22:49:48,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:48,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 22:49:48,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:48,445 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:48,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469832054] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:48,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:48,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-10-13 22:49:48,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445621712] [2021-10-13 22:49:48,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 22:49:48,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:48,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 22:49:48,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-10-13 22:49:48,446 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:49:48,447 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 379 transitions, 12334 flow. Second operand has 18 states, 18 states have (on average 54.111111111111114) internal successors, (974), 18 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:48,447 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:48,447 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:49:48,447 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:49,200 INFO L129 PetriNetUnfolder]: 301/2170 cut-off events. [2021-10-13 22:49:49,201 INFO L130 PetriNetUnfolder]: For 254257/254720 co-relation queries the response was YES. [2021-10-13 22:49:49,220 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18035 conditions, 2170 events. 301/2170 cut-off events. For 254257/254720 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 18914 event pairs, 0 based on Foata normal form. 78/2018 useless extension candidates. Maximal degree in co-relation 17831. Up to 385 conditions per place. [2021-10-13 22:49:49,233 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 223 selfloop transitions, 135 changer transitions 8/410 dead transitions. [2021-10-13 22:49:49,233 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 410 transitions, 15600 flow [2021-10-13 22:49:49,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 22:49:49,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-13 22:49:49,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1331 transitions. [2021-10-13 22:49:49,234 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8402777777777778 [2021-10-13 22:49:49,234 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1331 transitions. [2021-10-13 22:49:49,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1331 transitions. [2021-10-13 22:49:49,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:49,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1331 transitions. [2021-10-13 22:49:49,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 55.458333333333336) internal successors, (1331), 24 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:49,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:49,236 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:49,236 INFO L186 Difference]: Start difference. First operand has 422 places, 379 transitions, 12334 flow. Second operand 24 states and 1331 transitions. [2021-10-13 22:49:49,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 410 transitions, 15600 flow [2021-10-13 22:49:49,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 410 transitions, 15268 flow, removed 105 selfloop flow, removed 18 redundant places. [2021-10-13 22:49:49,831 INFO L242 Difference]: Finished difference. Result has 429 places, 381 transitions, 12605 flow [2021-10-13 22:49:49,831 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=12110, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=12605, PETRI_PLACES=429, PETRI_TRANSITIONS=381} [2021-10-13 22:49:49,831 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 363 predicate places. [2021-10-13 22:49:49,832 INFO L470 AbstractCegarLoop]: Abstraction has has 429 places, 381 transitions, 12605 flow [2021-10-13 22:49:49,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.111111111111114) internal successors, (974), 18 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:49,832 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:49,832 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:49:49,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-13 22:49:50,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-10-13 22:49:50,045 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:50,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:50,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1584691767, now seen corresponding path program 36 times [2021-10-13 22:49:50,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:50,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282364684] [2021-10-13 22:49:50,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:50,046 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:50,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:50,177 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:50,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:50,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282364684] [2021-10-13 22:49:50,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282364684] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:50,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932364564] [2021-10-13 22:49:50,177 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:49:50,177 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:50,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:50,178 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:49:50,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-13 22:49:51,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-13 22:49:51,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:51,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 22:49:51,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:51,417 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:51,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932364564] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:51,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:51,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-10-13 22:49:51,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622815860] [2021-10-13 22:49:51,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 22:49:51,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:51,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 22:49:51,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-10-13 22:49:51,418 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:49:51,419 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 381 transitions, 12605 flow. Second operand has 19 states, 19 states have (on average 54.1578947368421) internal successors, (1029), 19 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:51,419 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:51,419 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:49:51,419 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:52,228 INFO L129 PetriNetUnfolder]: 315/2296 cut-off events. [2021-10-13 22:49:52,228 INFO L130 PetriNetUnfolder]: For 268243/268706 co-relation queries the response was YES. [2021-10-13 22:49:52,256 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19199 conditions, 2296 events. 315/2296 cut-off events. For 268243/268706 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 20521 event pairs, 0 based on Foata normal form. 94/2146 useless extension candidates. Maximal degree in co-relation 18993. Up to 409 conditions per place. [2021-10-13 22:49:52,269 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 198 selfloop transitions, 175 changer transitions 8/425 dead transitions. [2021-10-13 22:49:52,269 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 425 transitions, 16646 flow [2021-10-13 22:49:52,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-13 22:49:52,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-10-13 22:49:52,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1498 transitions. [2021-10-13 22:49:52,271 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8406285072951739 [2021-10-13 22:49:52,271 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1498 transitions. [2021-10-13 22:49:52,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1498 transitions. [2021-10-13 22:49:52,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:52,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1498 transitions. [2021-10-13 22:49:52,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 55.48148148148148) internal successors, (1498), 27 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:52,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 66.0) internal successors, (1848), 28 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:52,273 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 66.0) internal successors, (1848), 28 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:52,273 INFO L186 Difference]: Start difference. First operand has 429 places, 381 transitions, 12605 flow. Second operand 27 states and 1498 transitions. [2021-10-13 22:49:52,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 425 transitions, 16646 flow [2021-10-13 22:49:52,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 425 transitions, 16210 flow, removed 107 selfloop flow, removed 20 redundant places. [2021-10-13 22:49:52,876 INFO L242 Difference]: Finished difference. Result has 441 places, 395 transitions, 13656 flow [2021-10-13 22:49:52,877 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=12281, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=13656, PETRI_PLACES=441, PETRI_TRANSITIONS=395} [2021-10-13 22:49:52,877 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 375 predicate places. [2021-10-13 22:49:52,877 INFO L470 AbstractCegarLoop]: Abstraction has has 441 places, 395 transitions, 13656 flow [2021-10-13 22:49:52,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.1578947368421) internal successors, (1029), 19 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:52,877 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:52,877 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:49:52,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-10-13 22:49:53,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-10-13 22:49:53,084 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:53,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:53,084 INFO L82 PathProgramCache]: Analyzing trace with hash -2061298355, now seen corresponding path program 37 times [2021-10-13 22:49:53,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:53,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632510065] [2021-10-13 22:49:53,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:53,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:53,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:53,211 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:53,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:53,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632510065] [2021-10-13 22:49:53,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632510065] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:53,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143637063] [2021-10-13 22:49:53,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:49:53,211 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:53,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:53,212 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:49:53,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-13 22:49:54,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:54,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 22:49:54,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:54,460 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:54,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143637063] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:54,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:54,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-10-13 22:49:54,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310823728] [2021-10-13 22:49:54,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 22:49:54,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:54,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 22:49:54,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-10-13 22:49:54,462 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:49:54,462 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 395 transitions, 13656 flow. Second operand has 18 states, 18 states have (on average 54.111111111111114) internal successors, (974), 18 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:54,462 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:54,462 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:49:54,462 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:55,292 INFO L129 PetriNetUnfolder]: 319/2339 cut-off events. [2021-10-13 22:49:55,293 INFO L130 PetriNetUnfolder]: For 274101/274532 co-relation queries the response was YES. [2021-10-13 22:49:55,327 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19684 conditions, 2339 events. 319/2339 cut-off events. For 274101/274532 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 20980 event pairs, 0 based on Foata normal form. 100/2190 useless extension candidates. Maximal degree in co-relation 19472. Up to 417 conditions per place. [2021-10-13 22:49:55,341 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 173 selfloop transitions, 206 changer transitions 8/431 dead transitions. [2021-10-13 22:49:55,342 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 431 transitions, 17260 flow [2021-10-13 22:49:55,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 22:49:55,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-10-13 22:49:55,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1443 transitions. [2021-10-13 22:49:55,343 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8409090909090909 [2021-10-13 22:49:55,343 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1443 transitions. [2021-10-13 22:49:55,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1443 transitions. [2021-10-13 22:49:55,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:55,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1443 transitions. [2021-10-13 22:49:55,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 55.5) internal successors, (1443), 26 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:55,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 66.0) internal successors, (1782), 27 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:55,345 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 66.0) internal successors, (1782), 27 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:55,345 INFO L186 Difference]: Start difference. First operand has 441 places, 395 transitions, 13656 flow. Second operand 26 states and 1443 transitions. [2021-10-13 22:49:55,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 431 transitions, 17260 flow [2021-10-13 22:49:56,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 431 transitions, 16811 flow, removed 113 selfloop flow, removed 21 redundant places. [2021-10-13 22:49:56,110 INFO L242 Difference]: Finished difference. Result has 449 places, 399 transitions, 14150 flow [2021-10-13 22:49:56,110 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=13323, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=14150, PETRI_PLACES=449, PETRI_TRANSITIONS=399} [2021-10-13 22:49:56,110 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 383 predicate places. [2021-10-13 22:49:56,111 INFO L470 AbstractCegarLoop]: Abstraction has has 449 places, 399 transitions, 14150 flow [2021-10-13 22:49:56,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.111111111111114) internal successors, (974), 18 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:56,111 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:56,111 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:49:56,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-10-13 22:49:56,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-10-13 22:49:56,311 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:56,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:56,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1100370105, now seen corresponding path program 38 times [2021-10-13 22:49:56,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:56,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665204211] [2021-10-13 22:49:56,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:56,312 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:56,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:56,428 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:56,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:56,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665204211] [2021-10-13 22:49:56,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665204211] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:56,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607693848] [2021-10-13 22:49:56,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:49:56,429 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:56,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:56,430 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:49:56,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-13 22:49:57,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:49:57,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:57,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 22:49:57,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:57,667 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:57,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607693848] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:57,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:57,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-10-13 22:49:57,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388873056] [2021-10-13 22:49:57,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 22:49:57,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:57,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 22:49:57,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-10-13 22:49:57,668 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:49:57,669 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 399 transitions, 14150 flow. Second operand has 18 states, 18 states have (on average 54.111111111111114) internal successors, (974), 18 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:57,669 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:57,669 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:49:57,669 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:58,549 INFO L129 PetriNetUnfolder]: 323/2354 cut-off events. [2021-10-13 22:49:58,549 INFO L130 PetriNetUnfolder]: For 281542/282014 co-relation queries the response was YES. [2021-10-13 22:49:58,581 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20132 conditions, 2354 events. 323/2354 cut-off events. For 281542/282014 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 21138 event pairs, 0 based on Foata normal form. 143/2248 useless extension candidates. Maximal degree in co-relation 19916. Up to 425 conditions per place. [2021-10-13 22:49:58,596 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 93 selfloop transitions, 295 changer transitions 8/440 dead transitions. [2021-10-13 22:49:58,596 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 440 transitions, 18227 flow [2021-10-13 22:49:58,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 22:49:58,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-10-13 22:49:58,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1667 transitions. [2021-10-13 22:49:58,597 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.841919191919192 [2021-10-13 22:49:58,597 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1667 transitions. [2021-10-13 22:49:58,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1667 transitions. [2021-10-13 22:49:58,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:58,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1667 transitions. [2021-10-13 22:49:58,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 55.56666666666667) internal successors, (1667), 30 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:58,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:58,600 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:58,600 INFO L186 Difference]: Start difference. First operand has 449 places, 399 transitions, 14150 flow. Second operand 30 states and 1667 transitions. [2021-10-13 22:49:58,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 440 transitions, 18227 flow [2021-10-13 22:49:59,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 440 transitions, 17754 flow, removed 123 selfloop flow, removed 19 redundant places. [2021-10-13 22:49:59,384 INFO L242 Difference]: Finished difference. Result has 463 places, 404 transitions, 14912 flow [2021-10-13 22:49:59,385 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=13813, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=14912, PETRI_PLACES=463, PETRI_TRANSITIONS=404} [2021-10-13 22:49:59,385 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 397 predicate places. [2021-10-13 22:49:59,385 INFO L470 AbstractCegarLoop]: Abstraction has has 463 places, 404 transitions, 14912 flow [2021-10-13 22:49:59,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.111111111111114) internal successors, (974), 18 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:59,385 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:59,385 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:49:59,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-10-13 22:49:59,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:59,599 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:59,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:59,600 INFO L82 PathProgramCache]: Analyzing trace with hash -147723957, now seen corresponding path program 39 times [2021-10-13 22:49:59,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:59,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200314087] [2021-10-13 22:49:59,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:59,600 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:59,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:59,708 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:59,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:59,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200314087] [2021-10-13 22:49:59,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200314087] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:59,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229828534] [2021-10-13 22:49:59,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:49:59,709 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:59,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:59,710 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:49:59,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-13 22:50:00,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-13 22:50:00,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:50:00,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 22:50:00,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:50:00,969 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:00,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229828534] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:00,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:50:00,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-10-13 22:50:00,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187582647] [2021-10-13 22:50:00,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 22:50:00,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:50:00,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 22:50:00,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-10-13 22:50:00,971 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:50:00,972 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 404 transitions, 14912 flow. Second operand has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:00,972 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:50:00,972 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:50:00,972 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:50:02,089 INFO L129 PetriNetUnfolder]: 335/2409 cut-off events. [2021-10-13 22:50:02,090 INFO L130 PetriNetUnfolder]: For 302165/302647 co-relation queries the response was YES. [2021-10-13 22:50:02,124 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21325 conditions, 2409 events. 335/2409 cut-off events. For 302165/302647 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 21546 event pairs, 0 based on Foata normal form. 152/2309 useless extension candidates. Maximal degree in co-relation 21105. Up to 441 conditions per place. [2021-10-13 22:50:02,139 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 77 selfloop transitions, 324 changer transitions 14/459 dead transitions. [2021-10-13 22:50:02,139 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 459 transitions, 20304 flow [2021-10-13 22:50:02,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-13 22:50:02,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-10-13 22:50:02,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2004 transitions. [2021-10-13 22:50:02,140 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8434343434343434 [2021-10-13 22:50:02,140 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2004 transitions. [2021-10-13 22:50:02,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2004 transitions. [2021-10-13 22:50:02,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:50:02,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2004 transitions. [2021-10-13 22:50:02,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 55.666666666666664) internal successors, (2004), 36 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:02,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:02,144 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:02,144 INFO L186 Difference]: Start difference. First operand has 463 places, 404 transitions, 14912 flow. Second operand 36 states and 2004 transitions. [2021-10-13 22:50:02,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 459 transitions, 20304 flow [2021-10-13 22:50:03,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 459 transitions, 19456 flow, removed 192 selfloop flow, removed 24 redundant places. [2021-10-13 22:50:03,028 INFO L242 Difference]: Finished difference. Result has 482 places, 416 transitions, 15814 flow [2021-10-13 22:50:03,028 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=14206, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=313, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=15814, PETRI_PLACES=482, PETRI_TRANSITIONS=416} [2021-10-13 22:50:03,028 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 416 predicate places. [2021-10-13 22:50:03,028 INFO L470 AbstractCegarLoop]: Abstraction has has 482 places, 416 transitions, 15814 flow [2021-10-13 22:50:03,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:03,028 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:50:03,029 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:50:03,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-10-13 22:50:03,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-10-13 22:50:03,229 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:50:03,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:50:03,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1140535151, now seen corresponding path program 40 times [2021-10-13 22:50:03,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:50:03,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896323632] [2021-10-13 22:50:03,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:50:03,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:50:03,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:50:03,361 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 22:50:03,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:50:03,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896323632] [2021-10-13 22:50:03,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896323632] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:03,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239368694] [2021-10-13 22:50:03,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:50:03,361 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:03,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:50:03,362 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:50:03,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-10-13 22:50:04,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:50:04,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:50:04,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 22:50:04,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:50:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 22:50:04,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239368694] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:04,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:50:04,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-10-13 22:50:04,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559595006] [2021-10-13 22:50:04,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 22:50:04,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:50:04,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 22:50:04,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-10-13 22:50:04,652 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:50:04,652 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 416 transitions, 15814 flow. Second operand has 18 states, 18 states have (on average 54.166666666666664) internal successors, (975), 18 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:04,652 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:50:04,652 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:50:04,652 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:50:05,771 INFO L129 PetriNetUnfolder]: 332/2419 cut-off events. [2021-10-13 22:50:05,771 INFO L130 PetriNetUnfolder]: For 347488/347962 co-relation queries the response was YES. [2021-10-13 22:50:05,801 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22247 conditions, 2419 events. 332/2419 cut-off events. For 347488/347962 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 21817 event pairs, 0 based on Foata normal form. 162/2326 useless extension candidates. Maximal degree in co-relation 22019. Up to 437 conditions per place. [2021-10-13 22:50:05,821 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 114 selfloop transitions, 285 changer transitions 5/448 dead transitions. [2021-10-13 22:50:05,821 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 448 transitions, 19898 flow [2021-10-13 22:50:05,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-13 22:50:05,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-13 22:50:05,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1723 transitions. [2021-10-13 22:50:05,823 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8421309872922776 [2021-10-13 22:50:05,823 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1723 transitions. [2021-10-13 22:50:05,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1723 transitions. [2021-10-13 22:50:05,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:50:05,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1723 transitions. [2021-10-13 22:50:05,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 55.58064516129032) internal successors, (1723), 31 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:05,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 66.0) internal successors, (2112), 32 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:05,826 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 66.0) internal successors, (2112), 32 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:05,826 INFO L186 Difference]: Start difference. First operand has 482 places, 416 transitions, 15814 flow. Second operand 31 states and 1723 transitions. [2021-10-13 22:50:05,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 448 transitions, 19898 flow [2021-10-13 22:50:06,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 448 transitions, 18624 flow, removed 402 selfloop flow, removed 27 redundant places. [2021-10-13 22:50:06,913 INFO L242 Difference]: Finished difference. Result has 484 places, 419 transitions, 15623 flow [2021-10-13 22:50:06,914 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=14728, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=15623, PETRI_PLACES=484, PETRI_TRANSITIONS=419} [2021-10-13 22:50:06,914 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 418 predicate places. [2021-10-13 22:50:06,914 INFO L470 AbstractCegarLoop]: Abstraction has has 484 places, 419 transitions, 15623 flow [2021-10-13 22:50:06,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.166666666666664) internal successors, (975), 18 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:06,915 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:50:06,915 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:50:06,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-10-13 22:50:07,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-10-13 22:50:07,128 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:50:07,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:50:07,128 INFO L82 PathProgramCache]: Analyzing trace with hash 880298984, now seen corresponding path program 41 times [2021-10-13 22:50:07,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:50:07,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755141842] [2021-10-13 22:50:07,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:50:07,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:50:07,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:50:07,292 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:07,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:50:07,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755141842] [2021-10-13 22:50:07,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755141842] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:07,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471717188] [2021-10-13 22:50:07,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:50:07,293 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:07,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:50:07,293 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:50:07,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-10-13 22:50:08,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-10-13 22:50:08,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:50:08,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 22:50:08,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:50:08,757 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:08,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471717188] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:08,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:50:08,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-10-13 22:50:08,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433799496] [2021-10-13 22:50:08,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 22:50:08,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:50:08,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 22:50:08,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-10-13 22:50:08,758 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:50:08,759 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 419 transitions, 15623 flow. Second operand has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:08,759 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:50:08,759 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:50:08,759 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:50:09,559 INFO L129 PetriNetUnfolder]: 336/2426 cut-off events. [2021-10-13 22:50:09,559 INFO L130 PetriNetUnfolder]: For 334594/335145 co-relation queries the response was YES. [2021-10-13 22:50:09,596 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22018 conditions, 2426 events. 336/2426 cut-off events. For 334594/335145 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 21806 event pairs, 0 based on Foata normal form. 68/2234 useless extension candidates. Maximal degree in co-relation 21791. Up to 580 conditions per place. [2021-10-13 22:50:09,612 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 367 selfloop transitions, 27 changer transitions 8/446 dead transitions. [2021-10-13 22:50:09,612 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 446 transitions, 18963 flow [2021-10-13 22:50:09,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-13 22:50:09,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-13 22:50:09,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1165 transitions. [2021-10-13 22:50:09,613 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8405483405483406 [2021-10-13 22:50:09,613 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1165 transitions. [2021-10-13 22:50:09,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1165 transitions. [2021-10-13 22:50:09,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:50:09,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1165 transitions. [2021-10-13 22:50:09,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 55.476190476190474) internal successors, (1165), 21 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:09,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 66.0) internal successors, (1452), 22 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:09,615 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 66.0) internal successors, (1452), 22 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:09,615 INFO L186 Difference]: Start difference. First operand has 484 places, 419 transitions, 15623 flow. Second operand 21 states and 1165 transitions. [2021-10-13 22:50:09,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 446 transitions, 18963 flow [2021-10-13 22:50:10,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 446 transitions, 18273 flow, removed 102 selfloop flow, removed 27 redundant places. [2021-10-13 22:50:10,529 INFO L242 Difference]: Finished difference. Result has 480 places, 421 transitions, 15285 flow [2021-10-13 22:50:10,529 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=15011, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=15285, PETRI_PLACES=480, PETRI_TRANSITIONS=421} [2021-10-13 22:50:10,529 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 414 predicate places. [2021-10-13 22:50:10,529 INFO L470 AbstractCegarLoop]: Abstraction has has 480 places, 421 transitions, 15285 flow [2021-10-13 22:50:10,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:10,529 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:50:10,530 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:50:10,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-10-13 22:50:10,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-10-13 22:50:10,730 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:50:10,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:50:10,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1439829906, now seen corresponding path program 42 times [2021-10-13 22:50:10,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:50:10,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191228834] [2021-10-13 22:50:10,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:50:10,731 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:50:10,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:50:10,888 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:10,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:50:10,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191228834] [2021-10-13 22:50:10,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191228834] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:10,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887777421] [2021-10-13 22:50:10,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:50:10,888 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:10,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:50:10,889 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:50:10,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-10-13 22:50:12,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-10-13 22:50:12,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:50:12,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 22:50:12,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:50:12,414 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:12,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887777421] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:12,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:50:12,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-10-13 22:50:12,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761474482] [2021-10-13 22:50:12,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 22:50:12,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:50:12,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 22:50:12,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-10-13 22:50:12,416 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:50:12,416 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 421 transitions, 15285 flow. Second operand has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:12,416 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:50:12,416 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:50:12,416 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:50:13,300 INFO L129 PetriNetUnfolder]: 338/2451 cut-off events. [2021-10-13 22:50:13,300 INFO L130 PetriNetUnfolder]: For 341853/342370 co-relation queries the response was YES. [2021-10-13 22:50:13,335 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22119 conditions, 2451 events. 338/2451 cut-off events. For 341853/342370 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 21967 event pairs, 0 based on Foata normal form. 71/2259 useless extension candidates. Maximal degree in co-relation 21890. Up to 544 conditions per place. [2021-10-13 22:50:13,350 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 348 selfloop transitions, 49 changer transitions 8/449 dead transitions. [2021-10-13 22:50:13,350 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 449 transitions, 18749 flow [2021-10-13 22:50:13,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 22:50:13,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-13 22:50:13,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1332 transitions. [2021-10-13 22:50:13,351 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8409090909090909 [2021-10-13 22:50:13,351 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1332 transitions. [2021-10-13 22:50:13,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1332 transitions. [2021-10-13 22:50:13,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:50:13,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1332 transitions. [2021-10-13 22:50:13,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 55.5) internal successors, (1332), 24 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:13,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:13,354 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:13,354 INFO L186 Difference]: Start difference. First operand has 480 places, 421 transitions, 15285 flow. Second operand 24 states and 1332 transitions. [2021-10-13 22:50:13,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 449 transitions, 18749 flow [2021-10-13 22:50:14,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 449 transitions, 18539 flow, removed 80 selfloop flow, removed 18 redundant places. [2021-10-13 22:50:14,432 INFO L242 Difference]: Finished difference. Result has 487 places, 423 transitions, 15449 flow [2021-10-13 22:50:14,433 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=15123, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=15449, PETRI_PLACES=487, PETRI_TRANSITIONS=423} [2021-10-13 22:50:14,433 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 421 predicate places. [2021-10-13 22:50:14,433 INFO L470 AbstractCegarLoop]: Abstraction has has 487 places, 423 transitions, 15449 flow [2021-10-13 22:50:14,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:14,433 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:50:14,433 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:50:14,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-10-13 22:50:14,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:14,634 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:50:14,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:50:14,635 INFO L82 PathProgramCache]: Analyzing trace with hash 29345650, now seen corresponding path program 43 times [2021-10-13 22:50:14,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:50:14,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931507436] [2021-10-13 22:50:14,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:50:14,635 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:50:14,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:50:14,812 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:14,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:50:14,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931507436] [2021-10-13 22:50:14,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931507436] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:14,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876501110] [2021-10-13 22:50:14,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:50:14,813 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:14,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:50:14,814 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:50:14,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-10-13 22:50:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:50:15,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 22:50:15,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:50:16,286 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:16,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876501110] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:16,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:50:16,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-10-13 22:50:16,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379295064] [2021-10-13 22:50:16,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 22:50:16,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:50:16,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 22:50:16,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-10-13 22:50:16,287 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:50:16,288 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 423 transitions, 15449 flow. Second operand has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:16,288 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:50:16,288 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:50:16,288 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:50:17,283 INFO L129 PetriNetUnfolder]: 340/2462 cut-off events. [2021-10-13 22:50:17,284 INFO L130 PetriNetUnfolder]: For 353233/353780 co-relation queries the response was YES. [2021-10-13 22:50:17,320 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22552 conditions, 2462 events. 340/2462 cut-off events. For 353233/353780 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 22112 event pairs, 0 based on Foata normal form. 73/2271 useless extension candidates. Maximal degree in co-relation 22321. Up to 512 conditions per place. [2021-10-13 22:50:17,337 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 332 selfloop transitions, 68 changer transitions 8/452 dead transitions. [2021-10-13 22:50:17,337 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 452 transitions, 19087 flow [2021-10-13 22:50:17,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-13 22:50:17,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-10-13 22:50:17,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1388 transitions. [2021-10-13 22:50:17,338 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8412121212121212 [2021-10-13 22:50:17,338 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1388 transitions. [2021-10-13 22:50:17,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1388 transitions. [2021-10-13 22:50:17,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:50:17,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1388 transitions. [2021-10-13 22:50:17,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 55.52) internal successors, (1388), 25 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:17,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 66.0) internal successors, (1716), 26 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:17,340 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 66.0) internal successors, (1716), 26 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:17,340 INFO L186 Difference]: Start difference. First operand has 487 places, 423 transitions, 15449 flow. Second operand 25 states and 1388 transitions. [2021-10-13 22:50:17,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 452 transitions, 19087 flow [2021-10-13 22:50:18,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 452 transitions, 18769 flow, removed 114 selfloop flow, removed 21 redundant places. [2021-10-13 22:50:18,418 INFO L242 Difference]: Finished difference. Result has 492 places, 425 transitions, 15607 flow [2021-10-13 22:50:18,418 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=15239, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=15607, PETRI_PLACES=492, PETRI_TRANSITIONS=425} [2021-10-13 22:50:18,418 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 426 predicate places. [2021-10-13 22:50:18,418 INFO L470 AbstractCegarLoop]: Abstraction has has 492 places, 425 transitions, 15607 flow [2021-10-13 22:50:18,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:18,418 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:50:18,418 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:50:18,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-10-13 22:50:18,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:18,619 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:50:18,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:50:18,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1559983514, now seen corresponding path program 44 times [2021-10-13 22:50:18,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:50:18,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780205351] [2021-10-13 22:50:18,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:50:18,619 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:50:18,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:50:18,766 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:18,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:50:18,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780205351] [2021-10-13 22:50:18,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780205351] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:18,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217500676] [2021-10-13 22:50:18,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:50:18,767 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:18,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:50:18,767 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:50:18,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-10-13 22:50:19,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:50:19,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:50:19,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 22:50:19,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:50:20,256 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:20,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217500676] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:20,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:50:20,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-10-13 22:50:20,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855798738] [2021-10-13 22:50:20,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 22:50:20,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:50:20,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 22:50:20,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-10-13 22:50:20,258 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:50:20,258 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 425 transitions, 15607 flow. Second operand has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:20,258 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:50:20,258 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:50:20,258 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:50:21,265 INFO L129 PetriNetUnfolder]: 353/2586 cut-off events. [2021-10-13 22:50:21,265 INFO L130 PetriNetUnfolder]: For 370107/370618 co-relation queries the response was YES. [2021-10-13 22:50:21,295 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23642 conditions, 2586 events. 353/2586 cut-off events. For 370107/370618 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 23542 event pairs, 0 based on Foata normal form. 94/2403 useless extension candidates. Maximal degree in co-relation 23409. Up to 469 conditions per place. [2021-10-13 22:50:21,310 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 244 selfloop transitions, 175 changer transitions 8/471 dead transitions. [2021-10-13 22:50:21,310 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 471 transitions, 20317 flow [2021-10-13 22:50:21,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 22:50:21,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-10-13 22:50:21,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1609 transitions. [2021-10-13 22:50:21,312 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8406478578892372 [2021-10-13 22:50:21,312 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1609 transitions. [2021-10-13 22:50:21,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1609 transitions. [2021-10-13 22:50:21,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:50:21,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1609 transitions. [2021-10-13 22:50:21,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 55.48275862068966) internal successors, (1609), 29 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:21,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:21,314 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:21,314 INFO L186 Difference]: Start difference. First operand has 492 places, 425 transitions, 15607 flow. Second operand 29 states and 1609 transitions. [2021-10-13 22:50:21,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 471 transitions, 20317 flow [2021-10-13 22:50:22,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 471 transitions, 19949 flow, removed 122 selfloop flow, removed 22 redundant places. [2021-10-13 22:50:22,276 INFO L242 Difference]: Finished difference. Result has 507 places, 439 transitions, 16870 flow [2021-10-13 22:50:22,277 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=15363, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=16870, PETRI_PLACES=507, PETRI_TRANSITIONS=439} [2021-10-13 22:50:22,277 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 441 predicate places. [2021-10-13 22:50:22,277 INFO L470 AbstractCegarLoop]: Abstraction has has 507 places, 439 transitions, 16870 flow [2021-10-13 22:50:22,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:22,277 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:50:22,277 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:50:22,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-10-13 22:50:22,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:22,478 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:50:22,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:50:22,478 INFO L82 PathProgramCache]: Analyzing trace with hash -2069429262, now seen corresponding path program 45 times [2021-10-13 22:50:22,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:50:22,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897256747] [2021-10-13 22:50:22,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:50:22,479 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:50:22,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:50:22,612 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:22,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:50:22,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897256747] [2021-10-13 22:50:22,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897256747] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:22,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550376105] [2021-10-13 22:50:22,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:50:22,612 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:22,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:50:22,613 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:50:22,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-10-13 22:50:23,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-10-13 22:50:23,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:50:23,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-13 22:50:23,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:50:24,178 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:24,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550376105] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:24,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:50:24,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-10-13 22:50:24,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085138577] [2021-10-13 22:50:24,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 22:50:24,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:50:24,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 22:50:24,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-10-13 22:50:24,179 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:50:24,180 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 439 transitions, 16870 flow. Second operand has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:24,180 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:50:24,180 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:50:24,180 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:50:25,269 INFO L129 PetriNetUnfolder]: 355/2597 cut-off events. [2021-10-13 22:50:25,270 INFO L130 PetriNetUnfolder]: For 385940/386506 co-relation queries the response was YES. [2021-10-13 22:50:25,298 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24196 conditions, 2597 events. 355/2597 cut-off events. For 385940/386506 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 23649 event pairs, 0 based on Foata normal form. 118/2437 useless extension candidates. Maximal degree in co-relation 23953. Up to 473 conditions per place. [2021-10-13 22:50:25,314 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 207 selfloop transitions, 213 changer transitions 8/472 dead transitions. [2021-10-13 22:50:25,314 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 472 transitions, 20996 flow [2021-10-13 22:50:25,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 22:50:25,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-10-13 22:50:25,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1665 transitions. [2021-10-13 22:50:25,316 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8409090909090909 [2021-10-13 22:50:25,316 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1665 transitions. [2021-10-13 22:50:25,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1665 transitions. [2021-10-13 22:50:25,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:50:25,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1665 transitions. [2021-10-13 22:50:25,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 55.5) internal successors, (1665), 30 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:25,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:25,318 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:25,318 INFO L186 Difference]: Start difference. First operand has 507 places, 439 transitions, 16870 flow. Second operand 30 states and 1665 transitions. [2021-10-13 22:50:25,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 472 transitions, 20996 flow [2021-10-13 22:50:26,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 472 transitions, 20489 flow, removed 176 selfloop flow, removed 22 redundant places. [2021-10-13 22:50:26,684 INFO L242 Difference]: Finished difference. Result has 516 places, 441 transitions, 17142 flow [2021-10-13 22:50:26,684 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=16455, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=17142, PETRI_PLACES=516, PETRI_TRANSITIONS=441} [2021-10-13 22:50:26,685 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 450 predicate places. [2021-10-13 22:50:26,685 INFO L470 AbstractCegarLoop]: Abstraction has has 516 places, 441 transitions, 17142 flow [2021-10-13 22:50:26,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:26,685 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:50:26,685 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:50:26,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-10-13 22:50:26,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-10-13 22:50:26,886 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:50:26,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:50:26,886 INFO L82 PathProgramCache]: Analyzing trace with hash 70007892, now seen corresponding path program 46 times [2021-10-13 22:50:26,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:50:26,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227626075] [2021-10-13 22:50:26,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:50:26,887 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:50:26,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:50:27,047 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:27,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:50:27,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227626075] [2021-10-13 22:50:27,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227626075] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:27,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736895180] [2021-10-13 22:50:27,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:50:27,047 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:27,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:50:27,048 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:50:27,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-10-13 22:50:28,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:50:28,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:50:28,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 22:50:28,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:50:28,696 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:28,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736895180] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:28,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:50:28,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-10-13 22:50:28,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597077535] [2021-10-13 22:50:28,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 22:50:28,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:50:28,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 22:50:28,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-10-13 22:50:28,698 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:50:28,698 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 441 transitions, 17142 flow. Second operand has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:28,698 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:50:28,698 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:50:28,699 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:50:29,802 INFO L129 PetriNetUnfolder]: 357/2622 cut-off events. [2021-10-13 22:50:29,803 INFO L130 PetriNetUnfolder]: For 392658/393170 co-relation queries the response was YES. [2021-10-13 22:50:29,833 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24618 conditions, 2622 events. 357/2622 cut-off events. For 392658/393170 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 23933 event pairs, 0 based on Foata normal form. 140/2481 useless extension candidates. Maximal degree in co-relation 24376. Up to 475 conditions per place. [2021-10-13 22:50:29,850 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 154 selfloop transitions, 269 changer transitions 8/475 dead transitions. [2021-10-13 22:50:29,850 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 475 transitions, 21511 flow [2021-10-13 22:50:29,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 22:50:29,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-10-13 22:50:29,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1777 transitions. [2021-10-13 22:50:29,852 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8413825757575758 [2021-10-13 22:50:29,852 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1777 transitions. [2021-10-13 22:50:29,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1777 transitions. [2021-10-13 22:50:29,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:50:29,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1777 transitions. [2021-10-13 22:50:29,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.53125) internal successors, (1777), 32 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:29,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 66.0) internal successors, (2178), 33 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:29,921 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 66.0) internal successors, (2178), 33 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:29,922 INFO L186 Difference]: Start difference. First operand has 516 places, 441 transitions, 17142 flow. Second operand 32 states and 1777 transitions. [2021-10-13 22:50:29,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 475 transitions, 21511 flow [2021-10-13 22:50:30,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 475 transitions, 20882 flow, removed 148 selfloop flow, removed 27 redundant places. [2021-10-13 22:50:30,889 INFO L242 Difference]: Finished difference. Result has 522 places, 443 transitions, 17491 flow [2021-10-13 22:50:30,889 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=16679, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=17491, PETRI_PLACES=522, PETRI_TRANSITIONS=443} [2021-10-13 22:50:30,889 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 456 predicate places. [2021-10-13 22:50:30,889 INFO L470 AbstractCegarLoop]: Abstraction has has 522 places, 443 transitions, 17491 flow [2021-10-13 22:50:30,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:30,890 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:50:30,890 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:50:30,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-10-13 22:50:31,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-10-13 22:50:31,090 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:50:31,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:50:31,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1740345410, now seen corresponding path program 47 times [2021-10-13 22:50:31,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:50:31,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328639568] [2021-10-13 22:50:31,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:50:31,091 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:50:31,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:50:31,217 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:31,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:50:31,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328639568] [2021-10-13 22:50:31,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328639568] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:31,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666685804] [2021-10-13 22:50:31,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:50:31,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:31,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:50:31,218 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:50:31,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-10-13 22:50:32,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-10-13 22:50:32,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:50:32,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 22:50:32,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:50:32,744 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:32,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666685804] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:32,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:50:32,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-10-13 22:50:32,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270807474] [2021-10-13 22:50:32,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 22:50:32,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:50:32,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 22:50:32,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-10-13 22:50:32,746 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:50:32,747 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 443 transitions, 17491 flow. Second operand has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:32,747 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:50:32,747 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:50:32,747 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:50:33,927 INFO L129 PetriNetUnfolder]: 363/2662 cut-off events. [2021-10-13 22:50:33,928 INFO L130 PetriNetUnfolder]: For 392948/393514 co-relation queries the response was YES. [2021-10-13 22:50:33,959 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25090 conditions, 2662 events. 363/2662 cut-off events. For 392948/393514 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 24364 event pairs, 0 based on Foata normal form. 169/2548 useless extension candidates. Maximal degree in co-relation 24848. Up to 487 conditions per place. [2021-10-13 22:50:33,976 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 103 selfloop transitions, 329 changer transitions 8/484 dead transitions. [2021-10-13 22:50:33,977 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 484 transitions, 22454 flow [2021-10-13 22:50:33,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-13 22:50:33,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-10-13 22:50:33,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1945 transitions. [2021-10-13 22:50:33,978 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.841991341991342 [2021-10-13 22:50:33,978 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1945 transitions. [2021-10-13 22:50:33,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1945 transitions. [2021-10-13 22:50:33,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:50:33,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1945 transitions. [2021-10-13 22:50:33,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 55.57142857142857) internal successors, (1945), 35 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:33,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 66.0) internal successors, (2376), 36 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:33,981 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 66.0) internal successors, (2376), 36 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:33,981 INFO L186 Difference]: Start difference. First operand has 522 places, 443 transitions, 17491 flow. Second operand 35 states and 1945 transitions. [2021-10-13 22:50:33,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 484 transitions, 22454 flow [2021-10-13 22:50:35,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 484 transitions, 21758 flow, removed 139 selfloop flow, removed 27 redundant places. [2021-10-13 22:50:35,020 INFO L242 Difference]: Finished difference. Result has 532 places, 450 transitions, 18217 flow [2021-10-13 22:50:35,021 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=16943, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=18217, PETRI_PLACES=532, PETRI_TRANSITIONS=450} [2021-10-13 22:50:35,021 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 466 predicate places. [2021-10-13 22:50:35,021 INFO L470 AbstractCegarLoop]: Abstraction has has 532 places, 450 transitions, 18217 flow [2021-10-13 22:50:35,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:35,021 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:50:35,021 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:50:35,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-10-13 22:50:35,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-10-13 22:50:35,222 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:50:35,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:50:35,222 INFO L82 PathProgramCache]: Analyzing trace with hash -764318568, now seen corresponding path program 48 times [2021-10-13 22:50:35,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:50:35,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234966999] [2021-10-13 22:50:35,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:50:35,222 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:50:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:50:35,384 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:35,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:50:35,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234966999] [2021-10-13 22:50:35,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234966999] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:35,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673669258] [2021-10-13 22:50:35,384 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:50:35,384 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:35,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:50:35,385 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:50:35,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-10-13 22:50:36,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-10-13 22:50:36,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:50:36,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 22:50:36,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:50:36,938 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:36,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673669258] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:36,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:50:36,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-10-13 22:50:36,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194678829] [2021-10-13 22:50:36,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 22:50:36,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:50:36,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 22:50:36,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-10-13 22:50:36,940 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:50:36,940 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 450 transitions, 18217 flow. Second operand has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:36,940 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:50:36,940 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:50:36,940 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:50:38,194 INFO L129 PetriNetUnfolder]: 369/2700 cut-off events. [2021-10-13 22:50:38,195 INFO L130 PetriNetUnfolder]: For 409953/410476 co-relation queries the response was YES. [2021-10-13 22:50:38,232 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25842 conditions, 2700 events. 369/2700 cut-off events. For 409953/410476 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 24753 event pairs, 0 based on Foata normal form. 179/2594 useless extension candidates. Maximal degree in co-relation 25597. Up to 496 conditions per place. [2021-10-13 22:50:38,253 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 100 selfloop transitions, 340 changer transitions 8/492 dead transitions. [2021-10-13 22:50:38,253 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 492 transitions, 23411 flow [2021-10-13 22:50:38,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-13 22:50:38,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-10-13 22:50:38,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2002 transitions. [2021-10-13 22:50:38,255 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8425925925925926 [2021-10-13 22:50:38,255 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2002 transitions. [2021-10-13 22:50:38,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2002 transitions. [2021-10-13 22:50:38,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:50:38,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2002 transitions. [2021-10-13 22:50:38,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 55.611111111111114) internal successors, (2002), 36 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:38,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:38,258 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:38,258 INFO L186 Difference]: Start difference. First operand has 532 places, 450 transitions, 18217 flow. Second operand 36 states and 2002 transitions. [2021-10-13 22:50:38,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 492 transitions, 23411 flow [2021-10-13 22:50:39,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 492 transitions, 22324 flow, removed 210 selfloop flow, removed 34 redundant places. [2021-10-13 22:50:39,302 INFO L242 Difference]: Finished difference. Result has 537 places, 456 transitions, 18533 flow [2021-10-13 22:50:39,302 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=17248, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=335, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=18533, PETRI_PLACES=537, PETRI_TRANSITIONS=456} [2021-10-13 22:50:39,302 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 471 predicate places. [2021-10-13 22:50:39,302 INFO L470 AbstractCegarLoop]: Abstraction has has 537 places, 456 transitions, 18533 flow [2021-10-13 22:50:39,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:39,303 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:50:39,303 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:50:39,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-10-13 22:50:39,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-10-13 22:50:39,523 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:50:39,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:50:39,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1808341511, now seen corresponding path program 49 times [2021-10-13 22:50:39,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:50:39,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667421261] [2021-10-13 22:50:39,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:50:39,524 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:50:39,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:50:39,658 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 178 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 22:50:39,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:50:39,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667421261] [2021-10-13 22:50:39,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667421261] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:39,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942101556] [2021-10-13 22:50:39,658 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:50:39,658 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:39,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:50:39,663 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:50:39,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-10-13 22:50:41,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:50:41,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 22:50:41,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:50:41,304 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 178 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 22:50:41,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942101556] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:41,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:50:41,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-10-13 22:50:41,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602779423] [2021-10-13 22:50:41,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 22:50:41,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:50:41,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 22:50:41,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-10-13 22:50:41,305 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:50:41,306 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 456 transitions, 18533 flow. Second operand has 19 states, 19 states have (on average 54.1578947368421) internal successors, (1029), 19 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:41,306 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:50:41,306 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:50:41,306 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:50:42,578 INFO L129 PetriNetUnfolder]: 370/2716 cut-off events. [2021-10-13 22:50:42,578 INFO L130 PetriNetUnfolder]: For 432826/433316 co-relation queries the response was YES. [2021-10-13 22:50:42,608 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26221 conditions, 2716 events. 370/2716 cut-off events. For 432826/433316 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 25000 event pairs, 0 based on Foata normal form. 175/2602 useless extension candidates. Maximal degree in co-relation 25974. Up to 495 conditions per place. [2021-10-13 22:50:42,626 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 104 selfloop transitions, 341 changer transitions 5/494 dead transitions. [2021-10-13 22:50:42,626 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 494 transitions, 23103 flow [2021-10-13 22:50:42,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-13 22:50:42,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-13 22:50:42,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1723 transitions. [2021-10-13 22:50:42,628 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8421309872922776 [2021-10-13 22:50:42,628 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1723 transitions. [2021-10-13 22:50:42,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1723 transitions. [2021-10-13 22:50:42,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:50:42,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1723 transitions. [2021-10-13 22:50:42,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 55.58064516129032) internal successors, (1723), 31 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:42,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 66.0) internal successors, (2112), 32 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:42,630 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 66.0) internal successors, (2112), 32 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:42,630 INFO L186 Difference]: Start difference. First operand has 537 places, 456 transitions, 18533 flow. Second operand 31 states and 1723 transitions. [2021-10-13 22:50:42,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 494 transitions, 23103 flow [2021-10-13 22:50:43,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 494 transitions, 22110 flow, removed 182 selfloop flow, removed 34 redundant places. [2021-10-13 22:50:43,801 INFO L242 Difference]: Finished difference. Result has 534 places, 459 transitions, 18649 flow [2021-10-13 22:50:43,802 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=17638, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=338, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=18649, PETRI_PLACES=534, PETRI_TRANSITIONS=459} [2021-10-13 22:50:43,802 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 468 predicate places. [2021-10-13 22:50:43,802 INFO L470 AbstractCegarLoop]: Abstraction has has 534 places, 459 transitions, 18649 flow [2021-10-13 22:50:43,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.1578947368421) internal successors, (1029), 19 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:43,802 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:50:43,802 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:50:43,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-10-13 22:50:44,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-10-13 22:50:44,023 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:50:44,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:50:44,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1943669190, now seen corresponding path program 50 times [2021-10-13 22:50:44,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:50:44,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440942971] [2021-10-13 22:50:44,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:50:44,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:50:44,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:50:44,211 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:44,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:50:44,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440942971] [2021-10-13 22:50:44,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440942971] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:44,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630932328] [2021-10-13 22:50:44,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:50:44,211 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:44,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:50:44,212 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:50:44,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-10-13 22:50:45,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:50:45,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:50:45,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 22:50:45,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:50:45,953 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:45,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630932328] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:45,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:50:45,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-10-13 22:50:45,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295511817] [2021-10-13 22:50:45,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 22:50:45,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:50:45,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 22:50:45,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-10-13 22:50:45,954 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:50:45,954 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 459 transitions, 18649 flow. Second operand has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:45,955 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:50:45,955 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:50:45,955 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:50:46,958 INFO L129 PetriNetUnfolder]: 374/2744 cut-off events. [2021-10-13 22:50:46,959 INFO L130 PetriNetUnfolder]: For 432222/432787 co-relation queries the response was YES. [2021-10-13 22:50:46,994 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26410 conditions, 2744 events. 374/2744 cut-off events. For 432222/432787 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 25223 event pairs, 0 based on Foata normal form. 68/2520 useless extension candidates. Maximal degree in co-relation 26165. Up to 602 conditions per place. [2021-10-13 22:50:47,014 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 384 selfloop transitions, 55 changer transitions 8/491 dead transitions. [2021-10-13 22:50:47,014 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 491 transitions, 22505 flow [2021-10-13 22:50:47,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 22:50:47,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-10-13 22:50:47,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1276 transitions. [2021-10-13 22:50:47,015 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8405797101449275 [2021-10-13 22:50:47,015 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1276 transitions. [2021-10-13 22:50:47,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1276 transitions. [2021-10-13 22:50:47,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:50:47,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1276 transitions. [2021-10-13 22:50:47,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 55.47826086956522) internal successors, (1276), 23 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:47,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 66.0) internal successors, (1584), 24 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:47,017 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 66.0) internal successors, (1584), 24 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:47,017 INFO L186 Difference]: Start difference. First operand has 534 places, 459 transitions, 18649 flow. Second operand 23 states and 1276 transitions. [2021-10-13 22:50:47,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 491 transitions, 22505 flow [2021-10-13 22:50:48,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 491 transitions, 21660 flow, removed 112 selfloop flow, removed 26 redundant places. [2021-10-13 22:50:48,149 INFO L242 Difference]: Finished difference. Result has 533 places, 461 transitions, 18236 flow [2021-10-13 22:50:48,149 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=17886, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=18236, PETRI_PLACES=533, PETRI_TRANSITIONS=461} [2021-10-13 22:50:48,149 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 467 predicate places. [2021-10-13 22:50:48,149 INFO L470 AbstractCegarLoop]: Abstraction has has 533 places, 461 transitions, 18236 flow [2021-10-13 22:50:48,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:48,150 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:50:48,150 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:50:48,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-10-13 22:50:48,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-10-13 22:50:48,351 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:50:48,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:50:48,351 INFO L82 PathProgramCache]: Analyzing trace with hash -966706734, now seen corresponding path program 51 times [2021-10-13 22:50:48,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:50:48,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906864683] [2021-10-13 22:50:48,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:50:48,351 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:50:48,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:50:48,586 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:48,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:50:48,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906864683] [2021-10-13 22:50:48,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906864683] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:48,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288759332] [2021-10-13 22:50:48,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:50:48,586 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:48,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:50:48,587 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:50:48,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-10-13 22:50:50,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-10-13 22:50:50,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:50:50,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 22:50:50,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:50:50,427 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:50,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288759332] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:50,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:50:50,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-10-13 22:50:50,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873763597] [2021-10-13 22:50:50,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:50:50,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:50:50,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:50:50,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:50:50,428 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:50:50,429 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 461 transitions, 18236 flow. Second operand has 21 states, 21 states have (on average 54.142857142857146) internal successors, (1137), 21 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:50,429 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:50:50,429 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:50:50,429 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:50:51,527 INFO L129 PetriNetUnfolder]: 376/2755 cut-off events. [2021-10-13 22:50:51,527 INFO L130 PetriNetUnfolder]: For 442313/442892 co-relation queries the response was YES. [2021-10-13 22:50:51,562 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26485 conditions, 2755 events. 376/2755 cut-off events. For 442313/442892 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 25152 event pairs, 0 based on Foata normal form. 84/2545 useless extension candidates. Maximal degree in co-relation 26237. Up to 517 conditions per place. [2021-10-13 22:50:51,581 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 336 selfloop transitions, 106 changer transitions 8/494 dead transitions. [2021-10-13 22:50:51,581 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 556 places, 494 transitions, 22228 flow [2021-10-13 22:50:51,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-13 22:50:51,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-10-13 22:50:51,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1496 transitions. [2021-10-13 22:50:51,582 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8395061728395061 [2021-10-13 22:50:51,582 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1496 transitions. [2021-10-13 22:50:51,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1496 transitions. [2021-10-13 22:50:51,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:50:51,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1496 transitions. [2021-10-13 22:50:51,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 55.407407407407405) internal successors, (1496), 27 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:51,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 66.0) internal successors, (1848), 28 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:51,584 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 66.0) internal successors, (1848), 28 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:51,584 INFO L186 Difference]: Start difference. First operand has 533 places, 461 transitions, 18236 flow. Second operand 27 states and 1496 transitions. [2021-10-13 22:50:51,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 556 places, 494 transitions, 22228 flow [2021-10-13 22:50:52,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 494 transitions, 21876 flow, removed 120 selfloop flow, removed 21 redundant places. [2021-10-13 22:50:52,863 INFO L242 Difference]: Finished difference. Result has 540 places, 463 transitions, 18452 flow [2021-10-13 22:50:52,864 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=17992, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=18452, PETRI_PLACES=540, PETRI_TRANSITIONS=463} [2021-10-13 22:50:52,864 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 474 predicate places. [2021-10-13 22:50:52,864 INFO L470 AbstractCegarLoop]: Abstraction has has 540 places, 463 transitions, 18452 flow [2021-10-13 22:50:52,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.142857142857146) internal successors, (1137), 21 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:52,864 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:50:52,864 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:50:52,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-10-13 22:50:53,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:53,065 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:50:53,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:50:53,065 INFO L82 PathProgramCache]: Analyzing trace with hash -2026492480, now seen corresponding path program 52 times [2021-10-13 22:50:53,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:50:53,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413669795] [2021-10-13 22:50:53,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:50:53,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:50:53,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:50:53,232 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:53,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:50:53,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413669795] [2021-10-13 22:50:53,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413669795] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:53,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370495767] [2021-10-13 22:50:53,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:50:53,233 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:53,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:50:53,233 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:50:53,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-10-13 22:50:54,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:50:54,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:50:54,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 22:50:54,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:50:55,078 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:55,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370495767] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:55,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:50:55,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-10-13 22:50:55,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59342533] [2021-10-13 22:50:55,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 22:50:55,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:50:55,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 22:50:55,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-10-13 22:50:55,079 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:50:55,080 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 463 transitions, 18452 flow. Second operand has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:55,080 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:50:55,080 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:50:55,080 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:50:56,110 INFO L129 PetriNetUnfolder]: 378/2773 cut-off events. [2021-10-13 22:50:56,111 INFO L130 PetriNetUnfolder]: For 448937/449513 co-relation queries the response was YES. [2021-10-13 22:50:56,158 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26792 conditions, 2773 events. 378/2773 cut-off events. For 448937/449513 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 25422 event pairs, 0 based on Foata normal form. 87/2564 useless extension candidates. Maximal degree in co-relation 26542. Up to 509 conditions per place. [2021-10-13 22:50:56,177 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 297 selfloop transitions, 147 changer transitions 8/496 dead transitions. [2021-10-13 22:50:56,177 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 496 transitions, 22560 flow [2021-10-13 22:50:56,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 22:50:56,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-10-13 22:50:56,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1441 transitions. [2021-10-13 22:50:56,178 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8397435897435898 [2021-10-13 22:50:56,178 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1441 transitions. [2021-10-13 22:50:56,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1441 transitions. [2021-10-13 22:50:56,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:50:56,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1441 transitions. [2021-10-13 22:50:56,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 55.42307692307692) internal successors, (1441), 26 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:56,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 66.0) internal successors, (1782), 27 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:56,180 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 66.0) internal successors, (1782), 27 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:56,180 INFO L186 Difference]: Start difference. First operand has 540 places, 463 transitions, 18452 flow. Second operand 26 states and 1441 transitions. [2021-10-13 22:50:56,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 496 transitions, 22560 flow [2021-10-13 22:50:57,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 496 transitions, 22120 flow, removed 122 selfloop flow, removed 24 redundant places. [2021-10-13 22:50:57,583 INFO L242 Difference]: Finished difference. Result has 543 places, 465 transitions, 18678 flow [2021-10-13 22:50:57,583 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=18128, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=18678, PETRI_PLACES=543, PETRI_TRANSITIONS=465} [2021-10-13 22:50:57,583 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 477 predicate places. [2021-10-13 22:50:57,583 INFO L470 AbstractCegarLoop]: Abstraction has has 543 places, 465 transitions, 18678 flow [2021-10-13 22:50:57,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:57,583 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:50:57,584 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:50:57,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-10-13 22:50:57,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:57,799 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:50:57,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:50:57,800 INFO L82 PathProgramCache]: Analyzing trace with hash 70570994, now seen corresponding path program 53 times [2021-10-13 22:50:57,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:50:57,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917161239] [2021-10-13 22:50:57,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:50:57,800 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:50:57,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:50:57,954 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:57,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:50:57,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917161239] [2021-10-13 22:50:57,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917161239] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:57,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405633375] [2021-10-13 22:50:57,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:50:57,954 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:57,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:50:57,955 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:50:57,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-10-13 22:50:59,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-10-13 22:50:59,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:50:59,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 22:50:59,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:50:59,892 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 4 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:59,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405633375] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:59,892 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:50:59,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-10-13 22:50:59,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021890610] [2021-10-13 22:50:59,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:50:59,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:50:59,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:50:59,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:50:59,893 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:50:59,894 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 543 places, 465 transitions, 18678 flow. Second operand has 21 states, 21 states have (on average 54.142857142857146) internal successors, (1137), 21 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:59,894 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:50:59,894 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:50:59,894 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:51:00,976 INFO L129 PetriNetUnfolder]: 382/2816 cut-off events. [2021-10-13 22:51:00,977 INFO L130 PetriNetUnfolder]: For 454682/455220 co-relation queries the response was YES. [2021-10-13 22:51:01,022 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27240 conditions, 2816 events. 382/2816 cut-off events. For 454682/455220 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 25850 event pairs, 0 based on Foata normal form. 103/2618 useless extension candidates. Maximal degree in co-relation 26988. Up to 517 conditions per place. [2021-10-13 22:51:01,041 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 258 selfloop transitions, 191 changer transitions 8/501 dead transitions. [2021-10-13 22:51:01,041 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 568 places, 501 transitions, 23037 flow [2021-10-13 22:51:01,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 22:51:01,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-10-13 22:51:01,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1608 transitions. [2021-10-13 22:51:01,042 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8401253918495298 [2021-10-13 22:51:01,042 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1608 transitions. [2021-10-13 22:51:01,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1608 transitions. [2021-10-13 22:51:01,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:51:01,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1608 transitions. [2021-10-13 22:51:01,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 55.44827586206897) internal successors, (1608), 29 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:01,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:01,045 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:01,045 INFO L186 Difference]: Start difference. First operand has 543 places, 465 transitions, 18678 flow. Second operand 29 states and 1608 transitions. [2021-10-13 22:51:01,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 568 places, 501 transitions, 23037 flow [2021-10-13 22:51:02,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 501 transitions, 22519 flow, removed 124 selfloop flow, removed 23 redundant places. [2021-10-13 22:51:02,311 INFO L242 Difference]: Finished difference. Result has 550 places, 469 transitions, 19065 flow [2021-10-13 22:51:02,311 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=18280, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=19065, PETRI_PLACES=550, PETRI_TRANSITIONS=469} [2021-10-13 22:51:02,311 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 484 predicate places. [2021-10-13 22:51:02,311 INFO L470 AbstractCegarLoop]: Abstraction has has 550 places, 469 transitions, 19065 flow [2021-10-13 22:51:02,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.142857142857146) internal successors, (1137), 21 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:02,312 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:51:02,312 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:51:02,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-10-13 22:51:02,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:51:02,527 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:51:02,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:51:02,528 INFO L82 PathProgramCache]: Analyzing trace with hash -105470152, now seen corresponding path program 54 times [2021-10-13 22:51:02,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:51:02,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810338985] [2021-10-13 22:51:02,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:51:02,528 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:51:02,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:51:02,656 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:02,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:51:02,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810338985] [2021-10-13 22:51:02,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810338985] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:02,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841682601] [2021-10-13 22:51:02,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:51:02,656 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:51:02,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:51:02,657 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:51:02,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-10-13 22:51:04,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-10-13 22:51:04,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:51:04,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 22:51:04,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:51:04,416 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:04,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841682601] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:04,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:51:04,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-10-13 22:51:04,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717254288] [2021-10-13 22:51:04,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 22:51:04,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:51:04,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 22:51:04,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-10-13 22:51:04,418 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:51:04,418 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 469 transitions, 19065 flow. Second operand has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:04,418 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:51:04,419 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:51:04,419 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:51:05,571 INFO L129 PetriNetUnfolder]: 384/2827 cut-off events. [2021-10-13 22:51:05,571 INFO L130 PetriNetUnfolder]: For 457149/457725 co-relation queries the response was YES. [2021-10-13 22:51:05,616 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27490 conditions, 2827 events. 384/2827 cut-off events. For 457149/457725 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 25897 event pairs, 0 based on Foata normal form. 159/2684 useless extension candidates. Maximal degree in co-relation 27236. Up to 521 conditions per place. [2021-10-13 22:51:05,635 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 123 selfloop transitions, 333 changer transitions 8/508 dead transitions. [2021-10-13 22:51:05,635 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 578 places, 508 transitions, 23857 flow [2021-10-13 22:51:05,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 22:51:05,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-10-13 22:51:05,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1777 transitions. [2021-10-13 22:51:05,636 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8413825757575758 [2021-10-13 22:51:05,636 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1777 transitions. [2021-10-13 22:51:05,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1777 transitions. [2021-10-13 22:51:05,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:51:05,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1777 transitions. [2021-10-13 22:51:05,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.53125) internal successors, (1777), 32 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:05,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 66.0) internal successors, (2178), 33 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:05,639 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 66.0) internal successors, (2178), 33 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:05,639 INFO L186 Difference]: Start difference. First operand has 550 places, 469 transitions, 19065 flow. Second operand 32 states and 1777 transitions. [2021-10-13 22:51:05,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 578 places, 508 transitions, 23857 flow [2021-10-13 22:51:06,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 508 transitions, 23231 flow, removed 138 selfloop flow, removed 26 redundant places. [2021-10-13 22:51:06,931 INFO L242 Difference]: Finished difference. Result has 557 places, 471 transitions, 19528 flow [2021-10-13 22:51:06,931 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=18579, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=331, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=19528, PETRI_PLACES=557, PETRI_TRANSITIONS=471} [2021-10-13 22:51:06,931 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 491 predicate places. [2021-10-13 22:51:06,932 INFO L470 AbstractCegarLoop]: Abstraction has has 557 places, 471 transitions, 19528 flow [2021-10-13 22:51:06,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:06,932 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:51:06,932 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:51:06,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-10-13 22:51:07,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-10-13 22:51:07,153 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:51:07,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:51:07,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1230669308, now seen corresponding path program 55 times [2021-10-13 22:51:07,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:51:07,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139699835] [2021-10-13 22:51:07,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:51:07,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:51:07,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:51:07,298 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:07,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:51:07,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139699835] [2021-10-13 22:51:07,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139699835] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:07,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120425212] [2021-10-13 22:51:07,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:51:07,299 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:51:07,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:51:07,299 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:51:07,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-10-13 22:51:08,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:51:08,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 22:51:08,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:51:09,101 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:09,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120425212] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:09,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:51:09,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-10-13 22:51:09,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641530868] [2021-10-13 22:51:09,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 22:51:09,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:51:09,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 22:51:09,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-10-13 22:51:09,102 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:51:09,103 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 471 transitions, 19528 flow. Second operand has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:09,103 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:51:09,103 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:51:09,103 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:51:10,326 INFO L129 PetriNetUnfolder]: 390/2888 cut-off events. [2021-10-13 22:51:10,326 INFO L130 PetriNetUnfolder]: For 466834/467372 co-relation queries the response was YES. [2021-10-13 22:51:10,370 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28229 conditions, 2888 events. 390/2888 cut-off events. For 466834/467372 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 26557 event pairs, 0 based on Foata normal form. 163/2743 useless extension candidates. Maximal degree in co-relation 27973. Up to 533 conditions per place. [2021-10-13 22:51:10,389 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 109 selfloop transitions, 356 changer transitions 8/517 dead transitions. [2021-10-13 22:51:10,389 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 587 places, 517 transitions, 24900 flow [2021-10-13 22:51:10,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-13 22:51:10,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-10-13 22:51:10,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1889 transitions. [2021-10-13 22:51:10,391 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8418003565062389 [2021-10-13 22:51:10,391 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1889 transitions. [2021-10-13 22:51:10,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1889 transitions. [2021-10-13 22:51:10,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:51:10,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1889 transitions. [2021-10-13 22:51:10,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 55.55882352941177) internal successors, (1889), 34 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:10,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 66.0) internal successors, (2310), 35 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:10,393 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 66.0) internal successors, (2310), 35 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:10,394 INFO L186 Difference]: Start difference. First operand has 557 places, 471 transitions, 19528 flow. Second operand 34 states and 1889 transitions. [2021-10-13 22:51:10,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 587 places, 517 transitions, 24900 flow [2021-10-13 22:51:11,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 560 places, 517 transitions, 24069 flow, removed 146 selfloop flow, removed 27 redundant places. [2021-10-13 22:51:11,788 INFO L242 Difference]: Finished difference. Result has 567 places, 478 transitions, 20239 flow [2021-10-13 22:51:11,789 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=18849, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=349, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=20239, PETRI_PLACES=567, PETRI_TRANSITIONS=478} [2021-10-13 22:51:11,789 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 501 predicate places. [2021-10-13 22:51:11,789 INFO L470 AbstractCegarLoop]: Abstraction has has 567 places, 478 transitions, 20239 flow [2021-10-13 22:51:11,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:11,789 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:51:11,789 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:51:11,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-10-13 22:51:12,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-10-13 22:51:12,003 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:51:12,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:51:12,004 INFO L82 PathProgramCache]: Analyzing trace with hash 529183286, now seen corresponding path program 56 times [2021-10-13 22:51:12,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:51:12,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525104117] [2021-10-13 22:51:12,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:51:12,004 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:51:12,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:51:12,149 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:12,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:51:12,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525104117] [2021-10-13 22:51:12,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525104117] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:12,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123504205] [2021-10-13 22:51:12,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:51:12,149 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:51:12,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:51:12,151 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:51:12,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-10-13 22:51:13,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:51:13,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:51:13,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 22:51:13,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:51:14,007 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:14,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123504205] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:14,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:51:14,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-10-13 22:51:14,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208781961] [2021-10-13 22:51:14,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:51:14,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:51:14,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:51:14,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:51:14,009 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:51:14,009 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 567 places, 478 transitions, 20239 flow. Second operand has 21 states, 21 states have (on average 54.142857142857146) internal successors, (1137), 21 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:14,009 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:51:14,010 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:51:14,010 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:51:15,404 INFO L129 PetriNetUnfolder]: 393/2901 cut-off events. [2021-10-13 22:51:15,404 INFO L130 PetriNetUnfolder]: For 480836/481439 co-relation queries the response was YES. [2021-10-13 22:51:15,448 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28736 conditions, 2901 events. 393/2901 cut-off events. For 480836/481439 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 26720 event pairs, 0 based on Foata normal form. 182/2775 useless extension candidates. Maximal degree in co-relation 28476. Up to 539 conditions per place. [2021-10-13 22:51:15,468 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 88 selfloop transitions, 382 changer transitions 8/522 dead transitions. [2021-10-13 22:51:15,468 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 600 places, 522 transitions, 25587 flow [2021-10-13 22:51:15,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-13 22:51:15,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-10-13 22:51:15,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2056 transitions. [2021-10-13 22:51:15,469 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8419328419328419 [2021-10-13 22:51:15,469 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2056 transitions. [2021-10-13 22:51:15,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2056 transitions. [2021-10-13 22:51:15,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:51:15,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2056 transitions. [2021-10-13 22:51:15,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 55.567567567567565) internal successors, (2056), 37 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:15,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 66.0) internal successors, (2508), 38 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:15,472 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 66.0) internal successors, (2508), 38 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:15,472 INFO L186 Difference]: Start difference. First operand has 567 places, 478 transitions, 20239 flow. Second operand 37 states and 2056 transitions. [2021-10-13 22:51:15,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 600 places, 522 transitions, 25587 flow [2021-10-13 22:51:17,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 571 places, 522 transitions, 24569 flow, removed 203 selfloop flow, removed 29 redundant places. [2021-10-13 22:51:17,042 INFO L242 Difference]: Finished difference. Result has 577 places, 483 transitions, 20598 flow [2021-10-13 22:51:17,043 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=19339, PETRI_DIFFERENCE_MINUEND_PLACES=535, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=377, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=20598, PETRI_PLACES=577, PETRI_TRANSITIONS=483} [2021-10-13 22:51:17,043 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 511 predicate places. [2021-10-13 22:51:17,043 INFO L470 AbstractCegarLoop]: Abstraction has has 577 places, 483 transitions, 20598 flow [2021-10-13 22:51:17,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.142857142857146) internal successors, (1137), 21 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:17,043 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:51:17,043 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:51:17,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-10-13 22:51:17,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:51:17,244 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:51:17,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:51:17,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1170663302, now seen corresponding path program 57 times [2021-10-13 22:51:17,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:51:17,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166579609] [2021-10-13 22:51:17,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:51:17,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:51:17,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:51:17,365 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:17,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:51:17,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166579609] [2021-10-13 22:51:17,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166579609] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:17,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333011247] [2021-10-13 22:51:17,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:51:17,366 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:51:17,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:51:17,367 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:51:17,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-10-13 22:51:18,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-10-13 22:51:18,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:51:18,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 22:51:18,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:51:19,205 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:19,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333011247] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:19,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:51:19,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-10-13 22:51:19,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784343273] [2021-10-13 22:51:19,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 22:51:19,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:51:19,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 22:51:19,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-10-13 22:51:19,206 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:51:19,207 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 577 places, 483 transitions, 20598 flow. Second operand has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:19,207 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:51:19,207 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:51:19,207 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:51:20,546 INFO L129 PetriNetUnfolder]: 410/2994 cut-off events. [2021-10-13 22:51:20,546 INFO L130 PetriNetUnfolder]: For 524186/524844 co-relation queries the response was YES. [2021-10-13 22:51:20,592 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30473 conditions, 2994 events. 410/2994 cut-off events. For 524186/524844 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 27537 event pairs, 0 based on Foata normal form. 188/2866 useless extension candidates. Maximal degree in co-relation 30210. Up to 562 conditions per place. [2021-10-13 22:51:20,613 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 96 selfloop transitions, 387 changer transitions 8/535 dead transitions. [2021-10-13 22:51:20,613 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 609 places, 535 transitions, 26594 flow [2021-10-13 22:51:20,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-13 22:51:20,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-10-13 22:51:20,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2005 transitions. [2021-10-13 22:51:20,614 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8438552188552189 [2021-10-13 22:51:20,615 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2005 transitions. [2021-10-13 22:51:20,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2005 transitions. [2021-10-13 22:51:20,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:51:20,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2005 transitions. [2021-10-13 22:51:20,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 55.69444444444444) internal successors, (2005), 36 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:20,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:20,617 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:20,617 INFO L186 Difference]: Start difference. First operand has 577 places, 483 transitions, 20598 flow. Second operand 36 states and 2005 transitions. [2021-10-13 22:51:20,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 609 places, 535 transitions, 26594 flow [2021-10-13 22:51:22,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 579 places, 535 transitions, 25574 flow, removed 233 selfloop flow, removed 30 redundant places. [2021-10-13 22:51:22,234 INFO L242 Difference]: Finished difference. Result has 586 places, 491 transitions, 21353 flow [2021-10-13 22:51:22,235 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=19764, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=379, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=21353, PETRI_PLACES=586, PETRI_TRANSITIONS=491} [2021-10-13 22:51:22,235 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 520 predicate places. [2021-10-13 22:51:22,235 INFO L470 AbstractCegarLoop]: Abstraction has has 586 places, 491 transitions, 21353 flow [2021-10-13 22:51:22,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:22,235 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:51:22,235 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:51:22,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-10-13 22:51:22,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:51:22,459 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:51:22,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:51:22,459 INFO L82 PathProgramCache]: Analyzing trace with hash 707029866, now seen corresponding path program 58 times [2021-10-13 22:51:22,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:51:22,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275352050] [2021-10-13 22:51:22,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:51:22,459 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:51:22,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:51:22,580 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:22,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:51:22,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275352050] [2021-10-13 22:51:22,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275352050] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:22,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459522212] [2021-10-13 22:51:22,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:51:22,582 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:51:22,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:51:22,583 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:51:22,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-10-13 22:51:24,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:51:24,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:51:24,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 22:51:24,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:51:24,477 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:24,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459522212] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:24,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:51:24,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-10-13 22:51:24,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577146433] [2021-10-13 22:51:24,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 22:51:24,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:51:24,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 22:51:24,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-10-13 22:51:24,478 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:51:24,479 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 586 places, 491 transitions, 21353 flow. Second operand has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:24,479 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:51:24,479 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:51:24,479 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:51:25,927 INFO L129 PetriNetUnfolder]: 405/2979 cut-off events. [2021-10-13 22:51:25,927 INFO L130 PetriNetUnfolder]: For 546270/546989 co-relation queries the response was YES. [2021-10-13 22:51:25,972 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30726 conditions, 2979 events. 405/2979 cut-off events. For 546270/546989 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 27465 event pairs, 0 based on Foata normal form. 201/2865 useless extension candidates. Maximal degree in co-relation 30459. Up to 557 conditions per place. [2021-10-13 22:51:25,994 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 89 selfloop transitions, 394 changer transitions 11/538 dead transitions. [2021-10-13 22:51:25,994 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 620 places, 538 transitions, 27364 flow [2021-10-13 22:51:25,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-13 22:51:25,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-10-13 22:51:25,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2113 transitions. [2021-10-13 22:51:25,995 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8425039872408293 [2021-10-13 22:51:25,995 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2113 transitions. [2021-10-13 22:51:25,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2113 transitions. [2021-10-13 22:51:25,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:51:25,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2113 transitions. [2021-10-13 22:51:25,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 55.60526315789474) internal successors, (2113), 38 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:25,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 66.0) internal successors, (2574), 39 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:25,998 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 66.0) internal successors, (2574), 39 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:25,998 INFO L186 Difference]: Start difference. First operand has 586 places, 491 transitions, 21353 flow. Second operand 38 states and 2113 transitions. [2021-10-13 22:51:25,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 620 places, 538 transitions, 27364 flow [2021-10-13 22:51:27,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 589 places, 538 transitions, 25956 flow, removed 364 selfloop flow, removed 31 redundant places. [2021-10-13 22:51:27,881 INFO L242 Difference]: Finished difference. Result has 595 places, 494 transitions, 21483 flow [2021-10-13 22:51:27,881 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=20307, PETRI_DIFFERENCE_MINUEND_PLACES=552, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=391, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=21483, PETRI_PLACES=595, PETRI_TRANSITIONS=494} [2021-10-13 22:51:27,881 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 529 predicate places. [2021-10-13 22:51:27,881 INFO L470 AbstractCegarLoop]: Abstraction has has 595 places, 494 transitions, 21483 flow [2021-10-13 22:51:27,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:27,882 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:51:27,882 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:51:27,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-10-13 22:51:28,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-10-13 22:51:28,082 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:51:28,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:51:28,083 INFO L82 PathProgramCache]: Analyzing trace with hash 269427497, now seen corresponding path program 59 times [2021-10-13 22:51:28,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:51:28,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280054728] [2021-10-13 22:51:28,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:51:28,083 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:51:28,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:51:28,255 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:28,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:51:28,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280054728] [2021-10-13 22:51:28,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280054728] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:28,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297793283] [2021-10-13 22:51:28,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:51:28,255 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:51:28,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:51:28,256 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:51:28,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-10-13 22:51:29,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-10-13 22:51:29,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:51:29,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 22:51:29,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:51:30,302 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:30,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297793283] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:30,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:51:30,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-10-13 22:51:30,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249760515] [2021-10-13 22:51:30,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:51:30,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:51:30,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:51:30,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:51:30,314 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:51:30,315 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 595 places, 494 transitions, 21483 flow. Second operand has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:30,315 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:51:30,315 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:51:30,315 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:51:31,423 INFO L129 PetriNetUnfolder]: 405/2979 cut-off events. [2021-10-13 22:51:31,423 INFO L130 PetriNetUnfolder]: For 534102/534748 co-relation queries the response was YES. [2021-10-13 22:51:31,472 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30497 conditions, 2979 events. 405/2979 cut-off events. For 534102/534748 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 27461 event pairs, 0 based on Foata normal form. 76/2738 useless extension candidates. Maximal degree in co-relation 30227. Up to 709 conditions per place. [2021-10-13 22:51:31,492 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 442 selfloop transitions, 29 changer transitions 8/523 dead transitions. [2021-10-13 22:51:31,492 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 523 transitions, 25575 flow [2021-10-13 22:51:31,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 22:51:31,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-10-13 22:51:31,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1275 transitions. [2021-10-13 22:51:31,496 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8399209486166008 [2021-10-13 22:51:31,496 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1275 transitions. [2021-10-13 22:51:31,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1275 transitions. [2021-10-13 22:51:31,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:51:31,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1275 transitions. [2021-10-13 22:51:31,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 55.43478260869565) internal successors, (1275), 23 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:31,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 66.0) internal successors, (1584), 24 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:31,498 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 66.0) internal successors, (1584), 24 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:31,498 INFO L186 Difference]: Start difference. First operand has 595 places, 494 transitions, 21483 flow. Second operand 23 states and 1275 transitions. [2021-10-13 22:51:31,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 523 transitions, 25575 flow [2021-10-13 22:51:33,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 579 places, 523 transitions, 24553 flow, removed 141 selfloop flow, removed 35 redundant places. [2021-10-13 22:51:33,345 INFO L242 Difference]: Finished difference. Result has 584 places, 496 transitions, 20799 flow [2021-10-13 22:51:33,345 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=20487, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=20799, PETRI_PLACES=584, PETRI_TRANSITIONS=496} [2021-10-13 22:51:33,345 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 518 predicate places. [2021-10-13 22:51:33,345 INFO L470 AbstractCegarLoop]: Abstraction has has 584 places, 496 transitions, 20799 flow [2021-10-13 22:51:33,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:33,345 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:51:33,345 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:51:33,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-10-13 22:51:33,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-10-13 22:51:33,548 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:51:33,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:51:33,548 INFO L82 PathProgramCache]: Analyzing trace with hash -378950563, now seen corresponding path program 60 times [2021-10-13 22:51:33,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:51:33,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487998993] [2021-10-13 22:51:33,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:51:33,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:51:33,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:51:33,726 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:33,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:51:33,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487998993] [2021-10-13 22:51:33,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487998993] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:33,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070554132] [2021-10-13 22:51:33,726 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:51:33,726 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:51:33,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:51:33,727 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:51:33,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-10-13 22:51:35,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-10-13 22:51:35,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:51:35,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 22:51:35,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:51:35,856 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:35,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070554132] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:35,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:51:35,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-10-13 22:51:35,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368225164] [2021-10-13 22:51:35,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:51:35,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:51:35,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:51:35,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:51:35,858 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:51:35,858 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 584 places, 496 transitions, 20799 flow. Second operand has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:35,858 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:51:35,858 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:51:35,858 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:51:37,029 INFO L129 PetriNetUnfolder]: 407/3004 cut-off events. [2021-10-13 22:51:37,029 INFO L130 PetriNetUnfolder]: For 560529/561144 co-relation queries the response was YES. [2021-10-13 22:51:37,081 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30738 conditions, 3004 events. 407/3004 cut-off events. For 560529/561144 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 27612 event pairs, 0 based on Foata normal form. 80/2764 useless extension candidates. Maximal degree in co-relation 30467. Up to 632 conditions per place. [2021-10-13 22:51:37,101 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 403 selfloop transitions, 72 changer transitions 8/527 dead transitions. [2021-10-13 22:51:37,101 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 607 places, 527 transitions, 25221 flow [2021-10-13 22:51:37,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-13 22:51:37,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-10-13 22:51:37,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1498 transitions. [2021-10-13 22:51:37,103 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8406285072951739 [2021-10-13 22:51:37,103 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1498 transitions. [2021-10-13 22:51:37,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1498 transitions. [2021-10-13 22:51:37,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:51:37,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1498 transitions. [2021-10-13 22:51:37,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 55.48148148148148) internal successors, (1498), 27 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:37,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 66.0) internal successors, (1848), 28 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:37,106 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 66.0) internal successors, (1848), 28 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:37,106 INFO L186 Difference]: Start difference. First operand has 584 places, 496 transitions, 20799 flow. Second operand 27 states and 1498 transitions. [2021-10-13 22:51:37,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 607 places, 527 transitions, 25221 flow [2021-10-13 22:51:39,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 587 places, 527 transitions, 24863 flow, removed 152 selfloop flow, removed 20 redundant places. [2021-10-13 22:51:39,187 INFO L242 Difference]: Finished difference. Result has 592 places, 498 transitions, 20990 flow [2021-10-13 22:51:39,188 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=20589, PETRI_DIFFERENCE_MINUEND_PLACES=561, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=20990, PETRI_PLACES=592, PETRI_TRANSITIONS=498} [2021-10-13 22:51:39,188 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 526 predicate places. [2021-10-13 22:51:39,188 INFO L470 AbstractCegarLoop]: Abstraction has has 592 places, 498 transitions, 20990 flow [2021-10-13 22:51:39,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:39,188 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:51:39,188 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:51:39,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-10-13 22:51:39,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:51:39,389 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:51:39,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:51:39,389 INFO L82 PathProgramCache]: Analyzing trace with hash 210161853, now seen corresponding path program 61 times [2021-10-13 22:51:39,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:51:39,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111467486] [2021-10-13 22:51:39,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:51:39,390 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:51:39,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:51:39,722 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:39,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:51:39,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111467486] [2021-10-13 22:51:39,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111467486] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:39,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634092854] [2021-10-13 22:51:39,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:51:39,723 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:51:39,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:51:39,723 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:51:39,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-10-13 22:51:41,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:51:41,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 22:51:41,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:51:41,856 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:41,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634092854] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:41,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:51:41,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-10-13 22:51:41,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906667743] [2021-10-13 22:51:41,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:51:41,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:51:41,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:51:41,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:51:41,857 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:51:41,858 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 498 transitions, 20990 flow. Second operand has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:41,858 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:51:41,858 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:51:41,858 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:51:43,054 INFO L129 PetriNetUnfolder]: 411/3033 cut-off events. [2021-10-13 22:51:43,055 INFO L130 PetriNetUnfolder]: For 560793/561443 co-relation queries the response was YES. [2021-10-13 22:51:43,108 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31073 conditions, 3033 events. 411/3033 cut-off events. For 560793/561443 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 27887 event pairs, 0 based on Foata normal form. 90/2800 useless extension candidates. Maximal degree in co-relation 30800. Up to 565 conditions per place. [2021-10-13 22:51:43,130 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 342 selfloop transitions, 141 changer transitions 8/535 dead transitions. [2021-10-13 22:51:43,130 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 618 places, 535 transitions, 25811 flow [2021-10-13 22:51:43,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 22:51:43,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-10-13 22:51:43,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1663 transitions. [2021-10-13 22:51:43,131 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8398989898989899 [2021-10-13 22:51:43,132 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1663 transitions. [2021-10-13 22:51:43,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1663 transitions. [2021-10-13 22:51:43,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:51:43,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1663 transitions. [2021-10-13 22:51:43,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 55.43333333333333) internal successors, (1663), 30 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:43,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:43,134 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:43,134 INFO L186 Difference]: Start difference. First operand has 592 places, 498 transitions, 20990 flow. Second operand 30 states and 1663 transitions. [2021-10-13 22:51:43,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 618 places, 535 transitions, 25811 flow [2021-10-13 22:51:45,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 594 places, 535 transitions, 25408 flow, removed 134 selfloop flow, removed 24 redundant places. [2021-10-13 22:51:45,342 INFO L242 Difference]: Finished difference. Result has 601 places, 502 transitions, 21448 flow [2021-10-13 22:51:45,342 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=20711, PETRI_DIFFERENCE_MINUEND_PLACES=565, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=21448, PETRI_PLACES=601, PETRI_TRANSITIONS=502} [2021-10-13 22:51:45,342 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 535 predicate places. [2021-10-13 22:51:45,342 INFO L470 AbstractCegarLoop]: Abstraction has has 601 places, 502 transitions, 21448 flow [2021-10-13 22:51:45,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:45,343 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:51:45,343 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:51:45,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-10-13 22:51:45,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-10-13 22:51:45,543 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:51:45,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:51:45,544 INFO L82 PathProgramCache]: Analyzing trace with hash -2080562621, now seen corresponding path program 62 times [2021-10-13 22:51:45,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:51:45,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471215100] [2021-10-13 22:51:45,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:51:45,544 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:51:45,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:51:45,707 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:45,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:51:45,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471215100] [2021-10-13 22:51:45,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471215100] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:45,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013844727] [2021-10-13 22:51:45,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:51:45,708 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:51:45,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:51:45,719 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:51:45,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-10-13 22:51:47,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:51:47,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:51:47,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 22:51:47,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:51:47,971 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:47,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013844727] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:47,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:51:47,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-10-13 22:51:47,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180961253] [2021-10-13 22:51:47,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:51:47,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:51:47,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:51:47,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:51:47,972 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:51:47,973 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 601 places, 502 transitions, 21448 flow. Second operand has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:47,973 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:51:47,973 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:51:47,973 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:51:49,212 INFO L129 PetriNetUnfolder]: 413/3058 cut-off events. [2021-10-13 22:51:49,212 INFO L130 PetriNetUnfolder]: For 564968/565578 co-relation queries the response was YES. [2021-10-13 22:51:49,267 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31369 conditions, 3058 events. 413/3058 cut-off events. For 564968/565578 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 28143 event pairs, 0 based on Foata normal form. 124/2856 useless extension candidates. Maximal degree in co-relation 31091. Up to 569 conditions per place. [2021-10-13 22:51:49,289 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 254 selfloop transitions, 231 changer transitions 8/537 dead transitions. [2021-10-13 22:51:49,289 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 629 places, 537 transitions, 26334 flow [2021-10-13 22:51:49,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 22:51:49,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-10-13 22:51:49,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1775 transitions. [2021-10-13 22:51:49,290 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8404356060606061 [2021-10-13 22:51:49,290 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1775 transitions. [2021-10-13 22:51:49,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1775 transitions. [2021-10-13 22:51:49,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:51:49,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1775 transitions. [2021-10-13 22:51:49,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.46875) internal successors, (1775), 32 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:49,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 66.0) internal successors, (2178), 33 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:49,293 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 66.0) internal successors, (2178), 33 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:49,293 INFO L186 Difference]: Start difference. First operand has 601 places, 502 transitions, 21448 flow. Second operand 32 states and 1775 transitions. [2021-10-13 22:51:49,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 629 places, 537 transitions, 26334 flow [2021-10-13 22:51:51,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 604 places, 537 transitions, 25819 flow, removed 138 selfloop flow, removed 25 redundant places. [2021-10-13 22:51:51,700 INFO L242 Difference]: Finished difference. Result has 609 places, 504 transitions, 21806 flow [2021-10-13 22:51:51,700 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=21065, PETRI_DIFFERENCE_MINUEND_PLACES=573, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=21806, PETRI_PLACES=609, PETRI_TRANSITIONS=504} [2021-10-13 22:51:51,700 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 543 predicate places. [2021-10-13 22:51:51,701 INFO L470 AbstractCegarLoop]: Abstraction has has 609 places, 504 transitions, 21806 flow [2021-10-13 22:51:51,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:51,701 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:51:51,701 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:51:51,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-10-13 22:51:51,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:51:51,901 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:51:51,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:51:51,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1092886429, now seen corresponding path program 63 times [2021-10-13 22:51:51,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:51:51,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541584402] [2021-10-13 22:51:51,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:51:51,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:51:51,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:51:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:52,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:51:52,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541584402] [2021-10-13 22:51:52,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541584402] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:52,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922370479] [2021-10-13 22:51:52,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:51:52,048 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:51:52,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:51:52,049 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:51:52,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-10-13 22:51:53,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-10-13 22:51:53,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:51:53,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 22:51:53,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:51:54,249 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:54,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922370479] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:54,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:51:54,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-10-13 22:51:54,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348803616] [2021-10-13 22:51:54,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 22:51:54,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:51:54,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 22:51:54,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-10-13 22:51:54,251 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:51:54,251 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 609 places, 504 transitions, 21806 flow. Second operand has 22 states, 22 states have (on average 54.13636363636363) internal successors, (1191), 22 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:54,251 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:51:54,251 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:51:54,251 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:51:55,751 INFO L129 PetriNetUnfolder]: 419/3098 cut-off events. [2021-10-13 22:51:55,751 INFO L130 PetriNetUnfolder]: For 576900/577552 co-relation queries the response was YES. [2021-10-13 22:51:55,822 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32055 conditions, 3098 events. 419/3098 cut-off events. For 576900/577552 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 28582 event pairs, 0 based on Foata normal form. 188/2957 useless extension candidates. Maximal degree in co-relation 31775. Up to 581 conditions per place. [2021-10-13 22:51:55,844 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 123 selfloop transitions, 375 changer transitions 8/550 dead transitions. [2021-10-13 22:51:55,844 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 644 places, 550 transitions, 27873 flow [2021-10-13 22:51:55,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-13 22:51:55,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-10-13 22:51:55,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2167 transitions. [2021-10-13 22:51:55,846 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8418803418803419 [2021-10-13 22:51:55,846 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2167 transitions. [2021-10-13 22:51:55,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2167 transitions. [2021-10-13 22:51:55,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:51:55,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2167 transitions. [2021-10-13 22:51:55,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 55.56410256410256) internal successors, (2167), 39 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:55,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 66.0) internal successors, (2640), 40 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:55,849 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 66.0) internal successors, (2640), 40 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:55,849 INFO L186 Difference]: Start difference. First operand has 609 places, 504 transitions, 21806 flow. Second operand 39 states and 2167 transitions. [2021-10-13 22:51:55,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 644 places, 550 transitions, 27873 flow [2021-10-13 22:51:58,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 615 places, 550 transitions, 27130 flow, removed 156 selfloop flow, removed 29 redundant places. [2021-10-13 22:51:58,150 INFO L242 Difference]: Finished difference. Result has 621 places, 511 transitions, 22628 flow [2021-10-13 22:51:58,151 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=21227, PETRI_DIFFERENCE_MINUEND_PLACES=577, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=368, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=22628, PETRI_PLACES=621, PETRI_TRANSITIONS=511} [2021-10-13 22:51:58,151 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 555 predicate places. [2021-10-13 22:51:58,151 INFO L470 AbstractCegarLoop]: Abstraction has has 621 places, 511 transitions, 22628 flow [2021-10-13 22:51:58,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.13636363636363) internal successors, (1191), 22 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:58,151 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:51:58,152 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:51:58,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-10-13 22:51:58,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:51:58,358 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:51:58,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:51:58,358 INFO L82 PathProgramCache]: Analyzing trace with hash -610622169, now seen corresponding path program 64 times [2021-10-13 22:51:58,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:51:58,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721799424] [2021-10-13 22:51:58,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:51:58,359 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:51:58,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:51:58,574 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:58,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:51:58,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721799424] [2021-10-13 22:51:58,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721799424] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:58,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444941653] [2021-10-13 22:51:58,575 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:51:58,575 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:51:58,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:51:58,575 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:51:58,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-10-13 22:52:00,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:52:00,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:52:00,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 22:52:00,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:52:00,693 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:52:00,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444941653] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:52:00,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:52:00,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-10-13 22:52:00,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890044376] [2021-10-13 22:52:00,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 22:52:00,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:52:00,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 22:52:00,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-10-13 22:52:00,695 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:52:00,696 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 511 transitions, 22628 flow. Second operand has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:00,696 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:52:00,696 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:52:00,696 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:52:02,240 INFO L129 PetriNetUnfolder]: 431/3167 cut-off events. [2021-10-13 22:52:02,241 INFO L130 PetriNetUnfolder]: For 609123/609794 co-relation queries the response was YES. [2021-10-13 22:52:02,298 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33519 conditions, 3167 events. 431/3167 cut-off events. For 609123/609794 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 29232 event pairs, 0 based on Foata normal form. 200/3031 useless extension candidates. Maximal degree in co-relation 33236. Up to 599 conditions per place. [2021-10-13 22:52:02,320 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 114 selfloop transitions, 396 changer transitions 14/568 dead transitions. [2021-10-13 22:52:02,320 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 661 places, 568 transitions, 30134 flow [2021-10-13 22:52:02,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-13 22:52:02,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-10-13 22:52:02,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2448 transitions. [2021-10-13 22:52:02,322 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8429752066115702 [2021-10-13 22:52:02,322 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2448 transitions. [2021-10-13 22:52:02,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2448 transitions. [2021-10-13 22:52:02,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:52:02,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2448 transitions. [2021-10-13 22:52:02,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 55.63636363636363) internal successors, (2448), 44 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:02,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 66.0) internal successors, (2970), 45 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:02,325 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 66.0) internal successors, (2970), 45 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:02,325 INFO L186 Difference]: Start difference. First operand has 621 places, 511 transitions, 22628 flow. Second operand 44 states and 2448 transitions. [2021-10-13 22:52:02,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 661 places, 568 transitions, 30134 flow [2021-10-13 22:52:04,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 628 places, 568 transitions, 29002 flow, removed 254 selfloop flow, removed 33 redundant places. [2021-10-13 22:52:04,667 INFO L242 Difference]: Finished difference. Result has 639 places, 521 transitions, 23598 flow [2021-10-13 22:52:04,668 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=21654, PETRI_DIFFERENCE_MINUEND_PLACES=585, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=387, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=23598, PETRI_PLACES=639, PETRI_TRANSITIONS=521} [2021-10-13 22:52:04,668 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 573 predicate places. [2021-10-13 22:52:04,668 INFO L470 AbstractCegarLoop]: Abstraction has has 639 places, 521 transitions, 23598 flow [2021-10-13 22:52:04,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:04,668 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:52:04,668 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:52:04,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-10-13 22:52:04,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-10-13 22:52:04,883 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:52:04,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:52:04,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1582560447, now seen corresponding path program 65 times [2021-10-13 22:52:04,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:52:04,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840656371] [2021-10-13 22:52:04,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:52:04,884 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:52:04,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:52:05,069 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:52:05,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:52:05,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840656371] [2021-10-13 22:52:05,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840656371] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:52:05,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358934559] [2021-10-13 22:52:05,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:52:05,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:52:05,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:52:05,070 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:52:05,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-10-13 22:52:06,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-10-13 22:52:06,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:52:06,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 22:52:06,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:52:07,347 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:52:07,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358934559] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:52:07,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:52:07,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-10-13 22:52:07,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154315161] [2021-10-13 22:52:07,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 22:52:07,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:52:07,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 22:52:07,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-10-13 22:52:07,349 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:52:07,349 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 639 places, 521 transitions, 23598 flow. Second operand has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:07,349 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:52:07,349 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:52:07,349 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:52:08,690 INFO L129 PetriNetUnfolder]: 429/3172 cut-off events. [2021-10-13 22:52:08,690 INFO L130 PetriNetUnfolder]: For 706019/706706 co-relation queries the response was YES. [2021-10-13 22:52:08,737 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34869 conditions, 3172 events. 429/3172 cut-off events. For 706019/706706 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 29168 event pairs, 0 based on Foata normal form. 73/2908 useless extension candidates. Maximal degree in co-relation 34578. Up to 700 conditions per place. [2021-10-13 22:52:08,760 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 444 selfloop transitions, 59 changer transitions 8/555 dead transitions. [2021-10-13 22:52:08,761 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 658 places, 555 transitions, 28370 flow [2021-10-13 22:52:08,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-13 22:52:08,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-10-13 22:52:08,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1386 transitions. [2021-10-13 22:52:08,762 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.84 [2021-10-13 22:52:08,762 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1386 transitions. [2021-10-13 22:52:08,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1386 transitions. [2021-10-13 22:52:08,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:52:08,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1386 transitions. [2021-10-13 22:52:08,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 55.44) internal successors, (1386), 25 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:08,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 66.0) internal successors, (1716), 26 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:08,764 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 66.0) internal successors, (1716), 26 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:08,764 INFO L186 Difference]: Start difference. First operand has 639 places, 521 transitions, 23598 flow. Second operand 25 states and 1386 transitions. [2021-10-13 22:52:08,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 658 places, 555 transitions, 28370 flow [2021-10-13 22:52:11,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 623 places, 555 transitions, 26744 flow, removed 480 selfloop flow, removed 35 redundant places. [2021-10-13 22:52:11,828 INFO L242 Difference]: Finished difference. Result has 628 places, 523 transitions, 22530 flow [2021-10-13 22:52:11,829 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=22138, PETRI_DIFFERENCE_MINUEND_PLACES=599, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=22530, PETRI_PLACES=628, PETRI_TRANSITIONS=523} [2021-10-13 22:52:11,829 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 562 predicate places. [2021-10-13 22:52:11,829 INFO L470 AbstractCegarLoop]: Abstraction has has 628 places, 523 transitions, 22530 flow [2021-10-13 22:52:11,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:11,829 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:52:11,829 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:52:11,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-10-13 22:52:12,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:52:12,043 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:52:12,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:52:12,044 INFO L82 PathProgramCache]: Analyzing trace with hash -250190041, now seen corresponding path program 66 times [2021-10-13 22:52:12,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:52:12,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387256436] [2021-10-13 22:52:12,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:52:12,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:52:12,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:52:12,239 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:52:12,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:52:12,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387256436] [2021-10-13 22:52:12,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387256436] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:52:12,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808273992] [2021-10-13 22:52:12,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:52:12,240 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:52:12,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:52:12,240 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:52:12,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-10-13 22:52:14,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-10-13 22:52:14,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:52:14,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 22:52:14,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:52:14,712 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 1 proven. 237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:52:14,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808273992] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:52:14,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:52:14,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-10-13 22:52:14,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864799205] [2021-10-13 22:52:14,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:52:14,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:52:14,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:52:14,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:52:14,714 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:52:14,714 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 628 places, 523 transitions, 22530 flow. Second operand has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:14,714 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:52:14,714 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:52:14,714 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:52:16,249 INFO L129 PetriNetUnfolder]: 433/3201 cut-off events. [2021-10-13 22:52:16,249 INFO L130 PetriNetUnfolder]: For 684105/684793 co-relation queries the response was YES. [2021-10-13 22:52:16,294 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34403 conditions, 3201 events. 433/3201 cut-off events. For 684105/684793 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 29552 event pairs, 0 based on Foata normal form. 89/2950 useless extension candidates. Maximal degree in co-relation 34111. Up to 611 conditions per place. [2021-10-13 22:52:16,317 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 394 selfloop transitions, 114 changer transitions 8/560 dead transitions. [2021-10-13 22:52:16,317 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 653 places, 560 transitions, 27521 flow [2021-10-13 22:52:16,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 22:52:16,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-10-13 22:52:16,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1606 transitions. [2021-10-13 22:52:16,318 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8390804597701149 [2021-10-13 22:52:16,318 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1606 transitions. [2021-10-13 22:52:16,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1606 transitions. [2021-10-13 22:52:16,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:52:16,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1606 transitions. [2021-10-13 22:52:16,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 55.37931034482759) internal successors, (1606), 29 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:16,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:16,320 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:16,320 INFO L186 Difference]: Start difference. First operand has 628 places, 523 transitions, 22530 flow. Second operand 29 states and 1606 transitions. [2021-10-13 22:52:16,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 653 places, 560 transitions, 27521 flow [2021-10-13 22:52:18,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 631 places, 560 transitions, 27065 flow, removed 173 selfloop flow, removed 22 redundant places. [2021-10-13 22:52:18,680 INFO L242 Difference]: Finished difference. Result has 636 places, 527 transitions, 22899 flow [2021-10-13 22:52:18,680 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=22254, PETRI_DIFFERENCE_MINUEND_PLACES=603, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=22899, PETRI_PLACES=636, PETRI_TRANSITIONS=527} [2021-10-13 22:52:18,680 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 570 predicate places. [2021-10-13 22:52:18,680 INFO L470 AbstractCegarLoop]: Abstraction has has 636 places, 527 transitions, 22899 flow [2021-10-13 22:52:18,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:18,681 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:52:18,681 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:52:18,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-10-13 22:52:18,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:52:18,900 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:52:18,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:52:18,901 INFO L82 PathProgramCache]: Analyzing trace with hash 139987649, now seen corresponding path program 67 times [2021-10-13 22:52:18,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:52:18,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993893670] [2021-10-13 22:52:18,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:52:18,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:52:18,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:52:19,088 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:52:19,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:52:19,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993893670] [2021-10-13 22:52:19,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993893670] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:52:19,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191244294] [2021-10-13 22:52:19,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:52:19,088 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:52:19,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:52:19,089 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:52:19,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-10-13 22:52:20,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:52:20,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 22:52:21,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:52:21,413 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:52:21,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191244294] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:52:21,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:52:21,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-10-13 22:52:21,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355481208] [2021-10-13 22:52:21,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 22:52:21,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:52:21,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 22:52:21,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-10-13 22:52:21,415 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:52:21,415 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 636 places, 527 transitions, 22899 flow. Second operand has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:21,415 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:52:21,415 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:52:21,415 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:52:22,783 INFO L129 PetriNetUnfolder]: 435/3219 cut-off events. [2021-10-13 22:52:22,783 INFO L130 PetriNetUnfolder]: For 671970/672648 co-relation queries the response was YES. [2021-10-13 22:52:22,830 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34426 conditions, 3219 events. 435/3219 cut-off events. For 671970/672648 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 29721 event pairs, 0 based on Foata normal form. 92/2969 useless extension candidates. Maximal degree in co-relation 34132. Up to 602 conditions per place. [2021-10-13 22:52:22,905 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 351 selfloop transitions, 159 changer transitions 8/562 dead transitions. [2021-10-13 22:52:22,905 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 660 places, 562 transitions, 27819 flow [2021-10-13 22:52:22,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 22:52:22,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-13 22:52:22,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1551 transitions. [2021-10-13 22:52:22,906 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8392857142857143 [2021-10-13 22:52:22,906 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1551 transitions. [2021-10-13 22:52:22,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1551 transitions. [2021-10-13 22:52:22,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:52:22,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1551 transitions. [2021-10-13 22:52:22,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 55.392857142857146) internal successors, (1551), 28 states have internal predecessors, (1551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:22,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 66.0) internal successors, (1914), 29 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:22,908 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 66.0) internal successors, (1914), 29 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:22,908 INFO L186 Difference]: Start difference. First operand has 636 places, 527 transitions, 22899 flow. Second operand 28 states and 1551 transitions. [2021-10-13 22:52:22,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 660 places, 562 transitions, 27819 flow [2021-10-13 22:52:24,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 636 places, 562 transitions, 27359 flow, removed 137 selfloop flow, removed 24 redundant places. [2021-10-13 22:52:24,922 INFO L242 Difference]: Finished difference. Result has 641 places, 529 transitions, 23167 flow [2021-10-13 22:52:24,923 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=22563, PETRI_DIFFERENCE_MINUEND_PLACES=609, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=23167, PETRI_PLACES=641, PETRI_TRANSITIONS=529} [2021-10-13 22:52:24,923 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 575 predicate places. [2021-10-13 22:52:24,923 INFO L470 AbstractCegarLoop]: Abstraction has has 641 places, 529 transitions, 23167 flow [2021-10-13 22:52:24,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:24,923 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:52:24,923 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:52:24,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-10-13 22:52:25,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:52:25,124 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:52:25,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:52:25,124 INFO L82 PathProgramCache]: Analyzing trace with hash -103007459, now seen corresponding path program 68 times [2021-10-13 22:52:25,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:52:25,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107554785] [2021-10-13 22:52:25,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:52:25,125 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:52:25,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:52:25,325 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:52:25,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:52:25,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107554785] [2021-10-13 22:52:25,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107554785] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:52:25,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200486267] [2021-10-13 22:52:25,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:52:25,326 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:52:25,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:52:25,326 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:52:25,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-10-13 22:52:27,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:52:27,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:52:27,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 22:52:27,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:52:27,786 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:52:27,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200486267] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:52:27,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:52:27,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-10-13 22:52:27,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581236050] [2021-10-13 22:52:27,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:52:27,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:52:27,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:52:27,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:52:27,787 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:52:27,788 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 641 places, 529 transitions, 23167 flow. Second operand has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:27,788 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:52:27,788 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:52:27,788 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:52:29,212 INFO L129 PetriNetUnfolder]: 439/3262 cut-off events. [2021-10-13 22:52:29,212 INFO L130 PetriNetUnfolder]: For 680484/681118 co-relation queries the response was YES. [2021-10-13 22:52:29,273 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34924 conditions, 3262 events. 439/3262 cut-off events. For 680484/681118 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 30124 event pairs, 0 based on Foata normal form. 108/3023 useless extension candidates. Maximal degree in co-relation 34628. Up to 610 conditions per place. [2021-10-13 22:52:29,296 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 308 selfloop transitions, 207 changer transitions 8/567 dead transitions. [2021-10-13 22:52:29,296 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 668 places, 567 transitions, 28354 flow [2021-10-13 22:52:29,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-13 22:52:29,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-13 22:52:29,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1718 transitions. [2021-10-13 22:52:29,297 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8396871945259042 [2021-10-13 22:52:29,297 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1718 transitions. [2021-10-13 22:52:29,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1718 transitions. [2021-10-13 22:52:29,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:52:29,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1718 transitions. [2021-10-13 22:52:29,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 55.41935483870968) internal successors, (1718), 31 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:29,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 66.0) internal successors, (2112), 32 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:29,300 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 66.0) internal successors, (2112), 32 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:29,300 INFO L186 Difference]: Start difference. First operand has 641 places, 529 transitions, 23167 flow. Second operand 31 states and 1718 transitions. [2021-10-13 22:52:29,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 668 places, 567 transitions, 28354 flow [2021-10-13 22:52:31,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 643 places, 567 transitions, 27790 flow, removed 137 selfloop flow, removed 25 redundant places. [2021-10-13 22:52:31,745 INFO L242 Difference]: Finished difference. Result has 648 places, 533 transitions, 23576 flow [2021-10-13 22:52:31,746 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=22731, PETRI_DIFFERENCE_MINUEND_PLACES=613, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=23576, PETRI_PLACES=648, PETRI_TRANSITIONS=533} [2021-10-13 22:52:31,746 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 582 predicate places. [2021-10-13 22:52:31,746 INFO L470 AbstractCegarLoop]: Abstraction has has 648 places, 533 transitions, 23576 flow [2021-10-13 22:52:31,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:31,746 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:52:31,747 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:52:31,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-10-13 22:52:31,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-10-13 22:52:31,947 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:52:31,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:52:31,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1699183541, now seen corresponding path program 69 times [2021-10-13 22:52:31,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:52:31,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213586075] [2021-10-13 22:52:31,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:52:31,948 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:52:31,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:52:32,128 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:52:32,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:52:32,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213586075] [2021-10-13 22:52:32,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213586075] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:52:32,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276411093] [2021-10-13 22:52:32,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:52:32,129 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:52:32,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:52:32,130 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:52:32,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-10-13 22:52:34,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-10-13 22:52:34,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:52:34,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-13 22:52:34,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:52:34,677 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:52:34,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276411093] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:52:34,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:52:34,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-10-13 22:52:34,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258023218] [2021-10-13 22:52:34,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 22:52:34,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:52:34,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 22:52:34,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-10-13 22:52:34,678 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:52:34,679 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 648 places, 533 transitions, 23576 flow. Second operand has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:34,679 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:52:34,679 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:52:34,679 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:52:36,064 INFO L129 PetriNetUnfolder]: 443/3298 cut-off events. [2021-10-13 22:52:36,064 INFO L130 PetriNetUnfolder]: For 688739/689373 co-relation queries the response was YES. [2021-10-13 22:52:36,142 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35419 conditions, 3298 events. 443/3298 cut-off events. For 688739/689373 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 30519 event pairs, 0 based on Foata normal form. 111/3058 useless extension candidates. Maximal degree in co-relation 35121. Up to 618 conditions per place. [2021-10-13 22:52:36,166 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 275 selfloop transitions, 246 changer transitions 8/573 dead transitions. [2021-10-13 22:52:36,166 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 674 places, 573 transitions, 28908 flow [2021-10-13 22:52:36,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 22:52:36,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-10-13 22:52:36,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1663 transitions. [2021-10-13 22:52:36,168 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8398989898989899 [2021-10-13 22:52:36,168 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1663 transitions. [2021-10-13 22:52:36,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1663 transitions. [2021-10-13 22:52:36,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:52:36,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1663 transitions. [2021-10-13 22:52:36,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 55.43333333333333) internal successors, (1663), 30 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:36,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:36,170 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:36,170 INFO L186 Difference]: Start difference. First operand has 648 places, 533 transitions, 23576 flow. Second operand 30 states and 1663 transitions. [2021-10-13 22:52:36,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 674 places, 573 transitions, 28908 flow [2021-10-13 22:52:38,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 645 places, 573 transitions, 28228 flow, removed 143 selfloop flow, removed 29 redundant places. [2021-10-13 22:52:38,662 INFO L242 Difference]: Finished difference. Result has 652 places, 537 transitions, 23999 flow [2021-10-13 22:52:38,663 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=23028, PETRI_DIFFERENCE_MINUEND_PLACES=616, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=23999, PETRI_PLACES=652, PETRI_TRANSITIONS=537} [2021-10-13 22:52:38,663 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 586 predicate places. [2021-10-13 22:52:38,663 INFO L470 AbstractCegarLoop]: Abstraction has has 652 places, 537 transitions, 23999 flow [2021-10-13 22:52:38,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:38,663 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:52:38,663 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:52:38,687 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-10-13 22:52:38,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:52:38,864 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:52:38,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:52:38,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1022488053, now seen corresponding path program 70 times [2021-10-13 22:52:38,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:52:38,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985778550] [2021-10-13 22:52:38,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:52:38,864 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:52:38,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:52:39,108 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:52:39,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:52:39,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985778550] [2021-10-13 22:52:39,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985778550] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:52:39,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403402650] [2021-10-13 22:52:39,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:52:39,109 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:52:39,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:52:39,110 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:52:39,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-10-13 22:52:41,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:52:41,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:52:41,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 22:52:41,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:52:41,633 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 4 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:52:41,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403402650] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:52:41,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:52:41,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-10-13 22:52:41,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415614880] [2021-10-13 22:52:41,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:52:41,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:52:41,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:52:41,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:52:41,635 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:52:41,635 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 652 places, 537 transitions, 23999 flow. Second operand has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:41,635 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:52:41,635 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:52:41,635 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:52:43,201 INFO L129 PetriNetUnfolder]: 453/3388 cut-off events. [2021-10-13 22:52:43,201 INFO L130 PetriNetUnfolder]: For 706491/707125 co-relation queries the response was YES. [2021-10-13 22:52:43,258 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36563 conditions, 3388 events. 453/3388 cut-off events. For 706491/707125 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 31653 event pairs, 0 based on Foata normal form. 157/3184 useless extension candidates. Maximal degree in co-relation 36261. Up to 638 conditions per place. [2021-10-13 22:52:43,283 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 185 selfloop transitions, 348 changer transitions 8/585 dead transitions. [2021-10-13 22:52:43,283 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 683 places, 585 transitions, 30133 flow [2021-10-13 22:52:43,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-13 22:52:43,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-10-13 22:52:43,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1942 transitions. [2021-10-13 22:52:43,284 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8406926406926407 [2021-10-13 22:52:43,284 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1942 transitions. [2021-10-13 22:52:43,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1942 transitions. [2021-10-13 22:52:43,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:52:43,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1942 transitions. [2021-10-13 22:52:43,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 55.48571428571429) internal successors, (1942), 35 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:43,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 66.0) internal successors, (2376), 36 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:43,287 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 66.0) internal successors, (2376), 36 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:43,287 INFO L186 Difference]: Start difference. First operand has 652 places, 537 transitions, 23999 flow. Second operand 35 states and 1942 transitions. [2021-10-13 22:52:43,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 683 places, 585 transitions, 30133 flow [2021-10-13 22:52:46,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 658 places, 585 transitions, 29427 flow, removed 147 selfloop flow, removed 25 redundant places. [2021-10-13 22:52:46,233 INFO L242 Difference]: Finished difference. Result has 667 places, 547 transitions, 25131 flow [2021-10-13 22:52:46,234 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=23437, PETRI_DIFFERENCE_MINUEND_PLACES=624, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=338, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=25131, PETRI_PLACES=667, PETRI_TRANSITIONS=547} [2021-10-13 22:52:46,234 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 601 predicate places. [2021-10-13 22:52:46,234 INFO L470 AbstractCegarLoop]: Abstraction has has 667 places, 547 transitions, 25131 flow [2021-10-13 22:52:46,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:46,234 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:52:46,234 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:52:46,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-10-13 22:52:46,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:52:46,435 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:52:46,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:52:46,435 INFO L82 PathProgramCache]: Analyzing trace with hash 716694435, now seen corresponding path program 71 times [2021-10-13 22:52:46,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:52:46,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458326463] [2021-10-13 22:52:46,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:52:46,435 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:52:46,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:52:46,591 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:52:46,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:52:46,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458326463] [2021-10-13 22:52:46,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458326463] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:52:46,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166346843] [2021-10-13 22:52:46,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:52:46,592 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:52:46,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:52:46,592 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:52:46,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-10-13 22:52:48,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-10-13 22:52:48,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:52:48,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 22:52:48,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:52:49,095 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:52:49,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166346843] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:52:49,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:52:49,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-10-13 22:52:49,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320967758] [2021-10-13 22:52:49,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 22:52:49,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:52:49,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 22:52:49,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-10-13 22:52:49,097 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:52:49,097 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 667 places, 547 transitions, 25131 flow. Second operand has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:49,097 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:52:49,097 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:52:49,097 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:52:50,601 INFO L129 PetriNetUnfolder]: 457/3417 cut-off events. [2021-10-13 22:52:50,602 INFO L130 PetriNetUnfolder]: For 715933/716603 co-relation queries the response was YES. [2021-10-13 22:52:50,668 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37201 conditions, 3417 events. 457/3417 cut-off events. For 715933/716603 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 31962 event pairs, 0 based on Foata normal form. 157/3210 useless extension candidates. Maximal degree in co-relation 36893. Up to 646 conditions per place. [2021-10-13 22:52:50,692 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 164 selfloop transitions, 373 changer transitions 8/589 dead transitions. [2021-10-13 22:52:50,692 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 697 places, 589 transitions, 30971 flow [2021-10-13 22:52:50,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-13 22:52:50,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-10-13 22:52:50,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1887 transitions. [2021-10-13 22:52:50,694 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8409090909090909 [2021-10-13 22:52:50,694 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1887 transitions. [2021-10-13 22:52:50,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1887 transitions. [2021-10-13 22:52:50,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:52:50,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1887 transitions. [2021-10-13 22:52:50,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 55.5) internal successors, (1887), 34 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:50,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 66.0) internal successors, (2310), 35 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:50,696 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 66.0) internal successors, (2310), 35 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:50,696 INFO L186 Difference]: Start difference. First operand has 667 places, 547 transitions, 25131 flow. Second operand 34 states and 1887 transitions. [2021-10-13 22:52:50,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 697 places, 589 transitions, 30971 flow [2021-10-13 22:52:53,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 671 places, 589 transitions, 30164 flow, removed 161 selfloop flow, removed 26 redundant places. [2021-10-13 22:52:53,815 INFO L242 Difference]: Finished difference. Result has 676 places, 551 transitions, 25670 flow [2021-10-13 22:52:53,816 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=24472, PETRI_DIFFERENCE_MINUEND_PLACES=638, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=369, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=25670, PETRI_PLACES=676, PETRI_TRANSITIONS=551} [2021-10-13 22:52:53,816 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 610 predicate places. [2021-10-13 22:52:53,816 INFO L470 AbstractCegarLoop]: Abstraction has has 676 places, 551 transitions, 25670 flow [2021-10-13 22:52:53,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:53,816 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:52:53,817 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:52:53,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-10-13 22:52:54,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-10-13 22:52:54,031 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:52:54,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:52:54,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1184985541, now seen corresponding path program 72 times [2021-10-13 22:52:54,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:52:54,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416610170] [2021-10-13 22:52:54,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:52:54,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:52:54,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:52:54,174 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:52:54,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:52:54,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416610170] [2021-10-13 22:52:54,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416610170] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:52:54,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802448111] [2021-10-13 22:52:54,175 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:52:54,175 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:52:54,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:52:54,176 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:52:54,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-10-13 22:52:56,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-10-13 22:52:56,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:52:56,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 22:52:56,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:52:56,712 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:52:56,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802448111] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:52:56,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:52:56,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-10-13 22:52:56,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282020636] [2021-10-13 22:52:56,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 22:52:56,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:52:56,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 22:52:56,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-10-13 22:52:56,713 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:52:56,714 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 676 places, 551 transitions, 25670 flow. Second operand has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:56,714 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:52:56,714 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:52:56,714 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:52:58,285 INFO L129 PetriNetUnfolder]: 461/3446 cut-off events. [2021-10-13 22:52:58,286 INFO L130 PetriNetUnfolder]: For 726681/727375 co-relation queries the response was YES. [2021-10-13 22:52:58,345 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37767 conditions, 3446 events. 461/3446 cut-off events. For 726681/727375 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 32214 event pairs, 0 based on Foata normal form. 187/3266 useless extension candidates. Maximal degree in co-relation 37457. Up to 654 conditions per place. [2021-10-13 22:52:58,369 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 112 selfloop transitions, 434 changer transitions 8/598 dead transitions. [2021-10-13 22:52:58,370 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 710 places, 598 transitions, 32041 flow [2021-10-13 22:52:58,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-13 22:52:58,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-10-13 22:52:58,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2111 transitions. [2021-10-13 22:52:58,371 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8417065390749602 [2021-10-13 22:52:58,371 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2111 transitions. [2021-10-13 22:52:58,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2111 transitions. [2021-10-13 22:52:58,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:52:58,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2111 transitions. [2021-10-13 22:52:58,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 55.55263157894737) internal successors, (2111), 38 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:58,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 66.0) internal successors, (2574), 39 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:58,374 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 66.0) internal successors, (2574), 39 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:58,374 INFO L186 Difference]: Start difference. First operand has 676 places, 551 transitions, 25670 flow. Second operand 38 states and 2111 transitions. [2021-10-13 22:52:58,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 710 places, 598 transitions, 32041 flow [2021-10-13 22:53:01,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 679 places, 598 transitions, 31034 flow, removed 161 selfloop flow, removed 31 redundant places. [2021-10-13 22:53:01,492 INFO L242 Difference]: Finished difference. Result has 684 places, 555 transitions, 26163 flow [2021-10-13 22:53:01,493 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=24831, PETRI_DIFFERENCE_MINUEND_PLACES=642, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=430, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=26163, PETRI_PLACES=684, PETRI_TRANSITIONS=555} [2021-10-13 22:53:01,493 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 618 predicate places. [2021-10-13 22:53:01,493 INFO L470 AbstractCegarLoop]: Abstraction has has 684 places, 555 transitions, 26163 flow [2021-10-13 22:53:01,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:01,493 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:53:01,493 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:53:01,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-10-13 22:53:01,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:53:01,718 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:53:01,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:53:01,719 INFO L82 PathProgramCache]: Analyzing trace with hash -2098808585, now seen corresponding path program 73 times [2021-10-13 22:53:01,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:53:01,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038096704] [2021-10-13 22:53:01,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:53:01,719 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:53:01,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:53:01,926 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:53:01,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:53:01,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038096704] [2021-10-13 22:53:01,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038096704] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:53:01,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840106650] [2021-10-13 22:53:01,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:53:01,927 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:53:01,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:53:01,928 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:53:01,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-10-13 22:53:04,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:53:04,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 22:53:04,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:53:04,436 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:53:04,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840106650] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:53:04,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:53:04,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-10-13 22:53:04,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937631974] [2021-10-13 22:53:04,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 22:53:04,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:53:04,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 22:53:04,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-10-13 22:53:04,438 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:53:04,438 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 684 places, 555 transitions, 26163 flow. Second operand has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:04,438 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:53:04,439 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:53:04,439 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:53:06,228 INFO L129 PetriNetUnfolder]: 467/3484 cut-off events. [2021-10-13 22:53:06,229 INFO L130 PetriNetUnfolder]: For 738559/739287 co-relation queries the response was YES. [2021-10-13 22:53:06,295 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38406 conditions, 3484 events. 467/3484 cut-off events. For 738559/739287 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 32575 event pairs, 0 based on Foata normal form. 198/3312 useless extension candidates. Maximal degree in co-relation 38094. Up to 664 conditions per place. [2021-10-13 22:53:06,322 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 97 selfloop transitions, 458 changer transitions 8/607 dead transitions. [2021-10-13 22:53:06,323 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 722 places, 607 transitions, 33131 flow [2021-10-13 22:53:06,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-13 22:53:06,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-10-13 22:53:06,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2335 transitions. [2021-10-13 22:53:06,324 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8423520923520924 [2021-10-13 22:53:06,324 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2335 transitions. [2021-10-13 22:53:06,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2335 transitions. [2021-10-13 22:53:06,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:53:06,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2335 transitions. [2021-10-13 22:53:06,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 55.595238095238095) internal successors, (2335), 42 states have internal predecessors, (2335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:06,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 66.0) internal successors, (2838), 43 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:06,328 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 66.0) internal successors, (2838), 43 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:06,328 INFO L186 Difference]: Start difference. First operand has 684 places, 555 transitions, 26163 flow. Second operand 42 states and 2335 transitions. [2021-10-13 22:53:06,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 722 places, 607 transitions, 33131 flow [2021-10-13 22:53:09,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 687 places, 607 transitions, 31998 flow, removed 169 selfloop flow, removed 35 redundant places. [2021-10-13 22:53:09,974 INFO L242 Difference]: Finished difference. Result has 694 places, 561 transitions, 26825 flow [2021-10-13 22:53:09,975 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=25214, PETRI_DIFFERENCE_MINUEND_PLACES=646, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=453, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=26825, PETRI_PLACES=694, PETRI_TRANSITIONS=561} [2021-10-13 22:53:09,975 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 628 predicate places. [2021-10-13 22:53:09,975 INFO L470 AbstractCegarLoop]: Abstraction has has 694 places, 561 transitions, 26825 flow [2021-10-13 22:53:09,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:09,975 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:53:09,975 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:53:10,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-10-13 22:53:10,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:53:10,176 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:53:10,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:53:10,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1729112104, now seen corresponding path program 74 times [2021-10-13 22:53:10,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:53:10,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194642285] [2021-10-13 22:53:10,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:53:10,176 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:53:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:53:10,428 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:53:10,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:53:10,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194642285] [2021-10-13 22:53:10,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194642285] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:53:10,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635362637] [2021-10-13 22:53:10,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:53:10,428 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:53:10,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:53:10,429 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:53:10,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-10-13 22:53:12,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:53:12,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:53:12,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 22:53:12,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:53:13,117 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:53:13,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635362637] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:53:13,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:53:13,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-10-13 22:53:13,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539358084] [2021-10-13 22:53:13,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:53:13,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:53:13,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:53:13,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:53:13,119 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:53:13,119 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 694 places, 561 transitions, 26825 flow. Second operand has 23 states, 23 states have (on average 54.08695652173913) internal successors, (1244), 23 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:13,119 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:53:13,120 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:53:13,120 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:53:14,540 INFO L129 PetriNetUnfolder]: 469/3509 cut-off events. [2021-10-13 22:53:14,540 INFO L130 PetriNetUnfolder]: For 761491/762137 co-relation queries the response was YES. [2021-10-13 22:53:14,609 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39064 conditions, 3509 events. 469/3509 cut-off events. For 761491/762137 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 32746 event pairs, 0 based on Foata normal form. 73/3207 useless extension candidates. Maximal degree in co-relation 38748. Up to 829 conditions per place. [2021-10-13 22:53:14,635 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 509 selfloop transitions, 31 changer transitions 8/592 dead transitions. [2021-10-13 22:53:14,636 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 715 places, 592 transitions, 31593 flow [2021-10-13 22:53:14,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-13 22:53:14,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-10-13 22:53:14,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1385 transitions. [2021-10-13 22:53:14,637 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8393939393939394 [2021-10-13 22:53:14,637 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1385 transitions. [2021-10-13 22:53:14,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1385 transitions. [2021-10-13 22:53:14,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:53:14,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1385 transitions. [2021-10-13 22:53:14,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 55.4) internal successors, (1385), 25 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:14,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 66.0) internal successors, (1716), 26 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:14,639 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 66.0) internal successors, (1716), 26 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:14,639 INFO L186 Difference]: Start difference. First operand has 694 places, 561 transitions, 26825 flow. Second operand 25 states and 1385 transitions. [2021-10-13 22:53:14,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 715 places, 592 transitions, 31593 flow [2021-10-13 22:53:18,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 680 places, 592 transitions, 30472 flow, removed 192 selfloop flow, removed 35 redundant places. [2021-10-13 22:53:18,386 INFO L242 Difference]: Finished difference. Result has 685 places, 563 transitions, 26094 flow [2021-10-13 22:53:18,387 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=25758, PETRI_DIFFERENCE_MINUEND_PLACES=656, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=26094, PETRI_PLACES=685, PETRI_TRANSITIONS=563} [2021-10-13 22:53:18,387 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 619 predicate places. [2021-10-13 22:53:18,387 INFO L470 AbstractCegarLoop]: Abstraction has has 685 places, 563 transitions, 26094 flow [2021-10-13 22:53:18,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.08695652173913) internal successors, (1244), 23 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:18,387 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:53:18,387 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:53:18,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-10-13 22:53:18,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:53:18,588 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:53:18,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:53:18,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1156150236, now seen corresponding path program 75 times [2021-10-13 22:53:18,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:53:18,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606216127] [2021-10-13 22:53:18,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:53:18,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:53:18,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:53:18,780 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:53:18,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:53:18,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606216127] [2021-10-13 22:53:18,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606216127] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:53:18,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600912194] [2021-10-13 22:53:18,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:53:18,780 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:53:18,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:53:18,782 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:53:18,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-10-13 22:53:21,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-10-13 22:53:21,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:53:21,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 22:53:21,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:53:21,495 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:53:21,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600912194] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:53:21,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:53:21,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-10-13 22:53:21,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847033146] [2021-10-13 22:53:21,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:53:21,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:53:21,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:53:21,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:53:21,496 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:53:21,497 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 685 places, 563 transitions, 26094 flow. Second operand has 23 states, 23 states have (on average 54.08695652173913) internal successors, (1244), 23 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:21,497 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:53:21,497 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:53:21,497 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:53:22,976 INFO L129 PetriNetUnfolder]: 471/3520 cut-off events. [2021-10-13 22:53:22,976 INFO L130 PetriNetUnfolder]: For 785670/786367 co-relation queries the response was YES. [2021-10-13 22:53:23,066 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39198 conditions, 3520 events. 471/3520 cut-off events. For 785670/786367 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 32888 event pairs, 0 based on Foata normal form. 77/3221 useless extension candidates. Maximal degree in co-relation 38880. Up to 744 conditions per place. [2021-10-13 22:53:23,092 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 466 selfloop transitions, 78 changer transitions 8/596 dead transitions. [2021-10-13 22:53:23,093 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 710 places, 596 transitions, 31192 flow [2021-10-13 22:53:23,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 22:53:23,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-10-13 22:53:23,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1608 transitions. [2021-10-13 22:53:23,094 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8401253918495298 [2021-10-13 22:53:23,094 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1608 transitions. [2021-10-13 22:53:23,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1608 transitions. [2021-10-13 22:53:23,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:53:23,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1608 transitions. [2021-10-13 22:53:23,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 55.44827586206897) internal successors, (1608), 29 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:23,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:23,096 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:23,096 INFO L186 Difference]: Start difference. First operand has 685 places, 563 transitions, 26094 flow. Second operand 29 states and 1608 transitions. [2021-10-13 22:53:23,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 710 places, 596 transitions, 31192 flow [2021-10-13 22:53:27,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 688 places, 596 transitions, 30848 flow, removed 143 selfloop flow, removed 22 redundant places. [2021-10-13 22:53:27,106 INFO L242 Difference]: Finished difference. Result has 693 places, 565 transitions, 26309 flow [2021-10-13 22:53:27,107 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=25874, PETRI_DIFFERENCE_MINUEND_PLACES=660, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=26309, PETRI_PLACES=693, PETRI_TRANSITIONS=565} [2021-10-13 22:53:27,107 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 627 predicate places. [2021-10-13 22:53:27,107 INFO L470 AbstractCegarLoop]: Abstraction has has 693 places, 565 transitions, 26309 flow [2021-10-13 22:53:27,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.08695652173913) internal successors, (1244), 23 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:27,107 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:53:27,107 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:53:27,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-10-13 22:53:27,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-10-13 22:53:27,308 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:53:27,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:53:27,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1976429144, now seen corresponding path program 76 times [2021-10-13 22:53:27,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:53:27,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228390289] [2021-10-13 22:53:27,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:53:27,308 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:53:27,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:53:27,484 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:53:27,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:53:27,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228390289] [2021-10-13 22:53:27,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228390289] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:53:27,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283649250] [2021-10-13 22:53:27,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:53:27,485 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:53:27,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:53:27,486 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:53:27,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-10-13 22:53:29,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:53:29,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:53:29,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 22:53:29,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:53:30,289 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:53:30,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283649250] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:53:30,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:53:30,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-10-13 22:53:30,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114770239] [2021-10-13 22:53:30,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:53:30,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:53:30,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:53:30,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:53:30,291 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:53:30,292 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 693 places, 565 transitions, 26309 flow. Second operand has 23 states, 23 states have (on average 54.08695652173913) internal successors, (1244), 23 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:30,292 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:53:30,292 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:53:30,292 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:53:31,925 INFO L129 PetriNetUnfolder]: 473/3538 cut-off events. [2021-10-13 22:53:31,925 INFO L130 PetriNetUnfolder]: For 790407/791104 co-relation queries the response was YES. [2021-10-13 22:53:31,988 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39455 conditions, 3538 events. 473/3538 cut-off events. For 790407/791104 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 33085 event pairs, 0 based on Foata normal form. 121/3281 useless extension candidates. Maximal degree in co-relation 39135. Up to 676 conditions per place. [2021-10-13 22:53:32,013 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 303 selfloop transitions, 247 changer transitions 8/602 dead transitions. [2021-10-13 22:53:32,014 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 723 places, 602 transitions, 31939 flow [2021-10-13 22:53:32,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-13 22:53:32,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-10-13 22:53:32,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1885 transitions. [2021-10-13 22:53:32,015 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8400178253119429 [2021-10-13 22:53:32,015 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1885 transitions. [2021-10-13 22:53:32,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1885 transitions. [2021-10-13 22:53:32,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:53:32,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1885 transitions. [2021-10-13 22:53:32,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 55.44117647058823) internal successors, (1885), 34 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:32,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 66.0) internal successors, (2310), 35 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:32,018 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 66.0) internal successors, (2310), 35 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:32,018 INFO L186 Difference]: Start difference. First operand has 693 places, 565 transitions, 26309 flow. Second operand 34 states and 1885 transitions. [2021-10-13 22:53:32,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 723 places, 602 transitions, 31939 flow [2021-10-13 22:53:36,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 698 places, 602 transitions, 31503 flow, removed 149 selfloop flow, removed 25 redundant places. [2021-10-13 22:53:36,401 INFO L242 Difference]: Finished difference. Result has 703 places, 567 transitions, 26804 flow [2021-10-13 22:53:36,401 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=26013, PETRI_DIFFERENCE_MINUEND_PLACES=665, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=26804, PETRI_PLACES=703, PETRI_TRANSITIONS=567} [2021-10-13 22:53:36,401 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 637 predicate places. [2021-10-13 22:53:36,401 INFO L470 AbstractCegarLoop]: Abstraction has has 703 places, 567 transitions, 26804 flow [2021-10-13 22:53:36,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.08695652173913) internal successors, (1244), 23 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:36,401 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:53:36,401 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:53:36,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-10-13 22:53:36,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:53:36,602 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:53:36,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:53:36,603 INFO L82 PathProgramCache]: Analyzing trace with hash 2030841636, now seen corresponding path program 77 times [2021-10-13 22:53:36,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:53:36,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677001] [2021-10-13 22:53:36,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:53:36,603 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:53:36,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:53:36,791 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:53:36,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:53:36,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677001] [2021-10-13 22:53:36,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677001] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:53:36,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592369300] [2021-10-13 22:53:36,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:53:36,792 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:53:36,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:53:36,793 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:53:36,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-10-13 22:53:39,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-10-13 22:53:39,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:53:39,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 22:53:39,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:53:39,675 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:53:39,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592369300] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:53:39,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:53:39,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-10-13 22:53:39,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248625493] [2021-10-13 22:53:39,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 22:53:39,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:53:39,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 22:53:39,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-10-13 22:53:39,677 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:53:39,677 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 703 places, 567 transitions, 26804 flow. Second operand has 24 states, 24 states have (on average 54.125) internal successors, (1299), 24 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:39,678 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:53:39,678 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:53:39,678 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:53:41,365 INFO L129 PetriNetUnfolder]: 475/3563 cut-off events. [2021-10-13 22:53:41,365 INFO L130 PetriNetUnfolder]: For 796579/797230 co-relation queries the response was YES. [2021-10-13 22:53:41,435 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39857 conditions, 3563 events. 475/3563 cut-off events. For 796579/797230 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 33188 event pairs, 0 based on Foata normal form. 126/3308 useless extension candidates. Maximal degree in co-relation 39534. Up to 680 conditions per place. [2021-10-13 22:53:41,463 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 272 selfloop transitions, 281 changer transitions 8/605 dead transitions. [2021-10-13 22:53:41,463 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 734 places, 605 transitions, 32568 flow [2021-10-13 22:53:41,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-13 22:53:41,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-10-13 22:53:41,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1941 transitions. [2021-10-13 22:53:41,465 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8402597402597403 [2021-10-13 22:53:41,465 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1941 transitions. [2021-10-13 22:53:41,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1941 transitions. [2021-10-13 22:53:41,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:53:41,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1941 transitions. [2021-10-13 22:53:41,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 55.457142857142856) internal successors, (1941), 35 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:41,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 66.0) internal successors, (2376), 36 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:41,467 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 66.0) internal successors, (2376), 36 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:41,467 INFO L186 Difference]: Start difference. First operand has 703 places, 567 transitions, 26804 flow. Second operand 35 states and 1941 transitions. [2021-10-13 22:53:41,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 734 places, 605 transitions, 32568 flow [2021-10-13 22:53:45,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 703 places, 605 transitions, 31822 flow, removed 155 selfloop flow, removed 31 redundant places. [2021-10-13 22:53:45,212 INFO L242 Difference]: Finished difference. Result has 708 places, 569 transitions, 27069 flow [2021-10-13 22:53:45,212 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=26202, PETRI_DIFFERENCE_MINUEND_PLACES=669, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=27069, PETRI_PLACES=708, PETRI_TRANSITIONS=569} [2021-10-13 22:53:45,212 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 642 predicate places. [2021-10-13 22:53:45,212 INFO L470 AbstractCegarLoop]: Abstraction has has 708 places, 569 transitions, 27069 flow [2021-10-13 22:53:45,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.125) internal successors, (1299), 24 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:45,212 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:53:45,213 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:53:45,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-10-13 22:53:45,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:53:45,413 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:53:45,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:53:45,413 INFO L82 PathProgramCache]: Analyzing trace with hash 2124772198, now seen corresponding path program 78 times [2021-10-13 22:53:45,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:53:45,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051714044] [2021-10-13 22:53:45,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:53:45,414 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:53:45,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:53:45,590 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:53:45,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:53:45,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051714044] [2021-10-13 22:53:45,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051714044] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:53:45,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739825117] [2021-10-13 22:53:45,590 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:53:45,590 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:53:45,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:53:45,591 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:53:45,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-10-13 22:53:48,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-10-13 22:53:48,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:53:48,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 22:53:48,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:53:48,456 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:53:48,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739825117] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:53:48,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:53:48,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-10-13 22:53:48,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892320494] [2021-10-13 22:53:48,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 22:53:48,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:53:48,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 22:53:48,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-10-13 22:53:48,457 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:53:48,458 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 708 places, 569 transitions, 27069 flow. Second operand has 24 states, 24 states have (on average 54.125) internal successors, (1299), 24 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:48,458 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:53:48,458 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:53:48,458 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:53:50,222 INFO L129 PetriNetUnfolder]: 479/3599 cut-off events. [2021-10-13 22:53:50,222 INFO L130 PetriNetUnfolder]: For 805045/805696 co-relation queries the response was YES. [2021-10-13 22:53:50,282 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40357 conditions, 3599 events. 479/3599 cut-off events. For 805045/805696 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 33650 event pairs, 0 based on Foata normal form. 175/3389 useless extension candidates. Maximal degree in co-relation 40032. Up to 688 conditions per place. [2021-10-13 22:53:50,311 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 169 selfloop transitions, 390 changer transitions 8/611 dead transitions. [2021-10-13 22:53:50,311 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 743 places, 611 transitions, 33481 flow [2021-10-13 22:53:50,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-13 22:53:50,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-10-13 22:53:50,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2165 transitions. [2021-10-13 22:53:50,313 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8411033411033411 [2021-10-13 22:53:50,313 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2165 transitions. [2021-10-13 22:53:50,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2165 transitions. [2021-10-13 22:53:50,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:53:50,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2165 transitions. [2021-10-13 22:53:50,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 55.51282051282051) internal successors, (2165), 39 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:50,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 66.0) internal successors, (2640), 40 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:50,316 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 66.0) internal successors, (2640), 40 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:50,316 INFO L186 Difference]: Start difference. First operand has 708 places, 569 transitions, 27069 flow. Second operand 39 states and 2165 transitions. [2021-10-13 22:53:50,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 743 places, 611 transitions, 33481 flow [2021-10-13 22:53:53,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 716 places, 611 transitions, 32783 flow, removed 159 selfloop flow, removed 27 redundant places. [2021-10-13 22:53:53,177 INFO L242 Difference]: Finished difference. Result has 723 places, 573 transitions, 27830 flow [2021-10-13 22:53:53,177 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=26531, PETRI_DIFFERENCE_MINUEND_PLACES=678, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=386, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=27830, PETRI_PLACES=723, PETRI_TRANSITIONS=573} [2021-10-13 22:53:53,178 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 657 predicate places. [2021-10-13 22:53:53,178 INFO L470 AbstractCegarLoop]: Abstraction has has 723 places, 573 transitions, 27830 flow [2021-10-13 22:53:53,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.125) internal successors, (1299), 24 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:53,178 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:53:53,178 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:53:53,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-10-13 22:53:53,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-10-13 22:53:53,378 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:53:53,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:53:53,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1666827052, now seen corresponding path program 79 times [2021-10-13 22:53:53,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:53:53,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481587439] [2021-10-13 22:53:53,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:53:53,379 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:53:53,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:53:53,548 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:53:53,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:53:53,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481587439] [2021-10-13 22:53:53,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481587439] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:53:53,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431790061] [2021-10-13 22:53:53,549 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:53:53,549 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:53:53,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:53:53,550 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:53:53,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-10-13 22:53:55,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:53:55,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 22:53:55,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:53:56,219 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:53:56,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431790061] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:53:56,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:53:56,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-10-13 22:53:56,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001977240] [2021-10-13 22:53:56,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:53:56,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:53:56,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:53:56,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:53:56,221 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:53:56,221 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 723 places, 573 transitions, 27830 flow. Second operand has 23 states, 23 states have (on average 54.08695652173913) internal successors, (1244), 23 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:56,221 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:53:56,221 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:53:56,221 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:53:58,222 INFO L129 PetriNetUnfolder]: 497/3679 cut-off events. [2021-10-13 22:53:58,223 INFO L130 PetriNetUnfolder]: For 839880/840714 co-relation queries the response was YES. [2021-10-13 22:53:58,281 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42213 conditions, 3679 events. 497/3679 cut-off events. For 839880/840714 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 34322 event pairs, 0 based on Foata normal form. 198/3485 useless extension candidates. Maximal degree in co-relation 41884. Up to 714 conditions per place. [2021-10-13 22:53:58,309 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 123 selfloop transitions, 455 changer transitions 8/630 dead transitions. [2021-10-13 22:53:58,310 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 763 places, 630 transitions, 35508 flow [2021-10-13 22:53:58,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-13 22:53:58,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-10-13 22:53:58,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2449 transitions. [2021-10-13 22:53:58,311 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8433195592286501 [2021-10-13 22:53:58,311 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2449 transitions. [2021-10-13 22:53:58,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2449 transitions. [2021-10-13 22:53:58,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:53:58,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2449 transitions. [2021-10-13 22:53:58,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 55.65909090909091) internal successors, (2449), 44 states have internal predecessors, (2449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:58,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 66.0) internal successors, (2970), 45 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:58,314 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 66.0) internal successors, (2970), 45 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:58,314 INFO L186 Difference]: Start difference. First operand has 723 places, 573 transitions, 27830 flow. Second operand 44 states and 2449 transitions. [2021-10-13 22:53:58,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 763 places, 630 transitions, 35508 flow [2021-10-13 22:54:01,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 730 places, 630 transitions, 34474 flow, removed 188 selfloop flow, removed 33 redundant places. [2021-10-13 22:54:01,554 INFO L242 Difference]: Finished difference. Result has 739 places, 583 transitions, 28930 flow [2021-10-13 22:54:01,555 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=27010, PETRI_DIFFERENCE_MINUEND_PLACES=687, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=445, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=28930, PETRI_PLACES=739, PETRI_TRANSITIONS=583} [2021-10-13 22:54:01,555 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 673 predicate places. [2021-10-13 22:54:01,555 INFO L470 AbstractCegarLoop]: Abstraction has has 739 places, 583 transitions, 28930 flow [2021-10-13 22:54:01,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.08695652173913) internal successors, (1244), 23 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:01,555 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:54:01,556 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:54:01,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-10-13 22:54:01,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:54:01,770 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:54:01,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:54:01,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1563567794, now seen corresponding path program 80 times [2021-10-13 22:54:01,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:54:01,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863836342] [2021-10-13 22:54:01,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:54:01,771 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:54:01,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:54:01,960 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:54:01,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:54:01,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863836342] [2021-10-13 22:54:01,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863836342] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:54:01,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774642323] [2021-10-13 22:54:01,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:54:01,960 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:54:01,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:54:01,961 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:54:01,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-10-13 22:54:04,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:54:04,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:54:04,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 22:54:04,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:54:04,821 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:54:04,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774642323] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:54:04,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:54:04,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-10-13 22:54:04,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338434510] [2021-10-13 22:54:04,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 22:54:04,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:54:04,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 22:54:04,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-10-13 22:54:04,823 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:54:04,823 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 739 places, 583 transitions, 28930 flow. Second operand has 24 states, 24 states have (on average 54.083333333333336) internal successors, (1298), 24 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:04,823 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:54:04,824 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:54:04,824 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:54:06,941 INFO L129 PetriNetUnfolder]: 503/3725 cut-off events. [2021-10-13 22:54:06,942 INFO L130 PetriNetUnfolder]: For 893515/894457 co-relation queries the response was YES. [2021-10-13 22:54:07,013 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43683 conditions, 3725 events. 503/3725 cut-off events. For 893515/894457 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 34838 event pairs, 0 based on Foata normal form. 209/3538 useless extension candidates. Maximal degree in co-relation 43348. Up to 728 conditions per place. [2021-10-13 22:54:07,041 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 122 selfloop transitions, 465 changer transitions 17/648 dead transitions. [2021-10-13 22:54:07,041 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 783 places, 648 transitions, 38150 flow [2021-10-13 22:54:07,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-10-13 22:54:07,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-10-13 22:54:07,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2670 transitions. [2021-10-13 22:54:07,043 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8428030303030303 [2021-10-13 22:54:07,043 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2670 transitions. [2021-10-13 22:54:07,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2670 transitions. [2021-10-13 22:54:07,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:54:07,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2670 transitions. [2021-10-13 22:54:07,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 55.625) internal successors, (2670), 48 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:07,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 66.0) internal successors, (3234), 49 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:07,046 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 66.0) internal successors, (3234), 49 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:07,046 INFO L186 Difference]: Start difference. First operand has 739 places, 583 transitions, 28930 flow. Second operand 48 states and 2670 transitions. [2021-10-13 22:54:07,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 783 places, 648 transitions, 38150 flow [2021-10-13 22:54:10,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 747 places, 648 transitions, 36622 flow, removed 390 selfloop flow, removed 36 redundant places. [2021-10-13 22:54:10,917 INFO L242 Difference]: Finished difference. Result has 757 places, 595 transitions, 29950 flow [2021-10-13 22:54:10,918 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=27786, PETRI_DIFFERENCE_MINUEND_PLACES=700, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=454, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=29950, PETRI_PLACES=757, PETRI_TRANSITIONS=595} [2021-10-13 22:54:10,918 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 691 predicate places. [2021-10-13 22:54:10,918 INFO L470 AbstractCegarLoop]: Abstraction has has 757 places, 595 transitions, 29950 flow [2021-10-13 22:54:10,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.083333333333336) internal successors, (1298), 24 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:10,918 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:54:10,919 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:54:10,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-10-13 22:54:11,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:54:11,119 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:54:11,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:54:11,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1154914880, now seen corresponding path program 81 times [2021-10-13 22:54:11,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:54:11,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024892821] [2021-10-13 22:54:11,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:54:11,120 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:54:11,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:54:11,327 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:54:11,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:54:11,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024892821] [2021-10-13 22:54:11,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024892821] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:54:11,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161625307] [2021-10-13 22:54:11,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:54:11,327 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:54:11,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:54:11,329 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:54:11,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-10-13 22:54:13,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-10-13 22:54:13,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:54:13,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 22:54:13,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:54:14,245 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:54:14,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161625307] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:54:14,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:54:14,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-10-13 22:54:14,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850216776] [2021-10-13 22:54:14,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:54:14,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:54:14,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:54:14,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:54:14,247 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:54:14,247 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 757 places, 595 transitions, 29950 flow. Second operand has 23 states, 23 states have (on average 54.04347826086956) internal successors, (1243), 23 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:14,247 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:54:14,247 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:54:14,247 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:54:15,834 INFO L129 PetriNetUnfolder]: 499/3712 cut-off events. [2021-10-13 22:54:15,834 INFO L130 PetriNetUnfolder]: For 983022/983842 co-relation queries the response was YES. [2021-10-13 22:54:15,907 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44572 conditions, 3712 events. 499/3712 cut-off events. For 983022/983842 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 34620 event pairs, 0 based on Foata normal form. 73/3387 useless extension candidates. Maximal degree in co-relation 44230. Up to 826 conditions per place. [2021-10-13 22:54:16,050 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 516 selfloop transitions, 63 changer transitions 8/631 dead transitions. [2021-10-13 22:54:16,050 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 778 places, 631 transitions, 35472 flow [2021-10-13 22:54:16,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-13 22:54:16,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-10-13 22:54:16,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1496 transitions. [2021-10-13 22:54:16,051 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8395061728395061 [2021-10-13 22:54:16,052 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1496 transitions. [2021-10-13 22:54:16,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1496 transitions. [2021-10-13 22:54:16,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:54:16,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1496 transitions. [2021-10-13 22:54:16,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 55.407407407407405) internal successors, (1496), 27 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:16,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 66.0) internal successors, (1848), 28 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:16,054 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 66.0) internal successors, (1848), 28 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:16,054 INFO L186 Difference]: Start difference. First operand has 757 places, 595 transitions, 29950 flow. Second operand 27 states and 1496 transitions. [2021-10-13 22:54:16,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 778 places, 631 transitions, 35472 flow [2021-10-13 22:54:19,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 738 places, 631 transitions, 33621 flow, removed 527 selfloop flow, removed 40 redundant places. [2021-10-13 22:54:19,973 INFO L242 Difference]: Finished difference. Result has 743 places, 597 transitions, 28639 flow [2021-10-13 22:54:19,973 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=28213, PETRI_DIFFERENCE_MINUEND_PLACES=712, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=28639, PETRI_PLACES=743, PETRI_TRANSITIONS=597} [2021-10-13 22:54:19,974 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 677 predicate places. [2021-10-13 22:54:19,974 INFO L470 AbstractCegarLoop]: Abstraction has has 743 places, 597 transitions, 28639 flow [2021-10-13 22:54:19,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.04347826086956) internal successors, (1243), 23 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:19,974 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:54:19,974 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:54:20,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-10-13 22:54:20,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-10-13 22:54:20,175 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:54:20,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:54:20,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1586351402, now seen corresponding path program 82 times [2021-10-13 22:54:20,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:54:20,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381925724] [2021-10-13 22:54:20,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:54:20,175 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:54:20,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:54:20,396 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:54:20,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:54:20,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381925724] [2021-10-13 22:54:20,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381925724] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:54:20,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816633907] [2021-10-13 22:54:20,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:54:20,397 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:54:20,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:54:20,398 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:54:20,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-10-13 22:54:23,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:54:23,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:54:23,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 22:54:23,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:54:23,478 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:54:23,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816633907] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:54:23,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:54:23,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-10-13 22:54:23,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5778222] [2021-10-13 22:54:23,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:54:23,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:54:23,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:54:23,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:54:23,479 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:54:23,480 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 743 places, 597 transitions, 28639 flow. Second operand has 23 states, 23 states have (on average 54.04347826086956) internal successors, (1243), 23 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:23,480 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:54:23,480 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:54:23,480 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:54:25,223 INFO L129 PetriNetUnfolder]: 501/3723 cut-off events. [2021-10-13 22:54:25,223 INFO L130 PetriNetUnfolder]: For 971644/972440 co-relation queries the response was YES. [2021-10-13 22:54:25,284 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44030 conditions, 3723 events. 501/3723 cut-off events. For 971644/972440 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 34756 event pairs, 0 based on Foata normal form. 92/3416 useless extension candidates. Maximal degree in co-relation 43687. Up to 716 conditions per place. [2021-10-13 22:54:25,312 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 415 selfloop transitions, 167 changer transitions 8/634 dead transitions. [2021-10-13 22:54:25,312 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 769 places, 634 transitions, 34451 flow [2021-10-13 22:54:25,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 22:54:25,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-10-13 22:54:25,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1661 transitions. [2021-10-13 22:54:25,314 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8388888888888889 [2021-10-13 22:54:25,314 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1661 transitions. [2021-10-13 22:54:25,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1661 transitions. [2021-10-13 22:54:25,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:54:25,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1661 transitions. [2021-10-13 22:54:25,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 55.36666666666667) internal successors, (1661), 30 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:25,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:25,316 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:25,316 INFO L186 Difference]: Start difference. First operand has 743 places, 597 transitions, 28639 flow. Second operand 30 states and 1661 transitions. [2021-10-13 22:54:25,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 769 places, 634 transitions, 34451 flow [2021-10-13 22:54:28,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 744 places, 634 transitions, 33985 flow, removed 170 selfloop flow, removed 25 redundant places. [2021-10-13 22:54:28,816 INFO L242 Difference]: Finished difference. Result has 749 places, 599 transitions, 28981 flow [2021-10-13 22:54:28,817 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=28339, PETRI_DIFFERENCE_MINUEND_PLACES=715, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=28981, PETRI_PLACES=749, PETRI_TRANSITIONS=599} [2021-10-13 22:54:28,817 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 683 predicate places. [2021-10-13 22:54:28,817 INFO L470 AbstractCegarLoop]: Abstraction has has 749 places, 599 transitions, 28981 flow [2021-10-13 22:54:28,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.04347826086956) internal successors, (1243), 23 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:28,817 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:54:28,817 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:54:28,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-10-13 22:54:29,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:54:29,018 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:54:29,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:54:29,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1419435612, now seen corresponding path program 83 times [2021-10-13 22:54:29,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:54:29,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645706183] [2021-10-13 22:54:29,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:54:29,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:54:29,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:54:29,244 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:54:29,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:54:29,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645706183] [2021-10-13 22:54:29,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645706183] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:54:29,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653721940] [2021-10-13 22:54:29,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:54:29,245 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:54:29,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:54:29,247 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:54:29,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-10-13 22:54:31,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-10-13 22:54:31,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:54:31,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 22:54:31,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:54:32,380 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 4 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:54:32,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653721940] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:54:32,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:54:32,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-10-13 22:54:32,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186580452] [2021-10-13 22:54:32,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 22:54:32,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:54:32,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 22:54:32,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-10-13 22:54:32,382 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:54:32,382 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 749 places, 599 transitions, 28981 flow. Second operand has 24 states, 24 states have (on average 54.083333333333336) internal successors, (1298), 24 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:32,382 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:54:32,382 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:54:32,382 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:54:34,137 INFO L129 PetriNetUnfolder]: 505/3766 cut-off events. [2021-10-13 22:54:34,137 INFO L130 PetriNetUnfolder]: For 972181/972922 co-relation queries the response was YES. [2021-10-13 22:54:34,225 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44453 conditions, 3766 events. 505/3766 cut-off events. For 972181/972922 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 35159 event pairs, 0 based on Foata normal form. 107/3469 useless extension candidates. Maximal degree in co-relation 44108. Up to 724 conditions per place. [2021-10-13 22:54:34,256 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 368 selfloop transitions, 219 changer transitions 8/639 dead transitions. [2021-10-13 22:54:34,256 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 778 places, 639 transitions, 35053 flow [2021-10-13 22:54:34,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-13 22:54:34,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-10-13 22:54:34,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1828 transitions. [2021-10-13 22:54:34,257 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8393021120293848 [2021-10-13 22:54:34,257 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1828 transitions. [2021-10-13 22:54:34,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1828 transitions. [2021-10-13 22:54:34,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:54:34,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1828 transitions. [2021-10-13 22:54:34,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 55.39393939393939) internal successors, (1828), 33 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:34,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 66.0) internal successors, (2244), 34 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:34,260 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 66.0) internal successors, (2244), 34 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:34,260 INFO L186 Difference]: Start difference. First operand has 749 places, 599 transitions, 28981 flow. Second operand 33 states and 1828 transitions. [2021-10-13 22:54:34,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 778 places, 639 transitions, 35053 flow [2021-10-13 22:54:38,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 751 places, 639 transitions, 34439 flow, removed 149 selfloop flow, removed 27 redundant places. [2021-10-13 22:54:38,335 INFO L242 Difference]: Finished difference. Result has 756 places, 603 transitions, 29407 flow [2021-10-13 22:54:38,336 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=28503, PETRI_DIFFERENCE_MINUEND_PLACES=719, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=29407, PETRI_PLACES=756, PETRI_TRANSITIONS=603} [2021-10-13 22:54:38,336 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 690 predicate places. [2021-10-13 22:54:38,336 INFO L470 AbstractCegarLoop]: Abstraction has has 756 places, 603 transitions, 29407 flow [2021-10-13 22:54:38,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.083333333333336) internal successors, (1298), 24 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:38,336 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:54:38,337 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:54:38,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-10-13 22:54:38,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:54:38,537 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:54:38,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:54:38,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1612210944, now seen corresponding path program 84 times [2021-10-13 22:54:38,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:54:38,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173140945] [2021-10-13 22:54:38,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:54:38,538 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:54:38,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:54:38,727 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:54:38,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:54:38,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173140945] [2021-10-13 22:54:38,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173140945] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:54:38,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988364215] [2021-10-13 22:54:38,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:54:38,728 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:54:38,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:54:38,728 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:54:38,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-10-13 22:54:41,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-10-13 22:54:41,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:54:41,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 22:54:41,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:54:41,826 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:54:41,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988364215] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:54:41,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:54:41,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-10-13 22:54:41,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43334156] [2021-10-13 22:54:41,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:54:41,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:54:41,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:54:41,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:54:41,827 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:54:41,828 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 756 places, 603 transitions, 29407 flow. Second operand has 23 states, 23 states have (on average 54.04347826086956) internal successors, (1243), 23 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:41,828 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:54:41,828 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:54:41,828 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:54:43,788 INFO L129 PetriNetUnfolder]: 513/3831 cut-off events. [2021-10-13 22:54:43,788 INFO L130 PetriNetUnfolder]: For 993809/994600 co-relation queries the response was YES. [2021-10-13 22:54:43,864 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45455 conditions, 3831 events. 513/3831 cut-off events. For 993809/994600 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 36017 event pairs, 0 based on Foata normal form. 142/3562 useless extension candidates. Maximal degree in co-relation 45108. Up to 740 conditions per place. [2021-10-13 22:54:43,896 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 262 selfloop transitions, 336 changer transitions 8/650 dead transitions. [2021-10-13 22:54:43,896 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 786 places, 650 transitions, 36238 flow [2021-10-13 22:54:43,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-13 22:54:43,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-10-13 22:54:43,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1885 transitions. [2021-10-13 22:54:43,898 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8400178253119429 [2021-10-13 22:54:43,898 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1885 transitions. [2021-10-13 22:54:43,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1885 transitions. [2021-10-13 22:54:43,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:54:43,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1885 transitions. [2021-10-13 22:54:43,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 55.44117647058823) internal successors, (1885), 34 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:43,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 66.0) internal successors, (2310), 35 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:43,900 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 66.0) internal successors, (2310), 35 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:43,900 INFO L186 Difference]: Start difference. First operand has 756 places, 603 transitions, 29407 flow. Second operand 34 states and 1885 transitions. [2021-10-13 22:54:43,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 786 places, 650 transitions, 36238 flow [2021-10-13 22:54:48,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 756 places, 650 transitions, 35508 flow, removed 159 selfloop flow, removed 30 redundant places. [2021-10-13 22:54:48,237 INFO L242 Difference]: Finished difference. Result has 767 places, 611 transitions, 30462 flow [2021-10-13 22:54:48,238 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=28825, PETRI_DIFFERENCE_MINUEND_PLACES=723, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=328, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=30462, PETRI_PLACES=767, PETRI_TRANSITIONS=611} [2021-10-13 22:54:48,238 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 701 predicate places. [2021-10-13 22:54:48,238 INFO L470 AbstractCegarLoop]: Abstraction has has 767 places, 611 transitions, 30462 flow [2021-10-13 22:54:48,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.04347826086956) internal successors, (1243), 23 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:48,238 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:54:48,238 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:54:48,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-10-13 22:54:48,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:54:48,439 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:54:48,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:54:48,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1823751528, now seen corresponding path program 85 times [2021-10-13 22:54:48,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:54:48,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165726321] [2021-10-13 22:54:48,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:54:48,440 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:54:48,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:54:48,608 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:54:48,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:54:48,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165726321] [2021-10-13 22:54:48,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165726321] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:54:48,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315643354] [2021-10-13 22:54:48,609 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:54:48,609 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:54:48,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:54:48,609 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:54:48,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-10-13 22:54:51,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:54:51,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 22:54:51,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:54:51,615 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:54:51,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315643354] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:54:51,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:54:51,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-10-13 22:54:51,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443752698] [2021-10-13 22:54:51,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:54:51,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:54:51,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:54:51,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:54:51,616 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:54:51,617 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 767 places, 611 transitions, 30462 flow. Second operand has 23 states, 23 states have (on average 54.04347826086956) internal successors, (1243), 23 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:51,617 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:54:51,617 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:54:51,617 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:54:53,678 INFO L129 PetriNetUnfolder]: 521/3910 cut-off events. [2021-10-13 22:54:53,678 INFO L130 PetriNetUnfolder]: For 1014521/1015262 co-relation queries the response was YES. [2021-10-13 22:54:53,786 INFO L84 FinitePrefix]: Finished finitePrefix Result has 46599 conditions, 3910 events. 521/3910 cut-off events. For 1014521/1015262 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 36872 event pairs, 0 based on Foata normal form. 170/3660 useless extension candidates. Maximal degree in co-relation 46244. Up to 756 conditions per place. [2021-10-13 22:54:53,817 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 179 selfloop transitions, 431 changer transitions 8/662 dead transitions. [2021-10-13 22:54:53,818 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 801 places, 662 transitions, 37819 flow [2021-10-13 22:54:53,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-13 22:54:53,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-10-13 22:54:53,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2109 transitions. [2021-10-13 22:54:53,819 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8409090909090909 [2021-10-13 22:54:53,819 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2109 transitions. [2021-10-13 22:54:53,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2109 transitions. [2021-10-13 22:54:53,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:54:53,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2109 transitions. [2021-10-13 22:54:53,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 55.5) internal successors, (2109), 38 states have internal predecessors, (2109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:53,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 66.0) internal successors, (2574), 39 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:53,822 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 66.0) internal successors, (2574), 39 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:53,822 INFO L186 Difference]: Start difference. First operand has 767 places, 611 transitions, 30462 flow. Second operand 38 states and 2109 transitions. [2021-10-13 22:54:53,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 801 places, 662 transitions, 37819 flow [2021-10-13 22:54:58,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 777 places, 662 transitions, 37055 flow, removed 173 selfloop flow, removed 24 redundant places. [2021-10-13 22:54:58,459 INFO L242 Difference]: Finished difference. Result has 784 places, 619 transitions, 31563 flow [2021-10-13 22:54:58,460 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=29862, PETRI_DIFFERENCE_MINUEND_PLACES=740, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=423, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=31563, PETRI_PLACES=784, PETRI_TRANSITIONS=619} [2021-10-13 22:54:58,460 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 718 predicate places. [2021-10-13 22:54:58,460 INFO L470 AbstractCegarLoop]: Abstraction has has 784 places, 619 transitions, 31563 flow [2021-10-13 22:54:58,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.04347826086956) internal successors, (1243), 23 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:58,460 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:54:58,460 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:54:58,486 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2021-10-13 22:54:58,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-10-13 22:54:58,661 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:54:58,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:54:58,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1518941966, now seen corresponding path program 86 times [2021-10-13 22:54:58,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:54:58,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761846360] [2021-10-13 22:54:58,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:54:58,662 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:54:58,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:54:58,847 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:54:58,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:54:58,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761846360] [2021-10-13 22:54:58,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761846360] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:54:58,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547328027] [2021-10-13 22:54:58,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:54:58,848 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:54:58,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:54:58,848 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:54:58,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-10-13 22:55:01,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:55:01,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:55:01,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 22:55:01,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:55:01,940 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:55:01,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547328027] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:55:01,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:55:01,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-10-13 22:55:01,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628771500] [2021-10-13 22:55:01,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:55:01,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:55:01,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:55:01,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:55:01,941 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:55:01,942 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 784 places, 619 transitions, 31563 flow. Second operand has 23 states, 23 states have (on average 54.04347826086956) internal successors, (1243), 23 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:01,942 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:55:01,942 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:55:01,942 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:55:04,127 INFO L129 PetriNetUnfolder]: 525/3939 cut-off events. [2021-10-13 22:55:04,127 INFO L130 PetriNetUnfolder]: For 1027061/1027829 co-relation queries the response was YES. [2021-10-13 22:55:04,201 INFO L84 FinitePrefix]: Finished finitePrefix Result has 47324 conditions, 3939 events. 525/3939 cut-off events. For 1027061/1027829 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 37246 event pairs, 0 based on Foata normal form. 193/3709 useless extension candidates. Maximal degree in co-relation 46965. Up to 764 conditions per place. [2021-10-13 22:55:04,233 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 141 selfloop transitions, 475 changer transitions 8/668 dead transitions. [2021-10-13 22:55:04,234 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 820 places, 668 transitions, 38927 flow [2021-10-13 22:55:04,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-13 22:55:04,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-10-13 22:55:04,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2221 transitions. [2021-10-13 22:55:04,235 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8412878787878788 [2021-10-13 22:55:04,235 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2221 transitions. [2021-10-13 22:55:04,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2221 transitions. [2021-10-13 22:55:04,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:55:04,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2221 transitions. [2021-10-13 22:55:04,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 55.525) internal successors, (2221), 40 states have internal predecessors, (2221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:04,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 66.0) internal successors, (2706), 41 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:04,238 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 66.0) internal successors, (2706), 41 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:04,238 INFO L186 Difference]: Start difference. First operand has 784 places, 619 transitions, 31563 flow. Second operand 40 states and 2221 transitions. [2021-10-13 22:55:04,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 820 places, 668 transitions, 38927 flow [2021-10-13 22:55:10,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 787 places, 668 transitions, 37848 flow, removed 171 selfloop flow, removed 33 redundant places. [2021-10-13 22:55:10,110 INFO L242 Difference]: Finished difference. Result has 792 places, 623 transitions, 32091 flow [2021-10-13 22:55:10,110 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=30656, PETRI_DIFFERENCE_MINUEND_PLACES=748, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=471, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=32091, PETRI_PLACES=792, PETRI_TRANSITIONS=623} [2021-10-13 22:55:10,110 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 726 predicate places. [2021-10-13 22:55:10,110 INFO L470 AbstractCegarLoop]: Abstraction has has 792 places, 623 transitions, 32091 flow [2021-10-13 22:55:10,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.04347826086956) internal successors, (1243), 23 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:10,111 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:55:10,111 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:55:10,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-10-13 22:55:10,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:55:10,311 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:55:10,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:55:10,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1524626924, now seen corresponding path program 87 times [2021-10-13 22:55:10,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:55:10,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625384109] [2021-10-13 22:55:10,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:55:10,312 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:55:10,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:55:10,480 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:55:10,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:55:10,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625384109] [2021-10-13 22:55:10,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625384109] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:55:10,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570923259] [2021-10-13 22:55:10,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:55:10,481 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:55:10,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:55:10,482 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:55:10,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-10-13 22:55:13,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-10-13 22:55:13,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:55:13,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 22:55:13,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:55:13,529 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:55:13,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570923259] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:55:13,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:55:13,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-10-13 22:55:13,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668788348] [2021-10-13 22:55:13,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 22:55:13,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:55:13,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 22:55:13,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-10-13 22:55:13,531 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:55:13,531 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 792 places, 623 transitions, 32091 flow. Second operand has 24 states, 24 states have (on average 54.083333333333336) internal successors, (1298), 24 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:13,531 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:55:13,531 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:55:13,531 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:55:15,801 INFO L129 PetriNetUnfolder]: 531/3963 cut-off events. [2021-10-13 22:55:15,801 INFO L130 PetriNetUnfolder]: For 1040829/1041659 co-relation queries the response was YES. [2021-10-13 22:55:15,877 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48011 conditions, 3963 events. 531/3963 cut-off events. For 1040829/1041659 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 37408 event pairs, 0 based on Foata normal form. 206/3748 useless extension candidates. Maximal degree in co-relation 47650. Up to 774 conditions per place. [2021-10-13 22:55:15,909 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 109 selfloop transitions, 520 changer transitions 8/681 dead transitions. [2021-10-13 22:55:15,909 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 832 places, 681 transitions, 40422 flow [2021-10-13 22:55:15,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-13 22:55:15,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-10-13 22:55:15,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2446 transitions. [2021-10-13 22:55:15,910 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8422865013774105 [2021-10-13 22:55:15,910 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2446 transitions. [2021-10-13 22:55:15,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2446 transitions. [2021-10-13 22:55:15,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:55:15,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2446 transitions. [2021-10-13 22:55:15,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 55.59090909090909) internal successors, (2446), 44 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:15,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 66.0) internal successors, (2970), 45 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:15,913 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 66.0) internal successors, (2970), 45 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:15,913 INFO L186 Difference]: Start difference. First operand has 792 places, 623 transitions, 32091 flow. Second operand 44 states and 2446 transitions. [2021-10-13 22:55:15,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 832 places, 681 transitions, 40422 flow [2021-10-13 22:55:20,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 795 places, 681 transitions, 39165 flow, removed 185 selfloop flow, removed 37 redundant places. [2021-10-13 22:55:20,587 INFO L242 Difference]: Finished difference. Result has 802 places, 629 transitions, 32819 flow [2021-10-13 22:55:20,588 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=31034, PETRI_DIFFERENCE_MINUEND_PLACES=752, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=515, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=32819, PETRI_PLACES=802, PETRI_TRANSITIONS=629} [2021-10-13 22:55:20,588 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 736 predicate places. [2021-10-13 22:55:20,588 INFO L470 AbstractCegarLoop]: Abstraction has has 802 places, 629 transitions, 32819 flow [2021-10-13 22:55:20,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.083333333333336) internal successors, (1298), 24 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:20,588 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:55:20,588 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:55:20,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-10-13 22:55:20,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:55:20,789 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:55:20,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:55:20,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1867568503, now seen corresponding path program 88 times [2021-10-13 22:55:20,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:55:20,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829572177] [2021-10-13 22:55:20,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:55:20,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:55:20,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:55:21,034 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:55:21,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:55:21,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829572177] [2021-10-13 22:55:21,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829572177] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:55:21,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298478866] [2021-10-13 22:55:21,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:55:21,035 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:55:21,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:55:21,036 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:55:21,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-10-13 22:55:23,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:55:23,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:55:23,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 22:55:23,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:55:24,323 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:55:24,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298478866] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:55:24,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:55:24,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-10-13 22:55:24,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458510086] [2021-10-13 22:55:24,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 22:55:24,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:55:24,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 22:55:24,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2021-10-13 22:55:24,325 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:55:24,325 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 802 places, 629 transitions, 32819 flow. Second operand has 24 states, 24 states have (on average 54.041666666666664) internal successors, (1297), 24 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:24,325 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:55:24,325 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:55:24,325 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:55:26,463 INFO L129 PetriNetUnfolder]: 533/4016 cut-off events. [2021-10-13 22:55:26,463 INFO L130 PetriNetUnfolder]: For 1068947/1069648 co-relation queries the response was YES. [2021-10-13 22:55:26,539 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48782 conditions, 4016 events. 533/4016 cut-off events. For 1068947/1069648 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 37942 event pairs, 0 based on Foata normal form. 77/3663 useless extension candidates. Maximal degree in co-relation 48417. Up to 947 conditions per place. [2021-10-13 22:55:26,572 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 577 selfloop transitions, 33 changer transitions 8/662 dead transitions. [2021-10-13 22:55:26,573 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 825 places, 662 transitions, 38417 flow [2021-10-13 22:55:26,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-13 22:55:26,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-10-13 22:55:26,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1495 transitions. [2021-10-13 22:55:26,574 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8389450056116723 [2021-10-13 22:55:26,574 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1495 transitions. [2021-10-13 22:55:26,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1495 transitions. [2021-10-13 22:55:26,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:55:26,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1495 transitions. [2021-10-13 22:55:26,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 55.370370370370374) internal successors, (1495), 27 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:26,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 66.0) internal successors, (1848), 28 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:26,576 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 66.0) internal successors, (1848), 28 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:26,576 INFO L186 Difference]: Start difference. First operand has 802 places, 629 transitions, 32819 flow. Second operand 27 states and 1495 transitions. [2021-10-13 22:55:26,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 825 places, 662 transitions, 38417 flow [2021-10-13 22:55:32,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 789 places, 662 transitions, 37076 flow, removed 206 selfloop flow, removed 36 redundant places. [2021-10-13 22:55:32,267 INFO L242 Difference]: Finished difference. Result has 794 places, 631 transitions, 31904 flow [2021-10-13 22:55:32,267 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=31536, PETRI_DIFFERENCE_MINUEND_PLACES=763, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=31904, PETRI_PLACES=794, PETRI_TRANSITIONS=631} [2021-10-13 22:55:32,268 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 728 predicate places. [2021-10-13 22:55:32,268 INFO L470 AbstractCegarLoop]: Abstraction has has 794 places, 631 transitions, 31904 flow [2021-10-13 22:55:32,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.041666666666664) internal successors, (1297), 24 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:32,268 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:55:32,268 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:55:32,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-10-13 22:55:32,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:55:32,495 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:55:32,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:55:32,496 INFO L82 PathProgramCache]: Analyzing trace with hash -477249961, now seen corresponding path program 89 times [2021-10-13 22:55:32,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:55:32,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864773991] [2021-10-13 22:55:32,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:55:32,496 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:55:32,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:55:32,747 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:55:32,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:55:32,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864773991] [2021-10-13 22:55:32,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864773991] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:55:32,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499605244] [2021-10-13 22:55:32,748 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:55:32,748 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:55:32,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:55:32,748 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:55:32,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-10-13 22:55:36,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-10-13 22:55:36,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:55:36,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 22:55:36,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:55:36,555 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:55:36,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499605244] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:55:36,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:55:36,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-10-13 22:55:36,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646352983] [2021-10-13 22:55:36,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 22:55:36,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:55:36,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 22:55:36,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-10-13 22:55:36,556 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:55:36,557 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 794 places, 631 transitions, 31904 flow. Second operand has 24 states, 24 states have (on average 54.041666666666664) internal successors, (1297), 24 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:36,557 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:55:36,557 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:55:36,557 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:55:38,733 INFO L129 PetriNetUnfolder]: 535/4034 cut-off events. [2021-10-13 22:55:38,733 INFO L130 PetriNetUnfolder]: For 1101635/1102341 co-relation queries the response was YES. [2021-10-13 22:55:38,809 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48879 conditions, 4034 events. 535/4034 cut-off events. For 1101635/1102341 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 38035 event pairs, 0 based on Foata normal form. 81/3683 useless extension candidates. Maximal degree in co-relation 48513. Up to 858 conditions per place. [2021-10-13 22:55:38,843 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 532 selfloop transitions, 82 changer transitions 8/666 dead transitions. [2021-10-13 22:55:38,843 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 821 places, 666 transitions, 37864 flow [2021-10-13 22:55:38,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-13 22:55:38,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-13 22:55:38,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1718 transitions. [2021-10-13 22:55:38,844 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8396871945259042 [2021-10-13 22:55:38,844 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1718 transitions. [2021-10-13 22:55:38,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1718 transitions. [2021-10-13 22:55:38,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:55:38,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1718 transitions. [2021-10-13 22:55:38,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 55.41935483870968) internal successors, (1718), 31 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:38,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 66.0) internal successors, (2112), 32 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:38,847 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 66.0) internal successors, (2112), 32 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:38,847 INFO L186 Difference]: Start difference. First operand has 794 places, 631 transitions, 31904 flow. Second operand 31 states and 1718 transitions. [2021-10-13 22:55:38,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 821 places, 666 transitions, 37864 flow [2021-10-13 22:55:43,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 797 places, 666 transitions, 37492 flow, removed 155 selfloop flow, removed 24 redundant places. [2021-10-13 22:55:43,935 INFO L242 Difference]: Finished difference. Result has 802 places, 633 transitions, 32134 flow [2021-10-13 22:55:43,935 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=31664, PETRI_DIFFERENCE_MINUEND_PLACES=767, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=32134, PETRI_PLACES=802, PETRI_TRANSITIONS=633} [2021-10-13 22:55:43,935 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 736 predicate places. [2021-10-13 22:55:43,935 INFO L470 AbstractCegarLoop]: Abstraction has has 802 places, 633 transitions, 32134 flow [2021-10-13 22:55:43,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.041666666666664) internal successors, (1297), 24 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:43,936 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:55:43,936 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:55:43,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-10-13 22:55:44,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:55:44,136 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:55:44,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:55:44,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1001698781, now seen corresponding path program 90 times [2021-10-13 22:55:44,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:55:44,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711742206] [2021-10-13 22:55:44,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:55:44,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:55:44,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:55:44,339 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:55:44,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:55:44,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711742206] [2021-10-13 22:55:44,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711742206] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:55:44,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066868384] [2021-10-13 22:55:44,340 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:55:44,340 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:55:44,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:55:44,340 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:55:44,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-10-13 22:55:47,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-10-13 22:55:47,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:55:47,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 22:55:47,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:55:47,622 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:55:47,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066868384] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:55:47,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:55:47,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-10-13 22:55:47,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428490427] [2021-10-13 22:55:47,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 22:55:47,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:55:47,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 22:55:47,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-10-13 22:55:47,624 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:55:47,624 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 802 places, 633 transitions, 32134 flow. Second operand has 24 states, 24 states have (on average 54.041666666666664) internal successors, (1297), 24 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:47,624 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:55:47,625 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:55:47,625 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:55:49,860 INFO L129 PetriNetUnfolder]: 537/4052 cut-off events. [2021-10-13 22:55:49,860 INFO L130 PetriNetUnfolder]: For 1104202/1104908 co-relation queries the response was YES. [2021-10-13 22:55:49,934 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49158 conditions, 4052 events. 537/4052 cut-off events. For 1104202/1104908 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 38204 event pairs, 0 based on Foata normal form. 125/3743 useless extension candidates. Maximal degree in co-relation 48790. Up to 786 conditions per place. [2021-10-13 22:55:49,966 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 359 selfloop transitions, 261 changer transitions 8/672 dead transitions. [2021-10-13 22:55:49,966 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 834 places, 672 transitions, 38682 flow [2021-10-13 22:55:49,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-13 22:55:49,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-10-13 22:55:49,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1995 transitions. [2021-10-13 22:55:49,968 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8396464646464646 [2021-10-13 22:55:49,968 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1995 transitions. [2021-10-13 22:55:49,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1995 transitions. [2021-10-13 22:55:49,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:55:49,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1995 transitions. [2021-10-13 22:55:49,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 55.416666666666664) internal successors, (1995), 36 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:49,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:49,970 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:49,970 INFO L186 Difference]: Start difference. First operand has 802 places, 633 transitions, 32134 flow. Second operand 36 states and 1995 transitions. [2021-10-13 22:55:49,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 834 places, 672 transitions, 38682 flow [2021-10-13 22:55:55,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 806 places, 672 transitions, 38204 flow, removed 161 selfloop flow, removed 28 redundant places. [2021-10-13 22:55:55,751 INFO L242 Difference]: Finished difference. Result has 811 places, 635 transitions, 32649 flow [2021-10-13 22:55:55,752 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=31804, PETRI_DIFFERENCE_MINUEND_PLACES=771, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=32649, PETRI_PLACES=811, PETRI_TRANSITIONS=635} [2021-10-13 22:55:55,752 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 745 predicate places. [2021-10-13 22:55:55,752 INFO L470 AbstractCegarLoop]: Abstraction has has 811 places, 635 transitions, 32649 flow [2021-10-13 22:55:55,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.041666666666664) internal successors, (1297), 24 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:55,752 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:55:55,752 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:55:55,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-10-13 22:55:55,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-10-13 22:55:55,953 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:55:55,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:55:55,953 INFO L82 PathProgramCache]: Analyzing trace with hash -451492871, now seen corresponding path program 91 times [2021-10-13 22:55:55,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:55:55,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34939802] [2021-10-13 22:55:55,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:55:55,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:55:55,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:55:56,193 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:55:56,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:55:56,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34939802] [2021-10-13 22:55:56,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34939802] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:55:56,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428997574] [2021-10-13 22:55:56,194 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:55:56,194 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:55:56,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:55:56,195 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:55:56,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-10-13 22:55:59,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:55:59,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 22:55:59,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:55:59,586 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:55:59,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428997574] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:55:59,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:55:59,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-10-13 22:55:59,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339582498] [2021-10-13 22:55:59,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 22:55:59,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:55:59,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 22:55:59,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-10-13 22:55:59,587 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:55:59,588 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 811 places, 635 transitions, 32649 flow. Second operand has 25 states, 25 states have (on average 54.08) internal successors, (1352), 25 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:59,588 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:55:59,588 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:55:59,588 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:56:01,669 INFO L129 PetriNetUnfolder]: 539/4070 cut-off events. [2021-10-13 22:56:01,669 INFO L130 PetriNetUnfolder]: For 1111781/1112487 co-relation queries the response was YES. [2021-10-13 22:56:01,765 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49579 conditions, 4070 events. 539/4070 cut-off events. For 1111781/1112487 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 38420 event pairs, 0 based on Foata normal form. 130/3764 useless extension candidates. Maximal degree in co-relation 49208. Up to 790 conditions per place. [2021-10-13 22:56:01,940 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 324 selfloop transitions, 299 changer transitions 8/675 dead transitions. [2021-10-13 22:56:01,940 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 844 places, 675 transitions, 39345 flow [2021-10-13 22:56:01,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-13 22:56:01,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-10-13 22:56:01,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2051 transitions. [2021-10-13 22:56:01,941 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8398853398853399 [2021-10-13 22:56:01,941 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2051 transitions. [2021-10-13 22:56:01,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2051 transitions. [2021-10-13 22:56:01,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:56:01,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2051 transitions. [2021-10-13 22:56:01,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 55.432432432432435) internal successors, (2051), 37 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:56:01,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 66.0) internal successors, (2508), 38 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:56:01,944 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 66.0) internal successors, (2508), 38 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:56:01,944 INFO L186 Difference]: Start difference. First operand has 811 places, 635 transitions, 32649 flow. Second operand 37 states and 2051 transitions. [2021-10-13 22:56:01,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 844 places, 675 transitions, 39345 flow [2021-10-13 22:56:07,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 812 places, 675 transitions, 38537 flow, removed 167 selfloop flow, removed 32 redundant places. [2021-10-13 22:56:07,863 INFO L242 Difference]: Finished difference. Result has 817 places, 637 transitions, 32922 flow [2021-10-13 22:56:07,864 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=31993, PETRI_DIFFERENCE_MINUEND_PLACES=776, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=297, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=32922, PETRI_PLACES=817, PETRI_TRANSITIONS=637} [2021-10-13 22:56:07,864 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 751 predicate places. [2021-10-13 22:56:07,864 INFO L470 AbstractCegarLoop]: Abstraction has has 817 places, 637 transitions, 32922 flow [2021-10-13 22:56:07,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.08) internal successors, (1352), 25 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:56:07,864 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:56:07,864 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:56:07,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-10-13 22:56:08,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-10-13 22:56:08,079 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:56:08,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:56:08,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1887708343, now seen corresponding path program 92 times [2021-10-13 22:56:08,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:56:08,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423814902] [2021-10-13 22:56:08,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:56:08,080 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:56:08,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:56:08,294 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:56:08,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:56:08,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423814902] [2021-10-13 22:56:08,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423814902] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:56:08,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74477283] [2021-10-13 22:56:08,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:56:08,295 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:56:08,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:56:08,295 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:56:08,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-10-13 22:56:11,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:56:11,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:56:11,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 22:56:11,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:56:11,631 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:56:11,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74477283] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:56:11,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:56:11,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-10-13 22:56:11,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685549314] [2021-10-13 22:56:11,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 22:56:11,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:56:11,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 22:56:11,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-10-13 22:56:11,632 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:56:11,633 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 817 places, 637 transitions, 32922 flow. Second operand has 24 states, 24 states have (on average 54.041666666666664) internal successors, (1297), 24 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:56:11,633 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:56:11,633 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:56:11,633 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:56:13,984 INFO L129 PetriNetUnfolder]: 541/4081 cut-off events. [2021-10-13 22:56:13,984 INFO L130 PetriNetUnfolder]: For 1116840/1117598 co-relation queries the response was YES. [2021-10-13 22:56:14,065 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49874 conditions, 4081 events. 541/4081 cut-off events. For 1116840/1117598 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 38511 event pairs, 0 based on Foata normal form. 164/3808 useless extension candidates. Maximal degree in co-relation 49501. Up to 794 conditions per place. [2021-10-13 22:56:14,102 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 236 selfloop transitions, 390 changer transitions 8/678 dead transitions. [2021-10-13 22:56:14,102 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 853 places, 678 transitions, 40040 flow [2021-10-13 22:56:14,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-13 22:56:14,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-10-13 22:56:14,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2219 transitions. [2021-10-13 22:56:14,104 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8405303030303031 [2021-10-13 22:56:14,104 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2219 transitions. [2021-10-13 22:56:14,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2219 transitions. [2021-10-13 22:56:14,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:56:14,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2219 transitions. [2021-10-13 22:56:14,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 55.475) internal successors, (2219), 40 states have internal predecessors, (2219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:56:14,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 66.0) internal successors, (2706), 41 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:56:14,107 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 66.0) internal successors, (2706), 41 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:56:14,107 INFO L186 Difference]: Start difference. First operand has 817 places, 637 transitions, 32922 flow. Second operand 40 states and 2219 transitions. [2021-10-13 22:56:14,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 853 places, 678 transitions, 40040 flow [2021-10-13 22:56:20,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 819 places, 678 transitions, 39137 flow, removed 169 selfloop flow, removed 34 redundant places. [2021-10-13 22:56:20,142 INFO L242 Difference]: Finished difference. Result has 824 places, 639 transitions, 33306 flow [2021-10-13 22:56:20,143 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=32183, PETRI_DIFFERENCE_MINUEND_PLACES=780, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=388, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=33306, PETRI_PLACES=824, PETRI_TRANSITIONS=639} [2021-10-13 22:56:20,143 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 758 predicate places. [2021-10-13 22:56:20,143 INFO L470 AbstractCegarLoop]: Abstraction has has 824 places, 639 transitions, 33306 flow [2021-10-13 22:56:20,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.041666666666664) internal successors, (1297), 24 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:56:20,143 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:56:20,143 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:56:20,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-10-13 22:56:20,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-10-13 22:56:20,344 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:56:20,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:56:20,344 INFO L82 PathProgramCache]: Analyzing trace with hash -732897131, now seen corresponding path program 93 times [2021-10-13 22:56:20,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:56:20,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155745523] [2021-10-13 22:56:20,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:56:20,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:56:20,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:56:20,536 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:56:20,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:56:20,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155745523] [2021-10-13 22:56:20,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155745523] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:56:20,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004914863] [2021-10-13 22:56:20,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:56:20,537 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:56:20,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:56:20,538 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:56:20,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-10-13 22:56:23,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-10-13 22:56:23,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:56:23,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-13 22:56:23,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:56:24,062 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:56:24,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004914863] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:56:24,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:56:24,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-10-13 22:56:24,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538267066] [2021-10-13 22:56:24,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 22:56:24,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:56:24,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 22:56:24,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-10-13 22:56:24,064 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:56:24,064 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 824 places, 639 transitions, 33306 flow. Second operand has 24 states, 24 states have (on average 54.041666666666664) internal successors, (1297), 24 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:56:24,064 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:56:24,064 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:56:24,064 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:56:26,426 INFO L129 PetriNetUnfolder]: 543/4099 cut-off events. [2021-10-13 22:56:26,427 INFO L130 PetriNetUnfolder]: For 1123595/1124353 co-relation queries the response was YES. [2021-10-13 22:56:26,505 INFO L84 FinitePrefix]: Finished finitePrefix Result has 50230 conditions, 4099 events. 543/4099 cut-off events. For 1123595/1124353 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 38624 event pairs, 0 based on Foata normal form. 183/3843 useless extension candidates. Maximal degree in co-relation 49855. Up to 798 conditions per place. [2021-10-13 22:56:26,539 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 186 selfloop transitions, 444 changer transitions 8/682 dead transitions. [2021-10-13 22:56:26,539 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 862 places, 682 transitions, 40720 flow [2021-10-13 22:56:26,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-13 22:56:26,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-10-13 22:56:26,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2331 transitions. [2021-10-13 22:56:26,540 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8409090909090909 [2021-10-13 22:56:26,540 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2331 transitions. [2021-10-13 22:56:26,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2331 transitions. [2021-10-13 22:56:26,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:56:26,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2331 transitions. [2021-10-13 22:56:26,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 55.5) internal successors, (2331), 42 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:56:26,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 66.0) internal successors, (2838), 43 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:56:26,543 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 66.0) internal successors, (2838), 43 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:56:26,543 INFO L186 Difference]: Start difference. First operand has 824 places, 639 transitions, 33306 flow. Second operand 42 states and 2331 transitions. [2021-10-13 22:56:26,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 862 places, 682 transitions, 40720 flow [2021-10-13 22:56:31,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 831 places, 682 transitions, 39820 flow, removed 175 selfloop flow, removed 31 redundant places. [2021-10-13 22:56:31,942 INFO L242 Difference]: Finished difference. Result has 836 places, 641 transitions, 33822 flow [2021-10-13 22:56:31,943 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=32578, PETRI_DIFFERENCE_MINUEND_PLACES=790, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=442, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=33822, PETRI_PLACES=836, PETRI_TRANSITIONS=641} [2021-10-13 22:56:31,943 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 770 predicate places. [2021-10-13 22:56:31,943 INFO L470 AbstractCegarLoop]: Abstraction has has 836 places, 641 transitions, 33822 flow [2021-10-13 22:56:31,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.041666666666664) internal successors, (1297), 24 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:56:31,943 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:56:31,943 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:56:31,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-10-13 22:56:32,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:56:32,171 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:56:32,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:56:32,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1020269791, now seen corresponding path program 94 times [2021-10-13 22:56:32,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:56:32,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511618231] [2021-10-13 22:56:32,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:56:32,172 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:56:32,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:56:32,350 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:56:32,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:56:32,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511618231] [2021-10-13 22:56:32,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511618231] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:56:32,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012600867] [2021-10-13 22:56:32,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:56:32,351 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:56:32,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:56:32,351 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:56:32,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-10-13 22:56:35,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:56:35,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:56:35,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 22:56:35,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:56:35,856 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:56:35,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012600867] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:56:35,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:56:35,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-10-13 22:56:35,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224897793] [2021-10-13 22:56:35,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 22:56:35,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:56:35,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 22:56:35,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-10-13 22:56:35,857 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:56:35,858 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 836 places, 641 transitions, 33822 flow. Second operand has 24 states, 24 states have (on average 54.041666666666664) internal successors, (1297), 24 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:56:35,858 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:56:35,858 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:56:35,858 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:56:38,123 INFO L129 PetriNetUnfolder]: 549/4153 cut-off events. [2021-10-13 22:56:38,123 INFO L130 PetriNetUnfolder]: For 1142839/1143559 co-relation queries the response was YES. [2021-10-13 22:56:38,219 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51114 conditions, 4153 events. 549/4153 cut-off events. For 1142839/1143559 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 39224 event pairs, 0 based on Foata normal form. 184/3892 useless extension candidates. Maximal degree in co-relation 50737. Up to 810 conditions per place. [2021-10-13 22:56:38,401 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 165 selfloop transitions, 474 changer transitions 8/691 dead transitions. [2021-10-13 22:56:38,401 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 876 places, 691 transitions, 41950 flow [2021-10-13 22:56:38,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-13 22:56:38,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-10-13 22:56:38,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2443 transitions. [2021-10-13 22:56:38,402 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8412534435261708 [2021-10-13 22:56:38,402 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2443 transitions. [2021-10-13 22:56:38,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2443 transitions. [2021-10-13 22:56:38,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:56:38,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2443 transitions. [2021-10-13 22:56:38,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 55.52272727272727) internal successors, (2443), 44 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:56:38,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 66.0) internal successors, (2970), 45 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:56:38,406 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 66.0) internal successors, (2970), 45 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:56:38,406 INFO L186 Difference]: Start difference. First operand has 836 places, 641 transitions, 33822 flow. Second operand 44 states and 2443 transitions. [2021-10-13 22:56:38,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 876 places, 691 transitions, 41950 flow [2021-10-13 22:56:43,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 842 places, 691 transitions, 40878 flow, removed 185 selfloop flow, removed 34 redundant places. [2021-10-13 22:56:43,572 INFO L242 Difference]: Finished difference. Result has 851 places, 648 transitions, 34787 flow [2021-10-13 22:56:43,572 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=32934, PETRI_DIFFERENCE_MINUEND_PLACES=799, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=467, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=34787, PETRI_PLACES=851, PETRI_TRANSITIONS=648} [2021-10-13 22:56:43,572 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 785 predicate places. [2021-10-13 22:56:43,572 INFO L470 AbstractCegarLoop]: Abstraction has has 851 places, 648 transitions, 34787 flow [2021-10-13 22:56:43,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.041666666666664) internal successors, (1297), 24 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:56:43,572 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:56:43,573 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:56:43,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-10-13 22:56:43,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-10-13 22:56:43,791 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:56:43,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:56:43,792 INFO L82 PathProgramCache]: Analyzing trace with hash 494156001, now seen corresponding path program 95 times [2021-10-13 22:56:43,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:56:43,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286845674] [2021-10-13 22:56:43,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:56:43,792 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:56:43,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:56:43,966 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:56:43,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:56:43,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286845674] [2021-10-13 22:56:43,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286845674] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:56:43,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137405913] [2021-10-13 22:56:43,967 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:56:43,967 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:56:43,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:56:43,967 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:56:43,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-10-13 22:56:47,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-10-13 22:56:47,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:56:47,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 22:56:47,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:56:47,409 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:56:47,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137405913] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:56:47,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:56:47,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-10-13 22:56:47,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101319285] [2021-10-13 22:56:47,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 22:56:47,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:56:47,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 22:56:47,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-10-13 22:56:47,411 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:56:47,411 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 851 places, 648 transitions, 34787 flow. Second operand has 24 states, 24 states have (on average 54.041666666666664) internal successors, (1297), 24 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:56:47,411 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:56:47,411 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:56:47,411 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:56:49,927 INFO L129 PetriNetUnfolder]: 569/4237 cut-off events. [2021-10-13 22:56:49,928 INFO L130 PetriNetUnfolder]: For 1206956/1207957 co-relation queries the response was YES. [2021-10-13 22:56:50,009 INFO L84 FinitePrefix]: Finished finitePrefix Result has 53472 conditions, 4237 events. 569/4237 cut-off events. For 1206956/1207957 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 39967 event pairs, 0 based on Foata normal form. 208/3993 useless extension candidates. Maximal degree in co-relation 53089. Up to 840 conditions per place. [2021-10-13 22:56:50,077 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 128 selfloop transitions, 530 changer transitions 8/710 dead transitions. [2021-10-13 22:56:50,077 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 895 places, 710 transitions, 44077 flow [2021-10-13 22:56:50,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-10-13 22:56:50,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-10-13 22:56:50,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2671 transitions. [2021-10-13 22:56:50,078 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8431186868686869 [2021-10-13 22:56:50,078 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2671 transitions. [2021-10-13 22:56:50,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2671 transitions. [2021-10-13 22:56:50,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:56:50,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2671 transitions. [2021-10-13 22:56:50,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 55.645833333333336) internal successors, (2671), 48 states have internal predecessors, (2671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:56:50,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 66.0) internal successors, (3234), 49 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:56:50,082 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 66.0) internal successors, (3234), 49 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:56:50,082 INFO L186 Difference]: Start difference. First operand has 851 places, 648 transitions, 34787 flow. Second operand 48 states and 2671 transitions. [2021-10-13 22:56:50,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 895 places, 710 transitions, 44077 flow [2021-10-13 22:56:55,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 856 places, 710 transitions, 42723 flow, removed 271 selfloop flow, removed 39 redundant places. [2021-10-13 22:56:55,630 INFO L242 Difference]: Finished difference. Result has 865 places, 659 transitions, 35903 flow [2021-10-13 22:56:55,631 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=33607, PETRI_DIFFERENCE_MINUEND_PLACES=809, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=519, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=35903, PETRI_PLACES=865, PETRI_TRANSITIONS=659} [2021-10-13 22:56:55,631 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 799 predicate places. [2021-10-13 22:56:55,631 INFO L470 AbstractCegarLoop]: Abstraction has has 865 places, 659 transitions, 35903 flow [2021-10-13 22:56:55,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.041666666666664) internal successors, (1297), 24 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:56:55,631 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:56:55,631 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:56:55,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-10-13 22:56:55,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-10-13 22:56:55,832 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:56:55,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:56:55,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1279695225, now seen corresponding path program 96 times [2021-10-13 22:56:55,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:56:55,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357510573] [2021-10-13 22:56:55,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:56:55,832 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:56:55,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:56:56,010 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:56:56,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:56:56,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357510573] [2021-10-13 22:56:56,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357510573] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:56:56,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780946182] [2021-10-13 22:56:56,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:56:56,011 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:56:56,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:56:56,011 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:56:56,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-10-13 22:56:59,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-10-13 22:56:59,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:56:59,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-13 22:56:59,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:56:59,453 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:56:59,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780946182] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:56:59,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:56:59,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-10-13 22:56:59,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012783027] [2021-10-13 22:56:59,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 22:56:59,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:56:59,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 22:56:59,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-10-13 22:56:59,455 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:56:59,455 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 865 places, 659 transitions, 35903 flow. Second operand has 25 states, 25 states have (on average 54.08) internal successors, (1352), 25 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:56:59,455 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:56:59,455 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:56:59,455 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:57:02,057 INFO L129 PetriNetUnfolder]: 564/4229 cut-off events. [2021-10-13 22:57:02,057 INFO L130 PetriNetUnfolder]: For 1257763/1258753 co-relation queries the response was YES. [2021-10-13 22:57:02,138 INFO L84 FinitePrefix]: Finished finitePrefix Result has 53996 conditions, 4229 events. 564/4229 cut-off events. For 1257763/1258753 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 39934 event pairs, 0 based on Foata normal form. 215/3994 useless extension candidates. Maximal degree in co-relation 53607. Up to 835 conditions per place. [2021-10-13 22:57:02,173 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 123 selfloop transitions, 535 changer transitions 11/713 dead transitions. [2021-10-13 22:57:02,173 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 909 places, 713 transitions, 45113 flow [2021-10-13 22:57:02,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-10-13 22:57:02,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-10-13 22:57:02,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2668 transitions. [2021-10-13 22:57:02,175 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8421717171717171 [2021-10-13 22:57:02,175 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2668 transitions. [2021-10-13 22:57:02,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2668 transitions. [2021-10-13 22:57:02,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:57:02,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2668 transitions. [2021-10-13 22:57:02,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 55.583333333333336) internal successors, (2668), 48 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:57:02,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 66.0) internal successors, (3234), 49 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:57:02,178 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 66.0) internal successors, (3234), 49 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:57:02,178 INFO L186 Difference]: Start difference. First operand has 865 places, 659 transitions, 35903 flow. Second operand 48 states and 2668 transitions. [2021-10-13 22:57:02,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 909 places, 713 transitions, 45113 flow [2021-10-13 22:57:08,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 868 places, 713 transitions, 43297 flow, removed 477 selfloop flow, removed 41 redundant places. [2021-10-13 22:57:08,163 INFO L242 Difference]: Finished difference. Result has 874 places, 662 transitions, 36087 flow [2021-10-13 22:57:08,163 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=34559, PETRI_DIFFERENCE_MINUEND_PLACES=821, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=532, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=36087, PETRI_PLACES=874, PETRI_TRANSITIONS=662} [2021-10-13 22:57:08,163 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 808 predicate places. [2021-10-13 22:57:08,163 INFO L470 AbstractCegarLoop]: Abstraction has has 874 places, 662 transitions, 36087 flow [2021-10-13 22:57:08,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.08) internal successors, (1352), 25 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:57:08,164 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:57:08,164 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:57:08,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-10-13 22:57:08,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:57:08,364 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:57:08,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:57:08,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1880389111, now seen corresponding path program 97 times [2021-10-13 22:57:08,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:57:08,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282788635] [2021-10-13 22:57:08,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:57:08,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:57:08,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:57:08,605 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:57:08,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:57:08,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282788635] [2021-10-13 22:57:08,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282788635] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:57:08,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750758229] [2021-10-13 22:57:08,606 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:57:08,606 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:57:08,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:57:08,606 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:57:08,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-10-13 22:57:11,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:57:11,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-13 22:57:11,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:57:12,345 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:57:12,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750758229] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:57:12,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:57:12,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-10-13 22:57:12,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80961995] [2021-10-13 22:57:12,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 22:57:12,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:57:12,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 22:57:12,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-10-13 22:57:12,347 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:57:12,347 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 874 places, 662 transitions, 36087 flow. Second operand has 25 states, 25 states have (on average 54.04) internal successors, (1351), 25 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:57:12,347 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:57:12,347 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:57:12,347 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:57:14,744 INFO L129 PetriNetUnfolder]: 564/4215 cut-off events. [2021-10-13 22:57:14,744 INFO L130 PetriNetUnfolder]: For 1238749/1239657 co-relation queries the response was YES. [2021-10-13 22:57:14,828 INFO L84 FinitePrefix]: Finished finitePrefix Result has 53775 conditions, 4215 events. 564/4215 cut-off events. For 1238749/1239657 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 39803 event pairs, 0 based on Foata normal form. 70/3831 useless extension candidates. Maximal degree in co-relation 53384. Up to 943 conditions per place. [2021-10-13 22:57:14,865 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 581 selfloop transitions, 67 changer transitions 8/700 dead transitions. [2021-10-13 22:57:14,865 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 899 places, 700 transitions, 42297 flow [2021-10-13 22:57:14,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 22:57:14,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-10-13 22:57:14,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1606 transitions. [2021-10-13 22:57:14,866 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8390804597701149 [2021-10-13 22:57:14,866 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1606 transitions. [2021-10-13 22:57:14,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1606 transitions. [2021-10-13 22:57:14,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:57:14,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1606 transitions. [2021-10-13 22:57:14,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 55.37931034482759) internal successors, (1606), 29 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:57:14,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:57:14,868 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:57:14,868 INFO L186 Difference]: Start difference. First operand has 874 places, 662 transitions, 36087 flow. Second operand 29 states and 1606 transitions. [2021-10-13 22:57:14,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 899 places, 700 transitions, 42297 flow [2021-10-13 22:57:20,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 852 places, 700 transitions, 40848 flow, removed 179 selfloop flow, removed 47 redundant places. [2021-10-13 22:57:20,740 INFO L242 Difference]: Finished difference. Result has 857 places, 664 transitions, 35124 flow [2021-10-13 22:57:20,740 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=34668, PETRI_DIFFERENCE_MINUEND_PLACES=824, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=35124, PETRI_PLACES=857, PETRI_TRANSITIONS=664} [2021-10-13 22:57:20,740 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 791 predicate places. [2021-10-13 22:57:20,740 INFO L470 AbstractCegarLoop]: Abstraction has has 857 places, 664 transitions, 35124 flow [2021-10-13 22:57:20,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.04) internal successors, (1351), 25 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:57:20,741 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:57:20,741 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:57:20,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-10-13 22:57:20,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:57:20,941 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:57:20,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:57:20,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1729375531, now seen corresponding path program 98 times [2021-10-13 22:57:20,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:57:20,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137524634] [2021-10-13 22:57:20,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:57:20,942 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:57:20,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:57:21,174 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:57:21,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:57:21,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137524634] [2021-10-13 22:57:21,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137524634] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:57:21,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440569370] [2021-10-13 22:57:21,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:57:21,174 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:57:21,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:57:21,176 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:57:21,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-10-13 22:57:24,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:57:24,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:57:24,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-13 22:57:24,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:57:24,989 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:57:24,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440569370] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:57:24,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:57:24,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-10-13 22:57:24,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298017909] [2021-10-13 22:57:24,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 22:57:24,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:57:24,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 22:57:24,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-10-13 22:57:24,990 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:57:24,991 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 857 places, 664 transitions, 35124 flow. Second operand has 25 states, 25 states have (on average 54.04) internal successors, (1351), 25 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:57:24,991 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:57:24,991 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:57:24,991 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:57:27,179 INFO L129 PetriNetUnfolder]: 566/4254 cut-off events. [2021-10-13 22:57:27,179 INFO L130 PetriNetUnfolder]: For 1290820/1291635 co-relation queries the response was YES. [2021-10-13 22:57:27,259 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54115 conditions, 4254 events. 566/4254 cut-off events. For 1290820/1291635 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 40114 event pairs, 0 based on Foata normal form. 89/3886 useless extension candidates. Maximal degree in co-relation 53724. Up to 835 conditions per place. [2021-10-13 22:57:27,293 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 476 selfloop transitions, 175 changer transitions 8/703 dead transitions. [2021-10-13 22:57:27,293 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 885 places, 703 transitions, 41738 flow [2021-10-13 22:57:27,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 22:57:27,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-10-13 22:57:27,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1771 transitions. [2021-10-13 22:57:27,294 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8385416666666666 [2021-10-13 22:57:27,294 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1771 transitions. [2021-10-13 22:57:27,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1771 transitions. [2021-10-13 22:57:27,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:57:27,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1771 transitions. [2021-10-13 22:57:27,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.34375) internal successors, (1771), 32 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:57:27,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 66.0) internal successors, (2178), 33 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:57:27,296 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 66.0) internal successors, (2178), 33 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:57:27,297 INFO L186 Difference]: Start difference. First operand has 857 places, 664 transitions, 35124 flow. Second operand 32 states and 1771 transitions. [2021-10-13 22:57:27,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 885 places, 703 transitions, 41738 flow [2021-10-13 22:57:32,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 860 places, 703 transitions, 41252 flow, removed 184 selfloop flow, removed 25 redundant places. [2021-10-13 22:57:32,855 INFO L242 Difference]: Finished difference. Result has 865 places, 666 transitions, 35492 flow [2021-10-13 22:57:32,855 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=34814, PETRI_DIFFERENCE_MINUEND_PLACES=829, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=35492, PETRI_PLACES=865, PETRI_TRANSITIONS=666} [2021-10-13 22:57:32,855 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 799 predicate places. [2021-10-13 22:57:32,855 INFO L470 AbstractCegarLoop]: Abstraction has has 865 places, 666 transitions, 35492 flow [2021-10-13 22:57:32,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.04) internal successors, (1351), 25 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:57:32,855 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:57:32,856 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:57:32,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-10-13 22:57:33,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-10-13 22:57:33,056 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:57:33,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:57:33,056 INFO L82 PathProgramCache]: Analyzing trace with hash -411853903, now seen corresponding path program 99 times [2021-10-13 22:57:33,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:57:33,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780083482] [2021-10-13 22:57:33,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:57:33,056 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:57:33,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:57:33,295 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:57:33,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:57:33,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780083482] [2021-10-13 22:57:33,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780083482] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:57:33,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940313665] [2021-10-13 22:57:33,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:57:33,295 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:57:33,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:57:33,296 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:57:33,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-10-13 22:57:36,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-10-13 22:57:36,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:57:36,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-13 22:57:36,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:57:37,194 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:57:37,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940313665] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:57:37,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:57:37,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-10-13 22:57:37,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412360698] [2021-10-13 22:57:37,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-13 22:57:37,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:57:37,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-13 22:57:37,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-10-13 22:57:37,195 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:57:37,195 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 865 places, 666 transitions, 35492 flow. Second operand has 26 states, 26 states have (on average 54.07692307692308) internal successors, (1406), 26 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:57:37,195 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:57:37,195 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:57:37,196 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:57:39,385 INFO L129 PetriNetUnfolder]: 570/4290 cut-off events. [2021-10-13 22:57:39,385 INFO L130 PetriNetUnfolder]: For 1288068/1288878 co-relation queries the response was YES. [2021-10-13 22:57:39,472 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54552 conditions, 4290 events. 570/4290 cut-off events. For 1288068/1288878 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 40482 event pairs, 0 based on Foata normal form. 104/3933 useless extension candidates. Maximal degree in co-relation 54159. Up to 843 conditions per place. [2021-10-13 22:57:39,506 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 425 selfloop transitions, 231 changer transitions 8/708 dead transitions. [2021-10-13 22:57:39,506 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 896 places, 708 transitions, 42397 flow [2021-10-13 22:57:39,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-13 22:57:39,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-10-13 22:57:39,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1938 transitions. [2021-10-13 22:57:39,507 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8389610389610389 [2021-10-13 22:57:39,507 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1938 transitions. [2021-10-13 22:57:39,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1938 transitions. [2021-10-13 22:57:39,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:57:39,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1938 transitions. [2021-10-13 22:57:39,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 55.371428571428574) internal successors, (1938), 35 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:57:39,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 66.0) internal successors, (2376), 36 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:57:39,510 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 66.0) internal successors, (2376), 36 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:57:39,510 INFO L186 Difference]: Start difference. First operand has 865 places, 666 transitions, 35492 flow. Second operand 35 states and 1938 transitions. [2021-10-13 22:57:39,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 896 places, 708 transitions, 42397 flow [2021-10-13 22:57:45,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 867 places, 708 transitions, 41739 flow, removed 162 selfloop flow, removed 29 redundant places. [2021-10-13 22:57:45,479 INFO L242 Difference]: Finished difference. Result has 872 places, 670 transitions, 35949 flow [2021-10-13 22:57:45,479 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=34978, PETRI_DIFFERENCE_MINUEND_PLACES=833, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=35949, PETRI_PLACES=872, PETRI_TRANSITIONS=670} [2021-10-13 22:57:45,479 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 806 predicate places. [2021-10-13 22:57:45,479 INFO L470 AbstractCegarLoop]: Abstraction has has 872 places, 670 transitions, 35949 flow [2021-10-13 22:57:45,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 54.07692307692308) internal successors, (1406), 26 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:57:45,480 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:57:45,480 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:57:45,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-10-13 22:57:45,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:57:45,680 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:57:45,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:57:45,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1499328705, now seen corresponding path program 100 times [2021-10-13 22:57:45,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:57:45,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719020132] [2021-10-13 22:57:45,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:57:45,681 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:57:45,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:57:45,903 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:57:45,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:57:45,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719020132] [2021-10-13 22:57:45,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719020132] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:57:45,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870291632] [2021-10-13 22:57:45,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:57:45,903 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:57:45,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:57:45,911 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:57:45,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-10-13 22:57:49,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:57:49,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:57:49,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-13 22:57:49,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:57:49,657 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:57:49,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870291632] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:57:49,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:57:49,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-10-13 22:57:49,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753743884] [2021-10-13 22:57:49,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 22:57:49,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:57:49,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 22:57:49,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-10-13 22:57:49,659 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:57:49,659 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 872 places, 670 transitions, 35949 flow. Second operand has 25 states, 25 states have (on average 54.04) internal successors, (1351), 25 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:57:49,659 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:57:49,659 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:57:49,659 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:57:51,852 INFO L129 PetriNetUnfolder]: 572/4308 cut-off events. [2021-10-13 22:57:51,852 INFO L130 PetriNetUnfolder]: For 1291266/1292076 co-relation queries the response was YES. [2021-10-13 22:57:51,933 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54867 conditions, 4308 events. 572/4308 cut-off events. For 1291266/1292076 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 40680 event pairs, 0 based on Foata normal form. 139/3984 useless extension candidates. Maximal degree in co-relation 54472. Up to 847 conditions per place. [2021-10-13 22:57:51,965 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 309 selfloop transitions, 352 changer transitions 8/713 dead transitions. [2021-10-13 22:57:51,965 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 904 places, 713 transitions, 43145 flow [2021-10-13 22:57:51,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-13 22:57:51,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-10-13 22:57:51,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1995 transitions. [2021-10-13 22:57:51,966 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8396464646464646 [2021-10-13 22:57:51,966 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1995 transitions. [2021-10-13 22:57:51,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1995 transitions. [2021-10-13 22:57:51,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:57:51,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1995 transitions. [2021-10-13 22:57:51,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 55.416666666666664) internal successors, (1995), 36 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:57:51,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:57:51,969 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:57:51,969 INFO L186 Difference]: Start difference. First operand has 872 places, 670 transitions, 35949 flow. Second operand 36 states and 1995 transitions. [2021-10-13 22:57:51,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 904 places, 713 transitions, 43145 flow [2021-10-13 22:57:58,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 873 places, 713 transitions, 42392 flow, removed 172 selfloop flow, removed 31 redundant places. [2021-10-13 22:57:58,030 INFO L242 Difference]: Finished difference. Result has 878 places, 672 transitions, 36400 flow [2021-10-13 22:57:58,030 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=35352, PETRI_DIFFERENCE_MINUEND_PLACES=838, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=350, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=36400, PETRI_PLACES=878, PETRI_TRANSITIONS=672} [2021-10-13 22:57:58,030 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 812 predicate places. [2021-10-13 22:57:58,030 INFO L470 AbstractCegarLoop]: Abstraction has has 878 places, 672 transitions, 36400 flow [2021-10-13 22:57:58,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.04) internal successors, (1351), 25 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:57:58,030 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:57:58,030 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:57:58,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2021-10-13 22:57:58,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:57:58,231 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:57:58,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:57:58,231 INFO L82 PathProgramCache]: Analyzing trace with hash 337851443, now seen corresponding path program 101 times [2021-10-13 22:57:58,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:57:58,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100296750] [2021-10-13 22:57:58,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:57:58,231 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:57:58,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:57:58,446 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:57:58,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:57:58,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100296750] [2021-10-13 22:57:58,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100296750] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:57:58,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219920445] [2021-10-13 22:57:58,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:57:58,447 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:57:58,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:57:58,448 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:57:58,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-10-13 22:58:01,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-10-13 22:58:01,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:58:01,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-13 22:58:01,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:58:02,310 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:58:02,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219920445] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:58:02,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:58:02,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-10-13 22:58:02,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41109585] [2021-10-13 22:58:02,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-13 22:58:02,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:58:02,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-13 22:58:02,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-10-13 22:58:02,311 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:58:02,312 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 878 places, 672 transitions, 36400 flow. Second operand has 26 states, 26 states have (on average 54.07692307692308) internal successors, (1406), 26 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:58:02,312 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:58:02,312 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:58:02,312 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:58:04,659 INFO L129 PetriNetUnfolder]: 576/4337 cut-off events. [2021-10-13 22:58:04,659 INFO L130 PetriNetUnfolder]: For 1305670/1306534 co-relation queries the response was YES. [2021-10-13 22:58:04,743 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55500 conditions, 4337 events. 576/4337 cut-off events. For 1305670/1306534 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 41006 event pairs, 0 based on Foata normal form. 153/4024 useless extension candidates. Maximal degree in co-relation 55103. Up to 855 conditions per place. [2021-10-13 22:58:04,778 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 272 selfloop transitions, 394 changer transitions 8/718 dead transitions. [2021-10-13 22:58:04,778 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 913 places, 718 transitions, 43901 flow [2021-10-13 22:58:04,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-13 22:58:04,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-10-13 22:58:04,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2162 transitions. [2021-10-13 22:58:04,779 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.83993783993784 [2021-10-13 22:58:04,779 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2162 transitions. [2021-10-13 22:58:04,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2162 transitions. [2021-10-13 22:58:04,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:58:04,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2162 transitions. [2021-10-13 22:58:04,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 55.43589743589744) internal successors, (2162), 39 states have internal predecessors, (2162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:58:04,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 66.0) internal successors, (2640), 40 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:58:04,782 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 66.0) internal successors, (2640), 40 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:58:04,782 INFO L186 Difference]: Start difference. First operand has 878 places, 672 transitions, 36400 flow. Second operand 39 states and 2162 transitions. [2021-10-13 22:58:04,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 913 places, 718 transitions, 43901 flow [2021-10-13 22:58:11,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 881 places, 718 transitions, 42892 flow, removed 172 selfloop flow, removed 32 redundant places. [2021-10-13 22:58:11,200 INFO L242 Difference]: Finished difference. Result has 888 places, 676 transitions, 36886 flow [2021-10-13 22:58:11,200 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=35551, PETRI_DIFFERENCE_MINUEND_PLACES=843, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=390, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=36886, PETRI_PLACES=888, PETRI_TRANSITIONS=676} [2021-10-13 22:58:11,201 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 822 predicate places. [2021-10-13 22:58:11,201 INFO L470 AbstractCegarLoop]: Abstraction has has 888 places, 676 transitions, 36886 flow [2021-10-13 22:58:11,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 54.07692307692308) internal successors, (1406), 26 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:58:11,201 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:58:11,201 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:58:11,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2021-10-13 22:58:11,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-10-13 22:58:11,401 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:58:11,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:58:11,402 INFO L82 PathProgramCache]: Analyzing trace with hash 963694947, now seen corresponding path program 102 times [2021-10-13 22:58:11,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:58:11,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882426064] [2021-10-13 22:58:11,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:58:11,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:58:11,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:58:11,606 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:58:11,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:58:11,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882426064] [2021-10-13 22:58:11,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882426064] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:58:11,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344980482] [2021-10-13 22:58:11,607 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:58:11,607 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:58:11,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:58:11,607 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:58:11,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-10-13 22:58:15,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-10-13 22:58:15,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:58:15,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-13 22:58:15,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:58:15,426 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:58:15,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344980482] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:58:15,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:58:15,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-10-13 22:58:15,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464225227] [2021-10-13 22:58:15,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 22:58:15,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:58:15,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 22:58:15,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-10-13 22:58:15,428 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:58:15,428 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 888 places, 676 transitions, 36886 flow. Second operand has 25 states, 25 states have (on average 54.04) internal successors, (1351), 25 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:58:15,428 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:58:15,428 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:58:15,428 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:58:17,820 INFO L129 PetriNetUnfolder]: 584/4409 cut-off events. [2021-10-13 22:58:17,820 INFO L130 PetriNetUnfolder]: For 1330528/1331392 co-relation queries the response was YES. [2021-10-13 22:58:17,909 INFO L84 FinitePrefix]: Finished finitePrefix Result has 56591 conditions, 4409 events. 584/4409 cut-off events. For 1330528/1331392 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 41851 event pairs, 0 based on Foata normal form. 156/4091 useless extension candidates. Maximal degree in co-relation 56190. Up to 871 conditions per place. [2021-10-13 22:58:18,055 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 247 selfloop transitions, 427 changer transitions 8/726 dead transitions. [2021-10-13 22:58:18,055 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 922 places, 726 transitions, 44883 flow [2021-10-13 22:58:18,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-13 22:58:18,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-10-13 22:58:18,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2107 transitions. [2021-10-13 22:58:18,057 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8401116427432217 [2021-10-13 22:58:18,057 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2107 transitions. [2021-10-13 22:58:18,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2107 transitions. [2021-10-13 22:58:18,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:58:18,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2107 transitions. [2021-10-13 22:58:18,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 55.44736842105263) internal successors, (2107), 38 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:58:18,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 66.0) internal successors, (2574), 39 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:58:18,059 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 66.0) internal successors, (2574), 39 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:58:18,059 INFO L186 Difference]: Start difference. First operand has 888 places, 676 transitions, 36886 flow. Second operand 38 states and 2107 transitions. [2021-10-13 22:58:18,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 922 places, 726 transitions, 44883 flow [2021-10-13 22:58:24,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 889 places, 726 transitions, 43851 flow, removed 178 selfloop flow, removed 33 redundant places. [2021-10-13 22:58:24,820 INFO L242 Difference]: Finished difference. Result has 896 places, 684 transitions, 37778 flow [2021-10-13 22:58:24,820 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=36022, PETRI_DIFFERENCE_MINUEND_PLACES=852, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=419, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=37778, PETRI_PLACES=896, PETRI_TRANSITIONS=684} [2021-10-13 22:58:24,820 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 830 predicate places. [2021-10-13 22:58:24,820 INFO L470 AbstractCegarLoop]: Abstraction has has 896 places, 684 transitions, 37778 flow [2021-10-13 22:58:24,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.04) internal successors, (1351), 25 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:58:24,820 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:58:24,820 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:58:24,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-10-13 22:58:25,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:58:25,021 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:58:25,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:58:25,021 INFO L82 PathProgramCache]: Analyzing trace with hash 481646941, now seen corresponding path program 103 times [2021-10-13 22:58:25,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:58:25,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383987650] [2021-10-13 22:58:25,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:58:25,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:58:25,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:58:25,223 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:58:25,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:58:25,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383987650] [2021-10-13 22:58:25,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383987650] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:58:25,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691221405] [2021-10-13 22:58:25,224 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:58:25,224 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:58:25,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:58:25,225 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:58:25,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-10-13 22:58:28,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:58:28,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-13 22:58:28,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:58:29,052 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 4 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:58:29,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691221405] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:58:29,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:58:29,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-10-13 22:58:29,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948376220] [2021-10-13 22:58:29,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-13 22:58:29,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:58:29,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-13 22:58:29,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-10-13 22:58:29,054 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:58:29,054 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 896 places, 684 transitions, 37778 flow. Second operand has 26 states, 26 states have (on average 54.07692307692308) internal successors, (1406), 26 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:58:29,054 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:58:29,054 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:58:29,054 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:58:31,588 INFO L129 PetriNetUnfolder]: 592/4481 cut-off events. [2021-10-13 22:58:31,589 INFO L130 PetriNetUnfolder]: For 1351902/1352766 co-relation queries the response was YES. [2021-10-13 22:58:31,675 INFO L84 FinitePrefix]: Finished finitePrefix Result has 57695 conditions, 4481 events. 592/4481 cut-off events. For 1351902/1352766 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 42765 event pairs, 0 based on Foata normal form. 188/4187 useless extension candidates. Maximal degree in co-relation 57290. Up to 887 conditions per place. [2021-10-13 22:58:31,708 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 185 selfloop transitions, 501 changer transitions 8/738 dead transitions. [2021-10-13 22:58:31,708 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 935 places, 738 transitions, 46207 flow [2021-10-13 22:58:31,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-13 22:58:31,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-10-13 22:58:31,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2386 transitions. [2021-10-13 22:58:31,710 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8407329105003524 [2021-10-13 22:58:31,710 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2386 transitions. [2021-10-13 22:58:31,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2386 transitions. [2021-10-13 22:58:31,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:58:31,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2386 transitions. [2021-10-13 22:58:31,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 55.48837209302326) internal successors, (2386), 43 states have internal predecessors, (2386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:58:31,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 66.0) internal successors, (2904), 44 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:58:31,713 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 66.0) internal successors, (2904), 44 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:58:31,713 INFO L186 Difference]: Start difference. First operand has 896 places, 684 transitions, 37778 flow. Second operand 43 states and 2386 transitions. [2021-10-13 22:58:31,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 935 places, 738 transitions, 46207 flow [2021-10-13 22:58:38,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 902 places, 738 transitions, 45089 flow, removed 182 selfloop flow, removed 33 redundant places. [2021-10-13 22:58:38,593 INFO L242 Difference]: Finished difference. Result has 911 places, 692 transitions, 38807 flow [2021-10-13 22:58:38,594 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=36836, PETRI_DIFFERENCE_MINUEND_PLACES=860, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=493, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=38807, PETRI_PLACES=911, PETRI_TRANSITIONS=692} [2021-10-13 22:58:38,594 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 845 predicate places. [2021-10-13 22:58:38,594 INFO L470 AbstractCegarLoop]: Abstraction has has 911 places, 692 transitions, 38807 flow [2021-10-13 22:58:38,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 54.07692307692308) internal successors, (1406), 26 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:58:38,594 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:58:38,594 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:58:38,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-10-13 22:58:38,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-10-13 22:58:38,795 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:58:38,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:58:38,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1239862995, now seen corresponding path program 104 times [2021-10-13 22:58:38,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:58:38,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422154878] [2021-10-13 22:58:38,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:58:38,795 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:58:38,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:58:39,001 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:58:39,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:58:39,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422154878] [2021-10-13 22:58:39,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422154878] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:58:39,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81316733] [2021-10-13 22:58:39,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:58:39,002 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:58:39,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:58:39,002 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:58:39,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-10-13 22:58:42,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:58:42,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:58:42,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-13 22:58:42,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:58:42,862 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:58:42,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81316733] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:58:42,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:58:42,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-10-13 22:58:42,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038931122] [2021-10-13 22:58:42,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 22:58:42,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:58:42,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 22:58:42,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-10-13 22:58:42,863 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:58:42,864 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 911 places, 692 transitions, 38807 flow. Second operand has 25 states, 25 states have (on average 54.04) internal successors, (1351), 25 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:58:42,864 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:58:42,864 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:58:42,864 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:58:45,365 INFO L129 PetriNetUnfolder]: 596/4510 cut-off events. [2021-10-13 22:58:45,365 INFO L130 PetriNetUnfolder]: For 1363463/1364319 co-relation queries the response was YES. [2021-10-13 22:58:45,558 INFO L84 FinitePrefix]: Finished finitePrefix Result has 58398 conditions, 4510 events. 596/4510 cut-off events. For 1363463/1364319 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 42970 event pairs, 0 based on Foata normal form. 196/4220 useless extension candidates. Maximal degree in co-relation 57987. Up to 895 conditions per place. [2021-10-13 22:58:45,591 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 147 selfloop transitions, 549 changer transitions 8/748 dead transitions. [2021-10-13 22:58:45,591 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 951 places, 748 transitions, 47433 flow [2021-10-13 22:58:45,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-13 22:58:45,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-10-13 22:58:45,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2443 transitions. [2021-10-13 22:58:45,593 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8412534435261708 [2021-10-13 22:58:45,593 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2443 transitions. [2021-10-13 22:58:45,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2443 transitions. [2021-10-13 22:58:45,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:58:45,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2443 transitions. [2021-10-13 22:58:45,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 55.52272727272727) internal successors, (2443), 44 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:58:45,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 66.0) internal successors, (2970), 45 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:58:45,596 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 66.0) internal successors, (2970), 45 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:58:45,596 INFO L186 Difference]: Start difference. First operand has 911 places, 692 transitions, 38807 flow. Second operand 44 states and 2443 transitions. [2021-10-13 22:58:45,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 951 places, 748 transitions, 47433 flow [2021-10-13 22:58:52,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 915 places, 748 transitions, 46257 flow, removed 192 selfloop flow, removed 36 redundant places. [2021-10-13 22:58:52,545 INFO L242 Difference]: Finished difference. Result has 923 places, 697 transitions, 39545 flow [2021-10-13 22:58:52,545 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=37819, PETRI_DIFFERENCE_MINUEND_PLACES=872, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=544, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=39545, PETRI_PLACES=923, PETRI_TRANSITIONS=697} [2021-10-13 22:58:52,545 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 857 predicate places. [2021-10-13 22:58:52,546 INFO L470 AbstractCegarLoop]: Abstraction has has 923 places, 697 transitions, 39545 flow [2021-10-13 22:58:52,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.04) internal successors, (1351), 25 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:58:52,546 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:58:52,546 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:58:52,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-10-13 22:58:52,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:58:52,746 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:58:52,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:58:52,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1591393883, now seen corresponding path program 105 times [2021-10-13 22:58:52,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:58:52,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220037454] [2021-10-13 22:58:52,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:58:52,747 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:58:52,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:58:52,929 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:58:52,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:58:52,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220037454] [2021-10-13 22:58:52,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220037454] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:58:52,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117939827] [2021-10-13 22:58:52,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:58:52,930 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:58:52,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:58:52,930 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:58:52,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-10-13 22:58:56,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-10-13 22:58:56,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:58:56,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 22:58:56,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:58:56,798 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:58:56,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117939827] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:58:56,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:58:56,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-10-13 22:58:56,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986589465] [2021-10-13 22:58:56,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 22:58:56,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:58:56,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 22:58:56,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-10-13 22:58:56,799 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:58:56,800 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 923 places, 697 transitions, 39545 flow. Second operand has 25 states, 25 states have (on average 54.04) internal successors, (1351), 25 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:58:56,800 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:58:56,800 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:58:56,800 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:58:59,523 INFO L129 PetriNetUnfolder]: 611/4578 cut-off events. [2021-10-13 22:58:59,523 INFO L130 PetriNetUnfolder]: For 1404327/1405239 co-relation queries the response was YES. [2021-10-13 22:58:59,614 INFO L84 FinitePrefix]: Finished finitePrefix Result has 60225 conditions, 4578 events. 611/4578 cut-off events. For 1404327/1405239 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 43566 event pairs, 0 based on Foata normal form. 206/4297 useless extension candidates. Maximal degree in co-relation 59809. Up to 916 conditions per place. [2021-10-13 22:58:59,649 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 121 selfloop transitions, 589 changer transitions 8/762 dead transitions. [2021-10-13 22:58:59,649 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 967 places, 762 transitions, 49304 flow [2021-10-13 22:58:59,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-10-13 22:58:59,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-10-13 22:58:59,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2671 transitions. [2021-10-13 22:58:59,651 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8431186868686869 [2021-10-13 22:58:59,651 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2671 transitions. [2021-10-13 22:58:59,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2671 transitions. [2021-10-13 22:58:59,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:58:59,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2671 transitions. [2021-10-13 22:58:59,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 55.645833333333336) internal successors, (2671), 48 states have internal predecessors, (2671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:58:59,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 66.0) internal successors, (3234), 49 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:58:59,686 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 66.0) internal successors, (3234), 49 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:58:59,686 INFO L186 Difference]: Start difference. First operand has 923 places, 697 transitions, 39545 flow. Second operand 48 states and 2671 transitions. [2021-10-13 22:58:59,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 967 places, 762 transitions, 49304 flow [2021-10-13 22:59:05,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 929 places, 762 transitions, 47969 flow, removed 215 selfloop flow, removed 38 redundant places. [2021-10-13 22:59:05,973 INFO L242 Difference]: Finished difference. Result has 936 places, 703 transitions, 40529 flow [2021-10-13 22:59:05,974 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=38448, PETRI_DIFFERENCE_MINUEND_PLACES=882, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=583, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=40529, PETRI_PLACES=936, PETRI_TRANSITIONS=703} [2021-10-13 22:59:05,974 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 870 predicate places. [2021-10-13 22:59:05,974 INFO L470 AbstractCegarLoop]: Abstraction has has 936 places, 703 transitions, 40529 flow [2021-10-13 22:59:05,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.04) internal successors, (1351), 25 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:59:05,974 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:59:05,974 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:59:06,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-10-13 22:59:06,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-10-13 22:59:06,183 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:59:06,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:59:06,184 INFO L82 PathProgramCache]: Analyzing trace with hash -370207007, now seen corresponding path program 106 times [2021-10-13 22:59:06,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:59:06,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489662138] [2021-10-13 22:59:06,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:59:06,184 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:59:06,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:59:06,414 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:59:06,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:59:06,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489662138] [2021-10-13 22:59:06,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489662138] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:59:06,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435274261] [2021-10-13 22:59:06,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:59:06,415 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:59:06,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:59:06,416 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:59:06,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-10-13 22:59:09,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:59:09,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:59:09,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-13 22:59:09,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:59:10,228 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:59:10,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435274261] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:59:10,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:59:10,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-10-13 22:59:10,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112356476] [2021-10-13 22:59:10,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-13 22:59:10,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:59:10,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-13 22:59:10,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-10-13 22:59:10,230 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:59:10,230 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 936 places, 703 transitions, 40529 flow. Second operand has 26 states, 26 states have (on average 54.07692307692308) internal successors, (1406), 26 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:59:10,230 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:59:10,230 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:59:10,230 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:59:13,112 INFO L129 PetriNetUnfolder]: 606/4584 cut-off events. [2021-10-13 22:59:13,112 INFO L130 PetriNetUnfolder]: For 1453564/1454513 co-relation queries the response was YES. [2021-10-13 22:59:13,207 INFO L84 FinitePrefix]: Finished finitePrefix Result has 60691 conditions, 4584 events. 606/4584 cut-off events. For 1453564/1454513 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 43726 event pairs, 0 based on Foata normal form. 217/4312 useless extension candidates. Maximal degree in co-relation 60271. Up to 913 conditions per place. [2021-10-13 22:59:13,243 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 115 selfloop transitions, 595 changer transitions 11/765 dead transitions. [2021-10-13 22:59:13,243 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 982 places, 765 transitions, 50448 flow [2021-10-13 22:59:13,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-10-13 22:59:13,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-10-13 22:59:13,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2779 transitions. [2021-10-13 22:59:13,245 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8421212121212122 [2021-10-13 22:59:13,245 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2779 transitions. [2021-10-13 22:59:13,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2779 transitions. [2021-10-13 22:59:13,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:59:13,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2779 transitions. [2021-10-13 22:59:13,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 55.58) internal successors, (2779), 50 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:59:13,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 66.0) internal successors, (3366), 51 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:59:13,248 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 66.0) internal successors, (3366), 51 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:59:13,248 INFO L186 Difference]: Start difference. First operand has 936 places, 703 transitions, 40529 flow. Second operand 50 states and 2779 transitions. [2021-10-13 22:59:13,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 982 places, 765 transitions, 50448 flow [2021-10-13 22:59:21,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 936 places, 765 transitions, 48472 flow, removed 437 selfloop flow, removed 46 redundant places. [2021-10-13 22:59:21,238 INFO L242 Difference]: Finished difference. Result has 942 places, 706 transitions, 40647 flow [2021-10-13 22:59:21,238 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=38983, PETRI_DIFFERENCE_MINUEND_PLACES=887, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=592, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=40647, PETRI_PLACES=942, PETRI_TRANSITIONS=706} [2021-10-13 22:59:21,239 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 876 predicate places. [2021-10-13 22:59:21,239 INFO L470 AbstractCegarLoop]: Abstraction has has 942 places, 706 transitions, 40647 flow [2021-10-13 22:59:21,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 54.07692307692308) internal successors, (1406), 26 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:59:21,239 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:59:21,239 INFO L254 CegarLoopForPetriNet]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:59:21,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-10-13 22:59:21,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-10-13 22:59:21,439 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:59:21,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:59:21,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1327059802, now seen corresponding path program 107 times [2021-10-13 22:59:21,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:59:21,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109496194] [2021-10-13 22:59:21,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:59:21,440 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:59:21,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:59:21,689 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:59:21,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:59:21,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109496194] [2021-10-13 22:59:21,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109496194] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:59:21,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119741278] [2021-10-13 22:59:21,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:59:21,690 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:59:21,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:59:21,691 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:59:21,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-10-13 22:59:25,328 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-10-13 22:59:25,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:59:25,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 22:59:25,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:59:25,775 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:59:25,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119741278] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:59:25,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:59:25,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-10-13 22:59:25,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120089013] [2021-10-13 22:59:25,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-13 22:59:25,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:59:25,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-13 22:59:25,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2021-10-13 22:59:25,779 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:59:25,779 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 942 places, 706 transitions, 40647 flow. Second operand has 27 states, 27 states have (on average 54.074074074074076) internal successors, (1460), 27 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:59:25,779 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:59:25,779 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:59:25,779 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:59:28,157 INFO L129 PetriNetUnfolder]: 606/4591 cut-off events. [2021-10-13 22:59:28,158 INFO L130 PetriNetUnfolder]: For 1458051/1458873 co-relation queries the response was YES. [2021-10-13 22:59:28,252 INFO L84 FinitePrefix]: Finished finitePrefix Result has 60701 conditions, 4591 events. 606/4591 cut-off events. For 1458051/1458873 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 43806 event pairs, 0 based on Foata normal form. 74/4171 useless extension candidates. Maximal degree in co-relation 60279. Up to 1084 conditions per place. [2021-10-13 22:59:28,287 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 654 selfloop transitions, 35 changer transitions 8/741 dead transitions. [2021-10-13 22:59:28,287 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 967 places, 741 transitions, 47121 flow [2021-10-13 22:59:28,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 22:59:28,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-10-13 22:59:28,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1605 transitions. [2021-10-13 22:59:28,288 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8385579937304075 [2021-10-13 22:59:28,288 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1605 transitions. [2021-10-13 22:59:28,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1605 transitions. [2021-10-13 22:59:28,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:59:28,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1605 transitions. [2021-10-13 22:59:28,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 55.3448275862069) internal successors, (1605), 29 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:59:28,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:59:28,290 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:59:28,290 INFO L186 Difference]: Start difference. First operand has 942 places, 706 transitions, 40647 flow. Second operand 29 states and 1605 transitions. [2021-10-13 22:59:28,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 967 places, 741 transitions, 47121 flow [2021-10-13 22:59:35,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 925 places, 741 transitions, 45805 flow, removed 176 selfloop flow, removed 42 redundant places. [2021-10-13 22:59:35,706 INFO L242 Difference]: Finished difference. Result has 930 places, 708 transitions, 39763 flow [2021-10-13 22:59:35,706 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=39363, PETRI_DIFFERENCE_MINUEND_PLACES=897, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=671, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=39763, PETRI_PLACES=930, PETRI_TRANSITIONS=708} [2021-10-13 22:59:35,706 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 864 predicate places. [2021-10-13 22:59:35,706 INFO L470 AbstractCegarLoop]: Abstraction has has 930 places, 708 transitions, 39763 flow [2021-10-13 22:59:35,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 54.074074074074076) internal successors, (1460), 27 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:59:35,707 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:59:35,707 INFO L254 CegarLoopForPetriNet]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:59:35,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-10-13 22:59:35,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-10-13 22:59:35,919 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:59:35,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:59:35,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1662654672, now seen corresponding path program 108 times [2021-10-13 22:59:35,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:59:35,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951222606] [2021-10-13 22:59:35,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:59:35,920 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:59:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:59:36,164 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:59:36,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:59:36,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951222606] [2021-10-13 22:59:36,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951222606] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:59:36,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677105863] [2021-10-13 22:59:36,178 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:59:36,178 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:59:36,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:59:36,179 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:59:36,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-10-13 22:59:39,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-10-13 22:59:39,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:59:39,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 22:59:39,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:59:40,188 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:59:40,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677105863] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:59:40,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:59:40,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-10-13 22:59:40,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092646073] [2021-10-13 22:59:40,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-13 22:59:40,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:59:40,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-13 22:59:40,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-10-13 22:59:40,189 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:59:40,190 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 930 places, 708 transitions, 39763 flow. Second operand has 27 states, 27 states have (on average 54.074074074074076) internal successors, (1460), 27 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:59:40,190 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:59:40,190 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:59:40,190 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:59:42,736 INFO L129 PetriNetUnfolder]: 608/4609 cut-off events. [2021-10-13 22:59:42,736 INFO L130 PetriNetUnfolder]: For 1518875/1519738 co-relation queries the response was YES. [2021-10-13 22:59:42,828 INFO L84 FinitePrefix]: Finished finitePrefix Result has 61163 conditions, 4609 events. 608/4609 cut-off events. For 1518875/1519738 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 43963 event pairs, 0 based on Foata normal form. 78/4192 useless extension candidates. Maximal degree in co-relation 60740. Up to 991 conditions per place. [2021-10-13 22:59:42,863 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 607 selfloop transitions, 86 changer transitions 8/745 dead transitions. [2021-10-13 22:59:42,863 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 959 places, 745 transitions, 46661 flow [2021-10-13 22:59:42,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-13 22:59:42,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-10-13 22:59:42,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1828 transitions. [2021-10-13 22:59:42,864 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8393021120293848 [2021-10-13 22:59:42,864 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1828 transitions. [2021-10-13 22:59:42,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1828 transitions. [2021-10-13 22:59:42,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:59:42,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1828 transitions. [2021-10-13 22:59:42,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 55.39393939393939) internal successors, (1828), 33 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:59:42,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 66.0) internal successors, (2244), 34 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:59:42,866 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 66.0) internal successors, (2244), 34 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:59:42,866 INFO L186 Difference]: Start difference. First operand has 930 places, 708 transitions, 39763 flow. Second operand 33 states and 1828 transitions. [2021-10-13 22:59:42,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 959 places, 745 transitions, 46661 flow [2021-10-13 22:59:51,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 933 places, 745 transitions, 46213 flow, removed 191 selfloop flow, removed 26 redundant places. [2021-10-13 22:59:51,113 INFO L242 Difference]: Finished difference. Result has 938 places, 710 transitions, 39997 flow [2021-10-13 22:59:51,113 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=39493, PETRI_DIFFERENCE_MINUEND_PLACES=901, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=622, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=39997, PETRI_PLACES=938, PETRI_TRANSITIONS=710} [2021-10-13 22:59:51,113 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 872 predicate places. [2021-10-13 22:59:51,113 INFO L470 AbstractCegarLoop]: Abstraction has has 938 places, 710 transitions, 39997 flow [2021-10-13 22:59:51,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 54.074074074074076) internal successors, (1460), 27 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:59:51,114 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:59:51,114 INFO L254 CegarLoopForPetriNet]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:59:51,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-10-13 22:59:51,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-10-13 22:59:51,331 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:59:51,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:59:51,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1569794770, now seen corresponding path program 109 times [2021-10-13 22:59:51,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:59:51,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482074869] [2021-10-13 22:59:51,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:59:51,332 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:59:51,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:59:51,582 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:59:51,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:59:51,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482074869] [2021-10-13 22:59:51,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482074869] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:59:51,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360246461] [2021-10-13 22:59:51,583 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:59:51,583 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:59:51,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:59:51,584 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:59:51,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-10-13 22:59:55,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:59:55,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 22:59:55,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:59:55,548 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:59:55,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360246461] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:59:55,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:59:55,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-10-13 22:59:55,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003668204] [2021-10-13 22:59:55,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-13 22:59:55,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:59:55,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-13 22:59:55,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-10-13 22:59:55,549 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:59:55,550 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 938 places, 710 transitions, 39997 flow. Second operand has 27 states, 27 states have (on average 54.074074074074076) internal successors, (1460), 27 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:59:55,550 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:59:55,550 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:59:55,550 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:59:58,022 INFO L129 PetriNetUnfolder]: 614/4663 cut-off events. [2021-10-13 22:59:58,022 INFO L130 PetriNetUnfolder]: For 1521298/1522156 co-relation queries the response was YES. [2021-10-13 22:59:58,217 INFO L84 FinitePrefix]: Finished finitePrefix Result has 61837 conditions, 4663 events. 614/4663 cut-off events. For 1521298/1522156 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 44589 event pairs, 0 based on Foata normal form. 88/4250 useless extension candidates. Maximal degree in co-relation 61412. Up to 927 conditions per place. [2021-10-13 22:59:58,252 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 530 selfloop transitions, 173 changer transitions 8/755 dead transitions. [2021-10-13 22:59:58,253 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 970 places, 755 transitions, 47650 flow [2021-10-13 22:59:58,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-13 22:59:58,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-10-13 22:59:58,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1993 transitions. [2021-10-13 22:59:58,264 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8388047138047138 [2021-10-13 22:59:58,264 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1993 transitions. [2021-10-13 22:59:58,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1993 transitions. [2021-10-13 22:59:58,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:59:58,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1993 transitions. [2021-10-13 22:59:58,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 55.361111111111114) internal successors, (1993), 36 states have internal predecessors, (1993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:59:58,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:59:58,267 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:59:58,267 INFO L186 Difference]: Start difference. First operand has 938 places, 710 transitions, 39997 flow. Second operand 36 states and 1993 transitions. [2021-10-13 22:59:58,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 970 places, 755 transitions, 47650 flow [2021-10-13 23:00:07,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 940 places, 755 transitions, 47146 flow, removed 170 selfloop flow, removed 30 redundant places. [2021-10-13 23:00:07,128 INFO L242 Difference]: Finished difference. Result has 949 places, 716 transitions, 40819 flow [2021-10-13 23:00:07,128 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=39641, PETRI_DIFFERENCE_MINUEND_PLACES=905, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=40819, PETRI_PLACES=949, PETRI_TRANSITIONS=716} [2021-10-13 23:00:07,129 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 883 predicate places. [2021-10-13 23:00:07,129 INFO L470 AbstractCegarLoop]: Abstraction has has 949 places, 716 transitions, 40819 flow [2021-10-13 23:00:07,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 54.074074074074076) internal successors, (1460), 27 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 23:00:07,129 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 23:00:07,129 INFO L254 CegarLoopForPetriNet]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 23:00:07,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2021-10-13 23:00:07,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 23:00:07,329 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 23:00:07,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 23:00:07,329 INFO L82 PathProgramCache]: Analyzing trace with hash 179075760, now seen corresponding path program 110 times [2021-10-13 23:00:07,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 23:00:07,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797567434] [2021-10-13 23:00:07,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 23:00:07,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 23:00:07,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 23:00:07,550 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 23:00:07,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 23:00:07,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797567434] [2021-10-13 23:00:07,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797567434] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 23:00:07,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74964619] [2021-10-13 23:00:07,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 23:00:07,551 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 23:00:07,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 23:00:07,552 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 23:00:07,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-10-13 23:00:11,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 23:00:11,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 23:00:11,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 23:00:11,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 23:00:11,701 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 23:00:11,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74964619] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 23:00:11,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 23:00:11,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-10-13 23:00:11,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236690820] [2021-10-13 23:00:11,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-13 23:00:11,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 23:00:11,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-13 23:00:11,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-10-13 23:00:11,702 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 23:00:11,702 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 949 places, 716 transitions, 40819 flow. Second operand has 27 states, 27 states have (on average 54.074074074074076) internal successors, (1460), 27 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 23:00:11,703 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 23:00:11,703 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 23:00:11,703 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 23:00:14,368 INFO L129 PetriNetUnfolder]: 616/4681 cut-off events. [2021-10-13 23:00:14,368 INFO L130 PetriNetUnfolder]: For 1526805/1527663 co-relation queries the response was YES. [2021-10-13 23:00:14,462 INFO L84 FinitePrefix]: Finished finitePrefix Result has 62207 conditions, 4681 events. 616/4681 cut-off events. For 1526805/1527663 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 44751 event pairs, 0 based on Foata normal form. 122/4300 useless extension candidates. Maximal degree in co-relation 61775. Up to 931 conditions per place. [2021-10-13 23:00:14,498 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 426 selfloop transitions, 279 changer transitions 8/757 dead transitions. [2021-10-13 23:00:14,499 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 983 places, 757 transitions, 48331 flow [2021-10-13 23:00:14,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-13 23:00:14,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-10-13 23:00:14,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2105 transitions. [2021-10-13 23:00:14,500 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8393141945773525 [2021-10-13 23:00:14,500 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2105 transitions. [2021-10-13 23:00:14,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2105 transitions. [2021-10-13 23:00:14,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 23:00:14,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2105 transitions. [2021-10-13 23:00:14,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 55.39473684210526) internal successors, (2105), 38 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 23:00:14,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 66.0) internal successors, (2574), 39 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 23:00:14,503 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 66.0) internal successors, (2574), 39 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 23:00:14,503 INFO L186 Difference]: Start difference. First operand has 949 places, 716 transitions, 40819 flow. Second operand 38 states and 2105 transitions. [2021-10-13 23:00:14,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 983 places, 757 transitions, 48331 flow [2021-10-13 23:00:22,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 954 places, 757 transitions, 47695 flow, removed 174 selfloop flow, removed 29 redundant places. [2021-10-13 23:00:22,937 INFO L242 Difference]: Finished difference. Result has 959 places, 718 transitions, 41247 flow [2021-10-13 23:00:22,937 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=40339, PETRI_DIFFERENCE_MINUEND_PLACES=917, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=41247, PETRI_PLACES=959, PETRI_TRANSITIONS=718} [2021-10-13 23:00:22,937 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 893 predicate places. [2021-10-13 23:00:22,937 INFO L470 AbstractCegarLoop]: Abstraction has has 959 places, 718 transitions, 41247 flow [2021-10-13 23:00:22,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 54.074074074074076) internal successors, (1460), 27 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 23:00:22,938 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 23:00:22,938 INFO L254 CegarLoopForPetriNet]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 23:00:22,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-10-13 23:00:23,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 23:00:23,138 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 23:00:23,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 23:00:23,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1790792752, now seen corresponding path program 111 times [2021-10-13 23:00:23,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 23:00:23,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514818797] [2021-10-13 23:00:23,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 23:00:23,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 23:00:23,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 23:00:23,476 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 23:00:23,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 23:00:23,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514818797] [2021-10-13 23:00:23,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514818797] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 23:00:23,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034113499] [2021-10-13 23:00:23,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 23:00:23,476 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 23:00:23,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 23:00:23,477 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 23:00:23,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-10-13 23:00:27,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-10-13 23:00:27,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 23:00:27,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-13 23:00:27,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 23:00:27,680 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 23:00:27,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034113499] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 23:00:27,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 23:00:27,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-10-13 23:00:27,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704290475] [2021-10-13 23:00:27,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-13 23:00:27,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 23:00:27,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-13 23:00:27,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-10-13 23:00:27,681 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 23:00:27,682 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 959 places, 718 transitions, 41247 flow. Second operand has 28 states, 28 states have (on average 54.107142857142854) internal successors, (1515), 28 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 23:00:27,682 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 23:00:27,682 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 23:00:27,682 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 23:00:30,458 INFO L129 PetriNetUnfolder]: 618/4699 cut-off events. [2021-10-13 23:00:30,458 INFO L130 PetriNetUnfolder]: For 1532358/1533216 co-relation queries the response was YES. [2021-10-13 23:00:30,557 INFO L84 FinitePrefix]: Finished finitePrefix Result has 62598 conditions, 4699 events. 618/4699 cut-off events. For 1532358/1533216 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 44897 event pairs, 0 based on Foata normal form. 127/4321 useless extension candidates. Maximal degree in co-relation 62164. Up to 935 conditions per place. [2021-10-13 23:00:30,626 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 387 selfloop transitions, 321 changer transitions 8/760 dead transitions. [2021-10-13 23:00:30,626 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 994 places, 760 transitions, 48919 flow [2021-10-13 23:00:30,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-13 23:00:30,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-10-13 23:00:30,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2161 transitions. [2021-10-13 23:00:30,627 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8395493395493395 [2021-10-13 23:00:30,627 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2161 transitions. [2021-10-13 23:00:30,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2161 transitions. [2021-10-13 23:00:30,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 23:00:30,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2161 transitions. [2021-10-13 23:00:30,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 55.41025641025641) internal successors, (2161), 39 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 23:00:30,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 66.0) internal successors, (2640), 40 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 23:00:30,630 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 66.0) internal successors, (2640), 40 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 23:00:30,630 INFO L186 Difference]: Start difference. First operand has 959 places, 718 transitions, 41247 flow. Second operand 39 states and 2161 transitions. [2021-10-13 23:00:30,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 994 places, 760 transitions, 48919 flow [2021-10-13 23:00:38,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 959 places, 760 transitions, 48035 flow, removed 176 selfloop flow, removed 35 redundant places. [2021-10-13 23:00:38,559 INFO L242 Difference]: Finished difference. Result has 964 places, 720 transitions, 41523 flow [2021-10-13 23:00:38,560 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=40523, PETRI_DIFFERENCE_MINUEND_PLACES=921, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=319, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=41523, PETRI_PLACES=964, PETRI_TRANSITIONS=720} [2021-10-13 23:00:38,560 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 898 predicate places. [2021-10-13 23:00:38,560 INFO L470 AbstractCegarLoop]: Abstraction has has 964 places, 720 transitions, 41523 flow [2021-10-13 23:00:38,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 54.107142857142854) internal successors, (1515), 28 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 23:00:38,560 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 23:00:38,560 INFO L254 CegarLoopForPetriNet]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 23:00:38,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2021-10-13 23:00:38,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 23:00:38,763 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 23:00:38,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 23:00:38,764 INFO L82 PathProgramCache]: Analyzing trace with hash 254763432, now seen corresponding path program 112 times [2021-10-13 23:00:38,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 23:00:38,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596223520] [2021-10-13 23:00:38,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 23:00:38,764 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 23:00:38,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 23:00:38,997 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 23:00:38,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 23:00:38,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596223520] [2021-10-13 23:00:38,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596223520] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 23:00:38,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310506116] [2021-10-13 23:00:38,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 23:00:38,997 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 23:00:38,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 23:00:38,998 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 23:00:38,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-10-13 23:00:42,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 23:00:42,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 23:00:42,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 23:00:42,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 23:00:43,158 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 23:00:43,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310506116] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 23:00:43,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 23:00:43,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-10-13 23:00:43,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000783700] [2021-10-13 23:00:43,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-13 23:00:43,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 23:00:43,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-13 23:00:43,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-10-13 23:00:43,160 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 23:00:43,160 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 964 places, 720 transitions, 41523 flow. Second operand has 27 states, 27 states have (on average 54.074074074074076) internal successors, (1460), 27 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 23:00:43,160 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 23:00:43,160 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 23:00:43,160 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 23:00:45,881 INFO L129 PetriNetUnfolder]: 622/4735 cut-off events. [2021-10-13 23:00:45,881 INFO L130 PetriNetUnfolder]: For 1543522/1544380 co-relation queries the response was YES. [2021-10-13 23:00:45,978 INFO L84 FinitePrefix]: Finished finitePrefix Result has 63184 conditions, 4735 events. 622/4735 cut-off events. For 1543522/1544380 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 45296 event pairs, 0 based on Foata normal form. 141/4367 useless extension candidates. Maximal degree in co-relation 62748. Up to 943 conditions per place. [2021-10-13 23:00:46,015 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 343 selfloop transitions, 369 changer transitions 8/764 dead transitions. [2021-10-13 23:00:46,016 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1000 places, 764 transitions, 49547 flow [2021-10-13 23:00:46,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-13 23:00:46,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-10-13 23:00:46,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2217 transitions. [2021-10-13 23:00:46,017 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8397727272727272 [2021-10-13 23:00:46,017 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2217 transitions. [2021-10-13 23:00:46,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2217 transitions. [2021-10-13 23:00:46,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 23:00:46,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2217 transitions. [2021-10-13 23:00:46,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 55.425) internal successors, (2217), 40 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 23:00:46,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 66.0) internal successors, (2706), 41 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 23:00:46,020 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 66.0) internal successors, (2706), 41 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 23:00:46,020 INFO L186 Difference]: Start difference. First operand has 964 places, 720 transitions, 41523 flow. Second operand 40 states and 2217 transitions. [2021-10-13 23:00:46,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1000 places, 764 transitions, 49547 flow [2021-10-13 23:00:54,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 963 places, 764 transitions, 48533 flow, removed 178 selfloop flow, removed 37 redundant places. [2021-10-13 23:00:54,488 INFO L242 Difference]: Finished difference. Result has 968 places, 724 transitions, 41974 flow [2021-10-13 23:00:54,488 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=40673, PETRI_DIFFERENCE_MINUEND_PLACES=924, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=365, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=41974, PETRI_PLACES=968, PETRI_TRANSITIONS=724} [2021-10-13 23:00:54,488 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 902 predicate places. [2021-10-13 23:00:54,488 INFO L470 AbstractCegarLoop]: Abstraction has has 968 places, 724 transitions, 41974 flow [2021-10-13 23:00:54,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 54.074074074074076) internal successors, (1460), 27 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 23:00:54,488 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 23:00:54,488 INFO L254 CegarLoopForPetriNet]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 23:00:54,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2021-10-13 23:00:54,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 23:00:54,689 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 23:00:54,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 23:00:54,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1442893922, now seen corresponding path program 113 times [2021-10-13 23:00:54,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 23:00:54,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533404792] [2021-10-13 23:00:54,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 23:00:54,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 23:00:54,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 23:00:54,909 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 23:00:54,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 23:00:54,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533404792] [2021-10-13 23:00:54,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533404792] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 23:00:54,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840874284] [2021-10-13 23:00:54,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 23:00:54,910 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 23:00:54,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 23:00:54,910 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 23:00:54,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-10-13 23:00:58,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-10-13 23:00:58,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 23:00:58,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 23:00:58,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 23:00:59,113 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 23:00:59,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840874284] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 23:00:59,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 23:00:59,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-10-13 23:00:59,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033664526] [2021-10-13 23:00:59,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-13 23:00:59,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 23:00:59,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-13 23:00:59,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-10-13 23:00:59,115 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 23:00:59,115 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 968 places, 724 transitions, 41974 flow. Second operand has 27 states, 27 states have (on average 54.074074074074076) internal successors, (1460), 27 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 23:00:59,115 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 23:00:59,115 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 23:00:59,115 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 23:01:01,936 INFO L129 PetriNetUnfolder]: 624/4753 cut-off events. [2021-10-13 23:01:01,936 INFO L130 PetriNetUnfolder]: For 1548962/1549820 co-relation queries the response was YES. [2021-10-13 23:01:02,033 INFO L84 FinitePrefix]: Finished finitePrefix Result has 63489 conditions, 4753 events. 624/4753 cut-off events. For 1548962/1549820 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 45533 event pairs, 0 based on Foata normal form. 158/4400 useless extension candidates. Maximal degree in co-relation 63051. Up to 947 conditions per place. [2021-10-13 23:01:02,071 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 291 selfloop transitions, 424 changer transitions 8/767 dead transitions. [2021-10-13 23:01:02,071 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1006 places, 767 transitions, 50116 flow [2021-10-13 23:01:02,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-13 23:01:02,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-10-13 23:01:02,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2329 transitions. [2021-10-13 23:01:02,072 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8401875901875901 [2021-10-13 23:01:02,072 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2329 transitions. [2021-10-13 23:01:02,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2329 transitions. [2021-10-13 23:01:02,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 23:01:02,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2329 transitions. [2021-10-13 23:01:02,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 55.45238095238095) internal successors, (2329), 42 states have internal predecessors, (2329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 23:01:02,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 66.0) internal successors, (2838), 43 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 23:01:02,075 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 66.0) internal successors, (2838), 43 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 23:01:02,075 INFO L186 Difference]: Start difference. First operand has 968 places, 724 transitions, 41974 flow. Second operand 42 states and 2329 transitions. [2021-10-13 23:01:02,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1006 places, 767 transitions, 50116 flow [2021-10-13 23:01:09,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 976 places, 767 transitions, 49264 flow, removed 182 selfloop flow, removed 30 redundant places. [2021-10-13 23:01:09,892 INFO L242 Difference]: Finished difference. Result has 981 places, 726 transitions, 42516 flow [2021-10-13 23:01:09,892 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=41294, PETRI_DIFFERENCE_MINUEND_PLACES=935, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=422, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=42516, PETRI_PLACES=981, PETRI_TRANSITIONS=726} [2021-10-13 23:01:09,892 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 915 predicate places. [2021-10-13 23:01:09,893 INFO L470 AbstractCegarLoop]: Abstraction has has 981 places, 726 transitions, 42516 flow [2021-10-13 23:01:09,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 54.074074074074076) internal successors, (1460), 27 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 23:01:09,893 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 23:01:09,893 INFO L254 CegarLoopForPetriNet]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 23:01:09,926 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2021-10-13 23:01:10,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 23:01:10,093 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 23:01:10,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 23:01:10,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1642369034, now seen corresponding path program 114 times [2021-10-13 23:01:10,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 23:01:10,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49946816] [2021-10-13 23:01:10,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 23:01:10,094 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 23:01:10,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 23:01:10,292 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 23:01:10,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 23:01:10,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49946816] [2021-10-13 23:01:10,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49946816] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 23:01:10,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82667273] [2021-10-13 23:01:10,293 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 23:01:10,293 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 23:01:10,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 23:01:10,293 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 23:01:10,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-10-13 23:01:14,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-10-13 23:01:14,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 23:01:14,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 23:01:14,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 23:01:14,477 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 23:01:14,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82667273] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 23:01:14,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 23:01:14,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-10-13 23:01:14,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620799373] [2021-10-13 23:01:14,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-13 23:01:14,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 23:01:14,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-13 23:01:14,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-10-13 23:01:14,478 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 23:01:14,479 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 981 places, 726 transitions, 42516 flow. Second operand has 27 states, 27 states have (on average 54.074074074074076) internal successors, (1460), 27 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 23:01:14,479 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 23:01:14,479 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 23:01:14,479 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 23:01:17,532 INFO L129 PetriNetUnfolder]: 626/4778 cut-off events. [2021-10-13 23:01:17,533 INFO L130 PetriNetUnfolder]: For 1555902/1556704 co-relation queries the response was YES. [2021-10-13 23:01:17,632 INFO L84 FinitePrefix]: Finished finitePrefix Result has 63946 conditions, 4778 events. 626/4778 cut-off events. For 1555902/1556704 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 45818 event pairs, 0 based on Foata normal form. 185/4449 useless extension candidates. Maximal degree in co-relation 63506. Up to 951 conditions per place. [2021-10-13 23:01:17,670 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 203 selfloop transitions, 518 changer transitions 8/773 dead transitions. [2021-10-13 23:01:17,670 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1023 places, 773 transitions, 51298 flow [2021-10-13 23:01:17,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-10-13 23:01:17,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-10-13 23:01:17,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2553 transitions. [2021-10-13 23:01:17,671 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8409090909090909 [2021-10-13 23:01:17,671 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2553 transitions. [2021-10-13 23:01:17,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2553 transitions. [2021-10-13 23:01:17,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 23:01:17,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2553 transitions. [2021-10-13 23:01:17,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 55.5) internal successors, (2553), 46 states have internal predecessors, (2553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 23:01:17,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 66.0) internal successors, (3102), 47 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 23:01:17,674 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 66.0) internal successors, (3102), 47 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 23:01:17,674 INFO L186 Difference]: Start difference. First operand has 981 places, 726 transitions, 42516 flow. Second operand 46 states and 2553 transitions. [2021-10-13 23:01:17,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1023 places, 773 transitions, 51298 flow [2021-10-13 23:01:26,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 983 places, 773 transitions, 50062 flow, removed 190 selfloop flow, removed 40 redundant places. [2021-10-13 23:01:26,608 INFO L242 Difference]: Finished difference. Result has 988 places, 728 transitions, 42896 flow [2021-10-13 23:01:26,608 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=41468, PETRI_DIFFERENCE_MINUEND_PLACES=938, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=516, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=42896, PETRI_PLACES=988, PETRI_TRANSITIONS=728} [2021-10-13 23:01:26,609 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 922 predicate places. [2021-10-13 23:01:26,609 INFO L470 AbstractCegarLoop]: Abstraction has has 988 places, 728 transitions, 42896 flow [2021-10-13 23:01:26,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 54.074074074074076) internal successors, (1460), 27 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 23:01:26,609 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 23:01:26,609 INFO L254 CegarLoopForPetriNet]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 23:01:26,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2021-10-13 23:01:26,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-10-13 23:01:26,823 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 23:01:26,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 23:01:26,823 INFO L82 PathProgramCache]: Analyzing trace with hash 208528256, now seen corresponding path program 115 times [2021-10-13 23:01:26,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 23:01:26,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199250450] [2021-10-13 23:01:26,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 23:01:26,824 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 23:01:26,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 23:01:27,059 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 23:01:27,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 23:01:27,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199250450] [2021-10-13 23:01:27,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199250450] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 23:01:27,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534614719] [2021-10-13 23:01:27,060 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 23:01:27,060 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 23:01:27,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 23:01:27,060 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 23:01:27,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-10-13 23:01:30,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 23:01:30,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 23:01:30,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 23:01:31,196 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 23:01:31,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534614719] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 23:01:31,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 23:01:31,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-10-13 23:01:31,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120315460] [2021-10-13 23:01:31,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-13 23:01:31,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 23:01:31,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-13 23:01:31,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-10-13 23:01:31,198 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 23:01:31,198 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 988 places, 728 transitions, 42896 flow. Second operand has 27 states, 27 states have (on average 54.074074074074076) internal successors, (1460), 27 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 23:01:31,198 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 23:01:31,198 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 23:01:31,198 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 23:01:34,101 INFO L129 PetriNetUnfolder]: 630/4807 cut-off events. [2021-10-13 23:01:34,101 INFO L130 PetriNetUnfolder]: For 1567987/1568845 co-relation queries the response was YES. [2021-10-13 23:01:34,200 INFO L84 FinitePrefix]: Finished finitePrefix Result has 64553 conditions, 4807 events. 630/4807 cut-off events. For 1567987/1568845 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 46226 event pairs, 0 based on Foata normal form. 201/4492 useless extension candidates. Maximal degree in co-relation 64111. Up to 959 conditions per place. [2021-10-13 23:01:34,236 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 168 selfloop transitions, 559 changer transitions 8/779 dead transitions. [2021-10-13 23:01:34,236 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1032 places, 779 transitions, 52150 flow [2021-10-13 23:01:34,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-10-13 23:01:34,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-10-13 23:01:34,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2665 transitions. [2021-10-13 23:01:34,238 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8412247474747475 [2021-10-13 23:01:34,238 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2665 transitions. [2021-10-13 23:01:34,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2665 transitions. [2021-10-13 23:01:34,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 23:01:34,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2665 transitions. [2021-10-13 23:01:34,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 55.520833333333336) internal successors, (2665), 48 states have internal predecessors, (2665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 23:01:34,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 66.0) internal successors, (3234), 49 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 23:01:34,241 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 66.0) internal successors, (3234), 49 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 23:01:34,241 INFO L186 Difference]: Start difference. First operand has 988 places, 728 transitions, 42896 flow. Second operand 48 states and 2665 transitions. [2021-10-13 23:01:34,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1032 places, 779 transitions, 52150 flow Received shutdown request... [2021-10-13 23:01:42,248 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 23:01:42,268 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-13 23:01:42,269 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 [2021-10-13 23:01:42,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2021-10-13 23:01:42,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-10-13 23:01:42,449 WARN L594 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2021-10-13 23:01:42,450 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-13 23:01:42,450 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-13 23:01:42,453 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-13 23:01:42,453 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 23:01:42,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 11:01:42 BasicIcfg [2021-10-13 23:01:42,454 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 23:01:42,455 INFO L168 Benchmark]: Toolchain (without parser) took 774461.57 ms. Allocated memory was 197.1 MB in the beginning and 3.1 GB in the end (delta: 2.9 GB). Free memory was 146.8 MB in the beginning and 2.0 GB in the end (delta: -1.8 GB). Peak memory consumption was 1.5 GB. Max. memory is 8.0 GB. [2021-10-13 23:01:42,455 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 197.1 MB. Free memory was 164.2 MB in the beginning and 164.1 MB in the end (delta: 60.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-10-13 23:01:42,455 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.60 ms. Allocated memory was 197.1 MB in the beginning and 237.0 MB in the end (delta: 39.8 MB). Free memory was 176.7 MB in the beginning and 205.7 MB in the end (delta: -29.0 MB). Peak memory consumption was 14.2 MB. Max. memory is 8.0 GB. [2021-10-13 23:01:42,456 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.33 ms. Allocated memory is still 237.0 MB. Free memory was 205.7 MB in the beginning and 204.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-10-13 23:01:42,456 INFO L168 Benchmark]: Boogie Preprocessor took 19.87 ms. Allocated memory is still 237.0 MB. Free memory was 204.0 MB in the beginning and 202.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-13 23:01:42,456 INFO L168 Benchmark]: RCFGBuilder took 275.08 ms. Allocated memory is still 237.0 MB. Free memory was 202.5 MB in the beginning and 190.6 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-10-13 23:01:42,456 INFO L168 Benchmark]: TraceAbstraction took 773832.78 ms. Allocated memory was 237.0 MB in the beginning and 3.1 GB in the end (delta: 2.8 GB). Free memory was 190.4 MB in the beginning and 2.0 GB in the end (delta: -1.8 GB). Peak memory consumption was 1.5 GB. Max. memory is 8.0 GB. [2021-10-13 23:01:42,457 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 197.1 MB. Free memory was 164.2 MB in the beginning and 164.1 MB in the end (delta: 60.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 288.60 ms. Allocated memory was 197.1 MB in the beginning and 237.0 MB in the end (delta: 39.8 MB). Free memory was 176.7 MB in the beginning and 205.7 MB in the end (delta: -29.0 MB). Peak memory consumption was 14.2 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 34.33 ms. Allocated memory is still 237.0 MB. Free memory was 205.7 MB in the beginning and 204.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 19.87 ms. Allocated memory is still 237.0 MB. Free memory was 204.0 MB in the beginning and 202.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 275.08 ms. Allocated memory is still 237.0 MB. Free memory was 202.5 MB in the beginning and 190.6 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 773832.78 ms. Allocated memory was 237.0 MB in the beginning and 3.1 GB in the end (delta: 2.8 GB). Free memory was 190.4 MB in the beginning and 2.0 GB in the end (delta: -1.8 GB). Peak memory consumption was 1.5 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 722]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 713]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 714]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 13.3ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 773736.7ms, OverallIterations: 124, TraceHistogramMax: 11, EmptinessCheckTime: 0.0ms, AutomataDifference: 484450.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 64.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 572 SDtfs, 5256 SDslu, 1739 SDs, 0 SdLazy, 17808 SolverSat, 12260 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9018.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16814 GetRequests, 11815 SyntacticMatches, 0 SemanticMatches, 4999 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52861 ImplicationChecksByTransitivity, 39877.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=42896occurred in iteration=123, InterpolantAutomatonStates: 3640, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1024.2ms SsaConstructionTime, 3108.1ms SatisfiabilityAnalysisTime, 51926.4ms InterpolantComputationTime, 23794 NumberOfCodeBlocks, 23794 NumberOfCodeBlocksAsserted, 700 NumberOfCheckSat, 23551 ConstructedInterpolants, 0 QuantifiedInterpolants, 102741 SizeOfPredicates, 1762 NumberOfNonLiveVariables, 25314 ConjunctsInSsa, 2433 ConjunctsInUnsatCore, 243 InterpolantComputations, 5 PerfectInterpolantSequences, 42/48346 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