/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/fib_bench_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-231806ee773fbd0554de777ff4074f5592c67ff4-231806e [2021-10-13 22:45:38,487 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 22:45:38,489 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 22:45:38,524 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 22:45:38,524 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 22:45:38,525 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 22:45:38,526 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 22:45:38,527 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 22:45:38,528 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 22:45:38,529 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 22:45:38,529 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 22:45:38,530 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 22:45:38,530 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 22:45:38,531 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 22:45:38,531 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 22:45:38,532 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 22:45:38,533 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 22:45:38,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 22:45:38,534 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 22:45:38,535 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 22:45:38,536 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 22:45:38,537 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 22:45:38,538 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 22:45:38,538 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 22:45:38,540 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 22:45:38,540 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 22:45:38,540 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 22:45:38,541 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 22:45:38,541 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 22:45:38,542 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 22:45:38,542 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 22:45:38,542 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 22:45:38,543 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 22:45:38,543 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 22:45:38,544 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 22:45:38,544 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 22:45:38,545 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 22:45:38,545 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 22:45:38,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 22:45:38,545 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 22:45:38,546 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 22:45:38,547 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 22:45:38,559 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 22:45:38,559 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 22:45:38,560 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 22:45:38,560 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 22:45:38,561 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 22:45:38,561 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 22:45:38,561 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 22:45:38,561 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 22:45:38,561 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 22:45:38,561 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 22:45:38,561 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 22:45:38,561 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 22:45:38,561 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 22:45:38,561 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 22:45:38,562 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 22:45:38,562 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 22:45:38,562 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 22:45:38,562 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 22:45:38,562 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 22:45:38,562 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-10-13 22:45:38,562 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 22:45:38,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 22:45:38,562 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 22:45:38,562 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 22:45:38,562 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 22:45:38,563 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 22:45:38,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 22:45:38,563 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-13 22:45:38,563 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-13 22:45:38,563 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-13 22:45:38,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 22:45:38,751 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 22:45:38,753 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 22:45:38,754 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 22:45:38,754 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 22:45:38,755 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2021-10-13 22:45:38,811 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44594b5d7/0f2b2bcc457f4d8bbf9b75b9268055f0/FLAG4b39bfdbf [2021-10-13 22:45:39,311 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 22:45:39,312 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2021-10-13 22:45:39,335 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44594b5d7/0f2b2bcc457f4d8bbf9b75b9268055f0/FLAG4b39bfdbf [2021-10-13 22:45:39,721 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44594b5d7/0f2b2bcc457f4d8bbf9b75b9268055f0 [2021-10-13 22:45:39,723 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 22:45:39,728 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 22:45:39,732 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 22:45:39,732 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 22:45:39,737 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 22:45:39,737 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:45:39" (1/1) ... [2021-10-13 22:45:39,738 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66b2578e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:45:39, skipping insertion in model container [2021-10-13 22:45:39,738 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:45:39" (1/1) ... [2021-10-13 22:45:39,753 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 22:45:39,821 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 22:45:40,021 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/fib_bench_longest-1.i[30286,30299] [2021-10-13 22:45:40,031 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/fib_bench_longest-1.i[31038,31051] [2021-10-13 22:45:40,031 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 22:45:40,037 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 22:45:40,080 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/fib_bench_longest-1.i[30286,30299] [2021-10-13 22:45:40,087 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/fib_bench_longest-1.i[31038,31051] [2021-10-13 22:45:40,087 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 22:45:40,113 INFO L208 MainTranslator]: Completed translation [2021-10-13 22:45:40,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:45:40 WrapperNode [2021-10-13 22:45:40,114 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 22:45:40,115 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 22:45:40,115 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 22:45:40,115 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 22:45:40,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:45:40" (1/1) ... [2021-10-13 22:45:40,141 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:45:40" (1/1) ... [2021-10-13 22:45:40,157 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 22:45:40,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 22:45:40,158 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 22:45:40,158 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 22:45:40,163 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:45:40" (1/1) ... [2021-10-13 22:45:40,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:45:40" (1/1) ... [2021-10-13 22:45:40,167 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:45:40" (1/1) ... [2021-10-13 22:45:40,167 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:45:40" (1/1) ... [2021-10-13 22:45:40,170 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:45:40" (1/1) ... [2021-10-13 22:45:40,173 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:45:40" (1/1) ... [2021-10-13 22:45:40,179 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:45:40" (1/1) ... [2021-10-13 22:45:40,181 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 22:45:40,181 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 22:45:40,181 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 22:45:40,181 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 22:45:40,184 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:45:40" (1/1) ... [2021-10-13 22:45:40,198 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 22:45:40,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:45:40,235 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 22:45:40,268 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 22:45:40,289 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-10-13 22:45:40,291 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-10-13 22:45:40,291 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-10-13 22:45:40,291 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-10-13 22:45:40,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 22:45:40,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-13 22:45:40,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 22:45:40,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 22:45:40,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 22:45:40,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-13 22:45:40,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 22:45:40,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 22:45:40,293 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 22:45:40,662 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 22:45:40,663 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-13 22:45:40,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:45:40 BoogieIcfgContainer [2021-10-13 22:45:40,664 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 22:45:40,665 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 22:45:40,665 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 22:45:40,675 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 22:45:40,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:45:39" (1/3) ... [2021-10-13 22:45:40,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36fb3080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:45:40, skipping insertion in model container [2021-10-13 22:45:40,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:45:40" (2/3) ... [2021-10-13 22:45:40,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36fb3080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:45:40, skipping insertion in model container [2021-10-13 22:45:40,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:45:40" (3/3) ... [2021-10-13 22:45:40,677 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-1.i [2021-10-13 22:45:40,686 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 22:45:40,686 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 22:45:40,686 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-13 22:45:40,728 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,728 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,728 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,728 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,729 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,729 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,729 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,729 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,736 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,736 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,736 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,736 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,737 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,737 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,737 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,737 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,737 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,737 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,737 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,737 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,737 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,738 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,738 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,738 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,738 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,738 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,738 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,738 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,738 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,738 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,739 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,739 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,739 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,739 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,739 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,739 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,739 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,739 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,739 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,739 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,739 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,740 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,740 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,740 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,740 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,740 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,740 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,740 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,740 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,740 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,741 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,741 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,741 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,741 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,741 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,741 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,741 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,741 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,741 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,741 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,743 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,744 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,744 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,744 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,744 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,744 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,754 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,755 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,755 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,755 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,755 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,755 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:40,757 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-10-13 22:45:40,788 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 22:45:40,792 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 22:45:40,792 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-13 22:45:40,799 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 70 places, 68 transitions, 146 flow [2021-10-13 22:45:40,823 INFO L129 PetriNetUnfolder]: 5/66 cut-off events. [2021-10-13 22:45:40,823 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-13 22:45:40,826 INFO L84 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 66 events. 5/66 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 73 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2021-10-13 22:45:40,826 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 68 transitions, 146 flow [2021-10-13 22:45:40,829 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 66 transitions, 138 flow [2021-10-13 22:45:40,842 INFO L129 PetriNetUnfolder]: 3/53 cut-off events. [2021-10-13 22:45:40,842 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-13 22:45:40,842 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:40,843 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 22:45:40,843 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:40,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:40,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1527992754, now seen corresponding path program 1 times [2021-10-13 22:45:40,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:40,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228191454] [2021-10-13 22:45:40,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:40,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:40,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:41,304 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 22:45:41,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:41,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228191454] [2021-10-13 22:45:41,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228191454] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 22:45:41,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 22:45:41,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 22:45:41,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121452637] [2021-10-13 22:45:41,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 22:45:41,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:41,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 22:45:41,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-13 22:45:41,333 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:41,338 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 56.0) internal successors, (336), 6 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:41,338 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:41,338 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:41,339 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:41,549 INFO L129 PetriNetUnfolder]: 44/203 cut-off events. [2021-10-13 22:45:41,550 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-13 22:45:41,567 INFO L84 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 203 events. 44/203 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 767 event pairs, 3 based on Foata normal form. 48/232 useless extension candidates. Maximal degree in co-relation 252. Up to 29 conditions per place. [2021-10-13 22:45:41,570 INFO L132 encePairwiseOnDemand]: 57/68 looper letters, 11 selfloop transitions, 9 changer transitions 23/89 dead transitions. [2021-10-13 22:45:41,570 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 89 transitions, 256 flow [2021-10-13 22:45:41,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 22:45:41,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-13 22:45:41,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 610 transitions. [2021-10-13 22:45:41,597 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8970588235294118 [2021-10-13 22:45:41,597 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 610 transitions. [2021-10-13 22:45:41,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 610 transitions. [2021-10-13 22:45:41,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:41,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 610 transitions. [2021-10-13 22:45:41,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 61.0) internal successors, (610), 10 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:41,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 68.0) internal successors, (748), 11 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:41,617 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 68.0) internal successors, (748), 11 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:41,618 INFO L186 Difference]: Start difference. First operand has 68 places, 66 transitions, 138 flow. Second operand 10 states and 610 transitions. [2021-10-13 22:45:41,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 89 transitions, 256 flow [2021-10-13 22:45:41,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 89 transitions, 254 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-13 22:45:41,622 INFO L242 Difference]: Finished difference. Result has 81 places, 63 transitions, 179 flow [2021-10-13 22:45:41,623 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=179, PETRI_PLACES=81, PETRI_TRANSITIONS=63} [2021-10-13 22:45:41,624 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 13 predicate places. [2021-10-13 22:45:41,624 INFO L470 AbstractCegarLoop]: Abstraction has has 81 places, 63 transitions, 179 flow [2021-10-13 22:45:41,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.0) internal successors, (336), 6 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:41,624 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:41,624 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] [2021-10-13 22:45:41,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 22:45:41,625 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:41,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:41,625 INFO L82 PathProgramCache]: Analyzing trace with hash 42342464, now seen corresponding path program 1 times [2021-10-13 22:45:41,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:41,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703710112] [2021-10-13 22:45:41,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:41,626 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:41,865 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 22:45:41,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:41,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703710112] [2021-10-13 22:45:41,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703710112] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 22:45:41,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 22:45:41,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-13 22:45:41,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469063258] [2021-10-13 22:45:41,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 22:45:41,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:41,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 22:45:41,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-13 22:45:41,869 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:41,869 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 63 transitions, 179 flow. Second operand has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:41,869 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:41,869 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:41,870 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:42,037 INFO L129 PetriNetUnfolder]: 36/172 cut-off events. [2021-10-13 22:45:42,037 INFO L130 PetriNetUnfolder]: For 93/107 co-relation queries the response was YES. [2021-10-13 22:45:42,039 INFO L84 FinitePrefix]: Finished finitePrefix Result has 326 conditions, 172 events. 36/172 cut-off events. For 93/107 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 571 event pairs, 0 based on Foata normal form. 13/169 useless extension candidates. Maximal degree in co-relation 289. Up to 36 conditions per place. [2021-10-13 22:45:42,041 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 12 selfloop transitions, 17 changer transitions 8/83 dead transitions. [2021-10-13 22:45:42,041 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 83 transitions, 346 flow [2021-10-13 22:45:42,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 22:45:42,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-13 22:45:42,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 641 transitions. [2021-10-13 22:45:42,043 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.856951871657754 [2021-10-13 22:45:42,043 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 641 transitions. [2021-10-13 22:45:42,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 641 transitions. [2021-10-13 22:45:42,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:42,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 641 transitions. [2021-10-13 22:45:42,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.27272727272727) internal successors, (641), 11 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:42,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 68.0) internal successors, (816), 12 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:42,061 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 68.0) internal successors, (816), 12 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:42,061 INFO L186 Difference]: Start difference. First operand has 81 places, 63 transitions, 179 flow. Second operand 11 states and 641 transitions. [2021-10-13 22:45:42,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 83 transitions, 346 flow [2021-10-13 22:45:42,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 83 transitions, 330 flow, removed 8 selfloop flow, removed 4 redundant places. [2021-10-13 22:45:42,067 INFO L242 Difference]: Finished difference. Result has 81 places, 71 transitions, 274 flow [2021-10-13 22:45:42,067 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=274, PETRI_PLACES=81, PETRI_TRANSITIONS=71} [2021-10-13 22:45:42,068 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 13 predicate places. [2021-10-13 22:45:42,068 INFO L470 AbstractCegarLoop]: Abstraction has has 81 places, 71 transitions, 274 flow [2021-10-13 22:45:42,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:42,068 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:42,069 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] [2021-10-13 22:45:42,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 22:45:42,069 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:42,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:42,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1321610138, now seen corresponding path program 1 times [2021-10-13 22:45:42,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:42,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787361480] [2021-10-13 22:45:42,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:42,072 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:42,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:42,241 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 22:45:42,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:42,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787361480] [2021-10-13 22:45:42,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787361480] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 22:45:42,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 22:45:42,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-13 22:45:42,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185140801] [2021-10-13 22:45:42,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 22:45:42,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:42,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 22:45:42,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 22:45:42,246 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:42,247 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 71 transitions, 274 flow. Second operand has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:42,247 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:42,247 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:42,247 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:42,320 INFO L129 PetriNetUnfolder]: 39/192 cut-off events. [2021-10-13 22:45:42,321 INFO L130 PetriNetUnfolder]: For 248/271 co-relation queries the response was YES. [2021-10-13 22:45:42,322 INFO L84 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 192 events. 39/192 cut-off events. For 248/271 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 666 event pairs, 0 based on Foata normal form. 16/190 useless extension candidates. Maximal degree in co-relation 409. Up to 39 conditions per place. [2021-10-13 22:45:42,324 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 19 selfloop transitions, 13 changer transitions 10/88 dead transitions. [2021-10-13 22:45:42,324 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 88 transitions, 480 flow [2021-10-13 22:45:42,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 22:45:42,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-13 22:45:42,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 641 transitions. [2021-10-13 22:45:42,326 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.856951871657754 [2021-10-13 22:45:42,326 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 641 transitions. [2021-10-13 22:45:42,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 641 transitions. [2021-10-13 22:45:42,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:42,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 641 transitions. [2021-10-13 22:45:42,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.27272727272727) internal successors, (641), 11 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:42,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 68.0) internal successors, (816), 12 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:42,333 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 68.0) internal successors, (816), 12 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:42,337 INFO L186 Difference]: Start difference. First operand has 81 places, 71 transitions, 274 flow. Second operand 11 states and 641 transitions. [2021-10-13 22:45:42,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 88 transitions, 480 flow [2021-10-13 22:45:42,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 88 transitions, 451 flow, removed 7 selfloop flow, removed 5 redundant places. [2021-10-13 22:45:42,344 INFO L242 Difference]: Finished difference. Result has 89 places, 74 transitions, 321 flow [2021-10-13 22:45:42,344 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=321, PETRI_PLACES=89, PETRI_TRANSITIONS=74} [2021-10-13 22:45:42,344 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 21 predicate places. [2021-10-13 22:45:42,344 INFO L470 AbstractCegarLoop]: Abstraction has has 89 places, 74 transitions, 321 flow [2021-10-13 22:45:42,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:42,345 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:42,345 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] [2021-10-13 22:45:42,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 22:45:42,345 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:42,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:42,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1681354572, now seen corresponding path program 2 times [2021-10-13 22:45:42,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:42,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617878724] [2021-10-13 22:45:42,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:42,347 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:42,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:42,465 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 22:45:42,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:42,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617878724] [2021-10-13 22:45:42,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617878724] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 22:45:42,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 22:45:42,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-13 22:45:42,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16066371] [2021-10-13 22:45:42,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 22:45:42,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:42,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 22:45:42,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-13 22:45:42,468 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:42,468 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 74 transitions, 321 flow. Second operand has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:42,468 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:42,468 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:42,468 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:42,604 INFO L129 PetriNetUnfolder]: 43/220 cut-off events. [2021-10-13 22:45:42,604 INFO L130 PetriNetUnfolder]: For 464/497 co-relation queries the response was YES. [2021-10-13 22:45:42,605 INFO L84 FinitePrefix]: Finished finitePrefix Result has 576 conditions, 220 events. 43/220 cut-off events. For 464/497 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 865 event pairs, 0 based on Foata normal form. 16/215 useless extension candidates. Maximal degree in co-relation 529. Up to 41 conditions per place. [2021-10-13 22:45:42,606 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 19 selfloop transitions, 19 changer transitions 10/94 dead transitions. [2021-10-13 22:45:42,606 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 94 transitions, 603 flow [2021-10-13 22:45:42,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 22:45:42,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-13 22:45:42,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 699 transitions. [2021-10-13 22:45:42,621 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8566176470588235 [2021-10-13 22:45:42,621 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 699 transitions. [2021-10-13 22:45:42,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 699 transitions. [2021-10-13 22:45:42,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:42,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 699 transitions. [2021-10-13 22:45:42,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.25) internal successors, (699), 12 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:42,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 68.0) internal successors, (884), 13 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:42,625 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 68.0) internal successors, (884), 13 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:42,625 INFO L186 Difference]: Start difference. First operand has 89 places, 74 transitions, 321 flow. Second operand 12 states and 699 transitions. [2021-10-13 22:45:42,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 94 transitions, 603 flow [2021-10-13 22:45:42,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 94 transitions, 565 flow, removed 9 selfloop flow, removed 6 redundant places. [2021-10-13 22:45:42,631 INFO L242 Difference]: Finished difference. Result has 97 places, 80 transitions, 416 flow [2021-10-13 22:45:42,631 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=416, PETRI_PLACES=97, PETRI_TRANSITIONS=80} [2021-10-13 22:45:42,631 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 29 predicate places. [2021-10-13 22:45:42,632 INFO L470 AbstractCegarLoop]: Abstraction has has 97 places, 80 transitions, 416 flow [2021-10-13 22:45:42,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:42,632 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:42,632 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] [2021-10-13 22:45:42,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 22:45:42,632 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:42,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:42,633 INFO L82 PathProgramCache]: Analyzing trace with hash -2120605669, now seen corresponding path program 1 times [2021-10-13 22:45:42,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:42,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989521278] [2021-10-13 22:45:42,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:42,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:42,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:42,821 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 22:45:42,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:42,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989521278] [2021-10-13 22:45:42,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989521278] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:42,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411772380] [2021-10-13 22:45:42,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:42,822 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:42,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:45:42,824 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 22:45:42,882 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 22:45:42,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:42,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 22:45:42,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:45:43,364 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 22:45:43,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411772380] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:43,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:45:43,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-13 22:45:43,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502976664] [2021-10-13 22:45:43,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 22:45:43,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:43,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 22:45:43,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-10-13 22:45:43,367 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:43,368 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 80 transitions, 416 flow. Second operand has 13 states, 13 states have (on average 56.15384615384615) internal successors, (730), 13 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:43,368 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:43,368 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:43,368 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:43,507 INFO L129 PetriNetUnfolder]: 55/297 cut-off events. [2021-10-13 22:45:43,507 INFO L130 PetriNetUnfolder]: For 920/958 co-relation queries the response was YES. [2021-10-13 22:45:43,509 INFO L84 FinitePrefix]: Finished finitePrefix Result has 835 conditions, 297 events. 55/297 cut-off events. For 920/958 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1275 event pairs, 0 based on Foata normal form. 20/288 useless extension candidates. Maximal degree in co-relation 783. Up to 59 conditions per place. [2021-10-13 22:45:43,510 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 18 selfloop transitions, 37 changer transitions 11/112 dead transitions. [2021-10-13 22:45:43,510 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 112 transitions, 918 flow [2021-10-13 22:45:43,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 22:45:43,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-13 22:45:43,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 930 transitions. [2021-10-13 22:45:43,512 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8547794117647058 [2021-10-13 22:45:43,512 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 930 transitions. [2021-10-13 22:45:43,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 930 transitions. [2021-10-13 22:45:43,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:43,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 930 transitions. [2021-10-13 22:45:43,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 58.125) internal successors, (930), 16 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:43,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 68.0) internal successors, (1156), 17 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:43,516 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 68.0) internal successors, (1156), 17 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:43,516 INFO L186 Difference]: Start difference. First operand has 97 places, 80 transitions, 416 flow. Second operand 16 states and 930 transitions. [2021-10-13 22:45:43,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 112 transitions, 918 flow [2021-10-13 22:45:43,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 112 transitions, 809 flow, removed 42 selfloop flow, removed 8 redundant places. [2021-10-13 22:45:43,520 INFO L242 Difference]: Finished difference. Result has 109 places, 98 transitions, 654 flow [2021-10-13 22:45:43,521 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=654, PETRI_PLACES=109, PETRI_TRANSITIONS=98} [2021-10-13 22:45:43,521 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 41 predicate places. [2021-10-13 22:45:43,521 INFO L470 AbstractCegarLoop]: Abstraction has has 109 places, 98 transitions, 654 flow [2021-10-13 22:45:43,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.15384615384615) internal successors, (730), 13 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:43,521 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:43,521 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:45:43,545 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 22:45:43,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:43,737 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:43,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:43,737 INFO L82 PathProgramCache]: Analyzing trace with hash -315823260, now seen corresponding path program 1 times [2021-10-13 22:45:43,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:43,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501892726] [2021-10-13 22:45:43,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:43,738 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:43,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:43,829 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 22:45:43,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:43,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501892726] [2021-10-13 22:45:43,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501892726] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 22:45:43,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 22:45:43,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-13 22:45:43,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237730426] [2021-10-13 22:45:43,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 22:45:43,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:43,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 22:45:43,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-13 22:45:43,832 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:43,833 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 98 transitions, 654 flow. Second operand has 8 states, 8 states have (on average 56.0) internal successors, (448), 8 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:43,833 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:43,833 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:43,833 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:43,955 INFO L129 PetriNetUnfolder]: 52/286 cut-off events. [2021-10-13 22:45:43,956 INFO L130 PetriNetUnfolder]: For 924/953 co-relation queries the response was YES. [2021-10-13 22:45:43,957 INFO L84 FinitePrefix]: Finished finitePrefix Result has 844 conditions, 286 events. 52/286 cut-off events. For 924/953 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1207 event pairs, 0 based on Foata normal form. 18/276 useless extension candidates. Maximal degree in co-relation 787. Up to 57 conditions per place. [2021-10-13 22:45:43,958 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 33 selfloop transitions, 27 changer transitions 5/111 dead transitions. [2021-10-13 22:45:43,958 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 111 transitions, 964 flow [2021-10-13 22:45:43,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 22:45:43,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-13 22:45:43,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 639 transitions. [2021-10-13 22:45:43,960 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8542780748663101 [2021-10-13 22:45:43,960 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 639 transitions. [2021-10-13 22:45:43,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 639 transitions. [2021-10-13 22:45:43,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:43,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 639 transitions. [2021-10-13 22:45:43,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.09090909090909) internal successors, (639), 11 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:43,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 68.0) internal successors, (816), 12 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:43,976 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 68.0) internal successors, (816), 12 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:43,976 INFO L186 Difference]: Start difference. First operand has 109 places, 98 transitions, 654 flow. Second operand 11 states and 639 transitions. [2021-10-13 22:45:43,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 111 transitions, 964 flow [2021-10-13 22:45:43,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 111 transitions, 831 flow, removed 54 selfloop flow, removed 9 redundant places. [2021-10-13 22:45:43,983 INFO L242 Difference]: Finished difference. Result has 109 places, 99 transitions, 636 flow [2021-10-13 22:45:43,984 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=547, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=636, PETRI_PLACES=109, PETRI_TRANSITIONS=99} [2021-10-13 22:45:43,984 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 41 predicate places. [2021-10-13 22:45:43,984 INFO L470 AbstractCegarLoop]: Abstraction has has 109 places, 99 transitions, 636 flow [2021-10-13 22:45:43,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 56.0) internal successors, (448), 8 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:43,984 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:43,984 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:45:43,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-13 22:45:43,985 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:43,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:43,985 INFO L82 PathProgramCache]: Analyzing trace with hash 531491406, now seen corresponding path program 2 times [2021-10-13 22:45:43,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:43,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383436068] [2021-10-13 22:45:43,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:43,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:44,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:44,128 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 22:45:44,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:44,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383436068] [2021-10-13 22:45:44,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383436068] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 22:45:44,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 22:45:44,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-13 22:45:44,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219752934] [2021-10-13 22:45:44,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 22:45:44,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:44,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 22:45:44,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-13 22:45:44,130 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:44,131 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 99 transitions, 636 flow. Second operand has 8 states, 8 states have (on average 56.0) internal successors, (448), 8 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:44,131 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:44,131 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:44,131 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:44,338 INFO L129 PetriNetUnfolder]: 63/355 cut-off events. [2021-10-13 22:45:44,338 INFO L130 PetriNetUnfolder]: For 1172/1216 co-relation queries the response was YES. [2021-10-13 22:45:44,339 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1045 conditions, 355 events. 63/355 cut-off events. For 1172/1216 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1851 event pairs, 0 based on Foata normal form. 21/341 useless extension candidates. Maximal degree in co-relation 988. Up to 71 conditions per place. [2021-10-13 22:45:44,342 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 22 selfloop transitions, 48 changer transitions 8/124 dead transitions. [2021-10-13 22:45:44,342 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 124 transitions, 1136 flow [2021-10-13 22:45:44,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 22:45:44,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-13 22:45:44,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 871 transitions. [2021-10-13 22:45:44,344 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8539215686274509 [2021-10-13 22:45:44,344 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 871 transitions. [2021-10-13 22:45:44,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 871 transitions. [2021-10-13 22:45:44,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:44,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 871 transitions. [2021-10-13 22:45:44,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 58.06666666666667) internal successors, (871), 15 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:44,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 68.0) internal successors, (1088), 16 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:44,348 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 68.0) internal successors, (1088), 16 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:44,348 INFO L186 Difference]: Start difference. First operand has 109 places, 99 transitions, 636 flow. Second operand 15 states and 871 transitions. [2021-10-13 22:45:44,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 124 transitions, 1136 flow [2021-10-13 22:45:44,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 124 transitions, 1051 flow, removed 17 selfloop flow, removed 10 redundant places. [2021-10-13 22:45:44,363 INFO L242 Difference]: Finished difference. Result has 117 places, 110 transitions, 871 flow [2021-10-13 22:45:44,379 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=577, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=871, PETRI_PLACES=117, PETRI_TRANSITIONS=110} [2021-10-13 22:45:44,379 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 49 predicate places. [2021-10-13 22:45:44,380 INFO L470 AbstractCegarLoop]: Abstraction has has 117 places, 110 transitions, 871 flow [2021-10-13 22:45:44,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 56.0) internal successors, (448), 8 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:44,380 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:44,380 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] [2021-10-13 22:45:44,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-13 22:45:44,380 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:44,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:44,381 INFO L82 PathProgramCache]: Analyzing trace with hash -564451095, now seen corresponding path program 1 times [2021-10-13 22:45:44,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:44,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866073390] [2021-10-13 22:45:44,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:44,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:44,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:44,502 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 22:45:44,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:44,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866073390] [2021-10-13 22:45:44,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866073390] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:44,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209806289] [2021-10-13 22:45:44,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:44,502 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:44,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:45:44,503 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 22:45:44,504 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 22:45:44,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:44,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 22:45:44,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:45:44,844 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 22:45:44,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209806289] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:44,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:45:44,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-13 22:45:44,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072715019] [2021-10-13 22:45:44,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 22:45:44,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:44,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 22:45:44,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-10-13 22:45:44,846 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:44,847 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 110 transitions, 871 flow. Second operand has 13 states, 13 states have (on average 56.15384615384615) internal successors, (730), 13 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:44,847 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:44,847 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:44,847 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:44,973 INFO L129 PetriNetUnfolder]: 72/427 cut-off events. [2021-10-13 22:45:44,973 INFO L130 PetriNetUnfolder]: For 1892/1929 co-relation queries the response was YES. [2021-10-13 22:45:44,975 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1328 conditions, 427 events. 72/427 cut-off events. For 1892/1929 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2429 event pairs, 0 based on Foata normal form. 18/402 useless extension candidates. Maximal degree in co-relation 1268. Up to 80 conditions per place. [2021-10-13 22:45:44,976 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 52 selfloop transitions, 24 changer transitions 16/138 dead transitions. [2021-10-13 22:45:44,976 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 138 transitions, 1474 flow [2021-10-13 22:45:44,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 22:45:44,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-13 22:45:44,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 930 transitions. [2021-10-13 22:45:44,978 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8547794117647058 [2021-10-13 22:45:44,978 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 930 transitions. [2021-10-13 22:45:44,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 930 transitions. [2021-10-13 22:45:44,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:44,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 930 transitions. [2021-10-13 22:45:44,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 58.125) internal successors, (930), 16 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:44,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 68.0) internal successors, (1156), 17 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:44,983 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 68.0) internal successors, (1156), 17 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:44,983 INFO L186 Difference]: Start difference. First operand has 117 places, 110 transitions, 871 flow. Second operand 16 states and 930 transitions. [2021-10-13 22:45:44,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 138 transitions, 1474 flow [2021-10-13 22:45:44,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 138 transitions, 1346 flow, removed 41 selfloop flow, removed 11 redundant places. [2021-10-13 22:45:44,993 INFO L242 Difference]: Finished difference. Result has 128 places, 116 transitions, 936 flow [2021-10-13 22:45:44,993 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=782, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=936, PETRI_PLACES=128, PETRI_TRANSITIONS=116} [2021-10-13 22:45:44,993 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 60 predicate places. [2021-10-13 22:45:44,993 INFO L470 AbstractCegarLoop]: Abstraction has has 128 places, 116 transitions, 936 flow [2021-10-13 22:45:44,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.15384615384615) internal successors, (730), 13 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:44,994 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:44,994 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] [2021-10-13 22:45:45,013 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 22:45:45,210 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,SelfDestructingSolverStorable7 [2021-10-13 22:45:45,210 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:45,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:45,211 INFO L82 PathProgramCache]: Analyzing trace with hash -733450813, now seen corresponding path program 2 times [2021-10-13 22:45:45,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:45,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325665125] [2021-10-13 22:45:45,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:45,211 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:45,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:45,286 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 22:45:45,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:45,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325665125] [2021-10-13 22:45:45,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325665125] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:45,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756881091] [2021-10-13 22:45:45,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:45:45,287 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:45,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:45:45,288 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 22:45:45,288 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 22:45:45,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:45:45,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:45:45,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 22:45:45,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:45:45,656 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 22:45:45,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756881091] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:45,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:45:45,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-13 22:45:45,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116808836] [2021-10-13 22:45:45,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 22:45:45,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:45,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 22:45:45,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-10-13 22:45:45,658 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:45,658 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 116 transitions, 936 flow. Second operand has 13 states, 13 states have (on average 56.15384615384615) internal successors, (730), 13 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:45,658 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:45,658 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:45,658 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:45,801 INFO L129 PetriNetUnfolder]: 76/456 cut-off events. [2021-10-13 22:45:45,801 INFO L130 PetriNetUnfolder]: For 2341/2375 co-relation queries the response was YES. [2021-10-13 22:45:45,803 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1445 conditions, 456 events. 76/456 cut-off events. For 2341/2375 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2697 event pairs, 0 based on Foata normal form. 20/430 useless extension candidates. Maximal degree in co-relation 1378. Up to 84 conditions per place. [2021-10-13 22:45:45,805 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 47 selfloop transitions, 35 changer transitions 16/144 dead transitions. [2021-10-13 22:45:45,805 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 144 transitions, 1594 flow [2021-10-13 22:45:45,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 22:45:45,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-13 22:45:45,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 988 transitions. [2021-10-13 22:45:45,808 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8546712802768166 [2021-10-13 22:45:45,808 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 988 transitions. [2021-10-13 22:45:45,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 988 transitions. [2021-10-13 22:45:45,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:45,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 988 transitions. [2021-10-13 22:45:45,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 58.11764705882353) internal successors, (988), 17 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:45,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 68.0) internal successors, (1224), 18 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:45,813 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 68.0) internal successors, (1224), 18 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:45,813 INFO L186 Difference]: Start difference. First operand has 128 places, 116 transitions, 936 flow. Second operand 17 states and 988 transitions. [2021-10-13 22:45:45,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 144 transitions, 1594 flow [2021-10-13 22:45:45,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 144 transitions, 1522 flow, removed 24 selfloop flow, removed 10 redundant places. [2021-10-13 22:45:45,823 INFO L242 Difference]: Finished difference. Result has 138 places, 122 transitions, 1080 flow [2021-10-13 22:45:45,823 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=881, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1080, PETRI_PLACES=138, PETRI_TRANSITIONS=122} [2021-10-13 22:45:45,824 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 70 predicate places. [2021-10-13 22:45:45,824 INFO L470 AbstractCegarLoop]: Abstraction has has 138 places, 122 transitions, 1080 flow [2021-10-13 22:45:45,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.15384615384615) internal successors, (730), 13 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:45,824 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:45,824 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] [2021-10-13 22:45:45,857 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 22:45:46,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:46,058 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:46,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:46,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1187287973, now seen corresponding path program 3 times [2021-10-13 22:45:46,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:46,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626184153] [2021-10-13 22:45:46,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:46,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:46,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:46,133 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 22:45:46,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:46,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626184153] [2021-10-13 22:45:46,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626184153] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:46,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917989012] [2021-10-13 22:45:46,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:45:46,134 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:46,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:45:46,143 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 22:45:46,160 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 22:45:46,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 22:45:46,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:45:46,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 22:45:46,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:45:46,495 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 22:45:46,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917989012] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:46,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:45:46,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-13 22:45:46,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176893927] [2021-10-13 22:45:46,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 22:45:46,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:46,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 22:45:46,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-10-13 22:45:46,497 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:46,498 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 122 transitions, 1080 flow. Second operand has 13 states, 13 states have (on average 56.15384615384615) internal successors, (730), 13 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:46,498 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:46,498 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:46,498 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:46,700 INFO L129 PetriNetUnfolder]: 84/505 cut-off events. [2021-10-13 22:45:46,701 INFO L130 PetriNetUnfolder]: For 3117/3159 co-relation queries the response was YES. [2021-10-13 22:45:46,702 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1688 conditions, 505 events. 84/505 cut-off events. For 3117/3159 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3147 event pairs, 0 based on Foata normal form. 20/474 useless extension candidates. Maximal degree in co-relation 1616. Up to 92 conditions per place. [2021-10-13 22:45:46,704 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 47 selfloop transitions, 47 changer transitions 16/156 dead transitions. [2021-10-13 22:45:46,704 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 156 transitions, 1897 flow [2021-10-13 22:45:46,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-13 22:45:46,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-13 22:45:46,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1104 transitions. [2021-10-13 22:45:46,706 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8544891640866873 [2021-10-13 22:45:46,706 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1104 transitions. [2021-10-13 22:45:46,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1104 transitions. [2021-10-13 22:45:46,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:46,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1104 transitions. [2021-10-13 22:45:46,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 58.10526315789474) internal successors, (1104), 19 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:46,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 68.0) internal successors, (1360), 20 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:46,709 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 68.0) internal successors, (1360), 20 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:46,709 INFO L186 Difference]: Start difference. First operand has 138 places, 122 transitions, 1080 flow. Second operand 19 states and 1104 transitions. [2021-10-13 22:45:46,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 156 transitions, 1897 flow [2021-10-13 22:45:46,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 156 transitions, 1705 flow, removed 70 selfloop flow, removed 15 redundant places. [2021-10-13 22:45:46,719 INFO L242 Difference]: Finished difference. Result has 147 places, 134 transitions, 1289 flow [2021-10-13 22:45:46,719 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=985, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1289, PETRI_PLACES=147, PETRI_TRANSITIONS=134} [2021-10-13 22:45:46,719 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 79 predicate places. [2021-10-13 22:45:46,719 INFO L470 AbstractCegarLoop]: Abstraction has has 147 places, 134 transitions, 1289 flow [2021-10-13 22:45:46,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.15384615384615) internal successors, (730), 13 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:46,720 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:46,720 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, 1, 1] [2021-10-13 22:45:46,738 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 22:45:46,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:46,936 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:46,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:46,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1375022313, now seen corresponding path program 1 times [2021-10-13 22:45:46,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:46,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71662816] [2021-10-13 22:45:46,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:46,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:46,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:47,011 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 22:45:47,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:47,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71662816] [2021-10-13 22:45:47,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71662816] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:47,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994582674] [2021-10-13 22:45:47,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:47,011 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:47,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:45:47,026 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 22:45:47,027 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 22:45:47,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:47,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 22:45:47,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:45:47,460 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 22:45:47,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994582674] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:47,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:45:47,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-10-13 22:45:47,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057019999] [2021-10-13 22:45:47,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 22:45:47,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:47,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 22:45:47,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-10-13 22:45:47,462 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:47,463 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 134 transitions, 1289 flow. Second operand has 15 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 22:45:47,463 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:47,463 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:47,463 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:47,584 INFO L129 PetriNetUnfolder]: 78/482 cut-off events. [2021-10-13 22:45:47,584 INFO L130 PetriNetUnfolder]: For 2497/2538 co-relation queries the response was YES. [2021-10-13 22:45:47,586 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1613 conditions, 482 events. 78/482 cut-off events. For 2497/2538 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2982 event pairs, 0 based on Foata normal form. 18/451 useless extension candidates. Maximal degree in co-relation 1538. Up to 89 conditions per place. [2021-10-13 22:45:47,589 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 56 selfloop transitions, 42 changer transitions 5/149 dead transitions. [2021-10-13 22:45:47,589 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 149 transitions, 1766 flow [2021-10-13 22:45:47,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 22:45:47,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-13 22:45:47,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 810 transitions. [2021-10-13 22:45:47,590 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8508403361344538 [2021-10-13 22:45:47,590 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 810 transitions. [2021-10-13 22:45:47,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 810 transitions. [2021-10-13 22:45:47,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:47,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 810 transitions. [2021-10-13 22:45:47,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 57.857142857142854) internal successors, (810), 14 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:47,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 68.0) internal successors, (1020), 15 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:47,592 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 68.0) internal successors, (1020), 15 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:47,593 INFO L186 Difference]: Start difference. First operand has 147 places, 134 transitions, 1289 flow. Second operand 14 states and 810 transitions. [2021-10-13 22:45:47,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 149 transitions, 1766 flow [2021-10-13 22:45:47,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 149 transitions, 1608 flow, removed 55 selfloop flow, removed 14 redundant places. [2021-10-13 22:45:47,602 INFO L242 Difference]: Finished difference. Result has 144 places, 136 transitions, 1312 flow [2021-10-13 22:45:47,602 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=1165, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1312, PETRI_PLACES=144, PETRI_TRANSITIONS=136} [2021-10-13 22:45:47,602 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 76 predicate places. [2021-10-13 22:45:47,602 INFO L470 AbstractCegarLoop]: Abstraction has has 144 places, 136 transitions, 1312 flow [2021-10-13 22:45:47,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 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 22:45:47,602 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:47,603 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, 1, 1] [2021-10-13 22:45:47,628 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 22:45:47,819 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,SelfDestructingSolverStorable10 [2021-10-13 22:45:47,819 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:47,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:47,819 INFO L82 PathProgramCache]: Analyzing trace with hash -403660899, now seen corresponding path program 2 times [2021-10-13 22:45:47,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:47,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250538046] [2021-10-13 22:45:47,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:47,819 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:47,903 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 22:45:47,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:47,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250538046] [2021-10-13 22:45:47,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250538046] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:47,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369194226] [2021-10-13 22:45:47,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:45:47,903 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:47,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:45:47,919 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 22:45:47,924 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 22:45:48,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:45:48,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:45:48,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 22:45:48,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:45:48,429 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 22:45:48,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369194226] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:48,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:45:48,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-10-13 22:45:48,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010375612] [2021-10-13 22:45:48,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 22:45:48,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:48,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 22:45:48,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-10-13 22:45:48,431 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:48,432 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 136 transitions, 1312 flow. Second operand has 15 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 22:45:48,432 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:48,432 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:48,432 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:48,552 INFO L129 PetriNetUnfolder]: 79/484 cut-off events. [2021-10-13 22:45:48,552 INFO L130 PetriNetUnfolder]: For 2340/2383 co-relation queries the response was YES. [2021-10-13 22:45:48,553 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1618 conditions, 484 events. 79/484 cut-off events. For 2340/2383 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2995 event pairs, 0 based on Foata normal form. 18/453 useless extension candidates. Maximal degree in co-relation 1547. Up to 91 conditions per place. [2021-10-13 22:45:48,555 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 49 selfloop transitions, 50 changer transitions 5/150 dead transitions. [2021-10-13 22:45:48,555 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 150 transitions, 1766 flow [2021-10-13 22:45:48,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 22:45:48,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-13 22:45:48,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 868 transitions. [2021-10-13 22:45:48,557 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8509803921568627 [2021-10-13 22:45:48,557 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 868 transitions. [2021-10-13 22:45:48,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 868 transitions. [2021-10-13 22:45:48,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:48,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 868 transitions. [2021-10-13 22:45:48,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 57.86666666666667) internal successors, (868), 15 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:48,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 68.0) internal successors, (1088), 16 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:48,560 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 68.0) internal successors, (1088), 16 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:48,560 INFO L186 Difference]: Start difference. First operand has 144 places, 136 transitions, 1312 flow. Second operand 15 states and 868 transitions. [2021-10-13 22:45:48,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 150 transitions, 1766 flow [2021-10-13 22:45:48,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 150 transitions, 1670 flow, removed 13 selfloop flow, removed 11 redundant places. [2021-10-13 22:45:48,570 INFO L242 Difference]: Finished difference. Result has 148 places, 137 transitions, 1377 flow [2021-10-13 22:45:48,571 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=1226, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1377, PETRI_PLACES=148, PETRI_TRANSITIONS=137} [2021-10-13 22:45:48,571 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 80 predicate places. [2021-10-13 22:45:48,571 INFO L470 AbstractCegarLoop]: Abstraction has has 148 places, 137 transitions, 1377 flow [2021-10-13 22:45:48,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 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 22:45:48,572 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:48,572 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, 1, 1] [2021-10-13 22:45:48,605 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 22:45:48,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:48,788 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:48,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:48,788 INFO L82 PathProgramCache]: Analyzing trace with hash 177794743, now seen corresponding path program 3 times [2021-10-13 22:45:48,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:48,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181059452] [2021-10-13 22:45:48,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:48,788 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:48,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:48,867 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 22:45:48,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:48,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181059452] [2021-10-13 22:45:48,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181059452] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:48,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850847106] [2021-10-13 22:45:48,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:45:48,867 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:48,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:45:48,881 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 22:45:48,882 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 22:45:49,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 22:45:49,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:45:49,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 22:45:49,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:45:49,388 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 22:45:49,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850847106] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:49,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:45:49,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-10-13 22:45:49,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460528416] [2021-10-13 22:45:49,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 22:45:49,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:49,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 22:45:49,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-10-13 22:45:49,390 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:49,391 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 137 transitions, 1377 flow. Second operand has 15 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 22:45:49,391 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:49,391 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:49,391 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:49,736 INFO L129 PetriNetUnfolder]: 106/644 cut-off events. [2021-10-13 22:45:49,736 INFO L130 PetriNetUnfolder]: For 4367/4423 co-relation queries the response was YES. [2021-10-13 22:45:49,738 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2307 conditions, 644 events. 106/644 cut-off events. For 4367/4423 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4427 event pairs, 0 based on Foata normal form. 28/608 useless extension candidates. Maximal degree in co-relation 2235. Up to 133 conditions per place. [2021-10-13 22:45:49,741 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 19 selfloop transitions, 103 changer transitions 17/185 dead transitions. [2021-10-13 22:45:49,741 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 185 transitions, 2656 flow [2021-10-13 22:45:49,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-13 22:45:49,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-10-13 22:45:49,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1564 transitions. [2021-10-13 22:45:49,743 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8518518518518519 [2021-10-13 22:45:49,743 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1564 transitions. [2021-10-13 22:45:49,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1564 transitions. [2021-10-13 22:45:49,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:49,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1564 transitions. [2021-10-13 22:45:49,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 57.925925925925924) internal successors, (1564), 27 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:49,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 68.0) internal successors, (1904), 28 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:49,748 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 68.0) internal successors, (1904), 28 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:49,748 INFO L186 Difference]: Start difference. First operand has 148 places, 137 transitions, 1377 flow. Second operand 27 states and 1564 transitions. [2021-10-13 22:45:49,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 185 transitions, 2656 flow [2021-10-13 22:45:49,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 185 transitions, 2485 flow, removed 42 selfloop flow, removed 13 redundant places. [2021-10-13 22:45:49,760 INFO L242 Difference]: Finished difference. Result has 172 places, 164 transitions, 2107 flow [2021-10-13 22:45:49,761 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=1286, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2107, PETRI_PLACES=172, PETRI_TRANSITIONS=164} [2021-10-13 22:45:49,761 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 104 predicate places. [2021-10-13 22:45:49,761 INFO L470 AbstractCegarLoop]: Abstraction has has 172 places, 164 transitions, 2107 flow [2021-10-13 22:45:49,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 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 22:45:49,761 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:49,761 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, 1, 1] [2021-10-13 22:45:49,779 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 22:45:49,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:49,977 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:49,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:49,978 INFO L82 PathProgramCache]: Analyzing trace with hash 19002539, now seen corresponding path program 1 times [2021-10-13 22:45:49,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:49,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97693275] [2021-10-13 22:45:49,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:49,978 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:49,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:50,060 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 22:45:50,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:50,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97693275] [2021-10-13 22:45:50,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97693275] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:50,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461924625] [2021-10-13 22:45:50,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:50,060 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:50,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:45:50,076 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 22:45:50,077 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 22:45:50,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:50,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 22:45:50,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:45:50,697 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 22:45:50,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461924625] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:50,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:45:50,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-10-13 22:45:50,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488791076] [2021-10-13 22:45:50,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 22:45:50,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:50,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 22:45:50,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-10-13 22:45:50,699 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:50,700 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 164 transitions, 2107 flow. Second operand has 15 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 22:45:50,700 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:50,700 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:50,700 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:51,078 INFO L129 PetriNetUnfolder]: 128/803 cut-off events. [2021-10-13 22:45:51,078 INFO L130 PetriNetUnfolder]: For 7013/7089 co-relation queries the response was YES. [2021-10-13 22:45:51,081 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3055 conditions, 803 events. 128/803 cut-off events. For 7013/7089 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 5980 event pairs, 0 based on Foata normal form. 36/757 useless extension candidates. Maximal degree in co-relation 2972. Up to 167 conditions per place. [2021-10-13 22:45:51,084 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 52 selfloop transitions, 115 changer transitions 17/230 dead transitions. [2021-10-13 22:45:51,085 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 230 transitions, 3852 flow [2021-10-13 22:45:51,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 22:45:51,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-13 22:45:51,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1392 transitions. [2021-10-13 22:45:51,086 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8529411764705882 [2021-10-13 22:45:51,086 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1392 transitions. [2021-10-13 22:45:51,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1392 transitions. [2021-10-13 22:45:51,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:51,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1392 transitions. [2021-10-13 22:45:51,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 58.0) internal successors, (1392), 24 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:51,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 68.0) internal successors, (1700), 25 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:51,090 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 68.0) internal successors, (1700), 25 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:51,090 INFO L186 Difference]: Start difference. First operand has 172 places, 164 transitions, 2107 flow. Second operand 24 states and 1392 transitions. [2021-10-13 22:45:51,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 230 transitions, 3852 flow [2021-10-13 22:45:51,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 230 transitions, 3266 flow, removed 266 selfloop flow, removed 17 redundant places. [2021-10-13 22:45:51,110 INFO L242 Difference]: Finished difference. Result has 185 places, 202 transitions, 2754 flow [2021-10-13 22:45:51,110 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=1797, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2754, PETRI_PLACES=185, PETRI_TRANSITIONS=202} [2021-10-13 22:45:51,110 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 117 predicate places. [2021-10-13 22:45:51,110 INFO L470 AbstractCegarLoop]: Abstraction has has 185 places, 202 transitions, 2754 flow [2021-10-13 22:45:51,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 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 22:45:51,111 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:51,111 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-10-13 22:45:51,130 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 22:45:51,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-13 22:45:51,328 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:51,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:51,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1186572119, now seen corresponding path program 2 times [2021-10-13 22:45:51,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:51,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422752470] [2021-10-13 22:45:51,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:51,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:51,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:51,412 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:45:51,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:51,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422752470] [2021-10-13 22:45:51,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422752470] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:51,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834883916] [2021-10-13 22:45:51,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:45:51,413 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:51,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:45:51,413 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 22:45:51,414 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 22:45:51,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:45:51,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:45:51,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 22:45:51,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:45:51,936 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:45:51,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834883916] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:51,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:45:51,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-10-13 22:45:51,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729649655] [2021-10-13 22:45:51,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 22:45:51,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:51,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 22:45:51,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-10-13 22:45:51,938 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:51,939 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 202 transitions, 2754 flow. Second operand has 17 states, 17 states have (on average 56.11764705882353) internal successors, (954), 17 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:51,939 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:51,939 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:51,939 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:52,220 INFO L129 PetriNetUnfolder]: 139/902 cut-off events. [2021-10-13 22:45:52,221 INFO L130 PetriNetUnfolder]: For 6579/6653 co-relation queries the response was YES. [2021-10-13 22:45:52,225 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3266 conditions, 902 events. 139/902 cut-off events. For 6579/6653 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 6750 event pairs, 0 based on Foata normal form. 26/835 useless extension candidates. Maximal degree in co-relation 3175. Up to 179 conditions per place. [2021-10-13 22:45:52,228 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 111 selfloop transitions, 72 changer transitions 11/240 dead transitions. [2021-10-13 22:45:52,228 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 240 transitions, 4006 flow [2021-10-13 22:45:52,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 22:45:52,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-13 22:45:52,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1160 transitions. [2021-10-13 22:45:52,231 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8529411764705882 [2021-10-13 22:45:52,231 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1160 transitions. [2021-10-13 22:45:52,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1160 transitions. [2021-10-13 22:45:52,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:52,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1160 transitions. [2021-10-13 22:45:52,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 58.0) internal successors, (1160), 20 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:52,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 68.0) internal successors, (1428), 21 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:52,244 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 68.0) internal successors, (1428), 21 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:52,244 INFO L186 Difference]: Start difference. First operand has 185 places, 202 transitions, 2754 flow. Second operand 20 states and 1160 transitions. [2021-10-13 22:45:52,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 240 transitions, 4006 flow [2021-10-13 22:45:52,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 240 transitions, 3707 flow, removed 118 selfloop flow, removed 17 redundant places. [2021-10-13 22:45:52,269 INFO L242 Difference]: Finished difference. Result has 190 places, 226 transitions, 3141 flow [2021-10-13 22:45:52,269 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=2489, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3141, PETRI_PLACES=190, PETRI_TRANSITIONS=226} [2021-10-13 22:45:52,269 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 122 predicate places. [2021-10-13 22:45:52,269 INFO L470 AbstractCegarLoop]: Abstraction has has 190 places, 226 transitions, 3141 flow [2021-10-13 22:45:52,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.11764705882353) internal successors, (954), 17 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:52,270 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:52,270 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1] [2021-10-13 22:45:52,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-13 22:45:52,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-13 22:45:52,487 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:52,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:52,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1048523948, now seen corresponding path program 4 times [2021-10-13 22:45:52,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:52,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884571216] [2021-10-13 22:45:52,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:52,488 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:52,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:45:52,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:52,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884571216] [2021-10-13 22:45:52,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884571216] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:52,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848949030] [2021-10-13 22:45:52,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:45:52,578 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:52,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:45:52,590 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 22:45:52,591 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 22:45:52,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:45:52,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:45:52,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 22:45:52,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:45:53,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:45:53,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848949030] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:53,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:45:53,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-10-13 22:45:53,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38081993] [2021-10-13 22:45:53,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 22:45:53,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:53,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 22:45:53,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-10-13 22:45:53,276 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:53,276 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 226 transitions, 3141 flow. Second operand has 17 states, 17 states have (on average 56.11764705882353) internal successors, (954), 17 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:53,276 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:53,276 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:53,276 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:53,527 INFO L129 PetriNetUnfolder]: 136/891 cut-off events. [2021-10-13 22:45:53,527 INFO L130 PetriNetUnfolder]: For 5706/5779 co-relation queries the response was YES. [2021-10-13 22:45:53,531 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3198 conditions, 891 events. 136/891 cut-off events. For 5706/5779 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 6689 event pairs, 0 based on Foata normal form. 24/823 useless extension candidates. Maximal degree in co-relation 3105. Up to 180 conditions per place. [2021-10-13 22:45:53,535 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 143 selfloop transitions, 55 changer transitions 5/249 dead transitions. [2021-10-13 22:45:53,536 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 249 transitions, 3986 flow [2021-10-13 22:45:53,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 22:45:53,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-13 22:45:53,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 867 transitions. [2021-10-13 22:45:53,539 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.85 [2021-10-13 22:45:53,539 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 867 transitions. [2021-10-13 22:45:53,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 867 transitions. [2021-10-13 22:45:53,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:53,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 867 transitions. [2021-10-13 22:45:53,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 57.8) internal successors, (867), 15 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:53,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 68.0) internal successors, (1088), 16 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:53,542 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 68.0) internal successors, (1088), 16 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:53,542 INFO L186 Difference]: Start difference. First operand has 190 places, 226 transitions, 3141 flow. Second operand 15 states and 867 transitions. [2021-10-13 22:45:53,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 249 transitions, 3986 flow [2021-10-13 22:45:53,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 249 transitions, 3760 flow, removed 82 selfloop flow, removed 13 redundant places. [2021-10-13 22:45:53,571 INFO L242 Difference]: Finished difference. Result has 191 places, 228 transitions, 3113 flow [2021-10-13 22:45:53,571 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=2924, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3113, PETRI_PLACES=191, PETRI_TRANSITIONS=228} [2021-10-13 22:45:53,572 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 123 predicate places. [2021-10-13 22:45:53,572 INFO L470 AbstractCegarLoop]: Abstraction has has 191 places, 228 transitions, 3113 flow [2021-10-13 22:45:53,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.11764705882353) internal successors, (954), 17 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:53,572 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:53,572 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1] [2021-10-13 22:45:53,603 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 22:45:53,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-13 22:45:53,785 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:53,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:53,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1800084488, now seen corresponding path program 5 times [2021-10-13 22:45:53,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:53,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014125607] [2021-10-13 22:45:53,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:53,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:53,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:53,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:45:53,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:53,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014125607] [2021-10-13 22:45:53,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014125607] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:53,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114097148] [2021-10-13 22:45:53,894 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:45:53,894 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:53,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:45:53,895 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 22:45:53,897 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 22:45:54,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 22:45:54,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:45:54,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 22:45:54,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:45:54,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:45:54,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114097148] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:54,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:45:54,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-10-13 22:45:54,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031758653] [2021-10-13 22:45:54,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 22:45:54,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:54,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 22:45:54,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-10-13 22:45:54,558 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:54,559 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 228 transitions, 3113 flow. Second operand has 17 states, 17 states have (on average 56.11764705882353) internal successors, (954), 17 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:54,559 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:54,559 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:54,559 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:54,758 INFO L129 PetriNetUnfolder]: 137/893 cut-off events. [2021-10-13 22:45:54,758 INFO L130 PetriNetUnfolder]: For 6041/6116 co-relation queries the response was YES. [2021-10-13 22:45:54,761 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3231 conditions, 893 events. 137/893 cut-off events. For 6041/6116 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 6719 event pairs, 0 based on Foata normal form. 24/825 useless extension candidates. Maximal degree in co-relation 3137. Up to 169 conditions per place. [2021-10-13 22:45:54,765 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 130 selfloop transitions, 69 changer transitions 5/250 dead transitions. [2021-10-13 22:45:54,765 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 250 transitions, 3957 flow [2021-10-13 22:45:54,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 22:45:54,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-13 22:45:54,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 925 transitions. [2021-10-13 22:45:54,771 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8501838235294118 [2021-10-13 22:45:54,771 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 925 transitions. [2021-10-13 22:45:54,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 925 transitions. [2021-10-13 22:45:54,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:54,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 925 transitions. [2021-10-13 22:45:54,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 57.8125) internal successors, (925), 16 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:54,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 68.0) internal successors, (1156), 17 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:54,777 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 68.0) internal successors, (1156), 17 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:54,777 INFO L186 Difference]: Start difference. First operand has 191 places, 228 transitions, 3113 flow. Second operand 16 states and 925 transitions. [2021-10-13 22:45:54,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 250 transitions, 3957 flow [2021-10-13 22:45:54,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 250 transitions, 3863 flow, removed 9 selfloop flow, removed 11 redundant places. [2021-10-13 22:45:54,803 INFO L242 Difference]: Finished difference. Result has 196 places, 229 transitions, 3236 flow [2021-10-13 22:45:54,803 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=3029, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3236, PETRI_PLACES=196, PETRI_TRANSITIONS=229} [2021-10-13 22:45:54,803 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 128 predicate places. [2021-10-13 22:45:54,804 INFO L470 AbstractCegarLoop]: Abstraction has has 196 places, 229 transitions, 3236 flow [2021-10-13 22:45:54,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.11764705882353) internal successors, (954), 17 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:54,804 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:54,804 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1] [2021-10-13 22:45:54,835 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 22:45:55,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-13 22:45:55,036 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:55,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:55,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1055046674, now seen corresponding path program 6 times [2021-10-13 22:45:55,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:55,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016480529] [2021-10-13 22:45:55,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:55,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:55,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:55,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:45:55,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:55,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016480529] [2021-10-13 22:45:55,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016480529] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:55,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321534827] [2021-10-13 22:45:55,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:45:55,125 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:55,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:45:55,126 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 22:45:55,127 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 22:45:55,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 22:45:55,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:45:55,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 22:45:55,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:45:55,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:45:55,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321534827] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:55,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:45:55,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-10-13 22:45:55,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105717385] [2021-10-13 22:45:55,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 22:45:55,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:55,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 22:45:55,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-10-13 22:45:55,709 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:55,709 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 229 transitions, 3236 flow. Second operand has 17 states, 17 states have (on average 56.11764705882353) internal successors, (954), 17 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:55,709 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:55,709 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:55,709 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:56,141 INFO L129 PetriNetUnfolder]: 160/1017 cut-off events. [2021-10-13 22:45:56,141 INFO L130 PetriNetUnfolder]: For 9800/9882 co-relation queries the response was YES. [2021-10-13 22:45:56,147 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3971 conditions, 1017 events. 160/1017 cut-off events. For 9800/9882 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 7905 event pairs, 0 based on Foata normal form. 46/960 useless extension candidates. Maximal degree in co-relation 3876. Up to 183 conditions per place. [2021-10-13 22:45:56,152 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 50 selfloop transitions, 160 changer transitions 17/273 dead transitions. [2021-10-13 22:45:56,152 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 273 transitions, 4962 flow [2021-10-13 22:45:56,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 22:45:56,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-10-13 22:45:56,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1679 transitions. [2021-10-13 22:45:56,154 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8514198782961461 [2021-10-13 22:45:56,154 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1679 transitions. [2021-10-13 22:45:56,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1679 transitions. [2021-10-13 22:45:56,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:56,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1679 transitions. [2021-10-13 22:45:56,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 57.89655172413793) internal successors, (1679), 29 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:56,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 68.0) internal successors, (2040), 30 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:56,158 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 68.0) internal successors, (2040), 30 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:56,158 INFO L186 Difference]: Start difference. First operand has 196 places, 229 transitions, 3236 flow. Second operand 29 states and 1679 transitions. [2021-10-13 22:45:56,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 273 transitions, 4962 flow [2021-10-13 22:45:56,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 273 transitions, 4780 flow, removed 42 selfloop flow, removed 13 redundant places. [2021-10-13 22:45:56,195 INFO L242 Difference]: Finished difference. Result has 222 places, 251 transitions, 4169 flow [2021-10-13 22:45:56,195 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=3130, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=4169, PETRI_PLACES=222, PETRI_TRANSITIONS=251} [2021-10-13 22:45:56,195 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 154 predicate places. [2021-10-13 22:45:56,195 INFO L470 AbstractCegarLoop]: Abstraction has has 222 places, 251 transitions, 4169 flow [2021-10-13 22:45:56,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.11764705882353) internal successors, (954), 17 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:56,196 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:56,196 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1] [2021-10-13 22:45:56,215 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 22:45:56,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-13 22:45:56,419 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:56,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:56,420 INFO L82 PathProgramCache]: Analyzing trace with hash -305927634, now seen corresponding path program 7 times [2021-10-13 22:45:56,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:56,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574332655] [2021-10-13 22:45:56,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:56,420 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:56,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:56,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:45:56,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:56,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574332655] [2021-10-13 22:45:56,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574332655] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:56,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681204997] [2021-10-13 22:45:56,516 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:45:56,516 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:56,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:45:56,517 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 22:45:56,557 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 22:45:56,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:56,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 22:45:56,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:45:57,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:45:57,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681204997] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:57,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:45:57,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-10-13 22:45:57,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340986264] [2021-10-13 22:45:57,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 22:45:57,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:57,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 22:45:57,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-10-13 22:45:57,215 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:57,216 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 251 transitions, 4169 flow. Second operand has 16 states, 16 states have (on average 56.125) internal successors, (898), 16 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:57,216 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:57,216 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:57,216 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:57,724 INFO L129 PetriNetUnfolder]: 190/1270 cut-off events. [2021-10-13 22:45:57,724 INFO L130 PetriNetUnfolder]: For 11857/11941 co-relation queries the response was YES. [2021-10-13 22:45:57,731 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4976 conditions, 1270 events. 190/1270 cut-off events. For 11857/11941 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 10679 event pairs, 0 based on Foata normal form. 46/1184 useless extension candidates. Maximal degree in co-relation 4870. Up to 235 conditions per place. [2021-10-13 22:45:57,736 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 93 selfloop transitions, 172 changer transitions 11/322 dead transitions. [2021-10-13 22:45:57,736 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 322 transitions, 6273 flow [2021-10-13 22:45:57,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 22:45:57,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-13 22:45:57,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1620 transitions. [2021-10-13 22:45:57,738 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8508403361344538 [2021-10-13 22:45:57,738 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1620 transitions. [2021-10-13 22:45:57,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1620 transitions. [2021-10-13 22:45:57,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:57,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1620 transitions. [2021-10-13 22:45:57,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 57.857142857142854) internal successors, (1620), 28 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:57,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 68.0) internal successors, (1972), 29 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:57,742 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 68.0) internal successors, (1972), 29 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:57,742 INFO L186 Difference]: Start difference. First operand has 222 places, 251 transitions, 4169 flow. Second operand 28 states and 1620 transitions. [2021-10-13 22:45:57,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 322 transitions, 6273 flow [2021-10-13 22:45:57,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 322 transitions, 5862 flow, removed 151 selfloop flow, removed 22 redundant places. [2021-10-13 22:45:57,790 INFO L242 Difference]: Finished difference. Result has 234 places, 303 transitions, 5335 flow [2021-10-13 22:45:57,790 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=3796, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=5335, PETRI_PLACES=234, PETRI_TRANSITIONS=303} [2021-10-13 22:45:57,790 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 166 predicate places. [2021-10-13 22:45:57,790 INFO L470 AbstractCegarLoop]: Abstraction has has 234 places, 303 transitions, 5335 flow [2021-10-13 22:45:57,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 56.125) internal successors, (898), 16 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:57,791 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:57,791 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:45:57,824 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 22:45:58,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:58,024 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:58,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:58,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1826935112, now seen corresponding path program 1 times [2021-10-13 22:45:58,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:58,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966025528] [2021-10-13 22:45:58,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:58,025 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:58,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:58,118 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 22:45:58,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:58,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966025528] [2021-10-13 22:45:58,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966025528] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:58,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509914166] [2021-10-13 22:45:58,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:58,119 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:58,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:45:58,125 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 22:45:58,126 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 22:45:58,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:58,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 22:45:58,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:45:58,771 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 22:45:58,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509914166] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:58,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:45:58,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-10-13 22:45:58,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081304635] [2021-10-13 22:45:58,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 22:45:58,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:58,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 22:45:58,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-10-13 22:45:58,773 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:58,773 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 303 transitions, 5335 flow. Second operand has 16 states, 16 states have (on average 56.125) internal successors, (898), 16 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:58,773 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:58,773 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:58,773 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:59,160 INFO L129 PetriNetUnfolder]: 197/1327 cut-off events. [2021-10-13 22:45:59,161 INFO L130 PetriNetUnfolder]: For 12259/12380 co-relation queries the response was YES. [2021-10-13 22:45:59,169 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5331 conditions, 1327 events. 197/1327 cut-off events. For 12259/12380 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 11410 event pairs, 0 based on Foata normal form. 32/1221 useless extension candidates. Maximal degree in co-relation 5219. Up to 266 conditions per place. [2021-10-13 22:45:59,176 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 214 selfloop transitions, 78 changer transitions 10/348 dead transitions. [2021-10-13 22:45:59,176 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 348 transitions, 6889 flow [2021-10-13 22:45:59,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-13 22:45:59,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-13 22:45:59,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1212 transitions. [2021-10-13 22:45:59,178 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8487394957983193 [2021-10-13 22:45:59,178 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1212 transitions. [2021-10-13 22:45:59,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1212 transitions. [2021-10-13 22:45:59,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:59,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1212 transitions. [2021-10-13 22:45:59,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 57.714285714285715) internal successors, (1212), 21 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:59,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 68.0) internal successors, (1496), 22 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 22:45:59,180 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 68.0) internal successors, (1496), 22 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 22:45:59,180 INFO L186 Difference]: Start difference. First operand has 234 places, 303 transitions, 5335 flow. Second operand 21 states and 1212 transitions. [2021-10-13 22:45:59,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 348 transitions, 6889 flow [2021-10-13 22:45:59,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 348 transitions, 6397 flow, removed 194 selfloop flow, removed 16 redundant places. [2021-10-13 22:45:59,242 INFO L242 Difference]: Finished difference. Result has 244 places, 318 transitions, 5421 flow [2021-10-13 22:45:59,243 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=4885, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5421, PETRI_PLACES=244, PETRI_TRANSITIONS=318} [2021-10-13 22:45:59,243 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 176 predicate places. [2021-10-13 22:45:59,243 INFO L470 AbstractCegarLoop]: Abstraction has has 244 places, 318 transitions, 5421 flow [2021-10-13 22:45:59,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 56.125) internal successors, (898), 16 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:59,243 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:59,244 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:45:59,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-10-13 22:45:59,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:59,470 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:59,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:59,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1476259550, now seen corresponding path program 2 times [2021-10-13 22:45:59,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:59,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308986957] [2021-10-13 22:45:59,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:59,471 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:59,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:59,542 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 22:45:59,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:59,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308986957] [2021-10-13 22:45:59,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308986957] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:59,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661288875] [2021-10-13 22:45:59,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:45:59,543 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:59,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:45:59,557 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 22:45:59,558 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 22:46:00,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:46:00,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:00,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 22:46:00,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:00,292 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 22:46:00,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661288875] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:00,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:00,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-10-13 22:46:00,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313812864] [2021-10-13 22:46:00,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 22:46:00,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:00,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 22:46:00,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-10-13 22:46:00,293 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:00,294 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 318 transitions, 5421 flow. Second operand has 16 states, 16 states have (on average 56.125) internal successors, (898), 16 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:00,294 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:00,294 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:00,294 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:00,705 INFO L129 PetriNetUnfolder]: 207/1410 cut-off events. [2021-10-13 22:46:00,706 INFO L130 PetriNetUnfolder]: For 12758/12874 co-relation queries the response was YES. [2021-10-13 22:46:00,714 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5558 conditions, 1410 events. 207/1410 cut-off events. For 12758/12874 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 12497 event pairs, 0 based on Foata normal form. 40/1303 useless extension candidates. Maximal degree in co-relation 5440. Up to 232 conditions per place. [2021-10-13 22:46:00,725 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 163 selfloop transitions, 143 changer transitions 10/362 dead transitions. [2021-10-13 22:46:00,725 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 362 transitions, 7008 flow [2021-10-13 22:46:00,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 22:46:00,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-10-13 22:46:00,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1672 transitions. [2021-10-13 22:46:00,727 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.847870182555781 [2021-10-13 22:46:00,727 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1672 transitions. [2021-10-13 22:46:00,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1672 transitions. [2021-10-13 22:46:00,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:00,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1672 transitions. [2021-10-13 22:46:00,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 57.6551724137931) internal successors, (1672), 29 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:00,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 68.0) internal successors, (2040), 30 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:00,731 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 68.0) internal successors, (2040), 30 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:00,731 INFO L186 Difference]: Start difference. First operand has 244 places, 318 transitions, 5421 flow. Second operand 29 states and 1672 transitions. [2021-10-13 22:46:00,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 362 transitions, 7008 flow [2021-10-13 22:46:00,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 362 transitions, 6885 flow, removed 27 selfloop flow, removed 12 redundant places. [2021-10-13 22:46:00,789 INFO L242 Difference]: Finished difference. Result has 264 places, 333 transitions, 6031 flow [2021-10-13 22:46:00,789 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=5322, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=6031, PETRI_PLACES=264, PETRI_TRANSITIONS=333} [2021-10-13 22:46:00,789 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 196 predicate places. [2021-10-13 22:46:00,789 INFO L470 AbstractCegarLoop]: Abstraction has has 264 places, 333 transitions, 6031 flow [2021-10-13 22:46:00,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 56.125) internal successors, (898), 16 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:00,790 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:00,790 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:46:00,806 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 22:46:01,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:01,007 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:01,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:01,007 INFO L82 PathProgramCache]: Analyzing trace with hash 254442478, now seen corresponding path program 3 times [2021-10-13 22:46:01,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:01,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553990033] [2021-10-13 22:46:01,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:01,008 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:01,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:01,115 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 22:46:01,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:01,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553990033] [2021-10-13 22:46:01,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553990033] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:01,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65377668] [2021-10-13 22:46:01,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:46:01,116 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:01,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:01,117 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 22:46:01,118 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 22:46:01,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 22:46:01,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:01,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 22:46:01,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:01,785 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 22:46:01,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65377668] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:01,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:01,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-10-13 22:46:01,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773196139] [2021-10-13 22:46:01,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 22:46:01,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:01,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 22:46:01,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-10-13 22:46:01,787 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:01,788 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 333 transitions, 6031 flow. Second operand has 16 states, 16 states have (on average 56.125) internal successors, (898), 16 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:01,788 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:01,788 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:01,788 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:02,236 INFO L129 PetriNetUnfolder]: 221/1493 cut-off events. [2021-10-13 22:46:02,237 INFO L130 PetriNetUnfolder]: For 15143/15273 co-relation queries the response was YES. [2021-10-13 22:46:02,247 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6092 conditions, 1493 events. 221/1493 cut-off events. For 15143/15273 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 13534 event pairs, 0 based on Foata normal form. 64/1402 useless extension candidates. Maximal degree in co-relation 5969. Up to 213 conditions per place. [2021-10-13 22:46:02,252 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 113 selfloop transitions, 210 changer transitions 10/379 dead transitions. [2021-10-13 22:46:02,252 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 379 transitions, 7736 flow [2021-10-13 22:46:02,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 22:46:02,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-13 22:46:02,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1618 transitions. [2021-10-13 22:46:02,254 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8497899159663865 [2021-10-13 22:46:02,254 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1618 transitions. [2021-10-13 22:46:02,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1618 transitions. [2021-10-13 22:46:02,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:02,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1618 transitions. [2021-10-13 22:46:02,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 57.785714285714285) internal successors, (1618), 28 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:02,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 68.0) internal successors, (1972), 29 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:02,258 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 68.0) internal successors, (1972), 29 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:02,258 INFO L186 Difference]: Start difference. First operand has 264 places, 333 transitions, 6031 flow. Second operand 28 states and 1618 transitions. [2021-10-13 22:46:02,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 379 transitions, 7736 flow [2021-10-13 22:46:02,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 379 transitions, 7440 flow, removed 66 selfloop flow, removed 22 redundant places. [2021-10-13 22:46:02,328 INFO L242 Difference]: Finished difference. Result has 273 places, 352 transitions, 6758 flow [2021-10-13 22:46:02,328 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=5792, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=6758, PETRI_PLACES=273, PETRI_TRANSITIONS=352} [2021-10-13 22:46:02,328 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 205 predicate places. [2021-10-13 22:46:02,328 INFO L470 AbstractCegarLoop]: Abstraction has has 273 places, 352 transitions, 6758 flow [2021-10-13 22:46:02,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 56.125) internal successors, (898), 16 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:02,329 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:02,329 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:46:02,345 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 22:46:02,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-13 22:46:02,546 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:02,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:02,546 INFO L82 PathProgramCache]: Analyzing trace with hash -201766926, now seen corresponding path program 4 times [2021-10-13 22:46:02,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:02,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093418832] [2021-10-13 22:46:02,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:02,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:02,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:02,626 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 22:46:02,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:02,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093418832] [2021-10-13 22:46:02,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093418832] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:02,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40933378] [2021-10-13 22:46:02,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:46:02,626 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:02,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:02,627 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 22:46:02,628 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 22:46:03,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:46:03,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:03,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 22:46:03,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:03,471 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 22:46:03,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40933378] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:03,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:03,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-10-13 22:46:03,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423156879] [2021-10-13 22:46:03,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 22:46:03,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:03,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 22:46:03,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-10-13 22:46:03,488 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:03,489 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 352 transitions, 6758 flow. Second operand has 16 states, 16 states have (on average 56.125) internal successors, (898), 16 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:03,489 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:03,489 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:03,489 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:04,190 INFO L129 PetriNetUnfolder]: 270/1842 cut-off events. [2021-10-13 22:46:04,190 INFO L130 PetriNetUnfolder]: For 21574/21745 co-relation queries the response was YES. [2021-10-13 22:46:04,201 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7779 conditions, 1842 events. 270/1842 cut-off events. For 21574/21745 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 17821 event pairs, 0 based on Foata normal form. 85/1735 useless extension candidates. Maximal degree in co-relation 7653. Up to 280 conditions per place. [2021-10-13 22:46:04,207 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 50 selfloop transitions, 323 changer transitions 19/438 dead transitions. [2021-10-13 22:46:04,207 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 438 transitions, 9891 flow [2021-10-13 22:46:04,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-10-13 22:46:04,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-10-13 22:46:04,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2371 transitions. [2021-10-13 22:46:04,215 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8504304160688666 [2021-10-13 22:46:04,215 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2371 transitions. [2021-10-13 22:46:04,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2371 transitions. [2021-10-13 22:46:04,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:04,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2371 transitions. [2021-10-13 22:46:04,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 57.829268292682926) internal successors, (2371), 41 states have internal predecessors, (2371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:04,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 68.0) internal successors, (2856), 42 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:04,244 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 68.0) internal successors, (2856), 42 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:04,244 INFO L186 Difference]: Start difference. First operand has 273 places, 352 transitions, 6758 flow. Second operand 41 states and 2371 transitions. [2021-10-13 22:46:04,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 438 transitions, 9891 flow [2021-10-13 22:46:04,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 438 transitions, 9629 flow, removed 70 selfloop flow, removed 20 redundant places. [2021-10-13 22:46:04,329 INFO L242 Difference]: Finished difference. Result has 302 places, 413 transitions, 8985 flow [2021-10-13 22:46:04,330 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=6566, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=8985, PETRI_PLACES=302, PETRI_TRANSITIONS=413} [2021-10-13 22:46:04,330 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 234 predicate places. [2021-10-13 22:46:04,330 INFO L470 AbstractCegarLoop]: Abstraction has has 302 places, 413 transitions, 8985 flow [2021-10-13 22:46:04,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 56.125) internal successors, (898), 16 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:04,330 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:04,330 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1] [2021-10-13 22:46:04,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-10-13 22:46:04,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:04,547 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:04,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:04,573 INFO L82 PathProgramCache]: Analyzing trace with hash -842108255, now seen corresponding path program 8 times [2021-10-13 22:46:04,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:04,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742473823] [2021-10-13 22:46:04,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:04,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:04,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:04,706 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:46:04,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:04,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742473823] [2021-10-13 22:46:04,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742473823] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:04,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165984434] [2021-10-13 22:46:04,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:46:04,707 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:04,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:04,720 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 22:46:04,720 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 22:46:05,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:46:05,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:05,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 22:46:05,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:05,707 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:46:05,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165984434] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:05,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:05,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-10-13 22:46:05,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834401997] [2021-10-13 22:46:05,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 22:46:05,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:05,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 22:46:05,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-10-13 22:46:05,708 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:05,709 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 413 transitions, 8985 flow. Second operand has 18 states, 18 states have (on average 56.111111111111114) internal successors, (1010), 18 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:05,709 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:05,709 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:05,709 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:06,096 INFO L129 PetriNetUnfolder]: 262/1823 cut-off events. [2021-10-13 22:46:06,096 INFO L130 PetriNetUnfolder]: For 21244/21371 co-relation queries the response was YES. [2021-10-13 22:46:06,107 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8088 conditions, 1823 events. 262/1823 cut-off events. For 21244/21371 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 17601 event pairs, 0 based on Foata normal form. 20/1652 useless extension candidates. Maximal degree in co-relation 7951. Up to 405 conditions per place. [2021-10-13 22:46:06,113 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 316 selfloop transitions, 67 changer transitions 5/434 dead transitions. [2021-10-13 22:46:06,113 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 434 transitions, 10323 flow [2021-10-13 22:46:06,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 22:46:06,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-13 22:46:06,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 810 transitions. [2021-10-13 22:46:06,114 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8508403361344538 [2021-10-13 22:46:06,114 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 810 transitions. [2021-10-13 22:46:06,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 810 transitions. [2021-10-13 22:46:06,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:06,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 810 transitions. [2021-10-13 22:46:06,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 57.857142857142854) internal successors, (810), 14 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:06,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 68.0) internal successors, (1020), 15 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:06,131 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 68.0) internal successors, (1020), 15 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:06,131 INFO L186 Difference]: Start difference. First operand has 302 places, 413 transitions, 8985 flow. Second operand 14 states and 810 transitions. [2021-10-13 22:46:06,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 434 transitions, 10323 flow [2021-10-13 22:46:06,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 434 transitions, 9346 flow, removed 309 selfloop flow, removed 42 redundant places. [2021-10-13 22:46:06,350 INFO L242 Difference]: Finished difference. Result has 270 places, 415 transitions, 8278 flow [2021-10-13 22:46:06,350 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=8040, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8278, PETRI_PLACES=270, PETRI_TRANSITIONS=415} [2021-10-13 22:46:06,350 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 202 predicate places. [2021-10-13 22:46:06,350 INFO L470 AbstractCegarLoop]: Abstraction has has 270 places, 415 transitions, 8278 flow [2021-10-13 22:46:06,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.111111111111114) internal successors, (1010), 18 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:06,351 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:06,351 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1] [2021-10-13 22:46:06,368 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 22:46:06,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:06,564 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:06,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:06,565 INFO L82 PathProgramCache]: Analyzing trace with hash -414965635, now seen corresponding path program 9 times [2021-10-13 22:46:06,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:06,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062183337] [2021-10-13 22:46:06,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:06,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:06,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:06,689 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:46:06,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:06,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062183337] [2021-10-13 22:46:06,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062183337] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:06,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685038890] [2021-10-13 22:46:06,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:46:06,690 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:06,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:06,691 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 22:46:06,715 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 22:46:07,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-13 22:46:07,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:07,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 22:46:07,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:07,621 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:46:07,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685038890] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:07,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:07,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-10-13 22:46:07,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337468412] [2021-10-13 22:46:07,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 22:46:07,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:07,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 22:46:07,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-10-13 22:46:07,623 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:07,623 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 415 transitions, 8278 flow. Second operand has 18 states, 18 states have (on average 56.111111111111114) internal successors, (1010), 18 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:07,623 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:07,623 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:07,623 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:07,995 INFO L129 PetriNetUnfolder]: 263/1825 cut-off events. [2021-10-13 22:46:07,995 INFO L130 PetriNetUnfolder]: For 18599/18696 co-relation queries the response was YES. [2021-10-13 22:46:08,009 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7603 conditions, 1825 events. 263/1825 cut-off events. For 18599/18696 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 17662 event pairs, 0 based on Foata normal form. 20/1655 useless extension candidates. Maximal degree in co-relation 7483. Up to 390 conditions per place. [2021-10-13 22:46:08,043 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 299 selfloop transitions, 85 changer transitions 5/435 dead transitions. [2021-10-13 22:46:08,043 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 435 transitions, 9593 flow [2021-10-13 22:46:08,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 22:46:08,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-13 22:46:08,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 868 transitions. [2021-10-13 22:46:08,044 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8509803921568627 [2021-10-13 22:46:08,044 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 868 transitions. [2021-10-13 22:46:08,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 868 transitions. [2021-10-13 22:46:08,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:08,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 868 transitions. [2021-10-13 22:46:08,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 57.86666666666667) internal successors, (868), 15 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:08,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 68.0) internal successors, (1088), 16 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:08,046 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 68.0) internal successors, (1088), 16 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:08,046 INFO L186 Difference]: Start difference. First operand has 270 places, 415 transitions, 8278 flow. Second operand 15 states and 868 transitions. [2021-10-13 22:46:08,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 435 transitions, 9593 flow [2021-10-13 22:46:08,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 435 transitions, 9474 flow, removed 11 selfloop flow, removed 11 redundant places. [2021-10-13 22:46:08,145 INFO L242 Difference]: Finished difference. Result has 275 places, 417 transitions, 8463 flow [2021-10-13 22:46:08,145 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=8169, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8463, PETRI_PLACES=275, PETRI_TRANSITIONS=417} [2021-10-13 22:46:08,145 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 207 predicate places. [2021-10-13 22:46:08,145 INFO L470 AbstractCegarLoop]: Abstraction has has 275 places, 417 transitions, 8463 flow [2021-10-13 22:46:08,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.111111111111114) internal successors, (1010), 18 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:08,145 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:08,145 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1] [2021-10-13 22:46:08,177 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 22:46:08,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:08,363 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:08,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:08,363 INFO L82 PathProgramCache]: Analyzing trace with hash -357250781, now seen corresponding path program 10 times [2021-10-13 22:46:08,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:08,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017024147] [2021-10-13 22:46:08,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:08,363 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:08,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:08,500 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:46:08,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:08,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017024147] [2021-10-13 22:46:08,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017024147] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:08,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837522516] [2021-10-13 22:46:08,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:46:08,501 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:08,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:08,502 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 22:46:08,530 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 22:46:09,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:46:09,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:09,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 22:46:09,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:09,564 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:46:09,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837522516] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:09,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:09,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-10-13 22:46:09,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043205184] [2021-10-13 22:46:09,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 22:46:09,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:09,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 22:46:09,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-10-13 22:46:09,566 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:09,566 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 417 transitions, 8463 flow. Second operand has 18 states, 18 states have (on average 56.111111111111114) internal successors, (1010), 18 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:09,566 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:09,566 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:09,566 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:10,365 INFO L129 PetriNetUnfolder]: 291/2016 cut-off events. [2021-10-13 22:46:10,366 INFO L130 PetriNetUnfolder]: For 24071/24190 co-relation queries the response was YES. [2021-10-13 22:46:10,377 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8609 conditions, 2016 events. 291/2016 cut-off events. For 24071/24190 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 19768 event pairs, 0 based on Foata normal form. 50/1855 useless extension candidates. Maximal degree in co-relation 8487. Up to 336 conditions per place. [2021-10-13 22:46:10,388 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 155 selfloop transitions, 256 changer transitions 11/468 dead transitions. [2021-10-13 22:46:10,389 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 468 transitions, 10923 flow [2021-10-13 22:46:10,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 22:46:10,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-10-13 22:46:10,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1735 transitions. [2021-10-13 22:46:10,390 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8504901960784313 [2021-10-13 22:46:10,390 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1735 transitions. [2021-10-13 22:46:10,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1735 transitions. [2021-10-13 22:46:10,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:10,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1735 transitions. [2021-10-13 22:46:10,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 57.833333333333336) internal successors, (1735), 30 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:10,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 68.0) internal successors, (2108), 31 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:10,393 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 68.0) internal successors, (2108), 31 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:10,393 INFO L186 Difference]: Start difference. First operand has 275 places, 417 transitions, 8463 flow. Second operand 30 states and 1735 transitions. [2021-10-13 22:46:10,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 468 transitions, 10923 flow [2021-10-13 22:46:10,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 468 transitions, 10737 flow, removed 32 selfloop flow, removed 12 redundant places. [2021-10-13 22:46:10,483 INFO L242 Difference]: Finished difference. Result has 299 places, 453 transitions, 10020 flow [2021-10-13 22:46:10,483 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=8330, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=10020, PETRI_PLACES=299, PETRI_TRANSITIONS=453} [2021-10-13 22:46:10,483 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 231 predicate places. [2021-10-13 22:46:10,484 INFO L470 AbstractCegarLoop]: Abstraction has has 299 places, 453 transitions, 10020 flow [2021-10-13 22:46:10,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.111111111111114) internal successors, (1010), 18 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:10,484 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:10,484 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1] [2021-10-13 22:46:10,517 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 22:46:10,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-13 22:46:10,715 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:10,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:10,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1166526175, now seen corresponding path program 11 times [2021-10-13 22:46:10,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:10,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834203577] [2021-10-13 22:46:10,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:10,716 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:10,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:10,830 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:46:10,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:10,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834203577] [2021-10-13 22:46:10,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834203577] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:10,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415702453] [2021-10-13 22:46:10,830 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:46:10,831 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:10,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:10,832 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 22:46:10,854 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 22:46:11,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 22:46:11,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:11,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 22:46:11,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:11,912 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:46:11,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415702453] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:11,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:11,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-10-13 22:46:11,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339615465] [2021-10-13 22:46:11,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 22:46:11,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:11,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 22:46:11,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-10-13 22:46:11,913 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:11,914 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 453 transitions, 10020 flow. Second operand has 18 states, 18 states have (on average 56.111111111111114) internal successors, (1010), 18 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:11,914 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:11,914 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:11,914 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:12,296 INFO L129 PetriNetUnfolder]: 288/2005 cut-off events. [2021-10-13 22:46:12,297 INFO L130 PetriNetUnfolder]: For 24391/24531 co-relation queries the response was YES. [2021-10-13 22:46:12,313 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8900 conditions, 2005 events. 288/2005 cut-off events. For 24391/24531 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 19639 event pairs, 0 based on Foata normal form. 20/1815 useless extension candidates. Maximal degree in co-relation 8771. Up to 420 conditions per place. [2021-10-13 22:46:12,343 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 318 selfloop transitions, 103 changer transitions 5/472 dead transitions. [2021-10-13 22:46:12,343 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 472 transitions, 11444 flow [2021-10-13 22:46:12,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 22:46:12,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-13 22:46:12,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 926 transitions. [2021-10-13 22:46:12,344 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8511029411764706 [2021-10-13 22:46:12,344 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 926 transitions. [2021-10-13 22:46:12,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 926 transitions. [2021-10-13 22:46:12,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:12,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 926 transitions. [2021-10-13 22:46:12,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 57.875) internal successors, (926), 16 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:12,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 68.0) internal successors, (1156), 17 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:12,346 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 68.0) internal successors, (1156), 17 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:12,346 INFO L186 Difference]: Start difference. First operand has 299 places, 453 transitions, 10020 flow. Second operand 16 states and 926 transitions. [2021-10-13 22:46:12,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 472 transitions, 11444 flow [2021-10-13 22:46:12,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 472 transitions, 10927 flow, removed 162 selfloop flow, removed 23 redundant places. [2021-10-13 22:46:12,529 INFO L242 Difference]: Finished difference. Result has 290 places, 454 transitions, 9849 flow [2021-10-13 22:46:12,530 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=9537, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=9849, PETRI_PLACES=290, PETRI_TRANSITIONS=454} [2021-10-13 22:46:12,530 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 222 predicate places. [2021-10-13 22:46:12,530 INFO L470 AbstractCegarLoop]: Abstraction has has 290 places, 454 transitions, 9849 flow [2021-10-13 22:46:12,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.111111111111114) internal successors, (1010), 18 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:12,530 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:12,530 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1] [2021-10-13 22:46:12,561 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 22:46:12,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-13 22:46:12,731 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:12,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:12,731 INFO L82 PathProgramCache]: Analyzing trace with hash -569516073, now seen corresponding path program 12 times [2021-10-13 22:46:12,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:12,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431848354] [2021-10-13 22:46:12,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:12,732 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:12,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:12,844 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:46:12,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:12,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431848354] [2021-10-13 22:46:12,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431848354] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:12,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322179499] [2021-10-13 22:46:12,861 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:46:12,861 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:12,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:12,870 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 22:46:12,871 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 22:46:13,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-13 22:46:13,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:13,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 22:46:13,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:13,985 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:46:13,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322179499] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:13,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:13,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-10-13 22:46:13,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402653410] [2021-10-13 22:46:13,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 22:46:13,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:13,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 22:46:13,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-10-13 22:46:13,986 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:13,987 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 454 transitions, 9849 flow. Second operand has 18 states, 18 states have (on average 56.111111111111114) internal successors, (1010), 18 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:13,987 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:13,987 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:13,987 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:14,611 INFO L129 PetriNetUnfolder]: 309/2140 cut-off events. [2021-10-13 22:46:14,611 INFO L130 PetriNetUnfolder]: For 27674/27832 co-relation queries the response was YES. [2021-10-13 22:46:14,625 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9527 conditions, 2140 events. 309/2140 cut-off events. For 27674/27832 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 21149 event pairs, 0 based on Foata normal form. 46/1962 useless extension candidates. Maximal degree in co-relation 9401. Up to 353 conditions per place. [2021-10-13 22:46:14,645 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 190 selfloop transitions, 246 changer transitions 11/493 dead transitions. [2021-10-13 22:46:14,645 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 493 transitions, 12109 flow [2021-10-13 22:46:14,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 22:46:14,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-10-13 22:46:14,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1505 transitions. [2021-10-13 22:46:14,648 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8512443438914027 [2021-10-13 22:46:14,648 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1505 transitions. [2021-10-13 22:46:14,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1505 transitions. [2021-10-13 22:46:14,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:14,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1505 transitions. [2021-10-13 22:46:14,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 57.88461538461539) internal successors, (1505), 26 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:14,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 68.0) internal successors, (1836), 27 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:14,654 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 68.0) internal successors, (1836), 27 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:14,654 INFO L186 Difference]: Start difference. First operand has 290 places, 454 transitions, 9849 flow. Second operand 26 states and 1505 transitions. [2021-10-13 22:46:14,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 493 transitions, 12109 flow [2021-10-13 22:46:14,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 493 transitions, 11916 flow, removed 18 selfloop flow, removed 14 redundant places. [2021-10-13 22:46:14,762 INFO L242 Difference]: Finished difference. Result has 307 places, 478 transitions, 11100 flow [2021-10-13 22:46:14,762 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=9688, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=11100, PETRI_PLACES=307, PETRI_TRANSITIONS=478} [2021-10-13 22:46:14,763 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 239 predicate places. [2021-10-13 22:46:14,763 INFO L470 AbstractCegarLoop]: Abstraction has has 307 places, 478 transitions, 11100 flow [2021-10-13 22:46:14,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.111111111111114) internal successors, (1010), 18 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:14,763 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:14,763 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, 1, 1] [2021-10-13 22:46:14,780 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 22:46:14,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-13 22:46:14,964 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:14,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:14,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1452866879, now seen corresponding path program 5 times [2021-10-13 22:46:14,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:14,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314106262] [2021-10-13 22:46:14,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:14,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:14,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:15,059 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 22:46:15,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:15,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314106262] [2021-10-13 22:46:15,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314106262] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:15,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314237202] [2021-10-13 22:46:15,060 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:46:15,060 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:15,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:15,063 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 22:46:15,064 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 22:46:15,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 22:46:15,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:15,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 22:46:15,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:16,242 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 22:46:16,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314237202] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:16,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:16,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-10-13 22:46:16,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837467197] [2021-10-13 22:46:16,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 22:46:16,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:16,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 22:46:16,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-10-13 22:46:16,245 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:16,246 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 478 transitions, 11100 flow. Second operand has 19 states, 19 states have (on average 56.10526315789474) internal successors, (1066), 19 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:16,246 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:16,246 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:16,246 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:16,870 INFO L129 PetriNetUnfolder]: 320/2246 cut-off events. [2021-10-13 22:46:16,870 INFO L130 PetriNetUnfolder]: For 30636/30790 co-relation queries the response was YES. [2021-10-13 22:46:16,885 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10297 conditions, 2246 events. 320/2246 cut-off events. For 30636/30790 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 22455 event pairs, 0 based on Foata normal form. 25/2035 useless extension candidates. Maximal degree in co-relation 10165. Up to 455 conditions per place. [2021-10-13 22:46:16,894 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 359 selfloop transitions, 117 changer transitions 13/535 dead transitions. [2021-10-13 22:46:16,894 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 535 transitions, 13652 flow [2021-10-13 22:46:16,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-13 22:46:16,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-10-13 22:46:16,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1556 transitions. [2021-10-13 22:46:16,896 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8474945533769063 [2021-10-13 22:46:16,897 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1556 transitions. [2021-10-13 22:46:16,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1556 transitions. [2021-10-13 22:46:16,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:16,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1556 transitions. [2021-10-13 22:46:16,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 57.629629629629626) internal successors, (1556), 27 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:16,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 68.0) internal successors, (1904), 28 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:16,900 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 68.0) internal successors, (1904), 28 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:16,900 INFO L186 Difference]: Start difference. First operand has 307 places, 478 transitions, 11100 flow. Second operand 27 states and 1556 transitions. [2021-10-13 22:46:16,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 535 transitions, 13652 flow [2021-10-13 22:46:17,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 535 transitions, 13322 flow, removed 91 selfloop flow, removed 20 redundant places. [2021-10-13 22:46:17,027 INFO L242 Difference]: Finished difference. Result has 321 places, 495 transitions, 11624 flow [2021-10-13 22:46:17,028 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=10814, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=11624, PETRI_PLACES=321, PETRI_TRANSITIONS=495} [2021-10-13 22:46:17,028 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 253 predicate places. [2021-10-13 22:46:17,028 INFO L470 AbstractCegarLoop]: Abstraction has has 321 places, 495 transitions, 11624 flow [2021-10-13 22:46:17,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 56.10526315789474) internal successors, (1066), 19 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:17,028 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:17,028 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, 1, 1] [2021-10-13 22:46:17,048 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 22:46:17,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:17,231 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:17,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:17,232 INFO L82 PathProgramCache]: Analyzing trace with hash -125569477, now seen corresponding path program 6 times [2021-10-13 22:46:17,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:17,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436250565] [2021-10-13 22:46:17,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:17,232 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:17,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:17,353 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 22:46:17,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:17,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436250565] [2021-10-13 22:46:17,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436250565] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:17,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571352476] [2021-10-13 22:46:17,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:46:17,354 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:17,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:17,354 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 22:46:17,361 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 22:46:18,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 22:46:18,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:18,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 22:46:18,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:18,458 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 22:46:18,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571352476] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:18,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:18,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-10-13 22:46:18,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137047944] [2021-10-13 22:46:18,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 22:46:18,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:18,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 22:46:18,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-10-13 22:46:18,460 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:18,460 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 495 transitions, 11624 flow. Second operand has 19 states, 19 states have (on average 56.10526315789474) internal successors, (1066), 19 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:18,461 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:18,461 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:18,461 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:19,091 INFO L129 PetriNetUnfolder]: 318/2244 cut-off events. [2021-10-13 22:46:19,092 INFO L130 PetriNetUnfolder]: For 29659/29822 co-relation queries the response was YES. [2021-10-13 22:46:19,109 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10318 conditions, 2244 events. 318/2244 cut-off events. For 29659/29822 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 22569 event pairs, 0 based on Foata normal form. 22/2030 useless extension candidates. Maximal degree in co-relation 10178. Up to 457 conditions per place. [2021-10-13 22:46:19,116 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 359 selfloop transitions, 121 changer transitions 5/531 dead transitions. [2021-10-13 22:46:19,116 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 531 transitions, 13564 flow [2021-10-13 22:46:19,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-13 22:46:19,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-10-13 22:46:19,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1437 transitions. [2021-10-13 22:46:19,118 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8452941176470589 [2021-10-13 22:46:19,118 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1437 transitions. [2021-10-13 22:46:19,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1437 transitions. [2021-10-13 22:46:19,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:19,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1437 transitions. [2021-10-13 22:46:19,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 57.48) internal successors, (1437), 25 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:19,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 68.0) internal successors, (1768), 26 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:19,121 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 68.0) internal successors, (1768), 26 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:19,121 INFO L186 Difference]: Start difference. First operand has 321 places, 495 transitions, 11624 flow. Second operand 25 states and 1437 transitions. [2021-10-13 22:46:19,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 531 transitions, 13564 flow [2021-10-13 22:46:19,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 531 transitions, 13442 flow, removed 31 selfloop flow, removed 16 redundant places. [2021-10-13 22:46:19,278 INFO L242 Difference]: Finished difference. Result has 329 places, 502 transitions, 12083 flow [2021-10-13 22:46:19,278 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=11514, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=12083, PETRI_PLACES=329, PETRI_TRANSITIONS=502} [2021-10-13 22:46:19,278 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 261 predicate places. [2021-10-13 22:46:19,279 INFO L470 AbstractCegarLoop]: Abstraction has has 329 places, 502 transitions, 12083 flow [2021-10-13 22:46:19,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 56.10526315789474) internal successors, (1066), 19 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:19,279 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:19,279 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, 1, 1] [2021-10-13 22:46:19,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-10-13 22:46:19,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:19,488 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:19,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:19,489 INFO L82 PathProgramCache]: Analyzing trace with hash 716812209, now seen corresponding path program 7 times [2021-10-13 22:46:19,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:19,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709755521] [2021-10-13 22:46:19,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:19,489 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:19,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:19,594 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 22:46:19,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:19,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709755521] [2021-10-13 22:46:19,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709755521] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:19,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513934977] [2021-10-13 22:46:19,595 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:46:19,595 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:19,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:19,616 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 22:46:19,652 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 22:46:20,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:20,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 22:46:20,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:20,864 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 22:46:20,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513934977] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:20,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:20,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-10-13 22:46:20,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643025478] [2021-10-13 22:46:20,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 22:46:20,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:20,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 22:46:20,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-10-13 22:46:20,866 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:20,866 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 502 transitions, 12083 flow. Second operand has 19 states, 19 states have (on average 56.10526315789474) internal successors, (1066), 19 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:20,867 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:20,867 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:20,867 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:21,507 INFO L129 PetriNetUnfolder]: 321/2271 cut-off events. [2021-10-13 22:46:21,507 INFO L130 PetriNetUnfolder]: For 32113/32281 co-relation queries the response was YES. [2021-10-13 22:46:21,525 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10594 conditions, 2271 events. 321/2271 cut-off events. For 32113/32281 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 22903 event pairs, 0 based on Foata normal form. 22/2054 useless extension candidates. Maximal degree in co-relation 10453. Up to 437 conditions per place. [2021-10-13 22:46:21,532 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 337 selfloop transitions, 148 changer transitions 5/536 dead transitions. [2021-10-13 22:46:21,533 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 536 transitions, 13962 flow [2021-10-13 22:46:21,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-13 22:46:21,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-10-13 22:46:21,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1438 transitions. [2021-10-13 22:46:21,534 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8458823529411764 [2021-10-13 22:46:21,534 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1438 transitions. [2021-10-13 22:46:21,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1438 transitions. [2021-10-13 22:46:21,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:21,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1438 transitions. [2021-10-13 22:46:21,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 57.52) internal successors, (1438), 25 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:21,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 68.0) internal successors, (1768), 26 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:21,537 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 68.0) internal successors, (1768), 26 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:21,537 INFO L186 Difference]: Start difference. First operand has 329 places, 502 transitions, 12083 flow. Second operand 25 states and 1438 transitions. [2021-10-13 22:46:21,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 536 transitions, 13962 flow [2021-10-13 22:46:21,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 536 transitions, 13824 flow, removed 11 selfloop flow, removed 17 redundant places. [2021-10-13 22:46:21,699 INFO L242 Difference]: Finished difference. Result has 339 places, 507 transitions, 12533 flow [2021-10-13 22:46:21,699 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=11955, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=12533, PETRI_PLACES=339, PETRI_TRANSITIONS=507} [2021-10-13 22:46:21,699 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 271 predicate places. [2021-10-13 22:46:21,699 INFO L470 AbstractCegarLoop]: Abstraction has has 339 places, 507 transitions, 12533 flow [2021-10-13 22:46:21,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 56.10526315789474) internal successors, (1066), 19 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:21,699 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:21,700 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, 1, 1] [2021-10-13 22:46:21,717 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 22:46:21,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-10-13 22:46:21,916 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:21,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:21,916 INFO L82 PathProgramCache]: Analyzing trace with hash -279802665, now seen corresponding path program 8 times [2021-10-13 22:46:21,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:21,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267611739] [2021-10-13 22:46:21,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:21,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:21,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:22,026 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 22:46:22,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:22,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267611739] [2021-10-13 22:46:22,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267611739] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:22,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430323156] [2021-10-13 22:46:22,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:46:22,027 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:22,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:22,028 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 22:46:22,029 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 22:46:22,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:46:22,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:22,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 22:46:22,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:23,278 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 22:46:23,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430323156] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:23,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:23,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-10-13 22:46:23,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796151723] [2021-10-13 22:46:23,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 22:46:23,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:23,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 22:46:23,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-10-13 22:46:23,279 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:23,280 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 507 transitions, 12533 flow. Second operand has 19 states, 19 states have (on average 56.10526315789474) internal successors, (1066), 19 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:23,303 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:23,303 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:23,303 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:24,136 INFO L129 PetriNetUnfolder]: 338/2365 cut-off events. [2021-10-13 22:46:24,136 INFO L130 PetriNetUnfolder]: For 38889/39079 co-relation queries the response was YES. [2021-10-13 22:46:24,155 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11350 conditions, 2365 events. 338/2365 cut-off events. For 38889/39079 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 24027 event pairs, 0 based on Foata normal form. 59/2176 useless extension candidates. Maximal degree in co-relation 11205. Up to 364 conditions per place. [2021-10-13 22:46:24,163 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 164 selfloop transitions, 332 changer transitions 13/555 dead transitions. [2021-10-13 22:46:24,163 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 555 transitions, 15042 flow [2021-10-13 22:46:24,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-13 22:46:24,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-10-13 22:46:24,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2021 transitions. [2021-10-13 22:46:24,165 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8491596638655462 [2021-10-13 22:46:24,165 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2021 transitions. [2021-10-13 22:46:24,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2021 transitions. [2021-10-13 22:46:24,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:24,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2021 transitions. [2021-10-13 22:46:24,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 57.74285714285714) internal successors, (2021), 35 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:24,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 68.0) internal successors, (2448), 36 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 22:46:24,169 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 68.0) internal successors, (2448), 36 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 22:46:24,169 INFO L186 Difference]: Start difference. First operand has 339 places, 507 transitions, 12533 flow. Second operand 35 states and 2021 transitions. [2021-10-13 22:46:24,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 555 transitions, 15042 flow [2021-10-13 22:46:24,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 555 transitions, 14857 flow, removed 13 selfloop flow, removed 18 redundant places. [2021-10-13 22:46:24,358 INFO L242 Difference]: Finished difference. Result has 364 places, 524 transitions, 13757 flow [2021-10-13 22:46:24,358 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=12370, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=316, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=13757, PETRI_PLACES=364, PETRI_TRANSITIONS=524} [2021-10-13 22:46:24,358 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 296 predicate places. [2021-10-13 22:46:24,358 INFO L470 AbstractCegarLoop]: Abstraction has has 364 places, 524 transitions, 13757 flow [2021-10-13 22:46:24,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 56.10526315789474) internal successors, (1066), 19 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:24,359 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:24,359 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, 1, 1] [2021-10-13 22:46:24,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-10-13 22:46:24,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-10-13 22:46:24,563 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:24,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:24,564 INFO L82 PathProgramCache]: Analyzing trace with hash -834731165, now seen corresponding path program 9 times [2021-10-13 22:46:24,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:24,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658000511] [2021-10-13 22:46:24,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:24,564 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:24,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:24,663 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 22:46:24,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:24,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658000511] [2021-10-13 22:46:24,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658000511] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:24,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920480077] [2021-10-13 22:46:24,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:46:24,664 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:24,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:24,665 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 22:46:24,692 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 22:46:25,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 22:46:25,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:25,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 22:46:25,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:26,001 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 22:46:26,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920480077] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:26,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:26,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-10-13 22:46:26,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969811309] [2021-10-13 22:46:26,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 22:46:26,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:26,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 22:46:26,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-10-13 22:46:26,004 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:26,004 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 524 transitions, 13757 flow. Second operand has 19 states, 19 states have (on average 56.10526315789474) internal successors, (1066), 19 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:26,004 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:26,004 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:26,004 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:27,056 INFO L129 PetriNetUnfolder]: 382/2685 cut-off events. [2021-10-13 22:46:27,057 INFO L130 PetriNetUnfolder]: For 52094/52310 co-relation queries the response was YES. [2021-10-13 22:46:27,081 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13539 conditions, 2685 events. 382/2685 cut-off events. For 52094/52310 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 28486 event pairs, 0 based on Foata normal form. 86/2489 useless extension candidates. Maximal degree in co-relation 13385. Up to 438 conditions per place. [2021-10-13 22:46:27,090 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 69 selfloop transitions, 479 changer transitions 17/611 dead transitions. [2021-10-13 22:46:27,090 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 611 transitions, 18221 flow [2021-10-13 22:46:27,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-10-13 22:46:27,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-10-13 22:46:27,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2656 transitions. [2021-10-13 22:46:27,092 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8491048593350383 [2021-10-13 22:46:27,092 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2656 transitions. [2021-10-13 22:46:27,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2656 transitions. [2021-10-13 22:46:27,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:27,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2656 transitions. [2021-10-13 22:46:27,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 57.73913043478261) internal successors, (2656), 46 states have internal predecessors, (2656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:27,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 68.0) internal successors, (3196), 47 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:27,097 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 68.0) internal successors, (3196), 47 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:27,097 INFO L186 Difference]: Start difference. First operand has 364 places, 524 transitions, 13757 flow. Second operand 46 states and 2656 transitions. [2021-10-13 22:46:27,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 611 transitions, 18221 flow [2021-10-13 22:46:27,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 611 transitions, 17835 flow, removed 73 selfloop flow, removed 27 redundant places. [2021-10-13 22:46:27,315 INFO L242 Difference]: Finished difference. Result has 388 places, 581 transitions, 16764 flow [2021-10-13 22:46:27,316 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=13435, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=434, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=16764, PETRI_PLACES=388, PETRI_TRANSITIONS=581} [2021-10-13 22:46:27,316 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 320 predicate places. [2021-10-13 22:46:27,316 INFO L470 AbstractCegarLoop]: Abstraction has has 388 places, 581 transitions, 16764 flow [2021-10-13 22:46:27,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 56.10526315789474) internal successors, (1066), 19 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:27,316 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:27,316 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, 1, 1] [2021-10-13 22:46:27,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-13 22:46:27,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:27,534 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:27,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:27,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1672441695, now seen corresponding path program 10 times [2021-10-13 22:46:27,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:27,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513833929] [2021-10-13 22:46:27,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:27,535 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:27,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:27,641 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 22:46:27,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:27,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513833929] [2021-10-13 22:46:27,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513833929] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:27,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727381850] [2021-10-13 22:46:27,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:46:27,641 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:27,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:27,642 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 22:46:27,643 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 22:46:28,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:46:28,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:28,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 22:46:28,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:28,980 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 22:46:28,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727381850] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:28,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:28,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-10-13 22:46:28,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92923416] [2021-10-13 22:46:28,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 22:46:28,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:28,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 22:46:28,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-10-13 22:46:28,981 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:28,982 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 581 transitions, 16764 flow. Second operand has 19 states, 19 states have (on average 56.10526315789474) internal successors, (1066), 19 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:28,982 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:28,982 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:28,982 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:29,701 INFO L129 PetriNetUnfolder]: 387/2783 cut-off events. [2021-10-13 22:46:29,701 INFO L130 PetriNetUnfolder]: For 51714/51905 co-relation queries the response was YES. [2021-10-13 22:46:29,727 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14461 conditions, 2783 events. 387/2783 cut-off events. For 51714/51905 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 29938 event pairs, 0 based on Foata normal form. 28/2517 useless extension candidates. Maximal degree in co-relation 14302. Up to 489 conditions per place. [2021-10-13 22:46:29,738 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 354 selfloop transitions, 233 changer transitions 5/638 dead transitions. [2021-10-13 22:46:29,738 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 638 transitions, 19662 flow [2021-10-13 22:46:29,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-13 22:46:29,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-10-13 22:46:29,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2011 transitions. [2021-10-13 22:46:29,739 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8449579831932773 [2021-10-13 22:46:29,739 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2011 transitions. [2021-10-13 22:46:29,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2011 transitions. [2021-10-13 22:46:29,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:29,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2011 transitions. [2021-10-13 22:46:29,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 57.457142857142856) internal successors, (2011), 35 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:29,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 68.0) internal successors, (2448), 36 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 22:46:29,743 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 68.0) internal successors, (2448), 36 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 22:46:29,743 INFO L186 Difference]: Start difference. First operand has 388 places, 581 transitions, 16764 flow. Second operand 35 states and 2011 transitions. [2021-10-13 22:46:29,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 638 transitions, 19662 flow [2021-10-13 22:46:30,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 638 transitions, 18390 flow, removed 466 selfloop flow, removed 39 redundant places. [2021-10-13 22:46:30,227 INFO L242 Difference]: Finished difference. Result has 384 places, 599 transitions, 16882 flow [2021-10-13 22:46:30,227 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=15576, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=16882, PETRI_PLACES=384, PETRI_TRANSITIONS=599} [2021-10-13 22:46:30,227 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 316 predicate places. [2021-10-13 22:46:30,228 INFO L470 AbstractCegarLoop]: Abstraction has has 384 places, 599 transitions, 16882 flow [2021-10-13 22:46:30,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 56.10526315789474) internal successors, (1066), 19 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:30,228 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:30,228 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, 1, 1] [2021-10-13 22:46:30,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-13 22:46:30,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:30,443 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:30,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:30,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1409874603, now seen corresponding path program 11 times [2021-10-13 22:46:30,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:30,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812967655] [2021-10-13 22:46:30,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:30,444 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:30,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:30,542 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 22:46:30,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:30,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812967655] [2021-10-13 22:46:30,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812967655] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:30,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034992150] [2021-10-13 22:46:30,542 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:46:30,543 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:30,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:30,544 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 22:46:30,545 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 22:46:31,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 22:46:31,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:31,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 22:46:31,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:31,952 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 22:46:31,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034992150] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:31,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:31,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-10-13 22:46:31,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224294450] [2021-10-13 22:46:31,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 22:46:31,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:31,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 22:46:31,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-10-13 22:46:31,962 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:31,963 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 599 transitions, 16882 flow. Second operand has 19 states, 19 states have (on average 56.10526315789474) internal successors, (1066), 19 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:31,963 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:31,963 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:31,963 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:32,907 INFO L129 PetriNetUnfolder]: 398/2882 cut-off events. [2021-10-13 22:46:32,907 INFO L130 PetriNetUnfolder]: For 51253/51452 co-relation queries the response was YES. [2021-10-13 22:46:32,932 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14645 conditions, 2882 events. 398/2882 cut-off events. For 51253/51452 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 31390 event pairs, 0 based on Foata normal form. 36/2613 useless extension candidates. Maximal degree in co-relation 14488. Up to 435 conditions per place. [2021-10-13 22:46:32,942 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 287 selfloop transitions, 313 changer transitions 5/651 dead transitions. [2021-10-13 22:46:32,942 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 651 transitions, 19638 flow [2021-10-13 22:46:32,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-13 22:46:32,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-10-13 22:46:32,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2128 transitions. [2021-10-13 22:46:32,944 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8457869634340223 [2021-10-13 22:46:32,944 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2128 transitions. [2021-10-13 22:46:32,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2128 transitions. [2021-10-13 22:46:32,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:32,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2128 transitions. [2021-10-13 22:46:32,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 57.513513513513516) internal successors, (2128), 37 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:32,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 68.0) internal successors, (2584), 38 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:32,947 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 68.0) internal successors, (2584), 38 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:32,947 INFO L186 Difference]: Start difference. First operand has 384 places, 599 transitions, 16882 flow. Second operand 37 states and 2128 transitions. [2021-10-13 22:46:32,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 651 transitions, 19638 flow [2021-10-13 22:46:33,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 651 transitions, 19192 flow, removed 54 selfloop flow, removed 30 redundant places. [2021-10-13 22:46:33,248 INFO L242 Difference]: Finished difference. Result has 394 places, 612 transitions, 17822 flow [2021-10-13 22:46:33,249 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=16456, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=301, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=17822, PETRI_PLACES=394, PETRI_TRANSITIONS=612} [2021-10-13 22:46:33,249 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 326 predicate places. [2021-10-13 22:46:33,249 INFO L470 AbstractCegarLoop]: Abstraction has has 394 places, 612 transitions, 17822 flow [2021-10-13 22:46:33,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 56.10526315789474) internal successors, (1066), 19 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:33,249 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:33,249 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, 1, 1] [2021-10-13 22:46:33,268 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 22:46:33,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:33,468 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:33,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:33,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1120589463, now seen corresponding path program 12 times [2021-10-13 22:46:33,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:33,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374253789] [2021-10-13 22:46:33,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:33,468 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:33,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:33,544 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 22:46:33,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:33,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374253789] [2021-10-13 22:46:33,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374253789] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:33,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717635932] [2021-10-13 22:46:33,544 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:46:33,545 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:33,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:33,551 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 22:46:33,553 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 22:46:34,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-13 22:46:34,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:34,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 22:46:34,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:34,996 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 22:46:34,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717635932] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:34,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:34,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-10-13 22:46:34,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281297438] [2021-10-13 22:46:34,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 22:46:34,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:34,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 22:46:34,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-10-13 22:46:34,998 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:34,998 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 612 transitions, 17822 flow. Second operand has 19 states, 19 states have (on average 56.10526315789474) internal successors, (1066), 19 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:34,998 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:34,998 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:34,999 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:35,906 INFO L129 PetriNetUnfolder]: 402/2911 cut-off events. [2021-10-13 22:46:35,906 INFO L130 PetriNetUnfolder]: For 55234/55444 co-relation queries the response was YES. [2021-10-13 22:46:35,928 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15053 conditions, 2911 events. 402/2911 cut-off events. For 55234/55444 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 31793 event pairs, 0 based on Foata normal form. 54/2657 useless extension candidates. Maximal degree in co-relation 14897. Up to 422 conditions per place. [2021-10-13 22:46:35,938 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 218 selfloop transitions, 380 changer transitions 5/649 dead transitions. [2021-10-13 22:46:35,938 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 649 transitions, 20163 flow [2021-10-13 22:46:35,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-13 22:46:35,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-10-13 22:46:35,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1960 transitions. [2021-10-13 22:46:35,940 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8477508650519031 [2021-10-13 22:46:35,940 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1960 transitions. [2021-10-13 22:46:35,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1960 transitions. [2021-10-13 22:46:35,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:35,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1960 transitions. [2021-10-13 22:46:35,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 57.64705882352941) internal successors, (1960), 34 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:35,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 68.0) internal successors, (2380), 35 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:35,943 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 68.0) internal successors, (2380), 35 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:35,943 INFO L186 Difference]: Start difference. First operand has 394 places, 612 transitions, 17822 flow. Second operand 34 states and 1960 transitions. [2021-10-13 22:46:35,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 649 transitions, 20163 flow [2021-10-13 22:46:36,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 649 transitions, 19823 flow, removed 48 selfloop flow, removed 30 redundant places. [2021-10-13 22:46:36,200 INFO L242 Difference]: Finished difference. Result has 398 places, 616 transitions, 18689 flow [2021-10-13 22:46:36,201 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=17492, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=376, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=18689, PETRI_PLACES=398, PETRI_TRANSITIONS=616} [2021-10-13 22:46:36,201 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 330 predicate places. [2021-10-13 22:46:36,201 INFO L470 AbstractCegarLoop]: Abstraction has has 398 places, 616 transitions, 18689 flow [2021-10-13 22:46:36,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 56.10526315789474) internal successors, (1066), 19 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:36,201 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:36,201 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, 1, 1] [2021-10-13 22:46:36,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-13 22:46:36,411 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,SelfDestructingSolverStorable35 [2021-10-13 22:46:36,411 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:36,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:36,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1451645877, now seen corresponding path program 13 times [2021-10-13 22:46:36,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:36,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409542499] [2021-10-13 22:46:36,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:36,412 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:36,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:36,515 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 22:46:36,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:36,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409542499] [2021-10-13 22:46:36,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409542499] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:36,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870727004] [2021-10-13 22:46:36,516 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:46:36,516 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:36,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:36,517 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 22:46:36,518 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 22:46:37,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:37,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 22:46:37,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:37,876 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 22:46:37,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870727004] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:37,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:37,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-10-13 22:46:37,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777798790] [2021-10-13 22:46:37,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 22:46:37,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:37,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 22:46:37,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-10-13 22:46:37,885 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:37,885 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 616 transitions, 18689 flow. Second operand has 19 states, 19 states have (on average 56.10526315789474) internal successors, (1066), 19 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:37,885 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:37,885 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:37,885 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:39,071 INFO L129 PetriNetUnfolder]: 462/3278 cut-off events. [2021-10-13 22:46:39,071 INFO L130 PetriNetUnfolder]: For 76949/77237 co-relation queries the response was YES. [2021-10-13 22:46:39,094 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17905 conditions, 3278 events. 462/3278 cut-off events. For 76949/77237 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 36454 event pairs, 0 based on Foata normal form. 93/3027 useless extension candidates. Maximal degree in co-relation 17749. Up to 508 conditions per place. [2021-10-13 22:46:39,105 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 86 selfloop transitions, 568 changer transitions 25/725 dead transitions. [2021-10-13 22:46:39,105 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 725 transitions, 24276 flow [2021-10-13 22:46:39,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-10-13 22:46:39,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-10-13 22:46:39,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3062 transitions. [2021-10-13 22:46:39,107 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8496115427302997 [2021-10-13 22:46:39,107 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 3062 transitions. [2021-10-13 22:46:39,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 3062 transitions. [2021-10-13 22:46:39,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:39,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 3062 transitions. [2021-10-13 22:46:39,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 57.77358490566038) internal successors, (3062), 53 states have internal predecessors, (3062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:39,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 68.0) internal successors, (3672), 54 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:39,112 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 68.0) internal successors, (3672), 54 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:39,112 INFO L186 Difference]: Start difference. First operand has 398 places, 616 transitions, 18689 flow. Second operand 53 states and 3062 transitions. [2021-10-13 22:46:39,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 725 transitions, 24276 flow [2021-10-13 22:46:39,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 725 transitions, 23609 flow, removed 71 selfloop flow, removed 30 redundant places. [2021-10-13 22:46:39,417 INFO L242 Difference]: Finished difference. Result has 436 places, 686 transitions, 22181 flow [2021-10-13 22:46:39,417 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=18176, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=504, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=22181, PETRI_PLACES=436, PETRI_TRANSITIONS=686} [2021-10-13 22:46:39,417 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 368 predicate places. [2021-10-13 22:46:39,417 INFO L470 AbstractCegarLoop]: Abstraction has has 436 places, 686 transitions, 22181 flow [2021-10-13 22:46:39,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 56.10526315789474) internal successors, (1066), 19 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:39,418 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:39,418 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, 1, 1] [2021-10-13 22:46:39,436 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 22:46:39,636 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,SelfDestructingSolverStorable36 [2021-10-13 22:46:39,637 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:39,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:39,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1319519051, now seen corresponding path program 14 times [2021-10-13 22:46:39,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:39,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253625107] [2021-10-13 22:46:39,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:39,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:39,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:39,831 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 22:46:39,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:39,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253625107] [2021-10-13 22:46:39,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253625107] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:39,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068058935] [2021-10-13 22:46:39,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:46:39,831 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:39,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:39,832 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 22:46:39,851 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 22:46:40,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:46:40,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:40,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 22:46:40,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:41,251 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 22:46:41,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068058935] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:41,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:41,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-10-13 22:46:41,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042957135] [2021-10-13 22:46:41,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 22:46:41,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:41,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 22:46:41,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-10-13 22:46:41,253 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:41,254 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 686 transitions, 22181 flow. Second operand has 19 states, 19 states have (on average 56.10526315789474) internal successors, (1066), 19 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:41,254 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:41,254 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:41,254 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:42,718 INFO L129 PetriNetUnfolder]: 541/3920 cut-off events. [2021-10-13 22:46:42,719 INFO L130 PetriNetUnfolder]: For 94413/94708 co-relation queries the response was YES. [2021-10-13 22:46:42,753 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22063 conditions, 3920 events. 541/3920 cut-off events. For 94413/94708 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 45086 event pairs, 0 based on Foata normal form. 106/3612 useless extension candidates. Maximal degree in co-relation 21891. Up to 640 conditions per place. [2021-10-13 22:46:42,767 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 167 selfloop transitions, 613 changer transitions 17/843 dead transitions. [2021-10-13 22:46:42,767 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 843 transitions, 30039 flow [2021-10-13 22:46:42,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-10-13 22:46:42,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-10-13 22:46:42,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2886 transitions. [2021-10-13 22:46:42,769 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8488235294117648 [2021-10-13 22:46:42,769 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2886 transitions. [2021-10-13 22:46:42,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2886 transitions. [2021-10-13 22:46:42,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:42,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2886 transitions. [2021-10-13 22:46:42,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 57.72) internal successors, (2886), 50 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:42,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 68.0) internal successors, (3468), 51 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:42,775 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 68.0) internal successors, (3468), 51 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:42,775 INFO L186 Difference]: Start difference. First operand has 436 places, 686 transitions, 22181 flow. Second operand 50 states and 2886 transitions. [2021-10-13 22:46:42,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 843 transitions, 30039 flow [2021-10-13 22:46:43,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 843 transitions, 28477 flow, removed 569 selfloop flow, removed 37 redundant places. [2021-10-13 22:46:43,233 INFO L242 Difference]: Finished difference. Result has 453 places, 806 transitions, 27152 flow [2021-10-13 22:46:43,233 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=21039, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=515, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=27152, PETRI_PLACES=453, PETRI_TRANSITIONS=806} [2021-10-13 22:46:43,233 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 385 predicate places. [2021-10-13 22:46:43,233 INFO L470 AbstractCegarLoop]: Abstraction has has 453 places, 806 transitions, 27152 flow [2021-10-13 22:46:43,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 56.10526315789474) internal successors, (1066), 19 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:43,234 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:43,234 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, 1, 1] [2021-10-13 22:46:43,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-13 22:46:43,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-13 22:46:43,451 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:43,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:43,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1476551501, now seen corresponding path program 15 times [2021-10-13 22:46:43,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:43,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840020874] [2021-10-13 22:46:43,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:43,452 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:43,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:43,562 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 22:46:43,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:43,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840020874] [2021-10-13 22:46:43,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840020874] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:43,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904522792] [2021-10-13 22:46:43,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:46:43,562 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:43,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:43,563 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 22:46:43,579 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 22:46:44,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 22:46:44,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:44,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 22:46:44,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:45,055 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 22:46:45,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904522792] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:45,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:45,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-10-13 22:46:45,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75323006] [2021-10-13 22:46:45,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 22:46:45,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:45,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 22:46:45,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-10-13 22:46:45,057 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:45,057 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 806 transitions, 27152 flow. Second operand has 19 states, 19 states have (on average 56.10526315789474) internal successors, (1066), 19 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:45,057 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:45,057 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:45,057 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:46,544 INFO L129 PetriNetUnfolder]: 597/4325 cut-off events. [2021-10-13 22:46:46,544 INFO L130 PetriNetUnfolder]: For 109329/109729 co-relation queries the response was YES. [2021-10-13 22:46:46,587 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24772 conditions, 4325 events. 597/4325 cut-off events. For 109329/109729 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 50487 event pairs, 0 based on Foata normal form. 114/3981 useless extension candidates. Maximal degree in co-relation 24595. Up to 712 conditions per place. [2021-10-13 22:46:46,604 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 212 selfloop transitions, 644 changer transitions 22/924 dead transitions. [2021-10-13 22:46:46,604 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 924 transitions, 33624 flow [2021-10-13 22:46:46,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-10-13 22:46:46,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-10-13 22:46:46,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2774 transitions. [2021-10-13 22:46:46,606 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8498774509803921 [2021-10-13 22:46:46,606 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2774 transitions. [2021-10-13 22:46:46,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2774 transitions. [2021-10-13 22:46:46,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:46,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2774 transitions. [2021-10-13 22:46:46,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 57.791666666666664) internal successors, (2774), 48 states have internal predecessors, (2774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:46,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 68.0) internal successors, (3332), 49 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:46,610 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 68.0) internal successors, (3332), 49 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:46,610 INFO L186 Difference]: Start difference. First operand has 453 places, 806 transitions, 27152 flow. Second operand 48 states and 2774 transitions. [2021-10-13 22:46:46,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 924 transitions, 33624 flow [2021-10-13 22:46:47,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 924 transitions, 31611 flow, removed 821 selfloop flow, removed 33 redundant places. [2021-10-13 22:46:47,354 INFO L242 Difference]: Finished difference. Result has 477 places, 885 transitions, 29911 flow [2021-10-13 22:46:47,355 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=25349, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=806, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=577, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=29911, PETRI_PLACES=477, PETRI_TRANSITIONS=885} [2021-10-13 22:46:47,355 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 409 predicate places. [2021-10-13 22:46:47,355 INFO L470 AbstractCegarLoop]: Abstraction has has 477 places, 885 transitions, 29911 flow [2021-10-13 22:46:47,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 56.10526315789474) internal successors, (1066), 19 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:47,355 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:47,356 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-10-13 22:46:47,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-13 22:46:47,557 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,SelfDestructingSolverStorable38 [2021-10-13 22:46:47,558 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:47,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:47,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1764930725, now seen corresponding path program 3 times [2021-10-13 22:46:47,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:47,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749918890] [2021-10-13 22:46:47,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:47,558 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:47,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:47,689 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:46:47,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:47,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749918890] [2021-10-13 22:46:47,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749918890] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:47,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457959498] [2021-10-13 22:46:47,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:46:47,689 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:47,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:47,690 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 22:46:47,691 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 22:46:48,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-13 22:46:48,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:48,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:46:48,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:49,157 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:46:49,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457959498] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:49,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:49,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-13 22:46:49,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501667587] [2021-10-13 22:46:49,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:46:49,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:49,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:46:49,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:46:49,159 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:49,160 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 885 transitions, 29911 flow. Second operand has 21 states, 21 states have (on average 56.095238095238095) internal successors, (1178), 21 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:49,160 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:49,160 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:49,160 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:50,520 INFO L129 PetriNetUnfolder]: 609/4448 cut-off events. [2021-10-13 22:46:50,520 INFO L130 PetriNetUnfolder]: For 106401/106796 co-relation queries the response was YES. [2021-10-13 22:46:50,557 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25602 conditions, 4448 events. 609/4448 cut-off events. For 106401/106796 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 52010 event pairs, 0 based on Foata normal form. 32/4008 useless extension candidates. Maximal degree in co-relation 25416. Up to 1025 conditions per place. [2021-10-13 22:46:50,574 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 743 selfloop transitions, 128 changer transitions 11/928 dead transitions. [2021-10-13 22:46:50,574 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 928 transitions, 33927 flow [2021-10-13 22:46:50,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 22:46:50,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-13 22:46:50,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1390 transitions. [2021-10-13 22:46:50,576 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8517156862745098 [2021-10-13 22:46:50,576 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1390 transitions. [2021-10-13 22:46:50,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1390 transitions. [2021-10-13 22:46:50,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:50,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1390 transitions. [2021-10-13 22:46:50,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 57.916666666666664) internal successors, (1390), 24 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:50,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 68.0) internal successors, (1700), 25 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:50,578 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 68.0) internal successors, (1700), 25 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:50,578 INFO L186 Difference]: Start difference. First operand has 477 places, 885 transitions, 29911 flow. Second operand 24 states and 1390 transitions. [2021-10-13 22:46:50,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 928 transitions, 33927 flow [2021-10-13 22:46:51,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 928 transitions, 32895 flow, removed 421 selfloop flow, removed 27 redundant places. [2021-10-13 22:46:51,320 INFO L242 Difference]: Finished difference. Result has 472 places, 915 transitions, 30489 flow [2021-10-13 22:46:51,321 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=28895, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=885, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=780, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=30489, PETRI_PLACES=472, PETRI_TRANSITIONS=915} [2021-10-13 22:46:51,321 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 404 predicate places. [2021-10-13 22:46:51,322 INFO L470 AbstractCegarLoop]: Abstraction has has 472 places, 915 transitions, 30489 flow [2021-10-13 22:46:51,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 56.095238095238095) internal successors, (1178), 21 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:51,322 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:51,322 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1] [2021-10-13 22:46:51,341 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 22:46:51,532 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,SelfDestructingSolverStorable39 [2021-10-13 22:46:51,532 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:51,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:51,532 INFO L82 PathProgramCache]: Analyzing trace with hash -430550156, now seen corresponding path program 13 times [2021-10-13 22:46:51,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:51,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357213795] [2021-10-13 22:46:51,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:51,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:51,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:51,648 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:46:51,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:51,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357213795] [2021-10-13 22:46:51,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357213795] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:51,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961776793] [2021-10-13 22:46:51,648 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:46:51,648 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:51,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:51,649 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 22:46:51,650 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 22:46:52,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:52,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:46:52,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:53,298 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:46:53,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961776793] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:53,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:53,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-13 22:46:53,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637080761] [2021-10-13 22:46:53,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:46:53,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:53,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:46:53,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:46:53,300 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:53,300 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 915 transitions, 30489 flow. Second operand has 21 states, 21 states have (on average 56.095238095238095) internal successors, (1178), 21 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:53,300 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:53,300 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:53,300 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:54,614 INFO L129 PetriNetUnfolder]: 606/4437 cut-off events. [2021-10-13 22:46:54,614 INFO L130 PetriNetUnfolder]: For 96467/96885 co-relation queries the response was YES. [2021-10-13 22:46:54,653 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24976 conditions, 4437 events. 606/4437 cut-off events. For 96467/96885 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 52052 event pairs, 0 based on Foata normal form. 30/3996 useless extension candidates. Maximal degree in co-relation 24793. Up to 1025 conditions per place. [2021-10-13 22:46:54,671 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 791 selfloop transitions, 99 changer transitions 5/941 dead transitions. [2021-10-13 22:46:54,671 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 941 transitions, 33239 flow [2021-10-13 22:46:54,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 22:46:54,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-13 22:46:54,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 981 transitions. [2021-10-13 22:46:54,672 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8486159169550173 [2021-10-13 22:46:54,672 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 981 transitions. [2021-10-13 22:46:54,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 981 transitions. [2021-10-13 22:46:54,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:54,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 981 transitions. [2021-10-13 22:46:54,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 57.705882352941174) internal successors, (981), 17 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:54,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 68.0) internal successors, (1224), 18 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:54,674 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 68.0) internal successors, (1224), 18 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:54,674 INFO L186 Difference]: Start difference. First operand has 472 places, 915 transitions, 30489 flow. Second operand 17 states and 981 transitions. [2021-10-13 22:46:54,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 941 transitions, 33239 flow [2021-10-13 22:46:55,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 941 transitions, 32864 flow, removed 126 selfloop flow, removed 17 redundant places. [2021-10-13 22:46:55,261 INFO L242 Difference]: Finished difference. Result has 471 places, 917 transitions, 30465 flow [2021-10-13 22:46:55,262 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=30123, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=915, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=816, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=30465, PETRI_PLACES=471, PETRI_TRANSITIONS=917} [2021-10-13 22:46:55,262 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 403 predicate places. [2021-10-13 22:46:55,262 INFO L470 AbstractCegarLoop]: Abstraction has has 471 places, 917 transitions, 30465 flow [2021-10-13 22:46:55,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 56.095238095238095) internal successors, (1178), 21 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:55,263 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:55,263 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1] [2021-10-13 22:46:55,282 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 22:46:55,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:55,482 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:55,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:55,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1368755568, now seen corresponding path program 14 times [2021-10-13 22:46:55,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:55,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129774723] [2021-10-13 22:46:55,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:55,483 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:55,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:55,617 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:46:55,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:55,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129774723] [2021-10-13 22:46:55,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129774723] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:55,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753790208] [2021-10-13 22:46:55,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:46:55,618 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:55,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:55,628 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 22:46:55,715 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 22:46:56,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:46:56,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:56,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:46:56,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:57,361 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:46:57,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753790208] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:57,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:57,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-13 22:46:57,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367098324] [2021-10-13 22:46:57,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:46:57,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:57,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:46:57,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:46:57,363 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:57,363 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 917 transitions, 30465 flow. Second operand has 21 states, 21 states have (on average 56.095238095238095) internal successors, (1178), 21 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:57,363 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:57,363 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:57,363 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:58,507 INFO L129 PetriNetUnfolder]: 607/4446 cut-off events. [2021-10-13 22:46:58,508 INFO L130 PetriNetUnfolder]: For 98788/99214 co-relation queries the response was YES. [2021-10-13 22:46:58,545 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25043 conditions, 4446 events. 607/4446 cut-off events. For 98788/99214 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 52188 event pairs, 0 based on Foata normal form. 30/4004 useless extension candidates. Maximal degree in co-relation 24859. Up to 1002 conditions per place. [2021-10-13 22:46:58,561 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 766 selfloop transitions, 125 changer transitions 5/942 dead transitions. [2021-10-13 22:46:58,561 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 942 transitions, 33212 flow [2021-10-13 22:46:58,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 22:46:58,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-10-13 22:46:58,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1039 transitions. [2021-10-13 22:46:58,562 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8488562091503268 [2021-10-13 22:46:58,563 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1039 transitions. [2021-10-13 22:46:58,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1039 transitions. [2021-10-13 22:46:58,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:58,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1039 transitions. [2021-10-13 22:46:58,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 57.72222222222222) internal successors, (1039), 18 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:58,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 68.0) internal successors, (1292), 19 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:58,565 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 68.0) internal successors, (1292), 19 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:58,565 INFO L186 Difference]: Start difference. First operand has 471 places, 917 transitions, 30465 flow. Second operand 18 states and 1039 transitions. [2021-10-13 22:46:58,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 942 transitions, 33212 flow [2021-10-13 22:46:59,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 942 transitions, 33040 flow, removed 11 selfloop flow, removed 14 redundant places. [2021-10-13 22:46:59,129 INFO L242 Difference]: Finished difference. Result has 476 places, 919 transitions, 30724 flow [2021-10-13 22:46:59,129 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=30303, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=917, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=792, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=30724, PETRI_PLACES=476, PETRI_TRANSITIONS=919} [2021-10-13 22:46:59,129 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 408 predicate places. [2021-10-13 22:46:59,129 INFO L470 AbstractCegarLoop]: Abstraction has has 476 places, 919 transitions, 30724 flow [2021-10-13 22:46:59,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 56.095238095238095) internal successors, (1178), 21 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:59,130 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:59,130 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1] [2021-10-13 22:46:59,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-13 22:46:59,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:59,349 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:59,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:59,349 INFO L82 PathProgramCache]: Analyzing trace with hash 893689076, now seen corresponding path program 15 times [2021-10-13 22:46:59,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:59,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373971458] [2021-10-13 22:46:59,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:59,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:59,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:59,457 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:46:59,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:59,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373971458] [2021-10-13 22:46:59,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373971458] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:59,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335123280] [2021-10-13 22:46:59,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:46:59,458 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:59,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:59,459 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 22:46:59,460 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 22:47:00,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-13 22:47:00,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:00,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:47:00,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:01,210 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:01,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335123280] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:01,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:01,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-13 22:47:01,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278920776] [2021-10-13 22:47:01,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:47:01,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:01,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:47:01,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:47:01,229 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:47:01,229 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 919 transitions, 30724 flow. Second operand has 21 states, 21 states have (on average 56.095238095238095) internal successors, (1178), 21 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:01,230 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:01,230 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:47:01,230 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:02,336 INFO L129 PetriNetUnfolder]: 608/4448 cut-off events. [2021-10-13 22:47:02,336 INFO L130 PetriNetUnfolder]: For 102157/102559 co-relation queries the response was YES. [2021-10-13 22:47:02,378 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25200 conditions, 4448 events. 608/4448 cut-off events. For 102157/102559 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 52201 event pairs, 0 based on Foata normal form. 30/4007 useless extension candidates. Maximal degree in co-relation 25014. Up to 986 conditions per place. [2021-10-13 22:47:02,395 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 745 selfloop transitions, 144 changer transitions 5/940 dead transitions. [2021-10-13 22:47:02,396 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 940 transitions, 33415 flow [2021-10-13 22:47:02,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-13 22:47:02,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-13 22:47:02,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1097 transitions. [2021-10-13 22:47:02,397 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8490712074303406 [2021-10-13 22:47:02,397 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1097 transitions. [2021-10-13 22:47:02,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1097 transitions. [2021-10-13 22:47:02,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:02,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1097 transitions. [2021-10-13 22:47:02,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 57.73684210526316) internal successors, (1097), 19 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:02,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 68.0) internal successors, (1360), 20 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:02,398 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 68.0) internal successors, (1360), 20 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:02,399 INFO L186 Difference]: Start difference. First operand has 476 places, 919 transitions, 30724 flow. Second operand 19 states and 1097 transitions. [2021-10-13 22:47:02,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 940 transitions, 33415 flow [2021-10-13 22:47:03,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 940 transitions, 33200 flow, removed 18 selfloop flow, removed 15 redundant places. [2021-10-13 22:47:03,053 INFO L242 Difference]: Finished difference. Result has 480 places, 920 transitions, 30963 flow [2021-10-13 22:47:03,054 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=30529, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=919, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=775, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=30963, PETRI_PLACES=480, PETRI_TRANSITIONS=920} [2021-10-13 22:47:03,054 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 412 predicate places. [2021-10-13 22:47:03,054 INFO L470 AbstractCegarLoop]: Abstraction has has 480 places, 920 transitions, 30963 flow [2021-10-13 22:47:03,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 56.095238095238095) internal successors, (1178), 21 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:03,054 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:03,054 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1] [2021-10-13 22:47:03,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-10-13 22:47:03,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:03,273 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:03,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:03,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1636285390, now seen corresponding path program 16 times [2021-10-13 22:47:03,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:03,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591891914] [2021-10-13 22:47:03,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:03,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:03,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:03,398 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:03,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:03,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591891914] [2021-10-13 22:47:03,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591891914] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:03,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122400890] [2021-10-13 22:47:03,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:47:03,398 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:03,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:03,423 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 22:47:03,464 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 22:47:04,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:47:04,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:04,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:47:04,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:05,226 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:05,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122400890] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:05,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:05,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-13 22:47:05,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131329332] [2021-10-13 22:47:05,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:47:05,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:05,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:47:05,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:47:05,227 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:47:05,228 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 920 transitions, 30963 flow. Second operand has 21 states, 21 states have (on average 56.095238095238095) internal successors, (1178), 21 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:05,228 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:05,228 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:47:05,228 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:07,121 INFO L129 PetriNetUnfolder]: 647/4708 cut-off events. [2021-10-13 22:47:07,121 INFO L130 PetriNetUnfolder]: For 123495/123930 co-relation queries the response was YES. [2021-10-13 22:47:07,160 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27218 conditions, 4708 events. 647/4708 cut-off events. For 123495/123930 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 55769 event pairs, 0 based on Foata normal form. 124/4334 useless extension candidates. Maximal degree in co-relation 27031. Up to 755 conditions per place. [2021-10-13 22:47:07,178 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 192 selfloop transitions, 746 changer transitions 17/1001 dead transitions. [2021-10-13 22:47:07,178 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 1001 transitions, 36729 flow [2021-10-13 22:47:07,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-13 22:47:07,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-10-13 22:47:07,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2542 transitions. [2021-10-13 22:47:07,180 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8495989304812834 [2021-10-13 22:47:07,180 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2542 transitions. [2021-10-13 22:47:07,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2542 transitions. [2021-10-13 22:47:07,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:07,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2542 transitions. [2021-10-13 22:47:07,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 57.77272727272727) internal successors, (2542), 44 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:07,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 68.0) internal successors, (3060), 45 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:07,183 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 68.0) internal successors, (3060), 45 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:07,183 INFO L186 Difference]: Start difference. First operand has 480 places, 920 transitions, 30963 flow. Second operand 44 states and 2542 transitions. [2021-10-13 22:47:07,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 1001 transitions, 36729 flow [2021-10-13 22:47:07,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 1001 transitions, 36436 flow, removed 42 selfloop flow, removed 16 redundant places. [2021-10-13 22:47:07,897 INFO L242 Difference]: Finished difference. Result has 517 places, 969 transitions, 34931 flow [2021-10-13 22:47:07,898 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=30749, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=920, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=705, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=34931, PETRI_PLACES=517, PETRI_TRANSITIONS=969} [2021-10-13 22:47:07,898 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 449 predicate places. [2021-10-13 22:47:07,898 INFO L470 AbstractCegarLoop]: Abstraction has has 517 places, 969 transitions, 34931 flow [2021-10-13 22:47:07,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 56.095238095238095) internal successors, (1178), 21 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:07,898 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:07,899 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1] [2021-10-13 22:47:07,918 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 22:47:08,117 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,SelfDestructingSolverStorable43 [2021-10-13 22:47:08,118 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:08,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:08,118 INFO L82 PathProgramCache]: Analyzing trace with hash -2110364218, now seen corresponding path program 17 times [2021-10-13 22:47:08,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:08,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130625129] [2021-10-13 22:47:08,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:08,118 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:08,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:08,223 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:08,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:08,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130625129] [2021-10-13 22:47:08,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130625129] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:08,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785797190] [2021-10-13 22:47:08,223 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:47:08,223 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:08,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:08,224 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 22:47:08,226 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 22:47:09,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-13 22:47:09,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:09,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:47:09,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:09,988 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:09,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785797190] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:09,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:09,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-10-13 22:47:09,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084315406] [2021-10-13 22:47:09,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 22:47:09,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:09,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 22:47:09,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-10-13 22:47:09,990 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:47:09,990 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 969 transitions, 34931 flow. Second operand has 20 states, 20 states have (on average 56.1) internal successors, (1122), 20 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 22:47:09,990 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:09,991 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:47:09,991 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:11,645 INFO L129 PetriNetUnfolder]: 676/4969 cut-off events. [2021-10-13 22:47:11,645 INFO L130 PetriNetUnfolder]: For 134640/135121 co-relation queries the response was YES. [2021-10-13 22:47:11,693 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29939 conditions, 4969 events. 676/4969 cut-off events. For 134640/135121 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 59362 event pairs, 0 based on Foata normal form. 60/4501 useless extension candidates. Maximal degree in co-relation 29742. Up to 1031 conditions per place. [2021-10-13 22:47:11,713 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 666 selfloop transitions, 314 changer transitions 11/1037 dead transitions. [2021-10-13 22:47:11,713 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 1037 transitions, 40406 flow [2021-10-13 22:47:11,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-13 22:47:11,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-10-13 22:47:11,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2080 transitions. [2021-10-13 22:47:11,714 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8496732026143791 [2021-10-13 22:47:11,714 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2080 transitions. [2021-10-13 22:47:11,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2080 transitions. [2021-10-13 22:47:11,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:11,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2080 transitions. [2021-10-13 22:47:11,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 57.77777777777778) internal successors, (2080), 36 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:11,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 68.0) internal successors, (2516), 37 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:11,767 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 68.0) internal successors, (2516), 37 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:11,767 INFO L186 Difference]: Start difference. First operand has 517 places, 969 transitions, 34931 flow. Second operand 36 states and 2080 transitions. [2021-10-13 22:47:11,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 1037 transitions, 40406 flow [2021-10-13 22:47:12,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 1037 transitions, 39083 flow, removed 531 selfloop flow, removed 32 redundant places. [2021-10-13 22:47:12,551 INFO L242 Difference]: Finished difference. Result has 521 places, 1018 transitions, 36659 flow [2021-10-13 22:47:12,551 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=33620, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=969, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=694, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=36659, PETRI_PLACES=521, PETRI_TRANSITIONS=1018} [2021-10-13 22:47:12,552 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 453 predicate places. [2021-10-13 22:47:12,552 INFO L470 AbstractCegarLoop]: Abstraction has has 521 places, 1018 transitions, 36659 flow [2021-10-13 22:47:12,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 56.1) internal successors, (1122), 20 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 22:47:12,552 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:12,552 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 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 22:47:12,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-10-13 22:47:12,767 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,SelfDestructingSolverStorable44 [2021-10-13 22:47:12,767 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:12,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:12,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1199373432, now seen corresponding path program 16 times [2021-10-13 22:47:12,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:12,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309059861] [2021-10-13 22:47:12,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:12,768 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:12,881 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:12,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:12,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309059861] [2021-10-13 22:47:12,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309059861] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:12,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000950711] [2021-10-13 22:47:12,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:47:12,881 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:12,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:12,882 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 22:47:12,883 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 22:47:14,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:47:14,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:14,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:47:14,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:14,644 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:14,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000950711] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:14,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:14,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-13 22:47:14,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245279259] [2021-10-13 22:47:14,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:47:14,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:14,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:47:14,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:47:14,645 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:47:14,646 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 1018 transitions, 36659 flow. Second operand has 21 states, 21 states have (on average 56.095238095238095) internal successors, (1178), 21 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:14,646 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:14,646 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:47:14,646 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:15,970 INFO L129 PetriNetUnfolder]: 676/4992 cut-off events. [2021-10-13 22:47:15,971 INFO L130 PetriNetUnfolder]: For 124340/124862 co-relation queries the response was YES. [2021-10-13 22:47:16,015 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29655 conditions, 4992 events. 676/4992 cut-off events. For 124340/124862 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 59769 event pairs, 0 based on Foata normal form. 32/4493 useless extension candidates. Maximal degree in co-relation 29458. Up to 1119 conditions per place. [2021-10-13 22:47:16,033 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 876 selfloop transitions, 140 changer transitions 5/1067 dead transitions. [2021-10-13 22:47:16,033 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 1067 transitions, 40267 flow [2021-10-13 22:47:16,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 22:47:16,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-13 22:47:16,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1380 transitions. [2021-10-13 22:47:16,034 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8455882352941176 [2021-10-13 22:47:16,034 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1380 transitions. [2021-10-13 22:47:16,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1380 transitions. [2021-10-13 22:47:16,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:16,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1380 transitions. [2021-10-13 22:47:16,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 57.5) internal successors, (1380), 24 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:16,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 68.0) internal successors, (1700), 25 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:16,036 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 68.0) internal successors, (1700), 25 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:16,036 INFO L186 Difference]: Start difference. First operand has 521 places, 1018 transitions, 36659 flow. Second operand 24 states and 1380 transitions. [2021-10-13 22:47:16,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 1067 transitions, 40267 flow [2021-10-13 22:47:16,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 1067 transitions, 39406 flow, removed 263 selfloop flow, removed 28 redundant places. [2021-10-13 22:47:16,776 INFO L242 Difference]: Finished difference. Result has 516 places, 1024 transitions, 36411 flow [2021-10-13 22:47:16,777 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=35834, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1018, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=878, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=36411, PETRI_PLACES=516, PETRI_TRANSITIONS=1024} [2021-10-13 22:47:16,777 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 448 predicate places. [2021-10-13 22:47:16,777 INFO L470 AbstractCegarLoop]: Abstraction has has 516 places, 1024 transitions, 36411 flow [2021-10-13 22:47:16,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 56.095238095238095) internal successors, (1178), 21 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:16,777 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:16,777 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 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 22:47:16,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-10-13 22:47:16,981 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,SelfDestructingSolverStorable45 [2021-10-13 22:47:16,982 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:16,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:16,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1263278282, now seen corresponding path program 17 times [2021-10-13 22:47:16,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:16,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172789939] [2021-10-13 22:47:16,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:16,982 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:17,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:17,090 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:17,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:17,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172789939] [2021-10-13 22:47:17,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172789939] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:17,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645112097] [2021-10-13 22:47:17,091 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:47:17,092 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:17,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:17,093 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 22:47:17,094 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 22:47:18,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 22:47:18,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:18,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:47:18,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:19,063 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:19,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645112097] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:19,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:19,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-13 22:47:19,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493255657] [2021-10-13 22:47:19,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:47:19,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:19,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:47:19,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:47:19,064 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:47:19,065 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 1024 transitions, 36411 flow. Second operand has 21 states, 21 states have (on average 56.095238095238095) internal successors, (1178), 21 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:19,065 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:19,065 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:47:19,065 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:20,642 INFO L129 PetriNetUnfolder]: 688/5100 cut-off events. [2021-10-13 22:47:20,642 INFO L130 PetriNetUnfolder]: For 125596/126076 co-relation queries the response was YES. [2021-10-13 22:47:20,693 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30044 conditions, 5100 events. 688/5100 cut-off events. For 125596/126076 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 61460 event pairs, 0 based on Foata normal form. 32/4589 useless extension candidates. Maximal degree in co-relation 29847. Up to 1086 conditions per place. [2021-10-13 22:47:20,712 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 860 selfloop transitions, 196 changer transitions 5/1107 dead transitions. [2021-10-13 22:47:20,712 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 1107 transitions, 41243 flow [2021-10-13 22:47:20,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 22:47:20,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-10-13 22:47:20,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1722 transitions. [2021-10-13 22:47:20,713 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8441176470588235 [2021-10-13 22:47:20,713 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1722 transitions. [2021-10-13 22:47:20,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1722 transitions. [2021-10-13 22:47:20,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:20,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1722 transitions. [2021-10-13 22:47:20,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 57.4) internal successors, (1722), 30 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:20,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 68.0) internal successors, (2108), 31 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:20,716 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 68.0) internal successors, (2108), 31 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:20,716 INFO L186 Difference]: Start difference. First operand has 516 places, 1024 transitions, 36411 flow. Second operand 30 states and 1722 transitions. [2021-10-13 22:47:20,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 1107 transitions, 41243 flow [2021-10-13 22:47:21,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 1107 transitions, 41026 flow, removed 17 selfloop flow, removed 18 redundant places. [2021-10-13 22:47:21,543 INFO L242 Difference]: Finished difference. Result has 532 places, 1046 transitions, 37649 flow [2021-10-13 22:47:21,543 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=36207, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1024, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=831, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=37649, PETRI_PLACES=532, PETRI_TRANSITIONS=1046} [2021-10-13 22:47:21,543 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 464 predicate places. [2021-10-13 22:47:21,543 INFO L470 AbstractCegarLoop]: Abstraction has has 532 places, 1046 transitions, 37649 flow [2021-10-13 22:47:21,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 56.095238095238095) internal successors, (1178), 21 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:21,544 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:21,544 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 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 22:47:21,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-10-13 22:47:21,748 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,SelfDestructingSolverStorable46 [2021-10-13 22:47:21,748 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:21,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:21,749 INFO L82 PathProgramCache]: Analyzing trace with hash -516214854, now seen corresponding path program 18 times [2021-10-13 22:47:21,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:21,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282367407] [2021-10-13 22:47:21,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:21,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:21,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:21,848 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:21,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:21,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282367407] [2021-10-13 22:47:21,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282367407] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:21,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059560898] [2021-10-13 22:47:21,848 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:47:21,848 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:21,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:21,849 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 22:47:21,850 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 22:47:23,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-13 22:47:23,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:23,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:47:23,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:23,787 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:23,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059560898] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:23,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:23,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-13 22:47:23,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712524595] [2021-10-13 22:47:23,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:47:23,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:23,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:47:23,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:47:23,788 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:47:23,788 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 1046 transitions, 37649 flow. Second operand has 21 states, 21 states have (on average 56.095238095238095) internal successors, (1178), 21 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:23,789 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:23,789 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:47:23,789 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:25,193 INFO L129 PetriNetUnfolder]: 692/5129 cut-off events. [2021-10-13 22:47:25,194 INFO L130 PetriNetUnfolder]: For 131237/131694 co-relation queries the response was YES. [2021-10-13 22:47:25,249 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30417 conditions, 5129 events. 692/5129 cut-off events. For 131237/131694 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 61848 event pairs, 0 based on Foata normal form. 32/4616 useless extension candidates. Maximal degree in co-relation 30215. Up to 1111 conditions per place. [2021-10-13 22:47:25,270 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 857 selfloop transitions, 181 changer transitions 5/1089 dead transitions. [2021-10-13 22:47:25,270 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 1089 transitions, 41149 flow [2021-10-13 22:47:25,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-13 22:47:25,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-10-13 22:47:25,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1438 transitions. [2021-10-13 22:47:25,271 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8458823529411764 [2021-10-13 22:47:25,271 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1438 transitions. [2021-10-13 22:47:25,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1438 transitions. [2021-10-13 22:47:25,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:25,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1438 transitions. [2021-10-13 22:47:25,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 57.52) internal successors, (1438), 25 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:25,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 68.0) internal successors, (1768), 26 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:25,274 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 68.0) internal successors, (1768), 26 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:25,274 INFO L186 Difference]: Start difference. First operand has 532 places, 1046 transitions, 37649 flow. Second operand 25 states and 1438 transitions. [2021-10-13 22:47:25,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 1089 transitions, 41149 flow [2021-10-13 22:47:26,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 1089 transitions, 40910 flow, removed 13 selfloop flow, removed 20 redundant places. [2021-10-13 22:47:26,190 INFO L242 Difference]: Finished difference. Result has 538 places, 1052 transitions, 38133 flow [2021-10-13 22:47:26,191 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=37420, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1046, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=865, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=38133, PETRI_PLACES=538, PETRI_TRANSITIONS=1052} [2021-10-13 22:47:26,191 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 470 predicate places. [2021-10-13 22:47:26,191 INFO L470 AbstractCegarLoop]: Abstraction has has 538 places, 1052 transitions, 38133 flow [2021-10-13 22:47:26,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 56.095238095238095) internal successors, (1178), 21 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:26,191 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:26,191 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 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 22:47:26,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-10-13 22:47:26,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:26,404 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:26,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:26,404 INFO L82 PathProgramCache]: Analyzing trace with hash -821086544, now seen corresponding path program 19 times [2021-10-13 22:47:26,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:26,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015848415] [2021-10-13 22:47:26,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:26,404 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:26,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:26,504 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:26,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:26,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015848415] [2021-10-13 22:47:26,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015848415] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:26,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900129926] [2021-10-13 22:47:26,505 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:47:26,505 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:26,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:26,505 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 22:47:26,506 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 22:47:28,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:28,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:47:28,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:28,483 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:28,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900129926] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:28,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:28,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-13 22:47:28,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288730674] [2021-10-13 22:47:28,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:47:28,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:28,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:47:28,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:47:28,484 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:47:28,485 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 1052 transitions, 38133 flow. Second operand has 21 states, 21 states have (on average 56.095238095238095) internal successors, (1178), 21 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:28,485 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:28,485 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:47:28,485 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:30,549 INFO L129 PetriNetUnfolder]: 731/5402 cut-off events. [2021-10-13 22:47:30,549 INFO L130 PetriNetUnfolder]: For 157332/157862 co-relation queries the response was YES. [2021-10-13 22:47:30,612 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32622 conditions, 5402 events. 731/5402 cut-off events. For 157332/157862 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 65846 event pairs, 0 based on Foata normal form. 152/4979 useless extension candidates. Maximal degree in co-relation 32418. Up to 839 conditions per place. [2021-10-13 22:47:30,633 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 154 selfloop transitions, 925 changer transitions 17/1142 dead transitions. [2021-10-13 22:47:30,633 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 589 places, 1142 transitions, 44593 flow [2021-10-13 22:47:30,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-13 22:47:30,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-10-13 22:47:30,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3116 transitions. [2021-10-13 22:47:30,635 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8485838779956427 [2021-10-13 22:47:30,635 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3116 transitions. [2021-10-13 22:47:30,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3116 transitions. [2021-10-13 22:47:30,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:30,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3116 transitions. [2021-10-13 22:47:30,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 57.7037037037037) internal successors, (3116), 54 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:30,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 68.0) internal successors, (3740), 55 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:30,639 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 68.0) internal successors, (3740), 55 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:30,639 INFO L186 Difference]: Start difference. First operand has 538 places, 1052 transitions, 38133 flow. Second operand 54 states and 3116 transitions. [2021-10-13 22:47:30,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 589 places, 1142 transitions, 44593 flow [2021-10-13 22:47:31,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 567 places, 1142 transitions, 44318 flow, removed 22 selfloop flow, removed 22 redundant places. [2021-10-13 22:47:31,706 INFO L242 Difference]: Finished difference. Result has 579 places, 1104 transitions, 42703 flow [2021-10-13 22:47:31,707 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=37894, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1052, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=879, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=42703, PETRI_PLACES=579, PETRI_TRANSITIONS=1104} [2021-10-13 22:47:31,707 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 511 predicate places. [2021-10-13 22:47:31,707 INFO L470 AbstractCegarLoop]: Abstraction has has 579 places, 1104 transitions, 42703 flow [2021-10-13 22:47:31,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 56.095238095238095) internal successors, (1178), 21 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:31,707 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:31,707 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 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 22:47:31,728 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 22:47:31,919 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,SelfDestructingSolverStorable48 [2021-10-13 22:47:31,919 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:31,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:31,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1950777976, now seen corresponding path program 20 times [2021-10-13 22:47:31,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:31,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945415615] [2021-10-13 22:47:31,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:31,919 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:31,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:32,033 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:32,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:32,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945415615] [2021-10-13 22:47:32,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945415615] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:32,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085646856] [2021-10-13 22:47:32,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:47:32,034 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:32,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:32,034 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 22:47:32,035 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 22:47:33,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:47:33,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:33,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:47:33,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:33,992 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:33,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085646856] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:33,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:33,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-13 22:47:33,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15514441] [2021-10-13 22:47:33,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:47:33,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:33,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:47:33,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:47:33,993 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:47:33,994 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 579 places, 1104 transitions, 42703 flow. Second operand has 21 states, 21 states have (on average 56.095238095238095) internal successors, (1178), 21 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:33,994 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:33,994 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:47:33,994 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:35,502 INFO L129 PetriNetUnfolder]: 727/5405 cut-off events. [2021-10-13 22:47:35,502 INFO L130 PetriNetUnfolder]: For 156454/156970 co-relation queries the response was YES. [2021-10-13 22:47:35,561 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33769 conditions, 5405 events. 727/5405 cut-off events. For 156454/156970 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 66052 event pairs, 0 based on Foata normal form. 32/4861 useless extension candidates. Maximal degree in co-relation 33555. Up to 1146 conditions per place. [2021-10-13 22:47:35,585 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 879 selfloop transitions, 213 changer transitions 5/1143 dead transitions. [2021-10-13 22:47:35,585 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 598 places, 1143 transitions, 46386 flow [2021-10-13 22:47:35,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 22:47:35,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-10-13 22:47:35,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1496 transitions. [2021-10-13 22:47:35,586 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8461538461538461 [2021-10-13 22:47:35,586 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1496 transitions. [2021-10-13 22:47:35,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1496 transitions. [2021-10-13 22:47:35,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:35,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1496 transitions. [2021-10-13 22:47:35,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 57.53846153846154) internal successors, (1496), 26 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 22:47:35,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 68.0) internal successors, (1836), 27 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:35,588 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 68.0) internal successors, (1836), 27 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:35,588 INFO L186 Difference]: Start difference. First operand has 579 places, 1104 transitions, 42703 flow. Second operand 26 states and 1496 transitions. [2021-10-13 22:47:35,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 598 places, 1143 transitions, 46386 flow [2021-10-13 22:47:36,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 560 places, 1143 transitions, 44974 flow, removed 482 selfloop flow, removed 38 redundant places. [2021-10-13 22:47:36,868 INFO L242 Difference]: Finished difference. Result has 564 places, 1109 transitions, 42148 flow [2021-10-13 22:47:36,869 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=41353, PETRI_DIFFERENCE_MINUEND_PLACES=535, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=891, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=42148, PETRI_PLACES=564, PETRI_TRANSITIONS=1109} [2021-10-13 22:47:36,869 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 496 predicate places. [2021-10-13 22:47:36,869 INFO L470 AbstractCegarLoop]: Abstraction has has 564 places, 1109 transitions, 42148 flow [2021-10-13 22:47:36,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 56.095238095238095) internal successors, (1178), 21 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:36,869 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:36,869 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 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 22:47:36,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-10-13 22:47:37,083 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,SelfDestructingSolverStorable49 [2021-10-13 22:47:37,084 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:37,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:37,084 INFO L82 PathProgramCache]: Analyzing trace with hash -463951144, now seen corresponding path program 21 times [2021-10-13 22:47:37,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:37,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626363738] [2021-10-13 22:47:37,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:37,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:37,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:37,176 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:37,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:37,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626363738] [2021-10-13 22:47:37,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626363738] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:37,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188194623] [2021-10-13 22:47:37,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:47:37,176 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:37,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:37,189 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 22:47:37,190 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 22:47:38,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-13 22:47:38,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:38,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:47:38,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:39,270 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:39,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188194623] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:39,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:39,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-13 22:47:39,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455090149] [2021-10-13 22:47:39,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:47:39,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:39,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:47:39,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:47:39,272 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:47:39,272 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 564 places, 1109 transitions, 42148 flow. Second operand has 21 states, 21 states have (on average 56.095238095238095) internal successors, (1178), 21 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:39,272 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:39,272 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:47:39,272 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:40,982 INFO L129 PetriNetUnfolder]: 733/5438 cut-off events. [2021-10-13 22:47:40,982 INFO L130 PetriNetUnfolder]: For 155203/155768 co-relation queries the response was YES. [2021-10-13 22:47:41,127 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33644 conditions, 5438 events. 733/5438 cut-off events. For 155203/155768 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 66485 event pairs, 0 based on Foata normal form. 46/4905 useless extension candidates. Maximal degree in co-relation 33431. Up to 1038 conditions per place. [2021-10-13 22:47:41,149 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 757 selfloop transitions, 345 changer transitions 5/1153 dead transitions. [2021-10-13 22:47:41,150 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 589 places, 1153 transitions, 46007 flow [2021-10-13 22:47:41,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 22:47:41,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-13 22:47:41,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1615 transitions. [2021-10-13 22:47:41,151 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8482142857142857 [2021-10-13 22:47:41,151 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1615 transitions. [2021-10-13 22:47:41,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1615 transitions. [2021-10-13 22:47:41,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:41,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1615 transitions. [2021-10-13 22:47:41,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 57.67857142857143) internal successors, (1615), 28 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:41,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 68.0) internal successors, (1972), 29 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:41,153 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 68.0) internal successors, (1972), 29 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:41,153 INFO L186 Difference]: Start difference. First operand has 564 places, 1109 transitions, 42148 flow. Second operand 28 states and 1615 transitions. [2021-10-13 22:47:41,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 589 places, 1153 transitions, 46007 flow [2021-10-13 22:47:42,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 566 places, 1153 transitions, 45655 flow, removed 13 selfloop flow, removed 23 redundant places. [2021-10-13 22:47:42,304 INFO L242 Difference]: Finished difference. Result has 569 places, 1115 transitions, 43011 flow [2021-10-13 22:47:42,305 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=41810, PETRI_DIFFERENCE_MINUEND_PLACES=539, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=764, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=43011, PETRI_PLACES=569, PETRI_TRANSITIONS=1115} [2021-10-13 22:47:42,305 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 501 predicate places. [2021-10-13 22:47:42,305 INFO L470 AbstractCegarLoop]: Abstraction has has 569 places, 1115 transitions, 43011 flow [2021-10-13 22:47:42,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 56.095238095238095) internal successors, (1178), 21 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:42,305 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:42,305 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 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 22:47:42,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-10-13 22:47:42,519 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,SelfDestructingSolverStorable50 [2021-10-13 22:47:42,519 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:42,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:42,520 INFO L82 PathProgramCache]: Analyzing trace with hash 2108284196, now seen corresponding path program 22 times [2021-10-13 22:47:42,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:42,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790079643] [2021-10-13 22:47:42,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:42,520 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:42,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:42,614 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:42,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:42,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790079643] [2021-10-13 22:47:42,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790079643] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:42,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674931917] [2021-10-13 22:47:42,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:47:42,615 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:42,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:42,616 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 22:47:42,617 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 22:47:44,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:47:44,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:44,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:47:44,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:44,776 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:44,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674931917] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:44,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:44,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-13 22:47:44,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142806070] [2021-10-13 22:47:44,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:47:44,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:44,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:47:44,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:47:44,777 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:47:44,778 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 569 places, 1115 transitions, 43011 flow. Second operand has 21 states, 21 states have (on average 56.095238095238095) internal successors, (1178), 21 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:44,778 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:44,778 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:47:44,778 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:46,670 INFO L129 PetriNetUnfolder]: 774/5700 cut-off events. [2021-10-13 22:47:46,670 INFO L130 PetriNetUnfolder]: For 186297/186947 co-relation queries the response was YES. [2021-10-13 22:47:46,737 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36247 conditions, 5700 events. 774/5700 cut-off events. For 186297/186947 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 70391 event pairs, 0 based on Foata normal form. 100/5194 useless extension candidates. Maximal degree in co-relation 36034. Up to 905 conditions per place. [2021-10-13 22:47:46,762 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 474 selfloop transitions, 669 changer transitions 17/1206 dead transitions. [2021-10-13 22:47:46,762 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 608 places, 1206 transitions, 50078 flow [2021-10-13 22:47:46,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-13 22:47:46,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-10-13 22:47:46,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2426 transitions. [2021-10-13 22:47:46,764 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8494397759103641 [2021-10-13 22:47:46,764 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2426 transitions. [2021-10-13 22:47:46,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2426 transitions. [2021-10-13 22:47:46,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:46,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2426 transitions. [2021-10-13 22:47:46,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 57.76190476190476) internal successors, (2426), 42 states have internal predecessors, (2426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:46,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 68.0) internal successors, (2924), 43 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:46,767 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 68.0) internal successors, (2924), 43 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:46,767 INFO L186 Difference]: Start difference. First operand has 569 places, 1115 transitions, 43011 flow. Second operand 42 states and 2426 transitions. [2021-10-13 22:47:46,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 608 places, 1206 transitions, 50078 flow [2021-10-13 22:47:47,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 583 places, 1206 transitions, 49517 flow, removed 48 selfloop flow, removed 25 redundant places. [2021-10-13 22:47:47,946 INFO L242 Difference]: Finished difference. Result has 595 places, 1165 transitions, 46860 flow [2021-10-13 22:47:47,947 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=42530, PETRI_DIFFERENCE_MINUEND_PLACES=542, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=625, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=46860, PETRI_PLACES=595, PETRI_TRANSITIONS=1165} [2021-10-13 22:47:47,947 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 527 predicate places. [2021-10-13 22:47:47,947 INFO L470 AbstractCegarLoop]: Abstraction has has 595 places, 1165 transitions, 46860 flow [2021-10-13 22:47:47,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 56.095238095238095) internal successors, (1178), 21 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:47,947 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:47,947 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 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 22:47:47,968 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 22:47:48,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:48,161 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:48,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:48,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1192171390, now seen corresponding path program 23 times [2021-10-13 22:47:48,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:48,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888238003] [2021-10-13 22:47:48,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:48,161 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:48,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:48,274 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:48,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:48,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888238003] [2021-10-13 22:47:48,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888238003] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:48,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492221410] [2021-10-13 22:47:48,275 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:47:48,275 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:48,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:48,281 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 22:47:48,282 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 22:47:50,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 22:47:50,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:50,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:47:50,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:50,396 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:50,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492221410] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:50,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:50,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-13 22:47:50,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466727042] [2021-10-13 22:47:50,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:47:50,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:50,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:47:50,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:47:50,398 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:47:50,398 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 595 places, 1165 transitions, 46860 flow. Second operand has 21 states, 21 states have (on average 56.095238095238095) internal successors, (1178), 21 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:50,398 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:50,398 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:47:50,398 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:52,514 INFO L129 PetriNetUnfolder]: 781/5809 cut-off events. [2021-10-13 22:47:52,514 INFO L130 PetriNetUnfolder]: For 180081/180751 co-relation queries the response was YES. [2021-10-13 22:47:52,674 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37314 conditions, 5809 events. 781/5809 cut-off events. For 180081/180751 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 72451 event pairs, 0 based on Foata normal form. 44/5234 useless extension candidates. Maximal degree in co-relation 37091. Up to 1110 conditions per place. [2021-10-13 22:47:52,699 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 848 selfloop transitions, 361 changer transitions 5/1260 dead transitions. [2021-10-13 22:47:52,700 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 630 places, 1260 transitions, 52566 flow [2021-10-13 22:47:52,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-13 22:47:52,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-10-13 22:47:52,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2410 transitions. [2021-10-13 22:47:52,701 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8438375350140056 [2021-10-13 22:47:52,701 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2410 transitions. [2021-10-13 22:47:52,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2410 transitions. [2021-10-13 22:47:52,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:52,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2410 transitions. [2021-10-13 22:47:52,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 57.38095238095238) internal successors, (2410), 42 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:52,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 68.0) internal successors, (2924), 43 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:52,704 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 68.0) internal successors, (2924), 43 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:52,704 INFO L186 Difference]: Start difference. First operand has 595 places, 1165 transitions, 46860 flow. Second operand 42 states and 2410 transitions. [2021-10-13 22:47:52,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 630 places, 1260 transitions, 52566 flow [2021-10-13 22:47:53,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 600 places, 1260 transitions, 51695 flow, removed 301 selfloop flow, removed 30 redundant places. [2021-10-13 22:47:54,016 INFO L242 Difference]: Finished difference. Result has 607 places, 1189 transitions, 48080 flow [2021-10-13 22:47:54,016 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=46011, PETRI_DIFFERENCE_MINUEND_PLACES=559, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=337, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=806, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=48080, PETRI_PLACES=607, PETRI_TRANSITIONS=1189} [2021-10-13 22:47:54,017 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 539 predicate places. [2021-10-13 22:47:54,017 INFO L470 AbstractCegarLoop]: Abstraction has has 607 places, 1189 transitions, 48080 flow [2021-10-13 22:47:54,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 56.095238095238095) internal successors, (1178), 21 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:54,017 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:54,017 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 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 22:47:54,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-10-13 22:47:54,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:54,231 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:54,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:54,232 INFO L82 PathProgramCache]: Analyzing trace with hash -2027015816, now seen corresponding path program 24 times [2021-10-13 22:47:54,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:54,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649589458] [2021-10-13 22:47:54,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:54,232 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:54,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:54,335 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:54,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:54,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649589458] [2021-10-13 22:47:54,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649589458] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:54,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043650463] [2021-10-13 22:47:54,340 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:47:54,340 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:54,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:54,340 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 22:47:54,341 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 22:47:56,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-13 22:47:56,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:56,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:47:56,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:56,541 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:56,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043650463] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:56,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:56,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-13 22:47:56,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627330115] [2021-10-13 22:47:56,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:47:56,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:56,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:47:56,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:47:56,542 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:47:56,543 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 607 places, 1189 transitions, 48080 flow. Second operand has 21 states, 21 states have (on average 56.095238095238095) internal successors, (1178), 21 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:56,543 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:56,543 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:47:56,543 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:58,751 INFO L129 PetriNetUnfolder]: 794/5919 cut-off events. [2021-10-13 22:47:58,751 INFO L130 PetriNetUnfolder]: For 184757/185383 co-relation queries the response was YES. [2021-10-13 22:47:58,820 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38110 conditions, 5919 events. 794/5919 cut-off events. For 184757/185383 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 74155 event pairs, 0 based on Foata normal form. 52/5341 useless extension candidates. Maximal degree in co-relation 37884. Up to 995 conditions per place. [2021-10-13 22:47:58,848 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 721 selfloop transitions, 504 changer transitions 5/1276 dead transitions. [2021-10-13 22:47:58,848 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 650 places, 1276 transitions, 53582 flow [2021-10-13 22:47:58,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-10-13 22:47:58,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-10-13 22:47:58,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2641 transitions. [2021-10-13 22:47:58,876 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.844309462915601 [2021-10-13 22:47:58,876 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2641 transitions. [2021-10-13 22:47:58,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2641 transitions. [2021-10-13 22:47:58,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:58,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2641 transitions. [2021-10-13 22:47:58,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 57.41304347826087) internal successors, (2641), 46 states have internal predecessors, (2641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:58,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 68.0) internal successors, (3196), 47 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:58,880 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 68.0) internal successors, (3196), 47 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:58,880 INFO L186 Difference]: Start difference. First operand has 607 places, 1189 transitions, 48080 flow. Second operand 46 states and 2641 transitions. [2021-10-13 22:47:58,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 650 places, 1276 transitions, 53582 flow [2021-10-13 22:48:00,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 616 places, 1276 transitions, 53097 flow, removed 33 selfloop flow, removed 34 redundant places. [2021-10-13 22:48:00,310 INFO L242 Difference]: Finished difference. Result has 622 places, 1207 transitions, 49855 flow [2021-10-13 22:48:00,311 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=47611, PETRI_DIFFERENCE_MINUEND_PLACES=571, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=486, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=686, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=49855, PETRI_PLACES=622, PETRI_TRANSITIONS=1207} [2021-10-13 22:48:00,311 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 554 predicate places. [2021-10-13 22:48:00,311 INFO L470 AbstractCegarLoop]: Abstraction has has 622 places, 1207 transitions, 49855 flow [2021-10-13 22:48:00,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 56.095238095238095) internal successors, (1178), 21 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:00,311 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:00,312 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 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 22:48:00,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-10-13 22:48:00,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:00,533 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:00,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:00,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1509761084, now seen corresponding path program 25 times [2021-10-13 22:48:00,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:00,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580101710] [2021-10-13 22:48:00,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:00,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:00,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:00,627 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:00,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:00,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580101710] [2021-10-13 22:48:00,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580101710] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:00,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842913136] [2021-10-13 22:48:00,628 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:48:00,628 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:00,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:00,630 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 22:48:00,658 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 22:48:02,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:02,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:48:02,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:48:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:02,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842913136] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:02,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:48:02,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-13 22:48:02,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287289877] [2021-10-13 22:48:02,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:48:02,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:02,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:48:02,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:48:02,825 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:48:02,826 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 622 places, 1207 transitions, 49855 flow. Second operand has 21 states, 21 states have (on average 56.095238095238095) internal successors, (1178), 21 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:02,826 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:02,826 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:48:02,826 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:05,507 INFO L129 PetriNetUnfolder]: 921/6901 cut-off events. [2021-10-13 22:48:05,507 INFO L130 PetriNetUnfolder]: For 246315/247094 co-relation queries the response was YES. [2021-10-13 22:48:05,586 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45434 conditions, 6901 events. 921/6901 cut-off events. For 246315/247094 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 88294 event pairs, 0 based on Foata normal form. 176/6340 useless extension candidates. Maximal degree in co-relation 45206. Up to 1151 conditions per place. [2021-10-13 22:48:05,615 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 178 selfloop transitions, 1162 changer transitions 22/1408 dead transitions. [2021-10-13 22:48:05,615 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 689 places, 1408 transitions, 62555 flow [2021-10-13 22:48:05,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-10-13 22:48:05,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-10-13 22:48:05,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 4038 transitions. [2021-10-13 22:48:05,617 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8483193277310924 [2021-10-13 22:48:05,617 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 4038 transitions. [2021-10-13 22:48:05,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 4038 transitions. [2021-10-13 22:48:05,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:05,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 4038 transitions. [2021-10-13 22:48:05,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 57.68571428571428) internal successors, (4038), 70 states have internal predecessors, (4038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:05,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 68.0) internal successors, (4828), 71 states have internal predecessors, (4828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:05,623 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 68.0) internal successors, (4828), 71 states have internal predecessors, (4828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:05,623 INFO L186 Difference]: Start difference. First operand has 622 places, 1207 transitions, 49855 flow. Second operand 70 states and 4038 transitions. [2021-10-13 22:48:05,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 689 places, 1408 transitions, 62555 flow [2021-10-13 22:48:07,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 653 places, 1408 transitions, 61872 flow, removed 34 selfloop flow, removed 36 redundant places. [2021-10-13 22:48:07,361 INFO L242 Difference]: Finished difference. Result has 669 places, 1367 transitions, 59825 flow [2021-10-13 22:48:07,362 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=49264, PETRI_DIFFERENCE_MINUEND_PLACES=584, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1014, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=59825, PETRI_PLACES=669, PETRI_TRANSITIONS=1367} [2021-10-13 22:48:07,362 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 601 predicate places. [2021-10-13 22:48:07,362 INFO L470 AbstractCegarLoop]: Abstraction has has 669 places, 1367 transitions, 59825 flow [2021-10-13 22:48:07,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 56.095238095238095) internal successors, (1178), 21 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:07,362 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:07,362 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 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 22:48:07,384 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 22:48:07,567 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,SelfDestructingSolverStorable54 [2021-10-13 22:48:07,567 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:07,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:07,568 INFO L82 PathProgramCache]: Analyzing trace with hash 2072913178, now seen corresponding path program 26 times [2021-10-13 22:48:07,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:07,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798138311] [2021-10-13 22:48:07,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:07,568 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:07,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:07,706 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:07,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:07,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798138311] [2021-10-13 22:48:07,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798138311] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:07,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534386837] [2021-10-13 22:48:07,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:48:07,707 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:07,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:07,707 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 22:48:07,708 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 22:48:09,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:48:09,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:48:09,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:48:09,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:48:09,979 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:09,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534386837] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:09,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:48:09,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-13 22:48:09,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132295639] [2021-10-13 22:48:09,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:48:09,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:09,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:48:09,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:48:09,981 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:48:09,981 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 669 places, 1367 transitions, 59825 flow. Second operand has 21 states, 21 states have (on average 56.095238095238095) internal successors, (1178), 21 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:09,981 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:09,981 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:48:09,981 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:12,512 INFO L129 PetriNetUnfolder]: 924/6982 cut-off events. [2021-10-13 22:48:12,513 INFO L130 PetriNetUnfolder]: For 244610/245332 co-relation queries the response was YES. [2021-10-13 22:48:12,601 INFO L84 FinitePrefix]: Finished finitePrefix Result has 47248 conditions, 6982 events. 924/6982 cut-off events. For 244610/245332 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 89833 event pairs, 0 based on Foata normal form. 48/6284 useless extension candidates. Maximal degree in co-relation 47007. Up to 1344 conditions per place. [2021-10-13 22:48:12,632 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 976 selfloop transitions, 405 changer transitions 5/1432 dead transitions. [2021-10-13 22:48:12,633 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 693 places, 1432 transitions, 65423 flow [2021-10-13 22:48:12,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-13 22:48:12,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-10-13 22:48:12,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1899 transitions. [2021-10-13 22:48:12,634 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8462566844919787 [2021-10-13 22:48:12,634 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1899 transitions. [2021-10-13 22:48:12,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1899 transitions. [2021-10-13 22:48:12,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:12,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1899 transitions. [2021-10-13 22:48:12,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 57.54545454545455) internal successors, (1899), 33 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:12,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 68.0) internal successors, (2312), 34 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:12,636 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 68.0) internal successors, (2312), 34 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:12,637 INFO L186 Difference]: Start difference. First operand has 669 places, 1367 transitions, 59825 flow. Second operand 33 states and 1899 transitions. [2021-10-13 22:48:12,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 693 places, 1432 transitions, 65423 flow [2021-10-13 22:48:14,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 644 places, 1432 transitions, 61619 flow, removed 1485 selfloop flow, removed 49 redundant places. [2021-10-13 22:48:14,681 INFO L242 Difference]: Finished difference. Result has 647 places, 1381 transitions, 58172 flow [2021-10-13 22:48:14,682 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=56191, PETRI_DIFFERENCE_MINUEND_PLACES=612, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=391, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=962, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=58172, PETRI_PLACES=647, PETRI_TRANSITIONS=1381} [2021-10-13 22:48:14,682 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 579 predicate places. [2021-10-13 22:48:14,682 INFO L470 AbstractCegarLoop]: Abstraction has has 647 places, 1381 transitions, 58172 flow [2021-10-13 22:48:14,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 56.095238095238095) internal successors, (1178), 21 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:14,682 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:14,682 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 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 22:48:14,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-10-13 22:48:14,902 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,SelfDestructingSolverStorable55 [2021-10-13 22:48:14,902 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:14,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:14,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1691618714, now seen corresponding path program 27 times [2021-10-13 22:48:14,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:14,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950452020] [2021-10-13 22:48:14,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:14,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:15,006 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:15,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:15,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950452020] [2021-10-13 22:48:15,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950452020] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:15,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641489087] [2021-10-13 22:48:15,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:48:15,007 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:15,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:15,008 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 22:48:15,008 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 22:48:17,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-13 22:48:17,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:48:17,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:48:17,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:48:17,392 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:17,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641489087] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:17,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:48:17,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-13 22:48:17,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916558248] [2021-10-13 22:48:17,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:48:17,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:17,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:48:17,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:48:17,393 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:48:17,394 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 647 places, 1381 transitions, 58172 flow. Second operand has 21 states, 21 states have (on average 56.095238095238095) internal successors, (1178), 21 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:17,394 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:17,394 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:48:17,394 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:20,306 INFO L129 PetriNetUnfolder]: 1000/7484 cut-off events. [2021-10-13 22:48:20,306 INFO L130 PetriNetUnfolder]: For 269974/270765 co-relation queries the response was YES. [2021-10-13 22:48:20,400 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49594 conditions, 7484 events. 1000/7484 cut-off events. For 269974/270765 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 97700 event pairs, 0 based on Foata normal form. 156/6842 useless extension candidates. Maximal degree in co-relation 49357. Up to 1253 conditions per place. [2021-10-13 22:48:20,562 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 404 selfloop transitions, 1074 changer transitions 17/1541 dead transitions. [2021-10-13 22:48:20,562 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 691 places, 1541 transitions, 68784 flow [2021-10-13 22:48:20,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-10-13 22:48:20,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-10-13 22:48:20,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2714 transitions. [2021-10-13 22:48:20,564 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8491864831038799 [2021-10-13 22:48:20,564 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2714 transitions. [2021-10-13 22:48:20,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2714 transitions. [2021-10-13 22:48:20,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:20,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2714 transitions. [2021-10-13 22:48:20,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 57.744680851063826) internal successors, (2714), 47 states have internal predecessors, (2714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:20,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 68.0) internal successors, (3264), 48 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:20,568 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 68.0) internal successors, (3264), 48 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:20,568 INFO L186 Difference]: Start difference. First operand has 647 places, 1381 transitions, 58172 flow. Second operand 47 states and 2714 transitions. [2021-10-13 22:48:20,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 691 places, 1541 transitions, 68784 flow [2021-10-13 22:48:22,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 669 places, 1541 transitions, 68238 flow, removed 36 selfloop flow, removed 22 redundant places. [2021-10-13 22:48:22,549 INFO L242 Difference]: Finished difference. Result has 682 places, 1486 transitions, 65583 flow [2021-10-13 22:48:22,549 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=57676, PETRI_DIFFERENCE_MINUEND_PLACES=623, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=975, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=65583, PETRI_PLACES=682, PETRI_TRANSITIONS=1486} [2021-10-13 22:48:22,549 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 614 predicate places. [2021-10-13 22:48:22,550 INFO L470 AbstractCegarLoop]: Abstraction has has 682 places, 1486 transitions, 65583 flow [2021-10-13 22:48:22,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 56.095238095238095) internal successors, (1178), 21 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:22,550 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:22,550 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, 1, 1] [2021-10-13 22:48:22,571 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 22:48:22,770 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,SelfDestructingSolverStorable56 [2021-10-13 22:48:22,771 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:22,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:22,771 INFO L82 PathProgramCache]: Analyzing trace with hash -418346310, now seen corresponding path program 28 times [2021-10-13 22:48:22,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:22,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884258082] [2021-10-13 22:48:22,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:22,771 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:22,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:22,866 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 22:48:22,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:22,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884258082] [2021-10-13 22:48:22,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884258082] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:22,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920245015] [2021-10-13 22:48:22,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:48:22,867 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:22,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:22,884 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 22:48:22,912 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 22:48:24,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:48:24,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:48:24,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:48:24,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:48:25,336 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 22:48:25,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920245015] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:25,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:48:25,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-13 22:48:25,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334551093] [2021-10-13 22:48:25,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:48:25,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:25,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:48:25,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:48:25,337 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:48:25,338 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 682 places, 1486 transitions, 65583 flow. Second operand has 21 states, 21 states have (on average 56.095238095238095) internal successors, (1178), 21 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:25,338 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:25,338 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:48:25,338 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:29,121 INFO L129 PetriNetUnfolder]: 1079/8050 cut-off events. [2021-10-13 22:48:29,121 INFO L130 PetriNetUnfolder]: For 316699/317688 co-relation queries the response was YES. [2021-10-13 22:48:29,221 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55475 conditions, 8050 events. 1079/8050 cut-off events. For 316699/317688 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 105527 event pairs, 0 based on Foata normal form. 200/7392 useless extension candidates. Maximal degree in co-relation 55227. Up to 1383 conditions per place. [2021-10-13 22:48:29,257 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 378 selfloop transitions, 1212 changer transitions 22/1658 dead transitions. [2021-10-13 22:48:29,258 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 742 places, 1658 transitions, 77642 flow [2021-10-13 22:48:29,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-10-13 22:48:29,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-10-13 22:48:29,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 3866 transitions. [2021-10-13 22:48:29,260 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8485513608428445 [2021-10-13 22:48:29,260 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 3866 transitions. [2021-10-13 22:48:29,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 3866 transitions. [2021-10-13 22:48:29,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:29,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 3866 transitions. [2021-10-13 22:48:29,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 57.701492537313435) internal successors, (3866), 67 states have internal predecessors, (3866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:29,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 68.0) internal successors, (4624), 68 states have internal predecessors, (4624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:29,265 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 68.0) internal successors, (4624), 68 states have internal predecessors, (4624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:29,265 INFO L186 Difference]: Start difference. First operand has 682 places, 1486 transitions, 65583 flow. Second operand 67 states and 3866 transitions. [2021-10-13 22:48:29,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 742 places, 1658 transitions, 77642 flow [2021-10-13 22:48:31,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 709 places, 1658 transitions, 76808 flow, removed 258 selfloop flow, removed 33 redundant places. [2021-10-13 22:48:31,740 INFO L242 Difference]: Finished difference. Result has 726 places, 1612 transitions, 74199 flow [2021-10-13 22:48:31,741 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=64765, PETRI_DIFFERENCE_MINUEND_PLACES=643, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=74199, PETRI_PLACES=726, PETRI_TRANSITIONS=1612} [2021-10-13 22:48:31,741 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 658 predicate places. [2021-10-13 22:48:31,741 INFO L470 AbstractCegarLoop]: Abstraction has has 726 places, 1612 transitions, 74199 flow [2021-10-13 22:48:31,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 56.095238095238095) internal successors, (1178), 21 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:31,741 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:31,741 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, 1, 1] [2021-10-13 22:48:31,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-10-13 22:48:31,962 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,SelfDestructingSolverStorable57 [2021-10-13 22:48:31,963 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:31,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:31,963 INFO L82 PathProgramCache]: Analyzing trace with hash -420530076, now seen corresponding path program 29 times [2021-10-13 22:48:31,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:31,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253765079] [2021-10-13 22:48:31,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:31,963 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:31,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:32,056 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 22:48:32,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:32,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253765079] [2021-10-13 22:48:32,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253765079] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:32,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123989410] [2021-10-13 22:48:32,057 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:48:32,057 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:32,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:32,058 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 22:48:32,059 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 22:48:34,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 22:48:34,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:48:34,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:48:34,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:48:34,503 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 22:48:34,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123989410] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:34,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:48:34,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-13 22:48:34,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739936881] [2021-10-13 22:48:34,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:48:34,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:34,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:48:34,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:48:34,505 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:48:34,505 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 726 places, 1612 transitions, 74199 flow. Second operand has 21 states, 21 states have (on average 56.095238095238095) internal successors, (1178), 21 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:34,505 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:34,505 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:48:34,505 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:38,379 INFO L129 PetriNetUnfolder]: 1125/8351 cut-off events. [2021-10-13 22:48:38,379 INFO L130 PetriNetUnfolder]: For 350438/351707 co-relation queries the response was YES. [2021-10-13 22:48:38,488 INFO L84 FinitePrefix]: Finished finitePrefix Result has 60033 conditions, 8351 events. 1125/8351 cut-off events. For 350438/351707 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 110282 event pairs, 0 based on Foata normal form. 214/7676 useless extension candidates. Maximal degree in co-relation 59774. Up to 1461 conditions per place. [2021-10-13 22:48:38,527 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 402 selfloop transitions, 1269 changer transitions 17/1734 dead transitions. [2021-10-13 22:48:38,528 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 776 places, 1734 transitions, 84827 flow [2021-10-13 22:48:38,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-10-13 22:48:38,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-10-13 22:48:38,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3404 transitions. [2021-10-13 22:48:38,529 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8484546360917248 [2021-10-13 22:48:38,529 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3404 transitions. [2021-10-13 22:48:38,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3404 transitions. [2021-10-13 22:48:38,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:38,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3404 transitions. [2021-10-13 22:48:38,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 57.69491525423729) internal successors, (3404), 59 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:38,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 68.0) internal successors, (4080), 60 states have internal predecessors, (4080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:38,534 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 68.0) internal successors, (4080), 60 states have internal predecessors, (4080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:38,534 INFO L186 Difference]: Start difference. First operand has 726 places, 1612 transitions, 74199 flow. Second operand 59 states and 3404 transitions. [2021-10-13 22:48:38,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 776 places, 1734 transitions, 84827 flow [2021-10-13 22:48:41,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 731 places, 1734 transitions, 82495 flow, removed 912 selfloop flow, removed 45 redundant places. [2021-10-13 22:48:41,938 INFO L242 Difference]: Finished difference. Result has 743 places, 1691 transitions, 80006 flow [2021-10-13 22:48:41,940 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=72257, PETRI_DIFFERENCE_MINUEND_PLACES=673, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=80006, PETRI_PLACES=743, PETRI_TRANSITIONS=1691} [2021-10-13 22:48:41,940 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 675 predicate places. [2021-10-13 22:48:41,940 INFO L470 AbstractCegarLoop]: Abstraction has has 743 places, 1691 transitions, 80006 flow [2021-10-13 22:48:41,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 56.095238095238095) internal successors, (1178), 21 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:41,940 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:41,940 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, 1, 1] [2021-10-13 22:48:41,963 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 22:48:42,140 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,SelfDestructingSolverStorable58 [2021-10-13 22:48:42,141 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:42,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:42,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1118317542, now seen corresponding path program 30 times [2021-10-13 22:48:42,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:42,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663665084] [2021-10-13 22:48:42,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:42,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:42,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:42,275 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 22:48:42,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:42,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663665084] [2021-10-13 22:48:42,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663665084] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:42,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141514527] [2021-10-13 22:48:42,275 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:48:42,275 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:42,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:42,287 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 22:48:42,288 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 22:48:44,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-13 22:48:44,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:48:44,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:48:44,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:48:44,509 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 22:48:44,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141514527] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:44,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:48:44,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-13 22:48:44,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766699763] [2021-10-13 22:48:44,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:48:44,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:44,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:48:44,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:48:44,511 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:48:44,512 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 743 places, 1691 transitions, 80006 flow. Second operand has 21 states, 21 states have (on average 56.095238095238095) internal successors, (1178), 21 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:44,512 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:44,512 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:48:44,512 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:48,779 INFO L129 PetriNetUnfolder]: 1167/8666 cut-off events. [2021-10-13 22:48:48,780 INFO L130 PetriNetUnfolder]: For 372974/374333 co-relation queries the response was YES. [2021-10-13 22:48:48,896 INFO L84 FinitePrefix]: Finished finitePrefix Result has 63638 conditions, 8666 events. 1167/8666 cut-off events. For 372974/374333 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 115441 event pairs, 0 based on Foata normal form. 210/7952 useless extension candidates. Maximal degree in co-relation 63375. Up to 1497 conditions per place. [2021-10-13 22:48:48,940 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 497 selfloop transitions, 1249 changer transitions 17/1809 dead transitions. [2021-10-13 22:48:48,940 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 789 places, 1809 transitions, 90517 flow [2021-10-13 22:48:48,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-10-13 22:48:48,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-10-13 22:48:48,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3059 transitions. [2021-10-13 22:48:48,942 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8487791342952276 [2021-10-13 22:48:48,942 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 3059 transitions. [2021-10-13 22:48:48,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 3059 transitions. [2021-10-13 22:48:48,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:48,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 3059 transitions. [2021-10-13 22:48:48,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 57.716981132075475) internal successors, (3059), 53 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:48,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 68.0) internal successors, (3672), 54 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:48,946 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 68.0) internal successors, (3672), 54 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:48,946 INFO L186 Difference]: Start difference. First operand has 743 places, 1691 transitions, 80006 flow. Second operand 53 states and 3059 transitions. [2021-10-13 22:48:48,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 789 places, 1809 transitions, 90517 flow [2021-10-13 22:48:52,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 748 places, 1809 transitions, 88942 flow, removed 489 selfloop flow, removed 41 redundant places. [2021-10-13 22:48:52,378 INFO L242 Difference]: Finished difference. Result has 760 places, 1757 transitions, 85899 flow [2021-10-13 22:48:52,379 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=78596, PETRI_DIFFERENCE_MINUEND_PLACES=696, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1691, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=85899, PETRI_PLACES=760, PETRI_TRANSITIONS=1757} [2021-10-13 22:48:52,379 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 692 predicate places. [2021-10-13 22:48:52,380 INFO L470 AbstractCegarLoop]: Abstraction has has 760 places, 1757 transitions, 85899 flow [2021-10-13 22:48:52,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 56.095238095238095) internal successors, (1178), 21 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:52,380 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:52,380 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1] [2021-10-13 22:48:52,401 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 22:48:52,595 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,SelfDestructingSolverStorable59 [2021-10-13 22:48:52,596 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:52,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:52,596 INFO L82 PathProgramCache]: Analyzing trace with hash -348406825, now seen corresponding path program 18 times [2021-10-13 22:48:52,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:52,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278039315] [2021-10-13 22:48:52,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:52,596 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:52,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:52,716 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:52,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:52,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278039315] [2021-10-13 22:48:52,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278039315] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:52,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537260381] [2021-10-13 22:48:52,717 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:48:52,717 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:52,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:52,718 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 22:48:52,718 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 22:48:54,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-10-13 22:48:54,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:48:54,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:48:54,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:48:55,235 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:55,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537260381] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:55,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:48:55,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-10-13 22:48:55,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68779864] [2021-10-13 22:48:55,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 22:48:55,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:55,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 22:48:55,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-10-13 22:48:55,236 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:48:55,237 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 760 places, 1757 transitions, 85899 flow. Second operand has 22 states, 22 states have (on average 56.09090909090909) internal successors, (1234), 22 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:55,237 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:55,237 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:48:55,237 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:58,861 INFO L129 PetriNetUnfolder]: 1160/8642 cut-off events. [2021-10-13 22:48:58,861 INFO L130 PetriNetUnfolder]: For 355291/356830 co-relation queries the response was YES. [2021-10-13 22:48:58,993 INFO L84 FinitePrefix]: Finished finitePrefix Result has 64584 conditions, 8642 events. 1160/8642 cut-off events. For 355291/356830 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 115092 event pairs, 0 based on Foata normal form. 62/7782 useless extension candidates. Maximal degree in co-relation 64316. Up to 2059 conditions per place. [2021-10-13 22:48:59,046 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 1621 selfloop transitions, 111 changer transitions 5/1783 dead transitions. [2021-10-13 22:48:59,046 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 769 places, 1783 transitions, 90744 flow [2021-10-13 22:48:59,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 22:48:59,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-13 22:48:59,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 924 transitions. [2021-10-13 22:48:59,049 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8492647058823529 [2021-10-13 22:48:59,049 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 924 transitions. [2021-10-13 22:48:59,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 924 transitions. [2021-10-13 22:48:59,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:59,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 924 transitions. [2021-10-13 22:48:59,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 57.75) internal successors, (924), 16 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:59,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 68.0) internal successors, (1156), 17 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:59,051 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 68.0) internal successors, (1156), 17 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:59,051 INFO L186 Difference]: Start difference. First operand has 760 places, 1757 transitions, 85899 flow. Second operand 16 states and 924 transitions. [2021-10-13 22:48:59,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 769 places, 1783 transitions, 90744 flow [2021-10-13 22:49:02,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 735 places, 1783 transitions, 89878 flow, removed 292 selfloop flow, removed 34 redundant places. [2021-10-13 22:49:02,683 INFO L242 Difference]: Finished difference. Result has 739 places, 1759 transitions, 85450 flow [2021-10-13 22:49:02,684 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=85045, PETRI_DIFFERENCE_MINUEND_PLACES=720, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1757, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=85450, PETRI_PLACES=739, PETRI_TRANSITIONS=1759} [2021-10-13 22:49:02,684 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 671 predicate places. [2021-10-13 22:49:02,684 INFO L470 AbstractCegarLoop]: Abstraction has has 739 places, 1759 transitions, 85450 flow [2021-10-13 22:49:02,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.09090909090909) internal successors, (1234), 22 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:02,684 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:02,684 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1] [2021-10-13 22:49:02,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-10-13 22:49:02,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:02,899 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:02,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:02,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1135343267, now seen corresponding path program 19 times [2021-10-13 22:49:02,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:02,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494230242] [2021-10-13 22:49:02,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:02,900 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:02,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:03,057 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:03,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:03,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494230242] [2021-10-13 22:49:03,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494230242] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:03,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36529463] [2021-10-13 22:49:03,057 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:49:03,058 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:03,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:03,058 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 22:49:03,059 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 22:49:05,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:05,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:49:05,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:05,669 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:05,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36529463] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:05,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:05,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-10-13 22:49:05,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103193769] [2021-10-13 22:49:05,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 22:49:05,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:05,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 22:49:05,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-10-13 22:49:05,670 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:49:05,671 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 739 places, 1759 transitions, 85450 flow. Second operand has 22 states, 22 states have (on average 56.09090909090909) internal successors, (1234), 22 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:05,671 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:05,671 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:49:05,671 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:09,134 INFO L129 PetriNetUnfolder]: 1161/8637 cut-off events. [2021-10-13 22:49:09,134 INFO L130 PetriNetUnfolder]: For 356773/358300 co-relation queries the response was YES. [2021-10-13 22:49:09,247 INFO L84 FinitePrefix]: Finished finitePrefix Result has 64414 conditions, 8637 events. 1161/8637 cut-off events. For 356773/358300 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 115004 event pairs, 0 based on Foata normal form. 62/7779 useless extension candidates. Maximal degree in co-relation 64147. Up to 2031 conditions per place. [2021-10-13 22:49:09,372 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 1591 selfloop transitions, 142 changer transitions 5/1784 dead transitions. [2021-10-13 22:49:09,373 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 753 places, 1784 transitions, 90266 flow [2021-10-13 22:49:09,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 22:49:09,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-13 22:49:09,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 982 transitions. [2021-10-13 22:49:09,374 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8494809688581315 [2021-10-13 22:49:09,374 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 982 transitions. [2021-10-13 22:49:09,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 982 transitions. [2021-10-13 22:49:09,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:09,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 982 transitions. [2021-10-13 22:49:09,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 57.76470588235294) internal successors, (982), 17 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:09,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 68.0) internal successors, (1224), 18 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:09,375 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 68.0) internal successors, (1224), 18 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:09,375 INFO L186 Difference]: Start difference. First operand has 739 places, 1759 transitions, 85450 flow. Second operand 17 states and 982 transitions. [2021-10-13 22:49:09,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 753 places, 1784 transitions, 90266 flow [2021-10-13 22:49:13,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 740 places, 1784 transitions, 90077 flow, removed 13 selfloop flow, removed 13 redundant places. [2021-10-13 22:49:13,102 INFO L242 Difference]: Finished difference. Result has 744 places, 1761 transitions, 85769 flow [2021-10-13 22:49:13,103 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=85271, PETRI_DIFFERENCE_MINUEND_PLACES=724, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1759, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=85769, PETRI_PLACES=744, PETRI_TRANSITIONS=1761} [2021-10-13 22:49:13,103 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 676 predicate places. [2021-10-13 22:49:13,103 INFO L470 AbstractCegarLoop]: Abstraction has has 744 places, 1761 transitions, 85769 flow [2021-10-13 22:49:13,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.09090909090909) internal successors, (1234), 22 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:13,103 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:13,103 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1] [2021-10-13 22:49:13,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-10-13 22:49:13,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:13,320 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:13,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:13,320 INFO L82 PathProgramCache]: Analyzing trace with hash -749479113, now seen corresponding path program 20 times [2021-10-13 22:49:13,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:13,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206105089] [2021-10-13 22:49:13,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:13,320 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:13,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:13,433 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:13,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:13,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206105089] [2021-10-13 22:49:13,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206105089] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:13,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889690252] [2021-10-13 22:49:13,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:49:13,434 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:13,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:13,435 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 22:49:13,435 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 22:49:15,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:49:15,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:15,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:49:15,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:16,088 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:16,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889690252] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:16,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:16,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-10-13 22:49:16,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355287340] [2021-10-13 22:49:16,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 22:49:16,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:16,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 22:49:16,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-10-13 22:49:16,089 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:49:16,090 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 744 places, 1761 transitions, 85769 flow. Second operand has 22 states, 22 states have (on average 56.09090909090909) internal successors, (1234), 22 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:16,090 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:16,090 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:49:16,090 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:20,191 INFO L129 PetriNetUnfolder]: 1191/8861 cut-off events. [2021-10-13 22:49:20,191 INFO L130 PetriNetUnfolder]: For 392297/393887 co-relation queries the response was YES. [2021-10-13 22:49:20,309 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66666 conditions, 8861 events. 1191/8861 cut-off events. For 392297/393887 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 118344 event pairs, 0 based on Foata normal form. 110/8026 useless extension candidates. Maximal degree in co-relation 66397. Up to 1917 conditions per place. [2021-10-13 22:49:20,353 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 1308 selfloop transitions, 450 changer transitions 11/1815 dead transitions. [2021-10-13 22:49:20,353 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 779 places, 1815 transitions, 93487 flow [2021-10-13 22:49:20,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-13 22:49:20,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-10-13 22:49:20,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2195 transitions. [2021-10-13 22:49:20,354 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8494582043343654 [2021-10-13 22:49:20,354 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2195 transitions. [2021-10-13 22:49:20,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2195 transitions. [2021-10-13 22:49:20,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:20,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2195 transitions. [2021-10-13 22:49:20,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 57.76315789473684) internal successors, (2195), 38 states have internal predecessors, (2195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:20,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 68.0) internal successors, (2652), 39 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:20,357 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 68.0) internal successors, (2652), 39 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:20,357 INFO L186 Difference]: Start difference. First operand has 744 places, 1761 transitions, 85769 flow. Second operand 38 states and 2195 transitions. [2021-10-13 22:49:20,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 779 places, 1815 transitions, 93487 flow [2021-10-13 22:49:24,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 765 places, 1815 transitions, 93215 flow, removed 33 selfloop flow, removed 14 redundant places. [2021-10-13 22:49:24,298 INFO L242 Difference]: Finished difference. Result has 772 places, 1800 transitions, 89121 flow [2021-10-13 22:49:24,299 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=85550, PETRI_DIFFERENCE_MINUEND_PLACES=728, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1761, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=417, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=89121, PETRI_PLACES=772, PETRI_TRANSITIONS=1800} [2021-10-13 22:49:24,299 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 704 predicate places. [2021-10-13 22:49:24,299 INFO L470 AbstractCegarLoop]: Abstraction has has 772 places, 1800 transitions, 89121 flow [2021-10-13 22:49:24,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.09090909090909) internal successors, (1234), 22 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:24,299 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:24,300 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1] [2021-10-13 22:49:24,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-10-13 22:49:24,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:24,520 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:24,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:24,520 INFO L82 PathProgramCache]: Analyzing trace with hash -42601001, now seen corresponding path program 21 times [2021-10-13 22:49:24,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:24,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466005310] [2021-10-13 22:49:24,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:24,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:24,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:24,622 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:24,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:24,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466005310] [2021-10-13 22:49:24,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466005310] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:24,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575864068] [2021-10-13 22:49:24,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:49:24,622 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:24,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:24,623 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 22:49:24,624 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 22:49:26,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-13 22:49:26,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:26,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:49:26,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:26,889 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:26,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575864068] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:26,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:26,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-10-13 22:49:26,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235201142] [2021-10-13 22:49:26,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 22:49:26,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:26,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 22:49:26,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-10-13 22:49:26,891 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:49:26,892 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 772 places, 1800 transitions, 89121 flow. Second operand has 22 states, 22 states have (on average 56.09090909090909) internal successors, (1234), 22 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:26,892 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:26,892 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:49:26,892 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:30,578 INFO L129 PetriNetUnfolder]: 1188/8857 cut-off events. [2021-10-13 22:49:30,578 INFO L130 PetriNetUnfolder]: For 380713/382373 co-relation queries the response was YES. [2021-10-13 22:49:30,702 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66910 conditions, 8857 events. 1188/8857 cut-off events. For 380713/382373 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 118335 event pairs, 0 based on Foata normal form. 60/7972 useless extension candidates. Maximal degree in co-relation 66636. Up to 2055 conditions per place. [2021-10-13 22:49:30,748 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 1600 selfloop transitions, 171 changer transitions 5/1822 dead transitions. [2021-10-13 22:49:30,748 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 785 places, 1822 transitions, 93982 flow [2021-10-13 22:49:30,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 22:49:30,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-10-13 22:49:30,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1040 transitions. [2021-10-13 22:49:30,749 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8496732026143791 [2021-10-13 22:49:30,749 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1040 transitions. [2021-10-13 22:49:30,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1040 transitions. [2021-10-13 22:49:30,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:30,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1040 transitions. [2021-10-13 22:49:30,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 57.77777777777778) internal successors, (1040), 18 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:30,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 68.0) internal successors, (1292), 19 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:30,751 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 68.0) internal successors, (1292), 19 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:30,751 INFO L186 Difference]: Start difference. First operand has 772 places, 1800 transitions, 89121 flow. Second operand 18 states and 1040 transitions. [2021-10-13 22:49:30,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 785 places, 1822 transitions, 93982 flow [2021-10-13 22:49:34,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 752 places, 1822 transitions, 92809 flow, removed 342 selfloop flow, removed 33 redundant places. [2021-10-13 22:49:34,505 INFO L242 Difference]: Finished difference. Result has 755 places, 1801 transitions, 88538 flow [2021-10-13 22:49:34,506 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=87993, PETRI_DIFFERENCE_MINUEND_PLACES=735, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1800, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=88538, PETRI_PLACES=755, PETRI_TRANSITIONS=1801} [2021-10-13 22:49:34,507 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 687 predicate places. [2021-10-13 22:49:34,507 INFO L470 AbstractCegarLoop]: Abstraction has has 755 places, 1801 transitions, 88538 flow [2021-10-13 22:49:34,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.09090909090909) internal successors, (1234), 22 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:34,507 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:34,507 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1] [2021-10-13 22:49:34,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-10-13 22:49:34,723 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,SelfDestructingSolverStorable63 [2021-10-13 22:49:34,723 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:34,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:34,724 INFO L82 PathProgramCache]: Analyzing trace with hash -794216739, now seen corresponding path program 22 times [2021-10-13 22:49:34,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:34,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694525613] [2021-10-13 22:49:34,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:34,724 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:34,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:34,866 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:34,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:34,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694525613] [2021-10-13 22:49:34,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694525613] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:34,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715764041] [2021-10-13 22:49:34,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:49:34,867 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:34,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:34,867 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 22:49:34,871 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 22:49:37,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:49:37,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:37,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:49:37,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:37,551 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:37,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715764041] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:37,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:37,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-10-13 22:49:37,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645774915] [2021-10-13 22:49:37,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 22:49:37,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:37,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 22:49:37,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-10-13 22:49:37,553 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:49:37,553 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 755 places, 1801 transitions, 88538 flow. Second operand has 22 states, 22 states have (on average 56.09090909090909) internal successors, (1234), 22 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:37,553 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:37,553 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:49:37,553 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:41,315 INFO L129 PetriNetUnfolder]: 1191/8877 cut-off events. [2021-10-13 22:49:41,315 INFO L130 PetriNetUnfolder]: For 380307/381838 co-relation queries the response was YES. [2021-10-13 22:49:41,437 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66819 conditions, 8877 events. 1191/8877 cut-off events. For 380307/381838 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 118696 event pairs, 0 based on Foata normal form. 60/7991 useless extension candidates. Maximal degree in co-relation 66547. Up to 2045 conditions per place. [2021-10-13 22:49:41,482 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 1588 selfloop transitions, 188 changer transitions 5/1827 dead transitions. [2021-10-13 22:49:41,483 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 771 places, 1827 transitions, 93528 flow [2021-10-13 22:49:41,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-13 22:49:41,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-13 22:49:41,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1098 transitions. [2021-10-13 22:49:41,484 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8498452012383901 [2021-10-13 22:49:41,484 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1098 transitions. [2021-10-13 22:49:41,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1098 transitions. [2021-10-13 22:49:41,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:41,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1098 transitions. [2021-10-13 22:49:41,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 57.78947368421053) internal successors, (1098), 19 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:41,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 68.0) internal successors, (1360), 20 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:41,485 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 68.0) internal successors, (1360), 20 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:41,485 INFO L186 Difference]: Start difference. First operand has 755 places, 1801 transitions, 88538 flow. Second operand 19 states and 1098 transitions. [2021-10-13 22:49:41,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 771 places, 1827 transitions, 93528 flow [2021-10-13 22:49:44,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 756 places, 1827 transitions, 93273 flow, removed 11 selfloop flow, removed 15 redundant places. [2021-10-13 22:49:45,052 INFO L242 Difference]: Finished difference. Result has 759 places, 1804 transitions, 89002 flow [2021-10-13 22:49:45,053 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=88293, PETRI_DIFFERENCE_MINUEND_PLACES=738, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1801, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=89002, PETRI_PLACES=759, PETRI_TRANSITIONS=1804} [2021-10-13 22:49:45,053 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 691 predicate places. [2021-10-13 22:49:45,053 INFO L470 AbstractCegarLoop]: Abstraction has has 759 places, 1804 transitions, 89002 flow [2021-10-13 22:49:45,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.09090909090909) internal successors, (1234), 22 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:45,053 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:45,054 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1] [2021-10-13 22:49:45,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-10-13 22:49:45,267 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,SelfDestructingSolverStorable64 [2021-10-13 22:49:45,267 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:45,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:45,268 INFO L82 PathProgramCache]: Analyzing trace with hash 249120887, now seen corresponding path program 23 times [2021-10-13 22:49:45,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:45,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450248608] [2021-10-13 22:49:45,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:45,268 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:45,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:45,377 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:45,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:45,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450248608] [2021-10-13 22:49:45,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450248608] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:45,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160654531] [2021-10-13 22:49:45,378 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:49:45,378 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:45,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:45,380 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 22:49:45,381 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 22:49:47,703 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-13 22:49:47,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:47,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:49:47,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:48,110 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:48,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160654531] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:48,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:48,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-13 22:49:48,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046738197] [2021-10-13 22:49:48,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:49:48,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:48,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:49:48,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:49:48,112 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:49:48,112 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 759 places, 1804 transitions, 89002 flow. Second operand has 23 states, 23 states have (on average 56.08695652173913) internal successors, (1290), 23 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:48,120 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:48,120 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:49:48,120 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:52,568 INFO L129 PetriNetUnfolder]: 1224/9105 cut-off events. [2021-10-13 22:49:52,568 INFO L130 PetriNetUnfolder]: For 434280/435853 co-relation queries the response was YES. [2021-10-13 22:49:52,708 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69513 conditions, 9105 events. 1224/9105 cut-off events. For 434280/435853 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 122100 event pairs, 0 based on Foata normal form. 172/8307 useless extension candidates. Maximal degree in co-relation 69240. Up to 1587 conditions per place. [2021-10-13 22:49:52,757 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 742 selfloop transitions, 1070 changer transitions 17/1875 dead transitions. [2021-10-13 22:49:52,758 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 802 places, 1875 transitions, 98162 flow [2021-10-13 22:49:52,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-10-13 22:49:52,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-10-13 22:49:52,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2657 transitions. [2021-10-13 22:49:52,760 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8494245524296675 [2021-10-13 22:49:52,760 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2657 transitions. [2021-10-13 22:49:52,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2657 transitions. [2021-10-13 22:49:52,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:52,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2657 transitions. [2021-10-13 22:49:52,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 57.76086956521739) internal successors, (2657), 46 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:52,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 68.0) internal successors, (3196), 47 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:52,765 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 68.0) internal successors, (3196), 47 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:52,765 INFO L186 Difference]: Start difference. First operand has 759 places, 1804 transitions, 89002 flow. Second operand 46 states and 2657 transitions. [2021-10-13 22:49:52,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 802 places, 1875 transitions, 98162 flow [2021-10-13 22:49:56,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 786 places, 1875 transitions, 97814 flow, removed 42 selfloop flow, removed 16 redundant places. [2021-10-13 22:49:56,744 INFO L242 Difference]: Finished difference. Result has 797 places, 1839 transitions, 94258 flow [2021-10-13 22:49:56,745 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=88736, PETRI_DIFFERENCE_MINUEND_PLACES=741, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1804, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1041, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=763, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=94258, PETRI_PLACES=797, PETRI_TRANSITIONS=1839} [2021-10-13 22:49:56,745 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 729 predicate places. [2021-10-13 22:49:56,745 INFO L470 AbstractCegarLoop]: Abstraction has has 797 places, 1839 transitions, 94258 flow [2021-10-13 22:49:56,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 56.08695652173913) internal successors, (1290), 23 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:56,745 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:56,746 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1] [2021-10-13 22:49:56,770 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 22:49:56,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:56,967 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:56,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:56,968 INFO L82 PathProgramCache]: Analyzing trace with hash -202856553, now seen corresponding path program 24 times [2021-10-13 22:49:56,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:56,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661927740] [2021-10-13 22:49:56,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:56,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:57,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:57,117 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:57,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:57,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661927740] [2021-10-13 22:49:57,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661927740] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:57,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246907139] [2021-10-13 22:49:57,118 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:49:57,121 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:57,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:57,132 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 22:49:57,137 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 22:49:59,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-10-13 22:49:59,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:59,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:49:59,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:59,924 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:59,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246907139] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:59,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:59,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-10-13 22:49:59,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975736798] [2021-10-13 22:49:59,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 22:49:59,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:59,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 22:49:59,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-10-13 22:49:59,926 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:49:59,926 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 797 places, 1839 transitions, 94258 flow. Second operand has 22 states, 22 states have (on average 56.09090909090909) internal successors, (1234), 22 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:59,926 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:59,926 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:49:59,926 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:50:04,655 INFO L129 PetriNetUnfolder]: 1243/9275 cut-off events. [2021-10-13 22:50:04,655 INFO L130 PetriNetUnfolder]: For 442748/444406 co-relation queries the response was YES. [2021-10-13 22:50:04,921 INFO L84 FinitePrefix]: Finished finitePrefix Result has 72214 conditions, 9275 events. 1243/9275 cut-off events. For 442748/444406 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 124658 event pairs, 0 based on Foata normal form. 105/8390 useless extension candidates. Maximal degree in co-relation 71932. Up to 1944 conditions per place. [2021-10-13 22:50:04,973 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 1348 selfloop transitions, 488 changer transitions 11/1893 dead transitions. [2021-10-13 22:50:04,974 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 822 places, 1893 transitions, 101939 flow [2021-10-13 22:50:04,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 22:50:04,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-10-13 22:50:04,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1850 transitions. [2021-10-13 22:50:04,975 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8501838235294118 [2021-10-13 22:50:04,975 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1850 transitions. [2021-10-13 22:50:04,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1850 transitions. [2021-10-13 22:50:04,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:50:04,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1850 transitions. [2021-10-13 22:50:04,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 57.8125) internal successors, (1850), 32 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:04,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 68.0) internal successors, (2244), 33 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 22:50:04,978 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 68.0) internal successors, (2244), 33 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 22:50:04,978 INFO L186 Difference]: Start difference. First operand has 797 places, 1839 transitions, 94258 flow. Second operand 32 states and 1850 transitions. [2021-10-13 22:50:04,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 822 places, 1893 transitions, 101939 flow [2021-10-13 22:50:09,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 786 places, 1893 transitions, 100313 flow, removed 572 selfloop flow, removed 36 redundant places. [2021-10-13 22:50:09,520 INFO L242 Difference]: Finished difference. Result has 795 places, 1871 transitions, 96134 flow [2021-10-13 22:50:09,521 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=92702, PETRI_DIFFERENCE_MINUEND_PLACES=755, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1839, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=461, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=96134, PETRI_PLACES=795, PETRI_TRANSITIONS=1871} [2021-10-13 22:50:09,522 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 727 predicate places. [2021-10-13 22:50:09,522 INFO L470 AbstractCegarLoop]: Abstraction has has 795 places, 1871 transitions, 96134 flow [2021-10-13 22:50:09,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.09090909090909) internal successors, (1234), 22 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:09,522 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:50:09,522 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 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 22:50:09,545 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 22:50:09,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:09,743 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:50:09,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:50:09,744 INFO L82 PathProgramCache]: Analyzing trace with hash -932194955, now seen corresponding path program 31 times [2021-10-13 22:50:09,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:50:09,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593489467] [2021-10-13 22:50:09,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:50:09,744 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:50:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:50:09,895 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:09,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:50:09,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593489467] [2021-10-13 22:50:09,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593489467] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:09,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885850664] [2021-10-13 22:50:09,896 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:50:09,896 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:09,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:50:09,912 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 22:50:09,913 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 22:50:12,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:50:12,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:50:12,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:50:12,800 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:12,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885850664] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:12,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:50:12,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-10-13 22:50:12,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351292482] [2021-10-13 22:50:12,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 22:50:12,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:50:12,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 22:50:12,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-10-13 22:50:12,801 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:50:12,802 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 795 places, 1871 transitions, 96134 flow. Second operand has 22 states, 22 states have (on average 56.09090909090909) internal successors, (1234), 22 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:12,802 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:50:12,802 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:50:12,802 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:50:17,405 INFO L129 PetriNetUnfolder]: 1252/9372 cut-off events. [2021-10-13 22:50:17,405 INFO L130 PetriNetUnfolder]: For 423539/425249 co-relation queries the response was YES. [2021-10-13 22:50:17,633 INFO L84 FinitePrefix]: Finished finitePrefix Result has 72702 conditions, 9372 events. 1252/9372 cut-off events. For 423539/425249 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 126366 event pairs, 0 based on Foata normal form. 63/8434 useless extension candidates. Maximal degree in co-relation 72417. Up to 2071 conditions per place. [2021-10-13 22:50:17,682 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 1672 selfloop transitions, 276 changer transitions 5/1999 dead transitions. [2021-10-13 22:50:17,683 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 820 places, 1999 transitions, 105569 flow [2021-10-13 22:50:17,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 22:50:17,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-10-13 22:50:17,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1722 transitions. [2021-10-13 22:50:17,685 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8441176470588235 [2021-10-13 22:50:17,685 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1722 transitions. [2021-10-13 22:50:17,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1722 transitions. [2021-10-13 22:50:17,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:50:17,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1722 transitions. [2021-10-13 22:50:17,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 57.4) internal successors, (1722), 30 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:17,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 68.0) internal successors, (2108), 31 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:17,688 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 68.0) internal successors, (2108), 31 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:17,688 INFO L186 Difference]: Start difference. First operand has 795 places, 1871 transitions, 96134 flow. Second operand 30 states and 1722 transitions. [2021-10-13 22:50:17,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 820 places, 1999 transitions, 105569 flow [2021-10-13 22:50:21,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 795 places, 1999 transitions, 104752 flow, removed 223 selfloop flow, removed 25 redundant places. [2021-10-13 22:50:22,050 INFO L242 Difference]: Finished difference. Result has 801 places, 1891 transitions, 97384 flow [2021-10-13 22:50:22,051 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=95363, PETRI_DIFFERENCE_MINUEND_PLACES=766, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1871, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=97384, PETRI_PLACES=801, PETRI_TRANSITIONS=1891} [2021-10-13 22:50:22,051 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 733 predicate places. [2021-10-13 22:50:22,051 INFO L470 AbstractCegarLoop]: Abstraction has has 801 places, 1891 transitions, 97384 flow [2021-10-13 22:50:22,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.09090909090909) internal successors, (1234), 22 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:22,052 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:50:22,052 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 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 22:50:22,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-10-13 22:50:22,267 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,SelfDestructingSolverStorable67 [2021-10-13 22:50:22,267 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:50:22,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:50:22,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1966058725, now seen corresponding path program 32 times [2021-10-13 22:50:22,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:50:22,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101682852] [2021-10-13 22:50:22,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:50:22,268 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:50:22,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:50:22,403 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:22,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:50:22,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101682852] [2021-10-13 22:50:22,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101682852] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:22,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110044034] [2021-10-13 22:50:22,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:50:22,404 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:22,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:50:22,405 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 22:50:22,405 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 22:50:24,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:50:24,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:50:24,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:50:24,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:50:25,444 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:25,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110044034] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:25,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:50:25,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-10-13 22:50:25,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479725442] [2021-10-13 22:50:25,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 22:50:25,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:50:25,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 22:50:25,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-10-13 22:50:25,446 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:50:25,446 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 801 places, 1891 transitions, 97384 flow. Second operand has 22 states, 22 states have (on average 56.09090909090909) internal successors, (1234), 22 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:25,446 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:50:25,447 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:50:25,447 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:50:30,022 INFO L129 PetriNetUnfolder]: 1262/9462 cut-off events. [2021-10-13 22:50:30,022 INFO L130 PetriNetUnfolder]: For 431503/433213 co-relation queries the response was YES. [2021-10-13 22:50:30,172 INFO L84 FinitePrefix]: Finished finitePrefix Result has 73441 conditions, 9462 events. 1262/9462 cut-off events. For 431503/433213 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 127916 event pairs, 0 based on Foata normal form. 63/8514 useless extension candidates. Maximal degree in co-relation 73155. Up to 2084 conditions per place. [2021-10-13 22:50:30,224 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 1678 selfloop transitions, 282 changer transitions 5/2011 dead transitions. [2021-10-13 22:50:30,224 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 831 places, 2011 transitions, 106451 flow [2021-10-13 22:50:30,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-13 22:50:30,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-10-13 22:50:30,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1893 transitions. [2021-10-13 22:50:30,226 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8435828877005348 [2021-10-13 22:50:30,226 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1893 transitions. [2021-10-13 22:50:30,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1893 transitions. [2021-10-13 22:50:30,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:50:30,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1893 transitions. [2021-10-13 22:50:30,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 57.36363636363637) internal successors, (1893), 33 states have internal predecessors, (1893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:30,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 68.0) internal successors, (2312), 34 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:30,228 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 68.0) internal successors, (2312), 34 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:30,228 INFO L186 Difference]: Start difference. First operand has 801 places, 1891 transitions, 97384 flow. Second operand 33 states and 1893 transitions. [2021-10-13 22:50:30,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 831 places, 2011 transitions, 106451 flow [2021-10-13 22:50:34,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 810 places, 2011 transitions, 106115 flow, removed 12 selfloop flow, removed 21 redundant places. [2021-10-13 22:50:34,359 INFO L242 Difference]: Finished difference. Result has 815 places, 1908 transitions, 98837 flow [2021-10-13 22:50:34,361 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=97058, PETRI_DIFFERENCE_MINUEND_PLACES=778, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1891, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=98837, PETRI_PLACES=815, PETRI_TRANSITIONS=1908} [2021-10-13 22:50:34,361 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 747 predicate places. [2021-10-13 22:50:34,361 INFO L470 AbstractCegarLoop]: Abstraction has has 815 places, 1908 transitions, 98837 flow [2021-10-13 22:50:34,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.09090909090909) internal successors, (1234), 22 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:34,361 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:50:34,361 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 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 22:50:34,384 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 22:50:34,575 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,SelfDestructingSolverStorable68 [2021-10-13 22:50:34,575 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:50:34,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:50:34,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1243210395, now seen corresponding path program 33 times [2021-10-13 22:50:34,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:50:34,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859494443] [2021-10-13 22:50:34,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:50:34,576 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:50:34,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:50:34,700 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:34,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:50:34,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859494443] [2021-10-13 22:50:34,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859494443] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:34,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932953825] [2021-10-13 22:50:34,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:50:34,701 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:34,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:50:34,721 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 22:50:34,722 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 22:50:37,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-13 22:50:37,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:50:37,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:50:37,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:50:37,677 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:37,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932953825] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:37,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:50:37,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-10-13 22:50:37,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245903399] [2021-10-13 22:50:37,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 22:50:37,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:50:37,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 22:50:37,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-10-13 22:50:37,678 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:50:37,679 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 815 places, 1908 transitions, 98837 flow. Second operand has 22 states, 22 states have (on average 56.09090909090909) internal successors, (1234), 22 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:37,679 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:50:37,679 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:50:37,679 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:50:42,138 INFO L129 PetriNetUnfolder]: 1263/9471 cut-off events. [2021-10-13 22:50:42,138 INFO L130 PetriNetUnfolder]: For 440679/442394 co-relation queries the response was YES. [2021-10-13 22:50:42,288 INFO L84 FinitePrefix]: Finished finitePrefix Result has 73807 conditions, 9471 events. 1263/9471 cut-off events. For 440679/442394 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 128086 event pairs, 0 based on Foata normal form. 63/8522 useless extension candidates. Maximal degree in co-relation 73518. Up to 2204 conditions per place. [2021-10-13 22:50:42,348 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 1734 selfloop transitions, 165 changer transitions 5/1950 dead transitions. [2021-10-13 22:50:42,348 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 836 places, 1950 transitions, 104664 flow [2021-10-13 22:50:42,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 22:50:42,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-13 22:50:42,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1380 transitions. [2021-10-13 22:50:42,349 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8455882352941176 [2021-10-13 22:50:42,349 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1380 transitions. [2021-10-13 22:50:42,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1380 transitions. [2021-10-13 22:50:42,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:50:42,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1380 transitions. [2021-10-13 22:50:42,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 57.5) internal successors, (1380), 24 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:42,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 68.0) internal successors, (1700), 25 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:42,351 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 68.0) internal successors, (1700), 25 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:42,351 INFO L186 Difference]: Start difference. First operand has 815 places, 1908 transitions, 98837 flow. Second operand 24 states and 1380 transitions. [2021-10-13 22:50:42,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 836 places, 1950 transitions, 104664 flow [2021-10-13 22:50:46,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 814 places, 1950 transitions, 104359 flow, removed 11 selfloop flow, removed 22 redundant places. [2021-10-13 22:50:46,388 INFO L242 Difference]: Finished difference. Result has 818 places, 1910 transitions, 99146 flow [2021-10-13 22:50:46,389 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=98542, PETRI_DIFFERENCE_MINUEND_PLACES=791, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1908, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1743, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=99146, PETRI_PLACES=818, PETRI_TRANSITIONS=1910} [2021-10-13 22:50:46,389 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 750 predicate places. [2021-10-13 22:50:46,389 INFO L470 AbstractCegarLoop]: Abstraction has has 818 places, 1910 transitions, 99146 flow [2021-10-13 22:50:46,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.09090909090909) internal successors, (1234), 22 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:46,390 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:50:46,390 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 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 22:50:46,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-10-13 22:50:46,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:46,602 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:50:46,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:50:46,602 INFO L82 PathProgramCache]: Analyzing trace with hash -721756079, now seen corresponding path program 34 times [2021-10-13 22:50:46,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:50:46,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600705817] [2021-10-13 22:50:46,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:50:46,603 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:50:46,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:50:46,776 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:46,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:50:46,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600705817] [2021-10-13 22:50:46,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600705817] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:46,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664499893] [2021-10-13 22:50:46,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:50:46,776 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:46,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:50:46,777 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 22:50:46,778 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 22:50:49,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:50:49,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:50:49,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:50:49,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:50:49,785 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:49,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664499893] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:49,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:50:49,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-10-13 22:50:49,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59036759] [2021-10-13 22:50:49,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 22:50:49,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:50:49,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 22:50:49,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-10-13 22:50:49,787 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:50:49,787 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 818 places, 1910 transitions, 99146 flow. Second operand has 22 states, 22 states have (on average 56.09090909090909) internal successors, (1234), 22 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:49,787 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:50:49,787 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:50:49,787 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:50:54,379 INFO L129 PetriNetUnfolder]: 1270/9534 cut-off events. [2021-10-13 22:50:54,380 INFO L130 PetriNetUnfolder]: For 448607/450327 co-relation queries the response was YES. [2021-10-13 22:50:54,518 INFO L84 FinitePrefix]: Finished finitePrefix Result has 74288 conditions, 9534 events. 1270/9534 cut-off events. For 448607/450327 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 129206 event pairs, 0 based on Foata normal form. 63/8578 useless extension candidates. Maximal degree in co-relation 73997. Up to 2039 conditions per place. [2021-10-13 22:50:54,569 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 1626 selfloop transitions, 345 changer transitions 5/2022 dead transitions. [2021-10-13 22:50:54,569 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 846 places, 2022 transitions, 107744 flow [2021-10-13 22:50:54,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-13 22:50:54,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-13 22:50:54,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1780 transitions. [2021-10-13 22:50:54,573 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8444022770398482 [2021-10-13 22:50:54,573 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1780 transitions. [2021-10-13 22:50:54,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1780 transitions. [2021-10-13 22:50:54,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:50:54,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1780 transitions. [2021-10-13 22:50:54,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 57.41935483870968) internal successors, (1780), 31 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:54,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 68.0) internal successors, (2176), 32 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:54,578 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 68.0) internal successors, (2176), 32 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:54,578 INFO L186 Difference]: Start difference. First operand has 818 places, 1910 transitions, 99146 flow. Second operand 31 states and 1780 transitions. [2021-10-13 22:50:54,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 846 places, 2022 transitions, 107744 flow [2021-10-13 22:50:59,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 827 places, 2022 transitions, 107513 flow, removed 12 selfloop flow, removed 19 redundant places. [2021-10-13 22:50:59,213 INFO L242 Difference]: Finished difference. Result has 832 places, 1920 transitions, 100439 flow [2021-10-13 22:50:59,214 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=98925, PETRI_DIFFERENCE_MINUEND_PLACES=797, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1910, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=335, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=100439, PETRI_PLACES=832, PETRI_TRANSITIONS=1920} [2021-10-13 22:50:59,214 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 764 predicate places. [2021-10-13 22:50:59,214 INFO L470 AbstractCegarLoop]: Abstraction has has 832 places, 1920 transitions, 100439 flow [2021-10-13 22:50:59,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.09090909090909) internal successors, (1234), 22 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:59,214 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:50:59,215 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 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 22:50:59,238 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 22:50:59,429 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,SelfDestructingSolverStorable70 [2021-10-13 22:50:59,429 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:50:59,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:50:59,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1453649271, now seen corresponding path program 35 times [2021-10-13 22:50:59,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:50:59,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886957547] [2021-10-13 22:50:59,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:50:59,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:50:59,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:50:59,554 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:59,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:50:59,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886957547] [2021-10-13 22:50:59,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886957547] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:59,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638341966] [2021-10-13 22:50:59,554 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:50:59,555 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:59,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:50:59,556 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 22:50:59,566 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 22:51:02,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-13 22:51:02,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:51:02,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:51:02,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:51:02,491 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:02,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638341966] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:02,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:51:02,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-10-13 22:51:02,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250038890] [2021-10-13 22:51:02,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 22:51:02,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:51:02,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 22:51:02,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-10-13 22:51:02,493 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:51:02,493 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 832 places, 1920 transitions, 100439 flow. Second operand has 22 states, 22 states have (on average 56.09090909090909) internal successors, (1234), 22 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:02,493 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:51:02,493 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:51:02,493 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:51:06,979 INFO L129 PetriNetUnfolder]: 1271/9543 cut-off events. [2021-10-13 22:51:06,980 INFO L130 PetriNetUnfolder]: For 460347/462072 co-relation queries the response was YES. [2021-10-13 22:51:07,299 INFO L84 FinitePrefix]: Finished finitePrefix Result has 74827 conditions, 9543 events. 1271/9543 cut-off events. For 460347/462072 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 129388 event pairs, 0 based on Foata normal form. 63/8586 useless extension candidates. Maximal degree in co-relation 74533. Up to 2167 conditions per place. [2021-10-13 22:51:07,353 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 1692 selfloop transitions, 219 changer transitions 5/1962 dead transitions. [2021-10-13 22:51:07,353 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 854 places, 1962 transitions, 106312 flow [2021-10-13 22:51:07,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-13 22:51:07,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-10-13 22:51:07,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1438 transitions. [2021-10-13 22:51:07,355 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8458823529411764 [2021-10-13 22:51:07,355 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1438 transitions. [2021-10-13 22:51:07,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1438 transitions. [2021-10-13 22:51:07,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:51:07,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1438 transitions. [2021-10-13 22:51:07,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 57.52) internal successors, (1438), 25 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:07,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 68.0) internal successors, (1768), 26 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:07,357 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 68.0) internal successors, (1768), 26 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:07,357 INFO L186 Difference]: Start difference. First operand has 832 places, 1920 transitions, 100439 flow. Second operand 25 states and 1438 transitions. [2021-10-13 22:51:07,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 854 places, 1962 transitions, 106312 flow [2021-10-13 22:51:11,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 831 places, 1962 transitions, 105933 flow, removed 12 selfloop flow, removed 23 redundant places. [2021-10-13 22:51:11,994 INFO L242 Difference]: Finished difference. Result has 835 places, 1922 transitions, 100843 flow [2021-10-13 22:51:11,995 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=100070, PETRI_DIFFERENCE_MINUEND_PLACES=807, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1920, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1701, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=100843, PETRI_PLACES=835, PETRI_TRANSITIONS=1922} [2021-10-13 22:51:11,995 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 767 predicate places. [2021-10-13 22:51:11,995 INFO L470 AbstractCegarLoop]: Abstraction has has 835 places, 1922 transitions, 100843 flow [2021-10-13 22:51:11,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.09090909090909) internal successors, (1234), 22 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:11,996 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:51:11,996 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 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 22:51:12,019 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 22:51:12,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:51:12,202 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:51:12,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:51:12,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1896964501, now seen corresponding path program 36 times [2021-10-13 22:51:12,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:51:12,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520923643] [2021-10-13 22:51:12,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:51:12,203 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:51:12,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:51:12,370 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:12,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:51:12,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520923643] [2021-10-13 22:51:12,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520923643] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:12,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776324563] [2021-10-13 22:51:12,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:51:12,370 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:51:12,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:51:12,371 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 22:51:12,372 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 22:51:15,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-13 22:51:15,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:51:15,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:51:15,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:51:15,461 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:15,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776324563] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:15,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:51:15,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-10-13 22:51:15,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031180013] [2021-10-13 22:51:15,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 22:51:15,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:51:15,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 22:51:15,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-10-13 22:51:15,463 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:51:15,463 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 835 places, 1922 transitions, 100843 flow. Second operand has 22 states, 22 states have (on average 56.09090909090909) internal successors, (1234), 22 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:15,463 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:51:15,463 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:51:15,463 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:51:20,075 INFO L129 PetriNetUnfolder]: 1284/9653 cut-off events. [2021-10-13 22:51:20,075 INFO L130 PetriNetUnfolder]: For 470505/472194 co-relation queries the response was YES. [2021-10-13 22:51:20,228 INFO L84 FinitePrefix]: Finished finitePrefix Result has 75696 conditions, 9653 events. 1284/9653 cut-off events. For 470505/472194 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 131383 event pairs, 0 based on Foata normal form. 73/8695 useless extension candidates. Maximal degree in co-relation 75400. Up to 1831 conditions per place. [2021-10-13 22:51:20,281 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 1394 selfloop transitions, 592 changer transitions 5/2037 dead transitions. [2021-10-13 22:51:20,281 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 874 places, 2037 transitions, 109797 flow [2021-10-13 22:51:20,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-13 22:51:20,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-10-13 22:51:20,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2411 transitions. [2021-10-13 22:51:20,282 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.844187675070028 [2021-10-13 22:51:20,282 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2411 transitions. [2021-10-13 22:51:20,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2411 transitions. [2021-10-13 22:51:20,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:51:20,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2411 transitions. [2021-10-13 22:51:20,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 57.404761904761905) internal successors, (2411), 42 states have internal predecessors, (2411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:20,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 68.0) internal successors, (2924), 43 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:20,286 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 68.0) internal successors, (2924), 43 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:20,286 INFO L186 Difference]: Start difference. First operand has 835 places, 1922 transitions, 100843 flow. Second operand 42 states and 2411 transitions. [2021-10-13 22:51:20,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 874 places, 2037 transitions, 109797 flow [2021-10-13 22:51:25,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 853 places, 2037 transitions, 109514 flow, removed 10 selfloop flow, removed 21 redundant places. [2021-10-13 22:51:25,215 INFO L242 Difference]: Finished difference. Result has 857 places, 1936 transitions, 103069 flow [2021-10-13 22:51:25,220 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=100570, PETRI_DIFFERENCE_MINUEND_PLACES=812, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1922, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=578, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=103069, PETRI_PLACES=857, PETRI_TRANSITIONS=1936} [2021-10-13 22:51:25,220 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 789 predicate places. [2021-10-13 22:51:25,221 INFO L470 AbstractCegarLoop]: Abstraction has has 857 places, 1936 transitions, 103069 flow [2021-10-13 22:51:25,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.09090909090909) internal successors, (1234), 22 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:25,221 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:51:25,221 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 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 22:51:25,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-10-13 22:51:25,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:51:25,444 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:51:25,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:51:25,444 INFO L82 PathProgramCache]: Analyzing trace with hash -414421757, now seen corresponding path program 37 times [2021-10-13 22:51:25,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:51:25,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679790332] [2021-10-13 22:51:25,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:51:25,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:51:25,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:51:25,559 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:25,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:51:25,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679790332] [2021-10-13 22:51:25,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679790332] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:25,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229041737] [2021-10-13 22:51:25,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:51:25,559 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:51:25,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:51:25,560 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 22:51:25,645 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 22:51:28,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:51:28,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:51:28,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:51:28,812 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:28,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229041737] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:28,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:51:28,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-13 22:51:28,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120684802] [2021-10-13 22:51:28,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:51:28,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:51:28,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:51:28,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:51:28,813 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:51:28,814 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 857 places, 1936 transitions, 103069 flow. Second operand has 23 states, 23 states have (on average 56.08695652173913) internal successors, (1290), 23 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:28,814 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:51:28,814 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:51:28,814 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:51:34,911 INFO L129 PetriNetUnfolder]: 1358/10188 cut-off events. [2021-10-13 22:51:34,911 INFO L130 PetriNetUnfolder]: For 552863/554698 co-relation queries the response was YES. [2021-10-13 22:51:35,176 INFO L84 FinitePrefix]: Finished finitePrefix Result has 81483 conditions, 10188 events. 1358/10188 cut-off events. For 552863/554698 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 139859 event pairs, 0 based on Foata normal form. 284/9384 useless extension candidates. Maximal degree in co-relation 81185. Up to 1817 conditions per place. [2021-10-13 22:51:35,231 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 260 selfloop transitions, 1746 changer transitions 17/2069 dead transitions. [2021-10-13 22:51:35,231 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 924 places, 2069 transitions, 116231 flow [2021-10-13 22:51:35,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-10-13 22:51:35,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-10-13 22:51:35,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 4036 transitions. [2021-10-13 22:51:35,233 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8478991596638655 [2021-10-13 22:51:35,233 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 4036 transitions. [2021-10-13 22:51:35,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 4036 transitions. [2021-10-13 22:51:35,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:51:35,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 4036 transitions. [2021-10-13 22:51:35,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 57.65714285714286) internal successors, (4036), 70 states have internal predecessors, (4036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:35,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 68.0) internal successors, (4828), 71 states have internal predecessors, (4828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:35,238 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 68.0) internal successors, (4828), 71 states have internal predecessors, (4828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:35,238 INFO L186 Difference]: Start difference. First operand has 857 places, 1936 transitions, 103069 flow. Second operand 70 states and 4036 transitions. [2021-10-13 22:51:35,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 924 places, 2069 transitions, 116231 flow [2021-10-13 22:51:40,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 889 places, 2069 transitions, 115541 flow, removed 25 selfloop flow, removed 35 redundant places. [2021-10-13 22:51:40,722 INFO L242 Difference]: Finished difference. Result has 901 places, 2033 transitions, 113214 flow [2021-10-13 22:51:40,723 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=102429, PETRI_DIFFERENCE_MINUEND_PLACES=820, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1936, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1657, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=113214, PETRI_PLACES=901, PETRI_TRANSITIONS=2033} [2021-10-13 22:51:40,724 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 833 predicate places. [2021-10-13 22:51:40,724 INFO L470 AbstractCegarLoop]: Abstraction has has 901 places, 2033 transitions, 113214 flow [2021-10-13 22:51:40,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 56.08695652173913) internal successors, (1290), 23 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:40,724 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:51:40,724 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 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 22:51:40,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-10-13 22:51:40,940 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,SelfDestructingSolverStorable73 [2021-10-13 22:51:40,940 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:51:40,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:51:40,940 INFO L82 PathProgramCache]: Analyzing trace with hash -2093271253, now seen corresponding path program 38 times [2021-10-13 22:51:40,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:51:40,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77739943] [2021-10-13 22:51:40,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:51:40,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:51:40,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:51:41,051 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:41,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:51:41,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77739943] [2021-10-13 22:51:41,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77739943] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:41,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278260032] [2021-10-13 22:51:41,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:51:41,051 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:51:41,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:51:41,052 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 22:51:41,053 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 22:51:43,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:51:43,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:51:43,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:51:43,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:51:44,308 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:44,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278260032] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:44,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:51:44,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-13 22:51:44,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792783010] [2021-10-13 22:51:44,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:51:44,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:51:44,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:51:44,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:51:44,310 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:51:44,310 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 901 places, 2033 transitions, 113214 flow. Second operand has 23 states, 23 states have (on average 56.08695652173913) internal successors, (1290), 23 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:44,310 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:51:44,310 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:51:44,310 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:51:50,751 INFO L129 PetriNetUnfolder]: 1411/10567 cut-off events. [2021-10-13 22:51:50,751 INFO L130 PetriNetUnfolder]: For 614441/616514 co-relation queries the response was YES. [2021-10-13 22:51:50,918 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87661 conditions, 10567 events. 1411/10567 cut-off events. For 614441/616514 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 146021 event pairs, 0 based on Foata normal form. 270/9709 useless extension candidates. Maximal degree in co-relation 87354. Up to 1909 conditions per place. [2021-10-13 22:51:51,056 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 322 selfloop transitions, 1768 changer transitions 17/2153 dead transitions. [2021-10-13 22:51:51,057 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 957 places, 2153 transitions, 126096 flow [2021-10-13 22:51:51,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-10-13 22:51:51,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-10-13 22:51:51,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3634 transitions. [2021-10-13 22:51:51,059 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8482726423902894 [2021-10-13 22:51:51,059 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3634 transitions. [2021-10-13 22:51:51,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3634 transitions. [2021-10-13 22:51:51,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:51:51,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3634 transitions. [2021-10-13 22:51:51,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 57.682539682539684) internal successors, (3634), 63 states have internal predecessors, (3634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:51,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 68.0) internal successors, (4352), 64 states have internal predecessors, (4352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:51,064 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 68.0) internal successors, (4352), 64 states have internal predecessors, (4352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:51,064 INFO L186 Difference]: Start difference. First operand has 901 places, 2033 transitions, 113214 flow. Second operand 63 states and 3634 transitions. [2021-10-13 22:51:51,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 957 places, 2153 transitions, 126096 flow [2021-10-13 22:51:56,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 908 places, 2153 transitions, 120689 flow, removed 2393 selfloop flow, removed 49 redundant places. [2021-10-13 22:51:56,955 INFO L242 Difference]: Finished difference. Result has 920 places, 2110 transitions, 117951 flow [2021-10-13 22:51:56,956 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=108171, PETRI_DIFFERENCE_MINUEND_PLACES=846, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2033, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1696, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=117951, PETRI_PLACES=920, PETRI_TRANSITIONS=2110} [2021-10-13 22:51:56,956 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 852 predicate places. [2021-10-13 22:51:56,956 INFO L470 AbstractCegarLoop]: Abstraction has has 920 places, 2110 transitions, 117951 flow [2021-10-13 22:51:56,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 56.08695652173913) internal successors, (1290), 23 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:56,956 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:51:56,956 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 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 22:51:56,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-10-13 22:51:57,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:51:57,171 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:51:57,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:51:57,172 INFO L82 PathProgramCache]: Analyzing trace with hash -960968579, now seen corresponding path program 39 times [2021-10-13 22:51:57,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:51:57,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870148079] [2021-10-13 22:51:57,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:51:57,172 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:51:57,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:51:57,278 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:57,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:51:57,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870148079] [2021-10-13 22:51:57,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870148079] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:57,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090117062] [2021-10-13 22:51:57,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:51:57,279 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:51:57,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:51:57,279 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 22:51:57,281 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 22:52:00,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-13 22:52:00,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:52:00,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:52:00,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:52:00,530 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:52:00,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090117062] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:52:00,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:52:00,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-13 22:52:00,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367266511] [2021-10-13 22:52:00,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:52:00,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:52:00,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:52:00,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:52:00,532 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:52:00,532 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 920 places, 2110 transitions, 117951 flow. Second operand has 23 states, 23 states have (on average 56.08695652173913) internal successors, (1290), 23 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:00,532 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:52:00,532 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:52:00,532 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:52:06,827 INFO L129 PetriNetUnfolder]: 1446/10813 cut-off events. [2021-10-13 22:52:06,828 INFO L130 PetriNetUnfolder]: For 632930/634888 co-relation queries the response was YES. [2021-10-13 22:52:07,010 INFO L84 FinitePrefix]: Finished finitePrefix Result has 90137 conditions, 10813 events. 1446/10813 cut-off events. For 632930/634888 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 150074 event pairs, 0 based on Foata normal form. 238/9896 useless extension candidates. Maximal degree in co-relation 89825. Up to 1816 conditions per place. [2021-10-13 22:52:07,138 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 504 selfloop transitions, 1637 changer transitions 17/2204 dead transitions. [2021-10-13 22:52:07,139 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 972 places, 2204 transitions, 129543 flow [2021-10-13 22:52:07,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-10-13 22:52:07,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-10-13 22:52:07,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3404 transitions. [2021-10-13 22:52:07,145 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8484546360917248 [2021-10-13 22:52:07,145 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3404 transitions. [2021-10-13 22:52:07,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3404 transitions. [2021-10-13 22:52:07,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:52:07,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3404 transitions. [2021-10-13 22:52:07,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 57.69491525423729) internal successors, (3404), 59 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:07,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 68.0) internal successors, (4080), 60 states have internal predecessors, (4080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:07,149 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 68.0) internal successors, (4080), 60 states have internal predecessors, (4080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:07,149 INFO L186 Difference]: Start difference. First operand has 920 places, 2110 transitions, 117951 flow. Second operand 59 states and 3404 transitions. [2021-10-13 22:52:07,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 972 places, 2204 transitions, 129543 flow [2021-10-13 22:52:13,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 922 places, 2204 transitions, 125018 flow, removed 1914 selfloop flow, removed 50 redundant places. [2021-10-13 22:52:13,675 INFO L242 Difference]: Finished difference. Result has 934 places, 2166 transitions, 121993 flow [2021-10-13 22:52:13,677 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=113756, PETRI_DIFFERENCE_MINUEND_PLACES=864, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1588, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=121993, PETRI_PLACES=934, PETRI_TRANSITIONS=2166} [2021-10-13 22:52:13,678 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 866 predicate places. [2021-10-13 22:52:13,678 INFO L470 AbstractCegarLoop]: Abstraction has has 934 places, 2166 transitions, 121993 flow [2021-10-13 22:52:13,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 56.08695652173913) internal successors, (1290), 23 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:13,678 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:52:13,678 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 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 22:52:13,704 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 22:52:13,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:52:13,902 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:52:13,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:52:13,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1977701697, now seen corresponding path program 40 times [2021-10-13 22:52:13,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:52:13,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823731500] [2021-10-13 22:52:13,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:52:13,903 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:52:13,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:52:14,060 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:52:14,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:52:14,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823731500] [2021-10-13 22:52:14,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823731500] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:52:14,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174648639] [2021-10-13 22:52:14,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:52:14,061 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:52:14,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:52:14,066 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 22:52:14,068 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 22:52:17,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:52:17,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:52:17,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:52:17,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:52:17,465 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:52:17,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174648639] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:52:17,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:52:17,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-10-13 22:52:17,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631883722] [2021-10-13 22:52:17,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 22:52:17,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:52:17,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 22:52:17,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-10-13 22:52:17,466 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:52:17,467 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 934 places, 2166 transitions, 121993 flow. Second operand has 22 states, 22 states have (on average 56.09090909090909) internal successors, (1234), 22 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:17,467 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:52:17,467 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:52:17,467 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:52:23,420 INFO L129 PetriNetUnfolder]: 1453/10922 cut-off events. [2021-10-13 22:52:23,420 INFO L130 PetriNetUnfolder]: For 586597/588560 co-relation queries the response was YES. [2021-10-13 22:52:23,597 INFO L84 FinitePrefix]: Finished finitePrefix Result has 90810 conditions, 10922 events. 1453/10922 cut-off events. For 586597/588560 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 152234 event pairs, 0 based on Foata normal form. 58/9812 useless extension candidates. Maximal degree in co-relation 90493. Up to 2241 conditions per place. [2021-10-13 22:52:23,772 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 1742 selfloop transitions, 502 changer transitions 5/2295 dead transitions. [2021-10-13 22:52:23,772 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 974 places, 2295 transitions, 132442 flow [2021-10-13 22:52:23,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-10-13 22:52:23,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-10-13 22:52:23,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2695 transitions. [2021-10-13 22:52:23,773 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8432415519399249 [2021-10-13 22:52:23,774 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2695 transitions. [2021-10-13 22:52:23,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2695 transitions. [2021-10-13 22:52:23,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:52:23,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2695 transitions. [2021-10-13 22:52:23,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 57.340425531914896) internal successors, (2695), 47 states have internal predecessors, (2695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:23,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 68.0) internal successors, (3264), 48 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:23,777 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 68.0) internal successors, (3264), 48 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:23,777 INFO L186 Difference]: Start difference. First operand has 934 places, 2166 transitions, 121993 flow. Second operand 47 states and 2695 transitions. [2021-10-13 22:52:23,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 974 places, 2295 transitions, 132442 flow [2021-10-13 22:52:30,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 927 places, 2295 transitions, 130801 flow, removed 447 selfloop flow, removed 47 redundant places. [2021-10-13 22:52:30,515 INFO L242 Difference]: Finished difference. Result has 932 places, 2188 transitions, 123110 flow [2021-10-13 22:52:30,517 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=120401, PETRI_DIFFERENCE_MINUEND_PLACES=881, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=480, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1665, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=123110, PETRI_PLACES=932, PETRI_TRANSITIONS=2188} [2021-10-13 22:52:30,517 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 864 predicate places. [2021-10-13 22:52:30,517 INFO L470 AbstractCegarLoop]: Abstraction has has 932 places, 2188 transitions, 123110 flow [2021-10-13 22:52:30,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.09090909090909) internal successors, (1234), 22 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:30,517 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:52:30,517 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 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 22:52:30,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-10-13 22:52:30,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:52:30,731 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:52:30,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:52:30,732 INFO L82 PathProgramCache]: Analyzing trace with hash -114739139, now seen corresponding path program 41 times [2021-10-13 22:52:30,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:52:30,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121179924] [2021-10-13 22:52:30,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:52:30,732 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:52:30,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:52:30,843 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:52:30,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:52:30,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121179924] [2021-10-13 22:52:30,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121179924] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:52:30,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074359769] [2021-10-13 22:52:30,843 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:52:30,843 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:52:30,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:52:30,844 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 22:52:30,883 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 22:52:33,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-13 22:52:33,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:52:33,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:52:33,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:52:34,198 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:52:34,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074359769] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:52:34,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:52:34,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-10-13 22:52:34,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629968004] [2021-10-13 22:52:34,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 22:52:34,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:52:34,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 22:52:34,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-10-13 22:52:34,200 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:52:34,200 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 932 places, 2188 transitions, 123110 flow. Second operand has 22 states, 22 states have (on average 56.09090909090909) internal successors, (1234), 22 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:34,201 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:52:34,201 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:52:34,201 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:52:40,380 INFO L129 PetriNetUnfolder]: 1460/10985 cut-off events. [2021-10-13 22:52:40,380 INFO L130 PetriNetUnfolder]: For 593087/595027 co-relation queries the response was YES. [2021-10-13 22:52:40,565 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91326 conditions, 10985 events. 1460/10985 cut-off events. For 593087/595027 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 153392 event pairs, 0 based on Foata normal form. 66/9876 useless extension candidates. Maximal degree in co-relation 91012. Up to 2059 conditions per place. [2021-10-13 22:52:40,626 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 1549 selfloop transitions, 702 changer transitions 5/2302 dead transitions. [2021-10-13 22:52:40,627 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 982 places, 2302 transitions, 132838 flow [2021-10-13 22:52:40,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-10-13 22:52:40,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-10-13 22:52:40,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3040 transitions. [2021-10-13 22:52:40,628 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8435072142064373 [2021-10-13 22:52:40,628 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 3040 transitions. [2021-10-13 22:52:40,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 3040 transitions. [2021-10-13 22:52:40,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:52:40,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 3040 transitions. [2021-10-13 22:52:40,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 57.35849056603774) internal successors, (3040), 53 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:40,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 68.0) internal successors, (3672), 54 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:40,632 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 68.0) internal successors, (3672), 54 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:40,632 INFO L186 Difference]: Start difference. First operand has 932 places, 2188 transitions, 123110 flow. Second operand 53 states and 3040 transitions. [2021-10-13 22:52:40,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 982 places, 2302 transitions, 132838 flow [2021-10-13 22:52:47,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 939 places, 2302 transitions, 132184 flow, removed 27 selfloop flow, removed 43 redundant places. [2021-10-13 22:52:47,237 INFO L242 Difference]: Finished difference. Result has 943 places, 2197 transitions, 125096 flow [2021-10-13 22:52:47,238 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=122466, PETRI_DIFFERENCE_MINUEND_PLACES=887, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=693, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=125096, PETRI_PLACES=943, PETRI_TRANSITIONS=2197} [2021-10-13 22:52:47,238 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 875 predicate places. [2021-10-13 22:52:47,238 INFO L470 AbstractCegarLoop]: Abstraction has has 943 places, 2197 transitions, 125096 flow [2021-10-13 22:52:47,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.09090909090909) internal successors, (1234), 22 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:47,238 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:52:47,239 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 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 22:52:47,263 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 22:52:47,459 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,SelfDestructingSolverStorable77 [2021-10-13 22:52:47,459 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:52:47,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:52:47,460 INFO L82 PathProgramCache]: Analyzing trace with hash -426535927, now seen corresponding path program 42 times [2021-10-13 22:52:47,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:52:47,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302558656] [2021-10-13 22:52:47,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:52:47,460 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:52:47,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:52:47,615 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:52:47,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:52:47,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302558656] [2021-10-13 22:52:47,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302558656] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:52:47,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734027837] [2021-10-13 22:52:47,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:52:47,615 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:52:47,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:52:47,616 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 22:52:47,617 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 22:52:50,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-10-13 22:52:50,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:52:50,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:52:50,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:52:50,987 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:52:50,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734027837] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:52:50,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:52:50,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-10-13 22:52:50,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063342756] [2021-10-13 22:52:50,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 22:52:50,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:52:50,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 22:52:50,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-10-13 22:52:50,988 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:52:50,989 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 943 places, 2197 transitions, 125096 flow. Second operand has 22 states, 22 states have (on average 56.09090909090909) internal successors, (1234), 22 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:50,989 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:52:50,989 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:52:50,989 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:52:57,220 INFO L129 PetriNetUnfolder]: 1483/11192 cut-off events. [2021-10-13 22:52:57,220 INFO L130 PetriNetUnfolder]: For 618516/620461 co-relation queries the response was YES. [2021-10-13 22:52:57,402 INFO L84 FinitePrefix]: Finished finitePrefix Result has 93551 conditions, 11192 events. 1483/11192 cut-off events. For 618516/620461 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 156895 event pairs, 0 based on Foata normal form. 78/10072 useless extension candidates. Maximal degree in co-relation 93238. Up to 1971 conditions per place. [2021-10-13 22:52:57,465 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 1421 selfloop transitions, 848 changer transitions 5/2320 dead transitions. [2021-10-13 22:52:57,465 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 992 places, 2320 transitions, 135505 flow [2021-10-13 22:52:57,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-10-13 22:52:57,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-10-13 22:52:57,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 2986 transitions. [2021-10-13 22:52:57,467 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8444570135746606 [2021-10-13 22:52:57,467 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 2986 transitions. [2021-10-13 22:52:57,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 2986 transitions. [2021-10-13 22:52:57,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:52:57,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 2986 transitions. [2021-10-13 22:52:57,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 57.42307692307692) internal successors, (2986), 52 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:57,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 68.0) internal successors, (3604), 53 states have internal predecessors, (3604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:57,471 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 68.0) internal successors, (3604), 53 states have internal predecessors, (3604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:57,471 INFO L186 Difference]: Start difference. First operand has 943 places, 2197 transitions, 125096 flow. Second operand 52 states and 2986 transitions. [2021-10-13 22:52:57,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 992 places, 2320 transitions, 135505 flow [2021-10-13 22:53:04,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 950 places, 2320 transitions, 134709 flow, removed 25 selfloop flow, removed 42 redundant places. [2021-10-13 22:53:04,317 INFO L242 Difference]: Finished difference. Result has 957 places, 2224 transitions, 128449 flow [2021-10-13 22:53:04,318 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=124314, PETRI_DIFFERENCE_MINUEND_PLACES=899, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=821, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=128449, PETRI_PLACES=957, PETRI_TRANSITIONS=2224} [2021-10-13 22:53:04,318 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 889 predicate places. [2021-10-13 22:53:04,319 INFO L470 AbstractCegarLoop]: Abstraction has has 957 places, 2224 transitions, 128449 flow [2021-10-13 22:53:04,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.09090909090909) internal successors, (1234), 22 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:04,319 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:53:04,319 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 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 22:53:04,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-10-13 22:53:04,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:53:04,531 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:53:04,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:53:04,531 INFO L82 PathProgramCache]: Analyzing trace with hash 42551819, now seen corresponding path program 43 times [2021-10-13 22:53:04,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:53:04,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237267563] [2021-10-13 22:53:04,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:53:04,532 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:53:04,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:53:04,663 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:53:04,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:53:04,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237267563] [2021-10-13 22:53:04,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237267563] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:53:04,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123332713] [2021-10-13 22:53:04,663 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:53:04,664 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:53:04,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:53:04,664 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 22:53:04,665 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 22:53:07,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:53:07,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:53:07,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:53:08,116 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:53:08,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123332713] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:53:08,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:53:08,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-10-13 22:53:08,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185361784] [2021-10-13 22:53:08,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 22:53:08,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:53:08,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 22:53:08,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-10-13 22:53:08,117 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:53:08,118 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 957 places, 2224 transitions, 128449 flow. Second operand has 22 states, 22 states have (on average 56.09090909090909) internal successors, (1234), 22 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:08,118 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:53:08,118 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:53:08,118 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:53:14,738 INFO L129 PetriNetUnfolder]: 1506/11357 cut-off events. [2021-10-13 22:53:14,739 INFO L130 PetriNetUnfolder]: For 648346/650394 co-relation queries the response was YES. [2021-10-13 22:53:14,929 INFO L84 FinitePrefix]: Finished finitePrefix Result has 95915 conditions, 11357 events. 1506/11357 cut-off events. For 648346/650394 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 160082 event pairs, 0 based on Foata normal form. 108/10251 useless extension candidates. Maximal degree in co-relation 95598. Up to 1897 conditions per place. [2021-10-13 22:53:15,058 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 1296 selfloop transitions, 985 changer transitions 5/2332 dead transitions. [2021-10-13 22:53:15,058 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1008 places, 2332 transitions, 138289 flow [2021-10-13 22:53:15,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-13 22:53:15,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-10-13 22:53:15,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3104 transitions. [2021-10-13 22:53:15,060 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8453159041394336 [2021-10-13 22:53:15,060 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3104 transitions. [2021-10-13 22:53:15,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3104 transitions. [2021-10-13 22:53:15,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:53:15,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3104 transitions. [2021-10-13 22:53:15,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 57.48148148148148) internal successors, (3104), 54 states have internal predecessors, (3104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:15,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 68.0) internal successors, (3740), 55 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:15,064 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 68.0) internal successors, (3740), 55 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:15,064 INFO L186 Difference]: Start difference. First operand has 957 places, 2224 transitions, 128449 flow. Second operand 54 states and 3104 transitions. [2021-10-13 22:53:15,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1008 places, 2332 transitions, 138289 flow [2021-10-13 22:53:22,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 967 places, 2332 transitions, 137239 flow, removed 93 selfloop flow, removed 41 redundant places. [2021-10-13 22:53:22,364 INFO L242 Difference]: Finished difference. Result has 970 places, 2247 transitions, 131596 flow [2021-10-13 22:53:22,366 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=127457, PETRI_DIFFERENCE_MINUEND_PLACES=914, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=962, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=131596, PETRI_PLACES=970, PETRI_TRANSITIONS=2247} [2021-10-13 22:53:22,366 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 902 predicate places. [2021-10-13 22:53:22,366 INFO L470 AbstractCegarLoop]: Abstraction has has 970 places, 2247 transitions, 131596 flow [2021-10-13 22:53:22,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.09090909090909) internal successors, (1234), 22 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:22,366 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:53:22,366 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 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 22:53:22,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-10-13 22:53:22,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:53:22,587 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:53:22,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:53:22,588 INFO L82 PathProgramCache]: Analyzing trace with hash 637060413, now seen corresponding path program 44 times [2021-10-13 22:53:22,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:53:22,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221277962] [2021-10-13 22:53:22,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:53:22,588 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:53:22,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:53:22,694 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:53:22,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:53:22,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221277962] [2021-10-13 22:53:22,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221277962] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:53:22,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476322482] [2021-10-13 22:53:22,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:53:22,695 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:53:22,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:53:22,696 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 22:53:22,722 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 22:53:25,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:53:25,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:53:25,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:53:25,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:53:26,225 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:53:26,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476322482] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:53:26,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:53:26,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-13 22:53:26,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671869856] [2021-10-13 22:53:26,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:53:26,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:53:26,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:53:26,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:53:26,226 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:53:26,227 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 970 places, 2247 transitions, 131596 flow. Second operand has 23 states, 23 states have (on average 56.08695652173913) internal successors, (1290), 23 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:26,227 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:53:26,227 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:53:26,227 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:53:33,495 INFO L129 PetriNetUnfolder]: 1585/11933 cut-off events. [2021-10-13 22:53:33,495 INFO L130 PetriNetUnfolder]: For 760388/762677 co-relation queries the response was YES. [2021-10-13 22:53:33,706 INFO L84 FinitePrefix]: Finished finitePrefix Result has 102799 conditions, 11933 events. 1585/11933 cut-off events. For 760388/762677 co-relation queries the response was YES. Maximal size of possible extension queue 700. Compared 169899 event pairs, 0 based on Foata normal form. 296/10954 useless extension candidates. Maximal degree in co-relation 102481. Up to 2036 conditions per place. [2021-10-13 22:53:33,774 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 486 selfloop transitions, 1855 changer transitions 17/2404 dead transitions. [2021-10-13 22:53:33,774 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1032 places, 2404 transitions, 147570 flow [2021-10-13 22:53:33,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-10-13 22:53:33,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-10-13 22:53:33,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3749 transitions. [2021-10-13 22:53:33,776 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8481900452488688 [2021-10-13 22:53:33,776 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3749 transitions. [2021-10-13 22:53:33,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3749 transitions. [2021-10-13 22:53:33,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:53:33,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3749 transitions. [2021-10-13 22:53:33,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 57.676923076923075) internal successors, (3749), 65 states have internal predecessors, (3749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:33,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 68.0) internal successors, (4488), 66 states have internal predecessors, (4488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:33,781 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 68.0) internal successors, (4488), 66 states have internal predecessors, (4488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:33,781 INFO L186 Difference]: Start difference. First operand has 970 places, 2247 transitions, 131596 flow. Second operand 65 states and 3749 transitions. [2021-10-13 22:53:33,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1032 places, 2404 transitions, 147570 flow [2021-10-13 22:53:41,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 989 places, 2404 transitions, 146357 flow, removed 33 selfloop flow, removed 43 redundant places. [2021-10-13 22:53:42,062 INFO L242 Difference]: Finished difference. Result has 1001 places, 2346 transitions, 142717 flow [2021-10-13 22:53:42,063 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=130446, PETRI_DIFFERENCE_MINUEND_PLACES=925, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1766, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=142717, PETRI_PLACES=1001, PETRI_TRANSITIONS=2346} [2021-10-13 22:53:42,063 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 933 predicate places. [2021-10-13 22:53:42,063 INFO L470 AbstractCegarLoop]: Abstraction has has 1001 places, 2346 transitions, 142717 flow [2021-10-13 22:53:42,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 56.08695652173913) internal successors, (1290), 23 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:42,064 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:53:42,064 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 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 22:53:42,091 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 22:53:42,289 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,SelfDestructingSolverStorable80 [2021-10-13 22:53:42,289 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:53:42,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:53:42,289 INFO L82 PathProgramCache]: Analyzing trace with hash 676669397, now seen corresponding path program 45 times [2021-10-13 22:53:42,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:53:42,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124140268] [2021-10-13 22:53:42,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:53:42,290 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:53:42,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:53:42,401 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:53:42,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:53:42,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124140268] [2021-10-13 22:53:42,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124140268] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:53:42,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424152149] [2021-10-13 22:53:42,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:53:42,401 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:53:42,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:53:42,402 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 22:53:42,403 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 22:53:45,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-13 22:53:45,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:53:45,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:53:45,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:53:45,834 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:53:45,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424152149] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:53:45,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:53:45,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-13 22:53:45,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162023690] [2021-10-13 22:53:45,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:53:45,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:53:45,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:53:45,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:53:45,836 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:53:45,836 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1001 places, 2346 transitions, 142717 flow. Second operand has 23 states, 23 states have (on average 56.08695652173913) internal successors, (1290), 23 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:45,836 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:53:45,836 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:53:45,836 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:53:54,262 INFO L129 PetriNetUnfolder]: 1648/12437 cut-off events. [2021-10-13 22:53:54,262 INFO L130 PetriNetUnfolder]: For 834161/836558 co-relation queries the response was YES. [2021-10-13 22:53:54,487 INFO L84 FinitePrefix]: Finished finitePrefix Result has 110065 conditions, 12437 events. 1648/12437 cut-off events. For 834161/836558 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 177665 event pairs, 0 based on Foata normal form. 234/11341 useless extension candidates. Maximal degree in co-relation 109737. Up to 2117 conditions per place. [2021-10-13 22:53:54,558 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 806 selfloop transitions, 1622 changer transitions 17/2491 dead transitions. [2021-10-13 22:53:54,558 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1062 places, 2491 transitions, 158383 flow [2021-10-13 22:53:54,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-10-13 22:53:54,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-10-13 22:53:54,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 3920 transitions. [2021-10-13 22:53:54,560 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8477508650519031 [2021-10-13 22:53:54,560 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 3920 transitions. [2021-10-13 22:53:54,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 3920 transitions. [2021-10-13 22:53:54,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:53:54,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 3920 transitions. [2021-10-13 22:53:54,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 57.64705882352941) internal successors, (3920), 68 states have internal predecessors, (3920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:54,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 68.0) internal successors, (4692), 69 states have internal predecessors, (4692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:54,565 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 68.0) internal successors, (4692), 69 states have internal predecessors, (4692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:54,565 INFO L186 Difference]: Start difference. First operand has 1001 places, 2346 transitions, 142717 flow. Second operand 68 states and 3920 transitions. [2021-10-13 22:53:54,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1062 places, 2491 transitions, 158383 flow [2021-10-13 22:54:03,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1018 places, 2491 transitions, 155548 flow, removed 1204 selfloop flow, removed 44 redundant places. [2021-10-13 22:54:03,627 INFO L242 Difference]: Finished difference. Result has 1031 places, 2441 transitions, 151312 flow [2021-10-13 22:54:03,628 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=140120, PETRI_DIFFERENCE_MINUEND_PLACES=951, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1539, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=793, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=151312, PETRI_PLACES=1031, PETRI_TRANSITIONS=2441} [2021-10-13 22:54:03,628 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 963 predicate places. [2021-10-13 22:54:03,628 INFO L470 AbstractCegarLoop]: Abstraction has has 1031 places, 2441 transitions, 151312 flow [2021-10-13 22:54:03,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 56.08695652173913) internal successors, (1290), 23 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:03,629 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:54:03,629 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 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 22:54:03,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-10-13 22:54:03,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:54:03,843 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:54:03,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:54:03,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1474809461, now seen corresponding path program 46 times [2021-10-13 22:54:03,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:54:03,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447161137] [2021-10-13 22:54:03,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:54:03,844 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:54:03,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:54:03,946 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:54:03,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:54:03,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447161137] [2021-10-13 22:54:03,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447161137] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:54:03,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795749695] [2021-10-13 22:54:03,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:54:03,947 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:54:03,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:54:03,948 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 22:54:03,948 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 22:54:07,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:54:07,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:54:07,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:54:07,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:54:07,449 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:54:07,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795749695] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:54:07,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:54:07,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-13 22:54:07,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658781579] [2021-10-13 22:54:07,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:54:07,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:54:07,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:54:07,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:54:07,451 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:54:07,451 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1031 places, 2441 transitions, 151312 flow. Second operand has 23 states, 23 states have (on average 56.08695652173913) internal successors, (1290), 23 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:07,451 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:54:07,451 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:54:07,451 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:54:15,764 INFO L129 PetriNetUnfolder]: 1706/12817 cut-off events. [2021-10-13 22:54:15,764 INFO L130 PetriNetUnfolder]: For 897537/900260 co-relation queries the response was YES. [2021-10-13 22:54:16,000 INFO L84 FinitePrefix]: Finished finitePrefix Result has 116014 conditions, 12817 events. 1706/12817 cut-off events. For 897537/900260 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 184009 event pairs, 0 based on Foata normal form. 262/11710 useless extension candidates. Maximal degree in co-relation 115679. Up to 2133 conditions per place. [2021-10-13 22:54:16,079 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 879 selfloop transitions, 1652 changer transitions 17/2594 dead transitions. [2021-10-13 22:54:16,079 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1084 places, 2594 transitions, 167743 flow [2021-10-13 22:54:16,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-10-13 22:54:16,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-10-13 22:54:16,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3462 transitions. [2021-10-13 22:54:16,081 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8485294117647059 [2021-10-13 22:54:16,081 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3462 transitions. [2021-10-13 22:54:16,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3462 transitions. [2021-10-13 22:54:16,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:54:16,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3462 transitions. [2021-10-13 22:54:16,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 57.7) internal successors, (3462), 60 states have internal predecessors, (3462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:16,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 68.0) internal successors, (4148), 61 states have internal predecessors, (4148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:16,176 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 68.0) internal successors, (4148), 61 states have internal predecessors, (4148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:16,176 INFO L186 Difference]: Start difference. First operand has 1031 places, 2441 transitions, 151312 flow. Second operand 60 states and 3462 transitions. [2021-10-13 22:54:16,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1084 places, 2594 transitions, 167743 flow [2021-10-13 22:54:25,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1035 places, 2594 transitions, 165063 flow, removed 1088 selfloop flow, removed 49 redundant places. [2021-10-13 22:54:25,950 INFO L242 Difference]: Finished difference. Result has 1048 places, 2541 transitions, 160407 flow [2021-10-13 22:54:25,951 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=149278, PETRI_DIFFERENCE_MINUEND_PLACES=976, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1558, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=837, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=160407, PETRI_PLACES=1048, PETRI_TRANSITIONS=2541} [2021-10-13 22:54:25,951 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 980 predicate places. [2021-10-13 22:54:25,951 INFO L470 AbstractCegarLoop]: Abstraction has has 1048 places, 2541 transitions, 160407 flow [2021-10-13 22:54:25,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 56.08695652173913) internal successors, (1290), 23 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:25,951 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:54:25,951 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, 1, 1] [2021-10-13 22:54:25,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-10-13 22:54:26,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:54:26,167 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:54:26,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:54:26,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1663283745, now seen corresponding path program 47 times [2021-10-13 22:54:26,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:54:26,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957700718] [2021-10-13 22:54:26,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:54:26,168 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:54:26,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:54:26,279 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:54:26,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:54:26,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957700718] [2021-10-13 22:54:26,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957700718] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:54:26,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172706427] [2021-10-13 22:54:26,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:54:26,280 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:54:26,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:54:26,281 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 22:54:26,281 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 22:54:29,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-13 22:54:29,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:54:29,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:54:29,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:54:29,962 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:54:29,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172706427] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:54:29,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:54:29,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-13 22:54:29,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596243878] [2021-10-13 22:54:29,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:54:29,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:54:29,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:54:29,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:54:29,964 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:54:29,964 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1048 places, 2541 transitions, 160407 flow. Second operand has 23 states, 23 states have (on average 56.08695652173913) internal successors, (1290), 23 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:29,964 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:54:29,964 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:54:29,964 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:54:39,176 INFO L129 PetriNetUnfolder]: 1751/13139 cut-off events. [2021-10-13 22:54:39,176 INFO L130 PetriNetUnfolder]: For 939499/942329 co-relation queries the response was YES. [2021-10-13 22:54:39,538 INFO L84 FinitePrefix]: Finished finitePrefix Result has 120691 conditions, 13139 events. 1751/13139 cut-off events. For 939499/942329 co-relation queries the response was YES. Maximal size of possible extension queue 755. Compared 189620 event pairs, 0 based on Foata normal form. 322/12058 useless extension candidates. Maximal degree in co-relation 120349. Up to 2202 conditions per place. [2021-10-13 22:54:39,633 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 636 selfloop transitions, 1962 changer transitions 17/2661 dead transitions. [2021-10-13 22:54:39,634 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1106 places, 2661 transitions, 174496 flow [2021-10-13 22:54:39,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-10-13 22:54:39,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-10-13 22:54:39,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3749 transitions. [2021-10-13 22:54:39,642 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8481900452488688 [2021-10-13 22:54:39,642 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3749 transitions. [2021-10-13 22:54:39,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3749 transitions. [2021-10-13 22:54:39,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:54:39,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3749 transitions. [2021-10-13 22:54:39,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 57.676923076923075) internal successors, (3749), 65 states have internal predecessors, (3749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:39,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 68.0) internal successors, (4488), 66 states have internal predecessors, (4488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:39,647 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 68.0) internal successors, (4488), 66 states have internal predecessors, (4488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:39,647 INFO L186 Difference]: Start difference. First operand has 1048 places, 2541 transitions, 160407 flow. Second operand 65 states and 3749 transitions. [2021-10-13 22:54:39,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1106 places, 2661 transitions, 174496 flow [2021-10-13 22:54:50,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1064 places, 2661 transitions, 173155 flow, removed 446 selfloop flow, removed 42 redundant places. [2021-10-13 22:54:50,281 INFO L242 Difference]: Finished difference. Result has 1076 places, 2613 transitions, 169533 flow [2021-10-13 22:54:50,283 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=159078, PETRI_DIFFERENCE_MINUEND_PLACES=1000, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1897, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=169533, PETRI_PLACES=1076, PETRI_TRANSITIONS=2613} [2021-10-13 22:54:50,283 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 1008 predicate places. [2021-10-13 22:54:50,283 INFO L470 AbstractCegarLoop]: Abstraction has has 1076 places, 2613 transitions, 169533 flow [2021-10-13 22:54:50,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 56.08695652173913) internal successors, (1290), 23 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:50,283 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:54:50,284 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, 1, 1] [2021-10-13 22:54:50,310 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 22:54:50,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:54:50,491 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:54:50,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:54:50,491 INFO L82 PathProgramCache]: Analyzing trace with hash 230828137, now seen corresponding path program 48 times [2021-10-13 22:54:50,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:54:50,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747553620] [2021-10-13 22:54:50,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:54:50,492 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:54:50,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:54:50,621 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:54:50,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:54:50,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747553620] [2021-10-13 22:54:50,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747553620] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:54:50,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936684707] [2021-10-13 22:54:50,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:54:50,622 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:54:50,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:54:50,623 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 22:54:50,623 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 22:54:53,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-13 22:54:53,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:54:53,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:54:53,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:54:54,202 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:54:54,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936684707] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:54:54,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:54:54,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-13 22:54:54,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093076259] [2021-10-13 22:54:54,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:54:54,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:54:54,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:54:54,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:54:54,204 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:54:54,204 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1076 places, 2613 transitions, 169533 flow. Second operand has 23 states, 23 states have (on average 56.08695652173913) internal successors, (1290), 23 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:54,204 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:54:54,204 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:54:54,204 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:55:03,793 INFO L129 PetriNetUnfolder]: 1868/14004 cut-off events. [2021-10-13 22:55:03,793 INFO L130 PetriNetUnfolder]: For 1046673/1050034 co-relation queries the response was YES. [2021-10-13 22:55:04,073 INFO L84 FinitePrefix]: Finished finitePrefix Result has 132093 conditions, 14004 events. 1868/14004 cut-off events. For 1046673/1050034 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 203499 event pairs, 0 based on Foata normal form. 434/12943 useless extension candidates. Maximal degree in co-relation 131744. Up to 2393 conditions per place. [2021-10-13 22:55:04,253 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 526 selfloop transitions, 2243 changer transitions 22/2837 dead transitions. [2021-10-13 22:55:04,254 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1148 places, 2837 transitions, 191629 flow [2021-10-13 22:55:04,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-10-13 22:55:04,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-10-13 22:55:04,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 4556 transitions. [2021-10-13 22:55:04,256 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8481012658227848 [2021-10-13 22:55:04,256 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 4556 transitions. [2021-10-13 22:55:04,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 4556 transitions. [2021-10-13 22:55:04,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:55:04,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 4556 transitions. [2021-10-13 22:55:04,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 57.67088607594937) internal successors, (4556), 79 states have internal predecessors, (4556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:04,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 68.0) internal successors, (5440), 80 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:04,267 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 68.0) internal successors, (5440), 80 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:04,267 INFO L186 Difference]: Start difference. First operand has 1076 places, 2613 transitions, 169533 flow. Second operand 79 states and 4556 transitions. [2021-10-13 22:55:04,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1148 places, 2837 transitions, 191629 flow [2021-10-13 22:55:16,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1101 places, 2837 transitions, 188691 flow, removed 1114 selfloop flow, removed 47 redundant places. [2021-10-13 22:55:16,178 INFO L242 Difference]: Finished difference. Result has 1117 places, 2780 transitions, 184581 flow [2021-10-13 22:55:16,179 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=166943, PETRI_DIFFERENCE_MINUEND_PLACES=1023, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2090, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=184581, PETRI_PLACES=1117, PETRI_TRANSITIONS=2780} [2021-10-13 22:55:16,179 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 1049 predicate places. [2021-10-13 22:55:16,180 INFO L470 AbstractCegarLoop]: Abstraction has has 1117 places, 2780 transitions, 184581 flow [2021-10-13 22:55:16,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 56.08695652173913) internal successors, (1290), 23 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:16,180 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:55:16,180 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, 1, 1] [2021-10-13 22:55:16,205 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 22:55:16,383 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,SelfDestructingSolverStorable84 [2021-10-13 22:55:16,384 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:55:16,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:55:16,384 INFO L82 PathProgramCache]: Analyzing trace with hash 998500937, now seen corresponding path program 49 times [2021-10-13 22:55:16,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:55:16,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262798369] [2021-10-13 22:55:16,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:55:16,384 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:55:16,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:55:16,496 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:55:16,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:55:16,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262798369] [2021-10-13 22:55:16,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262798369] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:55:16,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369668270] [2021-10-13 22:55:16,496 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:55:16,497 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:55:16,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:55:16,497 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 22:55:16,498 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 22:55:19,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:55:19,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:55:19,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:55:20,247 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:55:20,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369668270] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:55:20,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:55:20,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-13 22:55:20,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549698458] [2021-10-13 22:55:20,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:55:20,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:55:20,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:55:20,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:55:20,249 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:55:20,249 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1117 places, 2780 transitions, 184581 flow. Second operand has 23 states, 23 states have (on average 56.08695652173913) internal successors, (1290), 23 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:20,250 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:55:20,250 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:55:20,250 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:55:32,668 INFO L129 PetriNetUnfolder]: 1908/14268 cut-off events. [2021-10-13 22:55:32,668 INFO L130 PetriNetUnfolder]: For 1093848/1097388 co-relation queries the response was YES. [2021-10-13 22:55:32,948 INFO L84 FinitePrefix]: Finished finitePrefix Result has 137690 conditions, 14268 events. 1908/14268 cut-off events. For 1093848/1097388 co-relation queries the response was YES. Maximal size of possible extension queue 803. Compared 208219 event pairs, 0 based on Foata normal form. 376/13122 useless extension candidates. Maximal degree in co-relation 137331. Up to 2348 conditions per place. [2021-10-13 22:55:33,042 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 677 selfloop transitions, 2169 changer transitions 17/2909 dead transitions. [2021-10-13 22:55:33,042 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1186 places, 2909 transitions, 200456 flow [2021-10-13 22:55:33,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-10-13 22:55:33,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-10-13 22:55:33,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 4496 transitions. [2021-10-13 22:55:33,045 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8476621417797888 [2021-10-13 22:55:33,045 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 4496 transitions. [2021-10-13 22:55:33,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 4496 transitions. [2021-10-13 22:55:33,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:55:33,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 4496 transitions. [2021-10-13 22:55:33,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 57.64102564102564) internal successors, (4496), 78 states have internal predecessors, (4496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:33,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 68.0) internal successors, (5372), 79 states have internal predecessors, (5372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:33,051 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 68.0) internal successors, (5372), 79 states have internal predecessors, (5372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:33,051 INFO L186 Difference]: Start difference. First operand has 1117 places, 2780 transitions, 184581 flow. Second operand 78 states and 4496 transitions. [2021-10-13 22:55:33,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1186 places, 2909 transitions, 200456 flow [2021-10-13 22:55:47,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1130 places, 2909 transitions, 196034 flow, removed 1806 selfloop flow, removed 56 redundant places. [2021-10-13 22:55:47,499 INFO L242 Difference]: Finished difference. Result has 1142 places, 2854 transitions, 191988 flow [2021-10-13 22:55:47,501 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=180485, PETRI_DIFFERENCE_MINUEND_PLACES=1053, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=191988, PETRI_PLACES=1142, PETRI_TRANSITIONS=2854} [2021-10-13 22:55:47,501 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 1074 predicate places. [2021-10-13 22:55:47,501 INFO L470 AbstractCegarLoop]: Abstraction has has 1142 places, 2854 transitions, 191988 flow [2021-10-13 22:55:47,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 56.08695652173913) internal successors, (1290), 23 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:47,501 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:55:47,501 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, 1, 1] [2021-10-13 22:55:47,526 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 22:55:47,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-10-13 22:55:47,719 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:55:47,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:55:47,720 INFO L82 PathProgramCache]: Analyzing trace with hash 419253249, now seen corresponding path program 50 times [2021-10-13 22:55:47,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:55:47,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629553619] [2021-10-13 22:55:47,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:55:47,720 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:55:47,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:55:47,828 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:55:47,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:55:47,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629553619] [2021-10-13 22:55:47,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629553619] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:55:47,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085847192] [2021-10-13 22:55:47,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:55:47,828 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:55:47,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:55:47,829 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 22:55:47,831 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 22:55:51,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:55:51,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:55:51,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:55:51,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:55:51,569 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:55:51,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085847192] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:55:51,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:55:51,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-13 22:55:51,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009071036] [2021-10-13 22:55:51,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:55:51,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:55:51,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:55:51,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:55:51,571 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:55:51,571 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1142 places, 2854 transitions, 191988 flow. Second operand has 23 states, 23 states have (on average 56.08695652173913) internal successors, (1290), 23 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:51,571 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:55:51,571 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:55:51,571 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:56:03,848 INFO L129 PetriNetUnfolder]: 1951/14587 cut-off events. [2021-10-13 22:56:03,848 INFO L130 PetriNetUnfolder]: For 1146226/1150101 co-relation queries the response was YES. [2021-10-13 22:56:04,267 INFO L84 FinitePrefix]: Finished finitePrefix Result has 142725 conditions, 14587 events. 1951/14587 cut-off events. For 1146226/1150101 co-relation queries the response was YES. Maximal size of possible extension queue 809. Compared 213408 event pairs, 0 based on Foata normal form. 350/13381 useless extension candidates. Maximal degree in co-relation 142362. Up to 2429 conditions per place. [2021-10-13 22:56:04,370 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 727 selfloop transitions, 2181 changer transitions 17/2971 dead transitions. [2021-10-13 22:56:04,370 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1211 places, 2971 transitions, 207738 flow [2021-10-13 22:56:04,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-10-13 22:56:04,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-10-13 22:56:04,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 4381 transitions. [2021-10-13 22:56:04,372 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8477167182662538 [2021-10-13 22:56:04,372 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 4381 transitions. [2021-10-13 22:56:04,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 4381 transitions. [2021-10-13 22:56:04,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:56:04,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 4381 transitions. [2021-10-13 22:56:04,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 57.64473684210526) internal successors, (4381), 76 states have internal predecessors, (4381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:56:04,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 68.0) internal successors, (5236), 77 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:56:04,378 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 68.0) internal successors, (5236), 77 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:56:04,378 INFO L186 Difference]: Start difference. First operand has 1142 places, 2854 transitions, 191988 flow. Second operand 76 states and 4381 transitions. [2021-10-13 22:56:04,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1211 places, 2971 transitions, 207738 flow [2021-10-13 22:56:18,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1153 places, 2971 transitions, 205364 flow, removed 791 selfloop flow, removed 58 redundant places. [2021-10-13 22:56:18,726 INFO L242 Difference]: Finished difference. Result has 1165 places, 2914 transitions, 200859 flow [2021-10-13 22:56:18,728 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=189630, PETRI_DIFFERENCE_MINUEND_PLACES=1078, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2854, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=707, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=200859, PETRI_PLACES=1165, PETRI_TRANSITIONS=2914} [2021-10-13 22:56:18,728 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 1097 predicate places. [2021-10-13 22:56:18,728 INFO L470 AbstractCegarLoop]: Abstraction has has 1165 places, 2914 transitions, 200859 flow [2021-10-13 22:56:18,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 56.08695652173913) internal successors, (1290), 23 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:56:18,728 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:56:18,728 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, 1, 1] [2021-10-13 22:56:18,757 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 22:56:18,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-10-13 22:56:18,956 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:56:18,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:56:18,956 INFO L82 PathProgramCache]: Analyzing trace with hash 158550601, now seen corresponding path program 51 times [2021-10-13 22:56:18,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:56:18,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635287730] [2021-10-13 22:56:18,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:56:18,956 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:56:19,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:56:19,130 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:56:19,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:56:19,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635287730] [2021-10-13 22:56:19,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635287730] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:56:19,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617552172] [2021-10-13 22:56:19,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:56:19,131 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:56:19,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:56:19,132 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 22:56:19,133 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 22:56:22,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 22:56:22,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:56:22,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:56:22,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:56:22,849 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:56:22,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617552172] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:56:22,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:56:22,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-13 22:56:22,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213522042] [2021-10-13 22:56:22,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:56:22,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:56:22,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:56:22,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:56:22,850 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:56:22,851 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1165 places, 2914 transitions, 200859 flow. Second operand has 23 states, 23 states have (on average 56.08695652173913) internal successors, (1290), 23 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:56:22,851 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:56:22,851 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:56:22,851 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:56:35,249 INFO L129 PetriNetUnfolder]: 2015/15093 cut-off events. [2021-10-13 22:56:35,250 INFO L130 PetriNetUnfolder]: For 1226762/1230629 co-relation queries the response was YES. [2021-10-13 22:56:35,578 INFO L84 FinitePrefix]: Finished finitePrefix Result has 150888 conditions, 15093 events. 2015/15093 cut-off events. For 1226762/1230629 co-relation queries the response was YES. Maximal size of possible extension queue 821. Compared 221012 event pairs, 0 based on Foata normal form. 274/13756 useless extension candidates. Maximal degree in co-relation 150518. Up to 2520 conditions per place. [2021-10-13 22:56:35,679 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 1211 selfloop transitions, 1799 changer transitions 17/3073 dead transitions. [2021-10-13 22:56:35,680 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1223 places, 3073 transitions, 219784 flow [2021-10-13 22:56:35,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-10-13 22:56:35,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-10-13 22:56:35,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3748 transitions. [2021-10-13 22:56:35,765 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8479638009049774 [2021-10-13 22:56:35,765 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3748 transitions. [2021-10-13 22:56:35,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3748 transitions. [2021-10-13 22:56:35,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:56:35,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3748 transitions. [2021-10-13 22:56:35,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 57.66153846153846) internal successors, (3748), 65 states have internal predecessors, (3748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:56:35,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 68.0) internal successors, (4488), 66 states have internal predecessors, (4488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:56:35,770 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 68.0) internal successors, (4488), 66 states have internal predecessors, (4488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:56:35,770 INFO L186 Difference]: Start difference. First operand has 1165 places, 2914 transitions, 200859 flow. Second operand 65 states and 3748 transitions. [2021-10-13 22:56:35,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1223 places, 3073 transitions, 219784 flow [2021-10-13 22:56:51,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1169 places, 3073 transitions, 217976 flow, removed 578 selfloop flow, removed 54 redundant places. [2021-10-13 22:56:51,987 INFO L242 Difference]: Finished difference. Result has 1181 places, 3018 transitions, 212291 flow [2021-10-13 22:56:51,989 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=199095, PETRI_DIFFERENCE_MINUEND_PLACES=1105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2914, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1708, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=212291, PETRI_PLACES=1181, PETRI_TRANSITIONS=3018} [2021-10-13 22:56:51,989 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 1113 predicate places. [2021-10-13 22:56:51,989 INFO L470 AbstractCegarLoop]: Abstraction has has 1181 places, 3018 transitions, 212291 flow [2021-10-13 22:56:51,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 56.08695652173913) internal successors, (1290), 23 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:56:51,990 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:56:51,990 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, 1, 1] [2021-10-13 22:56:52,018 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 22:56:52,207 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,SelfDestructingSolverStorable87 [2021-10-13 22:56:52,207 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:56:52,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:56:52,208 INFO L82 PathProgramCache]: Analyzing trace with hash -311070977, now seen corresponding path program 52 times [2021-10-13 22:56:52,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:56:52,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774931202] [2021-10-13 22:56:52,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:56:52,208 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:56:52,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:56:52,367 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:56:52,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:56:52,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774931202] [2021-10-13 22:56:52,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774931202] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:56:52,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676111953] [2021-10-13 22:56:52,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:56:52,369 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:56:52,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:56:52,378 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 22:56:52,419 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 22:56:55,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:56:55,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:56:55,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:56:55,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:56:56,140 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:56:56,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676111953] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:56:56,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:56:56,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-13 22:56:56,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016352539] [2021-10-13 22:56:56,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:56:56,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:56:56,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:56:56,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:56:56,141 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:56:56,142 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1181 places, 3018 transitions, 212291 flow. Second operand has 23 states, 23 states have (on average 56.08695652173913) internal successors, (1290), 23 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:56:56,142 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:56:56,142 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:56:56,142 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:57:08,965 INFO L129 PetriNetUnfolder]: 2093/15665 cut-off events. [2021-10-13 22:57:08,965 INFO L130 PetriNetUnfolder]: For 1323401/1327618 co-relation queries the response was YES. [2021-10-13 22:57:09,291 INFO L84 FinitePrefix]: Finished finitePrefix Result has 159449 conditions, 15665 events. 2093/15665 cut-off events. For 1323401/1327618 co-relation queries the response was YES. Maximal size of possible extension queue 858. Compared 231008 event pairs, 0 based on Foata normal form. 360/14353 useless extension candidates. Maximal degree in co-relation 159073. Up to 2659 conditions per place. [2021-10-13 22:57:09,547 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 923 selfloop transitions, 2221 changer transitions 17/3207 dead transitions. [2021-10-13 22:57:09,547 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1243 places, 3207 transitions, 233561 flow [2021-10-13 22:57:09,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-10-13 22:57:09,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-10-13 22:57:09,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 3979 transitions. [2021-10-13 22:57:09,549 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8480392156862745 [2021-10-13 22:57:09,549 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 3979 transitions. [2021-10-13 22:57:09,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 3979 transitions. [2021-10-13 22:57:09,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:57:09,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 3979 transitions. [2021-10-13 22:57:09,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 57.666666666666664) internal successors, (3979), 69 states have internal predecessors, (3979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:57:09,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 68.0) internal successors, (4760), 70 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:57:09,555 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 68.0) internal successors, (4760), 70 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:57:09,555 INFO L186 Difference]: Start difference. First operand has 1181 places, 3018 transitions, 212291 flow. Second operand 69 states and 3979 transitions. [2021-10-13 22:57:09,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1243 places, 3207 transitions, 233561 flow [2021-10-13 22:57:27,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1192 places, 3207 transitions, 231094 flow, removed 816 selfloop flow, removed 51 redundant places. [2021-10-13 22:57:27,260 INFO L242 Difference]: Finished difference. Result has 1205 places, 3136 transitions, 225433 flow [2021-10-13 22:57:27,262 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=209842, PETRI_DIFFERENCE_MINUEND_PLACES=1124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3018, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=849, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=225433, PETRI_PLACES=1205, PETRI_TRANSITIONS=3136} [2021-10-13 22:57:27,262 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 1137 predicate places. [2021-10-13 22:57:27,262 INFO L470 AbstractCegarLoop]: Abstraction has has 1205 places, 3136 transitions, 225433 flow [2021-10-13 22:57:27,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 56.08695652173913) internal successors, (1290), 23 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:57:27,262 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:57:27,262 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, 1, 1] [2021-10-13 22:57:27,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-10-13 22:57:27,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:57:27,475 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:57:27,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:57:27,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1904328215, now seen corresponding path program 53 times [2021-10-13 22:57:27,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:57:27,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944151796] [2021-10-13 22:57:27,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:57:27,476 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:57:27,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:57:27,589 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:57:27,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:57:27,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944151796] [2021-10-13 22:57:27,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944151796] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:57:27,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439932998] [2021-10-13 22:57:27,589 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:57:27,589 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:57:27,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:57:27,590 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 22:57:27,590 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 22:57:30,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 22:57:30,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:57:30,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:57:30,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:57:31,153 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:57:31,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439932998] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:57:31,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:57:31,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-13 22:57:31,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558750355] [2021-10-13 22:57:31,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:57:31,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:57:31,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:57:31,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:57:31,155 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:57:31,155 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1205 places, 3136 transitions, 225433 flow. Second operand has 23 states, 23 states have (on average 56.08695652173913) internal successors, (1290), 23 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:57:31,155 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:57:31,155 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:57:31,155 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:57:45,106 INFO L129 PetriNetUnfolder]: 2136/15948 cut-off events. [2021-10-13 22:57:45,107 INFO L130 PetriNetUnfolder]: For 1398841/1403279 co-relation queries the response was YES. [2021-10-13 22:57:45,425 INFO L84 FinitePrefix]: Finished finitePrefix Result has 165961 conditions, 15948 events. 2136/15948 cut-off events. For 1398841/1403279 co-relation queries the response was YES. Maximal size of possible extension queue 865. Compared 236017 event pairs, 0 based on Foata normal form. 318/14565 useless extension candidates. Maximal degree in co-relation 165577. Up to 2714 conditions per place. [2021-10-13 22:57:45,648 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 1161 selfloop transitions, 2050 changer transitions 17/3274 dead transitions. [2021-10-13 22:57:45,648 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1263 places, 3274 transitions, 243357 flow [2021-10-13 22:57:45,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-10-13 22:57:45,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-10-13 22:57:45,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3748 transitions. [2021-10-13 22:57:45,650 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8479638009049774 [2021-10-13 22:57:45,650 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3748 transitions. [2021-10-13 22:57:45,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3748 transitions. [2021-10-13 22:57:45,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:57:45,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3748 transitions. [2021-10-13 22:57:45,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 57.66153846153846) internal successors, (3748), 65 states have internal predecessors, (3748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:57:45,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 68.0) internal successors, (4488), 66 states have internal predecessors, (4488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:57:45,655 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 68.0) internal successors, (4488), 66 states have internal predecessors, (4488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:57:45,655 INFO L186 Difference]: Start difference. First operand has 1205 places, 3136 transitions, 225433 flow. Second operand 65 states and 3748 transitions. [2021-10-13 22:57:45,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1263 places, 3274 transitions, 243357 flow [2021-10-13 22:58:03,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1215 places, 3274 transitions, 241793 flow, removed 502 selfloop flow, removed 48 redundant places. [2021-10-13 22:58:03,257 INFO L242 Difference]: Finished difference. Result has 1227 places, 3213 transitions, 235875 flow [2021-10-13 22:58:03,279 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=223887, PETRI_DIFFERENCE_MINUEND_PLACES=1151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1980, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=235875, PETRI_PLACES=1227, PETRI_TRANSITIONS=3213} [2021-10-13 22:58:03,279 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 1159 predicate places. [2021-10-13 22:58:03,280 INFO L470 AbstractCegarLoop]: Abstraction has has 1227 places, 3213 transitions, 235875 flow [2021-10-13 22:58:03,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 56.08695652173913) internal successors, (1290), 23 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:58:03,280 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:58:03,280 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, 1, 1] [2021-10-13 22:58:03,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-10-13 22:58:03,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:58:03,503 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:58:03,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:58:03,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1394071563, now seen corresponding path program 54 times [2021-10-13 22:58:03,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:58:03,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883146309] [2021-10-13 22:58:03,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:58:03,504 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:58:03,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:58:03,678 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:58:03,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:58:03,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883146309] [2021-10-13 22:58:03,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883146309] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:58:03,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524706624] [2021-10-13 22:58:03,679 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:58:03,679 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:58:03,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:58:03,692 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 22:58:03,755 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 22:58:07,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-13 22:58:07,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:58:07,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:58:07,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:58:07,533 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:58:07,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524706624] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:58:07,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:58:07,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-13 22:58:07,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636207926] [2021-10-13 22:58:07,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:58:07,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:58:07,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:58:07,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:58:07,534 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:58:07,535 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1227 places, 3213 transitions, 235875 flow. Second operand has 23 states, 23 states have (on average 56.08695652173913) internal successors, (1290), 23 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:58:07,535 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:58:07,535 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:58:07,535 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:58:21,717 INFO L129 PetriNetUnfolder]: 2203/16409 cut-off events. [2021-10-13 22:58:21,717 INFO L130 PetriNetUnfolder]: For 1507521/1512718 co-relation queries the response was YES. [2021-10-13 22:58:22,097 INFO L84 FinitePrefix]: Finished finitePrefix Result has 174730 conditions, 16409 events. 2203/16409 cut-off events. For 1507521/1512718 co-relation queries the response was YES. Maximal size of possible extension queue 887. Compared 243721 event pairs, 0 based on Foata normal form. 384/15044 useless extension candidates. Maximal degree in co-relation 174339. Up to 2827 conditions per place. [2021-10-13 22:58:22,328 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 1250 selfloop transitions, 2072 changer transitions 17/3385 dead transitions. [2021-10-13 22:58:22,328 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1296 places, 3385 transitions, 257166 flow [2021-10-13 22:58:22,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-10-13 22:58:22,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-10-13 22:58:22,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 4381 transitions. [2021-10-13 22:58:22,331 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8477167182662538 [2021-10-13 22:58:22,331 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 4381 transitions. [2021-10-13 22:58:22,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 4381 transitions. [2021-10-13 22:58:22,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:58:22,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 4381 transitions. [2021-10-13 22:58:22,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 57.64473684210526) internal successors, (4381), 76 states have internal predecessors, (4381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:58:22,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 68.0) internal successors, (5236), 77 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:58:22,337 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 68.0) internal successors, (5236), 77 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:58:22,337 INFO L186 Difference]: Start difference. First operand has 1227 places, 3213 transitions, 235875 flow. Second operand 76 states and 4381 transitions. [2021-10-13 22:58:22,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1296 places, 3385 transitions, 257166 flow [2021-10-13 22:58:42,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1256 places, 3385 transitions, 255501 flow, removed 523 selfloop flow, removed 40 redundant places. [2021-10-13 22:58:42,938 INFO L242 Difference]: Finished difference. Result has 1268 places, 3321 transitions, 249239 flow [2021-10-13 22:58:42,940 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=234342, PETRI_DIFFERENCE_MINUEND_PLACES=1181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1978, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=249239, PETRI_PLACES=1268, PETRI_TRANSITIONS=3321} [2021-10-13 22:58:42,940 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 1200 predicate places. [2021-10-13 22:58:42,940 INFO L470 AbstractCegarLoop]: Abstraction has has 1268 places, 3321 transitions, 249239 flow [2021-10-13 22:58:42,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 56.08695652173913) internal successors, (1290), 23 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:58:42,940 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:58:42,940 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 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 22:58:42,968 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 22:58:43,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:58:43,156 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:58:43,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:58:43,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1452952947, now seen corresponding path program 55 times [2021-10-13 22:58:43,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:58:43,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929024238] [2021-10-13 22:58:43,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:58:43,156 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:58:43,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:58:43,306 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:58:43,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:58:43,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929024238] [2021-10-13 22:58:43,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929024238] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:58:43,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305399203] [2021-10-13 22:58:43,306 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:58:43,306 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:58:43,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:58:43,307 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 22:58:43,308 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 22:58:46,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:58:46,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:58:46,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:58:46,893 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:58:46,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305399203] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:58:46,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:58:46,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-13 22:58:46,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998349951] [2021-10-13 22:58:46,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:58:46,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:58:46,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:58:46,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:58:46,894 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:58:46,894 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1268 places, 3321 transitions, 249239 flow. Second operand has 23 states, 23 states have (on average 56.08695652173913) internal successors, (1290), 23 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:58:46,895 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:58:46,895 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:58:46,895 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:59:02,490 INFO L129 PetriNetUnfolder]: 2241/16658 cut-off events. [2021-10-13 22:59:02,490 INFO L130 PetriNetUnfolder]: For 1621459/1627289 co-relation queries the response was YES. [2021-10-13 22:59:02,945 INFO L84 FinitePrefix]: Finished finitePrefix Result has 181217 conditions, 16658 events. 2241/16658 cut-off events. For 1621459/1627289 co-relation queries the response was YES. Maximal size of possible extension queue 895. Compared 246972 event pairs, 0 based on Foata normal form. 247/15129 useless extension candidates. Maximal degree in co-relation 180819. Up to 3129 conditions per place. [2021-10-13 22:59:03,055 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 2157 selfloop transitions, 1220 changer transitions 25/3448 dead transitions. [2021-10-13 22:59:03,055 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1335 places, 3448 transitions, 267456 flow [2021-10-13 22:59:03,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-10-13 22:59:03,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-10-13 22:59:03,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 4269 transitions. [2021-10-13 22:59:03,057 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8483704292527822 [2021-10-13 22:59:03,057 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 4269 transitions. [2021-10-13 22:59:03,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 4269 transitions. [2021-10-13 22:59:03,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:59:03,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 4269 transitions. [2021-10-13 22:59:03,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 57.689189189189186) internal successors, (4269), 74 states have internal predecessors, (4269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:59:03,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 68.0) internal successors, (5100), 75 states have internal predecessors, (5100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:59:03,062 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 68.0) internal successors, (5100), 75 states have internal predecessors, (5100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:59:03,062 INFO L186 Difference]: Start difference. First operand has 1268 places, 3321 transitions, 249239 flow. Second operand 74 states and 4269 transitions. [2021-10-13 22:59:03,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1335 places, 3448 transitions, 267456 flow