/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-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-231806ee773fbd0554de777ff4074f5592c67ff4-231806e [2021-10-13 22:45:38,021 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 22:45:38,022 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 22:45:38,065 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 22:45:38,065 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 22:45:38,066 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 22:45:38,067 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 22:45:38,068 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 22:45:38,069 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 22:45:38,069 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 22:45:38,070 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 22:45:38,070 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 22:45:38,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 22:45:38,071 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 22:45:38,072 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 22:45:38,073 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 22:45:38,073 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 22:45:38,074 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 22:45:38,075 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 22:45:38,092 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 22:45:38,093 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 22:45:38,094 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 22:45:38,095 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 22:45:38,095 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 22:45:38,097 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 22:45:38,097 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 22:45:38,097 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 22:45:38,098 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 22:45:38,098 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 22:45:38,098 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 22:45:38,098 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 22:45:38,099 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 22:45:38,099 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 22:45:38,100 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 22:45:38,100 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 22:45:38,101 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 22:45:38,101 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 22:45:38,101 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 22:45:38,101 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 22:45:38,102 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 22:45:38,102 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 22:45:38,103 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 22:45:38,118 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 22:45:38,118 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 22:45:38,120 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 22:45:38,120 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 22:45:38,120 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 22:45:38,120 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 22:45:38,120 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 22:45:38,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 22:45:38,121 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 22:45:38,121 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 22:45:38,121 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 22:45:38,121 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 22:45:38,121 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 22:45:38,121 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 22:45:38,121 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 22:45:38,121 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 22:45:38,121 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 22:45:38,121 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 22:45:38,121 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 22:45:38,122 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-10-13 22:45:38,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 22:45:38,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 22:45:38,122 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 22:45:38,122 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 22:45:38,122 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 22:45:38,122 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 22:45:38,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 22:45:38,122 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-13 22:45:38,123 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-13 22:45:38,123 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-13 22:45:38,309 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 22:45:38,325 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 22:45:38,327 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 22:45:38,327 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 22:45:38,328 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 22:45:38,328 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2021-10-13 22:45:38,388 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/babc1ce61/87fc6f24f5df4529a6e5b5a5c841e561/FLAGf141b4cc7 [2021-10-13 22:45:38,783 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 22:45:38,784 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2021-10-13 22:45:38,796 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/babc1ce61/87fc6f24f5df4529a6e5b5a5c841e561/FLAGf141b4cc7 [2021-10-13 22:45:38,804 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/babc1ce61/87fc6f24f5df4529a6e5b5a5c841e561 [2021-10-13 22:45:38,809 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 22:45:38,809 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 22:45:38,815 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 22:45:38,816 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 22:45:38,818 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 22:45:38,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:45:38" (1/1) ... [2021-10-13 22:45:38,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e494cee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:45:38, skipping insertion in model container [2021-10-13 22:45:38,819 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:45:38" (1/1) ... [2021-10-13 22:45:38,824 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 22:45:38,848 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 22:45:39,080 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-2.i[30286,30299] [2021-10-13 22:45:39,094 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-2.i[31040,31053] [2021-10-13 22:45:39,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 22:45:39,103 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 22:45:39,134 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-2.i[30286,30299] [2021-10-13 22:45:39,143 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-2.i[31040,31053] [2021-10-13 22:45:39,146 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 22:45:39,172 INFO L208 MainTranslator]: Completed translation [2021-10-13 22:45:39,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:45:39 WrapperNode [2021-10-13 22:45:39,173 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 22:45:39,174 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 22:45:39,174 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 22:45:39,174 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 22:45:39,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:45:39" (1/1) ... [2021-10-13 22:45:39,202 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:45:39" (1/1) ... [2021-10-13 22:45:39,218 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 22:45:39,219 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 22:45:39,219 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 22:45:39,219 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 22:45:39,224 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:45:39" (1/1) ... [2021-10-13 22:45:39,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:45:39" (1/1) ... [2021-10-13 22:45:39,229 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:45:39" (1/1) ... [2021-10-13 22:45:39,229 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:45:39" (1/1) ... [2021-10-13 22:45:39,244 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:45:39" (1/1) ... [2021-10-13 22:45:39,246 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:45:39" (1/1) ... [2021-10-13 22:45:39,247 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:45:39" (1/1) ... [2021-10-13 22:45:39,248 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 22:45:39,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 22:45:39,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 22:45:39,249 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 22:45:39,251 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:45:39" (1/1) ... [2021-10-13 22:45:39,255 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 22:45:39,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:45:39,270 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 22:45:39,282 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 22:45:39,309 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-10-13 22:45:39,311 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-10-13 22:45:39,311 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-10-13 22:45:39,311 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-10-13 22:45:39,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 22:45:39,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-13 22:45:39,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 22:45:39,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 22:45:39,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 22:45:39,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-13 22:45:39,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 22:45:39,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 22:45:39,312 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 22:45:39,480 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 22:45:39,480 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-13 22:45:39,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:45:39 BoogieIcfgContainer [2021-10-13 22:45:39,482 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 22:45:39,483 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 22:45:39,483 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 22:45:39,485 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 22:45:39,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:45:38" (1/3) ... [2021-10-13 22:45:39,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51b52a74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:45:39, skipping insertion in model container [2021-10-13 22:45:39,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:45:39" (2/3) ... [2021-10-13 22:45:39,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51b52a74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:45:39, skipping insertion in model container [2021-10-13 22:45:39,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:45:39" (3/3) ... [2021-10-13 22:45:39,487 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-2.i [2021-10-13 22:45:39,490 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 22:45:39,490 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 22:45:39,490 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-13 22:45:39,517 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,518 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,518 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,518 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,518 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,518 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,518 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,519 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,519 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,519 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,519 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,519 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,519 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,520 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,520 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,520 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,520 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,520 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,520 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,521 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,521 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,521 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,521 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,521 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,527 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,527 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,527 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,527 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,527 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,528 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,528 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,528 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,528 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,528 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,528 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,529 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,529 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,529 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,529 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,529 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,529 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,529 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,529 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,530 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,530 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,530 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,530 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,530 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,530 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,530 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,531 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,531 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,531 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,531 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,531 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,531 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,531 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,531 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,532 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,532 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,538 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,538 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,539 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,539 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,539 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,539 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,543 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,544 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,544 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,555 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,555 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,555 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:45:39,557 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-10-13 22:45:39,586 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 22:45:39,590 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 22:45:39,591 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-13 22:45:39,598 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 70 places, 68 transitions, 146 flow [2021-10-13 22:45:39,623 INFO L129 PetriNetUnfolder]: 5/66 cut-off events. [2021-10-13 22:45:39,623 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-13 22:45:39,626 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 22:45:39,626 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 68 transitions, 146 flow [2021-10-13 22:45:39,630 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 66 transitions, 138 flow [2021-10-13 22:45:39,650 INFO L129 PetriNetUnfolder]: 3/53 cut-off events. [2021-10-13 22:45:39,650 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-13 22:45:39,650 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:39,651 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 22:45:39,651 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:39,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:39,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1527992754, now seen corresponding path program 1 times [2021-10-13 22:45:39,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:39,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707423146] [2021-10-13 22:45:39,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:39,666 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:39,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:40,002 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 22:45:40,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:40,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707423146] [2021-10-13 22:45:40,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707423146] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 22:45:40,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 22:45:40,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 22:45:40,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390538689] [2021-10-13 22:45:40,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 22:45:40,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:40,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 22:45:40,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-13 22:45:40,035 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:40,039 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 22:45:40,039 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:40,039 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:40,040 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:40,182 INFO L129 PetriNetUnfolder]: 44/203 cut-off events. [2021-10-13 22:45:40,182 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-13 22:45:40,184 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 22:45:40,186 INFO L132 encePairwiseOnDemand]: 57/68 looper letters, 11 selfloop transitions, 9 changer transitions 23/89 dead transitions. [2021-10-13 22:45:40,186 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 89 transitions, 256 flow [2021-10-13 22:45:40,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 22:45:40,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-13 22:45:40,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 610 transitions. [2021-10-13 22:45:40,201 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8970588235294118 [2021-10-13 22:45:40,201 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 610 transitions. [2021-10-13 22:45:40,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 610 transitions. [2021-10-13 22:45:40,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:40,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 610 transitions. [2021-10-13 22:45:40,209 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 22:45:40,215 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 22:45:40,215 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 22:45:40,217 INFO L186 Difference]: Start difference. First operand has 68 places, 66 transitions, 138 flow. Second operand 10 states and 610 transitions. [2021-10-13 22:45:40,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 89 transitions, 256 flow [2021-10-13 22:45:40,222 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 22:45:40,225 INFO L242 Difference]: Finished difference. Result has 81 places, 63 transitions, 179 flow [2021-10-13 22:45:40,227 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 22:45:40,227 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 13 predicate places. [2021-10-13 22:45:40,227 INFO L470 AbstractCegarLoop]: Abstraction has has 81 places, 63 transitions, 179 flow [2021-10-13 22:45:40,228 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 22:45:40,228 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:40,228 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 22:45:40,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 22:45:40,229 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:40,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:40,230 INFO L82 PathProgramCache]: Analyzing trace with hash 42342464, now seen corresponding path program 1 times [2021-10-13 22:45:40,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:40,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490913184] [2021-10-13 22:45:40,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:40,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:40,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:40,367 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 22:45:40,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:40,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490913184] [2021-10-13 22:45:40,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490913184] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 22:45:40,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 22:45:40,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-13 22:45:40,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844468743] [2021-10-13 22:45:40,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 22:45:40,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:40,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 22:45:40,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-13 22:45:40,376 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:40,377 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 22:45:40,377 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:40,377 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:40,377 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:40,486 INFO L129 PetriNetUnfolder]: 36/172 cut-off events. [2021-10-13 22:45:40,487 INFO L130 PetriNetUnfolder]: For 93/107 co-relation queries the response was YES. [2021-10-13 22:45:40,488 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 22:45:40,488 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 12 selfloop transitions, 17 changer transitions 8/83 dead transitions. [2021-10-13 22:45:40,488 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 83 transitions, 346 flow [2021-10-13 22:45:40,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 22:45:40,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-13 22:45:40,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 641 transitions. [2021-10-13 22:45:40,494 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.856951871657754 [2021-10-13 22:45:40,494 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 641 transitions. [2021-10-13 22:45:40,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 641 transitions. [2021-10-13 22:45:40,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:40,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 641 transitions. [2021-10-13 22:45:40,497 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 22:45:40,498 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 22:45:40,498 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 22:45:40,498 INFO L186 Difference]: Start difference. First operand has 81 places, 63 transitions, 179 flow. Second operand 11 states and 641 transitions. [2021-10-13 22:45:40,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 83 transitions, 346 flow [2021-10-13 22:45:40,501 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 22:45:40,503 INFO L242 Difference]: Finished difference. Result has 81 places, 71 transitions, 274 flow [2021-10-13 22:45:40,503 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 22:45:40,503 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 13 predicate places. [2021-10-13 22:45:40,504 INFO L470 AbstractCegarLoop]: Abstraction has has 81 places, 71 transitions, 274 flow [2021-10-13 22:45:40,504 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 22:45:40,504 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:40,505 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 22:45:40,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 22:45:40,505 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:40,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:40,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1321610138, now seen corresponding path program 1 times [2021-10-13 22:45:40,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:40,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804497238] [2021-10-13 22:45:40,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:40,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:40,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:40,593 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 22:45:40,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:40,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804497238] [2021-10-13 22:45:40,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804497238] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 22:45:40,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 22:45:40,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-13 22:45:40,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472826900] [2021-10-13 22:45:40,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 22:45:40,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:40,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 22:45:40,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 22:45:40,596 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:40,596 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 22:45:40,596 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:40,596 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:40,597 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:40,679 INFO L129 PetriNetUnfolder]: 39/192 cut-off events. [2021-10-13 22:45:40,679 INFO L130 PetriNetUnfolder]: For 248/271 co-relation queries the response was YES. [2021-10-13 22:45:40,681 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 22:45:40,682 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 19 selfloop transitions, 13 changer transitions 10/88 dead transitions. [2021-10-13 22:45:40,682 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 88 transitions, 480 flow [2021-10-13 22:45:40,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 22:45:40,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-13 22:45:40,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 641 transitions. [2021-10-13 22:45:40,684 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.856951871657754 [2021-10-13 22:45:40,685 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 641 transitions. [2021-10-13 22:45:40,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 641 transitions. [2021-10-13 22:45:40,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:40,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 641 transitions. [2021-10-13 22:45:40,687 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 22:45:40,691 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 22:45:40,692 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 22:45:40,692 INFO L186 Difference]: Start difference. First operand has 81 places, 71 transitions, 274 flow. Second operand 11 states and 641 transitions. [2021-10-13 22:45:40,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 88 transitions, 480 flow [2021-10-13 22:45:40,698 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 22:45:40,699 INFO L242 Difference]: Finished difference. Result has 89 places, 74 transitions, 321 flow [2021-10-13 22:45:40,700 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 22:45:40,700 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 21 predicate places. [2021-10-13 22:45:40,700 INFO L470 AbstractCegarLoop]: Abstraction has has 89 places, 74 transitions, 321 flow [2021-10-13 22:45:40,700 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 22:45:40,700 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:40,700 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 22:45:40,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 22:45:40,701 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:40,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:40,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1681354572, now seen corresponding path program 2 times [2021-10-13 22:45:40,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:40,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299843703] [2021-10-13 22:45:40,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:40,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:40,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:40,788 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 22:45:40,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:40,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299843703] [2021-10-13 22:45:40,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299843703] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 22:45:40,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 22:45:40,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-13 22:45:40,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080333467] [2021-10-13 22:45:40,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 22:45:40,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:40,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 22:45:40,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-13 22:45:40,790 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:40,791 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 22:45:40,791 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:40,791 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:40,791 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:40,880 INFO L129 PetriNetUnfolder]: 43/220 cut-off events. [2021-10-13 22:45:40,880 INFO L130 PetriNetUnfolder]: For 464/497 co-relation queries the response was YES. [2021-10-13 22:45:40,881 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 22:45:40,882 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 19 selfloop transitions, 19 changer transitions 10/94 dead transitions. [2021-10-13 22:45:40,882 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 94 transitions, 603 flow [2021-10-13 22:45:40,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 22:45:40,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-13 22:45:40,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 699 transitions. [2021-10-13 22:45:40,885 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8566176470588235 [2021-10-13 22:45:40,885 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 699 transitions. [2021-10-13 22:45:40,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 699 transitions. [2021-10-13 22:45:40,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:40,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 699 transitions. [2021-10-13 22:45:40,886 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 22:45:40,888 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 22:45:40,888 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 22:45:40,888 INFO L186 Difference]: Start difference. First operand has 89 places, 74 transitions, 321 flow. Second operand 12 states and 699 transitions. [2021-10-13 22:45:40,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 94 transitions, 603 flow [2021-10-13 22:45:40,891 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 22:45:40,892 INFO L242 Difference]: Finished difference. Result has 97 places, 80 transitions, 416 flow [2021-10-13 22:45:40,892 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 22:45:40,892 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 29 predicate places. [2021-10-13 22:45:40,892 INFO L470 AbstractCegarLoop]: Abstraction has has 97 places, 80 transitions, 416 flow [2021-10-13 22:45:40,893 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 22:45:40,893 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:40,893 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 22:45:40,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 22:45:40,893 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:40,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:40,893 INFO L82 PathProgramCache]: Analyzing trace with hash -2120605669, now seen corresponding path program 1 times [2021-10-13 22:45:40,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:40,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98490581] [2021-10-13 22:45:40,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:40,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:40,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:40,971 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 22:45:40,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:40,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98490581] [2021-10-13 22:45:40,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98490581] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:40,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54258596] [2021-10-13 22:45:40,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:40,972 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:40,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:45:40,973 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 22:45:40,974 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 22:45:41,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:41,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 22:45:41,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:45:41,404 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 22:45:41,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54258596] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:41,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:45:41,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-13 22:45:41,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970843634] [2021-10-13 22:45:41,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 22:45:41,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:41,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 22:45:41,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-10-13 22:45:41,408 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:41,409 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 22:45:41,409 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:41,409 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:41,409 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:41,555 INFO L129 PetriNetUnfolder]: 55/297 cut-off events. [2021-10-13 22:45:41,556 INFO L130 PetriNetUnfolder]: For 920/958 co-relation queries the response was YES. [2021-10-13 22:45:41,557 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 22:45:41,558 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 18 selfloop transitions, 37 changer transitions 11/112 dead transitions. [2021-10-13 22:45:41,558 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 112 transitions, 918 flow [2021-10-13 22:45:41,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 22:45:41,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-13 22:45:41,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 930 transitions. [2021-10-13 22:45:41,561 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8547794117647058 [2021-10-13 22:45:41,561 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 930 transitions. [2021-10-13 22:45:41,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 930 transitions. [2021-10-13 22:45:41,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:41,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 930 transitions. [2021-10-13 22:45:41,563 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 22:45:41,564 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 22:45:41,566 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 22:45:41,566 INFO L186 Difference]: Start difference. First operand has 97 places, 80 transitions, 416 flow. Second operand 16 states and 930 transitions. [2021-10-13 22:45:41,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 112 transitions, 918 flow [2021-10-13 22:45:41,570 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 22:45:41,571 INFO L242 Difference]: Finished difference. Result has 109 places, 98 transitions, 654 flow [2021-10-13 22:45:41,572 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 22:45:41,572 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 41 predicate places. [2021-10-13 22:45:41,572 INFO L470 AbstractCegarLoop]: Abstraction has has 109 places, 98 transitions, 654 flow [2021-10-13 22:45:41,572 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 22:45:41,572 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:41,573 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 22:45:41,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 22:45:41,787 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 22:45:41,787 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:41,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:41,788 INFO L82 PathProgramCache]: Analyzing trace with hash -315823260, now seen corresponding path program 1 times [2021-10-13 22:45:41,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:41,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615596197] [2021-10-13 22:45:41,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:41,788 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:41,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:41,879 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 22:45:41,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:41,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615596197] [2021-10-13 22:45:41,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615596197] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 22:45:41,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 22:45:41,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-13 22:45:41,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705768718] [2021-10-13 22:45:41,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 22:45:41,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:41,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 22:45:41,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-13 22:45:41,882 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:41,882 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 22:45:41,882 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:41,882 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:41,883 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:41,961 INFO L129 PetriNetUnfolder]: 52/286 cut-off events. [2021-10-13 22:45:41,962 INFO L130 PetriNetUnfolder]: For 924/953 co-relation queries the response was YES. [2021-10-13 22:45:41,963 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 22:45:41,964 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 33 selfloop transitions, 27 changer transitions 5/111 dead transitions. [2021-10-13 22:45:41,964 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 111 transitions, 964 flow [2021-10-13 22:45:41,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 22:45:41,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-13 22:45:41,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 639 transitions. [2021-10-13 22:45:41,966 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8542780748663101 [2021-10-13 22:45:41,966 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 639 transitions. [2021-10-13 22:45:41,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 639 transitions. [2021-10-13 22:45:41,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:41,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 639 transitions. [2021-10-13 22:45:41,968 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 22:45:41,969 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 22:45:41,969 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 22:45:41,969 INFO L186 Difference]: Start difference. First operand has 109 places, 98 transitions, 654 flow. Second operand 11 states and 639 transitions. [2021-10-13 22:45:41,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 111 transitions, 964 flow [2021-10-13 22:45:41,973 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 22:45:41,976 INFO L242 Difference]: Finished difference. Result has 109 places, 99 transitions, 636 flow [2021-10-13 22:45:41,977 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 22:45:41,977 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 41 predicate places. [2021-10-13 22:45:41,977 INFO L470 AbstractCegarLoop]: Abstraction has has 109 places, 99 transitions, 636 flow [2021-10-13 22:45:41,977 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 22:45:41,977 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:41,977 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 22:45:41,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-13 22:45:41,978 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:41,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:41,978 INFO L82 PathProgramCache]: Analyzing trace with hash 531491406, now seen corresponding path program 2 times [2021-10-13 22:45:41,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:41,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949513889] [2021-10-13 22:45:41,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:41,983 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:41,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:42,090 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 22:45:42,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:42,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949513889] [2021-10-13 22:45:42,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949513889] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 22:45:42,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 22:45:42,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-13 22:45:42,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781701218] [2021-10-13 22:45:42,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 22:45:42,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:42,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 22:45:42,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-13 22:45:42,092 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:42,093 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 22:45:42,093 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:42,093 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:42,093 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:42,206 INFO L129 PetriNetUnfolder]: 61/330 cut-off events. [2021-10-13 22:45:42,206 INFO L130 PetriNetUnfolder]: For 1113/1147 co-relation queries the response was YES. [2021-10-13 22:45:42,207 INFO L84 FinitePrefix]: Finished finitePrefix Result has 996 conditions, 330 events. 61/330 cut-off events. For 1113/1147 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1618 event pairs, 0 based on Foata normal form. 21/320 useless extension candidates. Maximal degree in co-relation 939. Up to 67 conditions per place. [2021-10-13 22:45:42,209 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 22 selfloop transitions, 46 changer transitions 8/122 dead transitions. [2021-10-13 22:45:42,209 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 122 transitions, 1109 flow [2021-10-13 22:45:42,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 22:45:42,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-13 22:45:42,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 871 transitions. [2021-10-13 22:45:42,211 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8539215686274509 [2021-10-13 22:45:42,211 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 871 transitions. [2021-10-13 22:45:42,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 871 transitions. [2021-10-13 22:45:42,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:42,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 871 transitions. [2021-10-13 22:45:42,213 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 22:45:42,214 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 22:45:42,215 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 22:45:42,215 INFO L186 Difference]: Start difference. First operand has 109 places, 99 transitions, 636 flow. Second operand 15 states and 871 transitions. [2021-10-13 22:45:42,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 122 transitions, 1109 flow [2021-10-13 22:45:42,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 122 transitions, 1025 flow, removed 17 selfloop flow, removed 10 redundant places. [2021-10-13 22:45:42,221 INFO L242 Difference]: Finished difference. Result has 117 places, 108 transitions, 842 flow [2021-10-13 22:45:42,221 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=842, PETRI_PLACES=117, PETRI_TRANSITIONS=108} [2021-10-13 22:45:42,221 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 49 predicate places. [2021-10-13 22:45:42,221 INFO L470 AbstractCegarLoop]: Abstraction has has 117 places, 108 transitions, 842 flow [2021-10-13 22:45:42,222 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 22:45:42,222 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:42,222 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 22:45:42,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-13 22:45:42,222 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:42,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:42,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1825150234, now seen corresponding path program 3 times [2021-10-13 22:45:42,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:42,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322133921] [2021-10-13 22:45:42,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:42,223 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:42,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:42,280 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 22:45:42,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:42,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322133921] [2021-10-13 22:45:42,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322133921] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 22:45:42,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 22:45:42,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-13 22:45:42,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431647582] [2021-10-13 22:45:42,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 22:45:42,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:42,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 22:45:42,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 22:45:42,282 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:42,282 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 108 transitions, 842 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 22:45:42,282 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:42,282 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:42,282 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:42,420 INFO L129 PetriNetUnfolder]: 73/414 cut-off events. [2021-10-13 22:45:42,421 INFO L130 PetriNetUnfolder]: For 1912/1953 co-relation queries the response was YES. [2021-10-13 22:45:42,422 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1327 conditions, 414 events. 73/414 cut-off events. For 1912/1953 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2322 event pairs, 0 based on Foata normal form. 23/396 useless extension candidates. Maximal degree in co-relation 1267. Up to 81 conditions per place. [2021-10-13 22:45:42,424 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 39 selfloop transitions, 43 changer transitions 13/141 dead transitions. [2021-10-13 22:45:42,424 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 141 transitions, 1510 flow [2021-10-13 22:45:42,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 22:45:42,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-13 22:45:42,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 988 transitions. [2021-10-13 22:45:42,426 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8546712802768166 [2021-10-13 22:45:42,426 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 988 transitions. [2021-10-13 22:45:42,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 988 transitions. [2021-10-13 22:45:42,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:42,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 988 transitions. [2021-10-13 22:45:42,429 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 22:45:42,430 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 22:45:42,431 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 22:45:42,431 INFO L186 Difference]: Start difference. First operand has 117 places, 108 transitions, 842 flow. Second operand 17 states and 988 transitions. [2021-10-13 22:45:42,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 141 transitions, 1510 flow [2021-10-13 22:45:42,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 141 transitions, 1384 flow, removed 40 selfloop flow, removed 11 redundant places. [2021-10-13 22:45:42,458 INFO L242 Difference]: Finished difference. Result has 129 places, 121 transitions, 1076 flow [2021-10-13 22:45:42,458 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=753, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1076, PETRI_PLACES=129, PETRI_TRANSITIONS=121} [2021-10-13 22:45:42,458 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 61 predicate places. [2021-10-13 22:45:42,458 INFO L470 AbstractCegarLoop]: Abstraction has has 129 places, 121 transitions, 1076 flow [2021-10-13 22:45:42,459 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 22:45:42,459 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:42,459 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 22:45:42,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-13 22:45:42,459 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:42,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:42,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1041805789, now seen corresponding path program 1 times [2021-10-13 22:45:42,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:42,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419015541] [2021-10-13 22:45:42,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:42,460 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:42,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:42,547 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 22:45:42,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:42,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419015541] [2021-10-13 22:45:42,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419015541] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:42,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716896681] [2021-10-13 22:45:42,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:42,548 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:42,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:45:42,549 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 22:45:42,550 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 22:45:42,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:42,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 22:45:42,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:45:42,931 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 22:45:42,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716896681] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:42,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:45:42,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-10-13 22:45:42,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535423390] [2021-10-13 22:45:42,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 22:45:42,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:42,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 22:45:42,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-10-13 22:45:42,934 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:42,935 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 121 transitions, 1076 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 22:45:42,935 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:42,935 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:42,935 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:43,048 INFO L129 PetriNetUnfolder]: 71/419 cut-off events. [2021-10-13 22:45:43,048 INFO L130 PetriNetUnfolder]: For 2405/2455 co-relation queries the response was YES. [2021-10-13 22:45:43,050 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1428 conditions, 419 events. 71/419 cut-off events. For 2405/2455 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2397 event pairs, 0 based on Foata normal form. 21/398 useless extension candidates. Maximal degree in co-relation 1361. Up to 80 conditions per place. [2021-10-13 22:45:43,053 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 52 selfloop transitions, 37 changer transitions 5/140 dead transitions. [2021-10-13 22:45:43,053 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 140 transitions, 1593 flow [2021-10-13 22:45:43,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 22:45:43,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-13 22:45:43,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 810 transitions. [2021-10-13 22:45:43,055 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8508403361344538 [2021-10-13 22:45:43,055 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 810 transitions. [2021-10-13 22:45:43,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 810 transitions. [2021-10-13 22:45:43,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:43,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 810 transitions. [2021-10-13 22:45:43,057 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 22:45:43,058 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 22:45:43,058 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 22:45:43,058 INFO L186 Difference]: Start difference. First operand has 129 places, 121 transitions, 1076 flow. Second operand 14 states and 810 transitions. [2021-10-13 22:45:43,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 140 transitions, 1593 flow [2021-10-13 22:45:43,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 140 transitions, 1459 flow, removed 54 selfloop flow, removed 10 redundant places. [2021-10-13 22:45:43,067 INFO L242 Difference]: Finished difference. Result has 133 places, 126 transitions, 1156 flow [2021-10-13 22:45:43,067 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=977, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1156, PETRI_PLACES=133, PETRI_TRANSITIONS=126} [2021-10-13 22:45:43,067 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 65 predicate places. [2021-10-13 22:45:43,067 INFO L470 AbstractCegarLoop]: Abstraction has has 133 places, 126 transitions, 1156 flow [2021-10-13 22:45:43,068 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 22:45:43,068 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:43,068 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 22:45:43,084 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 22:45:43,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-13 22:45:43,284 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:43,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:43,285 INFO L82 PathProgramCache]: Analyzing trace with hash -403660899, now seen corresponding path program 2 times [2021-10-13 22:45:43,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:43,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927827266] [2021-10-13 22:45:43,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:43,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:43,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:43,371 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 22:45:43,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:43,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927827266] [2021-10-13 22:45:43,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927827266] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:43,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752252197] [2021-10-13 22:45:43,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:45:43,373 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:43,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:45:43,374 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 22:45:43,375 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 22:45:43,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:45:43,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:45:43,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 22:45:43,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:45:43,685 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 22:45:43,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752252197] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:43,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:45:43,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-10-13 22:45:43,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594394657] [2021-10-13 22:45:43,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 22:45:43,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:43,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 22:45:43,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-13 22:45:43,687 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:43,687 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 126 transitions, 1156 flow. Second operand has 12 states, 12 states have (on average 56.25) internal successors, (675), 12 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:43,687 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:43,688 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:43,688 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:43,809 INFO L129 PetriNetUnfolder]: 72/421 cut-off events. [2021-10-13 22:45:43,809 INFO L130 PetriNetUnfolder]: For 2389/2437 co-relation queries the response was YES. [2021-10-13 22:45:43,811 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1455 conditions, 421 events. 72/421 cut-off events. For 2389/2437 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2420 event pairs, 0 based on Foata normal form. 21/400 useless extension candidates. Maximal degree in co-relation 1386. Up to 80 conditions per place. [2021-10-13 22:45:43,812 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 45 selfloop transitions, 45 changer transitions 5/141 dead transitions. [2021-10-13 22:45:43,812 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 141 transitions, 1616 flow [2021-10-13 22:45:43,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 22:45:43,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-13 22:45:43,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 868 transitions. [2021-10-13 22:45:43,814 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8509803921568627 [2021-10-13 22:45:43,814 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 868 transitions. [2021-10-13 22:45:43,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 868 transitions. [2021-10-13 22:45:43,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:43,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 868 transitions. [2021-10-13 22:45:43,815 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 22:45:43,817 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 22:45:43,817 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 22:45:43,817 INFO L186 Difference]: Start difference. First operand has 133 places, 126 transitions, 1156 flow. Second operand 15 states and 868 transitions. [2021-10-13 22:45:43,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 141 transitions, 1616 flow [2021-10-13 22:45:43,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 141 transitions, 1512 flow, removed 28 selfloop flow, removed 9 redundant places. [2021-10-13 22:45:43,825 INFO L242 Difference]: Finished difference. Result has 139 places, 127 transitions, 1225 flow [2021-10-13 22:45:43,826 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=1084, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1225, PETRI_PLACES=139, PETRI_TRANSITIONS=127} [2021-10-13 22:45:43,826 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 71 predicate places. [2021-10-13 22:45:43,826 INFO L470 AbstractCegarLoop]: Abstraction has has 139 places, 127 transitions, 1225 flow [2021-10-13 22:45:43,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 56.25) internal successors, (675), 12 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:43,826 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:43,826 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 22:45:43,845 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 22:45:44,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:44,040 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:44,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:44,040 INFO L82 PathProgramCache]: Analyzing trace with hash -124444669, now seen corresponding path program 3 times [2021-10-13 22:45:44,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:44,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408302123] [2021-10-13 22:45:44,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:44,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:44,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:44,125 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 22:45:44,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:44,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408302123] [2021-10-13 22:45:44,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408302123] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:44,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986706912] [2021-10-13 22:45:44,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:45:44,125 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:44,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:45:44,126 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 22:45:44,128 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 22:45:44,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 22:45:44,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:45:44,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 22:45:44,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:45:44,500 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 22:45:44,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986706912] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:44,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:45:44,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-10-13 22:45:44,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394824235] [2021-10-13 22:45:44,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 22:45:44,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:44,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 22:45:44,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-10-13 22:45:44,502 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:44,503 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 127 transitions, 1225 flow. Second operand has 13 states, 13 states have (on average 56.23076923076923) internal successors, (731), 13 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:44,503 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:44,503 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:44,503 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:44,823 INFO L129 PetriNetUnfolder]: 103/595 cut-off events. [2021-10-13 22:45:44,824 INFO L130 PetriNetUnfolder]: For 4085/4150 co-relation queries the response was YES. [2021-10-13 22:45:44,826 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2144 conditions, 595 events. 103/595 cut-off events. For 4085/4150 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3853 event pairs, 0 based on Foata normal form. 36/573 useless extension candidates. Maximal degree in co-relation 2074. Up to 124 conditions per place. [2021-10-13 22:45:44,829 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 15 selfloop transitions, 101 changer transitions 22/184 dead transitions. [2021-10-13 22:45:44,829 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 184 transitions, 2562 flow [2021-10-13 22:45:44,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 22:45:44,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-10-13 22:45:44,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1681 transitions. [2021-10-13 22:45:44,831 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8524340770791075 [2021-10-13 22:45:44,831 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1681 transitions. [2021-10-13 22:45:44,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1681 transitions. [2021-10-13 22:45:44,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:44,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1681 transitions. [2021-10-13 22:45:44,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 57.96551724137931) internal successors, (1681), 29 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:44,836 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 22:45:44,836 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 22:45:44,836 INFO L186 Difference]: Start difference. First operand has 139 places, 127 transitions, 1225 flow. Second operand 29 states and 1681 transitions. [2021-10-13 22:45:44,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 184 transitions, 2562 flow [2021-10-13 22:45:44,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 184 transitions, 2382 flow, removed 45 selfloop flow, removed 14 redundant places. [2021-10-13 22:45:44,848 INFO L242 Difference]: Finished difference. Result has 167 places, 158 transitions, 1985 flow [2021-10-13 22:45:44,848 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=1136, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1985, PETRI_PLACES=167, PETRI_TRANSITIONS=158} [2021-10-13 22:45:44,848 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 99 predicate places. [2021-10-13 22:45:44,848 INFO L470 AbstractCegarLoop]: Abstraction has has 167 places, 158 transitions, 1985 flow [2021-10-13 22:45:44,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.23076923076923) internal successors, (731), 13 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:44,849 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:44,849 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 22:45:44,867 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 22:45:45,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:45,063 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:45,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:45,064 INFO L82 PathProgramCache]: Analyzing trace with hash -372495063, now seen corresponding path program 4 times [2021-10-13 22:45:45,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:45,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772933327] [2021-10-13 22:45:45,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:45,064 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:45,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:45,128 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 22:45:45,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:45,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772933327] [2021-10-13 22:45:45,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772933327] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:45,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375138509] [2021-10-13 22:45:45,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:45:45,128 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:45,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:45:45,129 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 22:45:45,130 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 22:45:45,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:45:45,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:45:45,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 22:45:45,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:45:45,569 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 22:45:45,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375138509] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:45,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:45:45,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-10-13 22:45:45,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376722061] [2021-10-13 22:45:45,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 22:45:45,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:45,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 22:45:45,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-10-13 22:45:45,572 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:45,573 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 158 transitions, 1985 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 22:45:45,573 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:45,573 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:45,573 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:45,934 INFO L129 PetriNetUnfolder]: 124/774 cut-off events. [2021-10-13 22:45:45,934 INFO L130 PetriNetUnfolder]: For 6775/6850 co-relation queries the response was YES. [2021-10-13 22:45:45,939 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2930 conditions, 774 events. 124/774 cut-off events. For 6775/6850 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 5644 event pairs, 0 based on Foata normal form. 38/733 useless extension candidates. Maximal degree in co-relation 2847. Up to 158 conditions per place. [2021-10-13 22:45:45,942 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 27 selfloop transitions, 128 changer transitions 22/223 dead transitions. [2021-10-13 22:45:45,943 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 223 transitions, 3696 flow [2021-10-13 22:45:45,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 22:45:45,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-13 22:45:45,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1624 transitions. [2021-10-13 22:45:45,944 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8529411764705882 [2021-10-13 22:45:45,944 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1624 transitions. [2021-10-13 22:45:45,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1624 transitions. [2021-10-13 22:45:45,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:45,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1624 transitions. [2021-10-13 22:45:45,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 58.0) internal successors, (1624), 28 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:45,950 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 22:45:45,950 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 22:45:45,950 INFO L186 Difference]: Start difference. First operand has 167 places, 158 transitions, 1985 flow. Second operand 28 states and 1624 transitions. [2021-10-13 22:45:45,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 223 transitions, 3696 flow [2021-10-13 22:45:45,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 223 transitions, 3006 flow, removed 319 selfloop flow, removed 19 redundant places. [2021-10-13 22:45:45,970 INFO L242 Difference]: Finished difference. Result has 181 places, 195 transitions, 2564 flow [2021-10-13 22:45:45,970 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=1641, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2564, PETRI_PLACES=181, PETRI_TRANSITIONS=195} [2021-10-13 22:45:45,971 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 113 predicate places. [2021-10-13 22:45:45,971 INFO L470 AbstractCegarLoop]: Abstraction has has 181 places, 195 transitions, 2564 flow [2021-10-13 22:45:45,971 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 22:45:45,971 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:45,971 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 22:45:45,999 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 22:45:46,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-13 22:45:46,179 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:46,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:46,180 INFO L82 PathProgramCache]: Analyzing trace with hash 587823547, now seen corresponding path program 2 times [2021-10-13 22:45:46,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:46,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726182265] [2021-10-13 22:45:46,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:46,180 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:46,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:46,262 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 22:45:46,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:46,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726182265] [2021-10-13 22:45:46,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726182265] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:46,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504425554] [2021-10-13 22:45:46,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:45:46,263 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:46,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:45:46,263 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 22:45:46,264 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 22:45:46,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:45:46,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:45:46,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 22:45:46,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:45:46,750 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 22:45:46,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504425554] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:46,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:45:46,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-10-13 22:45:46,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31729339] [2021-10-13 22:45:46,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 22:45:46,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:46,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 22:45:46,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-10-13 22:45:46,752 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:46,753 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 195 transitions, 2564 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 22:45:46,753 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:46,753 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:46,753 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:47,011 INFO L129 PetriNetUnfolder]: 132/854 cut-off events. [2021-10-13 22:45:47,011 INFO L130 PetriNetUnfolder]: For 5614/5676 co-relation queries the response was YES. [2021-10-13 22:45:47,015 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2995 conditions, 854 events. 132/854 cut-off events. For 5614/5676 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 6215 event pairs, 0 based on Foata normal form. 20/786 useless extension candidates. Maximal degree in co-relation 2906. Up to 167 conditions per place. [2021-10-13 22:45:47,018 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 104 selfloop transitions, 71 changer transitions 11/232 dead transitions. [2021-10-13 22:45:47,018 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 232 transitions, 3688 flow [2021-10-13 22:45:47,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 22:45:47,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-13 22:45:47,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1160 transitions. [2021-10-13 22:45:47,019 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8529411764705882 [2021-10-13 22:45:47,019 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1160 transitions. [2021-10-13 22:45:47,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1160 transitions. [2021-10-13 22:45:47,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:47,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1160 transitions. [2021-10-13 22:45:47,021 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 22:45:47,023 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 22:45:47,023 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 22:45:47,023 INFO L186 Difference]: Start difference. First operand has 181 places, 195 transitions, 2564 flow. Second operand 20 states and 1160 transitions. [2021-10-13 22:45:47,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 232 transitions, 3688 flow [2021-10-13 22:45:47,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 232 transitions, 3278 flow, removed 161 selfloop flow, removed 21 redundant places. [2021-10-13 22:45:47,042 INFO L242 Difference]: Finished difference. Result has 178 places, 219 transitions, 2786 flow [2021-10-13 22:45:47,042 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=2220, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2786, PETRI_PLACES=178, PETRI_TRANSITIONS=219} [2021-10-13 22:45:47,042 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 110 predicate places. [2021-10-13 22:45:47,042 INFO L470 AbstractCegarLoop]: Abstraction has has 178 places, 219 transitions, 2786 flow [2021-10-13 22:45:47,043 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 22:45:47,043 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:47,043 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 22:45:47,059 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 22:45:47,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:47,259 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:47,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:47,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1048523948, now seen corresponding path program 5 times [2021-10-13 22:45:47,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:47,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091355724] [2021-10-13 22:45:47,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:47,260 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:47,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:47,347 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 22:45:47,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:47,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091355724] [2021-10-13 22:45:47,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091355724] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:47,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980778699] [2021-10-13 22:45:47,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:45:47,347 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:47,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:45:47,363 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 22:45:47,364 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 22:45:47,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 22:45:47,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:45:47,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 22:45:47,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:45:47,885 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 22:45:47,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980778699] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:47,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:45:47,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-10-13 22:45:47,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395681035] [2021-10-13 22:45:47,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 22:45:47,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:47,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 22:45:47,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-10-13 22:45:47,886 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:47,887 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 219 transitions, 2786 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 22:45:47,887 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:47,887 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:47,887 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:48,043 INFO L129 PetriNetUnfolder]: 129/850 cut-off events. [2021-10-13 22:45:48,043 INFO L130 PetriNetUnfolder]: For 4373/4434 co-relation queries the response was YES. [2021-10-13 22:45:48,048 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2852 conditions, 850 events. 129/850 cut-off events. For 4373/4434 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 6236 event pairs, 0 based on Foata normal form. 18/780 useless extension candidates. Maximal degree in co-relation 2767. Up to 168 conditions per place. [2021-10-13 22:45:48,052 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 136 selfloop transitions, 54 changer transitions 5/241 dead transitions. [2021-10-13 22:45:48,053 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 241 transitions, 3561 flow [2021-10-13 22:45:48,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 22:45:48,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-13 22:45:48,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 867 transitions. [2021-10-13 22:45:48,054 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.85 [2021-10-13 22:45:48,054 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 867 transitions. [2021-10-13 22:45:48,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 867 transitions. [2021-10-13 22:45:48,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:48,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 867 transitions. [2021-10-13 22:45:48,056 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 22:45:48,057 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 22:45:48,057 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 22:45:48,057 INFO L186 Difference]: Start difference. First operand has 178 places, 219 transitions, 2786 flow. Second operand 15 states and 867 transitions. [2021-10-13 22:45:48,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 241 transitions, 3561 flow [2021-10-13 22:45:48,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 241 transitions, 3406 flow, removed 53 selfloop flow, removed 12 redundant places. [2021-10-13 22:45:48,076 INFO L242 Difference]: Finished difference. Result has 180 places, 221 transitions, 2826 flow [2021-10-13 22:45:48,076 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=2639, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2826, PETRI_PLACES=180, PETRI_TRANSITIONS=221} [2021-10-13 22:45:48,077 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 112 predicate places. [2021-10-13 22:45:48,077 INFO L470 AbstractCegarLoop]: Abstraction has has 180 places, 221 transitions, 2826 flow [2021-10-13 22:45:48,077 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 22:45:48,077 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:48,077 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 22:45:48,096 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 22:45:48,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:48,291 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:48,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:48,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1687103566, now seen corresponding path program 6 times [2021-10-13 22:45:48,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:48,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694316528] [2021-10-13 22:45:48,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:48,292 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:48,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:48,375 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 22:45:48,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:48,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694316528] [2021-10-13 22:45:48,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694316528] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:48,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864022265] [2021-10-13 22:45:48,376 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:45:48,376 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:48,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:45:48,392 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 22:45:48,393 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 22:45:48,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 22:45:48,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:45:48,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:45:48,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:45:48,898 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 22:45:48,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864022265] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:48,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:45:48,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-10-13 22:45:48,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503673092] [2021-10-13 22:45:48,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 22:45:48,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:48,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 22:45:48,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-10-13 22:45:48,900 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:48,900 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 221 transitions, 2826 flow. Second operand has 13 states, 13 states have (on average 56.23076923076923) internal successors, (731), 13 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:48,900 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:48,900 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:48,900 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:49,055 INFO L129 PetriNetUnfolder]: 130/852 cut-off events. [2021-10-13 22:45:49,055 INFO L130 PetriNetUnfolder]: For 4849/4918 co-relation queries the response was YES. [2021-10-13 22:45:49,059 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2912 conditions, 852 events. 130/852 cut-off events. For 4849/4918 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 6254 event pairs, 0 based on Foata normal form. 18/782 useless extension candidates. Maximal degree in co-relation 2826. Up to 157 conditions per place. [2021-10-13 22:45:49,063 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 123 selfloop transitions, 68 changer transitions 5/242 dead transitions. [2021-10-13 22:45:49,063 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 242 transitions, 3596 flow [2021-10-13 22:45:49,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 22:45:49,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-13 22:45:49,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 925 transitions. [2021-10-13 22:45:49,064 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8501838235294118 [2021-10-13 22:45:49,064 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 925 transitions. [2021-10-13 22:45:49,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 925 transitions. [2021-10-13 22:45:49,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:49,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 925 transitions. [2021-10-13 22:45:49,066 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 22:45:49,067 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 22:45:49,067 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 22:45:49,067 INFO L186 Difference]: Start difference. First operand has 180 places, 221 transitions, 2826 flow. Second operand 16 states and 925 transitions. [2021-10-13 22:45:49,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 242 transitions, 3596 flow [2021-10-13 22:45:49,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 242 transitions, 3496 flow, removed 9 selfloop flow, removed 12 redundant places. [2021-10-13 22:45:49,090 INFO L242 Difference]: Finished difference. Result has 184 places, 222 transitions, 2936 flow [2021-10-13 22:45:49,090 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=2736, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2936, PETRI_PLACES=184, PETRI_TRANSITIONS=222} [2021-10-13 22:45:49,090 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 116 predicate places. [2021-10-13 22:45:49,090 INFO L470 AbstractCegarLoop]: Abstraction has has 184 places, 222 transitions, 2936 flow [2021-10-13 22:45:49,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.23076923076923) internal successors, (731), 13 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:49,091 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:49,091 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 22:45:49,107 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 22:45:49,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-13 22:45:49,307 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:49,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:49,308 INFO L82 PathProgramCache]: Analyzing trace with hash 696114334, now seen corresponding path program 7 times [2021-10-13 22:45:49,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:49,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962446245] [2021-10-13 22:45:49,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:49,308 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:49,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:49,374 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 22:45:49,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:49,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962446245] [2021-10-13 22:45:49,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962446245] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:49,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952139326] [2021-10-13 22:45:49,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:45:49,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:49,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:45:49,375 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 22:45:49,376 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 22:45:49,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:49,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 22:45:49,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:45:49,956 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 22:45:49,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952139326] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:49,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:45:49,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-10-13 22:45:49,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423997242] [2021-10-13 22:45:49,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 22:45:49,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:49,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 22:45:49,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-10-13 22:45:49,957 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:49,958 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 222 transitions, 2936 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 22:45:49,958 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:49,958 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:49,959 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:50,374 INFO L129 PetriNetUnfolder]: 157/997 cut-off events. [2021-10-13 22:45:50,375 INFO L130 PetriNetUnfolder]: For 7860/7943 co-relation queries the response was YES. [2021-10-13 22:45:50,379 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3588 conditions, 997 events. 157/997 cut-off events. For 7860/7943 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 7675 event pairs, 0 based on Foata normal form. 38/934 useless extension candidates. Maximal degree in co-relation 3501. Up to 145 conditions per place. [2021-10-13 22:45:50,383 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 44 selfloop transitions, 166 changer transitions 17/273 dead transitions. [2021-10-13 22:45:50,383 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 273 transitions, 4483 flow [2021-10-13 22:45:50,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 22:45:50,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-10-13 22:45:50,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1679 transitions. [2021-10-13 22:45:50,385 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8514198782961461 [2021-10-13 22:45:50,385 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1679 transitions. [2021-10-13 22:45:50,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1679 transitions. [2021-10-13 22:45:50,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:50,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1679 transitions. [2021-10-13 22:45:50,387 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 22:45:50,389 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 22:45:50,389 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 22:45:50,389 INFO L186 Difference]: Start difference. First operand has 184 places, 222 transitions, 2936 flow. Second operand 29 states and 1679 transitions. [2021-10-13 22:45:50,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 273 transitions, 4483 flow [2021-10-13 22:45:50,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 273 transitions, 4304 flow, removed 42 selfloop flow, removed 13 redundant places. [2021-10-13 22:45:50,413 INFO L242 Difference]: Finished difference. Result has 209 places, 250 transitions, 3794 flow [2021-10-13 22:45:50,413 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=2833, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3794, PETRI_PLACES=209, PETRI_TRANSITIONS=250} [2021-10-13 22:45:50,413 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 141 predicate places. [2021-10-13 22:45:50,414 INFO L470 AbstractCegarLoop]: Abstraction has has 209 places, 250 transitions, 3794 flow [2021-10-13 22:45:50,414 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 22:45:50,414 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:50,414 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 22:45:50,430 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 22:45:50,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-13 22:45:50,627 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:50,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:50,628 INFO L82 PathProgramCache]: Analyzing trace with hash -693170104, now seen corresponding path program 8 times [2021-10-13 22:45:50,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:50,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794251728] [2021-10-13 22:45:50,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:50,628 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:50,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:50,703 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 22:45:50,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:50,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794251728] [2021-10-13 22:45:50,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794251728] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:50,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693533427] [2021-10-13 22:45:50,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:45:50,704 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:50,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:45:50,705 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 22:45:50,706 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 22:45:50,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:45:50,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:45:50,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 22:45:50,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:45:51,244 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 22:45:51,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693533427] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:51,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:45:51,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-10-13 22:45:51,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654816694] [2021-10-13 22:45:51,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 22:45:51,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:51,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 22:45:51,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-10-13 22:45:51,246 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:51,246 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 250 transitions, 3794 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 22:45:51,247 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:51,247 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:51,247 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:51,867 INFO L129 PetriNetUnfolder]: 201/1309 cut-off events. [2021-10-13 22:45:51,867 INFO L130 PetriNetUnfolder]: For 11526/11630 co-relation queries the response was YES. [2021-10-13 22:45:51,873 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4863 conditions, 1309 events. 201/1309 cut-off events. For 11526/11630 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 11098 event pairs, 0 based on Foata normal form. 42/1217 useless extension candidates. Maximal degree in co-relation 4766. Up to 197 conditions per place. [2021-10-13 22:45:51,879 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 49 selfloop transitions, 228 changer transitions 22/345 dead transitions. [2021-10-13 22:45:51,879 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 345 transitions, 6237 flow [2021-10-13 22:45:51,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-13 22:45:51,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-10-13 22:45:51,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2314 transitions. [2021-10-13 22:45:51,883 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.850735294117647 [2021-10-13 22:45:51,883 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2314 transitions. [2021-10-13 22:45:51,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2314 transitions. [2021-10-13 22:45:51,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:51,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2314 transitions. [2021-10-13 22:45:51,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 57.85) internal successors, (2314), 40 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:51,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 68.0) internal successors, (2788), 41 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:51,895 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 68.0) internal successors, (2788), 41 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:51,895 INFO L186 Difference]: Start difference. First operand has 209 places, 250 transitions, 3794 flow. Second operand 40 states and 2314 transitions. [2021-10-13 22:45:51,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 345 transitions, 6237 flow [2021-10-13 22:45:51,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 345 transitions, 5838 flow, removed 155 selfloop flow, removed 21 redundant places. [2021-10-13 22:45:51,936 INFO L242 Difference]: Finished difference. Result has 237 places, 316 transitions, 5158 flow [2021-10-13 22:45:51,936 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=3483, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=5158, PETRI_PLACES=237, PETRI_TRANSITIONS=316} [2021-10-13 22:45:51,937 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 169 predicate places. [2021-10-13 22:45:51,937 INFO L470 AbstractCegarLoop]: Abstraction has has 237 places, 316 transitions, 5158 flow [2021-10-13 22:45:51,937 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 22:45:51,937 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:51,937 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 22:45:51,956 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 22:45:52,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-13 22:45:52,154 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:52,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:52,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1893147578, now seen corresponding path program 1 times [2021-10-13 22:45:52,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:52,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379334676] [2021-10-13 22:45:52,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:52,155 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:52,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:52,218 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 22:45:52,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:52,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379334676] [2021-10-13 22:45:52,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379334676] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:52,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032489968] [2021-10-13 22:45:52,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:52,218 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:52,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:45:52,219 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 22:45:52,220 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 22:45:52,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:52,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 22:45:52,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:45:52,783 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 22:45:52,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032489968] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:52,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:45:52,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-10-13 22:45:52,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582249113] [2021-10-13 22:45:52,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 22:45:52,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:52,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 22:45:52,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-10-13 22:45:52,785 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:52,785 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 316 transitions, 5158 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 22:45:52,785 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:52,785 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:52,786 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:53,238 INFO L129 PetriNetUnfolder]: 215/1448 cut-off events. [2021-10-13 22:45:53,238 INFO L130 PetriNetUnfolder]: For 12674/12782 co-relation queries the response was YES. [2021-10-13 22:45:53,246 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5477 conditions, 1448 events. 215/1448 cut-off events. For 12674/12782 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 12800 event pairs, 0 based on Foata normal form. 38/1335 useless extension candidates. Maximal degree in co-relation 5370. Up to 224 conditions per place. [2021-10-13 22:45:53,252 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 108 selfloop transitions, 204 changer transitions 11/369 dead transitions. [2021-10-13 22:45:53,252 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 369 transitions, 7003 flow [2021-10-13 22:45:53,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 22:45:53,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-13 22:45:53,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1620 transitions. [2021-10-13 22:45:53,254 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8508403361344538 [2021-10-13 22:45:53,254 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1620 transitions. [2021-10-13 22:45:53,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1620 transitions. [2021-10-13 22:45:53,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:53,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1620 transitions. [2021-10-13 22:45:53,256 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 22:45:53,257 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 22:45:53,258 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 22:45:53,258 INFO L186 Difference]: Start difference. First operand has 237 places, 316 transitions, 5158 flow. Second operand 28 states and 1620 transitions. [2021-10-13 22:45:53,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 369 transitions, 7003 flow [2021-10-13 22:45:53,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 369 transitions, 6422 flow, removed 245 selfloop flow, removed 22 redundant places. [2021-10-13 22:45:53,311 INFO L242 Difference]: Finished difference. Result has 243 places, 352 transitions, 5866 flow [2021-10-13 22:45:53,311 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=4689, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=5866, PETRI_PLACES=243, PETRI_TRANSITIONS=352} [2021-10-13 22:45:53,312 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 175 predicate places. [2021-10-13 22:45:53,312 INFO L470 AbstractCegarLoop]: Abstraction has has 243 places, 352 transitions, 5866 flow [2021-10-13 22:45:53,312 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 22:45:53,312 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:53,312 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 22:45:53,331 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 22:45:53,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-13 22:45:53,525 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:53,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:53,526 INFO L82 PathProgramCache]: Analyzing trace with hash 477927070, now seen corresponding path program 1 times [2021-10-13 22:45:53,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:53,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469660323] [2021-10-13 22:45:53,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:53,526 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:53,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:53,613 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 22:45:53,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:53,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469660323] [2021-10-13 22:45:53,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469660323] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:53,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735928299] [2021-10-13 22:45:53,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:53,614 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:53,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:45:53,615 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 22:45:53,616 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 22:45:53,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:53,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 22:45:53,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:45:54,264 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 22:45:54,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735928299] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:54,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:45:54,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-10-13 22:45:54,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128514729] [2021-10-13 22:45:54,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 22:45:54,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:54,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 22:45:54,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-10-13 22:45:54,265 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:54,266 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 352 transitions, 5866 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 22:45:54,266 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:54,266 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:54,266 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:54,717 INFO L129 PetriNetUnfolder]: 249/1732 cut-off events. [2021-10-13 22:45:54,717 INFO L130 PetriNetUnfolder]: For 15644/15778 co-relation queries the response was YES. [2021-10-13 22:45:54,727 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6559 conditions, 1732 events. 249/1732 cut-off events. For 15644/15778 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 16063 event pairs, 0 based on Foata normal form. 20/1570 useless extension candidates. Maximal degree in co-relation 6451. Up to 355 conditions per place. [2021-10-13 22:45:54,734 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 292 selfloop transitions, 78 changer transitions 16/432 dead transitions. [2021-10-13 22:45:54,734 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 432 transitions, 8466 flow [2021-10-13 22:45:54,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 22:45:54,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-13 22:45:54,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1272 transitions. [2021-10-13 22:45:54,736 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8502673796791443 [2021-10-13 22:45:54,736 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1272 transitions. [2021-10-13 22:45:54,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1272 transitions. [2021-10-13 22:45:54,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:54,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1272 transitions. [2021-10-13 22:45:54,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 57.81818181818182) internal successors, (1272), 22 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:54,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 68.0) internal successors, (1564), 23 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 22:45:54,739 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 68.0) internal successors, (1564), 23 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 22:45:54,739 INFO L186 Difference]: Start difference. First operand has 243 places, 352 transitions, 5866 flow. Second operand 22 states and 1272 transitions. [2021-10-13 22:45:54,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 432 transitions, 8466 flow [2021-10-13 22:45:54,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 432 transitions, 8106 flow, removed 95 selfloop flow, removed 21 redundant places. [2021-10-13 22:45:54,802 INFO L242 Difference]: Finished difference. Result has 254 places, 392 transitions, 6695 flow [2021-10-13 22:45:54,802 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=5580, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=6695, PETRI_PLACES=254, PETRI_TRANSITIONS=392} [2021-10-13 22:45:54,803 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 186 predicate places. [2021-10-13 22:45:54,803 INFO L470 AbstractCegarLoop]: Abstraction has has 254 places, 392 transitions, 6695 flow [2021-10-13 22:45:54,803 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 22:45:54,803 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:54,803 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 22:45:54,820 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 22:45:55,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:55,018 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:55,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:55,018 INFO L82 PathProgramCache]: Analyzing trace with hash -31731524, now seen corresponding path program 2 times [2021-10-13 22:45:55,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:55,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228773288] [2021-10-13 22:45:55,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:55,019 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:55,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:55,101 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 22:45:55,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:55,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228773288] [2021-10-13 22:45:55,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228773288] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:55,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786759844] [2021-10-13 22:45:55,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:45:55,102 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:55,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:45:55,102 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 22:45:55,103 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 22:45:55,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:45:55,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:45:55,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 22:45:55,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:45:55,723 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 22:45:55,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786759844] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:55,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:45:55,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-10-13 22:45:55,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354359314] [2021-10-13 22:45:55,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 22:45:55,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:55,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 22:45:55,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-10-13 22:45:55,724 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:55,725 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 392 transitions, 6695 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 22:45:55,725 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:55,725 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:55,725 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:56,161 INFO L129 PetriNetUnfolder]: 265/1869 cut-off events. [2021-10-13 22:45:56,161 INFO L130 PetriNetUnfolder]: For 16526/16648 co-relation queries the response was YES. [2021-10-13 22:45:56,173 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7058 conditions, 1869 events. 265/1869 cut-off events. For 16526/16648 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 17755 event pairs, 0 based on Foata normal form. 24/1696 useless extension candidates. Maximal degree in co-relation 6942. Up to 350 conditions per place. [2021-10-13 22:45:56,180 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 270 selfloop transitions, 117 changer transitions 16/449 dead transitions. [2021-10-13 22:45:56,180 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 449 transitions, 8864 flow [2021-10-13 22:45:56,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 22:45:56,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-13 22:45:56,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1387 transitions. [2021-10-13 22:45:56,181 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8498774509803921 [2021-10-13 22:45:56,181 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1387 transitions. [2021-10-13 22:45:56,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1387 transitions. [2021-10-13 22:45:56,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:56,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1387 transitions. [2021-10-13 22:45:56,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 57.791666666666664) internal successors, (1387), 24 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:56,184 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 22:45:56,184 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 22:45:56,184 INFO L186 Difference]: Start difference. First operand has 254 places, 392 transitions, 6695 flow. Second operand 24 states and 1387 transitions. [2021-10-13 22:45:56,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 449 transitions, 8864 flow [2021-10-13 22:45:56,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 449 transitions, 8764 flow, removed 31 selfloop flow, removed 11 redundant places. [2021-10-13 22:45:56,261 INFO L242 Difference]: Finished difference. Result has 272 places, 412 transitions, 7380 flow [2021-10-13 22:45:56,261 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=6613, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=7380, PETRI_PLACES=272, PETRI_TRANSITIONS=412} [2021-10-13 22:45:56,261 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 204 predicate places. [2021-10-13 22:45:56,261 INFO L470 AbstractCegarLoop]: Abstraction has has 272 places, 412 transitions, 7380 flow [2021-10-13 22:45:56,262 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 22:45:56,262 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:56,262 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 22:45:56,278 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 22:45:56,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-10-13 22:45:56,479 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:56,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:56,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1841449606, now seen corresponding path program 3 times [2021-10-13 22:45:56,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:56,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641015078] [2021-10-13 22:45:56,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:56,479 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:56,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:56,577 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 22:45:56,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:56,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641015078] [2021-10-13 22:45:56,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641015078] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:56,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309046944] [2021-10-13 22:45:56,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:45:56,578 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:56,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:45:56,578 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 22:45:56,580 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 22:45:57,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 22:45:57,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:45:57,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 22:45:57,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:45:57,284 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 22:45:57,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309046944] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:57,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:45:57,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-10-13 22:45:57,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242149466] [2021-10-13 22:45:57,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 22:45:57,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:57,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 22:45:57,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-10-13 22:45:57,287 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:57,287 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 412 transitions, 7380 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 22:45:57,287 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:57,287 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:57,287 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:57,807 INFO L129 PetriNetUnfolder]: 279/1967 cut-off events. [2021-10-13 22:45:57,807 INFO L130 PetriNetUnfolder]: For 19280/19420 co-relation queries the response was YES. [2021-10-13 22:45:57,821 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7666 conditions, 1967 events. 279/1967 cut-off events. For 19280/19420 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 18932 event pairs, 0 based on Foata normal form. 42/1802 useless extension candidates. Maximal degree in co-relation 7543. Up to 316 conditions per place. [2021-10-13 22:45:57,828 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 189 selfloop transitions, 213 changer transitions 16/464 dead transitions. [2021-10-13 22:45:57,828 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 464 transitions, 9558 flow [2021-10-13 22:45:57,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 22:45:57,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-10-13 22:45:57,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1735 transitions. [2021-10-13 22:45:57,830 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8504901960784313 [2021-10-13 22:45:57,830 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1735 transitions. [2021-10-13 22:45:57,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1735 transitions. [2021-10-13 22:45:57,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:57,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1735 transitions. [2021-10-13 22:45:57,832 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 22:45:57,833 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 22:45:57,834 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 22:45:57,834 INFO L186 Difference]: Start difference. First operand has 272 places, 412 transitions, 7380 flow. Second operand 30 states and 1735 transitions. [2021-10-13 22:45:57,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 464 transitions, 9558 flow [2021-10-13 22:45:57,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 464 transitions, 9407 flow, removed 60 selfloop flow, removed 14 redundant places. [2021-10-13 22:45:57,927 INFO L242 Difference]: Finished difference. Result has 291 places, 428 transitions, 8234 flow [2021-10-13 22:45:57,927 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=7291, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=8234, PETRI_PLACES=291, PETRI_TRANSITIONS=428} [2021-10-13 22:45:57,927 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 223 predicate places. [2021-10-13 22:45:57,927 INFO L470 AbstractCegarLoop]: Abstraction has has 291 places, 428 transitions, 8234 flow [2021-10-13 22:45:57,928 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 22:45:57,928 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:57,928 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 22:45:57,944 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 22:45:58,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:58,128 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:45:58,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:45:58,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1045241008, now seen corresponding path program 4 times [2021-10-13 22:45:58,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:45:58,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020613159] [2021-10-13 22:45:58,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:45:58,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:45:58,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:45:58,206 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 22:45:58,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:45:58,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020613159] [2021-10-13 22:45:58,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020613159] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:58,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813034955] [2021-10-13 22:45:58,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:45:58,206 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:45:58,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:45:58,211 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 22:45:58,212 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 22:45:58,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:45:58,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:45:58,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 22:45:58,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:45:58,916 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 22:45:58,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813034955] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:45:58,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:45:58,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-10-13 22:45:58,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773460693] [2021-10-13 22:45:58,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 22:45:58,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:45:58,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 22:45:58,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-10-13 22:45:58,918 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:45:58,919 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 428 transitions, 8234 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 22:45:58,919 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:45:58,919 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:45:58,919 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:45:59,707 INFO L129 PetriNetUnfolder]: 323/2227 cut-off events. [2021-10-13 22:45:59,708 INFO L130 PetriNetUnfolder]: For 26939/27148 co-relation queries the response was YES. [2021-10-13 22:45:59,724 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9221 conditions, 2227 events. 323/2227 cut-off events. For 26939/27148 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 21920 event pairs, 0 based on Foata normal form. 68/2062 useless extension candidates. Maximal degree in co-relation 9095. Up to 376 conditions per place. [2021-10-13 22:45:59,731 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 113 selfloop transitions, 344 changer transitions 28/531 dead transitions. [2021-10-13 22:45:59,731 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 531 transitions, 11917 flow [2021-10-13 22:45:59,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-13 22:45:59,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-10-13 22:45:59,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2431 transitions. [2021-10-13 22:45:59,735 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8511904761904762 [2021-10-13 22:45:59,735 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2431 transitions. [2021-10-13 22:45:59,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2431 transitions. [2021-10-13 22:45:59,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:45:59,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2431 transitions. [2021-10-13 22:45:59,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 57.88095238095238) internal successors, (2431), 42 states have internal predecessors, (2431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:45:59,739 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 22:45:59,739 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 22:45:59,739 INFO L186 Difference]: Start difference. First operand has 291 places, 428 transitions, 8234 flow. Second operand 42 states and 2431 transitions. [2021-10-13 22:45:59,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 531 transitions, 11917 flow [2021-10-13 22:45:59,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 531 transitions, 11429 flow, removed 145 selfloop flow, removed 27 redundant places. [2021-10-13 22:45:59,886 INFO L242 Difference]: Finished difference. Result has 318 places, 485 transitions, 10152 flow [2021-10-13 22:45:59,887 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=7943, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=295, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=10152, PETRI_PLACES=318, PETRI_TRANSITIONS=485} [2021-10-13 22:45:59,887 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 250 predicate places. [2021-10-13 22:45:59,887 INFO L470 AbstractCegarLoop]: Abstraction has has 318 places, 485 transitions, 10152 flow [2021-10-13 22:45:59,887 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 22:45:59,887 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:45:59,887 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 22:45:59,912 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 22:46:00,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:00,114 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:00,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:00,114 INFO L82 PathProgramCache]: Analyzing trace with hash -842108255, now seen corresponding path program 9 times [2021-10-13 22:46:00,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:00,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720127731] [2021-10-13 22:46:00,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:00,114 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:00,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:00,204 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 22:46:00,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:00,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720127731] [2021-10-13 22:46:00,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720127731] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:00,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232263613] [2021-10-13 22:46:00,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:46:00,205 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:00,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:00,206 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 22:46:00,207 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 22:46:00,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-13 22:46:00,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:00,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 22:46:00,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:00,989 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 22:46:00,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232263613] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:00,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:00,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-10-13 22:46:00,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114050300] [2021-10-13 22:46:00,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 22:46:00,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:00,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 22:46:00,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-10-13 22:46:00,991 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:00,992 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 485 transitions, 10152 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 22:46:00,992 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:00,992 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:00,992 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:01,352 INFO L129 PetriNetUnfolder]: 309/2192 cut-off events. [2021-10-13 22:46:01,352 INFO L130 PetriNetUnfolder]: For 21274/21489 co-relation queries the response was YES. [2021-10-13 22:46:01,368 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9251 conditions, 2192 events. 309/2192 cut-off events. For 21274/21489 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 21631 event pairs, 0 based on Foata normal form. 24/1985 useless extension candidates. Maximal degree in co-relation 9115. Up to 478 conditions per place. [2021-10-13 22:46:01,375 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 375 selfloop transitions, 82 changer transitions 5/508 dead transitions. [2021-10-13 22:46:01,376 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 508 transitions, 11684 flow [2021-10-13 22:46:01,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 22:46:01,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-13 22:46:01,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 810 transitions. [2021-10-13 22:46:01,388 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8508403361344538 [2021-10-13 22:46:01,388 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 810 transitions. [2021-10-13 22:46:01,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 810 transitions. [2021-10-13 22:46:01,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:01,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 810 transitions. [2021-10-13 22:46:01,389 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 22:46:01,389 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 22:46:01,390 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 22:46:01,390 INFO L186 Difference]: Start difference. First operand has 318 places, 485 transitions, 10152 flow. Second operand 14 states and 810 transitions. [2021-10-13 22:46:01,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 508 transitions, 11684 flow [2021-10-13 22:46:01,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 508 transitions, 11065 flow, removed 191 selfloop flow, removed 31 redundant places. [2021-10-13 22:46:01,525 INFO L242 Difference]: Finished difference. Result has 294 places, 487 transitions, 9831 flow [2021-10-13 22:46:01,526 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=9567, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9831, PETRI_PLACES=294, PETRI_TRANSITIONS=487} [2021-10-13 22:46:01,526 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 226 predicate places. [2021-10-13 22:46:01,526 INFO L470 AbstractCegarLoop]: Abstraction has has 294 places, 487 transitions, 9831 flow [2021-10-13 22:46:01,527 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 22:46:01,527 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:01,527 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 22:46:01,548 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 22:46:01,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-13 22:46:01,743 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:01,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:01,744 INFO L82 PathProgramCache]: Analyzing trace with hash -414965635, now seen corresponding path program 10 times [2021-10-13 22:46:01,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:01,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841239144] [2021-10-13 22:46:01,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:01,744 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:01,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:01,844 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 22:46:01,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:01,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841239144] [2021-10-13 22:46:01,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841239144] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:01,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193778584] [2021-10-13 22:46:01,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:46:01,845 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:01,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:01,846 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 22:46:01,849 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 22:46:02,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:46:02,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:02,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 22:46:02,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:02,604 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 22:46:02,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193778584] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:02,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:02,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-10-13 22:46:02,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888403015] [2021-10-13 22:46:02,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 22:46:02,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:02,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 22:46:02,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-10-13 22:46:02,606 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:02,607 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 487 transitions, 9831 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 22:46:02,607 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:02,607 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:02,607 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:02,970 INFO L129 PetriNetUnfolder]: 310/2194 cut-off events. [2021-10-13 22:46:02,971 INFO L130 PetriNetUnfolder]: For 20367/20564 co-relation queries the response was YES. [2021-10-13 22:46:02,984 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9019 conditions, 2194 events. 310/2194 cut-off events. For 20367/20564 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 21641 event pairs, 0 based on Foata normal form. 24/1988 useless extension candidates. Maximal degree in co-relation 8893. Up to 463 conditions per place. [2021-10-13 22:46:02,990 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 358 selfloop transitions, 100 changer transitions 5/509 dead transitions. [2021-10-13 22:46:02,991 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 509 transitions, 11332 flow [2021-10-13 22:46:02,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 22:46:02,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-13 22:46:02,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 868 transitions. [2021-10-13 22:46:02,992 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8509803921568627 [2021-10-13 22:46:02,992 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 868 transitions. [2021-10-13 22:46:02,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 868 transitions. [2021-10-13 22:46:02,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:02,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 868 transitions. [2021-10-13 22:46:02,993 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 22:46:02,994 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 22:46:02,994 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 22:46:02,994 INFO L186 Difference]: Start difference. First operand has 294 places, 487 transitions, 9831 flow. Second operand 15 states and 868 transitions. [2021-10-13 22:46:02,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 509 transitions, 11332 flow [2021-10-13 22:46:03,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 509 transitions, 11197 flow, removed 11 selfloop flow, removed 10 redundant places. [2021-10-13 22:46:03,135 INFO L242 Difference]: Finished difference. Result has 300 places, 489 transitions, 10026 flow [2021-10-13 22:46:03,136 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=9706, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=10026, PETRI_PLACES=300, PETRI_TRANSITIONS=489} [2021-10-13 22:46:03,136 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 232 predicate places. [2021-10-13 22:46:03,136 INFO L470 AbstractCegarLoop]: Abstraction has has 300 places, 489 transitions, 10026 flow [2021-10-13 22:46:03,136 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 22:46:03,136 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:03,136 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 22:46:03,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-13 22:46:03,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:03,351 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:03,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:03,352 INFO L82 PathProgramCache]: Analyzing trace with hash 327630679, now seen corresponding path program 11 times [2021-10-13 22:46:03,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:03,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469392743] [2021-10-13 22:46:03,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:03,352 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:03,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:03,442 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 22:46:03,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:03,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469392743] [2021-10-13 22:46:03,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469392743] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:03,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806346219] [2021-10-13 22:46:03,442 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:46:03,442 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:03,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:03,443 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 22:46:03,444 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 22:46:03,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 22:46:03,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:03,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 22:46:03,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:04,289 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 22:46:04,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806346219] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:04,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:04,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-10-13 22:46:04,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136846131] [2021-10-13 22:46:04,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 22:46:04,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:04,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 22:46:04,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-10-13 22:46:04,291 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:04,292 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 489 transitions, 10026 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 22:46:04,292 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:04,292 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:04,292 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:05,262 INFO L129 PetriNetUnfolder]: 355/2507 cut-off events. [2021-10-13 22:46:05,262 INFO L130 PetriNetUnfolder]: For 29172/29405 co-relation queries the response was YES. [2021-10-13 22:46:05,275 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10566 conditions, 2507 events. 355/2507 cut-off events. For 29172/29405 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 25360 event pairs, 0 based on Foata normal form. 78/2322 useless extension candidates. Maximal degree in co-relation 10438. Up to 426 conditions per place. [2021-10-13 22:46:05,283 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 71 selfloop transitions, 439 changer transitions 17/573 dead transitions. [2021-10-13 22:46:05,283 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 573 transitions, 13468 flow [2021-10-13 22:46:05,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-13 22:46:05,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-10-13 22:46:05,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2427 transitions. [2021-10-13 22:46:05,285 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8497899159663865 [2021-10-13 22:46:05,285 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2427 transitions. [2021-10-13 22:46:05,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2427 transitions. [2021-10-13 22:46:05,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:05,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2427 transitions. [2021-10-13 22:46:05,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 57.785714285714285) internal successors, (2427), 42 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:05,289 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 22:46:05,289 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 22:46:05,289 INFO L186 Difference]: Start difference. First operand has 300 places, 489 transitions, 10026 flow. Second operand 42 states and 2427 transitions. [2021-10-13 22:46:05,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 573 transitions, 13468 flow [2021-10-13 22:46:05,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 573 transitions, 13234 flow, removed 43 selfloop flow, removed 12 redundant places. [2021-10-13 22:46:05,420 INFO L242 Difference]: Finished difference. Result has 339 places, 548 transitions, 12529 flow [2021-10-13 22:46:05,420 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=9871, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=388, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=12529, PETRI_PLACES=339, PETRI_TRANSITIONS=548} [2021-10-13 22:46:05,421 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 271 predicate places. [2021-10-13 22:46:05,421 INFO L470 AbstractCegarLoop]: Abstraction has has 339 places, 548 transitions, 12529 flow [2021-10-13 22:46:05,421 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 22:46:05,421 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:05,421 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 22:46:05,439 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 22:46:05,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:05,639 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:05,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:05,639 INFO L82 PathProgramCache]: Analyzing trace with hash 2092091947, now seen corresponding path program 2 times [2021-10-13 22:46:05,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:05,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749424740] [2021-10-13 22:46:05,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:05,640 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:05,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:05,771 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 22:46:05,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:05,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749424740] [2021-10-13 22:46:05,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749424740] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:05,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704871499] [2021-10-13 22:46:05,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:46:05,772 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:05,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:05,773 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 22:46:05,778 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 22:46:06,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:46:06,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:06,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 22:46:06,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:06,636 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 22:46:06,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704871499] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:06,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:06,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-10-13 22:46:06,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684355012] [2021-10-13 22:46:06,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 22:46:06,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:06,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 22:46:06,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-10-13 22:46:06,638 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:06,639 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 548 transitions, 12529 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 22:46:06,639 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:06,639 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:06,639 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:07,876 INFO L129 PetriNetUnfolder]: 434/3082 cut-off events. [2021-10-13 22:46:07,876 INFO L130 PetriNetUnfolder]: For 39742/40106 co-relation queries the response was YES. [2021-10-13 22:46:07,895 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13695 conditions, 3082 events. 434/3082 cut-off events. For 39742/40106 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 32794 event pairs, 0 based on Foata normal form. 106/2863 useless extension candidates. Maximal degree in co-relation 13557. Up to 551 conditions per place. [2021-10-13 22:46:07,938 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 63 selfloop transitions, 567 changer transitions 22/698 dead transitions. [2021-10-13 22:46:07,939 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 698 transitions, 17877 flow [2021-10-13 22:46:07,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-10-13 22:46:07,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-10-13 22:46:07,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3291 transitions. [2021-10-13 22:46:07,941 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8490712074303406 [2021-10-13 22:46:07,941 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3291 transitions. [2021-10-13 22:46:07,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3291 transitions. [2021-10-13 22:46:07,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:07,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3291 transitions. [2021-10-13 22:46:07,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 57.73684210526316) internal successors, (3291), 57 states have internal predecessors, (3291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:07,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 68.0) internal successors, (3944), 58 states have internal predecessors, (3944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:07,947 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 68.0) internal successors, (3944), 58 states have internal predecessors, (3944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:07,947 INFO L186 Difference]: Start difference. First operand has 339 places, 548 transitions, 12529 flow. Second operand 57 states and 3291 transitions. [2021-10-13 22:46:07,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 698 transitions, 17877 flow [2021-10-13 22:46:08,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 698 transitions, 16878 flow, removed 417 selfloop flow, removed 28 redundant places. [2021-10-13 22:46:08,174 INFO L242 Difference]: Finished difference. Result has 377 places, 666 transitions, 16007 flow [2021-10-13 22:46:08,175 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=11799, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=457, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=16007, PETRI_PLACES=377, PETRI_TRANSITIONS=666} [2021-10-13 22:46:08,175 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 309 predicate places. [2021-10-13 22:46:08,175 INFO L470 AbstractCegarLoop]: Abstraction has has 377 places, 666 transitions, 16007 flow [2021-10-13 22:46:08,175 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 22:46:08,175 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:08,175 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 22:46:08,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-13 22:46:08,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:08,376 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:08,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:08,376 INFO L82 PathProgramCache]: Analyzing trace with hash 485464695, now seen corresponding path program 3 times [2021-10-13 22:46:08,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:08,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111965658] [2021-10-13 22:46:08,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:08,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:08,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:08,475 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 22:46:08,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:08,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111965658] [2021-10-13 22:46:08,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111965658] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:08,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920448813] [2021-10-13 22:46:08,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:46:08,475 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:08,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:08,488 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 22:46:08,491 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 22:46:09,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-13 22:46:09,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:09,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:46:09,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:09,359 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 22:46:09,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920448813] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:09,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:09,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-13 22:46:09,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515035354] [2021-10-13 22:46:09,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:46:09,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:09,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:46:09,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:46:09,361 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:09,362 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 666 transitions, 16007 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 22:46:09,362 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:09,362 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:09,362 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:10,215 INFO L129 PetriNetUnfolder]: 446/3205 cut-off events. [2021-10-13 22:46:10,215 INFO L130 PetriNetUnfolder]: For 39521/39806 co-relation queries the response was YES. [2021-10-13 22:46:10,238 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14494 conditions, 3205 events. 446/3205 cut-off events. For 39521/39806 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 34187 event pairs, 0 based on Foata normal form. 22/2888 useless extension candidates. Maximal degree in co-relation 14346. Up to 717 conditions per place. [2021-10-13 22:46:10,249 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 527 selfloop transitions, 125 changer transitions 11/709 dead transitions. [2021-10-13 22:46:10,249 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 709 transitions, 18905 flow [2021-10-13 22:46:10,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 22:46:10,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-13 22:46:10,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1390 transitions. [2021-10-13 22:46:10,251 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8517156862745098 [2021-10-13 22:46:10,251 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1390 transitions. [2021-10-13 22:46:10,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1390 transitions. [2021-10-13 22:46:10,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:10,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1390 transitions. [2021-10-13 22:46:10,252 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 22:46:10,253 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 22:46:10,253 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 22:46:10,253 INFO L186 Difference]: Start difference. First operand has 377 places, 666 transitions, 16007 flow. Second operand 24 states and 1390 transitions. [2021-10-13 22:46:10,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 709 transitions, 18905 flow [2021-10-13 22:46:10,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 709 transitions, 17861 flow, removed 354 selfloop flow, removed 38 redundant places. [2021-10-13 22:46:10,499 INFO L242 Difference]: Finished difference. Result has 361 places, 696 transitions, 16136 flow [2021-10-13 22:46:10,500 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=14987, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=16136, PETRI_PLACES=361, PETRI_TRANSITIONS=696} [2021-10-13 22:46:10,500 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 293 predicate places. [2021-10-13 22:46:10,500 INFO L470 AbstractCegarLoop]: Abstraction has has 361 places, 696 transitions, 16136 flow [2021-10-13 22:46:10,500 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 22:46:10,500 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:10,500 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 22:46:10,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-10-13 22:46:10,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-13 22:46:10,708 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:10,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:10,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1389619106, now seen corresponding path program 12 times [2021-10-13 22:46:10,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:10,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663835241] [2021-10-13 22:46:10,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:10,708 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:10,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:10,805 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 22:46:10,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:10,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663835241] [2021-10-13 22:46:10,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663835241] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:10,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274313538] [2021-10-13 22:46:10,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:46:10,806 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:10,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:10,806 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 22:46:10,808 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 22:46:11,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-13 22:46:11,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:11,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:46:11,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:11,810 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 22:46:11,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274313538] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:11,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:11,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-13 22:46:11,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505849126] [2021-10-13 22:46:11,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:46:11,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:11,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:46:11,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:46:11,812 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:11,813 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 696 transitions, 16136 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 22:46:11,813 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:11,813 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:11,813 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:12,418 INFO L129 PetriNetUnfolder]: 443/3194 cut-off events. [2021-10-13 22:46:12,418 INFO L130 PetriNetUnfolder]: For 33748/33971 co-relation queries the response was YES. [2021-10-13 22:46:12,445 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13990 conditions, 3194 events. 443/3194 cut-off events. For 33748/33971 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 34150 event pairs, 0 based on Foata normal form. 20/2876 useless extension candidates. Maximal degree in co-relation 13846. Up to 709 conditions per place. [2021-10-13 22:46:12,456 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 573 selfloop transitions, 103 changer transitions 5/727 dead transitions. [2021-10-13 22:46:12,456 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 727 transitions, 18340 flow [2021-10-13 22:46:12,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 22:46:12,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-13 22:46:12,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 981 transitions. [2021-10-13 22:46:12,457 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8486159169550173 [2021-10-13 22:46:12,458 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 981 transitions. [2021-10-13 22:46:12,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 981 transitions. [2021-10-13 22:46:12,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:12,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 981 transitions. [2021-10-13 22:46:12,459 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 22:46:12,460 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 22:46:12,460 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 22:46:12,460 INFO L186 Difference]: Start difference. First operand has 361 places, 696 transitions, 16136 flow. Second operand 17 states and 981 transitions. [2021-10-13 22:46:12,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 727 transitions, 18340 flow [2021-10-13 22:46:12,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 727 transitions, 18049 flow, removed 90 selfloop flow, removed 17 redundant places. [2021-10-13 22:46:12,676 INFO L242 Difference]: Finished difference. Result has 360 places, 698 transitions, 16178 flow [2021-10-13 22:46:12,676 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=15854, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=16178, PETRI_PLACES=360, PETRI_TRANSITIONS=698} [2021-10-13 22:46:12,676 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 292 predicate places. [2021-10-13 22:46:12,676 INFO L470 AbstractCegarLoop]: Abstraction has has 360 places, 698 transitions, 16178 flow [2021-10-13 22:46:12,677 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 22:46:12,677 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:12,677 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 22:46:12,694 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 22:46:12,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-13 22:46:12,894 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:12,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:12,895 INFO L82 PathProgramCache]: Analyzing trace with hash 466546456, now seen corresponding path program 13 times [2021-10-13 22:46:12,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:12,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528581949] [2021-10-13 22:46:12,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:12,895 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:12,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:13,061 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 22:46:13,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:13,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528581949] [2021-10-13 22:46:13,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528581949] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:13,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017026750] [2021-10-13 22:46:13,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:46:13,062 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:13,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:13,063 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 22:46:13,064 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 22:46:13,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:13,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:46:13,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:14,085 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 22:46:14,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017026750] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:14,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:14,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-13 22:46:14,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293581516] [2021-10-13 22:46:14,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:46:14,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:14,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:46:14,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:46:14,087 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:14,088 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 698 transitions, 16178 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 22:46:14,088 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:14,088 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:14,088 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:14,803 INFO L129 PetriNetUnfolder]: 444/3196 cut-off events. [2021-10-13 22:46:14,803 INFO L130 PetriNetUnfolder]: For 35503/35728 co-relation queries the response was YES. [2021-10-13 22:46:14,824 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14084 conditions, 3196 events. 444/3196 cut-off events. For 35503/35728 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 34169 event pairs, 0 based on Foata normal form. 20/2879 useless extension candidates. Maximal degree in co-relation 13939. Up to 687 conditions per place. [2021-10-13 22:46:14,833 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 549 selfloop transitions, 128 changer transitions 5/728 dead transitions. [2021-10-13 22:46:14,833 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 728 transitions, 18372 flow [2021-10-13 22:46:14,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 22:46:14,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-10-13 22:46:14,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1039 transitions. [2021-10-13 22:46:14,834 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8488562091503268 [2021-10-13 22:46:14,834 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1039 transitions. [2021-10-13 22:46:14,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1039 transitions. [2021-10-13 22:46:14,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:14,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1039 transitions. [2021-10-13 22:46:14,835 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 22:46:14,836 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 22:46:14,836 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 22:46:14,836 INFO L186 Difference]: Start difference. First operand has 360 places, 698 transitions, 16178 flow. Second operand 18 states and 1039 transitions. [2021-10-13 22:46:14,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 728 transitions, 18372 flow [2021-10-13 22:46:15,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 728 transitions, 18200 flow, removed 11 selfloop flow, removed 14 redundant places. [2021-10-13 22:46:15,064 INFO L242 Difference]: Finished difference. Result has 365 places, 700 transitions, 16416 flow [2021-10-13 22:46:15,065 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=16016, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=16416, PETRI_PLACES=365, PETRI_TRANSITIONS=700} [2021-10-13 22:46:15,065 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 297 predicate places. [2021-10-13 22:46:15,065 INFO L470 AbstractCegarLoop]: Abstraction has has 365 places, 700 transitions, 16416 flow [2021-10-13 22:46:15,066 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 22:46:15,066 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:15,066 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 22:46:15,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-10-13 22:46:15,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-13 22:46:15,268 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:15,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:15,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1636285390, now seen corresponding path program 14 times [2021-10-13 22:46:15,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:15,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140312879] [2021-10-13 22:46:15,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:15,269 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:15,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:15,362 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 22:46:15,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:15,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140312879] [2021-10-13 22:46:15,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140312879] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:15,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034214130] [2021-10-13 22:46:15,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:46:15,363 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:15,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:15,364 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 22:46:15,365 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 22:46:15,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:46:15,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:15,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:46:15,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:16,346 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 22:46:16,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034214130] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:16,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:16,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-10-13 22:46:16,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714579100] [2021-10-13 22:46:16,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 22:46:16,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:16,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 22:46:16,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-10-13 22:46:16,347 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:16,348 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 700 transitions, 16416 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 22:46:16,348 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:16,348 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:16,348 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:17,387 INFO L129 PetriNetUnfolder]: 479/3441 cut-off events. [2021-10-13 22:46:17,387 INFO L130 PetriNetUnfolder]: For 42959/43222 co-relation queries the response was YES. [2021-10-13 22:46:17,411 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15271 conditions, 3441 events. 479/3441 cut-off events. For 42959/43222 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 37347 event pairs, 0 based on Foata normal form. 58/3135 useless extension candidates. Maximal degree in co-relation 15124. Up to 609 conditions per place. [2021-10-13 22:46:17,421 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 352 selfloop transitions, 356 changer transitions 11/765 dead transitions. [2021-10-13 22:46:17,421 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 765 transitions, 19824 flow [2021-10-13 22:46:17,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 22:46:17,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-10-13 22:46:17,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1850 transitions. [2021-10-13 22:46:17,423 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8501838235294118 [2021-10-13 22:46:17,423 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1850 transitions. [2021-10-13 22:46:17,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1850 transitions. [2021-10-13 22:46:17,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:17,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1850 transitions. [2021-10-13 22:46:17,425 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 22:46:17,426 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 22:46:17,426 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 22:46:17,426 INFO L186 Difference]: Start difference. First operand has 365 places, 700 transitions, 16416 flow. Second operand 32 states and 1850 transitions. [2021-10-13 22:46:17,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 765 transitions, 19824 flow [2021-10-13 22:46:17,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 765 transitions, 19578 flow, removed 32 selfloop flow, removed 15 redundant places. [2021-10-13 22:46:17,680 INFO L242 Difference]: Finished difference. Result has 389 places, 746 transitions, 18332 flow [2021-10-13 22:46:17,681 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=16222, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=316, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=18332, PETRI_PLACES=389, PETRI_TRANSITIONS=746} [2021-10-13 22:46:17,681 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 321 predicate places. [2021-10-13 22:46:17,681 INFO L470 AbstractCegarLoop]: Abstraction has has 389 places, 746 transitions, 18332 flow [2021-10-13 22:46:17,682 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 22:46:17,682 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:17,682 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 22:46:17,702 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 22:46:17,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:17,895 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:17,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:17,896 INFO L82 PathProgramCache]: Analyzing trace with hash 757055780, now seen corresponding path program 15 times [2021-10-13 22:46:17,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:17,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238683432] [2021-10-13 22:46:17,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:17,896 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:17,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:17,998 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 22:46:17,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:17,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238683432] [2021-10-13 22:46:17,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238683432] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:17,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334796541] [2021-10-13 22:46:17,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:46:17,998 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:17,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:17,999 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 22:46:18,000 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 22:46:18,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-13 22:46:18,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:18,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 22:46:18,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:18,934 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 22:46:18,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334796541] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:18,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:18,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-10-13 22:46:18,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78640056] [2021-10-13 22:46:18,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 22:46:18,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:18,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 22:46:18,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-10-13 22:46:18,936 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:18,936 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 746 transitions, 18332 flow. Second operand has 15 states, 15 states have (on average 56.2) internal successors, (843), 15 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:18,936 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:18,936 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:18,936 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:19,595 INFO L129 PetriNetUnfolder]: 478/3448 cut-off events. [2021-10-13 22:46:19,596 INFO L130 PetriNetUnfolder]: For 42256/42577 co-relation queries the response was YES. [2021-10-13 22:46:19,624 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15732 conditions, 3448 events. 478/3448 cut-off events. For 42256/42577 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 37544 event pairs, 0 based on Foata normal form. 26/3109 useless extension candidates. Maximal degree in co-relation 15577. Up to 727 conditions per place. [2021-10-13 22:46:19,635 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 571 selfloop transitions, 152 changer transitions 5/774 dead transitions. [2021-10-13 22:46:19,635 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 774 transitions, 20676 flow [2021-10-13 22:46:19,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-13 22:46:19,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-13 22:46:19,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1097 transitions. [2021-10-13 22:46:19,636 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8490712074303406 [2021-10-13 22:46:19,636 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1097 transitions. [2021-10-13 22:46:19,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1097 transitions. [2021-10-13 22:46:19,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:19,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1097 transitions. [2021-10-13 22:46:19,637 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 22:46:19,638 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 22:46:19,638 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 22:46:19,638 INFO L186 Difference]: Start difference. First operand has 389 places, 746 transitions, 18332 flow. Second operand 19 states and 1097 transitions. [2021-10-13 22:46:19,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 774 transitions, 20676 flow [2021-10-13 22:46:19,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 774 transitions, 20145 flow, removed 125 selfloop flow, removed 26 redundant places. [2021-10-13 22:46:19,923 INFO L242 Difference]: Finished difference. Result has 380 places, 749 transitions, 18324 flow [2021-10-13 22:46:19,924 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=17826, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=18324, PETRI_PLACES=380, PETRI_TRANSITIONS=749} [2021-10-13 22:46:19,924 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 312 predicate places. [2021-10-13 22:46:19,924 INFO L470 AbstractCegarLoop]: Abstraction has has 380 places, 749 transitions, 18324 flow [2021-10-13 22:46:19,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 56.2) internal successors, (843), 15 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:19,924 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:19,924 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 22:46:19,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-13 22:46:20,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:20,139 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:20,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:20,140 INFO L82 PathProgramCache]: Analyzing trace with hash 142128536, now seen corresponding path program 16 times [2021-10-13 22:46:20,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:20,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774594479] [2021-10-13 22:46:20,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:20,140 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:20,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:20,229 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 22:46:20,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:20,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774594479] [2021-10-13 22:46:20,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774594479] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:20,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77180340] [2021-10-13 22:46:20,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:46:20,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:20,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:20,230 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 22:46:20,231 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 22:46:20,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:46:20,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:20,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:46:20,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:21,312 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 22:46:21,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77180340] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:21,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:21,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-13 22:46:21,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270322365] [2021-10-13 22:46:21,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:46:21,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:21,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:46:21,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:46:21,314 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:21,314 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 749 transitions, 18324 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 22:46:21,314 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:21,315 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:21,315 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:22,062 INFO L129 PetriNetUnfolder]: 481/3461 cut-off events. [2021-10-13 22:46:22,063 INFO L130 PetriNetUnfolder]: For 42845/43138 co-relation queries the response was YES. [2021-10-13 22:46:22,095 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15830 conditions, 3461 events. 481/3461 cut-off events. For 42845/43138 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 37772 event pairs, 0 based on Foata normal form. 26/3122 useless extension candidates. Maximal degree in co-relation 15677. Up to 721 conditions per place. [2021-10-13 22:46:22,109 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 564 selfloop transitions, 165 changer transitions 5/780 dead transitions. [2021-10-13 22:46:22,109 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 780 transitions, 20716 flow [2021-10-13 22:46:22,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 22:46:22,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-13 22:46:22,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1155 transitions. [2021-10-13 22:46:22,110 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8492647058823529 [2021-10-13 22:46:22,110 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1155 transitions. [2021-10-13 22:46:22,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1155 transitions. [2021-10-13 22:46:22,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:22,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1155 transitions. [2021-10-13 22:46:22,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 57.75) internal successors, (1155), 20 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:22,113 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 22:46:22,113 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 22:46:22,113 INFO L186 Difference]: Start difference. First operand has 380 places, 749 transitions, 18324 flow. Second operand 20 states and 1155 transitions. [2021-10-13 22:46:22,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 780 transitions, 20716 flow [2021-10-13 22:46:22,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 780 transitions, 20500 flow, removed 12 selfloop flow, removed 15 redundant places. [2021-10-13 22:46:22,396 INFO L242 Difference]: Finished difference. Result has 385 places, 752 transitions, 18657 flow [2021-10-13 22:46:22,397 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=18118, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=18657, PETRI_PLACES=385, PETRI_TRANSITIONS=752} [2021-10-13 22:46:22,397 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 317 predicate places. [2021-10-13 22:46:22,397 INFO L470 AbstractCegarLoop]: Abstraction has has 385 places, 752 transitions, 18657 flow [2021-10-13 22:46:22,397 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 22:46:22,397 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:22,397 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 22:46:22,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-10-13 22:46:22,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-10-13 22:46:22,598 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:22,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:22,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1024321256, now seen corresponding path program 17 times [2021-10-13 22:46:22,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:22,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723913594] [2021-10-13 22:46:22,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:22,599 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:22,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:22,691 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 22:46:22,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:22,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723913594] [2021-10-13 22:46:22,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723913594] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:22,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433351336] [2021-10-13 22:46:22,691 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:46:22,692 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:22,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:22,692 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 22:46:22,693 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 22:46:23,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-13 22:46:23,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:23,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:46:23,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:23,765 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 22:46:23,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433351336] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:23,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:23,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-10-13 22:46:23,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53341286] [2021-10-13 22:46:23,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 22:46:23,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:23,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 22:46:23,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-10-13 22:46:23,767 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:23,768 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 752 transitions, 18657 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 22:46:23,768 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:23,768 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:23,768 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:24,815 INFO L129 PetriNetUnfolder]: 508/3657 cut-off events. [2021-10-13 22:46:24,815 INFO L130 PetriNetUnfolder]: For 51440/51767 co-relation queries the response was YES. [2021-10-13 22:46:24,847 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16975 conditions, 3657 events. 508/3657 cut-off events. For 51440/51767 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 40209 event pairs, 0 based on Foata normal form. 66/3336 useless extension candidates. Maximal degree in co-relation 16821. Up to 642 conditions per place. [2021-10-13 22:46:24,859 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 381 selfloop transitions, 366 changer transitions 11/804 dead transitions. [2021-10-13 22:46:24,859 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 804 transitions, 22155 flow [2021-10-13 22:46:24,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 22:46:24,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-10-13 22:46:24,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1735 transitions. [2021-10-13 22:46:24,860 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8504901960784313 [2021-10-13 22:46:24,860 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1735 transitions. [2021-10-13 22:46:24,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1735 transitions. [2021-10-13 22:46:24,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:24,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1735 transitions. [2021-10-13 22:46:24,862 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 22:46:24,863 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 22:46:24,864 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 22:46:24,864 INFO L186 Difference]: Start difference. First operand has 385 places, 752 transitions, 18657 flow. Second operand 30 states and 1735 transitions. [2021-10-13 22:46:24,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 804 transitions, 22155 flow [2021-10-13 22:46:25,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 804 transitions, 21857 flow, removed 36 selfloop flow, removed 17 redundant places. [2021-10-13 22:46:25,156 INFO L242 Difference]: Finished difference. Result has 404 places, 784 transitions, 20477 flow [2021-10-13 22:46:25,156 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=18423, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=20477, PETRI_PLACES=404, PETRI_TRANSITIONS=784} [2021-10-13 22:46:25,156 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 336 predicate places. [2021-10-13 22:46:25,157 INFO L470 AbstractCegarLoop]: Abstraction has has 404 places, 784 transitions, 20477 flow [2021-10-13 22:46:25,157 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 22:46:25,157 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:25,157 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 22:46:25,174 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 22:46:25,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-13 22:46:25,357 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:25,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:25,358 INFO L82 PathProgramCache]: Analyzing trace with hash 305710708, now seen corresponding path program 18 times [2021-10-13 22:46:25,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:25,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900452267] [2021-10-13 22:46:25,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:25,358 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:25,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:25,450 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 22:46:25,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:25,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900452267] [2021-10-13 22:46:25,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900452267] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:25,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373608830] [2021-10-13 22:46:25,450 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:46:25,451 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:25,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:25,451 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 22:46:25,452 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 22:46:26,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-13 22:46:26,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:26,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 22:46:26,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:26,448 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 22:46:26,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373608830] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:26,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:26,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-10-13 22:46:26,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051793256] [2021-10-13 22:46:26,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 22:46:26,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:26,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 22:46:26,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-10-13 22:46:26,449 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:26,450 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 784 transitions, 20477 flow. Second operand has 15 states, 15 states have (on average 56.2) internal successors, (843), 15 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:26,450 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:26,450 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:26,450 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:27,158 INFO L129 PetriNetUnfolder]: 505/3639 cut-off events. [2021-10-13 22:46:27,158 INFO L130 PetriNetUnfolder]: For 50925/51304 co-relation queries the response was YES. [2021-10-13 22:46:27,194 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17344 conditions, 3639 events. 505/3639 cut-off events. For 50925/51304 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 40022 event pairs, 0 based on Foata normal form. 28/3282 useless extension candidates. Maximal degree in co-relation 17183. Up to 750 conditions per place. [2021-10-13 22:46:27,206 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 579 selfloop transitions, 182 changer transitions 5/812 dead transitions. [2021-10-13 22:46:27,207 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 812 transitions, 22944 flow [2021-10-13 22:46:27,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-13 22:46:27,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-13 22:46:27,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1213 transitions. [2021-10-13 22:46:27,208 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8494397759103641 [2021-10-13 22:46:27,208 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1213 transitions. [2021-10-13 22:46:27,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1213 transitions. [2021-10-13 22:46:27,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:27,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1213 transitions. [2021-10-13 22:46:27,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 57.76190476190476) internal successors, (1213), 21 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:27,210 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 22:46:27,210 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 22:46:27,210 INFO L186 Difference]: Start difference. First operand has 404 places, 784 transitions, 20477 flow. Second operand 21 states and 1213 transitions. [2021-10-13 22:46:27,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 812 transitions, 22944 flow [2021-10-13 22:46:27,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 812 transitions, 22603 flow, removed 101 selfloop flow, removed 21 redundant places. [2021-10-13 22:46:27,571 INFO L242 Difference]: Finished difference. Result has 402 places, 785 transitions, 20679 flow [2021-10-13 22:46:27,572 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=20152, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=784, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=20679, PETRI_PLACES=402, PETRI_TRANSITIONS=785} [2021-10-13 22:46:27,572 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 334 predicate places. [2021-10-13 22:46:27,572 INFO L470 AbstractCegarLoop]: Abstraction has has 402 places, 785 transitions, 20679 flow [2021-10-13 22:46:27,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 56.2) internal successors, (843), 15 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:27,572 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:27,572 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 22:46:27,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-10-13 22:46:27,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:27,777 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:27,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:27,777 INFO L82 PathProgramCache]: Analyzing trace with hash 887166350, now seen corresponding path program 19 times [2021-10-13 22:46:27,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:27,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748667872] [2021-10-13 22:46:27,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:27,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:27,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:27,875 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 22:46:27,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:27,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748667872] [2021-10-13 22:46:27,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748667872] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:27,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18387856] [2021-10-13 22:46:27,875 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:46:27,876 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:27,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:27,876 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 22:46:27,877 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 22:46:28,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:28,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:46:28,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:28,984 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 22:46:28,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18387856] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:28,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:28,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-10-13 22:46:28,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213331068] [2021-10-13 22:46:28,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 22:46:28,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:28,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 22:46:28,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-10-13 22:46:28,987 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:28,988 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 785 transitions, 20679 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 22:46:28,988 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:28,988 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:28,988 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:29,963 INFO L129 PetriNetUnfolder]: 528/3786 cut-off events. [2021-10-13 22:46:29,963 INFO L130 PetriNetUnfolder]: For 60311/60732 co-relation queries the response was YES. [2021-10-13 22:46:30,008 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18522 conditions, 3786 events. 528/3786 cut-off events. For 60311/60732 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 41957 event pairs, 0 based on Foata normal form. 60/3447 useless extension candidates. Maximal degree in co-relation 18361. Up to 679 conditions per place. [2021-10-13 22:46:30,022 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 431 selfloop transitions, 340 changer transitions 11/828 dead transitions. [2021-10-13 22:46:30,022 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 828 transitions, 24217 flow [2021-10-13 22:46:30,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 22:46:30,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-13 22:46:30,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1620 transitions. [2021-10-13 22:46:30,036 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8508403361344538 [2021-10-13 22:46:30,036 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1620 transitions. [2021-10-13 22:46:30,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1620 transitions. [2021-10-13 22:46:30,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:30,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1620 transitions. [2021-10-13 22:46:30,037 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 22:46:30,039 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 22:46:30,039 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 22:46:30,039 INFO L186 Difference]: Start difference. First operand has 402 places, 785 transitions, 20679 flow. Second operand 28 states and 1620 transitions. [2021-10-13 22:46:30,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 828 transitions, 24217 flow [2021-10-13 22:46:30,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 828 transitions, 23871 flow, removed 22 selfloop flow, removed 21 redundant places. [2021-10-13 22:46:30,506 INFO L242 Difference]: Finished difference. Result has 413 places, 809 transitions, 22288 flow [2021-10-13 22:46:30,507 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=20377, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=785, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=320, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=22288, PETRI_PLACES=413, PETRI_TRANSITIONS=809} [2021-10-13 22:46:30,507 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 345 predicate places. [2021-10-13 22:46:30,507 INFO L470 AbstractCegarLoop]: Abstraction has has 413 places, 809 transitions, 22288 flow [2021-10-13 22:46:30,507 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 22:46:30,507 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:30,507 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 22:46:30,528 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 22:46:30,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:30,719 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:30,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:30,720 INFO L82 PathProgramCache]: Analyzing trace with hash -71069170, now seen corresponding path program 20 times [2021-10-13 22:46:30,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:30,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636972261] [2021-10-13 22:46:30,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:30,720 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:30,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:30,825 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 22:46:30,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:30,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636972261] [2021-10-13 22:46:30,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636972261] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:30,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272245362] [2021-10-13 22:46:30,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:46:30,826 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:30,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:30,827 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 22:46:30,828 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 22:46:31,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:46:31,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:31,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:46:31,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:31,952 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 22:46:31,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272245362] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:31,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:31,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-13 22:46:31,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062676998] [2021-10-13 22:46:31,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:46:31,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:31,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:46:31,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:46:31,953 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:31,954 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 809 transitions, 22288 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 22:46:31,954 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:31,954 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:31,954 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:33,439 INFO L129 PetriNetUnfolder]: 594/4280 cut-off events. [2021-10-13 22:46:33,439 INFO L130 PetriNetUnfolder]: For 75867/76374 co-relation queries the response was YES. [2021-10-13 22:46:33,485 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21473 conditions, 4280 events. 594/4280 cut-off events. For 75867/76374 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 48829 event pairs, 0 based on Foata normal form. 118/3945 useless extension candidates. Maximal degree in co-relation 21308. Up to 728 conditions per place. [2021-10-13 22:46:33,501 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 161 selfloop transitions, 713 changer transitions 17/937 dead transitions. [2021-10-13 22:46:33,501 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 937 transitions, 28646 flow [2021-10-13 22:46:33,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-10-13 22:46:33,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-10-13 22:46:33,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3002 transitions. [2021-10-13 22:46:33,503 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8489819004524887 [2021-10-13 22:46:33,503 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3002 transitions. [2021-10-13 22:46:33,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3002 transitions. [2021-10-13 22:46:33,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:33,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3002 transitions. [2021-10-13 22:46:33,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 57.73076923076923) internal successors, (3002), 52 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:33,508 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 22:46:33,508 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 22:46:33,508 INFO L186 Difference]: Start difference. First operand has 413 places, 809 transitions, 22288 flow. Second operand 52 states and 3002 transitions. [2021-10-13 22:46:33,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 937 transitions, 28646 flow [2021-10-13 22:46:33,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 937 transitions, 28318 flow, removed 80 selfloop flow, removed 21 redundant places. [2021-10-13 22:46:33,981 INFO L242 Difference]: Finished difference. Result has 453 places, 905 transitions, 27146 flow [2021-10-13 22:46:33,981 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=21996, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=809, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=625, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=27146, PETRI_PLACES=453, PETRI_TRANSITIONS=905} [2021-10-13 22:46:33,981 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 385 predicate places. [2021-10-13 22:46:33,982 INFO L470 AbstractCegarLoop]: Abstraction has has 453 places, 905 transitions, 27146 flow [2021-10-13 22:46:33,982 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 22:46:33,982 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:33,982 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 22:46:34,009 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 22:46:34,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:34,195 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:34,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:34,196 INFO L82 PathProgramCache]: Analyzing trace with hash -257841262, now seen corresponding path program 3 times [2021-10-13 22:46:34,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:34,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961409837] [2021-10-13 22:46:34,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:34,196 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:34,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:34,303 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 22:46:34,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:34,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961409837] [2021-10-13 22:46:34,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961409837] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:34,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015198412] [2021-10-13 22:46:34,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:46:34,304 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:34,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:34,305 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 22:46:34,305 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 22:46:35,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-13 22:46:35,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:35,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:46:35,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:35,592 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 22:46:35,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015198412] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:35,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:35,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-13 22:46:35,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591834883] [2021-10-13 22:46:35,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:46:35,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:35,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:46:35,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:46:35,594 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:35,595 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 905 transitions, 27146 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 22:46:35,595 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:35,595 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:35,595 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:36,685 INFO L129 PetriNetUnfolder]: 607/4436 cut-off events. [2021-10-13 22:46:36,685 INFO L130 PetriNetUnfolder]: For 73752/74313 co-relation queries the response was YES. [2021-10-13 22:46:36,733 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22946 conditions, 4436 events. 607/4436 cut-off events. For 73752/74313 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 51199 event pairs, 0 based on Foata normal form. 36/4001 useless extension candidates. Maximal degree in co-relation 22771. Up to 934 conditions per place. [2021-10-13 22:46:36,749 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 759 selfloop transitions, 185 changer transitions 5/995 dead transitions. [2021-10-13 22:46:36,749 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 995 transitions, 31522 flow [2021-10-13 22:46:36,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 22:46:36,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-10-13 22:46:36,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1494 transitions. [2021-10-13 22:46:36,750 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8450226244343891 [2021-10-13 22:46:36,751 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1494 transitions. [2021-10-13 22:46:36,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1494 transitions. [2021-10-13 22:46:36,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:36,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1494 transitions. [2021-10-13 22:46:36,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 57.46153846153846) internal successors, (1494), 26 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:36,753 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 22:46:36,753 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 22:46:36,753 INFO L186 Difference]: Start difference. First operand has 453 places, 905 transitions, 27146 flow. Second operand 26 states and 1494 transitions. [2021-10-13 22:46:36,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 995 transitions, 31522 flow [2021-10-13 22:46:37,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 995 transitions, 30608 flow, removed 320 selfloop flow, removed 35 redundant places. [2021-10-13 22:46:37,255 INFO L242 Difference]: Finished difference. Result has 443 places, 936 transitions, 27733 flow [2021-10-13 22:46:37,256 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=26283, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=905, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=720, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=27733, PETRI_PLACES=443, PETRI_TRANSITIONS=936} [2021-10-13 22:46:37,256 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 375 predicate places. [2021-10-13 22:46:37,256 INFO L470 AbstractCegarLoop]: Abstraction has has 443 places, 936 transitions, 27733 flow [2021-10-13 22:46:37,256 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 22:46:37,256 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:37,256 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 22:46:37,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-10-13 22:46:37,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-13 22:46:37,457 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:37,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:37,457 INFO L82 PathProgramCache]: Analyzing trace with hash -2136524914, now seen corresponding path program 4 times [2021-10-13 22:46:37,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:37,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928276723] [2021-10-13 22:46:37,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:37,458 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:37,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:37,563 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 22:46:37,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:37,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928276723] [2021-10-13 22:46:37,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928276723] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:37,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163770314] [2021-10-13 22:46:37,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:46:37,564 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:37,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:37,564 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 22:46:37,565 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 22:46:38,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:46:38,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:38,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:46:38,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:38,846 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 22:46:38,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163770314] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:38,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:38,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-13 22:46:38,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459838712] [2021-10-13 22:46:38,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:46:38,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:38,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:46:38,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:46:38,849 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:38,850 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 936 transitions, 27733 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 22:46:38,850 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:38,850 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:38,850 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:39,977 INFO L129 PetriNetUnfolder]: 608/4452 cut-off events. [2021-10-13 22:46:39,977 INFO L130 PetriNetUnfolder]: For 73839/74325 co-relation queries the response was YES. [2021-10-13 22:46:40,021 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22933 conditions, 4452 events. 608/4452 cut-off events. For 73839/74325 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 51434 event pairs, 0 based on Foata normal form. 36/4015 useless extension candidates. Maximal degree in co-relation 22758. Up to 975 conditions per place. [2021-10-13 22:46:40,036 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 780 selfloop transitions, 149 changer transitions 5/980 dead transitions. [2021-10-13 22:46:40,036 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 980 transitions, 30910 flow [2021-10-13 22:46:40,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 22:46:40,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-13 22:46:40,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1380 transitions. [2021-10-13 22:46:40,037 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8455882352941176 [2021-10-13 22:46:40,038 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1380 transitions. [2021-10-13 22:46:40,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1380 transitions. [2021-10-13 22:46:40,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:40,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1380 transitions. [2021-10-13 22:46:40,039 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 22:46:40,040 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 22:46:40,040 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 22:46:40,040 INFO L186 Difference]: Start difference. First operand has 443 places, 936 transitions, 27733 flow. Second operand 24 states and 1380 transitions. [2021-10-13 22:46:40,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 980 transitions, 30910 flow [2021-10-13 22:46:40,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 980 transitions, 30671 flow, removed 20 selfloop flow, removed 18 redundant places. [2021-10-13 22:46:40,508 INFO L242 Difference]: Finished difference. Result has 450 places, 938 transitions, 28004 flow [2021-10-13 22:46:40,509 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=27504, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=936, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=787, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=28004, PETRI_PLACES=450, PETRI_TRANSITIONS=938} [2021-10-13 22:46:40,509 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 382 predicate places. [2021-10-13 22:46:40,509 INFO L470 AbstractCegarLoop]: Abstraction has has 450 places, 938 transitions, 28004 flow [2021-10-13 22:46:40,509 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 22:46:40,509 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:40,509 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 22:46:40,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-13 22:46:40,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-13 22:46:40,710 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:40,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:40,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1598324300, now seen corresponding path program 5 times [2021-10-13 22:46:40,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:40,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267657872] [2021-10-13 22:46:40,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:40,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:40,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:40,800 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 22:46:40,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:40,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267657872] [2021-10-13 22:46:40,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267657872] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:40,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786094610] [2021-10-13 22:46:40,800 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:46:40,800 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:40,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:40,801 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 22:46:40,801 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 22:46:41,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 22:46:41,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:41,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:46:41,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:42,147 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 22:46:42,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786094610] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:42,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:42,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-13 22:46:42,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981323274] [2021-10-13 22:46:42,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:46:42,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:42,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:46:42,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:46:42,149 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:42,150 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 938 transitions, 28004 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 22:46:42,150 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:42,150 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:42,150 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:43,452 INFO L129 PetriNetUnfolder]: 616/4524 cut-off events. [2021-10-13 22:46:43,452 INFO L130 PetriNetUnfolder]: For 76778/77269 co-relation queries the response was YES. [2021-10-13 22:46:43,491 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23313 conditions, 4524 events. 616/4524 cut-off events. For 76778/77269 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 52560 event pairs, 0 based on Foata normal form. 36/4079 useless extension candidates. Maximal degree in co-relation 23136. Up to 908 conditions per place. [2021-10-13 22:46:43,506 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 729 selfloop transitions, 230 changer transitions 5/1010 dead transitions. [2021-10-13 22:46:43,507 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 1010 transitions, 31908 flow [2021-10-13 22:46:43,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-13 22:46:43,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-10-13 22:46:43,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1552 transitions. [2021-10-13 22:46:43,508 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8453159041394336 [2021-10-13 22:46:43,508 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1552 transitions. [2021-10-13 22:46:43,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1552 transitions. [2021-10-13 22:46:43,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:43,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1552 transitions. [2021-10-13 22:46:43,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 57.48148148148148) internal successors, (1552), 27 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:43,510 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 22:46:43,511 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 22:46:43,511 INFO L186 Difference]: Start difference. First operand has 450 places, 938 transitions, 28004 flow. Second operand 27 states and 1552 transitions. [2021-10-13 22:46:43,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 1010 transitions, 31908 flow [2021-10-13 22:46:43,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 1010 transitions, 31705 flow, removed 14 selfloop flow, removed 16 redundant places. [2021-10-13 22:46:43,988 INFO L242 Difference]: Finished difference. Result has 464 places, 951 transitions, 28890 flow [2021-10-13 22:46:43,988 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=27811, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=938, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=708, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=28890, PETRI_PLACES=464, PETRI_TRANSITIONS=951} [2021-10-13 22:46:43,989 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 396 predicate places. [2021-10-13 22:46:43,989 INFO L470 AbstractCegarLoop]: Abstraction has has 464 places, 951 transitions, 28890 flow [2021-10-13 22:46:43,989 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 22:46:43,989 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:43,989 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 22:46:44,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-10-13 22:46:44,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-13 22:46:44,190 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:44,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:44,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1043782648, now seen corresponding path program 6 times [2021-10-13 22:46:44,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:44,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291546407] [2021-10-13 22:46:44,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:44,190 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:44,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:44,296 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 22:46:44,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:44,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291546407] [2021-10-13 22:46:44,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291546407] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:44,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191597952] [2021-10-13 22:46:44,296 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:46:44,296 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:44,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:44,297 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 22:46:44,297 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 22:46:45,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-13 22:46:45,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:45,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:46:45,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:45,621 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 22:46:45,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191597952] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:45,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:45,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-13 22:46:45,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194080737] [2021-10-13 22:46:45,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:46:45,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:45,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:46:45,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:46:45,623 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:45,624 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 951 transitions, 28890 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 22:46:45,624 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:45,624 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:45,624 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:46,835 INFO L129 PetriNetUnfolder]: 617/4526 cut-off events. [2021-10-13 22:46:46,835 INFO L130 PetriNetUnfolder]: For 81155/81638 co-relation queries the response was YES. [2021-10-13 22:46:46,889 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23662 conditions, 4526 events. 617/4526 cut-off events. For 81155/81638 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 52503 event pairs, 0 based on Foata normal form. 36/4082 useless extension candidates. Maximal degree in co-relation 23481. Up to 954 conditions per place. [2021-10-13 22:46:46,910 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 755 selfloop transitions, 189 changer transitions 5/995 dead transitions. [2021-10-13 22:46:46,910 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 995 transitions, 32119 flow [2021-10-13 22:46:46,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-13 22:46:46,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-10-13 22:46:46,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1438 transitions. [2021-10-13 22:46:46,912 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8458823529411764 [2021-10-13 22:46:46,912 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1438 transitions. [2021-10-13 22:46:46,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1438 transitions. [2021-10-13 22:46:47,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:47,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1438 transitions. [2021-10-13 22:46:47,006 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 22:46:47,006 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 22:46:47,007 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 22:46:47,007 INFO L186 Difference]: Start difference. First operand has 464 places, 951 transitions, 28890 flow. Second operand 25 states and 1438 transitions. [2021-10-13 22:46:47,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 995 transitions, 32119 flow [2021-10-13 22:46:47,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 995 transitions, 31868 flow, removed 11 selfloop flow, removed 21 redundant places. [2021-10-13 22:46:47,547 INFO L242 Difference]: Finished difference. Result has 469 places, 953 transitions, 29275 flow [2021-10-13 22:46:47,548 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=28649, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=951, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=762, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=29275, PETRI_PLACES=469, PETRI_TRANSITIONS=953} [2021-10-13 22:46:47,548 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 401 predicate places. [2021-10-13 22:46:47,548 INFO L470 AbstractCegarLoop]: Abstraction has has 469 places, 953 transitions, 29275 flow [2021-10-13 22:46:47,548 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 22:46:47,548 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:47,548 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 22:46:47,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-10-13 22:46:47,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-13 22:46:47,749 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:47,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:47,749 INFO L82 PathProgramCache]: Analyzing trace with hash 699809356, now seen corresponding path program 7 times [2021-10-13 22:46:47,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:47,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553501828] [2021-10-13 22:46:47,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:47,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:47,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:47,854 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 22:46:47,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:47,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553501828] [2021-10-13 22:46:47,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553501828] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:47,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709585730] [2021-10-13 22:46:47,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:46:47,854 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:47,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:47,855 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 22:46:47,856 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 22:46:48,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:48,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:46:48,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:49,222 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 22:46:49,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709585730] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:49,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:49,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-13 22:46:49,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016990335] [2021-10-13 22:46:49,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:46:49,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:49,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:46:49,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:46:49,224 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:49,224 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 953 transitions, 29275 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 22:46:49,225 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:49,225 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:49,225 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:51,433 INFO L129 PetriNetUnfolder]: 675/4920 cut-off events. [2021-10-13 22:46:51,433 INFO L130 PetriNetUnfolder]: For 103827/104455 co-relation queries the response was YES. [2021-10-13 22:46:51,476 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26210 conditions, 4920 events. 675/4920 cut-off events. For 103827/104455 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 58307 event pairs, 0 based on Foata normal form. 174/4573 useless extension candidates. Maximal degree in co-relation 26027. Up to 856 conditions per place. [2021-10-13 22:46:51,493 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 144 selfloop transitions, 853 changer transitions 17/1060 dead transitions. [2021-10-13 22:46:51,493 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 1060 transitions, 35465 flow [2021-10-13 22:46:51,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-10-13 22:46:51,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-10-13 22:46:51,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3289 transitions. [2021-10-13 22:46:51,495 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8485552115583075 [2021-10-13 22:46:51,495 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3289 transitions. [2021-10-13 22:46:51,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3289 transitions. [2021-10-13 22:46:51,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:51,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3289 transitions. [2021-10-13 22:46:51,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 57.70175438596491) internal successors, (3289), 57 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:51,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 68.0) internal successors, (3944), 58 states have internal predecessors, (3944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:51,500 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 68.0) internal successors, (3944), 58 states have internal predecessors, (3944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:51,500 INFO L186 Difference]: Start difference. First operand has 469 places, 953 transitions, 29275 flow. Second operand 57 states and 3289 transitions. [2021-10-13 22:46:51,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 1060 transitions, 35465 flow [2021-10-13 22:46:52,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 1060 transitions, 35176 flow, removed 24 selfloop flow, removed 22 redundant places. [2021-10-13 22:46:52,097 INFO L242 Difference]: Finished difference. Result has 512 places, 1028 transitions, 33784 flow [2021-10-13 22:46:52,097 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=29024, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=953, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=787, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=33784, PETRI_PLACES=512, PETRI_TRANSITIONS=1028} [2021-10-13 22:46:52,097 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 444 predicate places. [2021-10-13 22:46:52,098 INFO L470 AbstractCegarLoop]: Abstraction has has 512 places, 1028 transitions, 33784 flow [2021-10-13 22:46:52,098 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 22:46:52,098 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:52,098 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 22:46:52,116 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 22:46:52,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:52,311 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:52,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:52,312 INFO L82 PathProgramCache]: Analyzing trace with hash -448545202, now seen corresponding path program 8 times [2021-10-13 22:46:52,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:52,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879013961] [2021-10-13 22:46:52,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:52,312 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:52,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:52,399 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 22:46:52,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:52,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879013961] [2021-10-13 22:46:52,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879013961] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:52,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107986790] [2021-10-13 22:46:52,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:46:52,400 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:52,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:52,400 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 22:46:52,401 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 22:46:53,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:46:53,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:53,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:46:53,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:53,785 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 22:46:53,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107986790] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:53,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:53,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-13 22:46:53,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494069208] [2021-10-13 22:46:53,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:46:53,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:53,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:46:53,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:46:53,787 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:53,788 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 1028 transitions, 33784 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 22:46:53,788 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:53,788 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:53,788 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:55,832 INFO L129 PetriNetUnfolder]: 723/5260 cut-off events. [2021-10-13 22:46:55,832 INFO L130 PetriNetUnfolder]: For 122258/122953 co-relation queries the response was YES. [2021-10-13 22:46:55,890 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29324 conditions, 5260 events. 723/5260 cut-off events. For 122258/122953 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 63293 event pairs, 0 based on Foata normal form. 128/4831 useless extension candidates. Maximal degree in co-relation 29132. Up to 926 conditions per place. [2021-10-13 22:46:55,911 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 273 selfloop transitions, 812 changer transitions 17/1148 dead transitions. [2021-10-13 22:46:55,912 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 1148 transitions, 40588 flow [2021-10-13 22:46:55,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-10-13 22:46:55,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-10-13 22:46:55,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2599 transitions. [2021-10-13 22:46:55,914 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8493464052287582 [2021-10-13 22:46:55,914 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2599 transitions. [2021-10-13 22:46:55,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2599 transitions. [2021-10-13 22:46:55,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:55,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2599 transitions. [2021-10-13 22:46:55,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 57.75555555555555) internal successors, (2599), 45 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:55,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 68.0) internal successors, (3128), 46 states have internal predecessors, (3128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:55,918 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 68.0) internal successors, (3128), 46 states have internal predecessors, (3128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:55,918 INFO L186 Difference]: Start difference. First operand has 512 places, 1028 transitions, 33784 flow. Second operand 45 states and 2599 transitions. [2021-10-13 22:46:55,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 1148 transitions, 40588 flow [2021-10-13 22:46:56,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 1148 transitions, 38530 flow, removed 745 selfloop flow, removed 44 redundant places. [2021-10-13 22:46:56,717 INFO L242 Difference]: Finished difference. Result has 519 places, 1106 transitions, 36934 flow [2021-10-13 22:46:56,718 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=31901, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1028, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=740, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=36934, PETRI_PLACES=519, PETRI_TRANSITIONS=1106} [2021-10-13 22:46:56,718 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 451 predicate places. [2021-10-13 22:46:56,718 INFO L470 AbstractCegarLoop]: Abstraction has has 519 places, 1106 transitions, 36934 flow [2021-10-13 22:46:56,718 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 22:46:56,718 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:56,718 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 22:46:56,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-10-13 22:46:56,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-10-13 22:46:56,919 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:56,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:56,919 INFO L82 PathProgramCache]: Analyzing trace with hash -440371838, now seen corresponding path program 9 times [2021-10-13 22:46:56,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:56,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868912315] [2021-10-13 22:46:56,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:56,920 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:56,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:57,019 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 22:46:57,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:57,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868912315] [2021-10-13 22:46:57,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868912315] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:57,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482548500] [2021-10-13 22:46:57,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:46:57,019 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:57,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:57,020 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 22:46:57,021 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 22:46:58,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-13 22:46:58,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:58,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:46:58,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:58,391 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 22:46:58,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482548500] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:58,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:58,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-13 22:46:58,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825445854] [2021-10-13 22:46:58,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:46:58,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:58,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:46:58,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:46:58,393 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:46:58,393 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 1106 transitions, 36934 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 22:46:58,393 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:58,394 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:46:58,394 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:00,682 INFO L129 PetriNetUnfolder]: 773/5604 cut-off events. [2021-10-13 22:47:00,682 INFO L130 PetriNetUnfolder]: For 136998/137854 co-relation queries the response was YES. [2021-10-13 22:47:00,753 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31814 conditions, 5604 events. 773/5604 cut-off events. For 136998/137854 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 68310 event pairs, 0 based on Foata normal form. 180/5191 useless extension candidates. Maximal degree in co-relation 31619. Up to 898 conditions per place. [2021-10-13 22:47:00,775 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 208 selfloop transitions, 952 changer transitions 22/1228 dead transitions. [2021-10-13 22:47:00,776 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 577 places, 1228 transitions, 44270 flow [2021-10-13 22:47:00,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-10-13 22:47:00,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-10-13 22:47:00,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3750 transitions. [2021-10-13 22:47:00,778 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8484162895927602 [2021-10-13 22:47:00,778 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3750 transitions. [2021-10-13 22:47:00,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3750 transitions. [2021-10-13 22:47:00,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:00,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3750 transitions. [2021-10-13 22:47:00,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 57.69230769230769) internal successors, (3750), 65 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:00,783 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 22:47:00,784 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 22:47:00,784 INFO L186 Difference]: Start difference. First operand has 519 places, 1106 transitions, 36934 flow. Second operand 65 states and 3750 transitions. [2021-10-13 22:47:00,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 577 places, 1228 transitions, 44270 flow [2021-10-13 22:47:01,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 1228 transitions, 43352 flow, removed 308 selfloop flow, removed 32 redundant places. [2021-10-13 22:47:01,958 INFO L242 Difference]: Finished difference. Result has 560 places, 1185 transitions, 41495 flow [2021-10-13 22:47:01,959 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=36057, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=878, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=41495, PETRI_PLACES=560, PETRI_TRANSITIONS=1185} [2021-10-13 22:47:01,959 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 492 predicate places. [2021-10-13 22:47:01,959 INFO L470 AbstractCegarLoop]: Abstraction has has 560 places, 1185 transitions, 41495 flow [2021-10-13 22:47:01,959 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 22:47:01,959 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:01,959 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 22:47:01,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-10-13 22:47:02,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:02,160 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:02,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:02,160 INFO L82 PathProgramCache]: Analyzing trace with hash -589187966, now seen corresponding path program 10 times [2021-10-13 22:47:02,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:02,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177851435] [2021-10-13 22:47:02,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:02,161 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:02,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:02,277 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 22:47:02,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:02,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177851435] [2021-10-13 22:47:02,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177851435] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:02,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732531109] [2021-10-13 22:47:02,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:47:02,277 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:02,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:02,278 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 22:47:02,279 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 22:47:03,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:47:03,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:03,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:47:03,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:03,683 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 22:47:03,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732531109] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:03,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:03,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-13 22:47:03,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422532392] [2021-10-13 22:47:03,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:47:03,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:03,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:47:03,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:47:03,684 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:47:03,685 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 1185 transitions, 41495 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 22:47:03,685 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:03,685 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:47:03,685 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:06,361 INFO L129 PetriNetUnfolder]: 847/6163 cut-off events. [2021-10-13 22:47:06,362 INFO L130 PetriNetUnfolder]: For 157719/159021 co-relation queries the response was YES. [2021-10-13 22:47:06,428 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36247 conditions, 6163 events. 847/6163 cut-off events. For 157719/159021 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 76432 event pairs, 0 based on Foata normal form. 186/5696 useless extension candidates. Maximal degree in co-relation 36042. Up to 1006 conditions per place. [2021-10-13 22:47:06,453 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 354 selfloop transitions, 923 changer transitions 17/1340 dead transitions. [2021-10-13 22:47:06,453 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 612 places, 1340 transitions, 50660 flow [2021-10-13 22:47:06,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-10-13 22:47:06,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-10-13 22:47:06,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3518 transitions. [2021-10-13 22:47:06,455 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8481195756991321 [2021-10-13 22:47:06,455 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3518 transitions. [2021-10-13 22:47:06,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3518 transitions. [2021-10-13 22:47:06,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:06,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3518 transitions. [2021-10-13 22:47:06,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 57.67213114754098) internal successors, (3518), 61 states have internal predecessors, (3518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:06,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 68.0) internal successors, (4216), 62 states have internal predecessors, (4216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:06,461 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 68.0) internal successors, (4216), 62 states have internal predecessors, (4216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:06,461 INFO L186 Difference]: Start difference. First operand has 560 places, 1185 transitions, 41495 flow. Second operand 61 states and 3518 transitions. [2021-10-13 22:47:06,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 612 places, 1340 transitions, 50660 flow [2021-10-13 22:47:07,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 569 places, 1340 transitions, 49462 flow, removed 442 selfloop flow, removed 43 redundant places. [2021-10-13 22:47:07,599 INFO L242 Difference]: Finished difference. Result has 582 places, 1301 transitions, 47519 flow [2021-10-13 22:47:07,600 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=40557, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=832, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=47519, PETRI_PLACES=582, PETRI_TRANSITIONS=1301} [2021-10-13 22:47:07,600 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 514 predicate places. [2021-10-13 22:47:07,600 INFO L470 AbstractCegarLoop]: Abstraction has has 582 places, 1301 transitions, 47519 flow [2021-10-13 22:47:07,600 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 22:47:07,601 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:07,601 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 22:47:07,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-10-13 22:47:07,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:07,809 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:07,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:07,809 INFO L82 PathProgramCache]: Analyzing trace with hash 646833412, now seen corresponding path program 11 times [2021-10-13 22:47:07,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:07,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208070121] [2021-10-13 22:47:07,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:07,810 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:07,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:07,900 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 22:47:07,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:07,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208070121] [2021-10-13 22:47:07,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208070121] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:07,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991560178] [2021-10-13 22:47:07,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:47:07,901 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:07,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:07,901 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 22:47:07,902 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 22:47:08,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 22:47:08,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:08,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:47:08,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:09,318 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 22:47:09,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991560178] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:09,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:09,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-13 22:47:09,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979879632] [2021-10-13 22:47:09,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:47:09,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:09,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:47:09,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:47:09,320 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:47:09,320 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 582 places, 1301 transitions, 47519 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 22:47:09,320 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:09,320 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:47:09,321 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:11,848 INFO L129 PetriNetUnfolder]: 890/6451 cut-off events. [2021-10-13 22:47:11,848 INFO L130 PetriNetUnfolder]: For 175684/176982 co-relation queries the response was YES. [2021-10-13 22:47:11,916 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39354 conditions, 6451 events. 890/6451 cut-off events. For 175684/176982 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 80864 event pairs, 0 based on Foata normal form. 168/5936 useless extension candidates. Maximal degree in co-relation 39142. Up to 991 conditions per place. [2021-10-13 22:47:11,941 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 431 selfloop transitions, 917 changer transitions 17/1411 dead transitions. [2021-10-13 22:47:11,942 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 625 places, 1411 transitions, 55320 flow [2021-10-13 22:47:11,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-10-13 22:47:11,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-10-13 22:47:11,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2887 transitions. [2021-10-13 22:47:11,944 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8491176470588235 [2021-10-13 22:47:11,944 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2887 transitions. [2021-10-13 22:47:11,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2887 transitions. [2021-10-13 22:47:11,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:11,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2887 transitions. [2021-10-13 22:47:11,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 57.74) internal successors, (2887), 50 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:11,947 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 22:47:11,948 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 22:47:11,948 INFO L186 Difference]: Start difference. First operand has 582 places, 1301 transitions, 47519 flow. Second operand 50 states and 2887 transitions. [2021-10-13 22:47:11,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 625 places, 1411 transitions, 55320 flow [2021-10-13 22:47:13,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 586 places, 1411 transitions, 54263 flow, removed 377 selfloop flow, removed 39 redundant places. [2021-10-13 22:47:13,345 INFO L242 Difference]: Finished difference. Result has 598 places, 1372 transitions, 52002 flow [2021-10-13 22:47:13,346 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=46554, PETRI_DIFFERENCE_MINUEND_PLACES=537, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=852, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=52002, PETRI_PLACES=598, PETRI_TRANSITIONS=1372} [2021-10-13 22:47:13,346 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 530 predicate places. [2021-10-13 22:47:13,347 INFO L470 AbstractCegarLoop]: Abstraction has has 598 places, 1372 transitions, 52002 flow [2021-10-13 22:47:13,347 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 22:47:13,347 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:13,347 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 22:47:13,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-13 22:47:13,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-10-13 22:47:13,554 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:13,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:13,554 INFO L82 PathProgramCache]: Analyzing trace with hash -78931314, now seen corresponding path program 12 times [2021-10-13 22:47:13,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:13,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177045369] [2021-10-13 22:47:13,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:13,554 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:13,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:13,647 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 22:47:13,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:13,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177045369] [2021-10-13 22:47:13,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177045369] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:13,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625833108] [2021-10-13 22:47:13,647 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:47:13,647 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:13,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:13,648 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 22:47:13,649 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 22:47:14,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 22:47:14,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:14,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:47:14,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:15,123 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 22:47:15,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625833108] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:15,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:15,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-13 22:47:15,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453010632] [2021-10-13 22:47:15,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:47:15,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:15,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:47:15,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:47:15,124 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:47:15,125 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 598 places, 1372 transitions, 52002 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 22:47:15,125 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:15,125 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:47:15,125 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:18,177 INFO L129 PetriNetUnfolder]: 971/7014 cut-off events. [2021-10-13 22:47:18,177 INFO L130 PetriNetUnfolder]: For 208585/210049 co-relation queries the response was YES. [2021-10-13 22:47:18,252 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44098 conditions, 7014 events. 971/7014 cut-off events. For 208585/210049 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 88909 event pairs, 0 based on Foata normal form. 205/6477 useless extension candidates. Maximal degree in co-relation 43881. Up to 1107 conditions per place. [2021-10-13 22:47:18,281 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 343 selfloop transitions, 1126 changer transitions 25/1540 dead transitions. [2021-10-13 22:47:18,281 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 664 places, 1540 transitions, 62437 flow [2021-10-13 22:47:18,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-10-13 22:47:18,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-10-13 22:47:18,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 4212 transitions. [2021-10-13 22:47:18,283 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8485092667203867 [2021-10-13 22:47:18,284 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 4212 transitions. [2021-10-13 22:47:18,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 4212 transitions. [2021-10-13 22:47:18,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:18,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 4212 transitions. [2021-10-13 22:47:18,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 57.6986301369863) internal successors, (4212), 73 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:18,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 68.0) internal successors, (5032), 74 states have internal predecessors, (5032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:18,289 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 68.0) internal successors, (5032), 74 states have internal predecessors, (5032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:18,289 INFO L186 Difference]: Start difference. First operand has 598 places, 1372 transitions, 52002 flow. Second operand 73 states and 4212 transitions. [2021-10-13 22:47:18,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 664 places, 1540 transitions, 62437 flow [2021-10-13 22:47:19,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 628 places, 1540 transitions, 61299 flow, removed 293 selfloop flow, removed 36 redundant places. [2021-10-13 22:47:19,986 INFO L242 Difference]: Finished difference. Result has 645 places, 1488 transitions, 58736 flow [2021-10-13 22:47:19,987 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=50933, PETRI_DIFFERENCE_MINUEND_PLACES=556, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1020, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=58736, PETRI_PLACES=645, PETRI_TRANSITIONS=1488} [2021-10-13 22:47:19,987 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 577 predicate places. [2021-10-13 22:47:19,987 INFO L470 AbstractCegarLoop]: Abstraction has has 645 places, 1488 transitions, 58736 flow [2021-10-13 22:47:19,988 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 22:47:19,988 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:19,988 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 22:47:20,007 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 22:47:20,188 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,SelfDestructingSolverStorable45 [2021-10-13 22:47:20,188 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:20,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:20,189 INFO L82 PathProgramCache]: Analyzing trace with hash -958490634, now seen corresponding path program 13 times [2021-10-13 22:47:20,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:20,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584061016] [2021-10-13 22:47:20,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:20,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:20,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:20,284 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 22:47:20,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:20,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584061016] [2021-10-13 22:47:20,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584061016] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:20,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71077058] [2021-10-13 22:47:20,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:47:20,285 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:20,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:20,286 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 22:47:20,286 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 22:47:21,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:21,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:47:21,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:21,807 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 22:47:21,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71077058] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:21,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:21,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-13 22:47:21,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411286310] [2021-10-13 22:47:21,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:47:21,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:21,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:47:21,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:47:21,808 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:47:21,809 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 645 places, 1488 transitions, 58736 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 22:47:21,809 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:21,809 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:47:21,809 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:25,196 INFO L129 PetriNetUnfolder]: 1030/7447 cut-off events. [2021-10-13 22:47:25,196 INFO L130 PetriNetUnfolder]: For 229387/231131 co-relation queries the response was YES. [2021-10-13 22:47:25,279 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48548 conditions, 7447 events. 1030/7447 cut-off events. For 229387/231131 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 95355 event pairs, 0 based on Foata normal form. 202/6861 useless extension candidates. Maximal degree in co-relation 48321. Up to 1209 conditions per place. [2021-10-13 22:47:25,310 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 435 selfloop transitions, 1140 changer transitions 17/1638 dead transitions. [2021-10-13 22:47:25,310 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 700 places, 1638 transitions, 69354 flow [2021-10-13 22:47:25,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-10-13 22:47:25,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-10-13 22:47:25,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3749 transitions. [2021-10-13 22:47:25,313 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8481900452488688 [2021-10-13 22:47:25,313 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3749 transitions. [2021-10-13 22:47:25,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3749 transitions. [2021-10-13 22:47:25,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:25,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3749 transitions. [2021-10-13 22:47:25,315 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 22:47:25,317 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 22:47:25,318 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 22:47:25,318 INFO L186 Difference]: Start difference. First operand has 645 places, 1488 transitions, 58736 flow. Second operand 65 states and 3749 transitions. [2021-10-13 22:47:25,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 700 places, 1638 transitions, 69354 flow [2021-10-13 22:47:26,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 647 places, 1638 transitions, 67895 flow, removed 469 selfloop flow, removed 53 redundant places. [2021-10-13 22:47:26,950 INFO L242 Difference]: Finished difference. Result has 660 places, 1590 transitions, 65466 flow [2021-10-13 22:47:26,951 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=57497, PETRI_DIFFERENCE_MINUEND_PLACES=583, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1043, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=65466, PETRI_PLACES=660, PETRI_TRANSITIONS=1590} [2021-10-13 22:47:26,951 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 592 predicate places. [2021-10-13 22:47:26,951 INFO L470 AbstractCegarLoop]: Abstraction has has 660 places, 1590 transitions, 65466 flow [2021-10-13 22:47:26,951 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 22:47:26,952 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:26,952 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 22:47:26,973 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 22:47:27,160 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,SelfDestructingSolverStorable46 [2021-10-13 22:47:27,160 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:27,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:27,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1173499918, now seen corresponding path program 14 times [2021-10-13 22:47:27,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:27,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521409076] [2021-10-13 22:47:27,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:27,160 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:27,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:27,279 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 22:47:27,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:27,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521409076] [2021-10-13 22:47:27,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521409076] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:27,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985634847] [2021-10-13 22:47:27,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:47:27,280 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:27,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:27,281 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 22:47:27,282 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 22:47:28,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:47:28,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:28,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:47:28,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:28,766 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 22:47:28,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985634847] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:28,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:28,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-13 22:47:28,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614928319] [2021-10-13 22:47:28,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:47:28,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:28,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:47:28,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:47:28,767 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:47:28,768 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 660 places, 1590 transitions, 65466 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 22:47:28,768 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:28,768 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:47:28,768 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:32,013 INFO L129 PetriNetUnfolder]: 1069/7685 cut-off events. [2021-10-13 22:47:32,013 INFO L130 PetriNetUnfolder]: For 253437/255542 co-relation queries the response was YES. [2021-10-13 22:47:32,103 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51969 conditions, 7685 events. 1069/7685 cut-off events. For 253437/255542 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 99035 event pairs, 0 based on Foata normal form. 220/7092 useless extension candidates. Maximal degree in co-relation 51741. Up to 1273 conditions per place. [2021-10-13 22:47:32,137 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 494 selfloop transitions, 1141 changer transitions 17/1698 dead transitions. [2021-10-13 22:47:32,137 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 712 places, 1698 transitions, 74581 flow [2021-10-13 22:47:32,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-10-13 22:47:32,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-10-13 22:47:32,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3404 transitions. [2021-10-13 22:47:32,139 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8484546360917248 [2021-10-13 22:47:32,139 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3404 transitions. [2021-10-13 22:47:32,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3404 transitions. [2021-10-13 22:47:32,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:32,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3404 transitions. [2021-10-13 22:47:32,142 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 22:47:32,144 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 22:47:32,144 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 22:47:32,144 INFO L186 Difference]: Start difference. First operand has 660 places, 1590 transitions, 65466 flow. Second operand 59 states and 3404 transitions. [2021-10-13 22:47:32,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 712 places, 1698 transitions, 74581 flow [2021-10-13 22:47:34,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 670 places, 1698 transitions, 73398 flow, removed 446 selfloop flow, removed 42 redundant places. [2021-10-13 22:47:34,129 INFO L242 Difference]: Finished difference. Result has 682 places, 1654 transitions, 70815 flow [2021-10-13 22:47:34,131 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=64359, PETRI_DIFFERENCE_MINUEND_PLACES=612, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1083, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=70815, PETRI_PLACES=682, PETRI_TRANSITIONS=1654} [2021-10-13 22:47:34,131 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 614 predicate places. [2021-10-13 22:47:34,131 INFO L470 AbstractCegarLoop]: Abstraction has has 682 places, 1654 transitions, 70815 flow [2021-10-13 22:47:34,131 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 22:47:34,131 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:34,131 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 22:47:34,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-10-13 22:47:34,331 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,SelfDestructingSolverStorable47 [2021-10-13 22:47:34,332 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:34,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:34,332 INFO L82 PathProgramCache]: Analyzing trace with hash -348406825, now seen corresponding path program 21 times [2021-10-13 22:47:34,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:34,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108992844] [2021-10-13 22:47:34,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:34,333 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:34,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:34,445 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 22:47:34,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:34,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108992844] [2021-10-13 22:47:34,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108992844] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:34,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835774772] [2021-10-13 22:47:34,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:47:34,445 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:34,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:34,446 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 22:47:34,447 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 22:47:35,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-13 22:47:35,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:35,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:47:35,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:36,137 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 22:47:36,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835774772] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:36,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:36,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-10-13 22:47:36,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275883118] [2021-10-13 22:47:36,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 22:47:36,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:36,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 22:47:36,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-10-13 22:47:36,139 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:47:36,140 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 682 places, 1654 transitions, 70815 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 22:47:36,140 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:36,140 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:47:36,140 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:38,840 INFO L129 PetriNetUnfolder]: 1062/7668 cut-off events. [2021-10-13 22:47:38,840 INFO L130 PetriNetUnfolder]: For 241576/243711 co-relation queries the response was YES. [2021-10-13 22:47:38,931 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52909 conditions, 7668 events. 1062/7668 cut-off events. For 241576/243711 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 98998 event pairs, 0 based on Foata normal form. 68/6924 useless extension candidates. Maximal degree in co-relation 52674. Up to 1849 conditions per place. [2021-10-13 22:47:38,968 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 1517 selfloop transitions, 117 changer transitions 5/1685 dead transitions. [2021-10-13 22:47:38,968 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 691 places, 1685 transitions, 75561 flow [2021-10-13 22:47:38,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 22:47:38,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-13 22:47:38,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 924 transitions. [2021-10-13 22:47:38,969 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8492647058823529 [2021-10-13 22:47:38,969 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 924 transitions. [2021-10-13 22:47:38,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 924 transitions. [2021-10-13 22:47:38,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:38,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 924 transitions. [2021-10-13 22:47:38,970 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 22:47:38,970 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 22:47:38,971 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 22:47:38,971 INFO L186 Difference]: Start difference. First operand has 682 places, 1654 transitions, 70815 flow. Second operand 16 states and 924 transitions. [2021-10-13 22:47:38,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 691 places, 1685 transitions, 75561 flow [2021-10-13 22:47:41,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 652 places, 1685 transitions, 74547 flow, removed 373 selfloop flow, removed 39 redundant places. [2021-10-13 22:47:41,566 INFO L242 Difference]: Finished difference. Result has 656 places, 1656 transitions, 70226 flow [2021-10-13 22:47:41,568 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=69813, PETRI_DIFFERENCE_MINUEND_PLACES=637, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=70226, PETRI_PLACES=656, PETRI_TRANSITIONS=1656} [2021-10-13 22:47:41,568 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 588 predicate places. [2021-10-13 22:47:41,568 INFO L470 AbstractCegarLoop]: Abstraction has has 656 places, 1656 transitions, 70226 flow [2021-10-13 22:47:41,568 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 22:47:41,568 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:41,568 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 22:47:41,588 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 22:47:41,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:41,773 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:41,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:41,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1135343267, now seen corresponding path program 22 times [2021-10-13 22:47:41,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:41,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871565781] [2021-10-13 22:47:41,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:41,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:41,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:41,879 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 22:47:41,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:41,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871565781] [2021-10-13 22:47:41,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871565781] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:41,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738049804] [2021-10-13 22:47:41,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:47:41,880 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:41,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:41,881 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 22:47:41,881 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 22:47:43,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:47:43,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:43,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:47:43,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:43,508 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 22:47:43,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738049804] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:43,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:43,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-10-13 22:47:43,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049516649] [2021-10-13 22:47:43,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 22:47:43,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:43,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 22:47:43,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-10-13 22:47:43,509 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:47:43,510 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 656 places, 1656 transitions, 70226 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 22:47:43,510 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:43,510 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:47:43,510 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:46,314 INFO L129 PetriNetUnfolder]: 1063/7670 cut-off events. [2021-10-13 22:47:46,315 INFO L130 PetriNetUnfolder]: For 242267/244338 co-relation queries the response was YES. [2021-10-13 22:47:46,403 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52692 conditions, 7670 events. 1063/7670 cut-off events. For 242267/244338 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 98873 event pairs, 0 based on Foata normal form. 68/6927 useless extension candidates. Maximal degree in co-relation 52458. Up to 1819 conditions per place. [2021-10-13 22:47:46,439 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 1484 selfloop transitions, 150 changer transitions 5/1685 dead transitions. [2021-10-13 22:47:46,439 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 670 places, 1685 transitions, 74914 flow [2021-10-13 22:47:46,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 22:47:46,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-13 22:47:46,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 982 transitions. [2021-10-13 22:47:46,440 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8494809688581315 [2021-10-13 22:47:46,440 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 982 transitions. [2021-10-13 22:47:46,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 982 transitions. [2021-10-13 22:47:46,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:46,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 982 transitions. [2021-10-13 22:47:46,441 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 22:47:46,442 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 22:47:46,442 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 22:47:46,442 INFO L186 Difference]: Start difference. First operand has 656 places, 1656 transitions, 70226 flow. Second operand 17 states and 982 transitions. [2021-10-13 22:47:46,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 670 places, 1685 transitions, 74914 flow [2021-10-13 22:47:48,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 657 places, 1685 transitions, 74722 flow, removed 13 selfloop flow, removed 13 redundant places. [2021-10-13 22:47:48,659 INFO L242 Difference]: Finished difference. Result has 661 places, 1658 transitions, 70556 flow [2021-10-13 22:47:48,660 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=70044, PETRI_DIFFERENCE_MINUEND_PLACES=641, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=70556, PETRI_PLACES=661, PETRI_TRANSITIONS=1658} [2021-10-13 22:47:48,660 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 593 predicate places. [2021-10-13 22:47:48,660 INFO L470 AbstractCegarLoop]: Abstraction has has 661 places, 1658 transitions, 70556 flow [2021-10-13 22:47:48,661 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 22:47:48,661 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:48,661 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 22:47:48,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-10-13 22:47:48,861 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,SelfDestructingSolverStorable49 [2021-10-13 22:47:48,861 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:48,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:48,862 INFO L82 PathProgramCache]: Analyzing trace with hash -775862281, now seen corresponding path program 23 times [2021-10-13 22:47:48,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:48,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962705902] [2021-10-13 22:47:48,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:48,862 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:48,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:48,964 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 22:47:48,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:48,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962705902] [2021-10-13 22:47:48,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962705902] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:48,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480460180] [2021-10-13 22:47:48,965 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:47:48,965 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:48,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:48,966 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 22:47:48,966 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 22:47:50,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-13 22:47:50,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:50,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:47:50,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:50,672 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 22:47:50,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480460180] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:50,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:50,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-13 22:47:50,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159960541] [2021-10-13 22:47:50,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:47:50,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:50,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:47:50,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:47:50,674 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:47:50,675 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 661 places, 1658 transitions, 70556 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 22:47:50,675 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:50,675 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:47:50,675 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:54,351 INFO L129 PetriNetUnfolder]: 1107/7996 cut-off events. [2021-10-13 22:47:54,351 INFO L130 PetriNetUnfolder]: For 287033/289158 co-relation queries the response was YES. [2021-10-13 22:47:54,453 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55728 conditions, 7996 events. 1107/7996 cut-off events. For 287033/289158 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 103813 event pairs, 0 based on Foata normal form. 206/7355 useless extension candidates. Maximal degree in co-relation 55492. Up to 1309 conditions per place. [2021-10-13 22:47:54,490 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 526 selfloop transitions, 1157 changer transitions 17/1746 dead transitions. [2021-10-13 22:47:54,490 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 712 places, 1746 transitions, 79631 flow [2021-10-13 22:47:54,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-13 22:47:54,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-10-13 22:47:54,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3117 transitions. [2021-10-13 22:47:54,492 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8488562091503268 [2021-10-13 22:47:54,492 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3117 transitions. [2021-10-13 22:47:54,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3117 transitions. [2021-10-13 22:47:54,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:54,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3117 transitions. [2021-10-13 22:47:54,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 57.72222222222222) internal successors, (3117), 54 states have internal predecessors, (3117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:54,496 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 22:47:54,496 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 22:47:54,496 INFO L186 Difference]: Start difference. First operand has 661 places, 1658 transitions, 70556 flow. Second operand 54 states and 3117 transitions. [2021-10-13 22:47:54,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 712 places, 1746 transitions, 79631 flow [2021-10-13 22:47:56,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 698 places, 1746 transitions, 79331 flow, removed 44 selfloop flow, removed 14 redundant places. [2021-10-13 22:47:56,731 INFO L242 Difference]: Finished difference. Result has 709 places, 1715 transitions, 76670 flow [2021-10-13 22:47:56,732 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=70335, PETRI_DIFFERENCE_MINUEND_PLACES=645, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=76670, PETRI_PLACES=709, PETRI_TRANSITIONS=1715} [2021-10-13 22:47:56,732 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 641 predicate places. [2021-10-13 22:47:56,733 INFO L470 AbstractCegarLoop]: Abstraction has has 709 places, 1715 transitions, 76670 flow [2021-10-13 22:47:56,733 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 22:47:56,733 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:56,733 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 22:47:56,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-10-13 22:47:56,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:56,933 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:56,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:56,934 INFO L82 PathProgramCache]: Analyzing trace with hash -2211849, now seen corresponding path program 15 times [2021-10-13 22:47:56,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:56,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34909071] [2021-10-13 22:47:56,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:56,934 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:56,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:57,053 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 22:47:57,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:57,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34909071] [2021-10-13 22:47:57,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34909071] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:57,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570117673] [2021-10-13 22:47:57,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:47:57,054 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:57,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:57,055 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 22:47:57,057 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 22:47:58,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-13 22:47:58,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:58,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:47:58,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:58,851 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 22:47:58,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570117673] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:58,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:58,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-13 22:47:58,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759838079] [2021-10-13 22:47:58,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:47:58,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:58,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:47:58,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:47:58,853 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:47:58,853 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 709 places, 1715 transitions, 76670 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 22:47:58,853 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:58,853 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:47:58,853 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:02,178 INFO L129 PetriNetUnfolder]: 1124/8195 cut-off events. [2021-10-13 22:48:02,178 INFO L130 PetriNetUnfolder]: For 279979/282077 co-relation queries the response was YES. [2021-10-13 22:48:02,274 INFO L84 FinitePrefix]: Finished finitePrefix Result has 58178 conditions, 8195 events. 1124/8195 cut-off events. For 279979/282077 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 107121 event pairs, 0 based on Foata normal form. 62/7387 useless extension candidates. Maximal degree in co-relation 57933. Up to 1817 conditions per place. [2021-10-13 22:48:02,311 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 1538 selfloop transitions, 265 changer transitions 5/1854 dead transitions. [2021-10-13 22:48:02,311 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 733 places, 1854 transitions, 85988 flow [2021-10-13 22:48:02,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-13 22:48:02,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-13 22:48:02,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1779 transitions. [2021-10-13 22:48:02,312 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8439278937381404 [2021-10-13 22:48:02,312 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1779 transitions. [2021-10-13 22:48:02,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1779 transitions. [2021-10-13 22:48:02,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:02,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1779 transitions. [2021-10-13 22:48:02,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 57.38709677419355) internal successors, (1779), 31 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:02,315 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 22:48:02,315 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 22:48:02,315 INFO L186 Difference]: Start difference. First operand has 709 places, 1715 transitions, 76670 flow. Second operand 31 states and 1779 transitions. [2021-10-13 22:48:02,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 733 places, 1854 transitions, 85988 flow [2021-10-13 22:48:05,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 690 places, 1854 transitions, 84802 flow, removed 341 selfloop flow, removed 43 redundant places. [2021-10-13 22:48:05,161 INFO L242 Difference]: Finished difference. Result has 697 places, 1750 transitions, 78037 flow [2021-10-13 22:48:05,163 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=75546, PETRI_DIFFERENCE_MINUEND_PLACES=660, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=78037, PETRI_PLACES=697, PETRI_TRANSITIONS=1750} [2021-10-13 22:48:05,163 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 629 predicate places. [2021-10-13 22:48:05,163 INFO L470 AbstractCegarLoop]: Abstraction has has 697 places, 1750 transitions, 78037 flow [2021-10-13 22:48:05,163 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 22:48:05,163 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:05,163 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 22:48:05,185 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 22:48:05,383 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,SelfDestructingSolverStorable51 [2021-10-13 22:48:05,383 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:05,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:05,383 INFO L82 PathProgramCache]: Analyzing trace with hash -709267203, now seen corresponding path program 16 times [2021-10-13 22:48:05,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:05,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503728445] [2021-10-13 22:48:05,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:05,384 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:05,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:05,487 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 22:48:05,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:05,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503728445] [2021-10-13 22:48:05,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503728445] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:05,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463160461] [2021-10-13 22:48:05,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:48:05,488 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:05,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:05,488 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 22:48:05,489 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 22:48:06,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:48:06,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:48:06,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:48:06,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:48:07,263 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 22:48:07,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463160461] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:07,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:48:07,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-13 22:48:07,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699046441] [2021-10-13 22:48:07,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:48:07,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:07,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:48:07,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:48:07,264 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:48:07,265 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 697 places, 1750 transitions, 78037 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 22:48:07,265 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:07,265 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:48:07,265 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:10,435 INFO L129 PetriNetUnfolder]: 1125/8204 cut-off events. [2021-10-13 22:48:10,436 INFO L130 PetriNetUnfolder]: For 281711/283726 co-relation queries the response was YES. [2021-10-13 22:48:10,687 INFO L84 FinitePrefix]: Finished finitePrefix Result has 58210 conditions, 8204 events. 1125/8204 cut-off events. For 281711/283726 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 107167 event pairs, 0 based on Foata normal form. 62/7395 useless extension candidates. Maximal degree in co-relation 57964. Up to 1849 conditions per place. [2021-10-13 22:48:10,727 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 1550 selfloop transitions, 237 changer transitions 5/1838 dead transitions. [2021-10-13 22:48:10,727 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 722 places, 1838 transitions, 85086 flow [2021-10-13 22:48:10,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 22:48:10,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-13 22:48:10,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1608 transitions. [2021-10-13 22:48:10,728 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8445378151260504 [2021-10-13 22:48:10,728 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1608 transitions. [2021-10-13 22:48:10,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1608 transitions. [2021-10-13 22:48:10,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:10,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1608 transitions. [2021-10-13 22:48:10,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 57.42857142857143) internal successors, (1608), 28 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:10,730 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 22:48:10,731 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 22:48:10,731 INFO L186 Difference]: Start difference. First operand has 697 places, 1750 transitions, 78037 flow. Second operand 28 states and 1608 transitions. [2021-10-13 22:48:10,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 722 places, 1838 transitions, 85086 flow [2021-10-13 22:48:13,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 701 places, 1838 transitions, 84807 flow, removed 17 selfloop flow, removed 21 redundant places. [2021-10-13 22:48:13,293 INFO L242 Difference]: Finished difference. Result has 706 places, 1753 transitions, 78607 flow [2021-10-13 22:48:13,294 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=77768, PETRI_DIFFERENCE_MINUEND_PLACES=674, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1750, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=78607, PETRI_PLACES=706, PETRI_TRANSITIONS=1753} [2021-10-13 22:48:13,294 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 638 predicate places. [2021-10-13 22:48:13,294 INFO L470 AbstractCegarLoop]: Abstraction has has 706 places, 1753 transitions, 78607 flow [2021-10-13 22:48:13,295 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 22:48:13,295 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:13,295 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 22:48:13,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-10-13 22:48:13,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:13,495 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:13,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:13,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1331168135, now seen corresponding path program 17 times [2021-10-13 22:48:13,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:13,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398135039] [2021-10-13 22:48:13,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:13,496 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:13,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:13,606 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 22:48:13,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:13,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398135039] [2021-10-13 22:48:13,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398135039] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:13,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911947652] [2021-10-13 22:48:13,607 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:48:13,607 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:13,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:13,608 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 22:48:13,608 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 22:48:14,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-13 22:48:14,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:48:14,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:48:14,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:48:15,421 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 22:48:15,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911947652] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:15,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:48:15,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-13 22:48:15,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202899129] [2021-10-13 22:48:15,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:48:15,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:15,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:48:15,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:48:15,423 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:48:15,423 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 706 places, 1753 transitions, 78607 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 22:48:15,423 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:15,423 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:48:15,423 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:18,681 INFO L129 PetriNetUnfolder]: 1126/8213 cut-off events. [2021-10-13 22:48:18,681 INFO L130 PetriNetUnfolder]: For 287136/289156 co-relation queries the response was YES. [2021-10-13 22:48:18,780 INFO L84 FinitePrefix]: Finished finitePrefix Result has 58500 conditions, 8213 events. 1126/8213 cut-off events. For 287136/289156 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 107321 event pairs, 0 based on Foata normal form. 62/7403 useless extension candidates. Maximal degree in co-relation 58250. Up to 1909 conditions per place. [2021-10-13 22:48:18,903 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 1572 selfloop transitions, 182 changer transitions 5/1805 dead transitions. [2021-10-13 22:48:18,904 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 729 places, 1805 transitions, 84252 flow [2021-10-13 22:48:18,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 22:48:18,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-10-13 22:48:18,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1494 transitions. [2021-10-13 22:48:18,905 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8450226244343891 [2021-10-13 22:48:18,905 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1494 transitions. [2021-10-13 22:48:18,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1494 transitions. [2021-10-13 22:48:18,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:18,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1494 transitions. [2021-10-13 22:48:18,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 57.46153846153846) internal successors, (1494), 26 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:18,907 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 22:48:18,907 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 22:48:18,907 INFO L186 Difference]: Start difference. First operand has 706 places, 1753 transitions, 78607 flow. Second operand 26 states and 1494 transitions. [2021-10-13 22:48:18,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 729 places, 1805 transitions, 84252 flow [2021-10-13 22:48:21,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 706 places, 1805 transitions, 83964 flow, removed 9 selfloop flow, removed 23 redundant places. [2021-10-13 22:48:21,658 INFO L242 Difference]: Finished difference. Result has 710 places, 1755 transitions, 78957 flow [2021-10-13 22:48:21,659 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=78329, PETRI_DIFFERENCE_MINUEND_PLACES=681, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1753, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=78957, PETRI_PLACES=710, PETRI_TRANSITIONS=1755} [2021-10-13 22:48:21,659 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 642 predicate places. [2021-10-13 22:48:21,659 INFO L470 AbstractCegarLoop]: Abstraction has has 710 places, 1755 transitions, 78957 flow [2021-10-13 22:48:21,660 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 22:48:21,660 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:21,660 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 22:48:21,680 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-10-13 22:48:21,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:21,860 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:21,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:21,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1234915209, now seen corresponding path program 18 times [2021-10-13 22:48:21,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:21,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888249094] [2021-10-13 22:48:21,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:21,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:21,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:21,957 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 22:48:21,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:21,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888249094] [2021-10-13 22:48:21,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888249094] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:21,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591687704] [2021-10-13 22:48:21,958 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:48:21,958 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:21,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:21,959 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 22:48:21,959 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 22:48:23,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-10-13 22:48:23,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:48:23,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:48:23,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:48:23,835 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 22:48:23,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591687704] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:23,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:48:23,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-13 22:48:23,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735781821] [2021-10-13 22:48:23,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:48:23,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:23,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:48:23,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:48:23,837 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:48:23,837 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 710 places, 1755 transitions, 78957 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 22:48:23,837 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:23,837 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:48:23,837 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:27,148 INFO L129 PetriNetUnfolder]: 1129/8240 cut-off events. [2021-10-13 22:48:27,149 INFO L130 PetriNetUnfolder]: For 291726/293751 co-relation queries the response was YES. [2021-10-13 22:48:27,254 INFO L84 FinitePrefix]: Finished finitePrefix Result has 58788 conditions, 8240 events. 1129/8240 cut-off events. For 291726/293751 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 107866 event pairs, 0 based on Foata normal form. 62/7427 useless extension candidates. Maximal degree in co-relation 58536. Up to 1759 conditions per place. [2021-10-13 22:48:27,294 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 1477 selfloop transitions, 334 changer transitions 5/1862 dead transitions. [2021-10-13 22:48:27,295 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 739 places, 1862 transitions, 86761 flow [2021-10-13 22:48:27,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 22:48:27,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-10-13 22:48:27,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1837 transitions. [2021-10-13 22:48:27,296 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8442095588235294 [2021-10-13 22:48:27,296 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1837 transitions. [2021-10-13 22:48:27,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1837 transitions. [2021-10-13 22:48:27,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:27,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1837 transitions. [2021-10-13 22:48:27,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 57.40625) internal successors, (1837), 32 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:27,299 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 22:48:27,299 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 22:48:27,299 INFO L186 Difference]: Start difference. First operand has 710 places, 1755 transitions, 78957 flow. Second operand 32 states and 1837 transitions. [2021-10-13 22:48:27,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 739 places, 1862 transitions, 86761 flow [2021-10-13 22:48:29,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 718 places, 1862 transitions, 86514 flow, removed 12 selfloop flow, removed 21 redundant places. [2021-10-13 22:48:29,988 INFO L242 Difference]: Finished difference. Result has 722 places, 1759 transitions, 79831 flow [2021-10-13 22:48:29,990 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=78720, PETRI_DIFFERENCE_MINUEND_PLACES=687, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1755, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=330, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=79831, PETRI_PLACES=722, PETRI_TRANSITIONS=1759} [2021-10-13 22:48:29,990 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 654 predicate places. [2021-10-13 22:48:29,990 INFO L470 AbstractCegarLoop]: Abstraction has has 722 places, 1759 transitions, 79831 flow [2021-10-13 22:48:29,990 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 22:48:29,990 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:29,991 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 22:48:30,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-10-13 22:48:30,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-10-13 22:48:30,191 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:30,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:30,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1159631867, now seen corresponding path program 19 times [2021-10-13 22:48:30,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:30,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635369306] [2021-10-13 22:48:30,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:30,192 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:30,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:30,357 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 22:48:30,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:30,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635369306] [2021-10-13 22:48:30,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635369306] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:30,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002979877] [2021-10-13 22:48:30,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:48:30,358 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:30,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:30,358 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 22:48:30,359 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 22:48:31,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:31,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:48:31,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:48:32,314 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 22:48:32,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002979877] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:32,314 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:48:32,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-13 22:48:32,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576577507] [2021-10-13 22:48:32,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:48:32,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:32,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:48:32,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:48:32,316 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:48:32,316 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 722 places, 1759 transitions, 79831 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 22:48:32,316 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:32,316 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:48:32,316 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:35,597 INFO L129 PetriNetUnfolder]: 1130/8249 cut-off events. [2021-10-13 22:48:35,597 INFO L130 PetriNetUnfolder]: For 300657/302687 co-relation queries the response was YES. [2021-10-13 22:48:35,701 INFO L84 FinitePrefix]: Finished finitePrefix Result has 59261 conditions, 8249 events. 1130/8249 cut-off events. For 300657/302687 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 107943 event pairs, 0 based on Foata normal form. 62/7435 useless extension candidates. Maximal degree in co-relation 59007. Up to 1793 conditions per place. [2021-10-13 22:48:35,741 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 1491 selfloop transitions, 304 changer transitions 5/1846 dead transitions. [2021-10-13 22:48:35,741 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 748 places, 1846 transitions, 86910 flow [2021-10-13 22:48:35,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 22:48:35,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-10-13 22:48:35,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1666 transitions. [2021-10-13 22:48:35,743 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8448275862068966 [2021-10-13 22:48:35,743 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1666 transitions. [2021-10-13 22:48:35,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1666 transitions. [2021-10-13 22:48:35,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:35,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1666 transitions. [2021-10-13 22:48:35,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 57.44827586206897) internal successors, (1666), 29 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:35,745 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 22:48:35,745 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 22:48:35,745 INFO L186 Difference]: Start difference. First operand has 722 places, 1759 transitions, 79831 flow. Second operand 29 states and 1666 transitions. [2021-10-13 22:48:35,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 748 places, 1846 transitions, 86910 flow [2021-10-13 22:48:38,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 719 places, 1846 transitions, 86500 flow, removed 10 selfloop flow, removed 29 redundant places. [2021-10-13 22:48:38,906 INFO L242 Difference]: Finished difference. Result has 724 places, 1762 transitions, 80486 flow [2021-10-13 22:48:38,908 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=79431, PETRI_DIFFERENCE_MINUEND_PLACES=691, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1759, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=301, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=80486, PETRI_PLACES=724, PETRI_TRANSITIONS=1762} [2021-10-13 22:48:38,908 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 656 predicate places. [2021-10-13 22:48:38,908 INFO L470 AbstractCegarLoop]: Abstraction has has 724 places, 1762 transitions, 80486 flow [2021-10-13 22:48:38,908 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 22:48:38,908 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:38,908 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 22:48:38,929 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 22:48:39,108 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,SelfDestructingSolverStorable55 [2021-10-13 22:48:39,109 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:39,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:39,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1453649271, now seen corresponding path program 20 times [2021-10-13 22:48:39,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:39,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990276142] [2021-10-13 22:48:39,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:39,110 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:39,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:39,214 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 22:48:39,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:39,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990276142] [2021-10-13 22:48:39,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990276142] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:39,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61482910] [2021-10-13 22:48:39,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:48:39,214 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:39,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:39,215 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 22:48:39,216 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 22:48:40,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:48:40,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:48:40,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:48:40,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:48:41,134 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 22:48:41,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61482910] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:41,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:48:41,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-13 22:48:41,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210764078] [2021-10-13 22:48:41,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:48:41,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:41,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:48:41,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:48:41,135 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:48:41,136 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 724 places, 1762 transitions, 80486 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 22:48:41,136 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:41,136 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:48:41,136 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:44,492 INFO L129 PetriNetUnfolder]: 1131/8251 cut-off events. [2021-10-13 22:48:44,492 INFO L130 PetriNetUnfolder]: For 308620/310639 co-relation queries the response was YES. [2021-10-13 22:48:44,601 INFO L84 FinitePrefix]: Finished finitePrefix Result has 59602 conditions, 8251 events. 1131/8251 cut-off events. For 308620/310639 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 108067 event pairs, 0 based on Foata normal form. 62/7438 useless extension candidates. Maximal degree in co-relation 59345. Up to 1869 conditions per place. [2021-10-13 22:48:44,643 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 1529 selfloop transitions, 233 changer transitions 5/1813 dead transitions. [2021-10-13 22:48:44,643 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 748 places, 1813 transitions, 86155 flow [2021-10-13 22:48:44,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-13 22:48:44,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-10-13 22:48:44,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1552 transitions. [2021-10-13 22:48:44,644 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8453159041394336 [2021-10-13 22:48:44,644 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1552 transitions. [2021-10-13 22:48:44,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1552 transitions. [2021-10-13 22:48:44,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:44,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1552 transitions. [2021-10-13 22:48:44,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 57.48148148148148) internal successors, (1552), 27 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:44,646 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 22:48:44,646 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 22:48:44,646 INFO L186 Difference]: Start difference. First operand has 724 places, 1762 transitions, 80486 flow. Second operand 27 states and 1552 transitions. [2021-10-13 22:48:44,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 748 places, 1813 transitions, 86155 flow [2021-10-13 22:48:47,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 724 places, 1813 transitions, 85801 flow, removed 11 selfloop flow, removed 24 redundant places. [2021-10-13 22:48:48,049 INFO L242 Difference]: Finished difference. Result has 728 places, 1764 transitions, 80932 flow [2021-10-13 22:48:48,050 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=80142, PETRI_DIFFERENCE_MINUEND_PLACES=698, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1762, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=80932, PETRI_PLACES=728, PETRI_TRANSITIONS=1764} [2021-10-13 22:48:48,051 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 660 predicate places. [2021-10-13 22:48:48,051 INFO L470 AbstractCegarLoop]: Abstraction has has 728 places, 1764 transitions, 80932 flow [2021-10-13 22:48:48,051 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 22:48:48,051 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:48,051 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 22:48:48,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-10-13 22:48:48,252 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,SelfDestructingSolverStorable56 [2021-10-13 22:48:48,253 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:48,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:48,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1555772353, now seen corresponding path program 21 times [2021-10-13 22:48:48,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:48,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837519953] [2021-10-13 22:48:48,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:48,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:48,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:48,355 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 22:48:48,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:48,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837519953] [2021-10-13 22:48:48,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837519953] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:48,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628238983] [2021-10-13 22:48:48,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:48:48,356 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:48,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:48,357 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 22:48:48,357 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 22:48:49,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-13 22:48:49,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:48:49,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:48:49,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:48:50,343 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 22:48:50,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628238983] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:50,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:48:50,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-13 22:48:50,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524245036] [2021-10-13 22:48:50,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:48:50,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:50,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:48:50,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:48:50,345 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:48:50,345 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 728 places, 1764 transitions, 80932 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 22:48:50,345 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:50,345 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:48:50,345 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:54,951 INFO L129 PetriNetUnfolder]: 1176/8556 cut-off events. [2021-10-13 22:48:54,952 INFO L130 PetriNetUnfolder]: For 363322/365526 co-relation queries the response was YES. [2021-10-13 22:48:55,059 INFO L84 FinitePrefix]: Finished finitePrefix Result has 62768 conditions, 8556 events. 1176/8556 cut-off events. For 363322/365526 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 112831 event pairs, 0 based on Foata normal form. 274/7923 useless extension candidates. Maximal degree in co-relation 62509. Up to 1429 conditions per place. [2021-10-13 22:48:55,102 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 300 selfloop transitions, 1500 changer transitions 17/1863 dead transitions. [2021-10-13 22:48:55,102 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 788 places, 1863 transitions, 90844 flow [2021-10-13 22:48:55,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-10-13 22:48:55,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-10-13 22:48:55,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3634 transitions. [2021-10-13 22:48:55,104 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8482726423902894 [2021-10-13 22:48:55,104 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3634 transitions. [2021-10-13 22:48:55,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3634 transitions. [2021-10-13 22:48:55,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:55,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3634 transitions. [2021-10-13 22:48:55,107 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 22:48:55,109 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 22:48:55,109 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 22:48:55,109 INFO L186 Difference]: Start difference. First operand has 728 places, 1764 transitions, 80932 flow. Second operand 63 states and 3634 transitions. [2021-10-13 22:48:55,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 788 places, 1863 transitions, 90844 flow [2021-10-13 22:48:58,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 766 places, 1863 transitions, 90527 flow, removed 24 selfloop flow, removed 22 redundant places. [2021-10-13 22:48:58,508 INFO L242 Difference]: Finished difference. Result has 778 places, 1820 transitions, 88220 flow [2021-10-13 22:48:58,510 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=80651, PETRI_DIFFERENCE_MINUEND_PLACES=704, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1764, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1451, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=88220, PETRI_PLACES=778, PETRI_TRANSITIONS=1820} [2021-10-13 22:48:58,510 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 710 predicate places. [2021-10-13 22:48:58,510 INFO L470 AbstractCegarLoop]: Abstraction has has 778 places, 1820 transitions, 88220 flow [2021-10-13 22:48:58,510 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 22:48:58,510 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:58,510 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 22:48:58,532 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 22:48:58,711 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,SelfDestructingSolverStorable57 [2021-10-13 22:48:58,711 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:58,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:58,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1293981077, now seen corresponding path program 22 times [2021-10-13 22:48:58,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:58,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197854740] [2021-10-13 22:48:58,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:58,712 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:58,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:58,829 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 22:48:58,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:58,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197854740] [2021-10-13 22:48:58,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197854740] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:58,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005466252] [2021-10-13 22:48:58,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:48:58,830 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:58,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:58,831 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 22:48:58,831 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 22:49:00,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:49:00,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:00,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:49:00,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:00,790 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 22:49:00,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005466252] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:00,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:00,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-13 22:49:00,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66699694] [2021-10-13 22:49:00,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:49:00,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:00,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:49:00,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:49:00,792 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:49:00,792 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 778 places, 1820 transitions, 88220 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 22:49:00,792 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:00,792 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:49:00,793 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:05,307 INFO L129 PetriNetUnfolder]: 1220/8890 cut-off events. [2021-10-13 22:49:05,308 INFO L130 PetriNetUnfolder]: For 405002/407259 co-relation queries the response was YES. [2021-10-13 22:49:05,436 INFO L84 FinitePrefix]: Finished finitePrefix Result has 67730 conditions, 8890 events. 1220/8890 cut-off events. For 405002/407259 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 117961 event pairs, 0 based on Foata normal form. 250/8197 useless extension candidates. Maximal degree in co-relation 67461. Up to 1493 conditions per place. [2021-10-13 22:49:05,604 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 434 selfloop transitions, 1430 changer transitions 17/1927 dead transitions. [2021-10-13 22:49:05,605 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 832 places, 1927 transitions, 98660 flow [2021-10-13 22:49:05,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-10-13 22:49:05,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-10-13 22:49:05,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3518 transitions. [2021-10-13 22:49:05,607 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8481195756991321 [2021-10-13 22:49:05,607 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3518 transitions. [2021-10-13 22:49:05,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3518 transitions. [2021-10-13 22:49:05,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:05,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3518 transitions. [2021-10-13 22:49:05,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 57.67213114754098) internal successors, (3518), 61 states have internal predecessors, (3518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:05,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 68.0) internal successors, (4216), 62 states have internal predecessors, (4216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:05,612 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 68.0) internal successors, (4216), 62 states have internal predecessors, (4216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:05,612 INFO L186 Difference]: Start difference. First operand has 778 places, 1820 transitions, 88220 flow. Second operand 61 states and 3518 transitions. [2021-10-13 22:49:05,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 832 places, 1927 transitions, 98660 flow [2021-10-13 22:49:09,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 790 places, 1927 transitions, 95982 flow, removed 1146 selfloop flow, removed 42 redundant places. [2021-10-13 22:49:09,671 INFO L242 Difference]: Finished difference. Result has 802 places, 1892 transitions, 93437 flow [2021-10-13 22:49:09,672 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=85626, PETRI_DIFFERENCE_MINUEND_PLACES=730, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1820, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1366, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=93437, PETRI_PLACES=802, PETRI_TRANSITIONS=1892} [2021-10-13 22:49:09,672 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 734 predicate places. [2021-10-13 22:49:09,672 INFO L470 AbstractCegarLoop]: Abstraction has has 802 places, 1892 transitions, 93437 flow [2021-10-13 22:49:09,672 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 22:49:09,672 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:09,672 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 22:49:09,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-10-13 22:49:09,873 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,SelfDestructingSolverStorable58 [2021-10-13 22:49:09,873 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:09,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:09,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1110083055, now seen corresponding path program 23 times [2021-10-13 22:49:09,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:09,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048474375] [2021-10-13 22:49:09,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:09,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:09,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:09,984 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 22:49:09,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:09,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048474375] [2021-10-13 22:49:09,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048474375] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:09,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348792195] [2021-10-13 22:49:09,985 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:49:09,985 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:09,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:09,986 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 22:49:09,987 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 22:49:11,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-13 22:49:11,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:11,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:49:11,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:12,200 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 22:49:12,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348792195] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:12,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:12,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-13 22:49:12,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770919713] [2021-10-13 22:49:12,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:49:12,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:12,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:49:12,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:49:12,201 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:49:12,202 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 802 places, 1892 transitions, 93437 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 22:49:12,202 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:12,202 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:49:12,202 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:16,833 INFO L129 PetriNetUnfolder]: 1249/9112 cut-off events. [2021-10-13 22:49:16,833 INFO L130 PetriNetUnfolder]: For 432062/434070 co-relation queries the response was YES. [2021-10-13 22:49:16,960 INFO L84 FinitePrefix]: Finished finitePrefix Result has 70784 conditions, 9112 events. 1249/9112 cut-off events. For 432062/434070 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 121565 event pairs, 0 based on Foata normal form. 240/8385 useless extension candidates. Maximal degree in co-relation 70508. Up to 1452 conditions per place. [2021-10-13 22:49:17,008 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 488 selfloop transitions, 1424 changer transitions 17/1975 dead transitions. [2021-10-13 22:49:17,009 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 854 places, 1975 transitions, 103215 flow [2021-10-13 22:49:17,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-10-13 22:49:17,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-10-13 22:49:17,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3404 transitions. [2021-10-13 22:49:17,011 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8484546360917248 [2021-10-13 22:49:17,011 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3404 transitions. [2021-10-13 22:49:17,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3404 transitions. [2021-10-13 22:49:17,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:17,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3404 transitions. [2021-10-13 22:49:17,013 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 22:49:17,015 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 22:49:17,015 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 22:49:17,016 INFO L186 Difference]: Start difference. First operand has 802 places, 1892 transitions, 93437 flow. Second operand 59 states and 3404 transitions. [2021-10-13 22:49:17,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 854 places, 1975 transitions, 103215 flow [2021-10-13 22:49:21,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 810 places, 1975 transitions, 101128 flow, removed 701 selfloop flow, removed 44 redundant places. [2021-10-13 22:49:21,244 INFO L242 Difference]: Finished difference. Result has 822 places, 1938 transitions, 98401 flow [2021-10-13 22:49:21,246 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=91528, PETRI_DIFFERENCE_MINUEND_PLACES=752, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1892, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1383, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=98401, PETRI_PLACES=822, PETRI_TRANSITIONS=1938} [2021-10-13 22:49:21,246 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 754 predicate places. [2021-10-13 22:49:21,246 INFO L470 AbstractCegarLoop]: Abstraction has has 822 places, 1938 transitions, 98401 flow [2021-10-13 22:49:21,246 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 22:49:21,246 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:21,246 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 22:49:21,271 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 22:49:21,448 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,SelfDestructingSolverStorable59 [2021-10-13 22:49:21,449 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:21,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:21,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1455098487, now seen corresponding path program 24 times [2021-10-13 22:49:21,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:21,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009138247] [2021-10-13 22:49:21,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:21,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:21,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:21,553 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 22:49:21,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:21,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009138247] [2021-10-13 22:49:21,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009138247] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:21,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775802007] [2021-10-13 22:49:21,554 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:49:21,554 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:21,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:21,555 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 22:49:21,555 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 22:49:23,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-13 22:49:23,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:23,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:49:23,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:23,558 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 22:49:23,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775802007] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:23,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:23,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-13 22:49:23,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243201875] [2021-10-13 22:49:23,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:49:23,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:23,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:49:23,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:49:23,559 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:49:23,560 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 822 places, 1938 transitions, 98401 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 22:49:23,560 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:23,560 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:49:23,560 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:28,230 INFO L129 PetriNetUnfolder]: 1266/9228 cut-off events. [2021-10-13 22:49:28,231 INFO L130 PetriNetUnfolder]: For 457732/459687 co-relation queries the response was YES. [2021-10-13 22:49:28,454 INFO L84 FinitePrefix]: Finished finitePrefix Result has 73597 conditions, 9228 events. 1266/9228 cut-off events. For 457732/459687 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 123276 event pairs, 0 based on Foata normal form. 184/8433 useless extension candidates. Maximal degree in co-relation 73314. Up to 1478 conditions per place. [2021-10-13 22:49:28,503 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 823 selfloop transitions, 1128 changer transitions 17/2014 dead transitions. [2021-10-13 22:49:28,503 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 864 places, 2014 transitions, 107729 flow [2021-10-13 22:49:28,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-10-13 22:49:28,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-10-13 22:49:28,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2829 transitions. [2021-10-13 22:49:28,505 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8490396158463386 [2021-10-13 22:49:28,505 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2829 transitions. [2021-10-13 22:49:28,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2829 transitions. [2021-10-13 22:49:28,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:28,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2829 transitions. [2021-10-13 22:49:28,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 57.734693877551024) internal successors, (2829), 49 states have internal predecessors, (2829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:28,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 68.0) internal successors, (3400), 50 states have internal predecessors, (3400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:28,509 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 68.0) internal successors, (3400), 50 states have internal predecessors, (3400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:28,509 INFO L186 Difference]: Start difference. First operand has 822 places, 1938 transitions, 98401 flow. Second operand 49 states and 2829 transitions. [2021-10-13 22:49:28,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 864 places, 2014 transitions, 107729 flow [2021-10-13 22:49:32,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 821 places, 2014 transitions, 106193 flow, removed 493 selfloop flow, removed 43 redundant places. [2021-10-13 22:49:32,772 INFO L242 Difference]: Finished difference. Result has 832 places, 1964 transitions, 102018 flow [2021-10-13 22:49:32,773 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=96909, PETRI_DIFFERENCE_MINUEND_PLACES=773, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1938, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=830, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=102018, PETRI_PLACES=832, PETRI_TRANSITIONS=1964} [2021-10-13 22:49:32,773 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 764 predicate places. [2021-10-13 22:49:32,773 INFO L470 AbstractCegarLoop]: Abstraction has has 832 places, 1964 transitions, 102018 flow [2021-10-13 22:49:32,774 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 22:49:32,774 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:32,774 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 22:49:32,796 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 22:49:32,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:32,974 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:32,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:32,974 INFO L82 PathProgramCache]: Analyzing trace with hash 600130805, now seen corresponding path program 25 times [2021-10-13 22:49:32,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:32,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242593873] [2021-10-13 22:49:32,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:32,975 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:32,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:33,089 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 22:49:33,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:33,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242593873] [2021-10-13 22:49:33,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242593873] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:33,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520590253] [2021-10-13 22:49:33,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:49:33,089 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:33,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:33,090 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 22:49:33,091 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 22:49:34,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:34,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:49:34,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:35,131 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 22:49:35,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520590253] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:35,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:35,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-13 22:49:35,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015242215] [2021-10-13 22:49:35,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:49:35,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:35,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:49:35,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:49:35,133 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:49:35,133 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 832 places, 1964 transitions, 102018 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 22:49:35,133 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:35,133 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:49:35,133 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:40,814 INFO L129 PetriNetUnfolder]: 1381/10094 cut-off events. [2021-10-13 22:49:40,814 INFO L130 PetriNetUnfolder]: For 506504/508844 co-relation queries the response was YES. [2021-10-13 22:49:40,969 INFO L84 FinitePrefix]: Finished finitePrefix Result has 81580 conditions, 10094 events. 1381/10094 cut-off events. For 506504/508844 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 136304 event pairs, 0 based on Foata normal form. 298/9320 useless extension candidates. Maximal degree in co-relation 81292. Up to 1655 conditions per place. [2021-10-13 22:49:41,024 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 376 selfloop transitions, 1745 changer transitions 17/2184 dead transitions. [2021-10-13 22:49:41,024 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 908 places, 2184 transitions, 119171 flow [2021-10-13 22:49:41,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-10-13 22:49:41,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-10-13 22:49:41,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 4783 transitions. [2021-10-13 22:49:41,027 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8474486180014175 [2021-10-13 22:49:41,027 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 4783 transitions. [2021-10-13 22:49:41,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 4783 transitions. [2021-10-13 22:49:41,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:41,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 4783 transitions. [2021-10-13 22:49:41,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 57.626506024096386) internal successors, (4783), 83 states have internal predecessors, (4783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:41,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 68.0) internal successors, (5712), 84 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:41,033 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 68.0) internal successors, (5712), 84 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:41,033 INFO L186 Difference]: Start difference. First operand has 832 places, 1964 transitions, 102018 flow. Second operand 83 states and 4783 transitions. [2021-10-13 22:49:41,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 908 places, 2184 transitions, 119171 flow [2021-10-13 22:49:46,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 872 places, 2184 transitions, 118015 flow, removed 384 selfloop flow, removed 36 redundant places. [2021-10-13 22:49:46,322 INFO L242 Difference]: Finished difference. Result has 884 places, 2144 transitions, 115490 flow [2021-10-13 22:49:46,323 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=100926, PETRI_DIFFERENCE_MINUEND_PLACES=790, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1964, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1580, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=115490, PETRI_PLACES=884, PETRI_TRANSITIONS=2144} [2021-10-13 22:49:46,323 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 816 predicate places. [2021-10-13 22:49:46,323 INFO L470 AbstractCegarLoop]: Abstraction has has 884 places, 2144 transitions, 115490 flow [2021-10-13 22:49:46,324 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 22:49:46,324 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:46,324 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 22:49:46,348 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 22:49:46,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:46,539 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:46,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:46,540 INFO L82 PathProgramCache]: Analyzing trace with hash 748946933, now seen corresponding path program 26 times [2021-10-13 22:49:46,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:46,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119387429] [2021-10-13 22:49:46,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:46,540 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:46,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:46,650 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 22:49:46,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:46,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119387429] [2021-10-13 22:49:46,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119387429] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:46,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550766534] [2021-10-13 22:49:46,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:49:46,651 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:46,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:46,652 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 22:49:46,653 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 22:49:48,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:49:48,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:48,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:49:48,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:48,757 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 22:49:48,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550766534] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:48,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:48,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-13 22:49:48,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751001935] [2021-10-13 22:49:48,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:49:48,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:48,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:49:48,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:49:48,759 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:49:48,759 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 884 places, 2144 transitions, 115490 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 22:49:48,760 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:48,760 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:49:48,760 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:54,751 INFO L129 PetriNetUnfolder]: 1425/10408 cut-off events. [2021-10-13 22:49:54,751 INFO L130 PetriNetUnfolder]: For 550027/552560 co-relation queries the response was YES. [2021-10-13 22:49:54,919 INFO L84 FinitePrefix]: Finished finitePrefix Result has 86936 conditions, 10408 events. 1425/10408 cut-off events. For 550027/552560 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 141427 event pairs, 0 based on Foata normal form. 274/9577 useless extension candidates. Maximal degree in co-relation 86641. Up to 1716 conditions per place. [2021-10-13 22:49:54,980 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 577 selfloop transitions, 1628 changer transitions 17/2268 dead transitions. [2021-10-13 22:49:54,980 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 942 places, 2268 transitions, 127946 flow [2021-10-13 22:49:54,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-10-13 22:49:54,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-10-13 22:49:54,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3749 transitions. [2021-10-13 22:49:54,982 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8481900452488688 [2021-10-13 22:49:54,982 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3749 transitions. [2021-10-13 22:49:54,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3749 transitions. [2021-10-13 22:49:54,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:54,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3749 transitions. [2021-10-13 22:49:54,985 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 22:49:54,987 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 22:49:54,987 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 22:49:54,988 INFO L186 Difference]: Start difference. First operand has 884 places, 2144 transitions, 115490 flow. Second operand 65 states and 3749 transitions. [2021-10-13 22:49:54,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 942 places, 2268 transitions, 127946 flow [2021-10-13 22:50:00,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 886 places, 2268 transitions, 124973 flow, removed 1102 selfloop flow, removed 56 redundant places. [2021-10-13 22:50:00,554 INFO L242 Difference]: Finished difference. Result has 898 places, 2216 transitions, 121552 flow [2021-10-13 22:50:00,556 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=112675, PETRI_DIFFERENCE_MINUEND_PLACES=822, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1563, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=121552, PETRI_PLACES=898, PETRI_TRANSITIONS=2216} [2021-10-13 22:50:00,556 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 830 predicate places. [2021-10-13 22:50:00,556 INFO L470 AbstractCegarLoop]: Abstraction has has 898 places, 2216 transitions, 121552 flow [2021-10-13 22:50:00,556 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 22:50:00,556 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:50:00,556 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 22:50:00,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-10-13 22:50:00,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:00,779 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:50:00,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:50:00,780 INFO L82 PathProgramCache]: Analyzing trace with hash -783724425, now seen corresponding path program 27 times [2021-10-13 22:50:00,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:50:00,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802222539] [2021-10-13 22:50:00,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:50:00,780 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:50:00,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:50:00,912 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 22:50:00,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:50:00,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802222539] [2021-10-13 22:50:00,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802222539] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:00,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642329472] [2021-10-13 22:50:00,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:50:00,912 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:00,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:50:00,913 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:50:00,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-10-13 22:50:02,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-13 22:50:02,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:50:02,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:50:02,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:50:03,036 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 22:50:03,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642329472] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:03,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:50:03,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-13 22:50:03,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66919141] [2021-10-13 22:50:03,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:50:03,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:50:03,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:50:03,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:50:03,037 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:50:03,038 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 898 places, 2216 transitions, 121552 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 22:50:03,038 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:50:03,038 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:50:03,038 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:50:09,590 INFO L129 PetriNetUnfolder]: 1471/10696 cut-off events. [2021-10-13 22:50:09,591 INFO L130 PetriNetUnfolder]: For 582544/585380 co-relation queries the response was YES. [2021-10-13 22:50:09,754 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91048 conditions, 10696 events. 1471/10696 cut-off events. For 582544/585380 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 146128 event pairs, 0 based on Foata normal form. 326/9888 useless extension candidates. Maximal degree in co-relation 90749. Up to 1726 conditions per place. [2021-10-13 22:50:09,816 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 601 selfloop transitions, 1669 changer transitions 17/2333 dead transitions. [2021-10-13 22:50:09,816 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 963 places, 2333 transitions, 134192 flow [2021-10-13 22:50:09,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-10-13 22:50:09,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-10-13 22:50:09,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 4151 transitions. [2021-10-13 22:50:09,819 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8478349673202614 [2021-10-13 22:50:09,819 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 4151 transitions. [2021-10-13 22:50:09,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 4151 transitions. [2021-10-13 22:50:09,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:50:09,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 4151 transitions. [2021-10-13 22:50:09,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 57.65277777777778) internal successors, (4151), 72 states have internal predecessors, (4151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:09,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 68.0) internal successors, (4964), 73 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:09,825 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 68.0) internal successors, (4964), 73 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:09,825 INFO L186 Difference]: Start difference. First operand has 898 places, 2216 transitions, 121552 flow. Second operand 72 states and 4151 transitions. [2021-10-13 22:50:09,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 963 places, 2333 transitions, 134192 flow [2021-10-13 22:50:15,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 916 places, 2333 transitions, 132907 flow, removed 364 selfloop flow, removed 47 redundant places. [2021-10-13 22:50:15,822 INFO L242 Difference]: Finished difference. Result has 928 places, 2291 transitions, 129754 flow [2021-10-13 22:50:15,824 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=120329, PETRI_DIFFERENCE_MINUEND_PLACES=845, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1601, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=129754, PETRI_PLACES=928, PETRI_TRANSITIONS=2291} [2021-10-13 22:50:15,824 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 860 predicate places. [2021-10-13 22:50:15,824 INFO L470 AbstractCegarLoop]: Abstraction has has 928 places, 2291 transitions, 129754 flow [2021-10-13 22:50:15,824 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 22:50:15,824 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:50:15,824 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 22:50:15,847 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 22:50:16,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:16,039 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:50:16,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:50:16,040 INFO L82 PathProgramCache]: Analyzing trace with hash -883146935, now seen corresponding path program 28 times [2021-10-13 22:50:16,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:50:16,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076762012] [2021-10-13 22:50:16,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:50:16,040 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:50:16,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:50:16,223 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 22:50:16,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:50:16,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076762012] [2021-10-13 22:50:16,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076762012] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:16,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273817029] [2021-10-13 22:50:16,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:50:16,224 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:16,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:50:16,225 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 22:50:16,225 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 22:50:17,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:50:17,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:50:17,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:50:17,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:50:18,453 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 22:50:18,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273817029] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:18,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:50:18,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-13 22:50:18,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569300593] [2021-10-13 22:50:18,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:50:18,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:50:18,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:50:18,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:50:18,455 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:50:18,455 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 928 places, 2291 transitions, 129754 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 22:50:18,455 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:50:18,455 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:50:18,456 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:50:24,904 INFO L129 PetriNetUnfolder]: 1502/10893 cut-off events. [2021-10-13 22:50:24,905 INFO L130 PetriNetUnfolder]: For 630393/633543 co-relation queries the response was YES. [2021-10-13 22:50:25,159 INFO L84 FinitePrefix]: Finished finitePrefix Result has 95580 conditions, 10893 events. 1502/10893 cut-off events. For 630393/633543 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 149553 event pairs, 0 based on Foata normal form. 318/10057 useless extension candidates. Maximal degree in co-relation 95275. Up to 1765 conditions per place. [2021-10-13 22:50:25,221 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 573 selfloop transitions, 1758 changer transitions 17/2394 dead transitions. [2021-10-13 22:50:25,221 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 986 places, 2394 transitions, 141960 flow [2021-10-13 22:50:25,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-10-13 22:50:25,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-10-13 22:50:25,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3749 transitions. [2021-10-13 22:50:25,223 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8481900452488688 [2021-10-13 22:50:25,223 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3749 transitions. [2021-10-13 22:50:25,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3749 transitions. [2021-10-13 22:50:25,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:50:25,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3749 transitions. [2021-10-13 22:50:25,226 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 22:50:25,228 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 22:50:25,228 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 22:50:25,228 INFO L186 Difference]: Start difference. First operand has 928 places, 2291 transitions, 129754 flow. Second operand 65 states and 3749 transitions. [2021-10-13 22:50:25,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 986 places, 2394 transitions, 141960 flow [2021-10-13 22:50:31,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 933 places, 2394 transitions, 139757 flow, removed 853 selfloop flow, removed 53 redundant places. [2021-10-13 22:50:31,832 INFO L242 Difference]: Finished difference. Result has 945 places, 2343 transitions, 136241 flow [2021-10-13 22:50:31,834 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=127721, PETRI_DIFFERENCE_MINUEND_PLACES=869, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1711, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=136241, PETRI_PLACES=945, PETRI_TRANSITIONS=2343} [2021-10-13 22:50:31,834 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 877 predicate places. [2021-10-13 22:50:31,834 INFO L470 AbstractCegarLoop]: Abstraction has has 945 places, 2343 transitions, 136241 flow [2021-10-13 22:50:31,835 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 22:50:31,835 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:50:31,835 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 22:50:31,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-10-13 22:50:32,051 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,SelfDestructingSolverStorable64 [2021-10-13 22:50:32,051 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:50:32,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:50:32,052 INFO L82 PathProgramCache]: Analyzing trace with hash 230828137, now seen corresponding path program 29 times [2021-10-13 22:50:32,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:50:32,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050478187] [2021-10-13 22:50:32,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:50:32,052 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:50:32,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:50:32,161 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 22:50:32,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:50:32,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050478187] [2021-10-13 22:50:32,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050478187] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:32,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270519280] [2021-10-13 22:50:32,161 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:50:32,161 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:32,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:50:32,162 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 22:50:32,163 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 22:50:34,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 22:50:34,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:50:34,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:50:34,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:50:34,483 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 22:50:34,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270519280] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:34,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:50:34,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-13 22:50:34,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234772200] [2021-10-13 22:50:34,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:50:34,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:50:34,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:50:34,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:50:34,485 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:50:34,485 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 945 places, 2343 transitions, 136241 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 22:50:34,485 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:50:34,485 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:50:34,485 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:50:41,439 INFO L129 PetriNetUnfolder]: 1589/11476 cut-off events. [2021-10-13 22:50:41,440 INFO L130 PetriNetUnfolder]: For 710228/714209 co-relation queries the response was YES. [2021-10-13 22:50:41,625 INFO L84 FinitePrefix]: Finished finitePrefix Result has 103448 conditions, 11476 events. 1589/11476 cut-off events. For 710228/714209 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 158424 event pairs, 0 based on Foata normal form. 410/10672 useless extension candidates. Maximal degree in co-relation 103136. Up to 1878 conditions per place. [2021-10-13 22:50:41,692 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 495 selfloop transitions, 1969 changer transitions 22/2532 dead transitions. [2021-10-13 22:50:41,692 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1017 places, 2532 transitions, 153927 flow [2021-10-13 22:50:41,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-10-13 22:50:41,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-10-13 22:50:41,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 4556 transitions. [2021-10-13 22:50:41,694 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8481012658227848 [2021-10-13 22:50:41,694 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 4556 transitions. [2021-10-13 22:50:41,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 4556 transitions. [2021-10-13 22:50:41,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:50:41,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 4556 transitions. [2021-10-13 22:50:41,697 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 22:50:41,700 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 22:50:41,700 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 22:50:41,700 INFO L186 Difference]: Start difference. First operand has 945 places, 2343 transitions, 136241 flow. Second operand 79 states and 4556 transitions. [2021-10-13 22:50:41,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1017 places, 2532 transitions, 153927 flow [2021-10-13 22:50:48,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 969 places, 2532 transitions, 152250 flow, removed 533 selfloop flow, removed 48 redundant places. [2021-10-13 22:50:48,811 INFO L242 Difference]: Finished difference. Result has 985 places, 2477 transitions, 148468 flow [2021-10-13 22:50:48,817 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=134766, PETRI_DIFFERENCE_MINUEND_PLACES=891, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1849, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=148468, PETRI_PLACES=985, PETRI_TRANSITIONS=2477} [2021-10-13 22:50:48,817 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 917 predicate places. [2021-10-13 22:50:48,817 INFO L470 AbstractCegarLoop]: Abstraction has has 985 places, 2477 transitions, 148468 flow [2021-10-13 22:50:48,819 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 22:50:48,819 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:50:48,819 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 22:50:48,844 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 22:50:49,028 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,SelfDestructingSolverStorable65 [2021-10-13 22:50:49,028 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:50:49,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:50:49,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1902624575, now seen corresponding path program 30 times [2021-10-13 22:50:49,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:50:49,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537305284] [2021-10-13 22:50:49,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:50:49,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:50:49,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:50:49,139 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 22:50:49,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:50:49,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537305284] [2021-10-13 22:50:49,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537305284] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:49,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269201683] [2021-10-13 22:50:49,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:50:49,139 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:49,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:50:49,141 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 22:50:49,141 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 22:50:51,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-13 22:50:51,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:50:51,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:50:51,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:50:51,432 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 22:50:51,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269201683] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:51,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:50:51,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-13 22:50:51,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568014282] [2021-10-13 22:50:51,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:50:51,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:50:51,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:50:51,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:50:51,434 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:50:51,434 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 985 places, 2477 transitions, 148468 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 22:50:51,434 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:50:51,434 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:50:51,434 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:50:59,171 INFO L129 PetriNetUnfolder]: 1623/11708 cut-off events. [2021-10-13 22:50:59,172 INFO L130 PetriNetUnfolder]: For 749675/753513 co-relation queries the response was YES. [2021-10-13 22:50:59,383 INFO L84 FinitePrefix]: Finished finitePrefix Result has 108629 conditions, 11708 events. 1623/11708 cut-off events. For 749675/753513 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 162569 event pairs, 0 based on Foata normal form. 350/10820 useless extension candidates. Maximal degree in co-relation 108307. Up to 1939 conditions per place. [2021-10-13 22:50:59,459 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 641 selfloop transitions, 1887 changer transitions 17/2591 dead transitions. [2021-10-13 22:50:59,459 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1054 places, 2591 transitions, 162245 flow [2021-10-13 22:50:59,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-10-13 22:50:59,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-10-13 22:50:59,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 4496 transitions. [2021-10-13 22:50:59,461 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8476621417797888 [2021-10-13 22:50:59,461 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 4496 transitions. [2021-10-13 22:50:59,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 4496 transitions. [2021-10-13 22:50:59,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:50:59,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 4496 transitions. [2021-10-13 22:50:59,465 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 22:50:59,467 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 22:50:59,467 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 22:50:59,467 INFO L186 Difference]: Start difference. First operand has 985 places, 2477 transitions, 148468 flow. Second operand 78 states and 4496 transitions. [2021-10-13 22:50:59,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1054 places, 2591 transitions, 162245 flow [2021-10-13 22:51:08,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1000 places, 2591 transitions, 159113 flow, removed 1314 selfloop flow, removed 54 redundant places. [2021-10-13 22:51:08,352 INFO L242 Difference]: Finished difference. Result has 1012 places, 2538 transitions, 155308 flow [2021-10-13 22:51:08,354 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=145546, PETRI_DIFFERENCE_MINUEND_PLACES=923, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1833, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=623, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=155308, PETRI_PLACES=1012, PETRI_TRANSITIONS=2538} [2021-10-13 22:51:08,354 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 944 predicate places. [2021-10-13 22:51:08,354 INFO L470 AbstractCegarLoop]: Abstraction has has 1012 places, 2538 transitions, 155308 flow [2021-10-13 22:51:08,354 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 22:51:08,354 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:51:08,354 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 22:51:08,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-10-13 22:51:08,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:51:08,555 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:51:08,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:51:08,555 INFO L82 PathProgramCache]: Analyzing trace with hash 419253249, now seen corresponding path program 31 times [2021-10-13 22:51:08,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:51:08,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353806344] [2021-10-13 22:51:08,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:51:08,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:51:08,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:51:08,680 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 22:51:08,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:51:08,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353806344] [2021-10-13 22:51:08,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353806344] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:08,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963976734] [2021-10-13 22:51:08,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:51:08,680 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:51:08,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:51:08,681 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:51:08,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-10-13 22:51:10,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:51:10,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:51:10,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:51:10,962 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 22:51:10,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963976734] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:10,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:51:10,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-13 22:51:10,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550174102] [2021-10-13 22:51:10,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:51:10,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:51:10,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:51:10,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:51:10,964 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:51:10,965 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1012 places, 2538 transitions, 155308 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 22:51:10,965 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:51:10,965 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:51:10,966 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:51:19,199 INFO L129 PetriNetUnfolder]: 1644/11851 cut-off events. [2021-10-13 22:51:19,199 INFO L130 PetriNetUnfolder]: For 793759/797549 co-relation queries the response was YES. [2021-10-13 22:51:19,419 INFO L84 FinitePrefix]: Finished finitePrefix Result has 112052 conditions, 11851 events. 1644/11851 cut-off events. For 793759/797549 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 164888 event pairs, 0 based on Foata normal form. 320/10918 useless extension candidates. Maximal degree in co-relation 111724. Up to 1793 conditions per place. [2021-10-13 22:51:19,547 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 723 selfloop transitions, 1850 changer transitions 17/2636 dead transitions. [2021-10-13 22:51:19,547 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1081 places, 2636 transitions, 167985 flow [2021-10-13 22:51:19,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-10-13 22:51:19,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-10-13 22:51:19,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 4381 transitions. [2021-10-13 22:51:19,549 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8477167182662538 [2021-10-13 22:51:19,549 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 4381 transitions. [2021-10-13 22:51:19,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 4381 transitions. [2021-10-13 22:51:19,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:51:19,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 4381 transitions. [2021-10-13 22:51:19,553 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 22:51:19,555 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 22:51:19,555 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 22:51:19,555 INFO L186 Difference]: Start difference. First operand has 1012 places, 2538 transitions, 155308 flow. Second operand 76 states and 4381 transitions. [2021-10-13 22:51:19,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1081 places, 2636 transitions, 167985 flow [2021-10-13 22:51:28,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1026 places, 2636 transitions, 166246 flow, removed 552 selfloop flow, removed 55 redundant places. [2021-10-13 22:51:28,736 INFO L242 Difference]: Finished difference. Result has 1038 places, 2577 transitions, 161829 flow [2021-10-13 22:51:28,738 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=153595, PETRI_DIFFERENCE_MINUEND_PLACES=951, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1816, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=705, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=161829, PETRI_PLACES=1038, PETRI_TRANSITIONS=2577} [2021-10-13 22:51:28,738 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 970 predicate places. [2021-10-13 22:51:28,738 INFO L470 AbstractCegarLoop]: Abstraction has has 1038 places, 2577 transitions, 161829 flow [2021-10-13 22:51:28,738 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 22:51:28,738 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:51:28,738 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 22:51:28,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-10-13 22:51:28,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:51:28,942 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:51:28,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:51:28,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1755512087, now seen corresponding path program 32 times [2021-10-13 22:51:28,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:51:28,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656214416] [2021-10-13 22:51:28,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:51:28,943 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:51:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:51:29,042 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 22:51:29,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:51:29,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656214416] [2021-10-13 22:51:29,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656214416] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:29,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409535208] [2021-10-13 22:51:29,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:51:29,042 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:51:29,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:51:29,043 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:51:29,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-10-13 22:51:30,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:51:30,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:51:30,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:51:30,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:51:31,283 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 22:51:31,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409535208] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:31,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:51:31,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-13 22:51:31,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26893909] [2021-10-13 22:51:31,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:51:31,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:51:31,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:51:31,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:51:31,285 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:51:31,285 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1038 places, 2577 transitions, 161829 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 22:51:31,285 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:51:31,285 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:51:31,285 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:51:39,537 INFO L129 PetriNetUnfolder]: 1706/12258 cut-off events. [2021-10-13 22:51:39,538 INFO L130 PetriNetUnfolder]: For 861629/865882 co-relation queries the response was YES. [2021-10-13 22:51:39,758 INFO L84 FinitePrefix]: Finished finitePrefix Result has 118699 conditions, 12258 events. 1706/12258 cut-off events. For 861629/865882 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 171671 event pairs, 0 based on Foata normal form. 346/11309 useless extension candidates. Maximal degree in co-relation 118365. Up to 1893 conditions per place. [2021-10-13 22:51:39,840 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 837 selfloop transitions, 1845 changer transitions 17/2745 dead transitions. [2021-10-13 22:51:39,840 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1100 places, 2745 transitions, 179145 flow [2021-10-13 22:51:39,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-10-13 22:51:39,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-10-13 22:51:39,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 3979 transitions. [2021-10-13 22:51:39,842 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8480392156862745 [2021-10-13 22:51:39,842 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 3979 transitions. [2021-10-13 22:51:39,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 3979 transitions. [2021-10-13 22:51:39,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:51:39,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 3979 transitions. [2021-10-13 22:51:39,845 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 22:51:39,847 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 22:51:39,848 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 22:51:39,848 INFO L186 Difference]: Start difference. First operand has 1038 places, 2577 transitions, 161829 flow. Second operand 69 states and 3979 transitions. [2021-10-13 22:51:39,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1100 places, 2745 transitions, 179145 flow [2021-10-13 22:51:49,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1045 places, 2745 transitions, 177709 flow, removed 370 selfloop flow, removed 55 redundant places. [2021-10-13 22:51:49,522 INFO L242 Difference]: Finished difference. Result has 1058 places, 2677 transitions, 172607 flow [2021-10-13 22:51:49,524 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=160671, PETRI_DIFFERENCE_MINUEND_PLACES=977, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1750, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=763, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=172607, PETRI_PLACES=1058, PETRI_TRANSITIONS=2677} [2021-10-13 22:51:49,524 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 990 predicate places. [2021-10-13 22:51:49,524 INFO L470 AbstractCegarLoop]: Abstraction has has 1058 places, 2677 transitions, 172607 flow [2021-10-13 22:51:49,524 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 22:51:49,524 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:51:49,524 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 22:51:49,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-10-13 22:51:49,724 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,SelfDestructingSolverStorable68 [2021-10-13 22:51:49,725 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:51:49,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:51:49,725 INFO L82 PathProgramCache]: Analyzing trace with hash 519991125, now seen corresponding path program 33 times [2021-10-13 22:51:49,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:51:49,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34166331] [2021-10-13 22:51:49,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:51:49,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:51:49,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:51:49,824 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 22:51:49,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:51:49,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34166331] [2021-10-13 22:51:49,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34166331] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:49,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876311788] [2021-10-13 22:51:49,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:51:49,824 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:51:49,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:51:49,825 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:51:49,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-10-13 22:51:51,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-13 22:51:51,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:51:51,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:51:51,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:51:52,053 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 22:51:52,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876311788] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:52,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:51:52,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-13 22:51:52,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689401083] [2021-10-13 22:51:52,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:51:52,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:51:52,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:51:52,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:51:52,054 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:51:52,055 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1058 places, 2677 transitions, 172607 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 22:51:52,055 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:51:52,055 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:51:52,055 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:52:00,682 INFO L129 PetriNetUnfolder]: 1760/12660 cut-off events. [2021-10-13 22:52:00,682 INFO L130 PetriNetUnfolder]: For 925343/929954 co-relation queries the response was YES. [2021-10-13 22:52:00,940 INFO L84 FinitePrefix]: Finished finitePrefix Result has 125430 conditions, 12660 events. 1760/12660 cut-off events. For 925343/929954 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 177288 event pairs, 0 based on Foata normal form. 248/11570 useless extension candidates. Maximal degree in co-relation 125090. Up to 2074 conditions per place. [2021-10-13 22:52:01,027 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 1424 selfloop transitions, 1350 changer transitions 17/2837 dead transitions. [2021-10-13 22:52:01,027 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1121 places, 2837 transitions, 189724 flow [2021-10-13 22:52:01,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-10-13 22:52:01,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-10-13 22:52:01,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 4035 transitions. [2021-10-13 22:52:01,029 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8476890756302521 [2021-10-13 22:52:01,029 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 4035 transitions. [2021-10-13 22:52:01,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 4035 transitions. [2021-10-13 22:52:01,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:52:01,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 4035 transitions. [2021-10-13 22:52:01,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 57.642857142857146) internal successors, (4035), 70 states have internal predecessors, (4035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:01,034 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 22:52:01,034 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 22:52:01,034 INFO L186 Difference]: Start difference. First operand has 1058 places, 2677 transitions, 172607 flow. Second operand 70 states and 4035 transitions. [2021-10-13 22:52:01,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1121 places, 2837 transitions, 189724 flow [2021-10-13 22:52:12,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1071 places, 2837 transitions, 188498 flow, removed 277 selfloop flow, removed 50 redundant places. [2021-10-13 22:52:12,669 INFO L242 Difference]: Finished difference. Result has 1083 places, 2767 transitions, 181920 flow [2021-10-13 22:52:12,670 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=171416, PETRI_DIFFERENCE_MINUEND_PLACES=1002, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=181920, PETRI_PLACES=1083, PETRI_TRANSITIONS=2767} [2021-10-13 22:52:12,670 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 1015 predicate places. [2021-10-13 22:52:12,670 INFO L470 AbstractCegarLoop]: Abstraction has has 1083 places, 2767 transitions, 181920 flow [2021-10-13 22:52:12,671 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 22:52:12,671 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:52:12,671 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 22:52:12,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-10-13 22:52:12,871 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,SelfDestructingSolverStorable69 [2021-10-13 22:52:12,871 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:52:12,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:52:12,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1394071563, now seen corresponding path program 34 times [2021-10-13 22:52:12,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:52:12,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930090157] [2021-10-13 22:52:12,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:52:12,872 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:52:12,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:52:12,981 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 22:52:12,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:52:12,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930090157] [2021-10-13 22:52:12,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930090157] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:52:12,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249367622] [2021-10-13 22:52:12,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:52:12,982 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:52:12,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:52:12,983 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 22:52:12,983 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 22:52:15,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:52:15,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:52:15,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:52:15,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:52:15,420 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 22:52:15,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249367622] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:52:15,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:52:15,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-13 22:52:15,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010977268] [2021-10-13 22:52:15,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:52:15,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:52:15,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:52:15,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:52:15,422 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:52:15,423 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1083 places, 2767 transitions, 181920 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 22:52:15,423 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:52:15,423 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:52:15,423 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:52:24,860 INFO L129 PetriNetUnfolder]: 1820/13079 cut-off events. [2021-10-13 22:52:24,860 INFO L130 PetriNetUnfolder]: For 988737/993915 co-relation queries the response was YES. [2021-10-13 22:52:25,112 INFO L84 FinitePrefix]: Finished finitePrefix Result has 131888 conditions, 13079 events. 1820/13079 cut-off events. For 988737/993915 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 184407 event pairs, 0 based on Foata normal form. 376/12072 useless extension candidates. Maximal degree in co-relation 131542. Up to 2082 conditions per place. [2021-10-13 22:52:25,199 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 1065 selfloop transitions, 1803 changer transitions 17/2931 dead transitions. [2021-10-13 22:52:25,200 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1152 places, 2931 transitions, 200170 flow [2021-10-13 22:52:25,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-10-13 22:52:25,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-10-13 22:52:25,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 4381 transitions. [2021-10-13 22:52:25,202 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8477167182662538 [2021-10-13 22:52:25,202 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 4381 transitions. [2021-10-13 22:52:25,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 4381 transitions. [2021-10-13 22:52:25,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:52:25,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 4381 transitions. [2021-10-13 22:52:25,205 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 22:52:25,207 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 22:52:25,207 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 22:52:25,207 INFO L186 Difference]: Start difference. First operand has 1083 places, 2767 transitions, 181920 flow. Second operand 76 states and 4381 transitions. [2021-10-13 22:52:25,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1152 places, 2931 transitions, 200170 flow [2021-10-13 22:52:37,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1102 places, 2931 transitions, 198508 flow, removed 594 selfloop flow, removed 50 redundant places. [2021-10-13 22:52:37,323 INFO L242 Difference]: Finished difference. Result has 1114 places, 2868 transitions, 192878 flow [2021-10-13 22:52:37,324 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=180272, PETRI_DIFFERENCE_MINUEND_PLACES=1027, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1714, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1021, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=192878, PETRI_PLACES=1114, PETRI_TRANSITIONS=2868} [2021-10-13 22:52:37,325 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 1046 predicate places. [2021-10-13 22:52:37,325 INFO L470 AbstractCegarLoop]: Abstraction has has 1114 places, 2868 transitions, 192878 flow [2021-10-13 22:52:37,325 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 22:52:37,325 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:52:37,325 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:52:37,349 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 22:52:37,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:52:37,526 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:52:37,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:52:37,526 INFO L82 PathProgramCache]: Analyzing trace with hash 934253819, now seen corresponding path program 4 times [2021-10-13 22:52:37,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:52:37,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118523451] [2021-10-13 22:52:37,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:52:37,526 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:52:37,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:52:37,730 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:52:37,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:52:37,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118523451] [2021-10-13 22:52:37,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118523451] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:52:37,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924686048] [2021-10-13 22:52:37,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:52:37,731 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:52:37,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:52:37,744 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 22:52:37,745 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 22:52:39,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:52:39,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:52:39,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 22:52:39,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:52:40,159 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:52:40,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924686048] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:52:40,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:52:40,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-10-13 22:52:40,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189931250] [2021-10-13 22:52:40,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 22:52:40,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:52:40,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 22:52:40,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2021-10-13 22:52:40,161 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:52:40,161 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1114 places, 2868 transitions, 192878 flow. Second operand has 25 states, 25 states have (on average 56.08) internal successors, (1402), 25 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:40,161 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:52:40,161 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:52:40,161 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:52:48,493 INFO L129 PetriNetUnfolder]: 1839/13243 cut-off events. [2021-10-13 22:52:48,493 INFO L130 PetriNetUnfolder]: For 1015110/1020159 co-relation queries the response was YES. [2021-10-13 22:52:48,747 INFO L84 FinitePrefix]: Finished finitePrefix Result has 135799 conditions, 13243 events. 1839/13243 cut-off events. For 1015110/1020159 co-relation queries the response was YES. Maximal size of possible extension queue 688. Compared 186759 event pairs, 0 based on Foata normal form. 92/11934 useless extension candidates. Maximal degree in co-relation 135446. Up to 3285 conditions per place. [2021-10-13 22:52:48,835 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 2685 selfloop transitions, 175 changer transitions 11/2917 dead transitions. [2021-10-13 22:52:48,835 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1135 places, 2917 transitions, 203910 flow [2021-10-13 22:52:48,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 22:52:48,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-13 22:52:48,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1620 transitions. [2021-10-13 22:52:48,836 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8508403361344538 [2021-10-13 22:52:48,837 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1620 transitions. [2021-10-13 22:52:48,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1620 transitions. [2021-10-13 22:52:48,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:52:48,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1620 transitions. [2021-10-13 22:52:48,838 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 22:52:48,839 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 22:52:48,839 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 22:52:48,839 INFO L186 Difference]: Start difference. First operand has 1114 places, 2868 transitions, 192878 flow. Second operand 28 states and 1620 transitions. [2021-10-13 22:52:48,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1135 places, 2917 transitions, 203910 flow [2021-10-13 22:53:01,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1078 places, 2917 transitions, 201651 flow, removed 744 selfloop flow, removed 57 redundant places. [2021-10-13 22:53:01,670 INFO L242 Difference]: Finished difference. Result has 1085 places, 2904 transitions, 194039 flow [2021-10-13 22:53:01,672 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=190631, PETRI_DIFFERENCE_MINUEND_PLACES=1051, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2868, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2721, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=194039, PETRI_PLACES=1085, PETRI_TRANSITIONS=2904} [2021-10-13 22:53:01,672 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 1017 predicate places. [2021-10-13 22:53:01,673 INFO L470 AbstractCegarLoop]: Abstraction has has 1085 places, 2904 transitions, 194039 flow [2021-10-13 22:53:01,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.08) internal successors, (1402), 25 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:01,673 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:53:01,673 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:53:01,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-10-13 22:53:01,873 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,SelfDestructingSolverStorable71 [2021-10-13 22:53:01,874 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:53:01,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:53:01,874 INFO L82 PathProgramCache]: Analyzing trace with hash -528993388, now seen corresponding path program 24 times [2021-10-13 22:53:01,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:53:01,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274949108] [2021-10-13 22:53:01,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:53:01,874 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:53:01,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:53:02,003 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:53:02,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:53:02,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274949108] [2021-10-13 22:53:02,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274949108] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:53:02,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668350582] [2021-10-13 22:53:02,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:53:02,004 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:53:02,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:53:02,004 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 22:53:02,005 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 22:53:04,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-13 22:53:04,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:53:04,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 22:53:04,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:53:04,572 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:53:04,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668350582] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:53:04,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:53:04,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-10-13 22:53:04,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044189123] [2021-10-13 22:53:04,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 22:53:04,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:53:04,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 22:53:04,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2021-10-13 22:53:04,574 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:53:04,574 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1085 places, 2904 transitions, 194039 flow. Second operand has 25 states, 25 states have (on average 56.08) internal successors, (1402), 25 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:04,574 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:53:04,574 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:53:04,574 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:53:13,476 INFO L129 PetriNetUnfolder]: 1836/13246 cut-off events. [2021-10-13 22:53:13,476 INFO L130 PetriNetUnfolder]: For 959490/964438 co-relation queries the response was YES. [2021-10-13 22:53:13,755 INFO L84 FinitePrefix]: Finished finitePrefix Result has 134574 conditions, 13246 events. 1836/13246 cut-off events. For 959490/964438 co-relation queries the response was YES. Maximal size of possible extension queue 688. Compared 186890 event pairs, 0 based on Foata normal form. 90/11934 useless extension candidates. Maximal degree in co-relation 134219. Up to 3272 conditions per place. [2021-10-13 22:53:13,864 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 2746 selfloop transitions, 141 changer transitions 5/2938 dead transitions. [2021-10-13 22:53:13,864 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1099 places, 2938 transitions, 202126 flow [2021-10-13 22:53:13,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-13 22:53:13,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-13 22:53:13,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1095 transitions. [2021-10-13 22:53:13,865 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8475232198142415 [2021-10-13 22:53:13,865 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1095 transitions. [2021-10-13 22:53:13,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1095 transitions. [2021-10-13 22:53:13,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:53:13,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1095 transitions. [2021-10-13 22:53:13,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 57.63157894736842) internal successors, (1095), 19 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:13,867 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 22:53:13,867 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 22:53:13,867 INFO L186 Difference]: Start difference. First operand has 1085 places, 2904 transitions, 194039 flow. Second operand 19 states and 1095 transitions. [2021-10-13 22:53:13,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1099 places, 2938 transitions, 202126 flow [2021-10-13 22:53:25,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1078 places, 2938 transitions, 201388 flow, removed 280 selfloop flow, removed 21 redundant places. [2021-10-13 22:53:25,847 INFO L242 Difference]: Finished difference. Result has 1082 places, 2906 transitions, 193814 flow [2021-10-13 22:53:25,849 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=193310, PETRI_DIFFERENCE_MINUEND_PLACES=1060, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2904, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2763, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=193814, PETRI_PLACES=1082, PETRI_TRANSITIONS=2906} [2021-10-13 22:53:25,849 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 1014 predicate places. [2021-10-13 22:53:25,849 INFO L470 AbstractCegarLoop]: Abstraction has has 1082 places, 2906 transitions, 193814 flow [2021-10-13 22:53:25,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.08) internal successors, (1402), 25 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:25,849 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:53:25,849 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:53:25,874 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 22:53:26,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:53:26,050 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:53:26,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:53:26,050 INFO L82 PathProgramCache]: Analyzing trace with hash 2058195512, now seen corresponding path program 25 times [2021-10-13 22:53:26,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:53:26,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833905586] [2021-10-13 22:53:26,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:53:26,051 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:53:26,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:53:26,236 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:53:26,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:53:26,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833905586] [2021-10-13 22:53:26,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833905586] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:53:26,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2346896] [2021-10-13 22:53:26,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:53:26,237 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:53:26,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:53:26,238 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 22:53:26,239 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 22:53:28,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:53:28,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 22:53:28,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:53:28,778 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:53:28,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2346896] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:53:28,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:53:28,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-10-13 22:53:28,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929047653] [2021-10-13 22:53:28,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 22:53:28,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:53:28,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 22:53:28,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2021-10-13 22:53:28,780 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:53:28,781 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1082 places, 2906 transitions, 193814 flow. Second operand has 25 states, 25 states have (on average 56.08) internal successors, (1402), 25 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:28,781 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:53:28,781 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:53:28,781 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:53:37,379 INFO L129 PetriNetUnfolder]: 1837/13255 cut-off events. [2021-10-13 22:53:37,379 INFO L130 PetriNetUnfolder]: For 967587/972543 co-relation queries the response was YES. [2021-10-13 22:53:37,626 INFO L84 FinitePrefix]: Finished finitePrefix Result has 134590 conditions, 13255 events. 1837/13255 cut-off events. For 967587/972543 co-relation queries the response was YES. Maximal size of possible extension queue 690. Compared 187060 event pairs, 0 based on Foata normal form. 90/11942 useless extension candidates. Maximal degree in co-relation 134234. Up to 3235 conditions per place. [2021-10-13 22:53:37,714 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 2707 selfloop transitions, 181 changer transitions 5/2939 dead transitions. [2021-10-13 22:53:37,714 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1099 places, 2939 transitions, 201865 flow [2021-10-13 22:53:37,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 22:53:37,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-13 22:53:37,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1153 transitions. [2021-10-13 22:53:37,715 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8477941176470588 [2021-10-13 22:53:37,715 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1153 transitions. [2021-10-13 22:53:37,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1153 transitions. [2021-10-13 22:53:37,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:53:37,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1153 transitions. [2021-10-13 22:53:37,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 57.65) internal successors, (1153), 20 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:37,717 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 22:53:37,717 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 22:53:37,717 INFO L186 Difference]: Start difference. First operand has 1082 places, 2906 transitions, 193814 flow. Second operand 20 states and 1153 transitions. [2021-10-13 22:53:37,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1099 places, 2939 transitions, 201865 flow [2021-10-13 22:53:49,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1083 places, 2939 transitions, 201637 flow, removed 13 selfloop flow, removed 16 redundant places. [2021-10-13 22:53:49,958 INFO L242 Difference]: Finished difference. Result has 1087 places, 2908 transitions, 194219 flow [2021-10-13 22:53:49,960 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=193596, PETRI_DIFFERENCE_MINUEND_PLACES=1064, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2906, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2725, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=194219, PETRI_PLACES=1087, PETRI_TRANSITIONS=2908} [2021-10-13 22:53:49,960 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 1019 predicate places. [2021-10-13 22:53:49,960 INFO L470 AbstractCegarLoop]: Abstraction has has 1087 places, 2908 transitions, 194219 flow [2021-10-13 22:53:49,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.08) internal successors, (1402), 25 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:49,960 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:53:49,960 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:53:49,987 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 22:53:50,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:53:50,175 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:53:50,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:53:50,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1931440136, now seen corresponding path program 26 times [2021-10-13 22:53:50,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:53:50,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647802882] [2021-10-13 22:53:50,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:53:50,176 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:53:50,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:53:50,298 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:53:50,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:53:50,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647802882] [2021-10-13 22:53:50,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647802882] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:53:50,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429101410] [2021-10-13 22:53:50,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:53:50,299 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:53:50,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:53:50,300 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 22:53:50,300 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 22:53:52,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:53:52,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:53:52,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 22:53:52,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:53:52,855 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:53:52,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429101410] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:53:52,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:53:52,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-10-13 22:53:52,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684525859] [2021-10-13 22:53:52,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 22:53:52,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:53:52,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 22:53:52,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-10-13 22:53:52,856 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:53:52,857 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1087 places, 2908 transitions, 194219 flow. Second operand has 25 states, 25 states have (on average 56.08) internal successors, (1402), 25 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:52,857 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:53:52,857 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:53:52,857 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:54:01,433 INFO L129 PetriNetUnfolder]: 1840/13275 cut-off events. [2021-10-13 22:54:01,433 INFO L130 PetriNetUnfolder]: For 980934/985909 co-relation queries the response was YES. [2021-10-13 22:54:01,681 INFO L84 FinitePrefix]: Finished finitePrefix Result has 134983 conditions, 13275 events. 1840/13275 cut-off events. For 980934/985909 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 187558 event pairs, 0 based on Foata normal form. 90/11961 useless extension candidates. Maximal degree in co-relation 134625. Up to 3211 conditions per place. [2021-10-13 22:54:01,857 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 2678 selfloop transitions, 212 changer transitions 5/2941 dead transitions. [2021-10-13 22:54:01,857 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1105 places, 2941 transitions, 202511 flow [2021-10-13 22:54:01,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-13 22:54:01,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-13 22:54:01,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1211 transitions. [2021-10-13 22:54:01,858 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8480392156862745 [2021-10-13 22:54:01,858 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1211 transitions. [2021-10-13 22:54:01,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1211 transitions. [2021-10-13 22:54:01,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:54:01,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1211 transitions. [2021-10-13 22:54:01,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 57.666666666666664) internal successors, (1211), 21 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:01,859 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 22:54:01,860 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 22:54:01,860 INFO L186 Difference]: Start difference. First operand has 1087 places, 2908 transitions, 194219 flow. Second operand 21 states and 1211 transitions. [2021-10-13 22:54:01,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1105 places, 2941 transitions, 202511 flow [2021-10-13 22:54:14,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1090 places, 2941 transitions, 202242 flow, removed 19 selfloop flow, removed 15 redundant places. [2021-10-13 22:54:14,249 INFO L242 Difference]: Finished difference. Result has 1093 places, 2911 transitions, 194780 flow [2021-10-13 22:54:14,251 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=193970, PETRI_DIFFERENCE_MINUEND_PLACES=1070, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2908, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2696, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=194780, PETRI_PLACES=1093, PETRI_TRANSITIONS=2911} [2021-10-13 22:54:14,251 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 1025 predicate places. [2021-10-13 22:54:14,251 INFO L470 AbstractCegarLoop]: Abstraction has has 1093 places, 2911 transitions, 194780 flow [2021-10-13 22:54:14,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.08) internal successors, (1402), 25 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:14,251 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:54:14,251 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:54:14,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-10-13 22:54:14,452 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,SelfDestructingSolverStorable74 [2021-10-13 22:54:14,452 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:54:14,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:54:14,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1666851922, now seen corresponding path program 27 times [2021-10-13 22:54:14,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:54:14,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730059313] [2021-10-13 22:54:14,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:54:14,452 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:54:14,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:54:14,581 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:54:14,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:54:14,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730059313] [2021-10-13 22:54:14,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730059313] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:54:14,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458396735] [2021-10-13 22:54:14,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:54:14,582 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:54:14,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:54:14,583 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 22:54:14,583 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 22:54:16,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-10-13 22:54:16,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:54:16,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 22:54:16,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:54:17,196 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:54:17,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458396735] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:54:17,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:54:17,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-10-13 22:54:17,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318719436] [2021-10-13 22:54:17,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 22:54:17,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:54:17,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 22:54:17,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2021-10-13 22:54:17,198 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:54:17,198 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1093 places, 2911 transitions, 194780 flow. Second operand has 25 states, 25 states have (on average 56.08) internal successors, (1402), 25 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:17,198 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:54:17,198 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:54:17,198 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:54:27,481 INFO L129 PetriNetUnfolder]: 1998/14415 cut-off events. [2021-10-13 22:54:27,481 INFO L130 PetriNetUnfolder]: For 1306952/1312205 co-relation queries the response was YES. [2021-10-13 22:54:27,751 INFO L84 FinitePrefix]: Finished finitePrefix Result has 149404 conditions, 14415 events. 1998/14415 cut-off events. For 1306952/1312205 co-relation queries the response was YES. Maximal size of possible extension queue 711. Compared 202764 event pairs, 0 based on Foata normal form. 277/13167 useless extension candidates. Maximal degree in co-relation 149045. Up to 2306 conditions per place. [2021-10-13 22:54:27,848 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 1314 selfloop transitions, 1794 changer transitions 26/3180 dead transitions. [2021-10-13 22:54:27,848 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1163 places, 3180 transitions, 222953 flow [2021-10-13 22:54:27,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-10-13 22:54:27,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-10-13 22:54:27,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 4212 transitions. [2021-10-13 22:54:27,850 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8485092667203867 [2021-10-13 22:54:27,850 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 4212 transitions. [2021-10-13 22:54:27,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 4212 transitions. [2021-10-13 22:54:27,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:54:27,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 4212 transitions. [2021-10-13 22:54:27,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 57.6986301369863) internal successors, (4212), 73 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:27,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 68.0) internal successors, (5032), 74 states have internal predecessors, (5032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:27,856 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 68.0) internal successors, (5032), 74 states have internal predecessors, (5032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:27,856 INFO L186 Difference]: Start difference. First operand has 1093 places, 2911 transitions, 194780 flow. Second operand 73 states and 4212 transitions. [2021-10-13 22:54:27,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1163 places, 3180 transitions, 222953 flow [2021-10-13 22:54:43,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1146 places, 3180 transitions, 222513 flow, removed 68 selfloop flow, removed 17 redundant places. [2021-10-13 22:54:43,159 INFO L242 Difference]: Finished difference. Result has 1164 places, 3127 transitions, 215565 flow [2021-10-13 22:54:43,161 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=194488, PETRI_DIFFERENCE_MINUEND_PLACES=1074, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2911, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1601, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=215565, PETRI_PLACES=1164, PETRI_TRANSITIONS=3127} [2021-10-13 22:54:43,161 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 1096 predicate places. [2021-10-13 22:54:43,161 INFO L470 AbstractCegarLoop]: Abstraction has has 1164 places, 3127 transitions, 215565 flow [2021-10-13 22:54:43,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.08) internal successors, (1402), 25 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:43,161 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:54:43,161 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:54:43,187 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 22:54:43,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:54:43,362 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:54:43,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:54:43,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1337647598, now seen corresponding path program 28 times [2021-10-13 22:54:43,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:54:43,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010986320] [2021-10-13 22:54:43,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:54:43,363 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:54:43,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:54:43,475 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:54:43,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:54:43,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010986320] [2021-10-13 22:54:43,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010986320] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:54:43,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329354163] [2021-10-13 22:54:43,475 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:54:43,475 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:54:43,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:54:43,476 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 22:54:43,479 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 22:54:45,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:54:45,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:54:45,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 22:54:45,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:54:46,016 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:54:46,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329354163] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:54:46,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:54:46,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-10-13 22:54:46,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579964332] [2021-10-13 22:54:46,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 22:54:46,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:54:46,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 22:54:46,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-10-13 22:54:46,017 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:54:46,018 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1164 places, 3127 transitions, 215565 flow. Second operand has 25 states, 25 states have (on average 56.08) internal successors, (1402), 25 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:46,018 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:54:46,018 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:54:46,018 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:54:56,910 INFO L129 PetriNetUnfolder]: 2051/14900 cut-off events. [2021-10-13 22:54:56,910 INFO L130 PetriNetUnfolder]: For 1267214/1272847 co-relation queries the response was YES. [2021-10-13 22:54:57,227 INFO L84 FinitePrefix]: Finished finitePrefix Result has 156032 conditions, 14900 events. 2051/14900 cut-off events. For 1267214/1272847 co-relation queries the response was YES. Maximal size of possible extension queue 723. Compared 210443 event pairs, 0 based on Foata normal form. 258/13579 useless extension candidates. Maximal degree in co-relation 155657. Up to 2396 conditions per place. [2021-10-13 22:54:57,422 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 1546 selfloop transitions, 1674 changer transitions 17/3283 dead transitions. [2021-10-13 22:54:57,422 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1218 places, 3283 transitions, 235474 flow [2021-10-13 22:54:57,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-10-13 22:54:57,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-10-13 22:54:57,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3692 transitions. [2021-10-13 22:54:57,424 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8483455882352942 [2021-10-13 22:54:57,424 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3692 transitions. [2021-10-13 22:54:57,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3692 transitions. [2021-10-13 22:54:57,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:54:57,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3692 transitions. [2021-10-13 22:54:57,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 57.6875) internal successors, (3692), 64 states have internal predecessors, (3692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:57,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 68.0) internal successors, (4420), 65 states have internal predecessors, (4420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:57,429 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 68.0) internal successors, (4420), 65 states have internal predecessors, (4420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:57,429 INFO L186 Difference]: Start difference. First operand has 1164 places, 3127 transitions, 215565 flow. Second operand 64 states and 3692 transitions. [2021-10-13 22:54:57,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1218 places, 3283 transitions, 235474 flow [2021-10-13 22:55:14,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1150 places, 3283 transitions, 231732 flow, removed 1328 selfloop flow, removed 68 redundant places. [2021-10-13 22:55:14,911 INFO L242 Difference]: Finished difference. Result has 1162 places, 3225 transitions, 224757 flow [2021-10-13 22:55:14,913 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=212301, PETRI_DIFFERENCE_MINUEND_PLACES=1087, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1586, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=224757, PETRI_PLACES=1162, PETRI_TRANSITIONS=3225} [2021-10-13 22:55:14,913 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 1094 predicate places. [2021-10-13 22:55:14,914 INFO L470 AbstractCegarLoop]: Abstraction has has 1162 places, 3225 transitions, 224757 flow [2021-10-13 22:55:14,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.08) internal successors, (1402), 25 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:14,914 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:55:14,914 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 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 22:55:14,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-10-13 22:55:15,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:55:15,115 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:55:15,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:55:15,115 INFO L82 PathProgramCache]: Analyzing trace with hash 26058520, now seen corresponding path program 35 times [2021-10-13 22:55:15,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:55:15,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940330887] [2021-10-13 22:55:15,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:55:15,116 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:55:15,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:55:15,240 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:55:15,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:55:15,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940330887] [2021-10-13 22:55:15,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940330887] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:55:15,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701359952] [2021-10-13 22:55:15,241 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:55:15,241 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:55:15,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:55:15,243 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 22:55:15,245 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 22:55:17,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-13 22:55:17,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:55:17,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 22:55:17,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:55:17,917 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:55:17,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701359952] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:55:17,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:55:17,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-10-13 22:55:17,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134554759] [2021-10-13 22:55:17,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 22:55:17,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:55:17,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 22:55:17,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-10-13 22:55:17,918 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:55:17,919 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1162 places, 3225 transitions, 224757 flow. Second operand has 25 states, 25 states have (on average 56.08) internal successors, (1402), 25 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:17,919 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:55:17,919 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:55:17,919 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:55:32,414 INFO L129 PetriNetUnfolder]: 2118/15410 cut-off events. [2021-10-13 22:55:32,415 INFO L130 PetriNetUnfolder]: For 1326394/1332095 co-relation queries the response was YES. [2021-10-13 22:55:32,752 INFO L84 FinitePrefix]: Finished finitePrefix Result has 162295 conditions, 15410 events. 2118/15410 cut-off events. For 1326394/1332095 co-relation queries the response was YES. Maximal size of possible extension queue 742. Compared 219184 event pairs, 0 based on Foata normal form. 410/14186 useless extension candidates. Maximal degree in co-relation 161918. Up to 2486 conditions per place. [2021-10-13 22:55:32,865 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 780 selfloop transitions, 2544 changer transitions 17/3387 dead transitions. [2021-10-13 22:55:32,865 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1244 places, 3387 transitions, 244584 flow [2021-10-13 22:55:32,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-10-13 22:55:32,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2021-10-13 22:55:32,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 5128 transitions. [2021-10-13 22:55:32,868 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8473231989424983 [2021-10-13 22:55:32,868 INFO L72 ComplementDD]: Start complementDD. Operand 89 states and 5128 transitions. [2021-10-13 22:55:32,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 89 states and 5128 transitions. [2021-10-13 22:55:32,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:55:32,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 89 states and 5128 transitions. [2021-10-13 22:55:32,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 90 states, 89 states have (on average 57.61797752808989) internal successors, (5128), 89 states have internal predecessors, (5128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:32,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 90 states, 90 states have (on average 68.0) internal successors, (6120), 90 states have internal predecessors, (6120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:32,874 INFO L81 ComplementDD]: Finished complementDD. Result has 90 states, 90 states have (on average 68.0) internal successors, (6120), 90 states have internal predecessors, (6120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:32,874 INFO L186 Difference]: Start difference. First operand has 1162 places, 3225 transitions, 224757 flow. Second operand 89 states and 5128 transitions. [2021-10-13 22:55:32,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1244 places, 3387 transitions, 244584 flow [2021-10-13 22:55:51,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1199 places, 3387 transitions, 243271 flow, removed 375 selfloop flow, removed 45 redundant places. [2021-10-13 22:55:51,425 INFO L242 Difference]: Finished difference. Result has 1211 places, 3330 transitions, 238676 flow [2021-10-13 22:55:51,427 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=223456, PETRI_DIFFERENCE_MINUEND_PLACES=1111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2446, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=753, PETRI_DIFFERENCE_SUBTRAHEND_STATES=89, PETRI_FLOW=238676, PETRI_PLACES=1211, PETRI_TRANSITIONS=3330} [2021-10-13 22:55:51,427 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 1143 predicate places. [2021-10-13 22:55:51,427 INFO L470 AbstractCegarLoop]: Abstraction has has 1211 places, 3330 transitions, 238676 flow [2021-10-13 22:55:51,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.08) internal successors, (1402), 25 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:51,427 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:55:51,427 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 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 22:55:51,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-10-13 22:55:51,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:55:51,628 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:55:51,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:55:51,628 INFO L82 PathProgramCache]: Analyzing trace with hash -142042708, now seen corresponding path program 36 times [2021-10-13 22:55:51,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:55:51,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216153437] [2021-10-13 22:55:51,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:55:51,628 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:55:51,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:55:51,751 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:55:51,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:55:51,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216153437] [2021-10-13 22:55:51,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216153437] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:55:51,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300952592] [2021-10-13 22:55:51,751 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:55:51,752 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:55:51,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:55:51,752 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 22:55:51,753 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 22:55:53,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-10-13 22:55:53,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:55:53,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 22:55:53,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:55:54,560 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:55:54,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300952592] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:55:54,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:55:54,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-10-13 22:55:54,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565271212] [2021-10-13 22:55:54,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 22:55:54,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:55:54,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 22:55:54,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2021-10-13 22:55:54,561 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:55:54,562 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1211 places, 3330 transitions, 238676 flow. Second operand has 25 states, 25 states have (on average 56.08) internal successors, (1402), 25 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:54,562 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:55:54,562 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:55:54,562 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:56:08,948 INFO L129 PetriNetUnfolder]: 2176/15829 cut-off events. [2021-10-13 22:56:08,948 INFO L130 PetriNetUnfolder]: For 1417034/1422934 co-relation queries the response was YES. [2021-10-13 22:56:09,328 INFO L84 FinitePrefix]: Finished finitePrefix Result has 170758 conditions, 15829 events. 2176/15829 cut-off events. For 1417034/1422934 co-relation queries the response was YES. Maximal size of possible extension queue 767. Compared 226413 event pairs, 0 based on Foata normal form. 414/14565 useless extension candidates. Maximal degree in co-relation 170374. Up to 2583 conditions per place. [2021-10-13 22:56:09,451 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 966 selfloop transitions, 2466 changer transitions 17/3495 dead transitions. [2021-10-13 22:56:09,451 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1277 places, 3495 transitions, 258733 flow [2021-10-13 22:56:09,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-10-13 22:56:09,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-10-13 22:56:09,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 4208 transitions. [2021-10-13 22:56:09,457 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8477034649476228 [2021-10-13 22:56:09,457 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 4208 transitions. [2021-10-13 22:56:09,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 4208 transitions. [2021-10-13 22:56:09,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:56:09,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 4208 transitions. [2021-10-13 22:56:09,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 57.64383561643836) internal successors, (4208), 73 states have internal predecessors, (4208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:56:09,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 68.0) internal successors, (5032), 74 states have internal predecessors, (5032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:56:09,463 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 68.0) internal successors, (5032), 74 states have internal predecessors, (5032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:56:09,463 INFO L186 Difference]: Start difference. First operand has 1211 places, 3330 transitions, 238676 flow. Second operand 73 states and 4208 transitions. [2021-10-13 22:56:09,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1277 places, 3495 transitions, 258733 flow [2021-10-13 22:56:27,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1218 places, 3495 transitions, 254995 flow, removed 1420 selfloop flow, removed 59 redundant places. [2021-10-13 22:56:27,717 INFO L242 Difference]: Finished difference. Result has 1231 places, 3426 transitions, 249226 flow [2021-10-13 22:56:27,719 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=235049, PETRI_DIFFERENCE_MINUEND_PLACES=1146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2378, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=933, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=249226, PETRI_PLACES=1231, PETRI_TRANSITIONS=3426} [2021-10-13 22:56:27,719 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 1163 predicate places. [2021-10-13 22:56:27,719 INFO L470 AbstractCegarLoop]: Abstraction has has 1231 places, 3426 transitions, 249226 flow [2021-10-13 22:56:27,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.08) internal successors, (1402), 25 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:56:27,719 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:56:27,719 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 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 22:56:27,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-10-13 22:56:27,920 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,SelfDestructingSolverStorable78 [2021-10-13 22:56:27,920 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:56:27,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:56:27,920 INFO L82 PathProgramCache]: Analyzing trace with hash -2036154590, now seen corresponding path program 37 times [2021-10-13 22:56:27,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:56:27,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808550646] [2021-10-13 22:56:27,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:56:27,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:56:27,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:56:28,034 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:56:28,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:56:28,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808550646] [2021-10-13 22:56:28,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808550646] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:56:28,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958756056] [2021-10-13 22:56:28,034 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:56:28,035 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:56:28,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:56:28,035 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 22:56:28,036 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 22:56:30,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:56:30,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 22:56:30,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:56:35,095 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:56:35,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958756056] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:56:35,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:56:35,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-10-13 22:56:35,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753676540] [2021-10-13 22:56:35,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 22:56:35,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:56:35,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 22:56:35,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=452, Unknown=2, NotChecked=0, Total=600 [2021-10-13 22:56:35,097 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:56:35,097 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1231 places, 3426 transitions, 249226 flow. Second operand has 25 states, 25 states have (on average 56.08) internal successors, (1402), 25 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:56:35,097 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:56:35,097 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:56:35,097 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:57:00,503 INFO L129 PetriNetUnfolder]: 2197/15980 cut-off events. [2021-10-13 22:57:00,503 INFO L130 PetriNetUnfolder]: For 1477223/1483099 co-relation queries the response was YES. [2021-10-13 22:57:00,978 INFO L84 FinitePrefix]: Finished finitePrefix Result has 174916 conditions, 15980 events. 2197/15980 cut-off events. For 1477223/1483099 co-relation queries the response was YES. Maximal size of possible extension queue 773. Compared 229026 event pairs, 0 based on Foata normal form. 348/14634 useless extension candidates. Maximal degree in co-relation 174525. Up to 2502 conditions per place. [2021-10-13 22:57:01,097 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 1263 selfloop transitions, 2188 changer transitions 17/3514 dead transitions. [2021-10-13 22:57:01,097 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1291 places, 3514 transitions, 264497 flow [2021-10-13 22:57:01,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-10-13 22:57:01,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-10-13 22:57:01,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 3864 transitions. [2021-10-13 22:57:01,099 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8481123792800702 [2021-10-13 22:57:01,099 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 3864 transitions. [2021-10-13 22:57:01,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 3864 transitions. [2021-10-13 22:57:01,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:57:01,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 3864 transitions. [2021-10-13 22:57:01,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 57.67164179104478) internal successors, (3864), 67 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:57:01,104 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 22:57:01,104 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 22:57:01,104 INFO L186 Difference]: Start difference. First operand has 1231 places, 3426 transitions, 249226 flow. Second operand 67 states and 3864 transitions. [2021-10-13 22:57:01,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1291 places, 3514 transitions, 264497 flow [2021-10-13 22:57:20,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1247 places, 3514 transitions, 262347 flow, removed 819 selfloop flow, removed 44 redundant places. [2021-10-13 22:57:20,456 INFO L242 Difference]: Finished difference. Result has 1259 places, 3458 transitions, 256431 flow [2021-10-13 22:57:20,458 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=247098, PETRI_DIFFERENCE_MINUEND_PLACES=1181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=256431, PETRI_PLACES=1259, PETRI_TRANSITIONS=3458} [2021-10-13 22:57:20,458 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 1191 predicate places. [2021-10-13 22:57:20,458 INFO L470 AbstractCegarLoop]: Abstraction has has 1259 places, 3458 transitions, 256431 flow [2021-10-13 22:57:20,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.08) internal successors, (1402), 25 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:57:20,458 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:57:20,459 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 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 22:57:20,484 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 22:57:20,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:57:20,684 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:57:20,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:57:20,684 INFO L82 PathProgramCache]: Analyzing trace with hash 2109996578, now seen corresponding path program 38 times [2021-10-13 22:57:20,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:57:20,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045396367] [2021-10-13 22:57:20,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:57:20,684 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:57:20,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:57:20,802 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:57:20,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:57:20,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045396367] [2021-10-13 22:57:20,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045396367] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:57:20,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10940489] [2021-10-13 22:57:20,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:57:20,802 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:57:20,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:57:20,803 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 22:57:20,803 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 22:57:23,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:57:23,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:57:23,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 22:57:23,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:57:23,598 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:57:23,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10940489] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:57:23,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:57:23,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-10-13 22:57:23,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143256311] [2021-10-13 22:57:23,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 22:57:23,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:57:23,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 22:57:23,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-10-13 22:57:23,600 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:57:23,601 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1259 places, 3458 transitions, 256431 flow. Second operand has 25 states, 25 states have (on average 56.08) internal successors, (1402), 25 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:57:23,601 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:57:23,601 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:57:23,601 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:57:37,419 INFO L129 PetriNetUnfolder]: 2247/16345 cut-off events. [2021-10-13 22:57:37,419 INFO L130 PetriNetUnfolder]: For 1550892/1556699 co-relation queries the response was YES. [2021-10-13 22:57:37,783 INFO L84 FinitePrefix]: Finished finitePrefix Result has 181428 conditions, 16345 events. 2247/16345 cut-off events. For 1550892/1556699 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 235277 event pairs, 0 based on Foata normal form. 356/14968 useless extension candidates. Maximal degree in co-relation 181029. Up to 2552 conditions per place. [2021-10-13 22:57:37,986 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 1303 selfloop transitions, 2247 changer transitions 17/3613 dead transitions. [2021-10-13 22:57:37,987 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1317 places, 3613 transitions, 275443 flow [2021-10-13 22:57:37,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-10-13 22:57:37,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-10-13 22:57:38,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3748 transitions. [2021-10-13 22:57:38,000 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8479638009049774 [2021-10-13 22:57:38,000 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3748 transitions. [2021-10-13 22:57:38,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3748 transitions. [2021-10-13 22:57:38,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:57:38,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3748 transitions. [2021-10-13 22:57:38,003 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 22:57:38,005 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 22:57:38,005 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 22:57:38,005 INFO L186 Difference]: Start difference. First operand has 1259 places, 3458 transitions, 256431 flow. Second operand 65 states and 3748 transitions. [2021-10-13 22:57:38,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1317 places, 3613 transitions, 275443 flow [2021-10-13 22:57:57,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1269 places, 3613 transitions, 273188 flow, removed 839 selfloop flow, removed 48 redundant places. [2021-10-13 22:57:57,474 INFO L242 Difference]: Finished difference. Result has 1282 places, 3545 transitions, 266727 flow [2021-10-13 22:57:57,476 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=254244, PETRI_DIFFERENCE_MINUEND_PLACES=1205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=266727, PETRI_PLACES=1282, PETRI_TRANSITIONS=3545} [2021-10-13 22:57:57,476 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 1214 predicate places. [2021-10-13 22:57:57,476 INFO L470 AbstractCegarLoop]: Abstraction has has 1282 places, 3545 transitions, 266727 flow [2021-10-13 22:57:57,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.08) internal successors, (1402), 25 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:57:57,476 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:57:57,476 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 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 22:57:57,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-10-13 22:57:57,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:57:57,677 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:57:57,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:57:57,677 INFO L82 PathProgramCache]: Analyzing trace with hash 219487352, now seen corresponding path program 39 times [2021-10-13 22:57:57,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:57:57,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449652451] [2021-10-13 22:57:57,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:57:57,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:57:57,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:57:57,810 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:57:57,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:57:57,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449652451] [2021-10-13 22:57:57,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449652451] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:57:57,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624311479] [2021-10-13 22:57:57,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:57:57,811 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:57:57,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:57:57,811 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 22:57:57,812 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 22:58:00,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-13 22:58:00,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:58:00,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 22:58:00,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:58:00,687 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:58:00,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624311479] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:58:00,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:58:00,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-10-13 22:58:00,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826726330] [2021-10-13 22:58:00,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 22:58:00,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:58:00,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 22:58:00,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-10-13 22:58:00,689 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:58:00,689 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1282 places, 3545 transitions, 266727 flow. Second operand has 25 states, 25 states have (on average 56.08) internal successors, (1402), 25 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:58:00,689 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:58:00,689 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:58:00,689 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:58:16,567 INFO L129 PetriNetUnfolder]: 2285/16635 cut-off events. [2021-10-13 22:58:16,567 INFO L130 PetriNetUnfolder]: For 1637092/1643132 co-relation queries the response was YES. [2021-10-13 22:58:16,972 INFO L84 FinitePrefix]: Finished finitePrefix Result has 187783 conditions, 16635 events. 2285/16635 cut-off events. For 1637092/1643132 co-relation queries the response was YES. Maximal size of possible extension queue 801. Compared 240274 event pairs, 0 based on Foata normal form. 270/15141 useless extension candidates. Maximal degree in co-relation 187376. Up to 2735 conditions per place. [2021-10-13 22:58:17,094 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 1955 selfloop transitions, 1685 changer transitions 17/3703 dead transitions. [2021-10-13 22:58:17,094 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1336 places, 3703 transitions, 286711 flow [2021-10-13 22:58:17,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-10-13 22:58:17,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-10-13 22:58:17,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3518 transitions. [2021-10-13 22:58:17,096 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8481195756991321 [2021-10-13 22:58:17,096 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3518 transitions. [2021-10-13 22:58:17,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3518 transitions. [2021-10-13 22:58:17,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:58:17,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3518 transitions. [2021-10-13 22:58:17,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 57.67213114754098) internal successors, (3518), 61 states have internal predecessors, (3518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:58:17,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 68.0) internal successors, (4216), 62 states have internal predecessors, (4216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:58:17,100 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 68.0) internal successors, (4216), 62 states have internal predecessors, (4216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:58:17,100 INFO L186 Difference]: Start difference. First operand has 1282 places, 3545 transitions, 266727 flow. Second operand 61 states and 3518 transitions. [2021-10-13 22:58:17,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1336 places, 3703 transitions, 286711 flow [2021-10-13 22:58:37,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1292 places, 3703 transitions, 285109 flow, removed 466 selfloop flow, removed 44 redundant places. [2021-10-13 22:58:37,368 INFO L242 Difference]: Finished difference. Result has 1305 places, 3606 transitions, 275261 flow [2021-10-13 22:58:37,370 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=265184, PETRI_DIFFERENCE_MINUEND_PLACES=1232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1629, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1902, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=275261, PETRI_PLACES=1305, PETRI_TRANSITIONS=3606} [2021-10-13 22:58:37,370 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 1237 predicate places. [2021-10-13 22:58:37,370 INFO L470 AbstractCegarLoop]: Abstraction has has 1305 places, 3606 transitions, 275261 flow [2021-10-13 22:58:37,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.08) internal successors, (1402), 25 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:58:37,370 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:58:37,370 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 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 22:58:37,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-10-13 22:58:37,571 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,SelfDestructingSolverStorable81 [2021-10-13 22:58:37,571 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:58:37,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:58:37,571 INFO L82 PathProgramCache]: Analyzing trace with hash -880362142, now seen corresponding path program 40 times [2021-10-13 22:58:37,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:58:37,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012115944] [2021-10-13 22:58:37,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:58:37,571 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:58:37,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:58:37,686 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:58:37,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:58:37,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012115944] [2021-10-13 22:58:37,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012115944] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:58:37,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264316353] [2021-10-13 22:58:37,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:58:37,687 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:58:37,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:58:37,687 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 22:58:37,688 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 22:58:40,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:58:40,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:58:40,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 22:58:40,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:58:40,490 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:58:40,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264316353] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:58:40,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:58:40,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-10-13 22:58:40,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581960874] [2021-10-13 22:58:40,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 22:58:40,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:58:40,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 22:58:40,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-10-13 22:58:40,492 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2021-10-13 22:58:40,492 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1305 places, 3606 transitions, 275261 flow. Second operand has 25 states, 25 states have (on average 56.08) internal successors, (1402), 25 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:58:40,492 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:58:40,492 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2021-10-13 22:58:40,492 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2021-10-13 22:58:43,298 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-13 22:58:43,299 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-13 22:58:43,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-13 22:58:43,339 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 22:58:43,366 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 22:58:43,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:58:43,540 WARN L594 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (25states, 55/68 universal loopers) in iteration 83,while PetriNetUnfolder was constructing finite prefix that currently has 25376 conditions, 2348 events (151/2347 cut-off events. For 368270/368399 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 32917 event pairs, 0 based on Foata normal form. 100/2668 useless extension candidates. Maximal degree in co-relation 24998. Up to 274 conditions per place.). [2021-10-13 22:58:43,541 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-13 22:58:43,542 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-13 22:58:43,545 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-13 22:58:43,545 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 22:58:43,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 10:58:43 BasicIcfg [2021-10-13 22:58:43,546 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 22:58:43,547 INFO L168 Benchmark]: Toolchain (without parser) took 784737.13 ms. Allocated memory was 189.8 MB in the beginning and 6.3 GB in the end (delta: 6.2 GB). Free memory was 132.4 MB in the beginning and 922.5 MB in the end (delta: -790.1 MB). Peak memory consumption was 5.4 GB. Max. memory is 8.0 GB. [2021-10-13 22:58:43,547 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 189.8 MB. Free memory was 150.3 MB in the beginning and 150.2 MB in the end (delta: 125.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-10-13 22:58:43,547 INFO L168 Benchmark]: CACSL2BoogieTranslator took 357.78 ms. Allocated memory was 189.8 MB in the beginning and 312.5 MB in the end (delta: 122.7 MB). Free memory was 132.3 MB in the beginning and 275.2 MB in the end (delta: -142.9 MB). Peak memory consumption was 8.2 MB. Max. memory is 8.0 GB. [2021-10-13 22:58:43,547 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.46 ms. Allocated memory is still 312.5 MB. Free memory was 275.2 MB in the beginning and 273.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-13 22:58:43,548 INFO L168 Benchmark]: Boogie Preprocessor took 29.81 ms. Allocated memory is still 312.5 MB. Free memory was 273.1 MB in the beginning and 272.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-10-13 22:58:43,548 INFO L168 Benchmark]: RCFGBuilder took 232.70 ms. Allocated memory is still 312.5 MB. Free memory was 272.1 MB in the beginning and 259.5 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-10-13 22:58:43,548 INFO L168 Benchmark]: TraceAbstraction took 784063.39 ms. Allocated memory was 312.5 MB in the beginning and 6.3 GB in the end (delta: 6.0 GB). Free memory was 259.0 MB in the beginning and 922.5 MB in the end (delta: -663.6 MB). Peak memory consumption was 5.4 GB. Max. memory is 8.0 GB. [2021-10-13 22:58:43,549 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 189.8 MB. Free memory was 150.3 MB in the beginning and 150.2 MB in the end (delta: 125.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 357.78 ms. Allocated memory was 189.8 MB in the beginning and 312.5 MB in the end (delta: 122.7 MB). Free memory was 132.3 MB in the beginning and 275.2 MB in the end (delta: -142.9 MB). Peak memory consumption was 8.2 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 44.46 ms. Allocated memory is still 312.5 MB. Free memory was 275.2 MB in the beginning and 273.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 29.81 ms. Allocated memory is still 312.5 MB. Free memory was 273.1 MB in the beginning and 272.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 232.70 ms. Allocated memory is still 312.5 MB. Free memory was 272.1 MB in the beginning and 259.5 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 784063.39 ms. Allocated memory was 312.5 MB in the beginning and 6.3 GB in the end (delta: 6.0 GB). Free memory was 259.0 MB in the beginning and 922.5 MB in the end (delta: -663.6 MB). Peak memory consumption was 5.4 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 731]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (25states, 55/68 universal loopers) in iteration 83,while PetriNetUnfolder was constructing finite prefix that currently has 25376 conditions, 2348 events (151/2347 cut-off events. For 368270/368399 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 32917 event pairs, 0 based on Foata normal form. 100/2668 useless extension candidates. Maximal degree in co-relation 24998. Up to 274 conditions per place.). - TimeoutResultAtElement [Line: 723]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (25states, 55/68 universal loopers) in iteration 83,while PetriNetUnfolder was constructing finite prefix that currently has 25376 conditions, 2348 events (151/2347 cut-off events. For 368270/368399 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 32917 event pairs, 0 based on Foata normal form. 100/2668 useless extension candidates. Maximal degree in co-relation 24998. Up to 274 conditions per place.). - TimeoutResultAtElement [Line: 722]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (25states, 55/68 universal loopers) in iteration 83,while PetriNetUnfolder was constructing finite prefix that currently has 25376 conditions, 2348 events (151/2347 cut-off events. For 368270/368399 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 32917 event pairs, 0 based on Foata normal form. 100/2668 useless extension candidates. Maximal degree in co-relation 24998. Up to 274 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 88 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 19.4ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 783960.6ms, OverallIterations: 83, TraceHistogramMax: 8, EmptinessCheckTime: 0.0ms, AutomataDifference: 637917.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 39.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 489 SDtfs, 4519 SDslu, 1168 SDs, 0 SdLazy, 15902 SolverSat, 5762 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 18263.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8015 GetRequests, 4168 SyntacticMatches, 7 SemanticMatches, 3840 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77946 ImplicationChecksByTransitivity, 51726.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=275261occurred in iteration=82, InterpolantAutomatonStates: 3226, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 660.9ms SsaConstructionTime, 1513.4ms SatisfiabilityAnalysisTime, 40428.6ms InterpolantComputationTime, 9763 NumberOfCodeBlocks, 9763 NumberOfCodeBlocksAsserted, 312 NumberOfCheckSat, 9604 ConstructedInterpolants, 9 QuantifiedInterpolants, 84354 SizeOfPredicates, 152 NumberOfNonLiveVariables, 11748 ConjunctsInSsa, 1016 ConjunctsInUnsatCore, 159 InterpolantComputations, 7 PerfectInterpolantSequences, 0/5340 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown