/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-231806ee773fbd0554de777ff4074f5592c67ff4-231806e [2021-10-13 22:46:35,782 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 22:46:35,791 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 22:46:35,838 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 22:46:35,839 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 22:46:35,842 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 22:46:35,845 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 22:46:35,852 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 22:46:35,853 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 22:46:35,859 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 22:46:35,859 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 22:46:35,860 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 22:46:35,860 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 22:46:35,861 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 22:46:35,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 22:46:35,863 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 22:46:35,863 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 22:46:35,864 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 22:46:35,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 22:46:35,867 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 22:46:35,868 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 22:46:35,879 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 22:46:35,881 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 22:46:35,883 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 22:46:35,893 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-13 22:46:35,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 22:46:35,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 22:46:35,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 22:46:35,904 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 22:46:35,941 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 22:46:35,941 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 22:46:35,942 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 22:46:35,942 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 22:46:35,943 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 22:46:35,943 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 22:46:35,943 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 22:46:35,943 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 22:46:35,943 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 22:46:35,943 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 22:46:35,944 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 22:46:35,944 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 22:46:35,944 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 22:46:35,944 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 22:46:35,944 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 22:46:35,945 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 22:46:35,945 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 22:46:35,945 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 22:46:35,945 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 22:46:35,945 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-10-13 22:46:35,945 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 22:46:35,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 22:46:35,945 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 22:46:35,946 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 22:46:35,946 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 22:46:35,946 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 22:46:35,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 22:46:35,947 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-13 22:46:35,947 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-13 22:46:35,947 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-13 22:46:36,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 22:46:36,195 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 22:46:36,197 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 22:46:36,198 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 22:46:36,198 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 22:46:36,199 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-2.i [2021-10-13 22:46:36,278 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4d8980c0/dfb4ab95d5154643872cb72bd1b20d6f/FLAGd97c4eb78 [2021-10-13 22:46:36,663 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 22:46:36,664 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-2.i [2021-10-13 22:46:36,680 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4d8980c0/dfb4ab95d5154643872cb72bd1b20d6f/FLAGd97c4eb78 [2021-10-13 22:46:36,692 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4d8980c0/dfb4ab95d5154643872cb72bd1b20d6f [2021-10-13 22:46:36,694 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 22:46:36,695 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 22:46:36,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 22:46:36,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 22:46:36,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 22:46:36,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:46:36" (1/1) ... [2021-10-13 22:46:36,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@109383d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:36, skipping insertion in model container [2021-10-13 22:46:36,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:46:36" (1/1) ... [2021-10-13 22:46:36,718 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 22:46:36,768 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 22:46:37,087 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-2.i[30963,30976] [2021-10-13 22:46:37,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 22:46:37,097 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 22:46:37,130 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-2.i[30963,30976] [2021-10-13 22:46:37,138 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 22:46:37,170 INFO L208 MainTranslator]: Completed translation [2021-10-13 22:46:37,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:37 WrapperNode [2021-10-13 22:46:37,171 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 22:46:37,173 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 22:46:37,173 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 22:46:37,173 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 22:46:37,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:37" (1/1) ... [2021-10-13 22:46:37,204 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:37" (1/1) ... [2021-10-13 22:46:37,222 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 22:46:37,223 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 22:46:37,223 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 22:46:37,223 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 22:46:37,229 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:37" (1/1) ... [2021-10-13 22:46:37,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:37" (1/1) ... [2021-10-13 22:46:37,235 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:37" (1/1) ... [2021-10-13 22:46:37,235 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:37" (1/1) ... [2021-10-13 22:46:37,250 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:37" (1/1) ... [2021-10-13 22:46:37,252 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:37" (1/1) ... [2021-10-13 22:46:37,254 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:37" (1/1) ... [2021-10-13 22:46:37,256 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 22:46:37,256 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 22:46:37,256 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 22:46:37,256 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 22:46:37,262 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:37" (1/1) ... [2021-10-13 22:46:37,269 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 22:46:37,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:37,295 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 22:46:37,309 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 22:46:37,334 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-10-13 22:46:37,334 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-10-13 22:46:37,334 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-10-13 22:46:37,336 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-10-13 22:46:37,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 22:46:37,336 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-13 22:46:37,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 22:46:37,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 22:46:37,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 22:46:37,336 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-13 22:46:37,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 22:46:37,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 22:46:37,338 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 22:46:37,645 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 22:46:37,645 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-13 22:46:37,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:46:37 BoogieIcfgContainer [2021-10-13 22:46:37,647 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 22:46:37,648 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 22:46:37,648 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 22:46:37,652 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 22:46:37,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:46:36" (1/3) ... [2021-10-13 22:46:37,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aebe668 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:46:37, skipping insertion in model container [2021-10-13 22:46:37,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:37" (2/3) ... [2021-10-13 22:46:37,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aebe668 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:46:37, skipping insertion in model container [2021-10-13 22:46:37,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:46:37" (3/3) ... [2021-10-13 22:46:37,656 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2021-10-13 22:46:37,661 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 22:46:37,661 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 22:46:37,662 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-13 22:46:37,685 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,685 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,685 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,685 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,686 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,686 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,686 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,686 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,687 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,687 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,687 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,688 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,688 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,688 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,688 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,688 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,688 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,688 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,689 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,689 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,689 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,689 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,690 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,690 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,690 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,690 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,690 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,691 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,691 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,691 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,691 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,691 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,692 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,692 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,693 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,693 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,693 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,693 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,693 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,693 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,693 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,694 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,694 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,694 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,694 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,694 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,695 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,695 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,695 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,695 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,695 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,695 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,695 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,695 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,697 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,697 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,702 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,702 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,702 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,702 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,702 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,703 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,708 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,708 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,708 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,709 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,709 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,709 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 22:46:37,711 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-10-13 22:46:37,759 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 22:46:37,765 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 22:46:37,765 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-13 22:46:37,784 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 68 places, 66 transitions, 142 flow [2021-10-13 22:46:37,823 INFO L129 PetriNetUnfolder]: 5/64 cut-off events. [2021-10-13 22:46:37,824 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-13 22:46:37,828 INFO L84 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 5/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 65 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2021-10-13 22:46:37,829 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 66 transitions, 142 flow [2021-10-13 22:46:37,833 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 64 transitions, 134 flow [2021-10-13 22:46:37,853 INFO L129 PetriNetUnfolder]: 3/52 cut-off events. [2021-10-13 22:46:37,853 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-13 22:46:37,854 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:37,854 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 22:46:37,855 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:37,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:37,860 INFO L82 PathProgramCache]: Analyzing trace with hash 2112281486, now seen corresponding path program 1 times [2021-10-13 22:46:37,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:37,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263694817] [2021-10-13 22:46:37,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:37,868 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:38,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:38,256 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 22:46:38,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:38,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263694817] [2021-10-13 22:46:38,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263694817] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 22:46:38,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 22:46:38,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 22:46:38,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255036533] [2021-10-13 22:46:38,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 22:46:38,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:38,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 22:46:38,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-13 22:46:38,288 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:46:38,295 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 54.0) internal successors, (324), 6 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:38,296 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:38,296 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:46:38,297 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:38,473 INFO L129 PetriNetUnfolder]: 44/194 cut-off events. [2021-10-13 22:46:38,474 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-13 22:46:38,475 INFO L84 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 194 events. 44/194 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 723 event pairs, 3 based on Foata normal form. 47/223 useless extension candidates. Maximal degree in co-relation 243. Up to 29 conditions per place. [2021-10-13 22:46:38,478 INFO L132 encePairwiseOnDemand]: 55/66 looper letters, 11 selfloop transitions, 9 changer transitions 23/87 dead transitions. [2021-10-13 22:46:38,478 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 87 transitions, 252 flow [2021-10-13 22:46:38,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 22:46:38,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-13 22:46:38,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 590 transitions. [2021-10-13 22:46:38,498 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8939393939393939 [2021-10-13 22:46:38,499 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 590 transitions. [2021-10-13 22:46:38,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 590 transitions. [2021-10-13 22:46:38,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:38,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 590 transitions. [2021-10-13 22:46:38,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 59.0) internal successors, (590), 10 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:38,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 66.0) internal successors, (726), 11 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:38,518 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 66.0) internal successors, (726), 11 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:38,519 INFO L186 Difference]: Start difference. First operand has 66 places, 64 transitions, 134 flow. Second operand 10 states and 590 transitions. [2021-10-13 22:46:38,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 87 transitions, 252 flow [2021-10-13 22:46:38,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 87 transitions, 250 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-13 22:46:38,529 INFO L242 Difference]: Finished difference. Result has 79 places, 61 transitions, 175 flow [2021-10-13 22:46:38,530 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=175, PETRI_PLACES=79, PETRI_TRANSITIONS=61} [2021-10-13 22:46:38,531 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 13 predicate places. [2021-10-13 22:46:38,532 INFO L470 AbstractCegarLoop]: Abstraction has has 79 places, 61 transitions, 175 flow [2021-10-13 22:46:38,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.0) internal successors, (324), 6 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:38,532 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:38,532 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:46:38,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 22:46:38,533 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:38,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:38,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1447548911, now seen corresponding path program 1 times [2021-10-13 22:46:38,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:38,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082510945] [2021-10-13 22:46:38,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:38,534 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:38,690 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 22:46:38,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:38,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082510945] [2021-10-13 22:46:38,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082510945] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 22:46:38,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 22:46:38,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 22:46:38,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990978568] [2021-10-13 22:46:38,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 22:46:38,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:38,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 22:46:38,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-13 22:46:38,694 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:46:38,694 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 61 transitions, 175 flow. Second operand has 6 states, 6 states have (on average 54.166666666666664) internal successors, (325), 6 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:38,694 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:38,695 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:46:38,695 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:38,807 INFO L129 PetriNetUnfolder]: 25/130 cut-off events. [2021-10-13 22:46:38,808 INFO L130 PetriNetUnfolder]: For 64/72 co-relation queries the response was YES. [2021-10-13 22:46:38,809 INFO L84 FinitePrefix]: Finished finitePrefix Result has 242 conditions, 130 events. 25/130 cut-off events. For 64/72 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 343 event pairs, 0 based on Foata normal form. 7/124 useless extension candidates. Maximal degree in co-relation 206. Up to 29 conditions per place. [2021-10-13 22:46:38,810 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 13 selfloop transitions, 9 changer transitions 5/71 dead transitions. [2021-10-13 22:46:38,810 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 71 transitions, 271 flow [2021-10-13 22:46:38,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 22:46:38,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-13 22:46:38,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 394 transitions. [2021-10-13 22:46:38,812 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8528138528138528 [2021-10-13 22:46:38,812 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 394 transitions. [2021-10-13 22:46:38,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 394 transitions. [2021-10-13 22:46:38,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:38,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 394 transitions. [2021-10-13 22:46:38,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 56.285714285714285) internal successors, (394), 7 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:38,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 66.0) internal successors, (528), 8 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:38,815 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 66.0) internal successors, (528), 8 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:38,815 INFO L186 Difference]: Start difference. First operand has 79 places, 61 transitions, 175 flow. Second operand 7 states and 394 transitions. [2021-10-13 22:46:38,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 71 transitions, 271 flow [2021-10-13 22:46:38,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 71 transitions, 263 flow, removed 4 selfloop flow, removed 4 redundant places. [2021-10-13 22:46:38,819 INFO L242 Difference]: Finished difference. Result has 73 places, 64 transitions, 214 flow [2021-10-13 22:46:38,821 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=214, PETRI_PLACES=73, PETRI_TRANSITIONS=64} [2021-10-13 22:46:38,821 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 7 predicate places. [2021-10-13 22:46:38,821 INFO L470 AbstractCegarLoop]: Abstraction has has 73 places, 64 transitions, 214 flow [2021-10-13 22:46:38,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.166666666666664) internal successors, (325), 6 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:38,822 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:38,822 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:46:38,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 22:46:38,822 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:38,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:38,823 INFO L82 PathProgramCache]: Analyzing trace with hash 263941995, now seen corresponding path program 1 times [2021-10-13 22:46:38,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:38,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548172153] [2021-10-13 22:46:38,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:38,824 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:38,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:38,929 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 22:46:38,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:38,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548172153] [2021-10-13 22:46:38,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548172153] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 22:46:38,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 22:46:38,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 22:46:38,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301678949] [2021-10-13 22:46:38,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 22:46:38,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:38,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 22:46:38,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-13 22:46:38,932 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:46:38,933 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 64 transitions, 214 flow. Second operand has 6 states, 6 states have (on average 54.166666666666664) internal successors, (325), 6 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:38,933 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:38,933 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:46:38,933 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:39,022 INFO L129 PetriNetUnfolder]: 35/182 cut-off events. [2021-10-13 22:46:39,022 INFO L130 PetriNetUnfolder]: For 116/133 co-relation queries the response was YES. [2021-10-13 22:46:39,024 INFO L84 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 182 events. 35/182 cut-off events. For 116/133 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 584 event pairs, 0 based on Foata normal form. 20/185 useless extension candidates. Maximal degree in co-relation 317. Up to 33 conditions per place. [2021-10-13 22:46:39,025 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 20 selfloop transitions, 11 changer transitions 8/83 dead transitions. [2021-10-13 22:46:39,025 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 83 transitions, 394 flow [2021-10-13 22:46:39,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 22:46:39,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-13 22:46:39,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 509 transitions. [2021-10-13 22:46:39,035 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8569023569023569 [2021-10-13 22:46:39,035 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 509 transitions. [2021-10-13 22:46:39,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 509 transitions. [2021-10-13 22:46:39,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:39,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 509 transitions. [2021-10-13 22:46:39,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 56.55555555555556) internal successors, (509), 9 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:39,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:39,039 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:39,039 INFO L186 Difference]: Start difference. First operand has 73 places, 64 transitions, 214 flow. Second operand 9 states and 509 transitions. [2021-10-13 22:46:39,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 83 transitions, 394 flow [2021-10-13 22:46:39,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 83 transitions, 371 flow, removed 9 selfloop flow, removed 3 redundant places. [2021-10-13 22:46:39,048 INFO L242 Difference]: Finished difference. Result has 83 places, 69 transitions, 283 flow [2021-10-13 22:46:39,051 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=283, PETRI_PLACES=83, PETRI_TRANSITIONS=69} [2021-10-13 22:46:39,051 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 17 predicate places. [2021-10-13 22:46:39,055 INFO L470 AbstractCegarLoop]: Abstraction has has 83 places, 69 transitions, 283 flow [2021-10-13 22:46:39,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.166666666666664) internal successors, (325), 6 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:39,055 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:39,056 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:46:39,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 22:46:39,056 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:39,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:39,056 INFO L82 PathProgramCache]: Analyzing trace with hash 482644881, now seen corresponding path program 2 times [2021-10-13 22:46:39,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:39,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450993238] [2021-10-13 22:46:39,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:39,057 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:39,185 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 22:46:39,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:39,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450993238] [2021-10-13 22:46:39,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450993238] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 22:46:39,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 22:46:39,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 22:46:39,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827997477] [2021-10-13 22:46:39,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 22:46:39,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:39,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 22:46:39,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-13 22:46:39,187 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:46:39,188 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 69 transitions, 283 flow. Second operand has 6 states, 6 states have (on average 54.166666666666664) internal successors, (325), 6 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:39,188 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:39,188 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:46:39,188 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:39,285 INFO L129 PetriNetUnfolder]: 28/171 cut-off events. [2021-10-13 22:46:39,286 INFO L130 PetriNetUnfolder]: For 239/271 co-relation queries the response was YES. [2021-10-13 22:46:39,287 INFO L84 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 171 events. 28/171 cut-off events. For 239/271 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 551 event pairs, 0 based on Foata normal form. 28/183 useless extension candidates. Maximal degree in co-relation 346. Up to 30 conditions per place. [2021-10-13 22:46:39,288 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 16 selfloop transitions, 12 changer transitions 11/83 dead transitions. [2021-10-13 22:46:39,288 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 83 transitions, 471 flow [2021-10-13 22:46:39,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 22:46:39,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-13 22:46:39,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 503 transitions. [2021-10-13 22:46:39,290 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8468013468013468 [2021-10-13 22:46:39,290 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 503 transitions. [2021-10-13 22:46:39,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 503 transitions. [2021-10-13 22:46:39,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:39,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 503 transitions. [2021-10-13 22:46:39,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 55.888888888888886) internal successors, (503), 9 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:39,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:39,293 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:39,293 INFO L186 Difference]: Start difference. First operand has 83 places, 69 transitions, 283 flow. Second operand 9 states and 503 transitions. [2021-10-13 22:46:39,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 83 transitions, 471 flow [2021-10-13 22:46:39,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 83 transitions, 451 flow, removed 6 selfloop flow, removed 3 redundant places. [2021-10-13 22:46:39,302 INFO L242 Difference]: Finished difference. Result has 90 places, 70 transitions, 326 flow [2021-10-13 22:46:39,302 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=326, PETRI_PLACES=90, PETRI_TRANSITIONS=70} [2021-10-13 22:46:39,303 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 24 predicate places. [2021-10-13 22:46:39,303 INFO L470 AbstractCegarLoop]: Abstraction has has 90 places, 70 transitions, 326 flow [2021-10-13 22:46:39,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.166666666666664) internal successors, (325), 6 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:39,303 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:39,303 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:46:39,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 22:46:39,304 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:39,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:39,304 INFO L82 PathProgramCache]: Analyzing trace with hash 557630062, now seen corresponding path program 1 times [2021-10-13 22:46:39,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:39,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542123558] [2021-10-13 22:46:39,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:39,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:39,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:39,376 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 22:46:39,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:39,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542123558] [2021-10-13 22:46:39,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542123558] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 22:46:39,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 22:46:39,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-13 22:46:39,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503214836] [2021-10-13 22:46:39,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 22:46:39,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:39,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 22:46:39,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-13 22:46:39,378 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:46:39,379 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 70 transitions, 326 flow. Second operand has 7 states, 7 states have (on average 54.142857142857146) internal successors, (379), 7 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:39,379 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:39,379 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:46:39,379 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:39,473 INFO L129 PetriNetUnfolder]: 41/214 cut-off events. [2021-10-13 22:46:39,473 INFO L130 PetriNetUnfolder]: For 570/604 co-relation queries the response was YES. [2021-10-13 22:46:39,474 INFO L84 FinitePrefix]: Finished finitePrefix Result has 556 conditions, 214 events. 41/214 cut-off events. For 570/604 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 743 event pairs, 0 based on Foata normal form. 20/215 useless extension candidates. Maximal degree in co-relation 506. Up to 48 conditions per place. [2021-10-13 22:46:39,476 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 21 selfloop transitions, 21 changer transitions 8/94 dead transitions. [2021-10-13 22:46:39,476 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 94 transitions, 650 flow [2021-10-13 22:46:39,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 22:46:39,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-13 22:46:39,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 620 transitions. [2021-10-13 22:46:39,478 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8539944903581267 [2021-10-13 22:46:39,478 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 620 transitions. [2021-10-13 22:46:39,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 620 transitions. [2021-10-13 22:46:39,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:39,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 620 transitions. [2021-10-13 22:46:39,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 56.36363636363637) internal successors, (620), 11 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:39,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 66.0) internal successors, (792), 12 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:39,481 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 66.0) internal successors, (792), 12 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:39,481 INFO L186 Difference]: Start difference. First operand has 90 places, 70 transitions, 326 flow. Second operand 11 states and 620 transitions. [2021-10-13 22:46:39,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 94 transitions, 650 flow [2021-10-13 22:46:39,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 94 transitions, 534 flow, removed 45 selfloop flow, removed 10 redundant places. [2021-10-13 22:46:39,485 INFO L242 Difference]: Finished difference. Result has 94 places, 76 transitions, 411 flow [2021-10-13 22:46:39,486 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=411, PETRI_PLACES=94, PETRI_TRANSITIONS=76} [2021-10-13 22:46:39,486 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 28 predicate places. [2021-10-13 22:46:39,486 INFO L470 AbstractCegarLoop]: Abstraction has has 94 places, 76 transitions, 411 flow [2021-10-13 22:46:39,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 54.142857142857146) internal successors, (379), 7 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:39,486 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:39,487 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:46:39,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 22:46:39,487 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:39,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:39,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1889861268, now seen corresponding path program 2 times [2021-10-13 22:46:39,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:39,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637301714] [2021-10-13 22:46:39,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:39,488 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:39,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:39,558 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 22:46:39,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:39,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637301714] [2021-10-13 22:46:39,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637301714] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 22:46:39,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 22:46:39,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-13 22:46:39,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486931191] [2021-10-13 22:46:39,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 22:46:39,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:39,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 22:46:39,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-13 22:46:39,560 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:46:39,561 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 76 transitions, 411 flow. Second operand has 7 states, 7 states have (on average 54.142857142857146) internal successors, (379), 7 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:39,561 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:39,561 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:46:39,561 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:39,715 INFO L129 PetriNetUnfolder]: 36/206 cut-off events. [2021-10-13 22:46:39,716 INFO L130 PetriNetUnfolder]: For 803/857 co-relation queries the response was YES. [2021-10-13 22:46:39,717 INFO L84 FinitePrefix]: Finished finitePrefix Result has 594 conditions, 206 events. 36/206 cut-off events. For 803/857 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 748 event pairs, 0 based on Foata normal form. 29/216 useless extension candidates. Maximal degree in co-relation 550. Up to 44 conditions per place. [2021-10-13 22:46:39,718 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 19 selfloop transitions, 23 changer transitions 11/97 dead transitions. [2021-10-13 22:46:39,718 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 97 transitions, 781 flow [2021-10-13 22:46:39,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 22:46:39,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-13 22:46:39,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 670 transitions. [2021-10-13 22:46:39,720 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8459595959595959 [2021-10-13 22:46:39,720 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 670 transitions. [2021-10-13 22:46:39,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 670 transitions. [2021-10-13 22:46:39,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:39,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 670 transitions. [2021-10-13 22:46:39,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 55.833333333333336) internal successors, (670), 12 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:39,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 66.0) internal successors, (858), 13 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:39,724 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 66.0) internal successors, (858), 13 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:39,724 INFO L186 Difference]: Start difference. First operand has 94 places, 76 transitions, 411 flow. Second operand 12 states and 670 transitions. [2021-10-13 22:46:39,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 97 transitions, 781 flow [2021-10-13 22:46:39,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 97 transitions, 723 flow, removed 20 selfloop flow, removed 5 redundant places. [2021-10-13 22:46:39,729 INFO L242 Difference]: Finished difference. Result has 103 places, 79 transitions, 499 flow [2021-10-13 22:46:39,729 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=499, PETRI_PLACES=103, PETRI_TRANSITIONS=79} [2021-10-13 22:46:39,729 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 37 predicate places. [2021-10-13 22:46:39,729 INFO L470 AbstractCegarLoop]: Abstraction has has 103 places, 79 transitions, 499 flow [2021-10-13 22:46:39,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 54.142857142857146) internal successors, (379), 7 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:39,730 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:39,730 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:46:39,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-13 22:46:39,730 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:39,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:39,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1339160469, now seen corresponding path program 1 times [2021-10-13 22:46:39,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:39,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479487899] [2021-10-13 22:46:39,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:39,747 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:39,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:39,865 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 22:46:39,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:39,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479487899] [2021-10-13 22:46:39,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479487899] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:39,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873350337] [2021-10-13 22:46:39,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:39,866 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:39,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:39,871 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 22:46:39,903 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 22:46:39,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:39,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 22:46:39,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:40,194 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 22:46:40,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873350337] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:40,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:40,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-10-13 22:46:40,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688032541] [2021-10-13 22:46:40,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 22:46:40,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:40,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 22:46:40,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-13 22:46:40,197 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:46:40,198 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 79 transitions, 499 flow. Second operand has 9 states, 9 states have (on average 54.22222222222222) internal successors, (488), 9 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:40,198 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:40,198 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:46:40,198 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:40,310 INFO L129 PetriNetUnfolder]: 36/213 cut-off events. [2021-10-13 22:46:40,310 INFO L130 PetriNetUnfolder]: For 1073/1130 co-relation queries the response was YES. [2021-10-13 22:46:40,312 INFO L84 FinitePrefix]: Finished finitePrefix Result has 654 conditions, 213 events. 36/213 cut-off events. For 1073/1130 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 734 event pairs, 0 based on Foata normal form. 35/227 useless extension candidates. Maximal degree in co-relation 604. Up to 44 conditions per place. [2021-10-13 22:46:40,313 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 28 selfloop transitions, 13 changer transitions 8/93 dead transitions. [2021-10-13 22:46:40,313 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 93 transitions, 807 flow [2021-10-13 22:46:40,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 22:46:40,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-13 22:46:40,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 615 transitions. [2021-10-13 22:46:40,315 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8471074380165289 [2021-10-13 22:46:40,316 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 615 transitions. [2021-10-13 22:46:40,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 615 transitions. [2021-10-13 22:46:40,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:40,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 615 transitions. [2021-10-13 22:46:40,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 55.90909090909091) internal successors, (615), 11 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:40,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 66.0) internal successors, (792), 12 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:40,319 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 66.0) internal successors, (792), 12 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:40,319 INFO L186 Difference]: Start difference. First operand has 103 places, 79 transitions, 499 flow. Second operand 11 states and 615 transitions. [2021-10-13 22:46:40,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 93 transitions, 807 flow [2021-10-13 22:46:40,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 93 transitions, 734 flow, removed 19 selfloop flow, removed 9 redundant places. [2021-10-13 22:46:40,327 INFO L242 Difference]: Finished difference. Result has 106 places, 81 transitions, 514 flow [2021-10-13 22:46:40,327 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=514, PETRI_PLACES=106, PETRI_TRANSITIONS=81} [2021-10-13 22:46:40,327 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 40 predicate places. [2021-10-13 22:46:40,327 INFO L470 AbstractCegarLoop]: Abstraction has has 106 places, 81 transitions, 514 flow [2021-10-13 22:46:40,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 54.22222222222222) internal successors, (488), 9 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:40,328 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:40,328 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:46:40,352 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 22:46:40,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:40,548 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:40,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:40,548 INFO L82 PathProgramCache]: Analyzing trace with hash 466216687, now seen corresponding path program 2 times [2021-10-13 22:46:40,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:40,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516961171] [2021-10-13 22:46:40,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:40,548 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:40,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:40,653 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 22:46:40,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:40,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516961171] [2021-10-13 22:46:40,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516961171] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:40,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956346805] [2021-10-13 22:46:40,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:46:40,654 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:40,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:40,655 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 22:46:40,679 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 22:46:40,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:46:40,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:40,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 22:46:40,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:40,934 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 22:46:40,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956346805] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:40,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:40,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-10-13 22:46:40,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561742565] [2021-10-13 22:46:40,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 22:46:40,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:40,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 22:46:40,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-13 22:46:40,936 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:46:40,937 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 81 transitions, 514 flow. Second operand has 10 states, 10 states have (on average 54.3) internal successors, (543), 10 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:40,937 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:40,937 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:46:40,937 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:41,084 INFO L129 PetriNetUnfolder]: 42/245 cut-off events. [2021-10-13 22:46:41,085 INFO L130 PetriNetUnfolder]: For 1540/1608 co-relation queries the response was YES. [2021-10-13 22:46:41,086 INFO L84 FinitePrefix]: Finished finitePrefix Result has 803 conditions, 245 events. 42/245 cut-off events. For 1540/1608 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 964 event pairs, 0 based on Foata normal form. 35/256 useless extension candidates. Maximal degree in co-relation 748. Up to 54 conditions per place. [2021-10-13 22:46:41,089 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 28 selfloop transitions, 21 changer transitions 8/101 dead transitions. [2021-10-13 22:46:41,089 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 101 transitions, 952 flow [2021-10-13 22:46:41,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 22:46:41,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-13 22:46:41,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 782 transitions. [2021-10-13 22:46:41,091 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8463203463203464 [2021-10-13 22:46:41,091 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 782 transitions. [2021-10-13 22:46:41,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 782 transitions. [2021-10-13 22:46:41,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:41,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 782 transitions. [2021-10-13 22:46:41,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 55.857142857142854) internal successors, (782), 14 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:41,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 66.0) internal successors, (990), 15 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:41,096 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 66.0) internal successors, (990), 15 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:41,096 INFO L186 Difference]: Start difference. First operand has 106 places, 81 transitions, 514 flow. Second operand 14 states and 782 transitions. [2021-10-13 22:46:41,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 101 transitions, 952 flow [2021-10-13 22:46:41,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 101 transitions, 858 flow, removed 36 selfloop flow, removed 8 redundant places. [2021-10-13 22:46:41,103 INFO L242 Difference]: Finished difference. Result has 115 places, 88 transitions, 629 flow [2021-10-13 22:46:41,103 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=629, PETRI_PLACES=115, PETRI_TRANSITIONS=88} [2021-10-13 22:46:41,103 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 49 predicate places. [2021-10-13 22:46:41,104 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 88 transitions, 629 flow [2021-10-13 22:46:41,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 54.3) internal successors, (543), 10 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:41,104 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:41,104 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:46:41,127 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 22:46:41,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-13 22:46:41,327 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:41,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:41,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1190358857, now seen corresponding path program 3 times [2021-10-13 22:46:41,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:41,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369357338] [2021-10-13 22:46:41,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:41,328 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:41,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:41,409 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 22:46:41,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:41,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369357338] [2021-10-13 22:46:41,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369357338] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:41,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550015472] [2021-10-13 22:46:41,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:46:41,410 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:41,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:41,411 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 22:46:41,444 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 22:46:41,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 22:46:41,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:41,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 22:46:41,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:41,687 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 22:46:41,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550015472] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:41,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:41,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-10-13 22:46:41,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696037875] [2021-10-13 22:46:41,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 22:46:41,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:41,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 22:46:41,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-13 22:46:41,691 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:46:41,692 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 88 transitions, 629 flow. Second operand has 9 states, 9 states have (on average 54.22222222222222) internal successors, (488), 9 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:41,692 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:41,692 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:46:41,692 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:41,867 INFO L129 PetriNetUnfolder]: 57/320 cut-off events. [2021-10-13 22:46:41,867 INFO L130 PetriNetUnfolder]: For 2724/2816 co-relation queries the response was YES. [2021-10-13 22:46:41,868 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1173 conditions, 320 events. 57/320 cut-off events. For 2724/2816 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1464 event pairs, 0 based on Foata normal form. 40/328 useless extension candidates. Maximal degree in co-relation 1112. Up to 74 conditions per place. [2021-10-13 22:46:41,870 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 34 selfloop transitions, 26 changer transitions 8/112 dead transitions. [2021-10-13 22:46:41,870 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 112 transitions, 1217 flow [2021-10-13 22:46:41,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 22:46:41,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-13 22:46:41,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 842 transitions. [2021-10-13 22:46:41,873 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8505050505050505 [2021-10-13 22:46:41,873 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 842 transitions. [2021-10-13 22:46:41,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 842 transitions. [2021-10-13 22:46:41,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:41,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 842 transitions. [2021-10-13 22:46:41,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 56.13333333333333) internal successors, (842), 15 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:41,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 66.0) internal successors, (1056), 16 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:41,877 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 66.0) internal successors, (1056), 16 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:41,877 INFO L186 Difference]: Start difference. First operand has 115 places, 88 transitions, 629 flow. Second operand 15 states and 842 transitions. [2021-10-13 22:46:41,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 112 transitions, 1217 flow [2021-10-13 22:46:41,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 112 transitions, 1085 flow, removed 60 selfloop flow, removed 6 redundant places. [2021-10-13 22:46:41,885 INFO L242 Difference]: Finished difference. Result has 127 places, 94 transitions, 765 flow [2021-10-13 22:46:41,886 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=567, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=765, PETRI_PLACES=127, PETRI_TRANSITIONS=94} [2021-10-13 22:46:41,886 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 61 predicate places. [2021-10-13 22:46:41,886 INFO L470 AbstractCegarLoop]: Abstraction has has 127 places, 94 transitions, 765 flow [2021-10-13 22:46:41,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 54.22222222222222) internal successors, (488), 9 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:41,886 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:41,887 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:46:41,914 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 22:46:42,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:42,108 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:42,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:42,108 INFO L82 PathProgramCache]: Analyzing trace with hash -2019400091, now seen corresponding path program 4 times [2021-10-13 22:46:42,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:42,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24744033] [2021-10-13 22:46:42,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:42,109 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:42,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:42,179 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 22:46:42,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:42,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24744033] [2021-10-13 22:46:42,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24744033] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:42,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923300379] [2021-10-13 22:46:42,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:46:42,180 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:42,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:42,181 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 22:46:42,182 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 22:46:42,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:46:42,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:42,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 22:46:42,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:42,435 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 22:46:42,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923300379] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:42,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:42,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-10-13 22:46:42,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348803542] [2021-10-13 22:46:42,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 22:46:42,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:42,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 22:46:42,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-13 22:46:42,438 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:46:42,439 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 94 transitions, 765 flow. Second operand has 10 states, 10 states have (on average 54.2) internal successors, (542), 10 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:42,439 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:42,439 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:46:42,439 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:42,668 INFO L129 PetriNetUnfolder]: 58/343 cut-off events. [2021-10-13 22:46:42,669 INFO L130 PetriNetUnfolder]: For 3986/4075 co-relation queries the response was YES. [2021-10-13 22:46:42,670 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1352 conditions, 343 events. 58/343 cut-off events. For 3986/4075 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1641 event pairs, 0 based on Foata normal form. 47/356 useless extension candidates. Maximal degree in co-relation 1287. Up to 76 conditions per place. [2021-10-13 22:46:42,672 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 30 selfloop transitions, 34 changer transitions 17/125 dead transitions. [2021-10-13 22:46:42,673 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 125 transitions, 1651 flow [2021-10-13 22:46:42,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 22:46:42,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-13 22:46:42,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1116 transitions. [2021-10-13 22:46:42,677 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8454545454545455 [2021-10-13 22:46:42,677 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1116 transitions. [2021-10-13 22:46:42,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1116 transitions. [2021-10-13 22:46:42,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:42,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1116 transitions. [2021-10-13 22:46:42,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 55.8) internal successors, (1116), 20 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:42,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 66.0) internal successors, (1386), 21 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:42,683 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 66.0) internal successors, (1386), 21 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:42,683 INFO L186 Difference]: Start difference. First operand has 127 places, 94 transitions, 765 flow. Second operand 20 states and 1116 transitions. [2021-10-13 22:46:42,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 125 transitions, 1651 flow [2021-10-13 22:46:42,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 125 transitions, 1431 flow, removed 93 selfloop flow, removed 10 redundant places. [2021-10-13 22:46:42,694 INFO L242 Difference]: Finished difference. Result has 143 places, 103 transitions, 975 flow [2021-10-13 22:46:42,695 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=975, PETRI_PLACES=143, PETRI_TRANSITIONS=103} [2021-10-13 22:46:42,696 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 77 predicate places. [2021-10-13 22:46:42,696 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 103 transitions, 975 flow [2021-10-13 22:46:42,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 54.2) internal successors, (542), 10 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:42,696 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:42,696 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:46:42,719 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 22:46:42,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:42,919 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:42,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:42,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1615124285, now seen corresponding path program 1 times [2021-10-13 22:46:42,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:42,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147224094] [2021-10-13 22:46:42,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:42,920 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:42,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:43,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:46:43,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:43,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147224094] [2021-10-13 22:46:43,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147224094] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:43,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597247574] [2021-10-13 22:46:43,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:43,001 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:43,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:43,002 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 22:46:43,039 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 22:46:43,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:43,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 22:46:43,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:43,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:46:43,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597247574] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:43,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:43,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-10-13 22:46:43,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47188298] [2021-10-13 22:46:43,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 22:46:43,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:43,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 22:46:43,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-13 22:46:43,311 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:46:43,312 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 103 transitions, 975 flow. Second operand has 9 states, 9 states have (on average 54.111111111111114) internal successors, (487), 9 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:43,312 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:43,312 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:46:43,312 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:43,457 INFO L129 PetriNetUnfolder]: 54/323 cut-off events. [2021-10-13 22:46:43,458 INFO L130 PetriNetUnfolder]: For 4100/4187 co-relation queries the response was YES. [2021-10-13 22:46:43,460 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1301 conditions, 323 events. 54/323 cut-off events. For 4100/4187 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1506 event pairs, 0 based on Foata normal form. 31/322 useless extension candidates. Maximal degree in co-relation 1228. Up to 70 conditions per place. [2021-10-13 22:46:43,462 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 45 selfloop transitions, 25 changer transitions 8/122 dead transitions. [2021-10-13 22:46:43,462 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 122 transitions, 1613 flow [2021-10-13 22:46:43,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 22:46:43,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-13 22:46:43,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 726 transitions. [2021-10-13 22:46:43,463 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8461538461538461 [2021-10-13 22:46:43,464 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 726 transitions. [2021-10-13 22:46:43,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 726 transitions. [2021-10-13 22:46:43,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:43,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 726 transitions. [2021-10-13 22:46:43,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 55.84615384615385) internal successors, (726), 13 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:43,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 66.0) internal successors, (924), 14 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:43,467 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 66.0) internal successors, (924), 14 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:43,467 INFO L186 Difference]: Start difference. First operand has 143 places, 103 transitions, 975 flow. Second operand 13 states and 726 transitions. [2021-10-13 22:46:43,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 122 transitions, 1613 flow [2021-10-13 22:46:43,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 122 transitions, 1374 flow, removed 105 selfloop flow, removed 13 redundant places. [2021-10-13 22:46:43,481 INFO L242 Difference]: Finished difference. Result has 142 places, 105 transitions, 890 flow [2021-10-13 22:46:43,481 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=890, PETRI_PLACES=142, PETRI_TRANSITIONS=105} [2021-10-13 22:46:43,481 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 76 predicate places. [2021-10-13 22:46:43,482 INFO L470 AbstractCegarLoop]: Abstraction has has 142 places, 105 transitions, 890 flow [2021-10-13 22:46:43,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 54.111111111111114) internal successors, (487), 9 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:43,482 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:43,482 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:46:43,507 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 22:46:43,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-13 22:46:43,703 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:43,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:43,704 INFO L82 PathProgramCache]: Analyzing trace with hash 70257965, now seen corresponding path program 2 times [2021-10-13 22:46:43,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:43,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752473379] [2021-10-13 22:46:43,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:43,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:43,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:43,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:46:43,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:43,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752473379] [2021-10-13 22:46:43,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752473379] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:43,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421867047] [2021-10-13 22:46:43,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:46:43,785 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:43,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:43,786 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 22:46:43,795 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 22:46:43,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:46:43,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:43,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 22:46:43,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:44,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:46:44,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421867047] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:44,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:44,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-10-13 22:46:44,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853124124] [2021-10-13 22:46:44,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 22:46:44,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:44,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 22:46:44,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-13 22:46:44,135 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:46:44,135 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 105 transitions, 890 flow. Second operand has 9 states, 9 states have (on average 54.111111111111114) internal successors, (487), 9 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:44,135 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:44,135 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:46:44,135 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:44,304 INFO L129 PetriNetUnfolder]: 69/418 cut-off events. [2021-10-13 22:46:44,304 INFO L130 PetriNetUnfolder]: For 5788/5870 co-relation queries the response was YES. [2021-10-13 22:46:44,307 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1695 conditions, 418 events. 69/418 cut-off events. For 5788/5870 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2172 event pairs, 0 based on Foata normal form. 36/414 useless extension candidates. Maximal degree in co-relation 1621. Up to 78 conditions per place. [2021-10-13 22:46:44,309 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 36 selfloop transitions, 45 changer transitions 8/133 dead transitions. [2021-10-13 22:46:44,309 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 133 transitions, 1808 flow [2021-10-13 22:46:44,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 22:46:44,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-13 22:46:44,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 895 transitions. [2021-10-13 22:46:44,311 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8475378787878788 [2021-10-13 22:46:44,311 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 895 transitions. [2021-10-13 22:46:44,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 895 transitions. [2021-10-13 22:46:44,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:44,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 895 transitions. [2021-10-13 22:46:44,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 55.9375) internal successors, (895), 16 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:44,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 66.0) internal successors, (1122), 17 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:44,315 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 66.0) internal successors, (1122), 17 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:44,315 INFO L186 Difference]: Start difference. First operand has 142 places, 105 transitions, 890 flow. Second operand 16 states and 895 transitions. [2021-10-13 22:46:44,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 133 transitions, 1808 flow [2021-10-13 22:46:44,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 133 transitions, 1634 flow, removed 66 selfloop flow, removed 10 redundant places. [2021-10-13 22:46:44,330 INFO L242 Difference]: Finished difference. Result has 151 places, 111 transitions, 1097 flow [2021-10-13 22:46:44,331 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1097, PETRI_PLACES=151, PETRI_TRANSITIONS=111} [2021-10-13 22:46:44,331 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 85 predicate places. [2021-10-13 22:46:44,331 INFO L470 AbstractCegarLoop]: Abstraction has has 151 places, 111 transitions, 1097 flow [2021-10-13 22:46:44,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 54.111111111111114) internal successors, (487), 9 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:44,331 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:44,331 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:46:44,356 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 22:46:44,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:44,548 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:44,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:44,548 INFO L82 PathProgramCache]: Analyzing trace with hash -245613985, now seen corresponding path program 3 times [2021-10-13 22:46:44,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:44,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466346932] [2021-10-13 22:46:44,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:44,548 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:44,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:44,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:46:44,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:44,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466346932] [2021-10-13 22:46:44,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466346932] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:44,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318841794] [2021-10-13 22:46:44,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:46:44,634 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:44,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:44,635 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 22:46:44,668 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 22:46:44,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 22:46:44,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:44,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 22:46:44,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:44,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:46:44,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318841794] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:44,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:44,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-10-13 22:46:44,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275360594] [2021-10-13 22:46:44,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 22:46:44,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:44,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 22:46:44,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-13 22:46:44,985 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:46:44,986 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 111 transitions, 1097 flow. Second operand has 10 states, 10 states have (on average 54.2) internal successors, (542), 10 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:44,986 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:44,986 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:46:44,986 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:45,205 INFO L129 PetriNetUnfolder]: 64/390 cut-off events. [2021-10-13 22:46:45,206 INFO L130 PetriNetUnfolder]: For 6648/6766 co-relation queries the response was YES. [2021-10-13 22:46:45,208 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1682 conditions, 390 events. 64/390 cut-off events. For 6648/6766 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2002 event pairs, 0 based on Foata normal form. 44/396 useless extension candidates. Maximal degree in co-relation 1604. Up to 74 conditions per place. [2021-10-13 22:46:45,211 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 30 selfloop transitions, 51 changer transitions 11/136 dead transitions. [2021-10-13 22:46:45,211 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 136 transitions, 2053 flow [2021-10-13 22:46:45,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 22:46:45,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-13 22:46:45,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 892 transitions. [2021-10-13 22:46:45,212 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8446969696969697 [2021-10-13 22:46:45,213 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 892 transitions. [2021-10-13 22:46:45,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 892 transitions. [2021-10-13 22:46:45,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:45,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 892 transitions. [2021-10-13 22:46:45,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 55.75) internal successors, (892), 16 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:45,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 66.0) internal successors, (1122), 17 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:45,216 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 66.0) internal successors, (1122), 17 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:45,216 INFO L186 Difference]: Start difference. First operand has 151 places, 111 transitions, 1097 flow. Second operand 16 states and 892 transitions. [2021-10-13 22:46:45,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 136 transitions, 2053 flow [2021-10-13 22:46:45,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 136 transitions, 1794 flow, removed 101 selfloop flow, removed 11 redundant places. [2021-10-13 22:46:45,234 INFO L242 Difference]: Finished difference. Result has 158 places, 114 transitions, 1179 flow [2021-10-13 22:46:45,235 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1179, PETRI_PLACES=158, PETRI_TRANSITIONS=114} [2021-10-13 22:46:45,235 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 92 predicate places. [2021-10-13 22:46:45,235 INFO L470 AbstractCegarLoop]: Abstraction has has 158 places, 114 transitions, 1179 flow [2021-10-13 22:46:45,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 54.2) internal successors, (542), 10 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:45,235 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:45,235 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:46:45,274 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 22:46:45,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:45,455 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:45,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:45,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1609128234, now seen corresponding path program 4 times [2021-10-13 22:46:45,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:45,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386038474] [2021-10-13 22:46:45,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:45,456 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:45,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:45,554 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:46:45,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:45,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386038474] [2021-10-13 22:46:45,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386038474] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:45,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702194098] [2021-10-13 22:46:45,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:46:45,555 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:45,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:45,556 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 22:46:45,557 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 22:46:45,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:46:45,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:45,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 22:46:45,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:46,028 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 22:46:46,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702194098] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:46,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:46,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-10-13 22:46:46,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007326421] [2021-10-13 22:46:46,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 22:46:46,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:46,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 22:46:46,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-10-13 22:46:46,030 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:46:46,031 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 114 transitions, 1179 flow. Second operand has 11 states, 11 states have (on average 54.18181818181818) internal successors, (596), 11 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:46,031 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:46,031 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:46:46,031 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:46,185 INFO L129 PetriNetUnfolder]: 64/390 cut-off events. [2021-10-13 22:46:46,185 INFO L130 PetriNetUnfolder]: For 6283/6384 co-relation queries the response was YES. [2021-10-13 22:46:46,188 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1681 conditions, 390 events. 64/390 cut-off events. For 6283/6384 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1982 event pairs, 0 based on Foata normal form. 35/386 useless extension candidates. Maximal degree in co-relation 1600. Up to 87 conditions per place. [2021-10-13 22:46:46,190 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 63 selfloop transitions, 15 changer transitions 8/130 dead transitions. [2021-10-13 22:46:46,191 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 130 transitions, 1833 flow [2021-10-13 22:46:46,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 22:46:46,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-13 22:46:46,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 725 transitions. [2021-10-13 22:46:46,192 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.844988344988345 [2021-10-13 22:46:46,192 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 725 transitions. [2021-10-13 22:46:46,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 725 transitions. [2021-10-13 22:46:46,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:46,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 725 transitions. [2021-10-13 22:46:46,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 55.76923076923077) internal successors, (725), 13 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:46,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 66.0) internal successors, (924), 14 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:46,195 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 66.0) internal successors, (924), 14 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:46,195 INFO L186 Difference]: Start difference. First operand has 158 places, 114 transitions, 1179 flow. Second operand 13 states and 725 transitions. [2021-10-13 22:46:46,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 130 transitions, 1833 flow [2021-10-13 22:46:46,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 130 transitions, 1636 flow, removed 51 selfloop flow, removed 15 redundant places. [2021-10-13 22:46:46,216 INFO L242 Difference]: Finished difference. Result has 157 places, 116 transitions, 1128 flow [2021-10-13 22:46:46,217 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1014, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1128, PETRI_PLACES=157, PETRI_TRANSITIONS=116} [2021-10-13 22:46:46,217 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 91 predicate places. [2021-10-13 22:46:46,217 INFO L470 AbstractCegarLoop]: Abstraction has has 157 places, 116 transitions, 1128 flow [2021-10-13 22:46:46,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 54.18181818181818) internal successors, (596), 11 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:46,217 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:46,218 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:46:46,242 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 22:46:46,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-13 22:46:46,436 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:46,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:46,436 INFO L82 PathProgramCache]: Analyzing trace with hash -418554274, now seen corresponding path program 5 times [2021-10-13 22:46:46,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:46,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125222759] [2021-10-13 22:46:46,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:46,436 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:46,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:46,543 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 22:46:46,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:46,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125222759] [2021-10-13 22:46:46,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125222759] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:46,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869836882] [2021-10-13 22:46:46,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:46:46,544 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:46,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:46,545 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 22:46:46,546 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 22:46:46,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 22:46:46,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:46,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 22:46:46,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:46,933 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 22:46:46,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869836882] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:46,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:46,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-10-13 22:46:46,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490458952] [2021-10-13 22:46:46,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 22:46:46,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:46,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 22:46:46,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-13 22:46:46,935 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:46:46,936 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 116 transitions, 1128 flow. Second operand has 11 states, 11 states have (on average 54.18181818181818) internal successors, (596), 11 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:46,936 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:46,936 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:46:46,936 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:47,122 INFO L129 PetriNetUnfolder]: 66/401 cut-off events. [2021-10-13 22:46:47,122 INFO L130 PetriNetUnfolder]: For 7101/7209 co-relation queries the response was YES. [2021-10-13 22:46:47,125 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1740 conditions, 401 events. 66/401 cut-off events. For 7101/7209 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2054 event pairs, 0 based on Foata normal form. 40/400 useless extension candidates. Maximal degree in co-relation 1660. Up to 76 conditions per place. [2021-10-13 22:46:47,128 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 50 selfloop transitions, 30 changer transitions 8/132 dead transitions. [2021-10-13 22:46:47,128 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 132 transitions, 1838 flow [2021-10-13 22:46:47,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 22:46:47,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-13 22:46:47,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 948 transitions. [2021-10-13 22:46:47,129 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8449197860962567 [2021-10-13 22:46:47,129 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 948 transitions. [2021-10-13 22:46:47,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 948 transitions. [2021-10-13 22:46:47,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:47,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 948 transitions. [2021-10-13 22:46:47,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 55.76470588235294) internal successors, (948), 17 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:47,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 66.0) internal successors, (1188), 18 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:47,163 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 66.0) internal successors, (1188), 18 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:47,164 INFO L186 Difference]: Start difference. First operand has 157 places, 116 transitions, 1128 flow. Second operand 17 states and 948 transitions. [2021-10-13 22:46:47,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 132 transitions, 1838 flow [2021-10-13 22:46:47,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 132 transitions, 1630 flow, removed 91 selfloop flow, removed 10 redundant places. [2021-10-13 22:46:47,181 INFO L242 Difference]: Finished difference. Result has 165 places, 118 transitions, 1171 flow [2021-10-13 22:46:47,182 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1028, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1171, PETRI_PLACES=165, PETRI_TRANSITIONS=118} [2021-10-13 22:46:47,182 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 99 predicate places. [2021-10-13 22:46:47,182 INFO L470 AbstractCegarLoop]: Abstraction has has 165 places, 118 transitions, 1171 flow [2021-10-13 22:46:47,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 54.18181818181818) internal successors, (596), 11 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:47,182 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:47,183 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:46:47,212 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 22:46:47,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-13 22:46:47,392 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:47,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:47,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1346218356, now seen corresponding path program 6 times [2021-10-13 22:46:47,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:47,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922453829] [2021-10-13 22:46:47,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:47,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:47,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:47,485 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 22:46:47,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:47,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922453829] [2021-10-13 22:46:47,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922453829] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:47,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061863723] [2021-10-13 22:46:47,485 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:46:47,486 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:47,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:47,487 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 22:46:47,513 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 22:46:47,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 22:46:47,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:47,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 22:46:47,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:47,924 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 22:46:47,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061863723] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:47,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:47,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-10-13 22:46:47,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004504312] [2021-10-13 22:46:47,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 22:46:47,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:47,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 22:46:47,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-13 22:46:47,926 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:46:47,927 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 118 transitions, 1171 flow. Second operand has 12 states, 12 states have (on average 54.25) internal successors, (651), 12 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:47,927 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:47,927 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:46:47,927 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:48,194 INFO L129 PetriNetUnfolder]: 75/467 cut-off events. [2021-10-13 22:46:48,195 INFO L130 PetriNetUnfolder]: For 7173/7275 co-relation queries the response was YES. [2021-10-13 22:46:48,198 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1945 conditions, 467 events. 75/467 cut-off events. For 7173/7275 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2589 event pairs, 0 based on Foata normal form. 43/462 useless extension candidates. Maximal degree in co-relation 1863. Up to 92 conditions per place. [2021-10-13 22:46:48,201 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 41 selfloop transitions, 50 changer transitions 8/143 dead transitions. [2021-10-13 22:46:48,201 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 143 transitions, 2017 flow [2021-10-13 22:46:48,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-13 22:46:48,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-13 22:46:48,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1057 transitions. [2021-10-13 22:46:48,203 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8429027113237639 [2021-10-13 22:46:48,203 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1057 transitions. [2021-10-13 22:46:48,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1057 transitions. [2021-10-13 22:46:48,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:48,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1057 transitions. [2021-10-13 22:46:48,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 55.63157894736842) internal successors, (1057), 19 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:48,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 66.0) internal successors, (1320), 20 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:48,208 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 66.0) internal successors, (1320), 20 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:48,209 INFO L186 Difference]: Start difference. First operand has 165 places, 118 transitions, 1171 flow. Second operand 19 states and 1057 transitions. [2021-10-13 22:46:48,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 143 transitions, 2017 flow [2021-10-13 22:46:48,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 143 transitions, 1838 flow, removed 64 selfloop flow, removed 14 redundant places. [2021-10-13 22:46:48,230 INFO L242 Difference]: Finished difference. Result has 173 places, 128 transitions, 1408 flow [2021-10-13 22:46:48,230 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1064, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1408, PETRI_PLACES=173, PETRI_TRANSITIONS=128} [2021-10-13 22:46:48,230 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 107 predicate places. [2021-10-13 22:46:48,231 INFO L470 AbstractCegarLoop]: Abstraction has has 173 places, 128 transitions, 1408 flow [2021-10-13 22:46:48,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.25) internal successors, (651), 12 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:48,231 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:48,231 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:46:48,257 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 22:46:48,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-13 22:46:48,451 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:48,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:48,452 INFO L82 PathProgramCache]: Analyzing trace with hash -547396332, now seen corresponding path program 7 times [2021-10-13 22:46:48,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:48,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973981369] [2021-10-13 22:46:48,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:48,452 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:48,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:48,561 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 22:46:48,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:48,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973981369] [2021-10-13 22:46:48,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973981369] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:48,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459758816] [2021-10-13 22:46:48,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:46:48,562 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:48,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:48,563 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 22:46:48,596 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 22:46:48,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:48,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 22:46:48,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:49,013 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:46:49,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459758816] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:49,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:49,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-10-13 22:46:49,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735783909] [2021-10-13 22:46:49,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 22:46:49,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:49,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 22:46:49,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-13 22:46:49,015 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:46:49,015 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 128 transitions, 1408 flow. Second operand has 11 states, 11 states have (on average 54.18181818181818) internal successors, (596), 11 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:49,015 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:49,015 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:46:49,015 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:49,293 INFO L129 PetriNetUnfolder]: 90/549 cut-off events. [2021-10-13 22:46:49,293 INFO L130 PetriNetUnfolder]: For 9720/9839 co-relation queries the response was YES. [2021-10-13 22:46:49,297 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2456 conditions, 549 events. 90/549 cut-off events. For 9720/9839 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3181 event pairs, 0 based on Foata normal form. 49/541 useless extension candidates. Maximal degree in co-relation 2369. Up to 112 conditions per place. [2021-10-13 22:46:49,301 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 42 selfloop transitions, 60 changer transitions 8/154 dead transitions. [2021-10-13 22:46:49,301 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 154 transitions, 2380 flow [2021-10-13 22:46:49,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 22:46:49,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-13 22:46:49,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1117 transitions. [2021-10-13 22:46:49,303 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8462121212121212 [2021-10-13 22:46:49,303 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1117 transitions. [2021-10-13 22:46:49,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1117 transitions. [2021-10-13 22:46:49,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:49,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1117 transitions. [2021-10-13 22:46:49,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 55.85) internal successors, (1117), 20 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:49,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 66.0) internal successors, (1386), 21 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:49,307 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 66.0) internal successors, (1386), 21 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:49,307 INFO L186 Difference]: Start difference. First operand has 173 places, 128 transitions, 1408 flow. Second operand 20 states and 1117 transitions. [2021-10-13 22:46:49,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 154 transitions, 2380 flow [2021-10-13 22:46:49,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 154 transitions, 2188 flow, removed 77 selfloop flow, removed 12 redundant places. [2021-10-13 22:46:49,334 INFO L242 Difference]: Finished difference. Result has 184 places, 134 transitions, 1648 flow [2021-10-13 22:46:49,334 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1290, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1648, PETRI_PLACES=184, PETRI_TRANSITIONS=134} [2021-10-13 22:46:49,334 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 118 predicate places. [2021-10-13 22:46:49,335 INFO L470 AbstractCegarLoop]: Abstraction has has 184 places, 134 transitions, 1648 flow [2021-10-13 22:46:49,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 54.18181818181818) internal successors, (596), 11 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:49,335 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:49,335 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:46:49,360 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 22:46:49,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-13 22:46:49,550 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:49,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:49,550 INFO L82 PathProgramCache]: Analyzing trace with hash -322960592, now seen corresponding path program 8 times [2021-10-13 22:46:49,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:49,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772095045] [2021-10-13 22:46:49,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:49,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:49,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:49,630 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 22:46:49,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:49,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772095045] [2021-10-13 22:46:49,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772095045] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:49,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887797042] [2021-10-13 22:46:49,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:46:49,630 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:49,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:49,632 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 22:46:49,633 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 22:46:49,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:46:49,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:49,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 22:46:49,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:50,024 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 22:46:50,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887797042] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:50,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:50,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-10-13 22:46:50,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219010369] [2021-10-13 22:46:50,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 22:46:50,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:50,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 22:46:50,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-13 22:46:50,027 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:46:50,028 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 134 transitions, 1648 flow. Second operand has 12 states, 12 states have (on average 54.166666666666664) internal successors, (650), 12 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:50,028 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:50,028 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:46:50,028 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:50,384 INFO L129 PetriNetUnfolder]: 96/581 cut-off events. [2021-10-13 22:46:50,385 INFO L130 PetriNetUnfolder]: For 13424/13582 co-relation queries the response was YES. [2021-10-13 22:46:50,389 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2839 conditions, 581 events. 96/581 cut-off events. For 13424/13582 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3499 event pairs, 0 based on Foata normal form. 53/575 useless extension candidates. Maximal degree in co-relation 2747. Up to 120 conditions per place. [2021-10-13 22:46:50,393 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 41 selfloop transitions, 70 changer transitions 17/172 dead transitions. [2021-10-13 22:46:50,393 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 172 transitions, 3125 flow [2021-10-13 22:46:50,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 22:46:50,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-13 22:46:50,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1338 transitions. [2021-10-13 22:46:50,396 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8446969696969697 [2021-10-13 22:46:50,396 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1338 transitions. [2021-10-13 22:46:50,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1338 transitions. [2021-10-13 22:46:50,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:50,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1338 transitions. [2021-10-13 22:46:50,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 55.75) internal successors, (1338), 24 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:50,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:50,401 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:50,402 INFO L186 Difference]: Start difference. First operand has 184 places, 134 transitions, 1648 flow. Second operand 24 states and 1338 transitions. [2021-10-13 22:46:50,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 172 transitions, 3125 flow [2021-10-13 22:46:50,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 172 transitions, 2783 flow, removed 132 selfloop flow, removed 15 redundant places. [2021-10-13 22:46:50,436 INFO L242 Difference]: Finished difference. Result has 199 places, 148 transitions, 2039 flow [2021-10-13 22:46:50,437 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1454, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2039, PETRI_PLACES=199, PETRI_TRANSITIONS=148} [2021-10-13 22:46:50,437 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 133 predicate places. [2021-10-13 22:46:50,437 INFO L470 AbstractCegarLoop]: Abstraction has has 199 places, 148 transitions, 2039 flow [2021-10-13 22:46:50,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.166666666666664) internal successors, (650), 12 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:50,438 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:50,438 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:46:50,460 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 22:46:50,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-13 22:46:50,661 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:50,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:50,661 INFO L82 PathProgramCache]: Analyzing trace with hash -607878952, now seen corresponding path program 9 times [2021-10-13 22:46:50,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:50,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894813308] [2021-10-13 22:46:50,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:50,662 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:50,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:50,790 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 22:46:50,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:50,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894813308] [2021-10-13 22:46:50,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894813308] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:50,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256895756] [2021-10-13 22:46:50,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:46:50,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:50,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:50,792 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 22:46:50,793 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 22:46:51,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 22:46:51,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:51,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 22:46:51,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:51,291 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 22:46:51,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256895756] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:51,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:51,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-10-13 22:46:51,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870788699] [2021-10-13 22:46:51,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 22:46:51,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:51,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 22:46:51,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-10-13 22:46:51,294 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:46:51,295 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 148 transitions, 2039 flow. Second operand has 11 states, 11 states have (on average 54.09090909090909) internal successors, (595), 11 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:51,295 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:51,295 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:46:51,295 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:51,488 INFO L129 PetriNetUnfolder]: 92/575 cut-off events. [2021-10-13 22:46:51,488 INFO L130 PetriNetUnfolder]: For 13923/14066 co-relation queries the response was YES. [2021-10-13 22:46:51,493 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2791 conditions, 575 events. 92/575 cut-off events. For 13923/14066 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3459 event pairs, 0 based on Foata normal form. 34/550 useless extension candidates. Maximal degree in co-relation 2692. Up to 112 conditions per place. [2021-10-13 22:46:51,498 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 87 selfloop transitions, 32 changer transitions 8/171 dead transitions. [2021-10-13 22:46:51,498 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 171 transitions, 3076 flow [2021-10-13 22:46:51,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 22:46:51,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-13 22:46:51,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 836 transitions. [2021-10-13 22:46:51,500 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8444444444444444 [2021-10-13 22:46:51,500 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 836 transitions. [2021-10-13 22:46:51,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 836 transitions. [2021-10-13 22:46:51,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:51,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 836 transitions. [2021-10-13 22:46:51,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 55.733333333333334) internal successors, (836), 15 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:51,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 66.0) internal successors, (1056), 16 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:51,504 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 66.0) internal successors, (1056), 16 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:51,504 INFO L186 Difference]: Start difference. First operand has 199 places, 148 transitions, 2039 flow. Second operand 15 states and 836 transitions. [2021-10-13 22:46:51,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 171 transitions, 3076 flow [2021-10-13 22:46:51,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 171 transitions, 2570 flow, removed 210 selfloop flow, removed 19 redundant places. [2021-10-13 22:46:51,546 INFO L242 Difference]: Finished difference. Result has 194 places, 150 transitions, 1791 flow [2021-10-13 22:46:51,546 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1629, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1791, PETRI_PLACES=194, PETRI_TRANSITIONS=150} [2021-10-13 22:46:51,546 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 128 predicate places. [2021-10-13 22:46:51,546 INFO L470 AbstractCegarLoop]: Abstraction has has 194 places, 150 transitions, 1791 flow [2021-10-13 22:46:51,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 54.09090909090909) internal successors, (595), 11 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:51,547 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:51,547 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:46:51,575 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 22:46:51,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:51,763 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:51,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:51,764 INFO L82 PathProgramCache]: Analyzing trace with hash -516206398, now seen corresponding path program 10 times [2021-10-13 22:46:51,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:51,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969563881] [2021-10-13 22:46:51,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:51,764 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:51,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:51,862 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 22:46:51,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:51,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969563881] [2021-10-13 22:46:51,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969563881] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:51,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584643564] [2021-10-13 22:46:51,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:46:51,862 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:51,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:51,863 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 22:46:51,894 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 22:46:52,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:46:52,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:52,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 22:46:52,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:52,467 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 22:46:52,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584643564] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:52,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:52,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-10-13 22:46:52,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442972012] [2021-10-13 22:46:52,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 22:46:52,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:52,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 22:46:52,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-13 22:46:52,469 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:46:52,470 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 150 transitions, 1791 flow. Second operand has 11 states, 11 states have (on average 54.09090909090909) internal successors, (595), 11 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:52,470 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:52,470 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:46:52,470 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:52,736 INFO L129 PetriNetUnfolder]: 94/600 cut-off events. [2021-10-13 22:46:52,736 INFO L130 PetriNetUnfolder]: For 12748/12860 co-relation queries the response was YES. [2021-10-13 22:46:52,740 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2691 conditions, 600 events. 94/600 cut-off events. For 12748/12860 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3639 event pairs, 0 based on Foata normal form. 44/583 useless extension candidates. Maximal degree in co-relation 2593. Up to 97 conditions per place. [2021-10-13 22:46:52,745 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 63 selfloop transitions, 61 changer transitions 8/176 dead transitions. [2021-10-13 22:46:52,745 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 176 transitions, 2895 flow [2021-10-13 22:46:52,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 22:46:52,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-10-13 22:46:52,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1001 transitions. [2021-10-13 22:46:52,747 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8425925925925926 [2021-10-13 22:46:52,748 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1001 transitions. [2021-10-13 22:46:52,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1001 transitions. [2021-10-13 22:46:52,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:52,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1001 transitions. [2021-10-13 22:46:52,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 55.611111111111114) internal successors, (1001), 18 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:52,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 66.0) internal successors, (1254), 19 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:52,758 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 66.0) internal successors, (1254), 19 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:52,758 INFO L186 Difference]: Start difference. First operand has 194 places, 150 transitions, 1791 flow. Second operand 18 states and 1001 transitions. [2021-10-13 22:46:52,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 176 transitions, 2895 flow [2021-10-13 22:46:52,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 176 transitions, 2703 flow, removed 68 selfloop flow, removed 12 redundant places. [2021-10-13 22:46:52,793 INFO L242 Difference]: Finished difference. Result has 201 places, 152 transitions, 1904 flow [2021-10-13 22:46:52,793 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1673, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1904, PETRI_PLACES=201, PETRI_TRANSITIONS=152} [2021-10-13 22:46:52,793 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 135 predicate places. [2021-10-13 22:46:52,793 INFO L470 AbstractCegarLoop]: Abstraction has has 201 places, 152 transitions, 1904 flow [2021-10-13 22:46:52,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 54.09090909090909) internal successors, (595), 11 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:52,794 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:52,794 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:46:52,817 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 22:46:53,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:53,009 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:53,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:53,009 INFO L82 PathProgramCache]: Analyzing trace with hash -658970206, now seen corresponding path program 11 times [2021-10-13 22:46:53,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:53,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257079486] [2021-10-13 22:46:53,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:53,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:53,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:53,095 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 22:46:53,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:53,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257079486] [2021-10-13 22:46:53,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257079486] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:53,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648537074] [2021-10-13 22:46:53,095 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:46:53,096 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:53,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:53,097 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 22:46:53,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-13 22:46:53,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 22:46:53,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:53,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 22:46:53,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:53,671 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 22:46:53,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648537074] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:53,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:53,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-10-13 22:46:53,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362892669] [2021-10-13 22:46:53,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 22:46:53,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:53,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 22:46:53,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-10-13 22:46:53,673 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:46:53,674 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 152 transitions, 1904 flow. Second operand has 11 states, 11 states have (on average 54.09090909090909) internal successors, (595), 11 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:53,674 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:53,674 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:46:53,674 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:53,940 INFO L129 PetriNetUnfolder]: 109/675 cut-off events. [2021-10-13 22:46:53,941 INFO L130 PetriNetUnfolder]: For 15990/16111 co-relation queries the response was YES. [2021-10-13 22:46:53,946 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3238 conditions, 675 events. 109/675 cut-off events. For 15990/16111 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 4152 event pairs, 0 based on Foata normal form. 53/661 useless extension candidates. Maximal degree in co-relation 3138. Up to 117 conditions per place. [2021-10-13 22:46:53,950 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 50 selfloop transitions, 85 changer transitions 8/187 dead transitions. [2021-10-13 22:46:53,950 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 187 transitions, 3334 flow [2021-10-13 22:46:53,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 22:46:53,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-13 22:46:53,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1117 transitions. [2021-10-13 22:46:53,952 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8462121212121212 [2021-10-13 22:46:53,952 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1117 transitions. [2021-10-13 22:46:53,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1117 transitions. [2021-10-13 22:46:53,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:53,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1117 transitions. [2021-10-13 22:46:53,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 55.85) internal successors, (1117), 20 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:53,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 66.0) internal successors, (1386), 21 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:53,956 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 66.0) internal successors, (1386), 21 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:53,957 INFO L186 Difference]: Start difference. First operand has 201 places, 152 transitions, 1904 flow. Second operand 20 states and 1117 transitions. [2021-10-13 22:46:53,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 187 transitions, 3334 flow [2021-10-13 22:46:53,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 187 transitions, 3021 flow, removed 104 selfloop flow, removed 15 redundant places. [2021-10-13 22:46:53,994 INFO L242 Difference]: Finished difference. Result has 209 places, 158 transitions, 2180 flow [2021-10-13 22:46:53,994 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1733, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2180, PETRI_PLACES=209, PETRI_TRANSITIONS=158} [2021-10-13 22:46:53,994 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 143 predicate places. [2021-10-13 22:46:53,994 INFO L470 AbstractCegarLoop]: Abstraction has has 209 places, 158 transitions, 2180 flow [2021-10-13 22:46:53,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 54.09090909090909) internal successors, (595), 11 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:53,994 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:53,995 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:46:54,020 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 22:46:54,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:54,207 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:54,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:54,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1038999808, now seen corresponding path program 12 times [2021-10-13 22:46:54,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:54,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382534591] [2021-10-13 22:46:54,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:54,208 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:54,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:54,294 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 22:46:54,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:54,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382534591] [2021-10-13 22:46:54,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382534591] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:54,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158987976] [2021-10-13 22:46:54,295 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:46:54,295 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:54,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:54,296 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 22:46:54,297 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 22:46:54,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 22:46:54,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:54,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:46:54,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:54,920 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 22:46:54,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158987976] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:54,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:54,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-10-13 22:46:54,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846781221] [2021-10-13 22:46:54,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 22:46:54,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:54,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 22:46:54,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-13 22:46:54,922 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:46:54,922 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 158 transitions, 2180 flow. Second operand has 12 states, 12 states have (on average 54.166666666666664) internal successors, (650), 12 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:54,922 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:54,922 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:46:54,922 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:55,245 INFO L129 PetriNetUnfolder]: 104/660 cut-off events. [2021-10-13 22:46:55,245 INFO L130 PetriNetUnfolder]: For 16825/16972 co-relation queries the response was YES. [2021-10-13 22:46:55,251 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3214 conditions, 660 events. 104/660 cut-off events. For 16825/16972 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 4080 event pairs, 0 based on Foata normal form. 59/653 useless extension candidates. Maximal degree in co-relation 3110. Up to 113 conditions per place. [2021-10-13 22:46:55,256 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 44 selfloop transitions, 91 changer transitions 11/190 dead transitions. [2021-10-13 22:46:55,256 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 190 transitions, 3598 flow [2021-10-13 22:46:55,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 22:46:55,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-13 22:46:55,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1114 transitions. [2021-10-13 22:46:55,258 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.843939393939394 [2021-10-13 22:46:55,258 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1114 transitions. [2021-10-13 22:46:55,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1114 transitions. [2021-10-13 22:46:55,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:55,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1114 transitions. [2021-10-13 22:46:55,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 55.7) internal successors, (1114), 20 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:55,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 66.0) internal successors, (1386), 21 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:55,262 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 66.0) internal successors, (1386), 21 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:55,262 INFO L186 Difference]: Start difference. First operand has 209 places, 158 transitions, 2180 flow. Second operand 20 states and 1114 transitions. [2021-10-13 22:46:55,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 190 transitions, 3598 flow [2021-10-13 22:46:55,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 190 transitions, 3215 flow, removed 129 selfloop flow, removed 15 redundant places. [2021-10-13 22:46:55,307 INFO L242 Difference]: Finished difference. Result has 216 places, 161 transitions, 2259 flow [2021-10-13 22:46:55,307 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1915, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2259, PETRI_PLACES=216, PETRI_TRANSITIONS=161} [2021-10-13 22:46:55,308 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 150 predicate places. [2021-10-13 22:46:55,308 INFO L470 AbstractCegarLoop]: Abstraction has has 216 places, 161 transitions, 2259 flow [2021-10-13 22:46:55,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.166666666666664) internal successors, (650), 12 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:55,308 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:55,308 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:46:55,334 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 22:46:55,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-13 22:46:55,532 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:55,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:55,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1086566433, now seen corresponding path program 13 times [2021-10-13 22:46:55,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:55,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132874295] [2021-10-13 22:46:55,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:55,532 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:55,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:55,632 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 22:46:55,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:55,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132874295] [2021-10-13 22:46:55,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132874295] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:55,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536999952] [2021-10-13 22:46:55,633 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:46:55,633 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:55,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:55,634 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 22:46:55,634 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 22:46:55,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:55,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:46:55,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:56,249 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 22:46:56,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536999952] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:56,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:56,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-10-13 22:46:56,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775501523] [2021-10-13 22:46:56,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 22:46:56,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:56,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 22:46:56,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-10-13 22:46:56,251 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:46:56,252 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 161 transitions, 2259 flow. Second operand has 13 states, 13 states have (on average 54.15384615384615) internal successors, (704), 13 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:56,252 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:56,252 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:46:56,252 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:56,456 INFO L129 PetriNetUnfolder]: 104/667 cut-off events. [2021-10-13 22:46:56,456 INFO L130 PetriNetUnfolder]: For 16262/16389 co-relation queries the response was YES. [2021-10-13 22:46:56,461 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3213 conditions, 667 events. 104/667 cut-off events. For 16262/16389 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4154 event pairs, 0 based on Foata normal form. 35/634 useless extension candidates. Maximal degree in co-relation 3106. Up to 157 conditions per place. [2021-10-13 22:46:56,466 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 110 selfloop transitions, 17 changer transitions 8/179 dead transitions. [2021-10-13 22:46:56,466 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 179 transitions, 3223 flow [2021-10-13 22:46:56,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 22:46:56,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-13 22:46:56,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 835 transitions. [2021-10-13 22:46:56,468 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8434343434343434 [2021-10-13 22:46:56,468 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 835 transitions. [2021-10-13 22:46:56,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 835 transitions. [2021-10-13 22:46:56,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:56,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 835 transitions. [2021-10-13 22:46:56,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 55.666666666666664) internal successors, (835), 15 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:56,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 66.0) internal successors, (1056), 16 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:56,471 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 66.0) internal successors, (1056), 16 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:56,471 INFO L186 Difference]: Start difference. First operand has 216 places, 161 transitions, 2259 flow. Second operand 15 states and 835 transitions. [2021-10-13 22:46:56,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 179 transitions, 3223 flow [2021-10-13 22:46:56,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 179 transitions, 2977 flow, removed 46 selfloop flow, removed 17 redundant places. [2021-10-13 22:46:56,517 INFO L242 Difference]: Finished difference. Result has 215 places, 163 transitions, 2165 flow [2021-10-13 22:46:56,517 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2023, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2165, PETRI_PLACES=215, PETRI_TRANSITIONS=163} [2021-10-13 22:46:56,518 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 149 predicate places. [2021-10-13 22:46:56,518 INFO L470 AbstractCegarLoop]: Abstraction has has 215 places, 163 transitions, 2165 flow [2021-10-13 22:46:56,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.15384615384615) internal successors, (704), 13 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:56,518 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:56,518 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:46:56,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-10-13 22:46:56,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:56,731 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:56,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:56,732 INFO L82 PathProgramCache]: Analyzing trace with hash -876966481, now seen corresponding path program 14 times [2021-10-13 22:46:56,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:56,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860594508] [2021-10-13 22:46:56,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:56,732 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:56,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:56,838 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 22:46:56,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:56,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860594508] [2021-10-13 22:46:56,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860594508] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:56,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109869565] [2021-10-13 22:46:56,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:46:56,839 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:56,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:56,841 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 22:46:56,859 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 22:46:57,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:46:57,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:57,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:46:57,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:57,494 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 22:46:57,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109869565] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:57,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:57,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-10-13 22:46:57,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708079712] [2021-10-13 22:46:57,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 22:46:57,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:57,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 22:46:57,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-10-13 22:46:57,497 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:46:57,497 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 163 transitions, 2165 flow. Second operand has 13 states, 13 states have (on average 54.15384615384615) internal successors, (704), 13 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:57,497 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:57,497 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:46:57,497 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:57,753 INFO L129 PetriNetUnfolder]: 106/671 cut-off events. [2021-10-13 22:46:57,753 INFO L130 PetriNetUnfolder]: For 19502/19655 co-relation queries the response was YES. [2021-10-13 22:46:57,758 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3321 conditions, 671 events. 106/671 cut-off events. For 19502/19655 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 4157 event pairs, 0 based on Foata normal form. 40/641 useless extension candidates. Maximal degree in co-relation 3213. Up to 132 conditions per place. [2021-10-13 22:46:57,762 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 95 selfloop transitions, 34 changer transitions 8/181 dead transitions. [2021-10-13 22:46:57,762 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 181 transitions, 3227 flow [2021-10-13 22:46:57,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-13 22:46:57,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-13 22:46:57,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1058 transitions. [2021-10-13 22:46:57,766 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8437001594896332 [2021-10-13 22:46:57,766 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1058 transitions. [2021-10-13 22:46:57,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1058 transitions. [2021-10-13 22:46:57,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:57,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1058 transitions. [2021-10-13 22:46:57,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 55.68421052631579) internal successors, (1058), 19 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:57,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 66.0) internal successors, (1320), 20 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:57,770 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 66.0) internal successors, (1320), 20 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:57,770 INFO L186 Difference]: Start difference. First operand has 215 places, 163 transitions, 2165 flow. Second operand 19 states and 1058 transitions. [2021-10-13 22:46:57,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 181 transitions, 3227 flow [2021-10-13 22:46:57,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 181 transitions, 3037 flow, removed 80 selfloop flow, removed 12 redundant places. [2021-10-13 22:46:57,816 INFO L242 Difference]: Finished difference. Result has 223 places, 165 transitions, 2231 flow [2021-10-13 22:46:57,816 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2053, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2231, PETRI_PLACES=223, PETRI_TRANSITIONS=165} [2021-10-13 22:46:57,817 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 157 predicate places. [2021-10-13 22:46:57,817 INFO L470 AbstractCegarLoop]: Abstraction has has 223 places, 165 transitions, 2231 flow [2021-10-13 22:46:57,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.15384615384615) internal successors, (704), 13 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:57,817 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:57,817 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:46:57,834 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 22:46:58,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:58,018 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:58,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:58,018 INFO L82 PathProgramCache]: Analyzing trace with hash -627590555, now seen corresponding path program 15 times [2021-10-13 22:46:58,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:58,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348790308] [2021-10-13 22:46:58,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:58,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:58,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:58,132 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 22:46:58,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:58,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348790308] [2021-10-13 22:46:58,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348790308] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:58,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453621547] [2021-10-13 22:46:58,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:46:58,133 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:58,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:58,134 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 22:46:58,155 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 22:46:58,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-13 22:46:58,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:58,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:46:58,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:46:58,840 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 22:46:58,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453621547] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:58,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:46:58,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-10-13 22:46:58,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441004039] [2021-10-13 22:46:58,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 22:46:58,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:46:58,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 22:46:58,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-10-13 22:46:58,842 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:46:58,842 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 165 transitions, 2231 flow. Second operand has 14 states, 14 states have (on average 54.214285714285715) internal successors, (759), 14 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:58,843 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:46:58,843 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:46:58,843 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:46:59,130 INFO L129 PetriNetUnfolder]: 110/714 cut-off events. [2021-10-13 22:46:59,130 INFO L130 PetriNetUnfolder]: For 20296/20428 co-relation queries the response was YES. [2021-10-13 22:46:59,136 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3495 conditions, 714 events. 110/714 cut-off events. For 20296/20428 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4480 event pairs, 0 based on Foata normal form. 46/685 useless extension candidates. Maximal degree in co-relation 3385. Up to 121 conditions per place. [2021-10-13 22:46:59,141 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 76 selfloop transitions, 58 changer transitions 8/186 dead transitions. [2021-10-13 22:46:59,141 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 186 transitions, 3383 flow [2021-10-13 22:46:59,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-13 22:46:59,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-13 22:46:59,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1167 transitions. [2021-10-13 22:46:59,143 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.841991341991342 [2021-10-13 22:46:59,143 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1167 transitions. [2021-10-13 22:46:59,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1167 transitions. [2021-10-13 22:46:59,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:46:59,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1167 transitions. [2021-10-13 22:46:59,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 55.57142857142857) internal successors, (1167), 21 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:59,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 66.0) internal successors, (1452), 22 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:59,147 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 66.0) internal successors, (1452), 22 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:59,147 INFO L186 Difference]: Start difference. First operand has 223 places, 165 transitions, 2231 flow. Second operand 21 states and 1167 transitions. [2021-10-13 22:46:59,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 186 transitions, 3383 flow [2021-10-13 22:46:59,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 186 transitions, 3185 flow, removed 69 selfloop flow, removed 16 redundant places. [2021-10-13 22:46:59,210 INFO L242 Difference]: Finished difference. Result has 229 places, 169 transitions, 2383 flow [2021-10-13 22:46:59,210 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2101, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2383, PETRI_PLACES=229, PETRI_TRANSITIONS=169} [2021-10-13 22:46:59,210 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 163 predicate places. [2021-10-13 22:46:59,211 INFO L470 AbstractCegarLoop]: Abstraction has has 229 places, 169 transitions, 2383 flow [2021-10-13 22:46:59,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 54.214285714285715) internal successors, (759), 14 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:46:59,211 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:46:59,211 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:46:59,235 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 22:46:59,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:59,436 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:46:59,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:46:59,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1542467523, now seen corresponding path program 16 times [2021-10-13 22:46:59,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:46:59,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960576382] [2021-10-13 22:46:59,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:46:59,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:46:59,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:46:59,545 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 22:46:59,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:46:59,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960576382] [2021-10-13 22:46:59,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960576382] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:46:59,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893525731] [2021-10-13 22:46:59,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:46:59,546 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:46:59,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:46:59,547 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 22:46:59,549 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 22:46:59,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:46:59,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:46:59,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:46:59,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:00,195 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 22:47:00,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893525731] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:00,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:00,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-10-13 22:47:00,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553188516] [2021-10-13 22:47:00,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 22:47:00,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:00,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 22:47:00,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-10-13 22:47:00,197 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:47:00,198 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 169 transitions, 2383 flow. Second operand has 13 states, 13 states have (on average 54.15384615384615) internal successors, (704), 13 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:00,198 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:00,198 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:47:00,198 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:00,469 INFO L129 PetriNetUnfolder]: 112/725 cut-off events. [2021-10-13 22:47:00,469 INFO L130 PetriNetUnfolder]: For 21016/21164 co-relation queries the response was YES. [2021-10-13 22:47:00,473 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3609 conditions, 725 events. 112/725 cut-off events. For 21016/21164 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4603 event pairs, 0 based on Foata normal form. 52/701 useless extension candidates. Maximal degree in co-relation 3496. Up to 125 conditions per place. [2021-10-13 22:47:00,477 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 63 selfloop transitions, 72 changer transitions 8/187 dead transitions. [2021-10-13 22:47:00,477 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 187 transitions, 3485 flow [2021-10-13 22:47:00,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 22:47:00,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-13 22:47:00,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1223 transitions. [2021-10-13 22:47:00,479 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8422865013774105 [2021-10-13 22:47:00,479 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1223 transitions. [2021-10-13 22:47:00,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1223 transitions. [2021-10-13 22:47:00,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:00,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1223 transitions. [2021-10-13 22:47:00,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 55.59090909090909) internal successors, (1223), 22 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:00,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 66.0) internal successors, (1518), 23 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:00,483 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 66.0) internal successors, (1518), 23 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:00,483 INFO L186 Difference]: Start difference. First operand has 229 places, 169 transitions, 2383 flow. Second operand 22 states and 1223 transitions. [2021-10-13 22:47:00,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 187 transitions, 3485 flow [2021-10-13 22:47:00,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 187 transitions, 3259 flow, removed 69 selfloop flow, removed 17 redundant places. [2021-10-13 22:47:00,541 INFO L242 Difference]: Finished difference. Result has 235 places, 171 transitions, 2495 flow [2021-10-13 22:47:00,541 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2225, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2495, PETRI_PLACES=235, PETRI_TRANSITIONS=171} [2021-10-13 22:47:00,541 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 169 predicate places. [2021-10-13 22:47:00,541 INFO L470 AbstractCegarLoop]: Abstraction has has 235 places, 171 transitions, 2495 flow [2021-10-13 22:47:00,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.15384615384615) internal successors, (704), 13 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:00,542 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:00,542 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:47:00,558 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 22:47:00,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-13 22:47:00,742 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:00,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:00,743 INFO L82 PathProgramCache]: Analyzing trace with hash -698252939, now seen corresponding path program 17 times [2021-10-13 22:47:00,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:00,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124230389] [2021-10-13 22:47:00,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:00,743 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:00,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:00,823 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 22:47:00,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:00,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124230389] [2021-10-13 22:47:00,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124230389] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:00,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501455388] [2021-10-13 22:47:00,824 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:47:00,824 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:00,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:00,825 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 22:47:00,853 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 22:47:01,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-13 22:47:01,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:01,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 22:47:01,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:01,435 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 22:47:01,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501455388] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:01,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:01,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-10-13 22:47:01,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703884437] [2021-10-13 22:47:01,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 22:47:01,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:01,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 22:47:01,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-10-13 22:47:01,437 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:47:01,438 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 171 transitions, 2495 flow. Second operand has 13 states, 13 states have (on average 54.15384615384615) internal successors, (704), 13 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:01,438 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:01,438 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:47:01,438 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:01,795 INFO L129 PetriNetUnfolder]: 130/819 cut-off events. [2021-10-13 22:47:01,795 INFO L130 PetriNetUnfolder]: For 25638/25812 co-relation queries the response was YES. [2021-10-13 22:47:01,801 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4310 conditions, 819 events. 130/819 cut-off events. For 25638/25812 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 5322 event pairs, 0 based on Foata normal form. 60/794 useless extension candidates. Maximal degree in co-relation 4195. Up to 149 conditions per place. [2021-10-13 22:47:01,806 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 52 selfloop transitions, 98 changer transitions 8/202 dead transitions. [2021-10-13 22:47:01,807 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 202 transitions, 4029 flow [2021-10-13 22:47:01,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 22:47:01,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-13 22:47:01,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1339 transitions. [2021-10-13 22:47:01,809 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8453282828282829 [2021-10-13 22:47:01,809 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1339 transitions. [2021-10-13 22:47:01,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1339 transitions. [2021-10-13 22:47:01,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:01,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1339 transitions. [2021-10-13 22:47:01,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 55.791666666666664) internal successors, (1339), 24 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:01,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:01,812 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:01,813 INFO L186 Difference]: Start difference. First operand has 235 places, 171 transitions, 2495 flow. Second operand 24 states and 1339 transitions. [2021-10-13 22:47:01,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 202 transitions, 4029 flow [2021-10-13 22:47:01,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 202 transitions, 3729 flow, removed 90 selfloop flow, removed 19 redundant places. [2021-10-13 22:47:01,866 INFO L242 Difference]: Finished difference. Result has 245 places, 180 transitions, 2919 flow [2021-10-13 22:47:01,866 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2305, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2919, PETRI_PLACES=245, PETRI_TRANSITIONS=180} [2021-10-13 22:47:01,866 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 179 predicate places. [2021-10-13 22:47:01,866 INFO L470 AbstractCegarLoop]: Abstraction has has 245 places, 180 transitions, 2919 flow [2021-10-13 22:47:01,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.15384615384615) internal successors, (704), 13 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:01,867 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:01,867 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:47:01,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-10-13 22:47:02,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-13 22:47:02,070 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:02,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:02,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1785667259, now seen corresponding path program 18 times [2021-10-13 22:47:02,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:02,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465310896] [2021-10-13 22:47:02,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:02,071 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:02,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:02,164 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 22:47:02,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:02,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465310896] [2021-10-13 22:47:02,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465310896] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:02,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094493212] [2021-10-13 22:47:02,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:47:02,165 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:02,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:02,166 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 22:47:02,167 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 22:47:02,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-13 22:47:02,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:02,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:47:02,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:02,802 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 22:47:02,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094493212] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:02,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:02,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-10-13 22:47:02,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817155762] [2021-10-13 22:47:02,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 22:47:02,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:02,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 22:47:02,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-10-13 22:47:02,804 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:47:02,805 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 180 transitions, 2919 flow. Second operand has 14 states, 14 states have (on average 54.142857142857146) internal successors, (758), 14 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:02,805 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:02,805 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:47:02,805 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:03,259 INFO L129 PetriNetUnfolder]: 136/858 cut-off events. [2021-10-13 22:47:03,259 INFO L130 PetriNetUnfolder]: For 31252/31455 co-relation queries the response was YES. [2021-10-13 22:47:03,265 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4810 conditions, 858 events. 136/858 cut-off events. For 31252/31455 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 5691 event pairs, 0 based on Foata normal form. 66/836 useless extension candidates. Maximal degree in co-relation 4689. Up to 161 conditions per place. [2021-10-13 22:47:03,270 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 51 selfloop transitions, 108 changer transitions 17/220 dead transitions. [2021-10-13 22:47:03,270 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 220 transitions, 5020 flow [2021-10-13 22:47:03,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 22:47:03,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-13 22:47:03,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1560 transitions. [2021-10-13 22:47:03,272 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8441558441558441 [2021-10-13 22:47:03,272 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1560 transitions. [2021-10-13 22:47:03,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1560 transitions. [2021-10-13 22:47:03,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:03,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1560 transitions. [2021-10-13 22:47:03,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 55.714285714285715) internal successors, (1560), 28 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:03,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 66.0) internal successors, (1914), 29 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:03,277 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 66.0) internal successors, (1914), 29 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:03,277 INFO L186 Difference]: Start difference. First operand has 245 places, 180 transitions, 2919 flow. Second operand 28 states and 1560 transitions. [2021-10-13 22:47:03,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 220 transitions, 5020 flow [2021-10-13 22:47:03,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 220 transitions, 4566 flow, removed 160 selfloop flow, removed 21 redundant places. [2021-10-13 22:47:03,341 INFO L242 Difference]: Finished difference. Result has 258 places, 194 transitions, 3407 flow [2021-10-13 22:47:03,341 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2615, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3407, PETRI_PLACES=258, PETRI_TRANSITIONS=194} [2021-10-13 22:47:03,341 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 192 predicate places. [2021-10-13 22:47:03,341 INFO L470 AbstractCegarLoop]: Abstraction has has 258 places, 194 transitions, 3407 flow [2021-10-13 22:47:03,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 54.142857142857146) internal successors, (758), 14 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:03,341 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:03,342 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:47:03,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-13 22:47:03,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-13 22:47:03,555 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:03,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:03,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1731406441, now seen corresponding path program 19 times [2021-10-13 22:47:03,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:03,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977257719] [2021-10-13 22:47:03,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:03,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:03,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:03,672 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:03,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:03,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977257719] [2021-10-13 22:47:03,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977257719] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:03,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590046129] [2021-10-13 22:47:03,673 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:47:03,673 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:03,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:03,674 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 22:47:03,674 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 22:47:04,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:04,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:47:04,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:04,455 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:04,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590046129] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:04,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:04,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-10-13 22:47:04,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107131492] [2021-10-13 22:47:04,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 22:47:04,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:04,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 22:47:04,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-10-13 22:47:04,458 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:47:04,459 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 194 transitions, 3407 flow. Second operand has 14 states, 14 states have (on average 54.142857142857146) internal successors, (758), 14 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:04,459 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:04,459 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:47:04,459 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:04,734 INFO L129 PetriNetUnfolder]: 132/845 cut-off events. [2021-10-13 22:47:04,734 INFO L130 PetriNetUnfolder]: For 33579/33793 co-relation queries the response was YES. [2021-10-13 22:47:04,741 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4771 conditions, 845 events. 132/845 cut-off events. For 33579/33793 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 5581 event pairs, 0 based on Foata normal form. 34/790 useless extension candidates. Maximal degree in co-relation 4646. Up to 172 conditions per place. [2021-10-13 22:47:04,746 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 130 selfloop transitions, 38 changer transitions 8/220 dead transitions. [2021-10-13 22:47:04,746 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 220 transitions, 4846 flow [2021-10-13 22:47:04,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 22:47:04,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-13 22:47:04,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 946 transitions. [2021-10-13 22:47:04,747 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8431372549019608 [2021-10-13 22:47:04,747 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 946 transitions. [2021-10-13 22:47:04,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 946 transitions. [2021-10-13 22:47:04,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:04,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 946 transitions. [2021-10-13 22:47:04,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 55.64705882352941) internal successors, (946), 17 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:04,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 66.0) internal successors, (1188), 18 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:04,750 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 66.0) internal successors, (1188), 18 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:04,751 INFO L186 Difference]: Start difference. First operand has 258 places, 194 transitions, 3407 flow. Second operand 17 states and 946 transitions. [2021-10-13 22:47:04,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 220 transitions, 4846 flow [2021-10-13 22:47:04,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 220 transitions, 4144 flow, removed 277 selfloop flow, removed 22 redundant places. [2021-10-13 22:47:04,838 INFO L242 Difference]: Finished difference. Result has 252 places, 196 transitions, 2975 flow [2021-10-13 22:47:04,839 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2773, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2975, PETRI_PLACES=252, PETRI_TRANSITIONS=196} [2021-10-13 22:47:04,839 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 186 predicate places. [2021-10-13 22:47:04,839 INFO L470 AbstractCegarLoop]: Abstraction has has 252 places, 196 transitions, 2975 flow [2021-10-13 22:47:04,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 54.142857142857146) internal successors, (758), 14 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:04,839 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:04,840 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:47:04,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-10-13 22:47:05,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:05,062 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:05,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:05,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1463092109, now seen corresponding path program 20 times [2021-10-13 22:47:05,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:05,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693944532] [2021-10-13 22:47:05,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:05,063 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:05,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:05,167 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:05,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:05,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693944532] [2021-10-13 22:47:05,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693944532] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:05,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82172081] [2021-10-13 22:47:05,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:47:05,168 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:05,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:05,171 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 22:47:05,176 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 22:47:05,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:47:05,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:05,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:47:05,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:05,872 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:05,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82172081] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:05,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:05,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-10-13 22:47:05,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395935176] [2021-10-13 22:47:05,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 22:47:05,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:05,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 22:47:05,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-10-13 22:47:05,874 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:47:05,874 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 196 transitions, 2975 flow. Second operand has 14 states, 14 states have (on average 54.142857142857146) internal successors, (758), 14 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:05,874 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:05,874 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:47:05,875 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:06,240 INFO L129 PetriNetUnfolder]: 134/863 cut-off events. [2021-10-13 22:47:06,240 INFO L130 PetriNetUnfolder]: For 32615/32781 co-relation queries the response was YES. [2021-10-13 22:47:06,279 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4559 conditions, 863 events. 134/863 cut-off events. For 32615/32781 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 5716 event pairs, 0 based on Foata normal form. 60/834 useless extension candidates. Maximal degree in co-relation 4434. Up to 131 conditions per place. [2021-10-13 22:47:06,285 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 72 selfloop transitions, 104 changer transitions 8/228 dead transitions. [2021-10-13 22:47:06,285 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 228 transitions, 4614 flow [2021-10-13 22:47:06,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 22:47:06,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-13 22:47:06,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1223 transitions. [2021-10-13 22:47:06,292 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8422865013774105 [2021-10-13 22:47:06,292 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1223 transitions. [2021-10-13 22:47:06,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1223 transitions. [2021-10-13 22:47:06,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:06,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1223 transitions. [2021-10-13 22:47:06,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 55.59090909090909) internal successors, (1223), 22 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:06,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 66.0) internal successors, (1518), 23 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:06,295 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 66.0) internal successors, (1518), 23 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:06,295 INFO L186 Difference]: Start difference. First operand has 252 places, 196 transitions, 2975 flow. Second operand 22 states and 1223 transitions. [2021-10-13 22:47:06,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 228 transitions, 4614 flow [2021-10-13 22:47:06,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 228 transitions, 4370 flow, removed 88 selfloop flow, removed 14 redundant places. [2021-10-13 22:47:06,382 INFO L242 Difference]: Finished difference. Result has 261 places, 198 transitions, 3174 flow [2021-10-13 22:47:06,382 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2821, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3174, PETRI_PLACES=261, PETRI_TRANSITIONS=198} [2021-10-13 22:47:06,383 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 195 predicate places. [2021-10-13 22:47:06,383 INFO L470 AbstractCegarLoop]: Abstraction has has 261 places, 198 transitions, 3174 flow [2021-10-13 22:47:06,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 54.142857142857146) internal successors, (758), 14 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:06,383 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:06,383 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:47:06,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-10-13 22:47:06,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:06,608 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:06,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:06,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1824698719, now seen corresponding path program 21 times [2021-10-13 22:47:06,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:06,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179931298] [2021-10-13 22:47:06,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:06,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:06,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:06,712 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:06,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:06,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179931298] [2021-10-13 22:47:06,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179931298] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:06,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114192028] [2021-10-13 22:47:06,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:47:06,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:06,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:06,715 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 22:47:06,716 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 22:47:07,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-13 22:47:07,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:07,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 22:47:07,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:07,524 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:07,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114192028] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:07,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:07,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-10-13 22:47:07,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670609575] [2021-10-13 22:47:07,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 22:47:07,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:07,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 22:47:07,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-10-13 22:47:07,526 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:47:07,527 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 198 transitions, 3174 flow. Second operand has 15 states, 15 states have (on average 54.13333333333333) internal successors, (812), 15 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:07,527 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:07,527 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:47:07,527 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:08,030 INFO L129 PetriNetUnfolder]: 146/925 cut-off events. [2021-10-13 22:47:08,031 INFO L130 PetriNetUnfolder]: For 37707/37882 co-relation queries the response was YES. [2021-10-13 22:47:08,038 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5172 conditions, 925 events. 146/925 cut-off events. For 37707/37882 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 6195 event pairs, 0 based on Foata normal form. 71/904 useless extension candidates. Maximal degree in co-relation 5045. Up to 147 conditions per place. [2021-10-13 22:47:08,044 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 53 selfloop transitions, 135 changer transitions 14/246 dead transitions. [2021-10-13 22:47:08,044 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 246 transitions, 5739 flow [2021-10-13 22:47:08,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 22:47:08,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-13 22:47:08,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1560 transitions. [2021-10-13 22:47:08,049 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8441558441558441 [2021-10-13 22:47:08,049 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1560 transitions. [2021-10-13 22:47:08,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1560 transitions. [2021-10-13 22:47:08,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:08,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1560 transitions. [2021-10-13 22:47:08,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 55.714285714285715) internal successors, (1560), 28 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:08,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 66.0) internal successors, (1914), 29 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:08,055 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 66.0) internal successors, (1914), 29 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:08,055 INFO L186 Difference]: Start difference. First operand has 261 places, 198 transitions, 3174 flow. Second operand 28 states and 1560 transitions. [2021-10-13 22:47:08,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 246 transitions, 5739 flow [2021-10-13 22:47:08,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 246 transitions, 5284 flow, removed 136 selfloop flow, removed 19 redundant places. [2021-10-13 22:47:08,149 INFO L242 Difference]: Finished difference. Result has 277 places, 210 transitions, 3750 flow [2021-10-13 22:47:08,149 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2897, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3750, PETRI_PLACES=277, PETRI_TRANSITIONS=210} [2021-10-13 22:47:08,149 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 211 predicate places. [2021-10-13 22:47:08,149 INFO L470 AbstractCegarLoop]: Abstraction has has 277 places, 210 transitions, 3750 flow [2021-10-13 22:47:08,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 54.13333333333333) internal successors, (812), 15 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:08,150 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:08,150 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:47:08,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-13 22:47:08,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-10-13 22:47:08,363 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:08,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:08,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1066863621, now seen corresponding path program 22 times [2021-10-13 22:47:08,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:08,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475906945] [2021-10-13 22:47:08,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:08,364 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:08,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:08,463 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 22:47:08,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:08,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475906945] [2021-10-13 22:47:08,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475906945] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:08,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894347037] [2021-10-13 22:47:08,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:47:08,463 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:08,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:08,464 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 22:47:08,465 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 22:47:09,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:47:09,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:09,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 22:47:09,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:09,259 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 22:47:09,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894347037] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:09,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:09,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-10-13 22:47:09,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168999484] [2021-10-13 22:47:09,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 22:47:09,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:09,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 22:47:09,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-10-13 22:47:09,262 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:47:09,262 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 210 transitions, 3750 flow. Second operand has 14 states, 14 states have (on average 54.214285714285715) internal successors, (759), 14 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:09,263 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:09,263 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:47:09,263 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:09,733 INFO L129 PetriNetUnfolder]: 143/928 cut-off events. [2021-10-13 22:47:09,733 INFO L130 PetriNetUnfolder]: For 46194/46397 co-relation queries the response was YES. [2021-10-13 22:47:09,742 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5372 conditions, 928 events. 143/928 cut-off events. For 46194/46397 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 6237 event pairs, 0 based on Foata normal form. 79/913 useless extension candidates. Maximal degree in co-relation 5237. Up to 145 conditions per place. [2021-10-13 22:47:09,749 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 66 selfloop transitions, 112 changer transitions 5/227 dead transitions. [2021-10-13 22:47:09,749 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 227 transitions, 5130 flow [2021-10-13 22:47:09,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 22:47:09,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-10-13 22:47:09,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1279 transitions. [2021-10-13 22:47:09,751 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8425559947299077 [2021-10-13 22:47:09,751 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1279 transitions. [2021-10-13 22:47:09,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1279 transitions. [2021-10-13 22:47:09,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:09,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1279 transitions. [2021-10-13 22:47:09,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 55.608695652173914) internal successors, (1279), 23 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:09,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 66.0) internal successors, (1584), 24 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:09,755 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 66.0) internal successors, (1584), 24 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:09,755 INFO L186 Difference]: Start difference. First operand has 277 places, 210 transitions, 3750 flow. Second operand 23 states and 1279 transitions. [2021-10-13 22:47:09,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 227 transitions, 5130 flow [2021-10-13 22:47:09,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 227 transitions, 4518 flow, removed 212 selfloop flow, removed 20 redundant places. [2021-10-13 22:47:09,886 INFO L242 Difference]: Finished difference. Result has 278 places, 213 transitions, 3586 flow [2021-10-13 22:47:09,887 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3178, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3586, PETRI_PLACES=278, PETRI_TRANSITIONS=213} [2021-10-13 22:47:09,887 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 212 predicate places. [2021-10-13 22:47:09,887 INFO L470 AbstractCegarLoop]: Abstraction has has 278 places, 213 transitions, 3586 flow [2021-10-13 22:47:09,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 54.214285714285715) internal successors, (759), 14 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:09,887 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:09,887 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:47:09,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-13 22:47:10,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-10-13 22:47:10,103 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:10,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:10,104 INFO L82 PathProgramCache]: Analyzing trace with hash 367062356, now seen corresponding path program 23 times [2021-10-13 22:47:10,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:10,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605671522] [2021-10-13 22:47:10,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:10,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:10,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:10,262 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:10,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:10,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605671522] [2021-10-13 22:47:10,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605671522] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:10,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505245171] [2021-10-13 22:47:10,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:47:10,263 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:10,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:10,267 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 22:47:10,283 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 22:47:10,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-13 22:47:10,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:10,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 22:47:10,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:11,148 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:11,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505245171] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:11,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:11,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-10-13 22:47:11,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069970938] [2021-10-13 22:47:11,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 22:47:11,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:11,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 22:47:11,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-10-13 22:47:11,149 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:47:11,150 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 213 transitions, 3586 flow. Second operand has 15 states, 15 states have (on average 54.13333333333333) internal successors, (812), 15 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:11,150 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:11,150 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:47:11,150 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:11,423 INFO L129 PetriNetUnfolder]: 147/949 cut-off events. [2021-10-13 22:47:11,423 INFO L130 PetriNetUnfolder]: For 43657/43857 co-relation queries the response was YES. [2021-10-13 22:47:11,429 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5392 conditions, 949 events. 147/949 cut-off events. For 43657/43857 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 6340 event pairs, 0 based on Foata normal form. 40/888 useless extension candidates. Maximal degree in co-relation 5258. Up to 232 conditions per place. [2021-10-13 22:47:11,434 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 162 selfloop transitions, 19 changer transitions 8/233 dead transitions. [2021-10-13 22:47:11,434 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 233 transitions, 5002 flow [2021-10-13 22:47:11,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 22:47:11,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-13 22:47:11,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 945 transitions. [2021-10-13 22:47:11,436 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8422459893048129 [2021-10-13 22:47:11,436 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 945 transitions. [2021-10-13 22:47:11,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 945 transitions. [2021-10-13 22:47:11,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:11,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 945 transitions. [2021-10-13 22:47:11,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 55.588235294117645) internal successors, (945), 17 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:11,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 66.0) internal successors, (1188), 18 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:11,439 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 66.0) internal successors, (1188), 18 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:11,439 INFO L186 Difference]: Start difference. First operand has 278 places, 213 transitions, 3586 flow. Second operand 17 states and 945 transitions. [2021-10-13 22:47:11,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 233 transitions, 5002 flow [2021-10-13 22:47:11,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 233 transitions, 4637 flow, removed 85 selfloop flow, removed 24 redundant places. [2021-10-13 22:47:11,548 INFO L242 Difference]: Finished difference. Result has 273 places, 215 transitions, 3475 flow [2021-10-13 22:47:11,548 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3303, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3475, PETRI_PLACES=273, PETRI_TRANSITIONS=215} [2021-10-13 22:47:11,548 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 207 predicate places. [2021-10-13 22:47:11,549 INFO L470 AbstractCegarLoop]: Abstraction has has 273 places, 215 transitions, 3475 flow [2021-10-13 22:47:11,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 54.13333333333333) internal successors, (812), 15 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:11,549 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:11,549 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:47:11,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-13 22:47:11,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:11,763 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:11,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:11,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1371319496, now seen corresponding path program 24 times [2021-10-13 22:47:11,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:11,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212678369] [2021-10-13 22:47:11,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:11,764 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:11,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:11,913 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:11,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:11,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212678369] [2021-10-13 22:47:11,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212678369] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:11,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610246387] [2021-10-13 22:47:11,913 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:47:11,914 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:11,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:11,914 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 22:47:11,915 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 22:47:12,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-13 22:47:12,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:12,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 22:47:12,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:12,807 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:12,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610246387] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:12,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:12,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-10-13 22:47:12,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236693723] [2021-10-13 22:47:12,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 22:47:12,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:12,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 22:47:12,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-10-13 22:47:12,808 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:47:12,809 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 215 transitions, 3475 flow. Second operand has 15 states, 15 states have (on average 54.13333333333333) internal successors, (812), 15 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:12,809 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:12,809 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:47:12,809 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:13,131 INFO L129 PetriNetUnfolder]: 149/967 cut-off events. [2021-10-13 22:47:13,132 INFO L130 PetriNetUnfolder]: For 43588/43788 co-relation queries the response was YES. [2021-10-13 22:47:13,137 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5397 conditions, 967 events. 149/967 cut-off events. For 43588/43788 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 6496 event pairs, 0 based on Foata normal form. 45/909 useless extension candidates. Maximal degree in co-relation 5265. Up to 203 conditions per place. [2021-10-13 22:47:13,143 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 145 selfloop transitions, 38 changer transitions 8/235 dead transitions. [2021-10-13 22:47:13,143 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 235 transitions, 4937 flow [2021-10-13 22:47:13,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-13 22:47:13,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-13 22:47:13,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1168 transitions. [2021-10-13 22:47:13,145 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8427128427128427 [2021-10-13 22:47:13,145 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1168 transitions. [2021-10-13 22:47:13,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1168 transitions. [2021-10-13 22:47:13,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:13,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1168 transitions. [2021-10-13 22:47:13,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 55.61904761904762) internal successors, (1168), 21 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:13,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 66.0) internal successors, (1452), 22 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:13,148 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 66.0) internal successors, (1452), 22 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:13,148 INFO L186 Difference]: Start difference. First operand has 273 places, 215 transitions, 3475 flow. Second operand 21 states and 1168 transitions. [2021-10-13 22:47:13,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 235 transitions, 4937 flow [2021-10-13 22:47:13,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 235 transitions, 4795 flow, removed 54 selfloop flow, removed 14 redundant places. [2021-10-13 22:47:13,262 INFO L242 Difference]: Finished difference. Result has 281 places, 217 transitions, 3581 flow [2021-10-13 22:47:13,263 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3363, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3581, PETRI_PLACES=281, PETRI_TRANSITIONS=217} [2021-10-13 22:47:13,263 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 215 predicate places. [2021-10-13 22:47:13,263 INFO L470 AbstractCegarLoop]: Abstraction has has 281 places, 217 transitions, 3581 flow [2021-10-13 22:47:13,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 54.13333333333333) internal successors, (812), 15 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:13,263 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:13,263 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:47:13,293 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 22:47:13,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:13,487 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:13,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:13,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1506649116, now seen corresponding path program 25 times [2021-10-13 22:47:13,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:13,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471450017] [2021-10-13 22:47:13,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:13,488 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:13,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:13,660 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:13,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:13,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471450017] [2021-10-13 22:47:13,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471450017] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:13,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472038863] [2021-10-13 22:47:13,661 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:47:13,661 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:13,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:13,662 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 22:47:13,664 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 22:47:14,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:14,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 22:47:14,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:14,580 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:14,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472038863] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:14,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:14,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-10-13 22:47:14,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125958485] [2021-10-13 22:47:14,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 22:47:14,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:14,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 22:47:14,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-10-13 22:47:14,582 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:47:14,582 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 217 transitions, 3581 flow. Second operand has 16 states, 16 states have (on average 54.1875) internal successors, (867), 16 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 22:47:14,582 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:14,582 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:47:14,583 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:14,953 INFO L129 PetriNetUnfolder]: 153/996 cut-off events. [2021-10-13 22:47:14,953 INFO L130 PetriNetUnfolder]: For 48317/48546 co-relation queries the response was YES. [2021-10-13 22:47:14,958 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5717 conditions, 996 events. 153/996 cut-off events. For 48317/48546 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 6812 event pairs, 0 based on Foata normal form. 51/941 useless extension candidates. Maximal degree in co-relation 5583. Up to 166 conditions per place. [2021-10-13 22:47:14,965 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 122 selfloop transitions, 66 changer transitions 8/240 dead transitions. [2021-10-13 22:47:14,965 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 240 transitions, 5218 flow [2021-10-13 22:47:14,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 22:47:14,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-10-13 22:47:14,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1277 transitions. [2021-10-13 22:47:14,966 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8412384716732543 [2021-10-13 22:47:14,967 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1277 transitions. [2021-10-13 22:47:14,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1277 transitions. [2021-10-13 22:47:14,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:14,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1277 transitions. [2021-10-13 22:47:14,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 55.52173913043478) internal successors, (1277), 23 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:14,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 66.0) internal successors, (1584), 24 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:14,970 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 66.0) internal successors, (1584), 24 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:14,970 INFO L186 Difference]: Start difference. First operand has 281 places, 217 transitions, 3581 flow. Second operand 23 states and 1277 transitions. [2021-10-13 22:47:14,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 240 transitions, 5218 flow [2021-10-13 22:47:15,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 240 transitions, 4992 flow, removed 79 selfloop flow, removed 18 redundant places. [2021-10-13 22:47:15,082 INFO L242 Difference]: Finished difference. Result has 287 places, 221 transitions, 3772 flow [2021-10-13 22:47:15,082 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3427, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3772, PETRI_PLACES=287, PETRI_TRANSITIONS=221} [2021-10-13 22:47:15,083 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 221 predicate places. [2021-10-13 22:47:15,083 INFO L470 AbstractCegarLoop]: Abstraction has has 287 places, 221 transitions, 3772 flow [2021-10-13 22:47:15,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.1875) internal successors, (867), 16 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 22:47:15,083 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:15,083 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:47:15,111 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 22:47:15,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:15,303 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:15,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:15,304 INFO L82 PathProgramCache]: Analyzing trace with hash -603275160, now seen corresponding path program 26 times [2021-10-13 22:47:15,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:15,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346733099] [2021-10-13 22:47:15,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:15,304 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:15,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:15,411 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:15,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:15,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346733099] [2021-10-13 22:47:15,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346733099] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:15,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567183504] [2021-10-13 22:47:15,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:47:15,412 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:15,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:15,413 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 22:47:15,427 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 22:47:16,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:47:16,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:16,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 22:47:16,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:16,372 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:16,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567183504] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:16,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:16,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-10-13 22:47:16,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405922071] [2021-10-13 22:47:16,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 22:47:16,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:16,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 22:47:16,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-10-13 22:47:16,373 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:47:16,374 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 221 transitions, 3772 flow. Second operand has 15 states, 15 states have (on average 54.13333333333333) internal successors, (812), 15 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:16,374 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:16,374 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:47:16,374 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:16,732 INFO L129 PetriNetUnfolder]: 155/1021 cut-off events. [2021-10-13 22:47:16,732 INFO L130 PetriNetUnfolder]: For 49613/49818 co-relation queries the response was YES. [2021-10-13 22:47:16,738 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5873 conditions, 1021 events. 155/1021 cut-off events. For 49613/49818 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 7000 event pairs, 0 based on Foata normal form. 57/969 useless extension candidates. Maximal degree in co-relation 5736. Up to 163 conditions per place. [2021-10-13 22:47:16,742 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 105 selfloop transitions, 84 changer transitions 8/241 dead transitions. [2021-10-13 22:47:16,742 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 241 transitions, 5344 flow [2021-10-13 22:47:16,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 22:47:16,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-13 22:47:16,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1333 transitions. [2021-10-13 22:47:16,744 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8415404040404041 [2021-10-13 22:47:16,744 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1333 transitions. [2021-10-13 22:47:16,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1333 transitions. [2021-10-13 22:47:16,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:16,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1333 transitions. [2021-10-13 22:47:16,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 55.541666666666664) internal successors, (1333), 24 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:16,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:16,747 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:16,747 INFO L186 Difference]: Start difference. First operand has 287 places, 221 transitions, 3772 flow. Second operand 24 states and 1333 transitions. [2021-10-13 22:47:16,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 241 transitions, 5344 flow [2021-10-13 22:47:16,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 241 transitions, 5080 flow, removed 80 selfloop flow, removed 19 redundant places. [2021-10-13 22:47:16,838 INFO L242 Difference]: Finished difference. Result has 293 places, 223 transitions, 3906 flow [2021-10-13 22:47:16,838 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3580, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3906, PETRI_PLACES=293, PETRI_TRANSITIONS=223} [2021-10-13 22:47:16,839 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 227 predicate places. [2021-10-13 22:47:16,839 INFO L470 AbstractCegarLoop]: Abstraction has has 293 places, 223 transitions, 3906 flow [2021-10-13 22:47:16,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 54.13333333333333) internal successors, (812), 15 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:16,839 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:16,839 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:47:16,856 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 22:47:17,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-13 22:47:17,040 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:17,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:17,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1130295590, now seen corresponding path program 27 times [2021-10-13 22:47:17,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:17,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652469387] [2021-10-13 22:47:17,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:17,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:17,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:17,152 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:17,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:17,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652469387] [2021-10-13 22:47:17,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652469387] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:17,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723463025] [2021-10-13 22:47:17,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:47:17,153 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:17,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:17,154 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 22:47:17,185 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 22:47:17,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-13 22:47:17,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:17,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 22:47:17,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:18,161 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:18,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723463025] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:18,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:18,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-10-13 22:47:18,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43943709] [2021-10-13 22:47:18,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 22:47:18,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:18,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 22:47:18,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-10-13 22:47:18,163 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:47:18,163 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 223 transitions, 3906 flow. Second operand has 16 states, 16 states have (on average 54.1875) internal successors, (867), 16 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 22:47:18,163 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:18,164 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:47:18,164 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:18,602 INFO L129 PetriNetUnfolder]: 161/1068 cut-off events. [2021-10-13 22:47:18,602 INFO L130 PetriNetUnfolder]: For 52926/53134 co-relation queries the response was YES. [2021-10-13 22:47:18,611 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6235 conditions, 1068 events. 161/1068 cut-off events. For 52926/53134 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 7491 event pairs, 0 based on Foata normal form. 80/1038 useless extension candidates. Maximal degree in co-relation 6096. Up to 175 conditions per place. [2021-10-13 22:47:18,616 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 62 selfloop transitions, 135 changer transitions 8/249 dead transitions. [2021-10-13 22:47:18,616 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 249 transitions, 5794 flow [2021-10-13 22:47:18,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-13 22:47:18,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-10-13 22:47:18,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1501 transitions. [2021-10-13 22:47:18,625 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8423120089786756 [2021-10-13 22:47:18,625 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1501 transitions. [2021-10-13 22:47:18,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1501 transitions. [2021-10-13 22:47:18,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:18,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1501 transitions. [2021-10-13 22:47:18,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 55.592592592592595) internal successors, (1501), 27 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:18,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 66.0) internal successors, (1848), 28 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:18,630 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 66.0) internal successors, (1848), 28 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:18,630 INFO L186 Difference]: Start difference. First operand has 293 places, 223 transitions, 3906 flow. Second operand 27 states and 1501 transitions. [2021-10-13 22:47:18,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 249 transitions, 5794 flow [2021-10-13 22:47:18,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 249 transitions, 5466 flow, removed 86 selfloop flow, removed 22 redundant places. [2021-10-13 22:47:18,763 INFO L242 Difference]: Finished difference. Result has 300 places, 230 transitions, 4292 flow [2021-10-13 22:47:18,764 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3662, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4292, PETRI_PLACES=300, PETRI_TRANSITIONS=230} [2021-10-13 22:47:18,764 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 234 predicate places. [2021-10-13 22:47:18,764 INFO L470 AbstractCegarLoop]: Abstraction has has 300 places, 230 transitions, 4292 flow [2021-10-13 22:47:18,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.1875) internal successors, (867), 16 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 22:47:18,764 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:18,764 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:47:18,790 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 22:47:18,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-13 22:47:18,983 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:18,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:18,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1702377052, now seen corresponding path program 28 times [2021-10-13 22:47:18,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:18,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970594541] [2021-10-13 22:47:18,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:18,984 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:18,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:19,098 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:19,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:19,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970594541] [2021-10-13 22:47:19,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970594541] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:19,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83171279] [2021-10-13 22:47:19,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:47:19,098 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:19,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:19,099 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 22:47:19,100 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 22:47:19,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:47:19,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:19,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 22:47:19,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:19,997 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:19,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83171279] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:19,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:19,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-10-13 22:47:19,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991573793] [2021-10-13 22:47:19,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 22:47:19,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:19,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 22:47:19,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-10-13 22:47:19,999 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:47:19,999 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 230 transitions, 4292 flow. Second operand has 15 states, 15 states have (on average 54.13333333333333) internal successors, (812), 15 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:19,999 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:19,999 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:47:20,000 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:20,498 INFO L129 PetriNetUnfolder]: 167/1085 cut-off events. [2021-10-13 22:47:20,498 INFO L130 PetriNetUnfolder]: For 59978/60224 co-relation queries the response was YES. [2021-10-13 22:47:20,506 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6642 conditions, 1085 events. 167/1085 cut-off events. For 59978/60224 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 7655 event pairs, 0 based on Foata normal form. 90/1066 useless extension candidates. Maximal degree in co-relation 6500. Up to 183 conditions per place. [2021-10-13 22:47:20,510 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 59 selfloop transitions, 146 changer transitions 8/257 dead transitions. [2021-10-13 22:47:20,511 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 257 transitions, 6358 flow [2021-10-13 22:47:20,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 22:47:20,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-13 22:47:20,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1558 transitions. [2021-10-13 22:47:20,516 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8430735930735931 [2021-10-13 22:47:20,516 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1558 transitions. [2021-10-13 22:47:20,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1558 transitions. [2021-10-13 22:47:20,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:20,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1558 transitions. [2021-10-13 22:47:20,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 55.642857142857146) internal successors, (1558), 28 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:20,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 66.0) internal successors, (1914), 29 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:20,520 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 66.0) internal successors, (1914), 29 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:20,520 INFO L186 Difference]: Start difference. First operand has 300 places, 230 transitions, 4292 flow. Second operand 28 states and 1558 transitions. [2021-10-13 22:47:20,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 257 transitions, 6358 flow [2021-10-13 22:47:20,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 257 transitions, 5903 flow, removed 121 selfloop flow, removed 22 redundant places. [2021-10-13 22:47:20,635 INFO L242 Difference]: Finished difference. Result has 309 places, 236 transitions, 4583 flow [2021-10-13 22:47:20,635 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3899, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=4583, PETRI_PLACES=309, PETRI_TRANSITIONS=236} [2021-10-13 22:47:20,635 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 243 predicate places. [2021-10-13 22:47:20,635 INFO L470 AbstractCegarLoop]: Abstraction has has 309 places, 236 transitions, 4583 flow [2021-10-13 22:47:20,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 54.13333333333333) internal successors, (812), 15 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:20,635 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:20,635 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:47:20,654 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 22:47:20,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-13 22:47:20,839 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:20,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:20,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1370924367, now seen corresponding path program 29 times [2021-10-13 22:47:20,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:20,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119042816] [2021-10-13 22:47:20,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:20,840 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:20,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:20,941 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 22:47:20,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:20,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119042816] [2021-10-13 22:47:20,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119042816] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:20,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103769067] [2021-10-13 22:47:20,942 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:47:20,942 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:20,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:20,943 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 22:47:20,944 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 22:47:21,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 22:47:21,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:21,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 22:47:21,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:21,915 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 22:47:21,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103769067] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:21,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:21,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-10-13 22:47:21,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7682589] [2021-10-13 22:47:21,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 22:47:21,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:21,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 22:47:21,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-10-13 22:47:21,917 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:47:21,917 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 236 transitions, 4583 flow. Second operand has 16 states, 16 states have (on average 54.1875) internal successors, (867), 16 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 22:47:21,917 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:21,917 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:47:21,917 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:22,419 INFO L129 PetriNetUnfolder]: 190/1260 cut-off events. [2021-10-13 22:47:22,419 INFO L130 PetriNetUnfolder]: For 76788/77000 co-relation queries the response was YES. [2021-10-13 22:47:22,429 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8129 conditions, 1260 events. 190/1260 cut-off events. For 76788/77000 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 9145 event pairs, 0 based on Foata normal form. 89/1220 useless extension candidates. Maximal degree in co-relation 7983. Up to 217 conditions per place. [2021-10-13 22:47:22,434 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 76 selfloop transitions, 163 changer transitions 11/294 dead transitions. [2021-10-13 22:47:22,434 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 294 transitions, 8026 flow [2021-10-13 22:47:22,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 22:47:22,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-13 22:47:22,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1559 transitions. [2021-10-13 22:47:22,436 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8436147186147186 [2021-10-13 22:47:22,436 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1559 transitions. [2021-10-13 22:47:22,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1559 transitions. [2021-10-13 22:47:22,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:22,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1559 transitions. [2021-10-13 22:47:22,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 55.67857142857143) internal successors, (1559), 28 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:22,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 66.0) internal successors, (1914), 29 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:22,439 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 66.0) internal successors, (1914), 29 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:22,439 INFO L186 Difference]: Start difference. First operand has 309 places, 236 transitions, 4583 flow. Second operand 28 states and 1559 transitions. [2021-10-13 22:47:22,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 294 transitions, 8026 flow [2021-10-13 22:47:22,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 294 transitions, 7353 flow, removed 216 selfloop flow, removed 24 redundant places. [2021-10-13 22:47:22,582 INFO L242 Difference]: Finished difference. Result has 318 places, 259 transitions, 5574 flow [2021-10-13 22:47:22,583 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=4142, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=5574, PETRI_PLACES=318, PETRI_TRANSITIONS=259} [2021-10-13 22:47:22,583 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 252 predicate places. [2021-10-13 22:47:22,583 INFO L470 AbstractCegarLoop]: Abstraction has has 318 places, 259 transitions, 5574 flow [2021-10-13 22:47:22,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.1875) internal successors, (867), 16 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 22:47:22,583 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:22,584 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:47:22,601 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 22:47:22,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-13 22:47:22,784 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:22,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:22,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1891466820, now seen corresponding path program 30 times [2021-10-13 22:47:22,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:22,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809871700] [2021-10-13 22:47:22,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:22,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:22,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:22,905 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:22,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:22,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809871700] [2021-10-13 22:47:22,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809871700] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:22,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695221093] [2021-10-13 22:47:22,905 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:47:22,905 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:22,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:22,907 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 22:47:22,948 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 22:47:23,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-10-13 22:47:23,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:23,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 22:47:23,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:23,970 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:23,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695221093] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:23,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:23,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-10-13 22:47:23,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54754497] [2021-10-13 22:47:23,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 22:47:23,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:23,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 22:47:23,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-10-13 22:47:23,971 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:47:23,972 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 259 transitions, 5574 flow. Second operand has 18 states, 18 states have (on average 54.111111111111114) internal successors, (974), 18 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:23,972 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:23,972 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:47:23,972 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:24,617 INFO L129 PetriNetUnfolder]: 202/1329 cut-off events. [2021-10-13 22:47:24,617 INFO L130 PetriNetUnfolder]: For 91961/92217 co-relation queries the response was YES. [2021-10-13 22:47:24,635 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9079 conditions, 1329 events. 202/1329 cut-off events. For 91961/92217 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 9639 event pairs, 0 based on Foata normal form. 95/1289 useless extension candidates. Maximal degree in co-relation 8929. Up to 233 conditions per place. [2021-10-13 22:47:24,644 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 64 selfloop transitions, 191 changer transitions 14/313 dead transitions. [2021-10-13 22:47:24,644 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 313 transitions, 9379 flow [2021-10-13 22:47:24,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-13 22:47:24,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-10-13 22:47:24,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1949 transitions. [2021-10-13 22:47:24,646 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8437229437229438 [2021-10-13 22:47:24,646 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1949 transitions. [2021-10-13 22:47:24,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1949 transitions. [2021-10-13 22:47:24,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:24,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1949 transitions. [2021-10-13 22:47:24,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 55.68571428571428) internal successors, (1949), 35 states have internal predecessors, (1949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:24,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 66.0) internal successors, (2376), 36 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:24,651 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 66.0) internal successors, (2376), 36 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:24,652 INFO L186 Difference]: Start difference. First operand has 318 places, 259 transitions, 5574 flow. Second operand 35 states and 1949 transitions. [2021-10-13 22:47:24,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 313 transitions, 9379 flow [2021-10-13 22:47:24,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 313 transitions, 8390 flow, removed 394 selfloop flow, removed 20 redundant places. [2021-10-13 22:47:24,823 INFO L242 Difference]: Finished difference. Result has 340 places, 271 transitions, 6053 flow [2021-10-13 22:47:24,823 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=4817, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=6053, PETRI_PLACES=340, PETRI_TRANSITIONS=271} [2021-10-13 22:47:24,823 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 274 predicate places. [2021-10-13 22:47:24,823 INFO L470 AbstractCegarLoop]: Abstraction has has 340 places, 271 transitions, 6053 flow [2021-10-13 22:47:24,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.111111111111114) internal successors, (974), 18 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:24,823 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:24,823 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:47:24,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-10-13 22:47:25,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-13 22:47:25,024 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:25,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:25,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1517793923, now seen corresponding path program 31 times [2021-10-13 22:47:25,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:25,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501290981] [2021-10-13 22:47:25,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:25,025 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:25,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:25,186 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:25,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:25,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501290981] [2021-10-13 22:47:25,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501290981] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:25,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928521562] [2021-10-13 22:47:25,187 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:47:25,187 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:25,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:25,188 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 22:47:25,209 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 22:47:26,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:26,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 22:47:26,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:26,227 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:26,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928521562] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:26,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:26,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-10-13 22:47:26,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316108705] [2021-10-13 22:47:26,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 22:47:26,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:26,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 22:47:26,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-10-13 22:47:26,228 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:47:26,229 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 271 transitions, 6053 flow. Second operand has 18 states, 18 states have (on average 54.111111111111114) internal successors, (974), 18 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:26,229 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:26,229 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:47:26,229 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:26,821 INFO L129 PetriNetUnfolder]: 208/1375 cut-off events. [2021-10-13 22:47:26,821 INFO L130 PetriNetUnfolder]: For 111718/111966 co-relation queries the response was YES. [2021-10-13 22:47:26,835 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9603 conditions, 1375 events. 208/1375 cut-off events. For 111718/111966 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 9968 event pairs, 0 based on Foata normal form. 93/1327 useless extension candidates. Maximal degree in co-relation 9444. Up to 225 conditions per place. [2021-10-13 22:47:26,841 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 73 selfloop transitions, 185 changer transitions 8/310 dead transitions. [2021-10-13 22:47:26,842 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 310 transitions, 9355 flow [2021-10-13 22:47:26,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 22:47:26,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-10-13 22:47:26,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1780 transitions. [2021-10-13 22:47:26,843 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8428030303030303 [2021-10-13 22:47:26,843 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1780 transitions. [2021-10-13 22:47:26,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1780 transitions. [2021-10-13 22:47:26,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:26,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1780 transitions. [2021-10-13 22:47:26,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.625) internal successors, (1780), 32 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:26,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 66.0) internal successors, (2178), 33 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:26,847 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 66.0) internal successors, (2178), 33 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:26,847 INFO L186 Difference]: Start difference. First operand has 340 places, 271 transitions, 6053 flow. Second operand 32 states and 1780 transitions. [2021-10-13 22:47:26,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 310 transitions, 9355 flow [2021-10-13 22:47:27,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 310 transitions, 8029 flow, removed 543 selfloop flow, removed 25 redundant places. [2021-10-13 22:47:27,139 INFO L242 Difference]: Finished difference. Result has 348 places, 281 transitions, 6094 flow [2021-10-13 22:47:27,140 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=5235, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=6094, PETRI_PLACES=348, PETRI_TRANSITIONS=281} [2021-10-13 22:47:27,140 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 282 predicate places. [2021-10-13 22:47:27,140 INFO L470 AbstractCegarLoop]: Abstraction has has 348 places, 281 transitions, 6094 flow [2021-10-13 22:47:27,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.111111111111114) internal successors, (974), 18 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:27,140 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:27,141 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:47:27,159 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 22:47:27,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:27,341 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:27,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:27,341 INFO L82 PathProgramCache]: Analyzing trace with hash -732678017, now seen corresponding path program 32 times [2021-10-13 22:47:27,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:27,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219446661] [2021-10-13 22:47:27,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:27,342 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:27,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:27,486 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:27,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:27,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219446661] [2021-10-13 22:47:27,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219446661] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:27,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225512726] [2021-10-13 22:47:27,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:47:27,487 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:27,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:27,488 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 22:47:27,488 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 22:47:28,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:47:28,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:28,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 22:47:28,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:28,571 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:28,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225512726] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:28,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:28,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-10-13 22:47:28,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205826815] [2021-10-13 22:47:28,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 22:47:28,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:28,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 22:47:28,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-10-13 22:47:28,573 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:47:28,573 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 281 transitions, 6094 flow. Second operand has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:28,574 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:28,574 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:47:28,574 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:29,272 INFO L129 PetriNetUnfolder]: 214/1406 cut-off events. [2021-10-13 22:47:29,273 INFO L130 PetriNetUnfolder]: For 115164/115465 co-relation queries the response was YES. [2021-10-13 22:47:29,285 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9658 conditions, 1406 events. 214/1406 cut-off events. For 115164/115465 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 10110 event pairs, 0 based on Foata normal form. 97/1359 useless extension candidates. Maximal degree in co-relation 9497. Up to 225 conditions per place. [2021-10-13 22:47:29,291 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 69 selfloop transitions, 205 changer transitions 8/326 dead transitions. [2021-10-13 22:47:29,291 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 326 transitions, 9549 flow [2021-10-13 22:47:29,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-13 22:47:29,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-10-13 22:47:29,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1891 transitions. [2021-10-13 22:47:29,293 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8426916221033868 [2021-10-13 22:47:29,293 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1891 transitions. [2021-10-13 22:47:29,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1891 transitions. [2021-10-13 22:47:29,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:29,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1891 transitions. [2021-10-13 22:47:29,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 55.61764705882353) internal successors, (1891), 34 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:29,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 66.0) internal successors, (2310), 35 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:29,298 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 66.0) internal successors, (2310), 35 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:29,298 INFO L186 Difference]: Start difference. First operand has 348 places, 281 transitions, 6094 flow. Second operand 34 states and 1891 transitions. [2021-10-13 22:47:29,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 326 transitions, 9549 flow [2021-10-13 22:47:29,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 326 transitions, 8920 flow, removed 170 selfloop flow, removed 25 redundant places. [2021-10-13 22:47:29,496 INFO L242 Difference]: Finished difference. Result has 360 places, 287 transitions, 6411 flow [2021-10-13 22:47:29,496 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=5559, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=6411, PETRI_PLACES=360, PETRI_TRANSITIONS=287} [2021-10-13 22:47:29,496 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 294 predicate places. [2021-10-13 22:47:29,496 INFO L470 AbstractCegarLoop]: Abstraction has has 360 places, 287 transitions, 6411 flow [2021-10-13 22:47:29,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:29,497 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:29,497 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:47:29,516 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 22:47:29,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:29,702 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:29,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:29,702 INFO L82 PathProgramCache]: Analyzing trace with hash 97842776, now seen corresponding path program 33 times [2021-10-13 22:47:29,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:29,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057569309] [2021-10-13 22:47:29,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:29,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:29,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:29,960 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:29,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:29,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057569309] [2021-10-13 22:47:29,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057569309] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:29,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840443545] [2021-10-13 22:47:29,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:47:29,961 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:29,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:29,962 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 22:47:29,962 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 22:47:30,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-10-13 22:47:30,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:30,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 22:47:30,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:31,227 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:31,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840443545] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:31,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:31,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-10-13 22:47:31,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702051748] [2021-10-13 22:47:31,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 22:47:31,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:31,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 22:47:31,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-10-13 22:47:31,230 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:47:31,230 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 287 transitions, 6411 flow. Second operand has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:31,230 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:31,230 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:47:31,230 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:31,741 INFO L129 PetriNetUnfolder]: 220/1467 cut-off events. [2021-10-13 22:47:31,741 INFO L130 PetriNetUnfolder]: For 126858/127159 co-relation queries the response was YES. [2021-10-13 22:47:31,753 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10262 conditions, 1467 events. 220/1467 cut-off events. For 126858/127159 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 10612 event pairs, 0 based on Foata normal form. 43/1352 useless extension candidates. Maximal degree in co-relation 10096. Up to 349 conditions per place. [2021-10-13 22:47:31,763 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 238 selfloop transitions, 27 changer transitions 8/317 dead transitions. [2021-10-13 22:47:31,763 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 317 transitions, 8820 flow [2021-10-13 22:47:31,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-13 22:47:31,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-13 22:47:31,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1165 transitions. [2021-10-13 22:47:31,764 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8405483405483406 [2021-10-13 22:47:31,764 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1165 transitions. [2021-10-13 22:47:31,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1165 transitions. [2021-10-13 22:47:31,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:31,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1165 transitions. [2021-10-13 22:47:31,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 55.476190476190474) internal successors, (1165), 21 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:31,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 66.0) internal successors, (1452), 22 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:31,767 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 66.0) internal successors, (1452), 22 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:31,767 INFO L186 Difference]: Start difference. First operand has 360 places, 287 transitions, 6411 flow. Second operand 21 states and 1165 transitions. [2021-10-13 22:47:31,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 317 transitions, 8820 flow [2021-10-13 22:47:31,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 317 transitions, 8181 flow, removed 143 selfloop flow, removed 28 redundant places. [2021-10-13 22:47:31,990 INFO L242 Difference]: Finished difference. Result has 356 places, 293 transitions, 6206 flow [2021-10-13 22:47:31,991 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=5826, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6206, PETRI_PLACES=356, PETRI_TRANSITIONS=293} [2021-10-13 22:47:31,991 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 290 predicate places. [2021-10-13 22:47:31,991 INFO L470 AbstractCegarLoop]: Abstraction has has 356 places, 293 transitions, 6206 flow [2021-10-13 22:47:31,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:31,991 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:31,992 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:47:32,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-10-13 22:47:32,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:32,207 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:32,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:32,208 INFO L82 PathProgramCache]: Analyzing trace with hash 2005470124, now seen corresponding path program 34 times [2021-10-13 22:47:32,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:32,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818085045] [2021-10-13 22:47:32,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:32,208 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:32,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:32,421 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:32,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:32,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818085045] [2021-10-13 22:47:32,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818085045] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:32,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764369051] [2021-10-13 22:47:32,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:47:32,421 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:32,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:32,422 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 22:47:32,424 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 22:47:33,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:47:33,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:33,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 22:47:33,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:33,771 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 1 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:33,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764369051] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:33,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:33,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-10-13 22:47:33,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521422545] [2021-10-13 22:47:33,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 22:47:33,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:33,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 22:47:33,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-10-13 22:47:33,772 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:47:33,773 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 293 transitions, 6206 flow. Second operand has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:33,773 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:33,773 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:47:33,773 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:34,301 INFO L129 PetriNetUnfolder]: 234/1600 cut-off events. [2021-10-13 22:47:34,302 INFO L130 PetriNetUnfolder]: For 139503/139805 co-relation queries the response was YES. [2021-10-13 22:47:34,313 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11028 conditions, 1600 events. 234/1600 cut-off events. For 139503/139805 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 11985 event pairs, 0 based on Foata normal form. 44/1471 useless extension candidates. Maximal degree in co-relation 10858. Up to 337 conditions per place. [2021-10-13 22:47:34,321 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 231 selfloop transitions, 49 changer transitions 8/332 dead transitions. [2021-10-13 22:47:34,321 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 332 transitions, 9111 flow [2021-10-13 22:47:34,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 22:47:34,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-13 22:47:34,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1332 transitions. [2021-10-13 22:47:34,324 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8409090909090909 [2021-10-13 22:47:34,324 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1332 transitions. [2021-10-13 22:47:34,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1332 transitions. [2021-10-13 22:47:34,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:34,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1332 transitions. [2021-10-13 22:47:34,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 55.5) internal successors, (1332), 24 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:34,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:34,327 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:34,327 INFO L186 Difference]: Start difference. First operand has 356 places, 293 transitions, 6206 flow. Second operand 24 states and 1332 transitions. [2021-10-13 22:47:34,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 332 transitions, 9111 flow [2021-10-13 22:47:34,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 332 transitions, 8898 flow, removed 86 selfloop flow, removed 16 redundant places. [2021-10-13 22:47:34,559 INFO L242 Difference]: Finished difference. Result has 373 places, 307 transitions, 6882 flow [2021-10-13 22:47:34,559 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=6049, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=6882, PETRI_PLACES=373, PETRI_TRANSITIONS=307} [2021-10-13 22:47:34,560 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 307 predicate places. [2021-10-13 22:47:34,560 INFO L470 AbstractCegarLoop]: Abstraction has has 373 places, 307 transitions, 6882 flow [2021-10-13 22:47:34,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:34,560 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:34,560 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:47:34,579 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 22:47:34,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-10-13 22:47:34,761 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:34,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:34,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1956676240, now seen corresponding path program 35 times [2021-10-13 22:47:34,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:34,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459441170] [2021-10-13 22:47:34,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:34,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:34,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:34,932 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:34,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:34,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459441170] [2021-10-13 22:47:34,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459441170] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:34,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707851095] [2021-10-13 22:47:34,933 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:47:34,933 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:34,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:34,935 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 22:47:34,936 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 22:47:35,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-10-13 22:47:35,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:35,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 22:47:35,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:36,273 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:36,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707851095] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:36,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:36,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-10-13 22:47:36,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171169497] [2021-10-13 22:47:36,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 22:47:36,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:36,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 22:47:36,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-10-13 22:47:36,275 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:47:36,276 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 307 transitions, 6882 flow. Second operand has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:36,276 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:36,276 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:47:36,276 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:36,826 INFO L129 PetriNetUnfolder]: 240/1654 cut-off events. [2021-10-13 22:47:36,826 INFO L130 PetriNetUnfolder]: For 149964/150266 co-relation queries the response was YES. [2021-10-13 22:47:36,845 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11586 conditions, 1654 events. 240/1654 cut-off events. For 149964/150266 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 12463 event pairs, 0 based on Foata normal form. 47/1522 useless extension candidates. Maximal degree in co-relation 11406. Up to 313 conditions per place. [2021-10-13 22:47:36,915 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 217 selfloop transitions, 68 changer transitions 8/337 dead transitions. [2021-10-13 22:47:36,915 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 337 transitions, 9487 flow [2021-10-13 22:47:36,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-13 22:47:36,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-10-13 22:47:36,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1388 transitions. [2021-10-13 22:47:36,919 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8412121212121212 [2021-10-13 22:47:36,919 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1388 transitions. [2021-10-13 22:47:36,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1388 transitions. [2021-10-13 22:47:36,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:36,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1388 transitions. [2021-10-13 22:47:36,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 55.52) internal successors, (1388), 25 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:36,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 66.0) internal successors, (1716), 26 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:36,923 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 66.0) internal successors, (1716), 26 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:36,923 INFO L186 Difference]: Start difference. First operand has 373 places, 307 transitions, 6882 flow. Second operand 25 states and 1388 transitions. [2021-10-13 22:47:36,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 337 transitions, 9487 flow [2021-10-13 22:47:37,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 337 transitions, 9211 flow, removed 117 selfloop flow, removed 13 redundant places. [2021-10-13 22:47:37,198 INFO L242 Difference]: Finished difference. Result has 388 places, 313 transitions, 7196 flow [2021-10-13 22:47:37,198 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=6698, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=7196, PETRI_PLACES=388, PETRI_TRANSITIONS=313} [2021-10-13 22:47:37,199 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 322 predicate places. [2021-10-13 22:47:37,199 INFO L470 AbstractCegarLoop]: Abstraction has has 388 places, 313 transitions, 7196 flow [2021-10-13 22:47:37,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:37,199 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:37,199 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:47:37,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-13 22:47:37,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-10-13 22:47:37,400 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:37,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:37,400 INFO L82 PathProgramCache]: Analyzing trace with hash -438338680, now seen corresponding path program 36 times [2021-10-13 22:47:37,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:37,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819336843] [2021-10-13 22:47:37,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:37,400 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:37,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:37,554 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:37,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:37,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819336843] [2021-10-13 22:47:37,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819336843] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:37,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562541889] [2021-10-13 22:47:37,555 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:47:37,555 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:37,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:37,556 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 22:47:37,557 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 22:47:38,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-10-13 22:47:38,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:38,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 22:47:38,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:38,902 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:38,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562541889] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:38,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:38,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-10-13 22:47:38,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481916789] [2021-10-13 22:47:38,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 22:47:38,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:38,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 22:47:38,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-10-13 22:47:38,904 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:47:38,905 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 313 transitions, 7196 flow. Second operand has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:38,905 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:38,905 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:47:38,905 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:39,525 INFO L129 PetriNetUnfolder]: 256/1791 cut-off events. [2021-10-13 22:47:39,526 INFO L130 PetriNetUnfolder]: For 162876/163214 co-relation queries the response was YES. [2021-10-13 22:47:39,544 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12626 conditions, 1791 events. 256/1791 cut-off events. For 162876/163214 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 14021 event pairs, 0 based on Foata normal form. 72/1671 useless extension candidates. Maximal degree in co-relation 12442. Up to 293 conditions per place. [2021-10-13 22:47:39,552 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 138 selfloop transitions, 164 changer transitions 8/354 dead transitions. [2021-10-13 22:47:39,552 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 354 transitions, 10329 flow [2021-10-13 22:47:39,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 22:47:39,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-10-13 22:47:39,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1665 transitions. [2021-10-13 22:47:39,553 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8409090909090909 [2021-10-13 22:47:39,553 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1665 transitions. [2021-10-13 22:47:39,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1665 transitions. [2021-10-13 22:47:39,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:39,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1665 transitions. [2021-10-13 22:47:39,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 55.5) internal successors, (1665), 30 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:39,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:39,557 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:39,558 INFO L186 Difference]: Start difference. First operand has 388 places, 313 transitions, 7196 flow. Second operand 30 states and 1665 transitions. [2021-10-13 22:47:39,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 354 transitions, 10329 flow [2021-10-13 22:47:39,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 354 transitions, 10006 flow, removed 113 selfloop flow, removed 20 redundant places. [2021-10-13 22:47:39,936 INFO L242 Difference]: Finished difference. Result has 403 places, 329 transitions, 8088 flow [2021-10-13 22:47:39,936 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=6973, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=8088, PETRI_PLACES=403, PETRI_TRANSITIONS=329} [2021-10-13 22:47:39,937 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 337 predicate places. [2021-10-13 22:47:39,937 INFO L470 AbstractCegarLoop]: Abstraction has has 403 places, 329 transitions, 8088 flow [2021-10-13 22:47:39,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:39,937 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:39,937 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:47:39,956 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 22:47:40,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-10-13 22:47:40,138 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:40,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:40,138 INFO L82 PathProgramCache]: Analyzing trace with hash -839069016, now seen corresponding path program 37 times [2021-10-13 22:47:40,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:40,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750323773] [2021-10-13 22:47:40,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:40,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:40,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:40,284 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:40,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:40,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750323773] [2021-10-13 22:47:40,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750323773] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:40,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986480674] [2021-10-13 22:47:40,285 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:47:40,285 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:40,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:40,286 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 22:47:40,287 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 22:47:41,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:41,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 22:47:41,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:41,558 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:41,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986480674] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:41,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:41,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-10-13 22:47:41,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647879] [2021-10-13 22:47:41,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 22:47:41,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:41,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 22:47:41,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-10-13 22:47:41,560 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:47:41,560 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 329 transitions, 8088 flow. Second operand has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:41,560 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:41,560 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:47:41,560 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:42,302 INFO L129 PetriNetUnfolder]: 270/1910 cut-off events. [2021-10-13 22:47:42,302 INFO L130 PetriNetUnfolder]: For 175746/176060 co-relation queries the response was YES. [2021-10-13 22:47:42,326 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13660 conditions, 1910 events. 270/1910 cut-off events. For 175746/176060 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 15277 event pairs, 0 based on Foata normal form. 94/1799 useless extension candidates. Maximal degree in co-relation 13469. Up to 315 conditions per place. [2021-10-13 22:47:42,336 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 105 selfloop transitions, 216 changer transitions 8/373 dead transitions. [2021-10-13 22:47:42,336 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 373 transitions, 11448 flow [2021-10-13 22:47:42,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 22:47:42,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-10-13 22:47:42,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1777 transitions. [2021-10-13 22:47:42,338 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8413825757575758 [2021-10-13 22:47:42,338 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1777 transitions. [2021-10-13 22:47:42,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1777 transitions. [2021-10-13 22:47:42,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:42,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1777 transitions. [2021-10-13 22:47:42,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.53125) internal successors, (1777), 32 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:42,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 66.0) internal successors, (2178), 33 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:42,341 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 66.0) internal successors, (2178), 33 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:42,341 INFO L186 Difference]: Start difference. First operand has 403 places, 329 transitions, 8088 flow. Second operand 32 states and 1777 transitions. [2021-10-13 22:47:42,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 373 transitions, 11448 flow [2021-10-13 22:47:42,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 373 transitions, 10997 flow, removed 125 selfloop flow, removed 23 redundant places. [2021-10-13 22:47:42,804 INFO L242 Difference]: Finished difference. Result has 417 places, 345 transitions, 8996 flow [2021-10-13 22:47:42,804 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=7749, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=8996, PETRI_PLACES=417, PETRI_TRANSITIONS=345} [2021-10-13 22:47:42,805 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 351 predicate places. [2021-10-13 22:47:42,805 INFO L470 AbstractCegarLoop]: Abstraction has has 417 places, 345 transitions, 8996 flow [2021-10-13 22:47:42,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:42,805 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:42,805 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:47:42,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-10-13 22:47:43,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-10-13 22:47:43,019 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:43,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:43,020 INFO L82 PathProgramCache]: Analyzing trace with hash -260367776, now seen corresponding path program 38 times [2021-10-13 22:47:43,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:43,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111815048] [2021-10-13 22:47:43,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:43,020 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:43,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:43,164 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:43,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:43,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111815048] [2021-10-13 22:47:43,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111815048] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:43,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639588884] [2021-10-13 22:47:43,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:47:43,165 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:43,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:43,167 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 22:47:43,195 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 22:47:44,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:47:44,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:44,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 22:47:44,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:44,894 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:44,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639588884] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:44,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:44,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-10-13 22:47:44,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530257544] [2021-10-13 22:47:44,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 22:47:44,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:44,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 22:47:44,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-10-13 22:47:44,895 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:47:44,896 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 345 transitions, 8996 flow. Second operand has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:44,896 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:44,896 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:47:44,896 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:45,866 INFO L129 PetriNetUnfolder]: 282/1997 cut-off events. [2021-10-13 22:47:45,866 INFO L130 PetriNetUnfolder]: For 189666/190006 co-relation queries the response was YES. [2021-10-13 22:47:45,894 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14642 conditions, 1997 events. 282/1997 cut-off events. For 189666/190006 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 16276 event pairs, 0 based on Foata normal form. 106/1890 useless extension candidates. Maximal degree in co-relation 14445. Up to 335 conditions per place. [2021-10-13 22:47:45,906 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 95 selfloop transitions, 243 changer transitions 8/390 dead transitions. [2021-10-13 22:47:45,907 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 390 transitions, 12535 flow [2021-10-13 22:47:45,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-13 22:47:45,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-10-13 22:47:45,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1889 transitions. [2021-10-13 22:47:45,908 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8418003565062389 [2021-10-13 22:47:45,909 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1889 transitions. [2021-10-13 22:47:45,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1889 transitions. [2021-10-13 22:47:45,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:45,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1889 transitions. [2021-10-13 22:47:45,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 55.55882352941177) internal successors, (1889), 34 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:45,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 66.0) internal successors, (2310), 35 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:45,912 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 66.0) internal successors, (2310), 35 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:45,912 INFO L186 Difference]: Start difference. First operand has 417 places, 345 transitions, 8996 flow. Second operand 34 states and 1889 transitions. [2021-10-13 22:47:45,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 390 transitions, 12535 flow [2021-10-13 22:47:46,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 390 transitions, 11901 flow, removed 165 selfloop flow, removed 27 redundant places. [2021-10-13 22:47:46,343 INFO L242 Difference]: Finished difference. Result has 427 places, 359 transitions, 9646 flow [2021-10-13 22:47:46,343 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=8462, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=9646, PETRI_PLACES=427, PETRI_TRANSITIONS=359} [2021-10-13 22:47:46,343 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 361 predicate places. [2021-10-13 22:47:46,344 INFO L470 AbstractCegarLoop]: Abstraction has has 427 places, 359 transitions, 9646 flow [2021-10-13 22:47:46,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:46,344 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:46,344 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:47:46,370 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 22:47:46,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:46,559 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:46,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:46,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1202259034, now seen corresponding path program 39 times [2021-10-13 22:47:46,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:46,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725201303] [2021-10-13 22:47:46,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:46,560 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:46,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:46,706 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:46,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:46,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725201303] [2021-10-13 22:47:46,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725201303] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:46,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525473100] [2021-10-13 22:47:46,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:47:46,707 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:46,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:46,707 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 22:47:46,708 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 22:47:47,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-13 22:47:47,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:47,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 22:47:47,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:48,076 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:48,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525473100] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:48,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:48,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-10-13 22:47:48,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487944177] [2021-10-13 22:47:48,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 22:47:48,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:48,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 22:47:48,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-10-13 22:47:48,079 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:47:48,080 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 359 transitions, 9646 flow. Second operand has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:48,080 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:48,080 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:47:48,080 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:49,106 INFO L129 PetriNetUnfolder]: 290/2069 cut-off events. [2021-10-13 22:47:49,106 INFO L130 PetriNetUnfolder]: For 201424/201777 co-relation queries the response was YES. [2021-10-13 22:47:49,142 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15379 conditions, 2069 events. 290/2069 cut-off events. For 201424/201777 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 17099 event pairs, 0 based on Foata normal form. 117/1967 useless extension candidates. Maximal degree in co-relation 15178. Up to 347 conditions per place. [2021-10-13 22:47:49,157 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 85 selfloop transitions, 263 changer transitions 8/400 dead transitions. [2021-10-13 22:47:49,157 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 400 transitions, 13230 flow [2021-10-13 22:47:49,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-13 22:47:49,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-10-13 22:47:49,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1945 transitions. [2021-10-13 22:47:49,159 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.841991341991342 [2021-10-13 22:47:49,159 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1945 transitions. [2021-10-13 22:47:49,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1945 transitions. [2021-10-13 22:47:49,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:49,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1945 transitions. [2021-10-13 22:47:49,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 55.57142857142857) internal successors, (1945), 35 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:49,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 66.0) internal successors, (2376), 36 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:49,163 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 66.0) internal successors, (2376), 36 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:49,163 INFO L186 Difference]: Start difference. First operand has 427 places, 359 transitions, 9646 flow. Second operand 35 states and 1945 transitions. [2021-10-13 22:47:49,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 400 transitions, 13230 flow [2021-10-13 22:47:49,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 400 transitions, 12414 flow, removed 204 selfloop flow, removed 30 redundant places. [2021-10-13 22:47:49,609 INFO L242 Difference]: Finished difference. Result has 434 places, 368 transitions, 10061 flow [2021-10-13 22:47:49,609 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=8974, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=10061, PETRI_PLACES=434, PETRI_TRANSITIONS=368} [2021-10-13 22:47:49,609 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 368 predicate places. [2021-10-13 22:47:49,609 INFO L470 AbstractCegarLoop]: Abstraction has has 434 places, 368 transitions, 10061 flow [2021-10-13 22:47:49,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:49,610 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:49,610 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:47:49,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-10-13 22:47:49,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-10-13 22:47:49,811 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:49,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:49,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1517089366, now seen corresponding path program 40 times [2021-10-13 22:47:49,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:49,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110142189] [2021-10-13 22:47:49,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:49,811 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:49,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:49,963 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:49,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:49,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110142189] [2021-10-13 22:47:49,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110142189] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:49,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20125131] [2021-10-13 22:47:49,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:47:49,963 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:49,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:49,964 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 22:47:49,965 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 22:47:51,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:47:51,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:51,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 22:47:51,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:51,529 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:51,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20125131] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:51,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:51,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-10-13 22:47:51,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108494862] [2021-10-13 22:47:51,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 22:47:51,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:51,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 22:47:51,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-10-13 22:47:51,530 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:47:51,531 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 368 transitions, 10061 flow. Second operand has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:51,531 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:51,531 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:47:51,531 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:52,466 INFO L129 PetriNetUnfolder]: 309/2166 cut-off events. [2021-10-13 22:47:52,466 INFO L130 PetriNetUnfolder]: For 223425/223856 co-relation queries the response was YES. [2021-10-13 22:47:52,498 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16652 conditions, 2166 events. 309/2166 cut-off events. For 223425/223856 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 17913 event pairs, 0 based on Foata normal form. 125/2062 useless extension candidates. Maximal degree in co-relation 16448. Up to 369 conditions per place. [2021-10-13 22:47:52,512 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 85 selfloop transitions, 278 changer transitions 8/415 dead transitions. [2021-10-13 22:47:52,512 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 415 transitions, 14019 flow [2021-10-13 22:47:52,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-13 22:47:52,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-10-13 22:47:52,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2005 transitions. [2021-10-13 22:47:52,517 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8438552188552189 [2021-10-13 22:47:52,518 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2005 transitions. [2021-10-13 22:47:52,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2005 transitions. [2021-10-13 22:47:52,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:52,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2005 transitions. [2021-10-13 22:47:52,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 55.69444444444444) internal successors, (2005), 36 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:52,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:52,522 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:52,522 INFO L186 Difference]: Start difference. First operand has 434 places, 368 transitions, 10061 flow. Second operand 36 states and 2005 transitions. [2021-10-13 22:47:52,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 415 transitions, 14019 flow [2021-10-13 22:47:53,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 415 transitions, 13143 flow, removed 210 selfloop flow, removed 31 redundant places. [2021-10-13 22:47:53,038 INFO L242 Difference]: Finished difference. Result has 442 places, 379 transitions, 10604 flow [2021-10-13 22:47:53,038 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=9327, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=10604, PETRI_PLACES=442, PETRI_TRANSITIONS=379} [2021-10-13 22:47:53,038 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 376 predicate places. [2021-10-13 22:47:53,039 INFO L470 AbstractCegarLoop]: Abstraction has has 442 places, 379 transitions, 10604 flow [2021-10-13 22:47:53,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:53,039 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:53,039 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:47:53,058 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 22:47:53,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-10-13 22:47:53,239 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:53,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:53,240 INFO L82 PathProgramCache]: Analyzing trace with hash 880021058, now seen corresponding path program 41 times [2021-10-13 22:47:53,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:53,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576281693] [2021-10-13 22:47:53,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:53,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:53,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:53,417 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:53,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:53,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576281693] [2021-10-13 22:47:53,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576281693] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:53,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938290004] [2021-10-13 22:47:53,418 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:47:53,418 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:53,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:53,419 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 22:47:53,423 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 22:47:54,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-10-13 22:47:54,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:54,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 22:47:54,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:54,807 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:54,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938290004] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:54,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:54,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-10-13 22:47:54,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178720964] [2021-10-13 22:47:54,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 22:47:54,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:54,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 22:47:54,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-10-13 22:47:54,809 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:47:54,809 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 379 transitions, 10604 flow. Second operand has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:54,809 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:54,810 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:47:54,810 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:55,693 INFO L129 PetriNetUnfolder]: 304/2144 cut-off events. [2021-10-13 22:47:55,693 INFO L130 PetriNetUnfolder]: For 238314/238757 co-relation queries the response was YES. [2021-10-13 22:47:55,721 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16721 conditions, 2144 events. 304/2144 cut-off events. For 238314/238757 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 17786 event pairs, 0 based on Foata normal form. 136/2055 useless extension candidates. Maximal degree in co-relation 16513. Up to 361 conditions per place. [2021-10-13 22:47:55,732 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 80 selfloop transitions, 283 changer transitions 11/418 dead transitions. [2021-10-13 22:47:55,732 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 418 transitions, 14476 flow [2021-10-13 22:47:55,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-13 22:47:55,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-10-13 22:47:55,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2002 transitions. [2021-10-13 22:47:55,733 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8425925925925926 [2021-10-13 22:47:55,734 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2002 transitions. [2021-10-13 22:47:55,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2002 transitions. [2021-10-13 22:47:55,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:55,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2002 transitions. [2021-10-13 22:47:55,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 55.611111111111114) internal successors, (2002), 36 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:55,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:55,738 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:55,738 INFO L186 Difference]: Start difference. First operand has 442 places, 379 transitions, 10604 flow. Second operand 36 states and 2002 transitions. [2021-10-13 22:47:55,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 418 transitions, 14476 flow [2021-10-13 22:47:56,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 418 transitions, 13387 flow, removed 318 selfloop flow, removed 30 redundant places. [2021-10-13 22:47:56,440 INFO L242 Difference]: Finished difference. Result has 450 places, 382 transitions, 10682 flow [2021-10-13 22:47:56,440 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=9811, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=280, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=10682, PETRI_PLACES=450, PETRI_TRANSITIONS=382} [2021-10-13 22:47:56,440 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 384 predicate places. [2021-10-13 22:47:56,440 INFO L470 AbstractCegarLoop]: Abstraction has has 450 places, 382 transitions, 10682 flow [2021-10-13 22:47:56,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:56,440 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:47:56,440 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:47:56,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-10-13 22:47:56,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-10-13 22:47:56,641 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:47:56,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:47:56,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1454476032, now seen corresponding path program 42 times [2021-10-13 22:47:56,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:47:56,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535425151] [2021-10-13 22:47:56,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:47:56,641 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:47:56,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:47:56,831 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:56,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:47:56,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535425151] [2021-10-13 22:47:56,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535425151] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:56,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128493576] [2021-10-13 22:47:56,832 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:47:56,832 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:47:56,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:47:56,833 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:47:56,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-10-13 22:47:58,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-10-13 22:47:58,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:47:58,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 22:47:58,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:47:58,414 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:47:58,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128493576] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:47:58,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:47:58,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-10-13 22:47:58,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776727244] [2021-10-13 22:47:58,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 22:47:58,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:47:58,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 22:47:58,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-10-13 22:47:58,416 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:47:58,417 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 382 transitions, 10682 flow. Second operand has 19 states, 19 states have (on average 54.05263157894737) internal successors, (1027), 19 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:58,417 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:47:58,417 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:47:58,417 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:47:59,213 INFO L129 PetriNetUnfolder]: 312/2216 cut-off events. [2021-10-13 22:47:59,213 INFO L130 PetriNetUnfolder]: For 232950/233366 co-relation queries the response was YES. [2021-10-13 22:47:59,243 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17012 conditions, 2216 events. 312/2216 cut-off events. For 232950/233366 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 18662 event pairs, 0 based on Foata normal form. 50/2028 useless extension candidates. Maximal degree in co-relation 16801. Up to 470 conditions per place. [2021-10-13 22:47:59,257 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 312 selfloop transitions, 60 changer transitions 8/424 dead transitions. [2021-10-13 22:47:59,257 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 424 transitions, 14039 flow [2021-10-13 22:47:59,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 22:47:59,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-10-13 22:47:59,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1276 transitions. [2021-10-13 22:47:59,258 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8405797101449275 [2021-10-13 22:47:59,259 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1276 transitions. [2021-10-13 22:47:59,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1276 transitions. [2021-10-13 22:47:59,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:47:59,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1276 transitions. [2021-10-13 22:47:59,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 55.47826086956522) internal successors, (1276), 23 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:59,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 66.0) internal successors, (1584), 24 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:59,262 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 66.0) internal successors, (1584), 24 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:47:59,262 INFO L186 Difference]: Start difference. First operand has 450 places, 382 transitions, 10682 flow. Second operand 23 states and 1276 transitions. [2021-10-13 22:47:59,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 424 transitions, 14039 flow [2021-10-13 22:47:59,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 424 transitions, 13306 flow, removed 98 selfloop flow, removed 33 redundant places. [2021-10-13 22:48:00,008 INFO L242 Difference]: Finished difference. Result has 445 places, 392 transitions, 10641 flow [2021-10-13 22:48:00,008 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=9971, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=10641, PETRI_PLACES=445, PETRI_TRANSITIONS=392} [2021-10-13 22:48:00,008 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 379 predicate places. [2021-10-13 22:48:00,008 INFO L470 AbstractCegarLoop]: Abstraction has has 445 places, 392 transitions, 10641 flow [2021-10-13 22:48:00,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.05263157894737) internal successors, (1027), 19 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:00,009 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:00,009 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:48:00,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-10-13 22:48:00,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:00,217 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:00,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:00,218 INFO L82 PathProgramCache]: Analyzing trace with hash -143196714, now seen corresponding path program 43 times [2021-10-13 22:48:00,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:00,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393222730] [2021-10-13 22:48:00,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:00,218 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:00,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:00,482 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:00,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:00,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393222730] [2021-10-13 22:48:00,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393222730] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:00,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684269596] [2021-10-13 22:48:00,483 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:48:00,483 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:00,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:00,484 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 22:48:00,484 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 22:48:01,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:01,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 22:48:01,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:48:02,024 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:02,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684269596] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:02,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:48:02,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-10-13 22:48:02,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319013008] [2021-10-13 22:48:02,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 22:48:02,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:02,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 22:48:02,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-10-13 22:48:02,026 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:48:02,027 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 392 transitions, 10641 flow. Second operand has 19 states, 19 states have (on average 54.05263157894737) internal successors, (1027), 19 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:02,027 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:02,027 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:48:02,027 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:02,797 INFO L129 PetriNetUnfolder]: 318/2277 cut-off events. [2021-10-13 22:48:02,797 INFO L130 PetriNetUnfolder]: For 254325/254704 co-relation queries the response was YES. [2021-10-13 22:48:02,823 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17513 conditions, 2277 events. 318/2277 cut-off events. For 254325/254704 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 19237 event pairs, 0 based on Foata normal form. 62/2095 useless extension candidates. Maximal degree in co-relation 17297. Up to 379 conditions per place. [2021-10-13 22:48:02,834 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 254 selfloop transitions, 127 changer transitions 8/433 dead transitions. [2021-10-13 22:48:02,834 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 433 transitions, 14034 flow [2021-10-13 22:48:02,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 22:48:02,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-10-13 22:48:02,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1441 transitions. [2021-10-13 22:48:02,836 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8397435897435898 [2021-10-13 22:48:02,836 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1441 transitions. [2021-10-13 22:48:02,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1441 transitions. [2021-10-13 22:48:02,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:02,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1441 transitions. [2021-10-13 22:48:02,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 55.42307692307692) internal successors, (1441), 26 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:02,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 66.0) internal successors, (1782), 27 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:02,839 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 66.0) internal successors, (1782), 27 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:02,839 INFO L186 Difference]: Start difference. First operand has 445 places, 392 transitions, 10641 flow. Second operand 26 states and 1441 transitions. [2021-10-13 22:48:02,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 433 transitions, 14034 flow [2021-10-13 22:48:03,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 433 transitions, 13696 flow, removed 132 selfloop flow, removed 15 redundant places. [2021-10-13 22:48:03,430 INFO L242 Difference]: Finished difference. Result has 459 places, 398 transitions, 11077 flow [2021-10-13 22:48:03,430 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=10425, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=11077, PETRI_PLACES=459, PETRI_TRANSITIONS=398} [2021-10-13 22:48:03,430 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 393 predicate places. [2021-10-13 22:48:03,430 INFO L470 AbstractCegarLoop]: Abstraction has has 459 places, 398 transitions, 11077 flow [2021-10-13 22:48:03,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.05263157894737) internal successors, (1027), 19 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:03,431 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:03,431 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:48:03,450 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 22:48:03,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:03,631 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:03,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:03,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1680757086, now seen corresponding path program 44 times [2021-10-13 22:48:03,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:03,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179345734] [2021-10-13 22:48:03,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:03,632 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:03,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:03,858 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:03,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:03,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179345734] [2021-10-13 22:48:03,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179345734] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:03,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350912512] [2021-10-13 22:48:03,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:48:03,858 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:03,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:03,859 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 22:48:03,860 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 22:48:05,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:48:05,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:48:05,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 22:48:05,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:48:05,503 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:05,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350912512] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:05,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:48:05,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-10-13 22:48:05,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538675911] [2021-10-13 22:48:05,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 22:48:05,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:05,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 22:48:05,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-10-13 22:48:05,505 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:48:05,506 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 398 transitions, 11077 flow. Second operand has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:05,506 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:05,506 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:48:05,506 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:06,392 INFO L129 PetriNetUnfolder]: 336/2432 cut-off events. [2021-10-13 22:48:06,392 INFO L130 PetriNetUnfolder]: For 270624/271036 co-relation queries the response was YES. [2021-10-13 22:48:06,419 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18844 conditions, 2432 events. 336/2432 cut-off events. For 270624/271036 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 21148 event pairs, 0 based on Foata normal form. 79/2250 useless extension candidates. Maximal degree in co-relation 18624. Up to 409 conditions per place. [2021-10-13 22:48:06,431 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 224 selfloop transitions, 177 changer transitions 8/453 dead transitions. [2021-10-13 22:48:06,431 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 453 transitions, 15158 flow [2021-10-13 22:48:06,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 22:48:06,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-10-13 22:48:06,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1608 transitions. [2021-10-13 22:48:06,433 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8401253918495298 [2021-10-13 22:48:06,433 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1608 transitions. [2021-10-13 22:48:06,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1608 transitions. [2021-10-13 22:48:06,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:06,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1608 transitions. [2021-10-13 22:48:06,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 55.44827586206897) internal successors, (1608), 29 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:06,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:06,435 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:06,435 INFO L186 Difference]: Start difference. First operand has 459 places, 398 transitions, 11077 flow. Second operand 29 states and 1608 transitions. [2021-10-13 22:48:06,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 453 transitions, 15158 flow [2021-10-13 22:48:07,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 453 transitions, 14773 flow, removed 123 selfloop flow, removed 18 redundant places. [2021-10-13 22:48:07,067 INFO L242 Difference]: Finished difference. Result has 478 places, 418 transitions, 12267 flow [2021-10-13 22:48:07,068 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=10804, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=12267, PETRI_PLACES=478, PETRI_TRANSITIONS=418} [2021-10-13 22:48:07,068 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 412 predicate places. [2021-10-13 22:48:07,068 INFO L470 AbstractCegarLoop]: Abstraction has has 478 places, 418 transitions, 12267 flow [2021-10-13 22:48:07,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:07,068 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:07,069 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:48:07,088 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 22:48:07,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:07,269 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:07,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:07,270 INFO L82 PathProgramCache]: Analyzing trace with hash 351711076, now seen corresponding path program 45 times [2021-10-13 22:48:07,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:07,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530814365] [2021-10-13 22:48:07,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:07,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:07,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:07,453 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:07,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:07,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530814365] [2021-10-13 22:48:07,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530814365] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:07,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735541597] [2021-10-13 22:48:07,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:48:07,453 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:07,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:07,454 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 22:48:07,455 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 22:48:08,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-10-13 22:48:08,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:48:08,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 22:48:08,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:48:09,072 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:09,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735541597] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:09,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:48:09,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-10-13 22:48:09,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614381912] [2021-10-13 22:48:09,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 22:48:09,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:09,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 22:48:09,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-10-13 22:48:09,074 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:48:09,075 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 418 transitions, 12267 flow. Second operand has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:09,075 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:09,075 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:48:09,075 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:10,200 INFO L129 PetriNetUnfolder]: 348/2540 cut-off events. [2021-10-13 22:48:10,200 INFO L130 PetriNetUnfolder]: For 284251/284669 co-relation queries the response was YES. [2021-10-13 22:48:10,248 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19898 conditions, 2540 events. 348/2540 cut-off events. For 284251/284669 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 22526 event pairs, 0 based on Foata normal form. 109/2378 useless extension candidates. Maximal degree in co-relation 19669. Up to 429 conditions per place. [2021-10-13 22:48:10,265 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 147 selfloop transitions, 270 changer transitions 8/469 dead transitions. [2021-10-13 22:48:10,265 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 469 transitions, 16455 flow [2021-10-13 22:48:10,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-13 22:48:10,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-13 22:48:10,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1721 transitions. [2021-10-13 22:48:10,267 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8411534701857283 [2021-10-13 22:48:10,267 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1721 transitions. [2021-10-13 22:48:10,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1721 transitions. [2021-10-13 22:48:10,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:10,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1721 transitions. [2021-10-13 22:48:10,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 55.516129032258064) internal successors, (1721), 31 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:10,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 66.0) internal successors, (2112), 32 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:10,270 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 66.0) internal successors, (2112), 32 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:10,270 INFO L186 Difference]: Start difference. First operand has 478 places, 418 transitions, 12267 flow. Second operand 31 states and 1721 transitions. [2021-10-13 22:48:10,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 469 transitions, 16455 flow [2021-10-13 22:48:11,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 469 transitions, 16028 flow, removed 143 selfloop flow, removed 17 redundant places. [2021-10-13 22:48:11,150 INFO L242 Difference]: Finished difference. Result has 496 places, 431 transitions, 13278 flow [2021-10-13 22:48:11,150 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=11968, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=13278, PETRI_PLACES=496, PETRI_TRANSITIONS=431} [2021-10-13 22:48:11,150 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 430 predicate places. [2021-10-13 22:48:11,150 INFO L470 AbstractCegarLoop]: Abstraction has has 496 places, 431 transitions, 13278 flow [2021-10-13 22:48:11,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:11,151 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:11,151 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:48:11,171 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 22:48:11,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-10-13 22:48:11,351 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:11,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:11,352 INFO L82 PathProgramCache]: Analyzing trace with hash -405059346, now seen corresponding path program 46 times [2021-10-13 22:48:11,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:11,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258048211] [2021-10-13 22:48:11,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:11,352 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:11,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:11,518 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:11,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:11,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258048211] [2021-10-13 22:48:11,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258048211] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:11,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841820075] [2021-10-13 22:48:11,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:48:11,519 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:11,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:11,520 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 22:48:11,521 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 22:48:12,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:48:12,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:48:12,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 22:48:12,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:48:13,153 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:13,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841820075] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:13,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:48:13,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-10-13 22:48:13,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98441818] [2021-10-13 22:48:13,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 22:48:13,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:13,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 22:48:13,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-10-13 22:48:13,154 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:48:13,155 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 431 transitions, 13278 flow. Second operand has 19 states, 19 states have (on average 54.05263157894737) internal successors, (1027), 19 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:13,155 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:13,155 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:48:13,155 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:14,226 INFO L129 PetriNetUnfolder]: 354/2580 cut-off events. [2021-10-13 22:48:14,226 INFO L130 PetriNetUnfolder]: For 291971/292393 co-relation queries the response was YES. [2021-10-13 22:48:14,258 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20552 conditions, 2580 events. 354/2580 cut-off events. For 291971/292393 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 22891 event pairs, 0 based on Foata normal form. 134/2441 useless extension candidates. Maximal degree in co-relation 20318. Up to 439 conditions per place. [2021-10-13 22:48:14,271 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 99 selfloop transitions, 328 changer transitions 8/479 dead transitions. [2021-10-13 22:48:14,271 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 479 transitions, 17570 flow [2021-10-13 22:48:14,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-13 22:48:14,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-10-13 22:48:14,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1889 transitions. [2021-10-13 22:48:14,272 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8418003565062389 [2021-10-13 22:48:14,272 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1889 transitions. [2021-10-13 22:48:14,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1889 transitions. [2021-10-13 22:48:14,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:14,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1889 transitions. [2021-10-13 22:48:14,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 55.55882352941177) internal successors, (1889), 34 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:14,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 66.0) internal successors, (2310), 35 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:14,275 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 66.0) internal successors, (2310), 35 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:14,275 INFO L186 Difference]: Start difference. First operand has 496 places, 431 transitions, 13278 flow. Second operand 34 states and 1889 transitions. [2021-10-13 22:48:14,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 479 transitions, 17570 flow [2021-10-13 22:48:15,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 479 transitions, 16935 flow, removed 144 selfloop flow, removed 25 redundant places. [2021-10-13 22:48:15,162 INFO L242 Difference]: Finished difference. Result has 508 places, 440 transitions, 14003 flow [2021-10-13 22:48:15,163 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=12787, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=319, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=14003, PETRI_PLACES=508, PETRI_TRANSITIONS=440} [2021-10-13 22:48:15,163 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 442 predicate places. [2021-10-13 22:48:15,163 INFO L470 AbstractCegarLoop]: Abstraction has has 508 places, 440 transitions, 14003 flow [2021-10-13 22:48:15,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.05263157894737) internal successors, (1027), 19 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:15,164 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:15,164 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:48:15,190 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 22:48:15,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-10-13 22:48:15,379 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:15,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:15,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1941918844, now seen corresponding path program 47 times [2021-10-13 22:48:15,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:15,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061575653] [2021-10-13 22:48:15,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:15,380 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:15,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:15,517 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:15,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:15,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061575653] [2021-10-13 22:48:15,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061575653] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:15,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448455485] [2021-10-13 22:48:15,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:48:15,517 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:15,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:15,518 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:48:15,519 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 22:48:16,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-10-13 22:48:16,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:48:16,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 22:48:16,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:48:17,156 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:17,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448455485] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:17,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:48:17,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-10-13 22:48:17,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498258391] [2021-10-13 22:48:17,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 22:48:17,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:17,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 22:48:17,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-10-13 22:48:17,157 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:48:17,158 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 440 transitions, 14003 flow. Second operand has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:17,158 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:17,158 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:48:17,158 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:18,482 INFO L129 PetriNetUnfolder]: 360/2611 cut-off events. [2021-10-13 22:48:18,482 INFO L130 PetriNetUnfolder]: For 303406/303849 co-relation queries the response was YES. [2021-10-13 22:48:18,526 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21229 conditions, 2611 events. 360/2611 cut-off events. For 303406/303849 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 23193 event pairs, 0 based on Foata normal form. 159/2495 useless extension candidates. Maximal degree in co-relation 20991. Up to 447 conditions per place. [2021-10-13 22:48:18,549 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 85 selfloop transitions, 351 changer transitions 8/488 dead transitions. [2021-10-13 22:48:18,549 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 488 transitions, 18646 flow [2021-10-13 22:48:18,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-13 22:48:18,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-10-13 22:48:18,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2113 transitions. [2021-10-13 22:48:18,552 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8425039872408293 [2021-10-13 22:48:18,552 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2113 transitions. [2021-10-13 22:48:18,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2113 transitions. [2021-10-13 22:48:18,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:18,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2113 transitions. [2021-10-13 22:48:18,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 55.60526315789474) internal successors, (2113), 38 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:18,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 66.0) internal successors, (2574), 39 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:18,556 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 66.0) internal successors, (2574), 39 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:18,556 INFO L186 Difference]: Start difference. First operand has 508 places, 440 transitions, 14003 flow. Second operand 38 states and 2113 transitions. [2021-10-13 22:48:18,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 488 transitions, 18646 flow [2021-10-13 22:48:19,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 488 transitions, 17828 flow, removed 179 selfloop flow, removed 27 redundant places. [2021-10-13 22:48:19,473 INFO L242 Difference]: Finished difference. Result has 522 places, 446 transitions, 14555 flow [2021-10-13 22:48:19,473 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=13303, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=346, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=14555, PETRI_PLACES=522, PETRI_TRANSITIONS=446} [2021-10-13 22:48:19,473 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 456 predicate places. [2021-10-13 22:48:19,474 INFO L470 AbstractCegarLoop]: Abstraction has has 522 places, 446 transitions, 14555 flow [2021-10-13 22:48:19,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:19,474 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:19,474 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:48:19,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-10-13 22:48:19,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-10-13 22:48:19,674 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:19,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:19,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1744493251, now seen corresponding path program 48 times [2021-10-13 22:48:19,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:19,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955901672] [2021-10-13 22:48:19,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:19,675 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:19,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:19,917 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:19,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:19,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955901672] [2021-10-13 22:48:19,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955901672] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:19,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157477311] [2021-10-13 22:48:19,918 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:48:19,918 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:19,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:19,920 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 22:48:19,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-10-13 22:48:21,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-10-13 22:48:21,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:48:21,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 22:48:21,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:48:21,759 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:21,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157477311] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:21,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:48:21,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-10-13 22:48:21,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757854189] [2021-10-13 22:48:21,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:48:21,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:21,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:48:21,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:48:21,761 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:48:21,761 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 446 transitions, 14555 flow. Second operand has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:21,761 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:21,761 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:48:21,761 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:22,754 INFO L129 PetriNetUnfolder]: 362/2636 cut-off events. [2021-10-13 22:48:22,754 INFO L130 PetriNetUnfolder]: For 319310/319762 co-relation queries the response was YES. [2021-10-13 22:48:22,784 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21795 conditions, 2636 events. 362/2636 cut-off events. For 319310/319762 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 23341 event pairs, 0 based on Foata normal form. 63/2415 useless extension candidates. Maximal degree in co-relation 21553. Up to 625 conditions per place. [2021-10-13 22:48:22,798 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 393 selfloop transitions, 29 changer transitions 8/474 dead transitions. [2021-10-13 22:48:22,798 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 474 transitions, 17633 flow [2021-10-13 22:48:22,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 22:48:22,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-10-13 22:48:22,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1275 transitions. [2021-10-13 22:48:22,799 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8399209486166008 [2021-10-13 22:48:22,800 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1275 transitions. [2021-10-13 22:48:22,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1275 transitions. [2021-10-13 22:48:22,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:22,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1275 transitions. [2021-10-13 22:48:22,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 55.43478260869565) internal successors, (1275), 23 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:22,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 66.0) internal successors, (1584), 24 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:22,802 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 66.0) internal successors, (1584), 24 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:22,802 INFO L186 Difference]: Start difference. First operand has 522 places, 446 transitions, 14555 flow. Second operand 23 states and 1275 transitions. [2021-10-13 22:48:22,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 474 transitions, 17633 flow [2021-10-13 22:48:23,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 474 transitions, 16665 flow, removed 175 selfloop flow, removed 33 redundant places. [2021-10-13 22:48:23,652 INFO L242 Difference]: Finished difference. Result has 513 places, 448 transitions, 13917 flow [2021-10-13 22:48:23,653 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=13647, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=13917, PETRI_PLACES=513, PETRI_TRANSITIONS=448} [2021-10-13 22:48:23,653 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 447 predicate places. [2021-10-13 22:48:23,653 INFO L470 AbstractCegarLoop]: Abstraction has has 513 places, 448 transitions, 13917 flow [2021-10-13 22:48:23,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:23,653 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:23,653 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:48:23,674 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 22:48:23,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-10-13 22:48:23,854 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:23,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:23,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1737358403, now seen corresponding path program 49 times [2021-10-13 22:48:23,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:23,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753504216] [2021-10-13 22:48:23,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:23,854 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:23,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:24,094 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:24,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:24,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753504216] [2021-10-13 22:48:24,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753504216] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:24,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483871138] [2021-10-13 22:48:24,094 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:48:24,094 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:24,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:24,101 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:48:24,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-10-13 22:48:25,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:25,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 22:48:25,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:48:26,032 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:26,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483871138] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:26,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:48:26,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-10-13 22:48:26,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330301007] [2021-10-13 22:48:26,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 22:48:26,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:26,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 22:48:26,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-10-13 22:48:26,034 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:48:26,034 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 448 transitions, 13917 flow. Second operand has 22 states, 22 states have (on average 54.13636363636363) internal successors, (1191), 22 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:26,035 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:26,035 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:48:26,035 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:26,986 INFO L129 PetriNetUnfolder]: 364/2654 cut-off events. [2021-10-13 22:48:26,986 INFO L130 PetriNetUnfolder]: For 328071/328519 co-relation queries the response was YES. [2021-10-13 22:48:27,023 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21753 conditions, 2654 events. 364/2654 cut-off events. For 328071/328519 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 23570 event pairs, 0 based on Foata normal form. 65/2433 useless extension candidates. Maximal degree in co-relation 21510. Up to 585 conditions per place. [2021-10-13 22:48:27,036 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 372 selfloop transitions, 53 changer transitions 8/477 dead transitions. [2021-10-13 22:48:27,036 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 477 transitions, 17135 flow [2021-10-13 22:48:27,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 22:48:27,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-10-13 22:48:27,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1442 transitions. [2021-10-13 22:48:27,038 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8403263403263403 [2021-10-13 22:48:27,038 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1442 transitions. [2021-10-13 22:48:27,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1442 transitions. [2021-10-13 22:48:27,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:27,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1442 transitions. [2021-10-13 22:48:27,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 55.46153846153846) internal successors, (1442), 26 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:27,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 66.0) internal successors, (1782), 27 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:27,040 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 66.0) internal successors, (1782), 27 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:27,040 INFO L186 Difference]: Start difference. First operand has 513 places, 448 transitions, 13917 flow. Second operand 26 states and 1442 transitions. [2021-10-13 22:48:27,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 477 transitions, 17135 flow [2021-10-13 22:48:27,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 477 transitions, 16845 flow, removed 118 selfloop flow, removed 20 redundant places. [2021-10-13 22:48:27,922 INFO L242 Difference]: Finished difference. Result has 520 places, 450 transitions, 14041 flow [2021-10-13 22:48:27,922 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=13719, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=14041, PETRI_PLACES=520, PETRI_TRANSITIONS=450} [2021-10-13 22:48:27,922 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 454 predicate places. [2021-10-13 22:48:27,922 INFO L470 AbstractCegarLoop]: Abstraction has has 520 places, 450 transitions, 14041 flow [2021-10-13 22:48:27,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.13636363636363) internal successors, (1191), 22 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:27,922 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:27,923 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:48:27,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-10-13 22:48:28,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-10-13 22:48:28,123 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:28,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:28,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1540831153, now seen corresponding path program 50 times [2021-10-13 22:48:28,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:28,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257191105] [2021-10-13 22:48:28,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:28,124 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:28,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:28,329 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:28,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:28,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257191105] [2021-10-13 22:48:28,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257191105] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:28,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451266866] [2021-10-13 22:48:28,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:48:28,329 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:28,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:28,332 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:48:28,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-10-13 22:48:29,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:48:29,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:48:29,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 22:48:29,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:48:30,214 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:30,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451266866] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:30,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:48:30,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-10-13 22:48:30,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499505266] [2021-10-13 22:48:30,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:48:30,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:30,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:48:30,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:48:30,216 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:48:30,217 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 450 transitions, 14041 flow. Second operand has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:30,217 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:30,217 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:48:30,217 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:31,446 INFO L129 PetriNetUnfolder]: 366/2672 cut-off events. [2021-10-13 22:48:31,446 INFO L130 PetriNetUnfolder]: For 331160/331608 co-relation queries the response was YES. [2021-10-13 22:48:31,476 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21934 conditions, 2672 events. 366/2672 cut-off events. For 331160/331608 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 23692 event pairs, 0 based on Foata normal form. 68/2452 useless extension candidates. Maximal degree in co-relation 21689. Up to 549 conditions per place. [2021-10-13 22:48:31,490 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 352 selfloop transitions, 74 changer transitions 8/478 dead transitions. [2021-10-13 22:48:31,490 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 478 transitions, 17255 flow [2021-10-13 22:48:31,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-13 22:48:31,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-10-13 22:48:31,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1498 transitions. [2021-10-13 22:48:31,492 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8406285072951739 [2021-10-13 22:48:31,492 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1498 transitions. [2021-10-13 22:48:31,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1498 transitions. [2021-10-13 22:48:31,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:31,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1498 transitions. [2021-10-13 22:48:31,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 55.48148148148148) internal successors, (1498), 27 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:31,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 66.0) internal successors, (1848), 28 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:31,495 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 66.0) internal successors, (1848), 28 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:31,495 INFO L186 Difference]: Start difference. First operand has 520 places, 450 transitions, 14041 flow. Second operand 27 states and 1498 transitions. [2021-10-13 22:48:31,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 478 transitions, 17255 flow [2021-10-13 22:48:32,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 478 transitions, 16925 flow, removed 116 selfloop flow, removed 23 redundant places. [2021-10-13 22:48:32,507 INFO L242 Difference]: Finished difference. Result has 525 places, 452 transitions, 14171 flow [2021-10-13 22:48:32,508 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=13803, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=14171, PETRI_PLACES=525, PETRI_TRANSITIONS=452} [2021-10-13 22:48:32,508 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 459 predicate places. [2021-10-13 22:48:32,508 INFO L470 AbstractCegarLoop]: Abstraction has has 525 places, 452 transitions, 14171 flow [2021-10-13 22:48:32,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:32,509 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:32,509 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:48:32,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-10-13 22:48:32,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-10-13 22:48:32,716 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:32,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:32,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1875882237, now seen corresponding path program 51 times [2021-10-13 22:48:32,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:32,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288049304] [2021-10-13 22:48:32,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:32,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:32,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:32,896 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:32,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:32,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288049304] [2021-10-13 22:48:32,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288049304] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:32,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838300609] [2021-10-13 22:48:32,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:48:32,897 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:32,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:32,898 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:48:32,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-10-13 22:48:34,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-13 22:48:34,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:48:34,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 22:48:34,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:48:34,833 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:34,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838300609] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:34,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:48:34,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-10-13 22:48:34,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494690721] [2021-10-13 22:48:34,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:48:34,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:34,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:48:34,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:48:34,835 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:48:34,836 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 452 transitions, 14171 flow. Second operand has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:34,836 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:34,836 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:48:34,836 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:35,980 INFO L129 PetriNetUnfolder]: 374/2751 cut-off events. [2021-10-13 22:48:35,980 INFO L130 PetriNetUnfolder]: For 340748/341156 co-relation queries the response was YES. [2021-10-13 22:48:36,030 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22604 conditions, 2751 events. 374/2751 cut-off events. For 340748/341156 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 24626 event pairs, 0 based on Foata normal form. 82/2536 useless extension candidates. Maximal degree in co-relation 22357. Up to 471 conditions per place. [2021-10-13 22:48:36,050 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 288 selfloop transitions, 148 changer transitions 8/488 dead transitions. [2021-10-13 22:48:36,050 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 488 transitions, 17856 flow [2021-10-13 22:48:36,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 22:48:36,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-10-13 22:48:36,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1663 transitions. [2021-10-13 22:48:36,052 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8398989898989899 [2021-10-13 22:48:36,052 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1663 transitions. [2021-10-13 22:48:36,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1663 transitions. [2021-10-13 22:48:36,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:36,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1663 transitions. [2021-10-13 22:48:36,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 55.43333333333333) internal successors, (1663), 30 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:36,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:36,054 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:36,054 INFO L186 Difference]: Start difference. First operand has 525 places, 452 transitions, 14171 flow. Second operand 30 states and 1663 transitions. [2021-10-13 22:48:36,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 488 transitions, 17856 flow [2021-10-13 22:48:37,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 488 transitions, 17484 flow, removed 118 selfloop flow, removed 24 redundant places. [2021-10-13 22:48:37,146 INFO L242 Difference]: Finished difference. Result has 536 places, 460 transitions, 14848 flow [2021-10-13 22:48:37,146 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=13895, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=14848, PETRI_PLACES=536, PETRI_TRANSITIONS=460} [2021-10-13 22:48:37,146 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 470 predicate places. [2021-10-13 22:48:37,146 INFO L470 AbstractCegarLoop]: Abstraction has has 536 places, 460 transitions, 14848 flow [2021-10-13 22:48:37,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:37,147 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:37,147 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:48:37,168 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 22:48:37,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:37,347 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:37,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:37,348 INFO L82 PathProgramCache]: Analyzing trace with hash -143169005, now seen corresponding path program 52 times [2021-10-13 22:48:37,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:37,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953377765] [2021-10-13 22:48:37,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:37,348 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:37,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:37,563 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:37,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:37,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953377765] [2021-10-13 22:48:37,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953377765] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:37,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714958684] [2021-10-13 22:48:37,564 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:48:37,564 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:37,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:37,565 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 22:48:37,566 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 22:48:39,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:48:39,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:48:39,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 22:48:39,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:48:39,461 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:39,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714958684] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:39,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:48:39,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-10-13 22:48:39,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176211754] [2021-10-13 22:48:39,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:48:39,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:39,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:48:39,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:48:39,463 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:48:39,463 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 460 transitions, 14848 flow. Second operand has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:39,463 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:39,463 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:48:39,463 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:40,558 INFO L129 PetriNetUnfolder]: 380/2805 cut-off events. [2021-10-13 22:48:40,559 INFO L130 PetriNetUnfolder]: For 348528/348936 co-relation queries the response was YES. [2021-10-13 22:48:40,717 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23167 conditions, 2805 events. 380/2805 cut-off events. For 348528/348936 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 25278 event pairs, 0 based on Foata normal form. 119/2623 useless extension candidates. Maximal degree in co-relation 22913. Up to 481 conditions per place. [2021-10-13 22:48:40,732 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 175 selfloop transitions, 270 changer transitions 8/497 dead transitions. [2021-10-13 22:48:40,732 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 566 places, 497 transitions, 18674 flow [2021-10-13 22:48:40,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-13 22:48:40,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-10-13 22:48:40,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1887 transitions. [2021-10-13 22:48:40,734 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8409090909090909 [2021-10-13 22:48:40,734 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1887 transitions. [2021-10-13 22:48:40,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1887 transitions. [2021-10-13 22:48:40,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:40,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1887 transitions. [2021-10-13 22:48:40,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 55.5) internal successors, (1887), 34 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:40,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 66.0) internal successors, (2310), 35 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:40,737 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 66.0) internal successors, (2310), 35 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:40,737 INFO L186 Difference]: Start difference. First operand has 536 places, 460 transitions, 14848 flow. Second operand 34 states and 1887 transitions. [2021-10-13 22:48:40,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 566 places, 497 transitions, 18674 flow [2021-10-13 22:48:41,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 543 places, 497 transitions, 18228 flow, removed 126 selfloop flow, removed 23 redundant places. [2021-10-13 22:48:41,920 INFO L242 Difference]: Finished difference. Result has 548 places, 466 transitions, 15478 flow [2021-10-13 22:48:41,920 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=14510, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=15478, PETRI_PLACES=548, PETRI_TRANSITIONS=466} [2021-10-13 22:48:41,920 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 482 predicate places. [2021-10-13 22:48:41,920 INFO L470 AbstractCegarLoop]: Abstraction has has 548 places, 466 transitions, 15478 flow [2021-10-13 22:48:41,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:41,921 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:41,921 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:48:41,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-10-13 22:48:42,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:42,121 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:42,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:42,122 INFO L82 PathProgramCache]: Analyzing trace with hash 803529633, now seen corresponding path program 53 times [2021-10-13 22:48:42,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:42,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158779212] [2021-10-13 22:48:42,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:42,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:42,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:42,297 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:42,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:42,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158779212] [2021-10-13 22:48:42,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158779212] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:42,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268455067] [2021-10-13 22:48:42,297 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:48:42,297 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:42,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:42,298 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 22:48:42,299 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 22:48:43,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-10-13 22:48:43,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:48:43,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 22:48:43,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:48:44,357 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:44,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268455067] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:44,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:48:44,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-10-13 22:48:44,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198551250] [2021-10-13 22:48:44,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 22:48:44,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:44,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 22:48:44,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-10-13 22:48:44,359 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:48:44,360 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 466 transitions, 15478 flow. Second operand has 22 states, 22 states have (on average 54.13636363636363) internal successors, (1191), 22 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:44,360 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:44,360 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:48:44,360 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:45,681 INFO L129 PetriNetUnfolder]: 382/2823 cut-off events. [2021-10-13 22:48:45,681 INFO L130 PetriNetUnfolder]: For 351302/351738 co-relation queries the response was YES. [2021-10-13 22:48:45,721 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23524 conditions, 2823 events. 382/2823 cut-off events. For 351302/351738 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 25410 event pairs, 0 based on Foata normal form. 143/2665 useless extension candidates. Maximal degree in co-relation 23268. Up to 485 conditions per place. [2021-10-13 22:48:45,737 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 127 selfloop transitions, 324 changer transitions 8/503 dead transitions. [2021-10-13 22:48:45,737 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 581 places, 503 transitions, 19468 flow [2021-10-13 22:48:45,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-13 22:48:45,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-10-13 22:48:45,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2055 transitions. [2021-10-13 22:48:45,739 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8415233415233415 [2021-10-13 22:48:45,739 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2055 transitions. [2021-10-13 22:48:45,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2055 transitions. [2021-10-13 22:48:45,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:45,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2055 transitions. [2021-10-13 22:48:45,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 55.54054054054054) internal successors, (2055), 37 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:45,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 66.0) internal successors, (2508), 38 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:45,742 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 66.0) internal successors, (2508), 38 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:45,742 INFO L186 Difference]: Start difference. First operand has 548 places, 466 transitions, 15478 flow. Second operand 37 states and 2055 transitions. [2021-10-13 22:48:45,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 581 places, 503 transitions, 19468 flow [2021-10-13 22:48:46,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 550 places, 503 transitions, 18703 flow, removed 140 selfloop flow, removed 31 redundant places. [2021-10-13 22:48:47,004 INFO L242 Difference]: Finished difference. Result has 555 places, 468 transitions, 15759 flow [2021-10-13 22:48:47,005 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=14833, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=15759, PETRI_PLACES=555, PETRI_TRANSITIONS=468} [2021-10-13 22:48:47,005 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 489 predicate places. [2021-10-13 22:48:47,005 INFO L470 AbstractCegarLoop]: Abstraction has has 555 places, 468 transitions, 15759 flow [2021-10-13 22:48:47,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.13636363636363) internal successors, (1191), 22 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:47,005 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:47,005 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:48:47,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-10-13 22:48:47,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:47,216 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:47,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:47,216 INFO L82 PathProgramCache]: Analyzing trace with hash -240295595, now seen corresponding path program 54 times [2021-10-13 22:48:47,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:47,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55571936] [2021-10-13 22:48:47,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:47,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:47,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:47,391 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:47,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:47,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55571936] [2021-10-13 22:48:47,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55571936] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:47,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277284059] [2021-10-13 22:48:47,392 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:48:47,392 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:47,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:47,393 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 22:48:47,393 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 22:48:49,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-10-13 22:48:49,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:48:49,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 22:48:49,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:48:49,328 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:49,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277284059] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:49,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:48:49,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-10-13 22:48:49,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117318701] [2021-10-13 22:48:49,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:48:49,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:49,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:48:49,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:48:49,330 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:48:49,331 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 555 places, 468 transitions, 15759 flow. Second operand has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:49,331 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:49,331 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:48:49,331 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:50,618 INFO L129 PetriNetUnfolder]: 388/2870 cut-off events. [2021-10-13 22:48:50,619 INFO L130 PetriNetUnfolder]: For 358250/358698 co-relation queries the response was YES. [2021-10-13 22:48:50,654 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24039 conditions, 2870 events. 388/2870 cut-off events. For 358250/358698 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 26015 event pairs, 0 based on Foata normal form. 152/2716 useless extension candidates. Maximal degree in co-relation 23781. Up to 495 conditions per place. [2021-10-13 22:48:50,670 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 113 selfloop transitions, 344 changer transitions 8/509 dead transitions. [2021-10-13 22:48:50,670 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 589 places, 509 transitions, 19985 flow [2021-10-13 22:48:50,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-13 22:48:50,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-10-13 22:48:50,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2111 transitions. [2021-10-13 22:48:50,672 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8417065390749602 [2021-10-13 22:48:50,672 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2111 transitions. [2021-10-13 22:48:50,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2111 transitions. [2021-10-13 22:48:50,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:50,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2111 transitions. [2021-10-13 22:48:50,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 55.55263157894737) internal successors, (2111), 38 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:50,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 66.0) internal successors, (2574), 39 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:50,675 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 66.0) internal successors, (2574), 39 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:50,675 INFO L186 Difference]: Start difference. First operand has 555 places, 468 transitions, 15759 flow. Second operand 38 states and 2111 transitions. [2021-10-13 22:48:50,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 589 places, 509 transitions, 19985 flow [2021-10-13 22:48:51,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 509 transitions, 19183 flow, removed 134 selfloop flow, removed 33 redundant places. [2021-10-13 22:48:51,997 INFO L242 Difference]: Finished difference. Result has 561 places, 474 transitions, 16208 flow [2021-10-13 22:48:51,998 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=15081, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=338, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=16208, PETRI_PLACES=561, PETRI_TRANSITIONS=474} [2021-10-13 22:48:51,998 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 495 predicate places. [2021-10-13 22:48:51,998 INFO L470 AbstractCegarLoop]: Abstraction has has 561 places, 474 transitions, 16208 flow [2021-10-13 22:48:51,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:51,998 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:51,998 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:48:52,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-10-13 22:48:52,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-10-13 22:48:52,199 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:52,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:52,200 INFO L82 PathProgramCache]: Analyzing trace with hash 2130756851, now seen corresponding path program 55 times [2021-10-13 22:48:52,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:52,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16690746] [2021-10-13 22:48:52,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:52,200 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:52,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:52,374 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:52,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:52,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16690746] [2021-10-13 22:48:52,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16690746] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:52,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160122299] [2021-10-13 22:48:52,375 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:48:52,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:52,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:52,375 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 22:48:52,376 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 22:48:54,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:54,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 22:48:54,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:48:54,431 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:54,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160122299] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:54,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:48:54,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-10-13 22:48:54,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559258045] [2021-10-13 22:48:54,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 22:48:54,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:54,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 22:48:54,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-10-13 22:48:54,433 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:48:54,433 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 474 transitions, 16208 flow. Second operand has 22 states, 22 states have (on average 54.13636363636363) internal successors, (1191), 22 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:54,433 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:54,433 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:48:54,433 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:48:55,756 INFO L129 PetriNetUnfolder]: 396/2935 cut-off events. [2021-10-13 22:48:55,756 INFO L130 PetriNetUnfolder]: For 368853/369319 co-relation queries the response was YES. [2021-10-13 22:48:55,795 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24737 conditions, 2935 events. 396/2935 cut-off events. For 368853/369319 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 26858 event pairs, 0 based on Foata normal form. 152/2775 useless extension candidates. Maximal degree in co-relation 24477. Up to 509 conditions per place. [2021-10-13 22:48:55,810 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 109 selfloop transitions, 358 changer transitions 8/519 dead transitions. [2021-10-13 22:48:55,811 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 596 places, 519 transitions, 20751 flow [2021-10-13 22:48:55,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-13 22:48:55,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-10-13 22:48:55,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2167 transitions. [2021-10-13 22:48:55,813 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8418803418803419 [2021-10-13 22:48:55,813 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2167 transitions. [2021-10-13 22:48:55,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2167 transitions. [2021-10-13 22:48:55,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:48:55,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2167 transitions. [2021-10-13 22:48:55,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 55.56410256410256) internal successors, (2167), 39 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:55,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 66.0) internal successors, (2640), 40 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:55,817 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 66.0) internal successors, (2640), 40 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:55,817 INFO L186 Difference]: Start difference. First operand has 561 places, 474 transitions, 16208 flow. Second operand 39 states and 2167 transitions. [2021-10-13 22:48:55,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 596 places, 519 transitions, 20751 flow [2021-10-13 22:48:57,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 561 places, 519 transitions, 19871 flow, removed 138 selfloop flow, removed 35 redundant places. [2021-10-13 22:48:57,228 INFO L242 Difference]: Finished difference. Result has 567 places, 483 transitions, 16821 flow [2021-10-13 22:48:57,228 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=15460, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=349, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=16821, PETRI_PLACES=567, PETRI_TRANSITIONS=483} [2021-10-13 22:48:57,228 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 501 predicate places. [2021-10-13 22:48:57,229 INFO L470 AbstractCegarLoop]: Abstraction has has 567 places, 483 transitions, 16821 flow [2021-10-13 22:48:57,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.13636363636363) internal successors, (1191), 22 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:57,229 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:48:57,229 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:48:57,261 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 22:48:57,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-10-13 22:48:57,455 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:48:57,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:48:57,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1930647499, now seen corresponding path program 56 times [2021-10-13 22:48:57,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:48:57,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190304365] [2021-10-13 22:48:57,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:48:57,456 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:48:57,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:48:57,633 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:57,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:48:57,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190304365] [2021-10-13 22:48:57,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190304365] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:57,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624213153] [2021-10-13 22:48:57,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:48:57,634 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:48:57,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:48:57,636 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 22:48:57,664 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 22:48:59,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:48:59,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:48:59,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 22:48:59,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:48:59,684 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:48:59,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624213153] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:48:59,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:48:59,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-10-13 22:48:59,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904854766] [2021-10-13 22:48:59,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 22:48:59,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:48:59,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 22:48:59,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-10-13 22:48:59,685 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:48:59,686 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 567 places, 483 transitions, 16821 flow. Second operand has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:48:59,686 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:48:59,686 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:48:59,686 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:01,070 INFO L129 PetriNetUnfolder]: 411/3017 cut-off events. [2021-10-13 22:49:01,070 INFO L130 PetriNetUnfolder]: For 399262/399771 co-relation queries the response was YES. [2021-10-13 22:49:01,107 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26111 conditions, 3017 events. 411/3017 cut-off events. For 399262/399771 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 27468 event pairs, 0 based on Foata normal form. 163/2859 useless extension candidates. Maximal degree in co-relation 25848. Up to 529 conditions per place. [2021-10-13 22:49:01,123 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 102 selfloop transitions, 375 changer transitions 8/529 dead transitions. [2021-10-13 22:49:01,123 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 603 places, 529 transitions, 21637 flow [2021-10-13 22:49:01,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-13 22:49:01,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-10-13 22:49:01,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2227 transitions. [2021-10-13 22:49:01,124 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.843560606060606 [2021-10-13 22:49:01,125 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2227 transitions. [2021-10-13 22:49:01,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2227 transitions. [2021-10-13 22:49:01,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:01,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2227 transitions. [2021-10-13 22:49:01,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 55.675) internal successors, (2227), 40 states have internal predecessors, (2227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:01,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 66.0) internal successors, (2706), 41 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:01,128 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 66.0) internal successors, (2706), 41 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:01,128 INFO L186 Difference]: Start difference. First operand has 567 places, 483 transitions, 16821 flow. Second operand 40 states and 2227 transitions. [2021-10-13 22:49:01,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 603 places, 529 transitions, 21637 flow [2021-10-13 22:49:02,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 567 places, 529 transitions, 20551 flow, removed 211 selfloop flow, removed 36 redundant places. [2021-10-13 22:49:02,269 INFO L242 Difference]: Finished difference. Result has 574 places, 489 transitions, 17278 flow [2021-10-13 22:49:02,270 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=15853, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=369, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=17278, PETRI_PLACES=574, PETRI_TRANSITIONS=489} [2021-10-13 22:49:02,270 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 508 predicate places. [2021-10-13 22:49:02,270 INFO L470 AbstractCegarLoop]: Abstraction has has 574 places, 489 transitions, 17278 flow [2021-10-13 22:49:02,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:02,270 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:02,270 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:49:02,292 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 22:49:02,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:02,471 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:02,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:02,471 INFO L82 PathProgramCache]: Analyzing trace with hash 372932819, now seen corresponding path program 57 times [2021-10-13 22:49:02,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:02,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554159111] [2021-10-13 22:49:02,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:02,471 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:02,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:02,624 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:02,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:02,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554159111] [2021-10-13 22:49:02,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554159111] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:02,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508126010] [2021-10-13 22:49:02,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:49:02,625 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:02,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:02,627 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:49:02,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-10-13 22:49:04,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-13 22:49:04,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:04,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 22:49:04,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:04,769 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:04,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508126010] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:04,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:04,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-10-13 22:49:04,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726359902] [2021-10-13 22:49:04,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 22:49:04,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:04,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 22:49:04,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-10-13 22:49:04,771 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:49:04,771 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 574 places, 489 transitions, 17278 flow. Second operand has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:04,771 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:04,772 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:49:04,772 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:06,235 INFO L129 PetriNetUnfolder]: 417/3056 cut-off events. [2021-10-13 22:49:06,235 INFO L130 PetriNetUnfolder]: For 440406/440996 co-relation queries the response was YES. [2021-10-13 22:49:06,284 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27262 conditions, 3056 events. 417/3056 cut-off events. For 440406/440996 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 27937 event pairs, 0 based on Foata normal form. 168/2900 useless extension candidates. Maximal degree in co-relation 26995. Up to 537 conditions per place. [2021-10-13 22:49:06,301 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 101 selfloop transitions, 385 changer transitions 17/547 dead transitions. [2021-10-13 22:49:06,301 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 547 transitions, 23430 flow [2021-10-13 22:49:06,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-13 22:49:06,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-10-13 22:49:06,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2448 transitions. [2021-10-13 22:49:06,302 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8429752066115702 [2021-10-13 22:49:06,303 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2448 transitions. [2021-10-13 22:49:06,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2448 transitions. [2021-10-13 22:49:06,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:06,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2448 transitions. [2021-10-13 22:49:06,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 55.63636363636363) internal successors, (2448), 44 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:06,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 66.0) internal successors, (2970), 45 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:06,307 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 66.0) internal successors, (2970), 45 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:06,307 INFO L186 Difference]: Start difference. First operand has 574 places, 489 transitions, 17278 flow. Second operand 44 states and 2448 transitions. [2021-10-13 22:49:06,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 547 transitions, 23430 flow [2021-10-13 22:49:07,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 579 places, 547 transitions, 22069 flow, removed 367 selfloop flow, removed 35 redundant places. [2021-10-13 22:49:07,528 INFO L242 Difference]: Finished difference. Result has 589 places, 501 transitions, 18036 flow [2021-10-13 22:49:07,528 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=16287, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=374, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=18036, PETRI_PLACES=589, PETRI_TRANSITIONS=501} [2021-10-13 22:49:07,528 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 523 predicate places. [2021-10-13 22:49:07,529 INFO L470 AbstractCegarLoop]: Abstraction has has 589 places, 501 transitions, 18036 flow [2021-10-13 22:49:07,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:07,529 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:07,529 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:49:07,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-10-13 22:49:07,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:07,730 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:07,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:07,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1607481913, now seen corresponding path program 58 times [2021-10-13 22:49:07,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:07,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027379781] [2021-10-13 22:49:07,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:07,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:07,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:07,956 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:07,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:07,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027379781] [2021-10-13 22:49:07,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027379781] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:07,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099594928] [2021-10-13 22:49:07,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:49:07,957 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:07,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:07,958 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 22:49:07,958 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 22:49:09,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:49:09,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:09,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 22:49:09,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:10,235 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:10,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099594928] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:10,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:10,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-10-13 22:49:10,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723113241] [2021-10-13 22:49:10,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 22:49:10,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:10,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 22:49:10,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-10-13 22:49:10,236 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:49:10,237 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 589 places, 501 transitions, 18036 flow. Second operand has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:10,237 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:10,237 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:49:10,237 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:11,501 INFO L129 PetriNetUnfolder]: 413/3050 cut-off events. [2021-10-13 22:49:11,501 INFO L130 PetriNetUnfolder]: For 471292/471816 co-relation queries the response was YES. [2021-10-13 22:49:11,544 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27628 conditions, 3050 events. 413/3050 cut-off events. For 471292/471816 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 27876 event pairs, 0 based on Foata normal form. 62/2784 useless extension candidates. Maximal degree in co-relation 27354. Up to 659 conditions per place. [2021-10-13 22:49:11,562 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 420 selfloop transitions, 64 changer transitions 8/536 dead transitions. [2021-10-13 22:49:11,562 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 608 places, 536 transitions, 21978 flow [2021-10-13 22:49:11,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-13 22:49:11,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-10-13 22:49:11,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1386 transitions. [2021-10-13 22:49:11,563 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.84 [2021-10-13 22:49:11,563 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1386 transitions. [2021-10-13 22:49:11,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1386 transitions. [2021-10-13 22:49:11,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:11,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1386 transitions. [2021-10-13 22:49:11,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 55.44) internal successors, (1386), 25 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:11,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 66.0) internal successors, (1716), 26 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:11,566 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 66.0) internal successors, (1716), 26 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:11,566 INFO L186 Difference]: Start difference. First operand has 589 places, 501 transitions, 18036 flow. Second operand 25 states and 1386 transitions. [2021-10-13 22:49:11,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 608 places, 536 transitions, 21978 flow [2021-10-13 22:49:12,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 571 places, 536 transitions, 20524 flow, removed 400 selfloop flow, removed 37 redundant places. [2021-10-13 22:49:12,791 INFO L242 Difference]: Finished difference. Result has 576 places, 503 transitions, 17038 flow [2021-10-13 22:49:12,791 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=16670, PETRI_DIFFERENCE_MINUEND_PLACES=547, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=17038, PETRI_PLACES=576, PETRI_TRANSITIONS=503} [2021-10-13 22:49:12,792 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 510 predicate places. [2021-10-13 22:49:12,792 INFO L470 AbstractCegarLoop]: Abstraction has has 576 places, 503 transitions, 17038 flow [2021-10-13 22:49:12,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:12,792 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:12,792 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:49:12,814 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 22:49:12,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-10-13 22:49:12,994 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:12,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:12,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1272892161, now seen corresponding path program 59 times [2021-10-13 22:49:12,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:12,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136063150] [2021-10-13 22:49:12,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:12,994 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:13,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:13,208 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:13,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:13,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136063150] [2021-10-13 22:49:13,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136063150] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:13,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020762048] [2021-10-13 22:49:13,209 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:49:13,209 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:13,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:13,209 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 22:49:13,210 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 22:49:15,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-10-13 22:49:15,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:15,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 22:49:15,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:15,665 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:15,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020762048] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:15,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:15,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-10-13 22:49:15,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762270510] [2021-10-13 22:49:15,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 22:49:15,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:15,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 22:49:15,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-10-13 22:49:15,667 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:49:15,668 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 576 places, 503 transitions, 17038 flow. Second operand has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:15,668 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:15,668 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:49:15,668 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:16,906 INFO L129 PetriNetUnfolder]: 415/3061 cut-off events. [2021-10-13 22:49:16,907 INFO L130 PetriNetUnfolder]: For 469277/469774 co-relation queries the response was YES. [2021-10-13 22:49:16,954 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27254 conditions, 3061 events. 415/3061 cut-off events. For 469277/469774 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 27952 event pairs, 0 based on Foata normal form. 74/2807 useless extension candidates. Maximal degree in co-relation 26979. Up to 527 conditions per place. [2021-10-13 22:49:16,972 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 352 selfloop transitions, 137 changer transitions 8/541 dead transitions. [2021-10-13 22:49:16,972 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 600 places, 541 transitions, 21133 flow [2021-10-13 22:49:16,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 22:49:16,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-13 22:49:16,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1551 transitions. [2021-10-13 22:49:16,973 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8392857142857143 [2021-10-13 22:49:16,973 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1551 transitions. [2021-10-13 22:49:16,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1551 transitions. [2021-10-13 22:49:16,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:16,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1551 transitions. [2021-10-13 22:49:16,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 55.392857142857146) internal successors, (1551), 28 states have internal predecessors, (1551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:16,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 66.0) internal successors, (1914), 29 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:16,976 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 66.0) internal successors, (1914), 29 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:16,976 INFO L186 Difference]: Start difference. First operand has 576 places, 503 transitions, 17038 flow. Second operand 28 states and 1551 transitions. [2021-10-13 22:49:16,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 600 places, 541 transitions, 21133 flow [2021-10-13 22:49:18,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 578 places, 541 transitions, 20723 flow, removed 145 selfloop flow, removed 22 redundant places. [2021-10-13 22:49:18,397 INFO L242 Difference]: Finished difference. Result has 583 places, 505 transitions, 17284 flow [2021-10-13 22:49:18,398 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=16760, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=17284, PETRI_PLACES=583, PETRI_TRANSITIONS=505} [2021-10-13 22:49:18,398 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 517 predicate places. [2021-10-13 22:49:18,398 INFO L470 AbstractCegarLoop]: Abstraction has has 583 places, 505 transitions, 17284 flow [2021-10-13 22:49:18,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:18,398 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:18,398 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:49:18,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-10-13 22:49:18,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-10-13 22:49:18,599 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:18,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:18,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1721781235, now seen corresponding path program 60 times [2021-10-13 22:49:18,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:18,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399293223] [2021-10-13 22:49:18,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:18,600 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:18,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:18,814 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:18,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:18,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399293223] [2021-10-13 22:49:18,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399293223] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:18,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379615693] [2021-10-13 22:49:18,814 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:49:18,814 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:18,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:18,815 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 22:49:18,816 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 22:49:20,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-10-13 22:49:20,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:20,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 22:49:20,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:21,202 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:21,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379615693] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:21,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:21,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-10-13 22:49:21,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291672601] [2021-10-13 22:49:21,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:49:21,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:21,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:49:21,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:49:21,204 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:49:21,206 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 505 transitions, 17284 flow. Second operand has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:21,206 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:21,206 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:49:21,206 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:22,658 INFO L129 PetriNetUnfolder]: 419/3104 cut-off events. [2021-10-13 22:49:22,659 INFO L130 PetriNetUnfolder]: For 471152/471600 co-relation queries the response was YES. [2021-10-13 22:49:22,698 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27612 conditions, 3104 events. 419/3104 cut-off events. For 471152/471600 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 28480 event pairs, 0 based on Foata normal form. 93/2864 useless extension candidates. Maximal degree in co-relation 27335. Up to 535 conditions per place. [2021-10-13 22:49:22,716 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 303 selfloop transitions, 191 changer transitions 8/546 dead transitions. [2021-10-13 22:49:22,716 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 610 places, 546 transitions, 21597 flow [2021-10-13 22:49:22,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-13 22:49:22,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-13 22:49:22,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1718 transitions. [2021-10-13 22:49:22,718 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8396871945259042 [2021-10-13 22:49:22,718 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1718 transitions. [2021-10-13 22:49:22,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1718 transitions. [2021-10-13 22:49:22,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:22,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1718 transitions. [2021-10-13 22:49:22,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 55.41935483870968) internal successors, (1718), 31 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:22,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 66.0) internal successors, (2112), 32 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:22,721 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 66.0) internal successors, (2112), 32 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:22,721 INFO L186 Difference]: Start difference. First operand has 583 places, 505 transitions, 17284 flow. Second operand 31 states and 1718 transitions. [2021-10-13 22:49:22,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 610 places, 546 transitions, 21597 flow [2021-10-13 22:49:24,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 585 places, 546 transitions, 21085 flow, removed 129 selfloop flow, removed 25 redundant places. [2021-10-13 22:49:24,258 INFO L242 Difference]: Finished difference. Result has 590 places, 509 transitions, 17642 flow [2021-10-13 22:49:24,258 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=16884, PETRI_DIFFERENCE_MINUEND_PLACES=555, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=17642, PETRI_PLACES=590, PETRI_TRANSITIONS=509} [2021-10-13 22:49:24,258 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 524 predicate places. [2021-10-13 22:49:24,259 INFO L470 AbstractCegarLoop]: Abstraction has has 590 places, 509 transitions, 17642 flow [2021-10-13 22:49:24,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:24,259 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:24,259 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:49:24,282 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 22:49:24,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:24,460 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:24,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:24,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1506694047, now seen corresponding path program 61 times [2021-10-13 22:49:24,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:24,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214759573] [2021-10-13 22:49:24,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:24,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:24,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:24,646 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:24,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:24,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214759573] [2021-10-13 22:49:24,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214759573] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:24,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047412143] [2021-10-13 22:49:24,647 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:49:24,647 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:24,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:24,647 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 22:49:24,648 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 22:49:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:26,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 22:49:26,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:27,024 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:27,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047412143] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:27,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:27,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-10-13 22:49:27,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981475257] [2021-10-13 22:49:27,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 22:49:27,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:27,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 22:49:27,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-10-13 22:49:27,026 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:49:27,027 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 590 places, 509 transitions, 17642 flow. Second operand has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:27,027 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:27,027 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:49:27,027 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:28,400 INFO L129 PetriNetUnfolder]: 423/3133 cut-off events. [2021-10-13 22:49:28,401 INFO L130 PetriNetUnfolder]: For 477510/478002 co-relation queries the response was YES. [2021-10-13 22:49:28,445 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28031 conditions, 3133 events. 423/3133 cut-off events. For 477510/478002 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 28754 event pairs, 0 based on Foata normal form. 94/2891 useless extension candidates. Maximal degree in co-relation 27752. Up to 543 conditions per place. [2021-10-13 22:49:28,553 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 273 selfloop transitions, 225 changer transitions 8/550 dead transitions. [2021-10-13 22:49:28,554 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 616 places, 550 transitions, 22034 flow [2021-10-13 22:49:28,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 22:49:28,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-10-13 22:49:28,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1663 transitions. [2021-10-13 22:49:28,555 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8398989898989899 [2021-10-13 22:49:28,555 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1663 transitions. [2021-10-13 22:49:28,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1663 transitions. [2021-10-13 22:49:28,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:28,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1663 transitions. [2021-10-13 22:49:28,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 55.43333333333333) internal successors, (1663), 30 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:28,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:28,558 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:28,558 INFO L186 Difference]: Start difference. First operand has 590 places, 509 transitions, 17642 flow. Second operand 30 states and 1663 transitions. [2021-10-13 22:49:28,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 616 places, 550 transitions, 22034 flow [2021-10-13 22:49:29,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 589 places, 550 transitions, 21431 flow, removed 135 selfloop flow, removed 27 redundant places. [2021-10-13 22:49:29,949 INFO L242 Difference]: Finished difference. Result has 596 places, 513 transitions, 18011 flow [2021-10-13 22:49:29,950 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=17155, PETRI_DIFFERENCE_MINUEND_PLACES=560, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=18011, PETRI_PLACES=596, PETRI_TRANSITIONS=513} [2021-10-13 22:49:29,950 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 530 predicate places. [2021-10-13 22:49:29,950 INFO L470 AbstractCegarLoop]: Abstraction has has 596 places, 513 transitions, 18011 flow [2021-10-13 22:49:29,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:29,950 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:29,950 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:49:29,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-10-13 22:49:30,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-10-13 22:49:30,175 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:30,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:30,176 INFO L82 PathProgramCache]: Analyzing trace with hash -569729003, now seen corresponding path program 62 times [2021-10-13 22:49:30,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:30,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161969711] [2021-10-13 22:49:30,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:30,176 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:30,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:30,406 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:30,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:30,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161969711] [2021-10-13 22:49:30,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161969711] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:30,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475990411] [2021-10-13 22:49:30,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:49:30,406 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:30,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:30,407 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 22:49:30,409 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 22:49:32,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:49:32,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:32,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 22:49:32,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:32,790 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:32,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475990411] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:32,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:32,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-10-13 22:49:32,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752116721] [2021-10-13 22:49:32,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 22:49:32,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:32,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 22:49:32,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-10-13 22:49:32,792 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:49:32,793 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 596 places, 513 transitions, 18011 flow. Second operand has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:32,793 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:32,793 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:49:32,793 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:34,236 INFO L129 PetriNetUnfolder]: 433/3230 cut-off events. [2021-10-13 22:49:34,236 INFO L130 PetriNetUnfolder]: For 493068/493548 co-relation queries the response was YES. [2021-10-13 22:49:34,279 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28981 conditions, 3230 events. 433/3230 cut-off events. For 493068/493548 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 29882 event pairs, 0 based on Foata normal form. 102/2987 useless extension candidates. Maximal degree in co-relation 28698. Up to 561 conditions per place. [2021-10-13 22:49:34,298 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 239 selfloop transitions, 270 changer transitions 8/561 dead transitions. [2021-10-13 22:49:34,298 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 624 places, 561 transitions, 22966 flow [2021-10-13 22:49:34,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 22:49:34,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-10-13 22:49:34,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1775 transitions. [2021-10-13 22:49:34,299 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8404356060606061 [2021-10-13 22:49:34,299 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1775 transitions. [2021-10-13 22:49:34,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1775 transitions. [2021-10-13 22:49:34,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:34,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1775 transitions. [2021-10-13 22:49:34,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.46875) internal successors, (1775), 32 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:34,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 66.0) internal successors, (2178), 33 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:34,302 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 66.0) internal successors, (2178), 33 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:34,302 INFO L186 Difference]: Start difference. First operand has 596 places, 513 transitions, 18011 flow. Second operand 32 states and 1775 transitions. [2021-10-13 22:49:34,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 624 places, 561 transitions, 22966 flow [2021-10-13 22:49:35,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 603 places, 561 transitions, 22458 flow, removed 137 selfloop flow, removed 21 redundant places. [2021-10-13 22:49:35,973 INFO L242 Difference]: Finished difference. Result has 612 places, 523 transitions, 19020 flow [2021-10-13 22:49:35,973 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=17627, PETRI_DIFFERENCE_MINUEND_PLACES=572, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=19020, PETRI_PLACES=612, PETRI_TRANSITIONS=523} [2021-10-13 22:49:35,973 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 546 predicate places. [2021-10-13 22:49:35,973 INFO L470 AbstractCegarLoop]: Abstraction has has 612 places, 523 transitions, 19020 flow [2021-10-13 22:49:35,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:35,974 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:35,974 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:49:36,000 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 22:49:36,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:36,174 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:36,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:36,175 INFO L82 PathProgramCache]: Analyzing trace with hash 18414377, now seen corresponding path program 63 times [2021-10-13 22:49:36,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:36,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320369941] [2021-10-13 22:49:36,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:36,175 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:36,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:36,410 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:36,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:36,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320369941] [2021-10-13 22:49:36,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320369941] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:36,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719955312] [2021-10-13 22:49:36,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:49:36,410 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:36,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:36,412 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 22:49:36,412 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 22:49:38,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-13 22:49:38,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:38,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-13 22:49:38,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:38,886 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 4 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:38,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719955312] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:38,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:38,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-10-13 22:49:38,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423252100] [2021-10-13 22:49:38,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:49:38,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:38,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:49:38,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:49:38,889 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:49:38,889 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 612 places, 523 transitions, 19020 flow. Second operand has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:38,889 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:38,889 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:49:38,890 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:40,520 INFO L129 PetriNetUnfolder]: 446/3354 cut-off events. [2021-10-13 22:49:40,521 INFO L130 PetriNetUnfolder]: For 513177/513607 co-relation queries the response was YES. [2021-10-13 22:49:40,569 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30326 conditions, 3354 events. 446/3354 cut-off events. For 513177/513607 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 31391 event pairs, 0 based on Foata normal form. 130/3126 useless extension candidates. Maximal degree in co-relation 30037. Up to 585 conditions per place. [2021-10-13 22:49:40,589 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 161 selfloop transitions, 366 changer transitions 8/579 dead transitions. [2021-10-13 22:49:40,589 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 643 places, 579 transitions, 24552 flow [2021-10-13 22:49:40,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-13 22:49:40,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-10-13 22:49:40,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1943 transitions. [2021-10-13 22:49:40,591 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8411255411255412 [2021-10-13 22:49:40,591 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1943 transitions. [2021-10-13 22:49:40,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1943 transitions. [2021-10-13 22:49:40,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:40,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1943 transitions. [2021-10-13 22:49:40,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 55.51428571428571) internal successors, (1943), 35 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:40,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 66.0) internal successors, (2376), 36 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:40,593 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 66.0) internal successors, (2376), 36 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:40,593 INFO L186 Difference]: Start difference. First operand has 612 places, 523 transitions, 19020 flow. Second operand 35 states and 1943 transitions. [2021-10-13 22:49:40,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 643 places, 579 transitions, 24552 flow [2021-10-13 22:49:42,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 621 places, 579 transitions, 23958 flow, removed 157 selfloop flow, removed 22 redundant places. [2021-10-13 22:49:42,403 INFO L242 Difference]: Finished difference. Result has 631 places, 538 transitions, 20454 flow [2021-10-13 22:49:42,404 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=18566, PETRI_DIFFERENCE_MINUEND_PLACES=587, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=351, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=20454, PETRI_PLACES=631, PETRI_TRANSITIONS=538} [2021-10-13 22:49:42,404 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 565 predicate places. [2021-10-13 22:49:42,404 INFO L470 AbstractCegarLoop]: Abstraction has has 631 places, 538 transitions, 20454 flow [2021-10-13 22:49:42,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:42,404 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:42,404 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:49:42,428 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 22:49:42,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:42,605 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:42,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:42,605 INFO L82 PathProgramCache]: Analyzing trace with hash 689973979, now seen corresponding path program 64 times [2021-10-13 22:49:42,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:42,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247911139] [2021-10-13 22:49:42,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:42,606 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:42,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:42,771 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:42,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:42,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247911139] [2021-10-13 22:49:42,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247911139] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:42,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529205355] [2021-10-13 22:49:42,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:49:42,772 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:42,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:42,773 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 22:49:42,773 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 22:49:44,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:49:44,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:44,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 22:49:44,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:45,173 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:45,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529205355] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:45,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:45,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-10-13 22:49:45,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290117540] [2021-10-13 22:49:45,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 22:49:45,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:45,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 22:49:45,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-10-13 22:49:45,175 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:49:45,176 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 631 places, 538 transitions, 20454 flow. Second operand has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:45,176 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:45,176 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:49:45,176 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:46,804 INFO L129 PetriNetUnfolder]: 450/3390 cut-off events. [2021-10-13 22:49:46,805 INFO L130 PetriNetUnfolder]: For 536873/537328 co-relation queries the response was YES. [2021-10-13 22:49:46,855 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31233 conditions, 3390 events. 450/3390 cut-off events. For 536873/537328 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 31768 event pairs, 0 based on Foata normal form. 152/3180 useless extension candidates. Maximal degree in co-relation 30937. Up to 593 conditions per place. [2021-10-13 22:49:46,875 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 135 selfloop transitions, 396 changer transitions 8/583 dead transitions. [2021-10-13 22:49:46,876 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 663 places, 583 transitions, 25607 flow [2021-10-13 22:49:46,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-13 22:49:46,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-10-13 22:49:46,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1999 transitions. [2021-10-13 22:49:46,877 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8413299663299664 [2021-10-13 22:49:46,877 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1999 transitions. [2021-10-13 22:49:46,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1999 transitions. [2021-10-13 22:49:46,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:46,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1999 transitions. [2021-10-13 22:49:46,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 55.52777777777778) internal successors, (1999), 36 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:46,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:46,881 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:46,881 INFO L186 Difference]: Start difference. First operand has 631 places, 538 transitions, 20454 flow. Second operand 36 states and 1999 transitions. [2021-10-13 22:49:46,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 663 places, 583 transitions, 25607 flow [2021-10-13 22:49:48,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 636 places, 583 transitions, 24769 flow, removed 193 selfloop flow, removed 27 redundant places. [2021-10-13 22:49:48,702 INFO L242 Difference]: Finished difference. Result has 641 places, 542 transitions, 20916 flow [2021-10-13 22:49:48,703 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=19714, PETRI_DIFFERENCE_MINUEND_PLACES=601, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=392, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=20916, PETRI_PLACES=641, PETRI_TRANSITIONS=542} [2021-10-13 22:49:48,703 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 575 predicate places. [2021-10-13 22:49:48,703 INFO L470 AbstractCegarLoop]: Abstraction has has 641 places, 542 transitions, 20916 flow [2021-10-13 22:49:48,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:48,703 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:48,703 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:49:48,727 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 22:49:48,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-10-13 22:49:48,906 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:48,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:48,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1673368225, now seen corresponding path program 65 times [2021-10-13 22:49:48,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:48,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558122133] [2021-10-13 22:49:48,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:48,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:48,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:49,111 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:49,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:49,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558122133] [2021-10-13 22:49:49,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558122133] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:49,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504756097] [2021-10-13 22:49:49,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:49:49,112 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:49,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:49,113 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 22:49:49,113 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 22:49:51,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-10-13 22:49:51,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:51,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 22:49:51,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:51,585 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:51,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504756097] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:51,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:51,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-10-13 22:49:51,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398967928] [2021-10-13 22:49:51,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:49:51,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:51,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:49:51,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:49:51,586 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:49:51,587 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 641 places, 542 transitions, 20916 flow. Second operand has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:51,587 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:51,587 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:49:51,587 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:49:53,325 INFO L129 PetriNetUnfolder]: 455/3428 cut-off events. [2021-10-13 22:49:53,325 INFO L130 PetriNetUnfolder]: For 555396/555874 co-relation queries the response was YES. [2021-10-13 22:49:53,380 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32002 conditions, 3428 events. 455/3428 cut-off events. For 555396/555874 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 32283 event pairs, 0 based on Foata normal form. 162/3225 useless extension candidates. Maximal degree in co-relation 31704. Up to 601 conditions per place. [2021-10-13 22:49:53,461 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 120 selfloop transitions, 420 changer transitions 8/592 dead transitions. [2021-10-13 22:49:53,461 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 676 places, 592 transitions, 26395 flow [2021-10-13 22:49:53,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-13 22:49:53,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-10-13 22:49:53,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2166 transitions. [2021-10-13 22:49:53,464 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8414918414918415 [2021-10-13 22:49:53,464 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2166 transitions. [2021-10-13 22:49:53,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2166 transitions. [2021-10-13 22:49:53,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:49:53,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2166 transitions. [2021-10-13 22:49:53,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 55.53846153846154) internal successors, (2166), 39 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:53,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 66.0) internal successors, (2640), 40 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:53,468 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 66.0) internal successors, (2640), 40 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:53,468 INFO L186 Difference]: Start difference. First operand has 641 places, 542 transitions, 20916 flow. Second operand 39 states and 2166 transitions. [2021-10-13 22:49:53,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 676 places, 592 transitions, 26395 flow [2021-10-13 22:49:55,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 644 places, 592 transitions, 25349 flow, removed 178 selfloop flow, removed 32 redundant places. [2021-10-13 22:49:55,424 INFO L242 Difference]: Finished difference. Result has 652 places, 549 transitions, 21570 flow [2021-10-13 22:49:55,424 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=20064, PETRI_DIFFERENCE_MINUEND_PLACES=606, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=413, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=21570, PETRI_PLACES=652, PETRI_TRANSITIONS=549} [2021-10-13 22:49:55,424 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 586 predicate places. [2021-10-13 22:49:55,424 INFO L470 AbstractCegarLoop]: Abstraction has has 652 places, 549 transitions, 21570 flow [2021-10-13 22:49:55,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:55,425 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:49:55,425 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:49:55,448 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 22:49:55,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:55,625 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:49:55,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:49:55,626 INFO L82 PathProgramCache]: Analyzing trace with hash -2066180995, now seen corresponding path program 66 times [2021-10-13 22:49:55,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:49:55,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899855460] [2021-10-13 22:49:55,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:49:55,626 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:49:55,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:49:55,821 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:55,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:49:55,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899855460] [2021-10-13 22:49:55,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899855460] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:55,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716933584] [2021-10-13 22:49:55,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:49:55,822 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:49:55,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:49:55,823 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 22:49:55,824 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 22:49:58,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-10-13 22:49:58,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:49:58,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 22:49:58,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:49:58,260 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:49:58,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716933584] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:49:58,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:49:58,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-10-13 22:49:58,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911649586] [2021-10-13 22:49:58,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 22:49:58,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:49:58,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 22:49:58,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-10-13 22:49:58,262 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:49:58,262 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 652 places, 549 transitions, 21570 flow. Second operand has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:49:58,262 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:49:58,263 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:49:58,263 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:50:00,031 INFO L129 PetriNetUnfolder]: 459/3443 cut-off events. [2021-10-13 22:50:00,031 INFO L130 PetriNetUnfolder]: For 565907/566438 co-relation queries the response was YES. [2021-10-13 22:50:00,103 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32480 conditions, 3443 events. 459/3443 cut-off events. For 565907/566438 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 32420 event pairs, 0 based on Foata normal form. 163/3239 useless extension candidates. Maximal degree in co-relation 32177. Up to 609 conditions per place. [2021-10-13 22:50:00,136 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 115 selfloop transitions, 431 changer transitions 8/598 dead transitions. [2021-10-13 22:50:00,136 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 686 places, 598 transitions, 27099 flow [2021-10-13 22:50:00,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-13 22:50:00,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-10-13 22:50:00,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2111 transitions. [2021-10-13 22:50:00,138 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8417065390749602 [2021-10-13 22:50:00,138 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2111 transitions. [2021-10-13 22:50:00,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2111 transitions. [2021-10-13 22:50:00,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:50:00,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2111 transitions. [2021-10-13 22:50:00,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 55.55263157894737) internal successors, (2111), 38 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:00,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 66.0) internal successors, (2574), 39 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:00,143 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 66.0) internal successors, (2574), 39 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:00,143 INFO L186 Difference]: Start difference. First operand has 652 places, 549 transitions, 21570 flow. Second operand 38 states and 2111 transitions. [2021-10-13 22:50:00,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 686 places, 598 transitions, 27099 flow [2021-10-13 22:50:01,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 652 places, 598 transitions, 26023 flow, removed 204 selfloop flow, removed 34 redundant places. [2021-10-13 22:50:01,899 INFO L242 Difference]: Finished difference. Result has 659 places, 555 transitions, 22027 flow [2021-10-13 22:50:01,900 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=20606, PETRI_DIFFERENCE_MINUEND_PLACES=615, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=425, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=22027, PETRI_PLACES=659, PETRI_TRANSITIONS=555} [2021-10-13 22:50:01,900 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 593 predicate places. [2021-10-13 22:50:01,900 INFO L470 AbstractCegarLoop]: Abstraction has has 659 places, 555 transitions, 22027 flow [2021-10-13 22:50:01,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:01,900 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:50:01,901 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:50:01,926 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 22:50:02,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:02,103 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:50:02,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:50:02,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1354131107, now seen corresponding path program 67 times [2021-10-13 22:50:02,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:50:02,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35390634] [2021-10-13 22:50:02,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:50:02,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:50:02,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:50:02,261 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:02,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:50:02,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35390634] [2021-10-13 22:50:02,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35390634] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:02,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856382247] [2021-10-13 22:50:02,262 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:50:02,262 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:02,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:50:02,262 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 22:50:02,263 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 22:50:04,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:50:04,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 22:50:04,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:50:04,787 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:04,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856382247] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:04,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:50:04,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-10-13 22:50:04,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953742415] [2021-10-13 22:50:04,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 22:50:04,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:50:04,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 22:50:04,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-10-13 22:50:04,789 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:50:04,789 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 659 places, 555 transitions, 22027 flow. Second operand has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:04,789 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:50:04,789 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:50:04,789 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:50:06,486 INFO L129 PetriNetUnfolder]: 474/3545 cut-off events. [2021-10-13 22:50:06,486 INFO L130 PetriNetUnfolder]: For 604812/605287 co-relation queries the response was YES. [2021-10-13 22:50:06,549 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34146 conditions, 3545 events. 474/3545 cut-off events. For 604812/605287 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 33327 event pairs, 0 based on Foata normal form. 173/3342 useless extension candidates. Maximal degree in co-relation 33840. Up to 627 conditions per place. [2021-10-13 22:50:06,696 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 108 selfloop transitions, 450 changer transitions 8/610 dead transitions. [2021-10-13 22:50:06,696 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 695 places, 610 transitions, 28213 flow [2021-10-13 22:50:06,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-13 22:50:06,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-10-13 22:50:06,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2227 transitions. [2021-10-13 22:50:06,698 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.843560606060606 [2021-10-13 22:50:06,698 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2227 transitions. [2021-10-13 22:50:06,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2227 transitions. [2021-10-13 22:50:06,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:50:06,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2227 transitions. [2021-10-13 22:50:06,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 55.675) internal successors, (2227), 40 states have internal predecessors, (2227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:06,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 66.0) internal successors, (2706), 41 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:06,703 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 66.0) internal successors, (2706), 41 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:06,703 INFO L186 Difference]: Start difference. First operand has 659 places, 555 transitions, 22027 flow. Second operand 40 states and 2227 transitions. [2021-10-13 22:50:06,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 695 places, 610 transitions, 28213 flow [2021-10-13 22:50:08,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 661 places, 610 transitions, 26955 flow, removed 245 selfloop flow, removed 34 redundant places. [2021-10-13 22:50:08,917 INFO L242 Difference]: Finished difference. Result has 668 places, 561 transitions, 22597 flow [2021-10-13 22:50:08,917 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=20971, PETRI_DIFFERENCE_MINUEND_PLACES=622, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=444, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=22597, PETRI_PLACES=668, PETRI_TRANSITIONS=561} [2021-10-13 22:50:08,917 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 602 predicate places. [2021-10-13 22:50:08,918 INFO L470 AbstractCegarLoop]: Abstraction has has 668 places, 561 transitions, 22597 flow [2021-10-13 22:50:08,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:08,918 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:50:08,918 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:50:08,951 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 22:50:09,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:09,131 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:50:09,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:50:09,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1469788317, now seen corresponding path program 68 times [2021-10-13 22:50:09,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:50:09,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298922123] [2021-10-13 22:50:09,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:50:09,132 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:50:09,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:50:09,282 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:09,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:50:09,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298922123] [2021-10-13 22:50:09,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298922123] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:09,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647906608] [2021-10-13 22:50:09,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:50:09,283 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:09,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:50:09,283 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 22:50:09,284 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 22:50:11,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:50:11,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:50:11,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 22:50:11,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:50:11,817 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:11,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647906608] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:11,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:50:11,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-10-13 22:50:11,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471427561] [2021-10-13 22:50:11,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:50:11,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:50:11,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:50:11,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:50:11,819 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:50:11,820 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 668 places, 561 transitions, 22597 flow. Second operand has 23 states, 23 states have (on average 54.08695652173913) internal successors, (1244), 23 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:11,820 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:50:11,820 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:50:11,820 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:50:13,861 INFO L129 PetriNetUnfolder]: 475/3541 cut-off events. [2021-10-13 22:50:13,861 INFO L130 PetriNetUnfolder]: For 634817/635339 co-relation queries the response was YES. [2021-10-13 22:50:13,923 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34838 conditions, 3541 events. 475/3541 cut-off events. For 634817/635339 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 33287 event pairs, 0 based on Foata normal form. 181/3347 useless extension candidates. Maximal degree in co-relation 34528. Up to 629 conditions per place. [2021-10-13 22:50:13,964 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 100 selfloop transitions, 462 changer transitions 17/623 dead transitions. [2021-10-13 22:50:13,964 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 708 places, 623 transitions, 30015 flow [2021-10-13 22:50:13,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-13 22:50:13,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-10-13 22:50:13,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2448 transitions. [2021-10-13 22:50:13,967 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8429752066115702 [2021-10-13 22:50:13,967 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2448 transitions. [2021-10-13 22:50:13,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2448 transitions. [2021-10-13 22:50:13,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:50:13,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2448 transitions. [2021-10-13 22:50:13,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 55.63636363636363) internal successors, (2448), 44 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:13,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 66.0) internal successors, (2970), 45 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:13,972 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 66.0) internal successors, (2970), 45 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:13,972 INFO L186 Difference]: Start difference. First operand has 668 places, 561 transitions, 22597 flow. Second operand 44 states and 2448 transitions. [2021-10-13 22:50:13,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 708 places, 623 transitions, 30015 flow [2021-10-13 22:50:15,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 674 places, 623 transitions, 28430 flow, removed 399 selfloop flow, removed 34 redundant places. [2021-10-13 22:50:15,993 INFO L242 Difference]: Finished difference. Result has 684 places, 569 transitions, 23211 flow [2021-10-13 22:50:15,993 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=21420, PETRI_DIFFERENCE_MINUEND_PLACES=631, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=454, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=23211, PETRI_PLACES=684, PETRI_TRANSITIONS=569} [2021-10-13 22:50:15,993 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 618 predicate places. [2021-10-13 22:50:15,994 INFO L470 AbstractCegarLoop]: Abstraction has has 684 places, 569 transitions, 23211 flow [2021-10-13 22:50:15,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.08695652173913) internal successors, (1244), 23 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:15,994 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:50:15,994 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:50:16,018 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 22:50:16,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-10-13 22:50:16,195 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:50:16,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:50:16,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1214756753, now seen corresponding path program 69 times [2021-10-13 22:50:16,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:50:16,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139422121] [2021-10-13 22:50:16,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:50:16,195 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:50:16,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:50:16,389 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 22:50:16,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:50:16,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139422121] [2021-10-13 22:50:16,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139422121] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:16,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326846279] [2021-10-13 22:50:16,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:50:16,390 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:16,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:50:16,391 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 22:50:16,392 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 22:50:18,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-10-13 22:50:18,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:50:18,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 22:50:18,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:50:19,031 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 22:50:19,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326846279] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:19,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:50:19,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-10-13 22:50:19,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387420237] [2021-10-13 22:50:19,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:50:19,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:50:19,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:50:19,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:50:19,033 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:50:19,034 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 684 places, 569 transitions, 23211 flow. Second operand has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:19,034 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:50:19,034 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:50:19,034 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:50:20,989 INFO L129 PetriNetUnfolder]: 502/3754 cut-off events. [2021-10-13 22:50:20,990 INFO L130 PetriNetUnfolder]: For 741475/741979 co-relation queries the response was YES. [2021-10-13 22:50:21,055 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38267 conditions, 3754 events. 502/3754 cut-off events. For 741475/741979 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 35929 event pairs, 0 based on Foata normal form. 185/3540 useless extension candidates. Maximal degree in co-relation 37950. Up to 675 conditions per place. [2021-10-13 22:50:21,090 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 149 selfloop transitions, 440 changer transitions 11/644 dead transitions. [2021-10-13 22:50:21,091 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 722 places, 644 transitions, 31250 flow [2021-10-13 22:50:21,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-13 22:50:21,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-10-13 22:50:21,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2447 transitions. [2021-10-13 22:50:21,093 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8426308539944903 [2021-10-13 22:50:21,093 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2447 transitions. [2021-10-13 22:50:21,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2447 transitions. [2021-10-13 22:50:21,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:50:21,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2447 transitions. [2021-10-13 22:50:21,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 55.61363636363637) internal successors, (2447), 44 states have internal predecessors, (2447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:21,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 66.0) internal successors, (2970), 45 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:21,097 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 66.0) internal successors, (2970), 45 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:21,098 INFO L186 Difference]: Start difference. First operand has 684 places, 569 transitions, 23211 flow. Second operand 44 states and 2447 transitions. [2021-10-13 22:50:21,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 722 places, 644 transitions, 31250 flow [2021-10-13 22:50:23,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 684 places, 644 transitions, 29561 flow, removed 429 selfloop flow, removed 38 redundant places. [2021-10-13 22:50:23,420 INFO L242 Difference]: Finished difference. Result has 693 places, 603 transitions, 25101 flow [2021-10-13 22:50:23,421 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=21696, PETRI_DIFFERENCE_MINUEND_PLACES=641, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=407, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=25101, PETRI_PLACES=693, PETRI_TRANSITIONS=603} [2021-10-13 22:50:23,421 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 627 predicate places. [2021-10-13 22:50:23,421 INFO L470 AbstractCegarLoop]: Abstraction has has 693 places, 603 transitions, 25101 flow [2021-10-13 22:50:23,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:23,421 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:50:23,421 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:50:23,445 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 22:50:23,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:23,622 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:50:23,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:50:23,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1073459419, now seen corresponding path program 70 times [2021-10-13 22:50:23,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:50:23,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975150466] [2021-10-13 22:50:23,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:50:23,622 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:50:23,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:50:23,798 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 316 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 22:50:23,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:50:23,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975150466] [2021-10-13 22:50:23,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975150466] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:23,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540854933] [2021-10-13 22:50:23,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:50:23,799 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:23,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:50:23,800 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 22:50:23,800 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 22:50:26,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:50:26,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:50:26,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 22:50:26,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:50:26,464 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 316 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 22:50:26,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540854933] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:26,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:50:26,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-10-13 22:50:26,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083202744] [2021-10-13 22:50:26,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:50:26,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:50:26,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:50:26,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-10-13 22:50:26,466 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:50:26,466 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 693 places, 603 transitions, 25101 flow. Second operand has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:26,466 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:50:26,466 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:50:26,466 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:50:28,551 INFO L129 PetriNetUnfolder]: 501/3753 cut-off events. [2021-10-13 22:50:28,551 INFO L130 PetriNetUnfolder]: For 795676/796218 co-relation queries the response was YES. [2021-10-13 22:50:28,614 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38906 conditions, 3753 events. 501/3753 cut-off events. For 795676/796218 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 35874 event pairs, 0 based on Foata normal form. 191/3545 useless extension candidates. Maximal degree in co-relation 38585. Up to 671 conditions per place. [2021-10-13 22:50:28,641 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 113 selfloop transitions, 488 changer transitions 5/650 dead transitions. [2021-10-13 22:50:28,641 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 727 places, 650 transitions, 31472 flow [2021-10-13 22:50:28,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-13 22:50:28,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-10-13 22:50:28,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2167 transitions. [2021-10-13 22:50:28,642 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8418803418803419 [2021-10-13 22:50:28,642 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2167 transitions. [2021-10-13 22:50:28,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2167 transitions. [2021-10-13 22:50:28,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:50:28,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2167 transitions. [2021-10-13 22:50:28,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 55.56410256410256) internal successors, (2167), 39 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:28,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 66.0) internal successors, (2640), 40 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:28,647 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 66.0) internal successors, (2640), 40 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:28,647 INFO L186 Difference]: Start difference. First operand has 693 places, 603 transitions, 25101 flow. Second operand 39 states and 2167 transitions. [2021-10-13 22:50:28,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 727 places, 650 transitions, 31472 flow [2021-10-13 22:50:31,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 689 places, 650 transitions, 29165 flow, removed 794 selfloop flow, removed 38 redundant places. [2021-10-13 22:50:32,007 INFO L242 Difference]: Finished difference. Result has 693 places, 606 transitions, 24594 flow [2021-10-13 22:50:32,007 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=23258, PETRI_DIFFERENCE_MINUEND_PLACES=651, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=485, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=24594, PETRI_PLACES=693, PETRI_TRANSITIONS=606} [2021-10-13 22:50:32,007 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 627 predicate places. [2021-10-13 22:50:32,007 INFO L470 AbstractCegarLoop]: Abstraction has has 693 places, 606 transitions, 24594 flow [2021-10-13 22:50:32,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:32,008 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:50:32,008 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:50:32,035 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 22:50:32,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:32,208 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:50:32,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:50:32,209 INFO L82 PathProgramCache]: Analyzing trace with hash -682539498, now seen corresponding path program 71 times [2021-10-13 22:50:32,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:50:32,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569470271] [2021-10-13 22:50:32,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:50:32,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:50:32,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:50:32,512 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:32,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:50:32,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569470271] [2021-10-13 22:50:32,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569470271] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:32,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2570321] [2021-10-13 22:50:32,512 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:50:32,512 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:32,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:50:32,513 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 22:50:32,514 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 22:50:34,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-10-13 22:50:34,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:50:34,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 22:50:34,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:50:35,372 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:35,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2570321] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:35,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:50:35,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-10-13 22:50:35,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087411956] [2021-10-13 22:50:35,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 22:50:35,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:50:35,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 22:50:35,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-10-13 22:50:35,374 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:50:35,375 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 693 places, 606 transitions, 24594 flow. Second operand has 24 states, 24 states have (on average 54.083333333333336) internal successors, (1298), 24 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:35,375 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:50:35,375 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:50:35,375 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:50:37,104 INFO L129 PetriNetUnfolder]: 507/3799 cut-off events. [2021-10-13 22:50:37,105 INFO L130 PetriNetUnfolder]: For 744405/745011 co-relation queries the response was YES. [2021-10-13 22:50:37,164 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37853 conditions, 3799 events. 507/3799 cut-off events. For 744405/745011 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 36242 event pairs, 0 based on Foata normal form. 69/3459 useless extension candidates. Maximal degree in co-relation 37532. Up to 829 conditions per place. [2021-10-13 22:50:37,189 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 525 selfloop transitions, 70 changer transitions 8/647 dead transitions. [2021-10-13 22:50:37,190 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 717 places, 647 transitions, 29483 flow [2021-10-13 22:50:37,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-13 22:50:37,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-10-13 22:50:37,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1496 transitions. [2021-10-13 22:50:37,191 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8395061728395061 [2021-10-13 22:50:37,191 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1496 transitions. [2021-10-13 22:50:37,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1496 transitions. [2021-10-13 22:50:37,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:50:37,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1496 transitions. [2021-10-13 22:50:37,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 55.407407407407405) internal successors, (1496), 27 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:37,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 66.0) internal successors, (1848), 28 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:37,194 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 66.0) internal successors, (1848), 28 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:37,194 INFO L186 Difference]: Start difference. First operand has 693 places, 606 transitions, 24594 flow. Second operand 27 states and 1496 transitions. [2021-10-13 22:50:37,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 717 places, 647 transitions, 29483 flow [2021-10-13 22:50:40,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 681 places, 647 transitions, 28405 flow, removed 86 selfloop flow, removed 36 redundant places. [2021-10-13 22:50:40,021 INFO L242 Difference]: Finished difference. Result has 686 places, 610 transitions, 24017 flow [2021-10-13 22:50:40,021 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=23538, PETRI_DIFFERENCE_MINUEND_PLACES=655, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=24017, PETRI_PLACES=686, PETRI_TRANSITIONS=610} [2021-10-13 22:50:40,021 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 620 predicate places. [2021-10-13 22:50:40,021 INFO L470 AbstractCegarLoop]: Abstraction has has 686 places, 610 transitions, 24017 flow [2021-10-13 22:50:40,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.083333333333336) internal successors, (1298), 24 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:40,022 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:50:40,022 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:50:40,046 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 22:50:40,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable80 [2021-10-13 22:50:40,222 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:50:40,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:50:40,223 INFO L82 PathProgramCache]: Analyzing trace with hash 139187094, now seen corresponding path program 72 times [2021-10-13 22:50:40,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:50:40,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575788609] [2021-10-13 22:50:40,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:50:40,223 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:50:40,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:50:40,508 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:40,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:50:40,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575788609] [2021-10-13 22:50:40,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575788609] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:40,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678320338] [2021-10-13 22:50:40,509 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:50:40,509 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:40,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:50:40,509 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 22:50:40,510 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 22:50:42,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-10-13 22:50:42,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:50:42,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 22:50:42,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:50:43,401 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:43,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678320338] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:43,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:50:43,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-10-13 22:50:43,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888657700] [2021-10-13 22:50:43,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 22:50:43,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:50:43,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 22:50:43,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-10-13 22:50:43,402 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:50:43,403 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 686 places, 610 transitions, 24017 flow. Second operand has 25 states, 25 states have (on average 54.12) internal successors, (1353), 25 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:43,403 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:50:43,403 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:50:43,403 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:50:45,353 INFO L129 PetriNetUnfolder]: 532/4024 cut-off events. [2021-10-13 22:50:45,353 INFO L130 PetriNetUnfolder]: For 824709/825286 co-relation queries the response was YES. [2021-10-13 22:50:45,430 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40314 conditions, 4024 events. 532/4024 cut-off events. For 824709/825286 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 38735 event pairs, 0 based on Foata normal form. 79/3669 useless extension candidates. Maximal degree in co-relation 39990. Up to 774 conditions per place. [2021-10-13 22:50:45,554 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 495 selfloop transitions, 129 changer transitions 8/676 dead transitions. [2021-10-13 22:50:45,554 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 713 places, 676 transitions, 30606 flow [2021-10-13 22:50:45,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-13 22:50:45,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-13 22:50:45,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1716 transitions. [2021-10-13 22:50:45,556 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8387096774193549 [2021-10-13 22:50:45,556 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1716 transitions. [2021-10-13 22:50:45,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1716 transitions. [2021-10-13 22:50:45,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:50:45,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1716 transitions. [2021-10-13 22:50:45,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 55.354838709677416) internal successors, (1716), 31 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:45,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 66.0) internal successors, (2112), 32 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:45,559 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 66.0) internal successors, (2112), 32 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:45,559 INFO L186 Difference]: Start difference. First operand has 686 places, 610 transitions, 24017 flow. Second operand 31 states and 1716 transitions. [2021-10-13 22:50:45,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 713 places, 676 transitions, 30606 flow [2021-10-13 22:50:48,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 689 places, 676 transitions, 30190 flow, removed 142 selfloop flow, removed 24 redundant places. [2021-10-13 22:50:48,093 INFO L242 Difference]: Finished difference. Result has 709 places, 637 transitions, 25942 flow [2021-10-13 22:50:48,093 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=23709, PETRI_DIFFERENCE_MINUEND_PLACES=659, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=25942, PETRI_PLACES=709, PETRI_TRANSITIONS=637} [2021-10-13 22:50:48,093 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 643 predicate places. [2021-10-13 22:50:48,093 INFO L470 AbstractCegarLoop]: Abstraction has has 709 places, 637 transitions, 25942 flow [2021-10-13 22:50:48,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.12) internal successors, (1353), 25 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:48,094 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:50:48,094 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:50:48,118 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-10-13 22:50:48,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:48,294 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:50:48,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:50:48,295 INFO L82 PathProgramCache]: Analyzing trace with hash -265065786, now seen corresponding path program 73 times [2021-10-13 22:50:48,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:50:48,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519205656] [2021-10-13 22:50:48,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:50:48,295 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:50:48,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:50:48,525 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:48,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:50:48,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519205656] [2021-10-13 22:50:48,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519205656] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:48,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406986230] [2021-10-13 22:50:48,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:50:48,526 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:48,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:50:48,527 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:50:48,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-10-13 22:50:51,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:50:51,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 22:50:51,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:50:51,542 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:51,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406986230] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:51,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:50:51,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-10-13 22:50:51,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722762138] [2021-10-13 22:50:51,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 22:50:51,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:50:51,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 22:50:51,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-10-13 22:50:51,544 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:50:51,544 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 709 places, 637 transitions, 25942 flow. Second operand has 25 states, 25 states have (on average 54.12) internal successors, (1353), 25 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:51,544 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:50:51,544 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:50:51,544 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:50:53,652 INFO L129 PetriNetUnfolder]: 536/4053 cut-off events. [2021-10-13 22:50:53,652 INFO L130 PetriNetUnfolder]: For 859895/860527 co-relation queries the response was YES. [2021-10-13 22:50:53,750 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41176 conditions, 4053 events. 536/4053 cut-off events. For 859895/860527 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 39061 event pairs, 0 based on Foata normal form. 107/3723 useless extension candidates. Maximal degree in co-relation 40835. Up to 699 conditions per place. [2021-10-13 22:50:53,791 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 399 selfloop transitions, 230 changer transitions 8/681 dead transitions. [2021-10-13 22:50:53,791 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 738 places, 681 transitions, 31314 flow [2021-10-13 22:50:53,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-13 22:50:53,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-10-13 22:50:53,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1828 transitions. [2021-10-13 22:50:53,793 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8393021120293848 [2021-10-13 22:50:53,793 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1828 transitions. [2021-10-13 22:50:53,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1828 transitions. [2021-10-13 22:50:53,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:50:53,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1828 transitions. [2021-10-13 22:50:53,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 55.39393939393939) internal successors, (1828), 33 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:53,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 66.0) internal successors, (2244), 34 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:53,797 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 66.0) internal successors, (2244), 34 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:53,797 INFO L186 Difference]: Start difference. First operand has 709 places, 637 transitions, 25942 flow. Second operand 33 states and 1828 transitions. [2021-10-13 22:50:53,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 738 places, 681 transitions, 31314 flow [2021-10-13 22:50:56,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 725 places, 681 transitions, 30822 flow, removed 210 selfloop flow, removed 13 redundant places. [2021-10-13 22:50:56,546 INFO L242 Difference]: Finished difference. Result has 730 places, 641 transitions, 26361 flow [2021-10-13 22:50:56,546 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=25534, PETRI_DIFFERENCE_MINUEND_PLACES=693, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=26361, PETRI_PLACES=730, PETRI_TRANSITIONS=641} [2021-10-13 22:50:56,546 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 664 predicate places. [2021-10-13 22:50:56,547 INFO L470 AbstractCegarLoop]: Abstraction has has 730 places, 641 transitions, 26361 flow [2021-10-13 22:50:56,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.12) internal successors, (1353), 25 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:56,547 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:50:56,547 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:50:56,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-10-13 22:50:56,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:56,763 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:50:56,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:50:56,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1711244874, now seen corresponding path program 74 times [2021-10-13 22:50:56,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:50:56,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967913802] [2021-10-13 22:50:56,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:50:56,764 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:50:56,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:50:57,010 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:57,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:50:57,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967913802] [2021-10-13 22:50:57,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967913802] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:57,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25968346] [2021-10-13 22:50:57,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:50:57,011 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:50:57,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:50:57,012 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:50:57,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-10-13 22:50:59,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:50:59,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:50:59,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 22:50:59,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:50:59,945 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:50:59,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25968346] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:50:59,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:50:59,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-10-13 22:50:59,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707267146] [2021-10-13 22:50:59,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 22:50:59,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:50:59,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 22:50:59,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-10-13 22:50:59,947 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:50:59,947 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 730 places, 641 transitions, 26361 flow. Second operand has 24 states, 24 states have (on average 54.083333333333336) internal successors, (1298), 24 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:50:59,948 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:50:59,948 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:50:59,948 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:51:02,088 INFO L129 PetriNetUnfolder]: 540/4096 cut-off events. [2021-10-13 22:51:02,089 INFO L130 PetriNetUnfolder]: For 878549/879127 co-relation queries the response was YES. [2021-10-13 22:51:02,161 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41876 conditions, 4096 events. 540/4096 cut-off events. For 878549/879127 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 39540 event pairs, 0 based on Foata normal form. 108/3762 useless extension candidates. Maximal degree in co-relation 41533. Up to 703 conditions per place. [2021-10-13 22:51:02,192 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 363 selfloop transitions, 270 changer transitions 8/685 dead transitions. [2021-10-13 22:51:02,192 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 758 places, 685 transitions, 31897 flow [2021-10-13 22:51:02,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 22:51:02,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-10-13 22:51:02,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1773 transitions. [2021-10-13 22:51:02,194 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8394886363636364 [2021-10-13 22:51:02,194 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1773 transitions. [2021-10-13 22:51:02,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1773 transitions. [2021-10-13 22:51:02,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:51:02,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1773 transitions. [2021-10-13 22:51:02,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.40625) internal successors, (1773), 32 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:02,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 66.0) internal successors, (2178), 33 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:02,198 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 66.0) internal successors, (2178), 33 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:02,198 INFO L186 Difference]: Start difference. First operand has 730 places, 641 transitions, 26361 flow. Second operand 32 states and 1773 transitions. [2021-10-13 22:51:02,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 758 places, 685 transitions, 31897 flow [2021-10-13 22:51:05,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 729 places, 685 transitions, 31095 flow, removed 196 selfloop flow, removed 29 redundant places. [2021-10-13 22:51:05,619 INFO L242 Difference]: Finished difference. Result has 734 places, 645 transitions, 26670 flow [2021-10-13 22:51:05,620 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=25761, PETRI_DIFFERENCE_MINUEND_PLACES=698, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=26670, PETRI_PLACES=734, PETRI_TRANSITIONS=645} [2021-10-13 22:51:05,620 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 668 predicate places. [2021-10-13 22:51:05,620 INFO L470 AbstractCegarLoop]: Abstraction has has 734 places, 645 transitions, 26670 flow [2021-10-13 22:51:05,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.083333333333336) internal successors, (1298), 24 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:05,620 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:51:05,620 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:51:05,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-10-13 22:51:05,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:51:05,821 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:51:05,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:51:05,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1379909374, now seen corresponding path program 75 times [2021-10-13 22:51:05,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:51:05,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719473096] [2021-10-13 22:51:05,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:51:05,822 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:51:05,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:51:06,082 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:06,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:51:06,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719473096] [2021-10-13 22:51:06,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719473096] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:06,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142210454] [2021-10-13 22:51:06,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:51:06,082 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:51:06,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:51:06,084 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:51:06,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-10-13 22:51:08,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-10-13 22:51:08,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:51:08,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-13 22:51:08,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:51:09,070 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:09,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142210454] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:09,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:51:09,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-10-13 22:51:09,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484011091] [2021-10-13 22:51:09,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 22:51:09,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:51:09,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 22:51:09,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-10-13 22:51:09,071 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:51:09,072 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 734 places, 645 transitions, 26670 flow. Second operand has 24 states, 24 states have (on average 54.083333333333336) internal successors, (1298), 24 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:09,072 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:51:09,072 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:51:09,072 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:51:11,229 INFO L129 PetriNetUnfolder]: 544/4125 cut-off events. [2021-10-13 22:51:11,229 INFO L130 PetriNetUnfolder]: For 853177/853805 co-relation queries the response was YES. [2021-10-13 22:51:11,314 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41787 conditions, 4125 events. 544/4125 cut-off events. For 853177/853805 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 39725 event pairs, 0 based on Foata normal form. 116/3798 useless extension candidates. Maximal degree in co-relation 41442. Up to 709 conditions per place. [2021-10-13 22:51:11,345 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 317 selfloop transitions, 321 changer transitions 8/690 dead transitions. [2021-10-13 22:51:11,346 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 764 places, 690 transitions, 32394 flow [2021-10-13 22:51:11,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-13 22:51:11,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-10-13 22:51:11,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1885 transitions. [2021-10-13 22:51:11,347 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8400178253119429 [2021-10-13 22:51:11,347 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1885 transitions. [2021-10-13 22:51:11,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1885 transitions. [2021-10-13 22:51:11,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:51:11,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1885 transitions. [2021-10-13 22:51:11,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 55.44117647058823) internal successors, (1885), 34 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:11,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 66.0) internal successors, (2310), 35 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:11,350 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 66.0) internal successors, (2310), 35 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:11,350 INFO L186 Difference]: Start difference. First operand has 734 places, 645 transitions, 26670 flow. Second operand 34 states and 1885 transitions. [2021-10-13 22:51:11,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 764 places, 690 transitions, 32394 flow [2021-10-13 22:51:14,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 736 places, 690 transitions, 31606 flow, removed 156 selfloop flow, removed 28 redundant places. [2021-10-13 22:51:14,615 INFO L242 Difference]: Finished difference. Result has 741 places, 649 transitions, 27037 flow [2021-10-13 22:51:14,616 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=26018, PETRI_DIFFERENCE_MINUEND_PLACES=703, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=317, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=27037, PETRI_PLACES=741, PETRI_TRANSITIONS=649} [2021-10-13 22:51:14,616 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 675 predicate places. [2021-10-13 22:51:14,616 INFO L470 AbstractCegarLoop]: Abstraction has has 741 places, 649 transitions, 27037 flow [2021-10-13 22:51:14,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.083333333333336) internal successors, (1298), 24 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:14,616 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:51:14,616 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:51:14,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-10-13 22:51:14,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-10-13 22:51:14,817 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:51:14,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:51:14,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1862582212, now seen corresponding path program 76 times [2021-10-13 22:51:14,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:51:14,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953513986] [2021-10-13 22:51:14,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:51:14,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:51:14,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:51:15,073 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:15,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:51:15,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953513986] [2021-10-13 22:51:15,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953513986] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:15,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922004258] [2021-10-13 22:51:15,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:51:15,073 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:51:15,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:51:15,074 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:51:15,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-10-13 22:51:17,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:51:17,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:51:17,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 22:51:17,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:51:18,009 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:18,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922004258] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:18,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:51:18,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-10-13 22:51:18,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568631234] [2021-10-13 22:51:18,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 22:51:18,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:51:18,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 22:51:18,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-10-13 22:51:18,012 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:51:18,012 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 741 places, 649 transitions, 27037 flow. Second operand has 25 states, 25 states have (on average 54.12) internal successors, (1353), 25 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:18,012 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:51:18,012 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:51:18,012 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:51:20,286 INFO L129 PetriNetUnfolder]: 548/4168 cut-off events. [2021-10-13 22:51:20,286 INFO L130 PetriNetUnfolder]: For 859549/860127 co-relation queries the response was YES. [2021-10-13 22:51:20,436 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42213 conditions, 4168 events. 548/4168 cut-off events. For 859549/860127 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 40290 event pairs, 0 based on Foata normal form. 155/3875 useless extension candidates. Maximal degree in co-relation 41866. Up to 715 conditions per place. [2021-10-13 22:51:20,464 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 217 selfloop transitions, 427 changer transitions 8/696 dead transitions. [2021-10-13 22:51:20,464 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 776 places, 696 transitions, 33160 flow [2021-10-13 22:51:20,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-13 22:51:20,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-10-13 22:51:20,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2164 transitions. [2021-10-13 22:51:20,466 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8407148407148407 [2021-10-13 22:51:20,466 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2164 transitions. [2021-10-13 22:51:20,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2164 transitions. [2021-10-13 22:51:20,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:51:20,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2164 transitions. [2021-10-13 22:51:20,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 55.48717948717949) internal successors, (2164), 39 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:20,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 66.0) internal successors, (2640), 40 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:20,469 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 66.0) internal successors, (2640), 40 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:20,469 INFO L186 Difference]: Start difference. First operand has 741 places, 649 transitions, 27037 flow. Second operand 39 states and 2164 transitions. [2021-10-13 22:51:20,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 776 places, 696 transitions, 33160 flow [2021-10-13 22:51:23,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 745 places, 696 transitions, 32236 flow, removed 162 selfloop flow, removed 31 redundant places. [2021-10-13 22:51:23,746 INFO L242 Difference]: Finished difference. Result has 750 places, 653 transitions, 27501 flow [2021-10-13 22:51:23,747 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=26261, PETRI_DIFFERENCE_MINUEND_PLACES=707, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=423, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=27501, PETRI_PLACES=750, PETRI_TRANSITIONS=653} [2021-10-13 22:51:23,747 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 684 predicate places. [2021-10-13 22:51:23,747 INFO L470 AbstractCegarLoop]: Abstraction has has 750 places, 653 transitions, 27501 flow [2021-10-13 22:51:23,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.12) internal successors, (1353), 25 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:23,747 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:51:23,747 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:51:23,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-10-13 22:51:23,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-10-13 22:51:23,948 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:51:23,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:51:23,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1328141436, now seen corresponding path program 77 times [2021-10-13 22:51:23,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:51:23,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610257377] [2021-10-13 22:51:23,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:51:23,948 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:51:23,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:51:24,144 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:24,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:51:24,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610257377] [2021-10-13 22:51:24,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610257377] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:24,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3969100] [2021-10-13 22:51:24,144 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:51:24,144 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:51:24,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:51:24,145 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:51:24,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-10-13 22:51:26,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-10-13 22:51:26,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:51:26,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 22:51:26,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:51:27,254 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:27,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3969100] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:27,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:51:27,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-10-13 22:51:27,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319308009] [2021-10-13 22:51:27,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 22:51:27,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:51:27,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 22:51:27,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-10-13 22:51:27,255 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:51:27,256 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 750 places, 653 transitions, 27501 flow. Second operand has 25 states, 25 states have (on average 54.12) internal successors, (1353), 25 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:27,256 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:51:27,256 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:51:27,256 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:51:29,705 INFO L129 PetriNetUnfolder]: 555/4231 cut-off events. [2021-10-13 22:51:29,705 INFO L130 PetriNetUnfolder]: For 874148/874764 co-relation queries the response was YES. [2021-10-13 22:51:29,785 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42982 conditions, 4231 events. 555/4231 cut-off events. For 874148/874764 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 41030 event pairs, 0 based on Foata normal form. 191/3968 useless extension candidates. Maximal degree in co-relation 42633. Up to 727 conditions per place. [2021-10-13 22:51:29,813 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 138 selfloop transitions, 518 changer transitions 8/708 dead transitions. [2021-10-13 22:51:29,814 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 789 places, 708 transitions, 34444 flow [2021-10-13 22:51:29,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-13 22:51:29,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-10-13 22:51:29,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2388 transitions. [2021-10-13 22:51:29,815 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8414376321353065 [2021-10-13 22:51:29,815 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2388 transitions. [2021-10-13 22:51:29,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2388 transitions. [2021-10-13 22:51:29,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:51:29,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2388 transitions. [2021-10-13 22:51:29,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 55.53488372093023) internal successors, (2388), 43 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:29,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 66.0) internal successors, (2904), 44 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:29,819 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 66.0) internal successors, (2904), 44 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:29,819 INFO L186 Difference]: Start difference. First operand has 750 places, 653 transitions, 27501 flow. Second operand 43 states and 2388 transitions. [2021-10-13 22:51:29,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 789 places, 708 transitions, 34444 flow [2021-10-13 22:51:33,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 752 places, 708 transitions, 33285 flow, removed 172 selfloop flow, removed 37 redundant places. [2021-10-13 22:51:33,187 INFO L242 Difference]: Finished difference. Result has 760 places, 661 transitions, 28340 flow [2021-10-13 22:51:33,187 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=26510, PETRI_DIFFERENCE_MINUEND_PLACES=710, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=510, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=28340, PETRI_PLACES=760, PETRI_TRANSITIONS=661} [2021-10-13 22:51:33,188 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 694 predicate places. [2021-10-13 22:51:33,188 INFO L470 AbstractCegarLoop]: Abstraction has has 760 places, 661 transitions, 28340 flow [2021-10-13 22:51:33,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.12) internal successors, (1353), 25 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:33,188 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:51:33,188 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:51:33,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-10-13 22:51:33,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-10-13 22:51:33,388 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:51:33,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:51:33,389 INFO L82 PathProgramCache]: Analyzing trace with hash -811472112, now seen corresponding path program 78 times [2021-10-13 22:51:33,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:51:33,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222722535] [2021-10-13 22:51:33,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:51:33,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:51:33,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:51:33,567 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:33,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:51:33,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222722535] [2021-10-13 22:51:33,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222722535] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:33,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803680343] [2021-10-13 22:51:33,568 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:51:33,568 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:51:33,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:51:33,569 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:51:33,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-10-13 22:51:36,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-10-13 22:51:36,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:51:36,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 22:51:36,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:51:36,741 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:36,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803680343] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:36,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:51:36,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-10-13 22:51:36,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856604519] [2021-10-13 22:51:36,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 22:51:36,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:51:36,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 22:51:36,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-10-13 22:51:36,742 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:51:36,743 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 760 places, 661 transitions, 28340 flow. Second operand has 25 states, 25 states have (on average 54.12) internal successors, (1353), 25 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:36,743 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:51:36,743 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:51:36,743 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:51:39,400 INFO L129 PetriNetUnfolder]: 561/4278 cut-off events. [2021-10-13 22:51:39,400 INFO L130 PetriNetUnfolder]: For 906426/907069 co-relation queries the response was YES. [2021-10-13 22:51:39,480 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43952 conditions, 4278 events. 561/4278 cut-off events. For 906426/907069 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 41434 event pairs, 0 based on Foata normal form. 202/4023 useless extension candidates. Maximal degree in co-relation 43598. Up to 737 conditions per place. [2021-10-13 22:51:39,507 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 116 selfloop transitions, 549 changer transitions 8/717 dead transitions. [2021-10-13 22:51:39,507 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 799 places, 717 transitions, 35583 flow [2021-10-13 22:51:39,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-13 22:51:39,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-10-13 22:51:39,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2389 transitions. [2021-10-13 22:51:39,509 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8417899929527837 [2021-10-13 22:51:39,509 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2389 transitions. [2021-10-13 22:51:39,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2389 transitions. [2021-10-13 22:51:39,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:51:39,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2389 transitions. [2021-10-13 22:51:39,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 55.55813953488372) internal successors, (2389), 43 states have internal predecessors, (2389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:39,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 66.0) internal successors, (2904), 44 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:39,512 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 66.0) internal successors, (2904), 44 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:39,512 INFO L186 Difference]: Start difference. First operand has 760 places, 661 transitions, 28340 flow. Second operand 43 states and 2389 transitions. [2021-10-13 22:51:39,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 799 places, 717 transitions, 35583 flow [2021-10-13 22:51:42,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 761 places, 717 transitions, 34184 flow, removed 230 selfloop flow, removed 38 redundant places. [2021-10-13 22:51:42,727 INFO L242 Difference]: Finished difference. Result has 767 places, 668 transitions, 28848 flow [2021-10-13 22:51:42,727 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=27063, PETRI_DIFFERENCE_MINUEND_PLACES=719, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=542, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=28848, PETRI_PLACES=767, PETRI_TRANSITIONS=668} [2021-10-13 22:51:42,727 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 701 predicate places. [2021-10-13 22:51:42,727 INFO L470 AbstractCegarLoop]: Abstraction has has 767 places, 668 transitions, 28848 flow [2021-10-13 22:51:42,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.12) internal successors, (1353), 25 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:42,728 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:51:42,728 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:51:42,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-10-13 22:51:42,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-10-13 22:51:42,928 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:51:42,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:51:42,929 INFO L82 PathProgramCache]: Analyzing trace with hash -309297584, now seen corresponding path program 79 times [2021-10-13 22:51:42,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:51:42,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253898755] [2021-10-13 22:51:42,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:51:42,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:51:42,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:51:43,118 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:43,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:51:43,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253898755] [2021-10-13 22:51:43,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253898755] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:43,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464074586] [2021-10-13 22:51:43,118 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:51:43,118 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:51:43,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:51:43,119 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:51:43,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-10-13 22:51:45,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:51:45,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 22:51:45,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:51:46,048 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:46,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464074586] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:46,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:51:46,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-10-13 22:51:46,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118253774] [2021-10-13 22:51:46,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 22:51:46,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:51:46,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 22:51:46,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-10-13 22:51:46,050 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:51:46,051 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 767 places, 668 transitions, 28848 flow. Second operand has 24 states, 24 states have (on average 54.083333333333336) internal successors, (1298), 24 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:46,051 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:51:46,051 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:51:46,051 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:51:48,446 INFO L129 PetriNetUnfolder]: 578/4357 cut-off events. [2021-10-13 22:51:48,447 INFO L130 PetriNetUnfolder]: For 978305/978991 co-relation queries the response was YES. [2021-10-13 22:51:48,528 INFO L84 FinitePrefix]: Finished finitePrefix Result has 46031 conditions, 4357 events. 578/4357 cut-off events. For 978305/978991 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 42215 event pairs, 0 based on Foata normal form. 214/4107 useless extension candidates. Maximal degree in co-relation 45674. Up to 757 conditions per place. [2021-10-13 22:51:48,558 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 120 selfloop transitions, 558 changer transitions 8/730 dead transitions. [2021-10-13 22:51:48,558 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 807 places, 730 transitions, 36685 flow [2021-10-13 22:51:48,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-13 22:51:48,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-10-13 22:51:48,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2449 transitions. [2021-10-13 22:51:48,560 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8433195592286501 [2021-10-13 22:51:48,560 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2449 transitions. [2021-10-13 22:51:48,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2449 transitions. [2021-10-13 22:51:48,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:51:48,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2449 transitions. [2021-10-13 22:51:48,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 55.65909090909091) internal successors, (2449), 44 states have internal predecessors, (2449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:48,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 66.0) internal successors, (2970), 45 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:48,563 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 66.0) internal successors, (2970), 45 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:48,563 INFO L186 Difference]: Start difference. First operand has 767 places, 668 transitions, 28848 flow. Second operand 44 states and 2449 transitions. [2021-10-13 22:51:48,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 807 places, 730 transitions, 36685 flow [2021-10-13 22:51:51,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 769 places, 730 transitions, 35064 flow, removed 309 selfloop flow, removed 38 redundant places. [2021-10-13 22:51:51,852 INFO L242 Difference]: Finished difference. Result has 776 places, 677 transitions, 29454 flow [2021-10-13 22:51:51,852 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=27437, PETRI_DIFFERENCE_MINUEND_PLACES=726, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=549, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=29454, PETRI_PLACES=776, PETRI_TRANSITIONS=677} [2021-10-13 22:51:51,852 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 710 predicate places. [2021-10-13 22:51:51,852 INFO L470 AbstractCegarLoop]: Abstraction has has 776 places, 677 transitions, 29454 flow [2021-10-13 22:51:51,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.083333333333336) internal successors, (1298), 24 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:51,853 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:51:51,853 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:51:51,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-10-13 22:51:52,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:51:52,053 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:51:52,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:51:52,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1762137814, now seen corresponding path program 80 times [2021-10-13 22:51:52,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:51:52,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158825895] [2021-10-13 22:51:52,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:51:52,054 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:51:52,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:51:52,297 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:52,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:51:52,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158825895] [2021-10-13 22:51:52,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158825895] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:52,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333656403] [2021-10-13 22:51:52,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:51:52,298 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:51:52,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:51:52,302 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:51:52,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-10-13 22:51:55,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:51:55,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:51:55,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 22:51:55,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:51:55,381 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:51:55,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333656403] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:51:55,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:51:55,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-10-13 22:51:55,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897303251] [2021-10-13 22:51:55,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 22:51:55,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:51:55,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 22:51:55,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-10-13 22:51:55,383 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:51:55,383 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 776 places, 677 transitions, 29454 flow. Second operand has 25 states, 25 states have (on average 54.08) internal successors, (1352), 25 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:55,383 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:51:55,383 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:51:55,383 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:51:58,132 INFO L129 PetriNetUnfolder]: 579/4373 cut-off events. [2021-10-13 22:51:58,132 INFO L130 PetriNetUnfolder]: For 1024671/1025359 co-relation queries the response was YES. [2021-10-13 22:51:58,214 INFO L84 FinitePrefix]: Finished finitePrefix Result has 46877 conditions, 4373 events. 579/4373 cut-off events. For 1024671/1025359 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 42482 event pairs, 0 based on Foata normal form. 225/4133 useless extension candidates. Maximal degree in co-relation 46516. Up to 757 conditions per place. [2021-10-13 22:51:58,244 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 118 selfloop transitions, 564 changer transitions 17/743 dead transitions. [2021-10-13 22:51:58,244 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 820 places, 743 transitions, 38657 flow [2021-10-13 22:51:58,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-10-13 22:51:58,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-10-13 22:51:58,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2670 transitions. [2021-10-13 22:51:58,246 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8428030303030303 [2021-10-13 22:51:58,246 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2670 transitions. [2021-10-13 22:51:58,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2670 transitions. [2021-10-13 22:51:58,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:51:58,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2670 transitions. [2021-10-13 22:51:58,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 55.625) internal successors, (2670), 48 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:58,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 66.0) internal successors, (3234), 49 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:58,250 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 66.0) internal successors, (3234), 49 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:51:58,250 INFO L186 Difference]: Start difference. First operand has 776 places, 677 transitions, 29454 flow. Second operand 48 states and 2670 transitions. [2021-10-13 22:51:58,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 820 places, 743 transitions, 38657 flow [2021-10-13 22:52:02,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 781 places, 743 transitions, 36720 flow, removed 462 selfloop flow, removed 39 redundant places. [2021-10-13 22:52:02,108 INFO L242 Difference]: Finished difference. Result has 791 places, 684 transitions, 30088 flow [2021-10-13 22:52:02,109 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=27989, PETRI_DIFFERENCE_MINUEND_PLACES=734, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=557, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=30088, PETRI_PLACES=791, PETRI_TRANSITIONS=684} [2021-10-13 22:52:02,109 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 725 predicate places. [2021-10-13 22:52:02,109 INFO L470 AbstractCegarLoop]: Abstraction has has 791 places, 684 transitions, 30088 flow [2021-10-13 22:52:02,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.08) internal successors, (1352), 25 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:02,109 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:52:02,109 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:52:02,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-10-13 22:52:02,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:52:02,310 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:52:02,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:52:02,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1141433096, now seen corresponding path program 81 times [2021-10-13 22:52:02,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:52:02,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8175988] [2021-10-13 22:52:02,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:52:02,310 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:52:02,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:52:02,494 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 22:52:02,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:52:02,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8175988] [2021-10-13 22:52:02,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8175988] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:52:02,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725870606] [2021-10-13 22:52:02,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:52:02,495 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:52:02,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:52:02,497 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:52:02,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-10-13 22:52:05,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-10-13 22:52:05,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:52:05,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 22:52:05,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:52:05,505 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 22:52:05,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725870606] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:52:05,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:52:05,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-10-13 22:52:05,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262730224] [2021-10-13 22:52:05,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 22:52:05,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:52:05,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 22:52:05,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-10-13 22:52:05,507 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:52:05,508 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 791 places, 684 transitions, 30088 flow. Second operand has 24 states, 24 states have (on average 54.125) internal successors, (1299), 24 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:05,508 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:52:05,508 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:52:05,508 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:52:08,189 INFO L129 PetriNetUnfolder]: 600/4569 cut-off events. [2021-10-13 22:52:08,189 INFO L130 PetriNetUnfolder]: For 1151856/1152566 co-relation queries the response was YES. [2021-10-13 22:52:08,276 INFO L84 FinitePrefix]: Finished finitePrefix Result has 50059 conditions, 4569 events. 600/4569 cut-off events. For 1151856/1152566 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 44738 event pairs, 0 based on Foata normal form. 221/4302 useless extension candidates. Maximal degree in co-relation 49691. Up to 795 conditions per place. [2021-10-13 22:52:08,399 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 175 selfloop transitions, 531 changer transitions 5/755 dead transitions. [2021-10-13 22:52:08,400 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 828 places, 755 transitions, 38903 flow [2021-10-13 22:52:08,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-13 22:52:08,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-10-13 22:52:08,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2389 transitions. [2021-10-13 22:52:08,401 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8417899929527837 [2021-10-13 22:52:08,401 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2389 transitions. [2021-10-13 22:52:08,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2389 transitions. [2021-10-13 22:52:08,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:52:08,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2389 transitions. [2021-10-13 22:52:08,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 55.55813953488372) internal successors, (2389), 43 states have internal predecessors, (2389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:08,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 66.0) internal successors, (2904), 44 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:08,404 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 66.0) internal successors, (2904), 44 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:08,404 INFO L186 Difference]: Start difference. First operand has 791 places, 684 transitions, 30088 flow. Second operand 43 states and 2389 transitions. [2021-10-13 22:52:08,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 828 places, 755 transitions, 38903 flow [2021-10-13 22:52:12,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 784 places, 755 transitions, 36036 flow, removed 876 selfloop flow, removed 44 redundant places. [2021-10-13 22:52:12,267 INFO L242 Difference]: Finished difference. Result has 790 places, 713 transitions, 31258 flow [2021-10-13 22:52:12,268 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=28174, PETRI_DIFFERENCE_MINUEND_PLACES=742, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=502, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=31258, PETRI_PLACES=790, PETRI_TRANSITIONS=713} [2021-10-13 22:52:12,268 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 724 predicate places. [2021-10-13 22:52:12,268 INFO L470 AbstractCegarLoop]: Abstraction has has 790 places, 713 transitions, 31258 flow [2021-10-13 22:52:12,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.125) internal successors, (1299), 24 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:12,268 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:52:12,268 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:52:12,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-10-13 22:52:12,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:52:12,469 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:52:12,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:52:12,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1521195325, now seen corresponding path program 82 times [2021-10-13 22:52:12,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:52:12,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140378404] [2021-10-13 22:52:12,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:52:12,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:52:12,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:52:12,719 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:52:12,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:52:12,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140378404] [2021-10-13 22:52:12,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140378404] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:52:12,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511884610] [2021-10-13 22:52:12,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:52:12,719 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:52:12,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:52:12,720 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:52:12,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-10-13 22:52:15,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:52:15,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:52:15,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 22:52:15,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:52:16,164 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:52:16,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511884610] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:52:16,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:52:16,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-10-13 22:52:16,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431869387] [2021-10-13 22:52:16,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 22:52:16,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:52:16,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 22:52:16,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2021-10-13 22:52:16,166 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:52:16,166 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 790 places, 713 transitions, 31258 flow. Second operand has 24 states, 24 states have (on average 54.041666666666664) internal successors, (1297), 24 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:16,166 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:52:16,166 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:52:16,166 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:52:18,458 INFO L129 PetriNetUnfolder]: 604/4590 cut-off events. [2021-10-13 22:52:18,458 INFO L130 PetriNetUnfolder]: For 1128716/1129409 co-relation queries the response was YES. [2021-10-13 22:52:18,645 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49605 conditions, 4590 events. 604/4590 cut-off events. For 1128716/1129409 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 44888 event pairs, 0 based on Foata normal form. 81/4179 useless extension candidates. Maximal degree in co-relation 49236. Up to 1083 conditions per place. [2021-10-13 22:52:18,678 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 659 selfloop transitions, 35 changer transitions 8/746 dead transitions. [2021-10-13 22:52:18,678 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 814 places, 746 transitions, 36401 flow [2021-10-13 22:52:18,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-13 22:52:18,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-10-13 22:52:18,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1495 transitions. [2021-10-13 22:52:18,680 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8389450056116723 [2021-10-13 22:52:18,680 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1495 transitions. [2021-10-13 22:52:18,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1495 transitions. [2021-10-13 22:52:18,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:52:18,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1495 transitions. [2021-10-13 22:52:18,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 55.370370370370374) internal successors, (1495), 27 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:18,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 66.0) internal successors, (1848), 28 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:18,682 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 66.0) internal successors, (1848), 28 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:18,682 INFO L186 Difference]: Start difference. First operand has 790 places, 713 transitions, 31258 flow. Second operand 27 states and 1495 transitions. [2021-10-13 22:52:18,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 814 places, 746 transitions, 36401 flow [2021-10-13 22:52:22,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 778 places, 746 transitions, 35301 flow, removed 169 selfloop flow, removed 36 redundant places. [2021-10-13 22:52:22,773 INFO L242 Difference]: Finished difference. Result has 783 places, 715 transitions, 30627 flow [2021-10-13 22:52:22,773 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=30258, PETRI_DIFFERENCE_MINUEND_PLACES=752, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=678, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=30627, PETRI_PLACES=783, PETRI_TRANSITIONS=715} [2021-10-13 22:52:22,773 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 717 predicate places. [2021-10-13 22:52:22,773 INFO L470 AbstractCegarLoop]: Abstraction has has 783 places, 715 transitions, 30627 flow [2021-10-13 22:52:22,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.041666666666664) internal successors, (1297), 24 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:22,774 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:52:22,774 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:52:22,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-10-13 22:52:22,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:52:22,974 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:52:22,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:52:22,975 INFO L82 PathProgramCache]: Analyzing trace with hash -32073403, now seen corresponding path program 83 times [2021-10-13 22:52:22,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:52:22,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741126979] [2021-10-13 22:52:22,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:52:22,975 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:52:22,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:52:23,214 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:52:23,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:52:23,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741126979] [2021-10-13 22:52:23,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741126979] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:52:23,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576445532] [2021-10-13 22:52:23,214 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:52:23,215 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:52:23,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:52:23,215 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:52:23,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-10-13 22:52:26,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-10-13 22:52:26,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:52:26,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 22:52:26,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:52:26,609 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:52:26,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576445532] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:52:26,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:52:26,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-10-13 22:52:26,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450514604] [2021-10-13 22:52:26,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 22:52:26,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:52:26,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 22:52:26,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-10-13 22:52:26,610 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:52:26,611 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 783 places, 715 transitions, 30627 flow. Second operand has 24 states, 24 states have (on average 54.041666666666664) internal successors, (1297), 24 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:26,611 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:52:26,611 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:52:26,611 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:52:29,011 INFO L129 PetriNetUnfolder]: 610/4644 cut-off events. [2021-10-13 22:52:29,011 INFO L130 PetriNetUnfolder]: For 1148926/1149574 co-relation queries the response was YES. [2021-10-13 22:52:29,117 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49967 conditions, 4644 events. 610/4644 cut-off events. For 1148926/1149574 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 45370 event pairs, 0 based on Foata normal form. 87/4232 useless extension candidates. Maximal degree in co-relation 49596. Up to 990 conditions per place. [2021-10-13 22:52:29,243 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 610 selfloop transitions, 90 changer transitions 8/752 dead transitions. [2021-10-13 22:52:29,243 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 810 places, 752 transitions, 36193 flow [2021-10-13 22:52:29,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-13 22:52:29,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-13 22:52:29,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1718 transitions. [2021-10-13 22:52:29,244 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8396871945259042 [2021-10-13 22:52:29,244 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1718 transitions. [2021-10-13 22:52:29,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1718 transitions. [2021-10-13 22:52:29,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:52:29,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1718 transitions. [2021-10-13 22:52:29,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 55.41935483870968) internal successors, (1718), 31 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:29,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 66.0) internal successors, (2112), 32 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:29,247 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 66.0) internal successors, (2112), 32 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:29,247 INFO L186 Difference]: Start difference. First operand has 783 places, 715 transitions, 30627 flow. Second operand 31 states and 1718 transitions. [2021-10-13 22:52:29,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 810 places, 752 transitions, 36193 flow [2021-10-13 22:52:34,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 789 places, 752 transitions, 35863 flow, removed 138 selfloop flow, removed 21 redundant places. [2021-10-13 22:52:34,902 INFO L242 Difference]: Finished difference. Result has 796 places, 721 transitions, 31153 flow [2021-10-13 22:52:34,903 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=30371, PETRI_DIFFERENCE_MINUEND_PLACES=759, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=31153, PETRI_PLACES=796, PETRI_TRANSITIONS=721} [2021-10-13 22:52:34,903 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 730 predicate places. [2021-10-13 22:52:34,903 INFO L470 AbstractCegarLoop]: Abstraction has has 796 places, 721 transitions, 31153 flow [2021-10-13 22:52:34,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.041666666666664) internal successors, (1297), 24 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:34,903 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:52:34,903 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:52:34,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-10-13 22:52:35,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:52:35,104 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:52:35,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:52:35,104 INFO L82 PathProgramCache]: Analyzing trace with hash 504738287, now seen corresponding path program 84 times [2021-10-13 22:52:35,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:52:35,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054625707] [2021-10-13 22:52:35,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:52:35,105 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:52:35,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:52:35,324 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:52:35,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:52:35,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054625707] [2021-10-13 22:52:35,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054625707] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:52:35,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69842319] [2021-10-13 22:52:35,324 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:52:35,324 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:52:35,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:52:35,325 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:52:35,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-10-13 22:52:38,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-10-13 22:52:38,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:52:38,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 22:52:38,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:52:38,626 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:52:38,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69842319] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:52:38,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:52:38,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-10-13 22:52:38,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943217258] [2021-10-13 22:52:38,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 22:52:38,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:52:38,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 22:52:38,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-10-13 22:52:38,628 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:52:38,629 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 796 places, 721 transitions, 31153 flow. Second operand has 25 states, 25 states have (on average 54.08) internal successors, (1352), 25 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:38,629 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:52:38,629 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:52:38,629 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:52:41,095 INFO L129 PetriNetUnfolder]: 629/4815 cut-off events. [2021-10-13 22:52:41,096 INFO L130 PetriNetUnfolder]: For 1215898/1216546 co-relation queries the response was YES. [2021-10-13 22:52:41,237 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52200 conditions, 4815 events. 629/4815 cut-off events. For 1215898/1216546 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 47517 event pairs, 0 based on Foata normal form. 143/4442 useless extension candidates. Maximal degree in co-relation 51825. Up to 835 conditions per place. [2021-10-13 22:52:41,273 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 341 selfloop transitions, 385 changer transitions 8/778 dead transitions. [2021-10-13 22:52:41,273 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 831 places, 778 transitions, 38401 flow [2021-10-13 22:52:41,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-13 22:52:41,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-10-13 22:52:41,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2163 transitions. [2021-10-13 22:52:41,274 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8403263403263403 [2021-10-13 22:52:41,274 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2163 transitions. [2021-10-13 22:52:41,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2163 transitions. [2021-10-13 22:52:41,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:52:41,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2163 transitions. [2021-10-13 22:52:41,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 55.46153846153846) internal successors, (2163), 39 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:41,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 66.0) internal successors, (2640), 40 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:41,277 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 66.0) internal successors, (2640), 40 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:41,277 INFO L186 Difference]: Start difference. First operand has 796 places, 721 transitions, 31153 flow. Second operand 39 states and 2163 transitions. [2021-10-13 22:52:41,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 831 places, 778 transitions, 38401 flow [2021-10-13 22:52:47,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 806 places, 778 transitions, 37950 flow, removed 158 selfloop flow, removed 25 redundant places. [2021-10-13 22:52:47,591 INFO L242 Difference]: Finished difference. Result has 820 places, 741 transitions, 33470 flow [2021-10-13 22:52:47,592 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=30834, PETRI_DIFFERENCE_MINUEND_PLACES=768, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=721, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=365, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=33470, PETRI_PLACES=820, PETRI_TRANSITIONS=741} [2021-10-13 22:52:47,592 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 754 predicate places. [2021-10-13 22:52:47,592 INFO L470 AbstractCegarLoop]: Abstraction has has 820 places, 741 transitions, 33470 flow [2021-10-13 22:52:47,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.08) internal successors, (1352), 25 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:47,592 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:52:47,592 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:52:47,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-10-13 22:52:47,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-10-13 22:52:47,793 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:52:47,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:52:47,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1055717709, now seen corresponding path program 85 times [2021-10-13 22:52:47,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:52:47,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255475238] [2021-10-13 22:52:47,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:52:47,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:52:47,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:52:48,038 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:52:48,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:52:48,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255475238] [2021-10-13 22:52:48,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255475238] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:52:48,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125646520] [2021-10-13 22:52:48,039 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:52:48,039 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:52:48,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:52:48,040 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:52:48,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-10-13 22:52:51,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:52:51,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 22:52:51,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:52:51,579 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:52:51,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125646520] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:52:51,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:52:51,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-10-13 22:52:51,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242604714] [2021-10-13 22:52:51,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 22:52:51,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:52:51,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 22:52:51,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-10-13 22:52:51,580 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:52:51,581 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 820 places, 741 transitions, 33470 flow. Second operand has 24 states, 24 states have (on average 54.041666666666664) internal successors, (1297), 24 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:51,581 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:52:51,581 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:52:51,581 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:52:54,272 INFO L129 PetriNetUnfolder]: 635/4869 cut-off events. [2021-10-13 22:52:54,273 INFO L130 PetriNetUnfolder]: For 1258242/1258902 co-relation queries the response was YES. [2021-10-13 22:52:54,371 INFO L84 FinitePrefix]: Finished finitePrefix Result has 53613 conditions, 4869 events. 635/4869 cut-off events. For 1258242/1258902 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 48205 event pairs, 0 based on Foata normal form. 155/4502 useless extension candidates. Maximal degree in co-relation 53226. Up to 845 conditions per place. [2021-10-13 22:52:54,479 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 309 selfloop transitions, 425 changer transitions 8/786 dead transitions. [2021-10-13 22:52:54,479 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 856 places, 786 transitions, 40012 flow [2021-10-13 22:52:54,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-13 22:52:54,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-10-13 22:52:54,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2219 transitions. [2021-10-13 22:52:54,481 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8405303030303031 [2021-10-13 22:52:54,481 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2219 transitions. [2021-10-13 22:52:54,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2219 transitions. [2021-10-13 22:52:54,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:52:54,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2219 transitions. [2021-10-13 22:52:54,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 55.475) internal successors, (2219), 40 states have internal predecessors, (2219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:54,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 66.0) internal successors, (2706), 41 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:54,484 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 66.0) internal successors, (2706), 41 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:54,484 INFO L186 Difference]: Start difference. First operand has 820 places, 741 transitions, 33470 flow. Second operand 40 states and 2219 transitions. [2021-10-13 22:52:54,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 856 places, 786 transitions, 40012 flow [2021-10-13 22:52:59,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 826 places, 786 transitions, 39171 flow, removed 224 selfloop flow, removed 30 redundant places. [2021-10-13 22:52:59,132 INFO L242 Difference]: Finished difference. Result has 833 places, 747 transitions, 34270 flow [2021-10-13 22:52:59,132 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=32719, PETRI_DIFFERENCE_MINUEND_PLACES=787, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=419, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=34270, PETRI_PLACES=833, PETRI_TRANSITIONS=747} [2021-10-13 22:52:59,132 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 767 predicate places. [2021-10-13 22:52:59,132 INFO L470 AbstractCegarLoop]: Abstraction has has 833 places, 747 transitions, 34270 flow [2021-10-13 22:52:59,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.041666666666664) internal successors, (1297), 24 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:52:59,133 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:52:59,133 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:52:59,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-10-13 22:52:59,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-10-13 22:52:59,333 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:52:59,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:52:59,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1083365073, now seen corresponding path program 86 times [2021-10-13 22:52:59,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:52:59,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307019424] [2021-10-13 22:52:59,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:52:59,334 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:52:59,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:52:59,570 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:52:59,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:52:59,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307019424] [2021-10-13 22:52:59,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307019424] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:52:59,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907032244] [2021-10-13 22:52:59,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:52:59,570 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:52:59,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:52:59,571 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:52:59,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-10-13 22:53:02,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:53:02,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:53:02,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 22:53:02,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:53:03,023 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:53:03,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907032244] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:53:03,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:53:03,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-10-13 22:53:03,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024512171] [2021-10-13 22:53:03,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 22:53:03,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:53:03,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 22:53:03,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-10-13 22:53:03,025 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:53:03,025 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 833 places, 747 transitions, 34270 flow. Second operand has 25 states, 25 states have (on average 54.08) internal successors, (1352), 25 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:03,025 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:53:03,025 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:53:03,025 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:53:05,914 INFO L129 PetriNetUnfolder]: 643/4934 cut-off events. [2021-10-13 22:53:05,914 INFO L130 PetriNetUnfolder]: For 1297471/1298173 co-relation queries the response was YES. [2021-10-13 22:53:06,016 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54961 conditions, 4934 events. 643/4934 cut-off events. For 1297471/1298173 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 49015 event pairs, 0 based on Foata normal form. 164/4569 useless extension candidates. Maximal degree in co-relation 54570. Up to 857 conditions per place. [2021-10-13 22:53:06,051 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 280 selfloop transitions, 463 changer transitions 8/795 dead transitions. [2021-10-13 22:53:06,051 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 870 places, 795 transitions, 41172 flow [2021-10-13 22:53:06,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-10-13 22:53:06,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-10-13 22:53:06,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2275 transitions. [2021-10-13 22:53:06,053 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8407243163340724 [2021-10-13 22:53:06,053 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2275 transitions. [2021-10-13 22:53:06,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2275 transitions. [2021-10-13 22:53:06,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:53:06,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2275 transitions. [2021-10-13 22:53:06,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 55.48780487804878) internal successors, (2275), 41 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:06,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 66.0) internal successors, (2772), 42 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:06,057 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 66.0) internal successors, (2772), 42 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:06,057 INFO L186 Difference]: Start difference. First operand has 833 places, 747 transitions, 34270 flow. Second operand 41 states and 2275 transitions. [2021-10-13 22:53:06,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 870 places, 795 transitions, 41172 flow [2021-10-13 22:53:11,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 838 places, 795 transitions, 40276 flow, removed 186 selfloop flow, removed 32 redundant places. [2021-10-13 22:53:11,190 INFO L242 Difference]: Finished difference. Result has 845 places, 755 transitions, 35354 flow [2021-10-13 22:53:11,191 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=33554, PETRI_DIFFERENCE_MINUEND_PLACES=798, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=455, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=35354, PETRI_PLACES=845, PETRI_TRANSITIONS=755} [2021-10-13 22:53:11,191 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 779 predicate places. [2021-10-13 22:53:11,191 INFO L470 AbstractCegarLoop]: Abstraction has has 845 places, 755 transitions, 35354 flow [2021-10-13 22:53:11,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.08) internal successors, (1352), 25 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:11,191 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:53:11,192 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:53:11,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-10-13 22:53:11,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:53:11,392 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:53:11,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:53:11,392 INFO L82 PathProgramCache]: Analyzing trace with hash 219583359, now seen corresponding path program 87 times [2021-10-13 22:53:11,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:53:11,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742749849] [2021-10-13 22:53:11,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:53:11,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:53:11,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:53:11,645 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:53:11,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:53:11,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742749849] [2021-10-13 22:53:11,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742749849] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:53:11,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582218939] [2021-10-13 22:53:11,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:53:11,646 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:53:11,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:53:11,647 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:53:11,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-10-13 22:53:14,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-10-13 22:53:14,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:53:14,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-13 22:53:14,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:53:15,208 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:53:15,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582218939] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:53:15,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:53:15,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-10-13 22:53:15,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487306258] [2021-10-13 22:53:15,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 22:53:15,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:53:15,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 22:53:15,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-10-13 22:53:15,210 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:53:15,211 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 845 places, 755 transitions, 35354 flow. Second operand has 24 states, 24 states have (on average 54.041666666666664) internal successors, (1297), 24 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:15,211 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:53:15,211 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:53:15,211 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:53:18,112 INFO L129 PetriNetUnfolder]: 655/5049 cut-off events. [2021-10-13 22:53:18,113 INFO L130 PetriNetUnfolder]: For 1307972/1308618 co-relation queries the response was YES. [2021-10-13 22:53:18,212 INFO L84 FinitePrefix]: Finished finitePrefix Result has 56191 conditions, 5049 events. 655/5049 cut-off events. For 1307972/1308618 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 50428 event pairs, 0 based on Foata normal form. 175/4682 useless extension candidates. Maximal degree in co-relation 55796. Up to 877 conditions per place. [2021-10-13 22:53:18,247 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 259 selfloop transitions, 496 changer transitions 8/807 dead transitions. [2021-10-13 22:53:18,248 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 883 places, 807 transitions, 42588 flow [2021-10-13 22:53:18,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-13 22:53:18,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-10-13 22:53:18,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2331 transitions. [2021-10-13 22:53:18,249 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8409090909090909 [2021-10-13 22:53:18,249 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2331 transitions. [2021-10-13 22:53:18,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2331 transitions. [2021-10-13 22:53:18,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:53:18,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2331 transitions. [2021-10-13 22:53:18,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 55.5) internal successors, (2331), 42 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:18,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 66.0) internal successors, (2838), 43 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:18,252 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 66.0) internal successors, (2838), 43 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:18,252 INFO L186 Difference]: Start difference. First operand has 845 places, 755 transitions, 35354 flow. Second operand 42 states and 2331 transitions. [2021-10-13 22:53:18,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 883 places, 807 transitions, 42588 flow [2021-10-13 22:53:24,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 847 places, 807 transitions, 41517 flow, removed 171 selfloop flow, removed 36 redundant places. [2021-10-13 22:53:24,033 INFO L242 Difference]: Finished difference. Result has 854 places, 767 transitions, 36547 flow [2021-10-13 22:53:24,033 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=34431, PETRI_DIFFERENCE_MINUEND_PLACES=806, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=755, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=484, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=36547, PETRI_PLACES=854, PETRI_TRANSITIONS=767} [2021-10-13 22:53:24,033 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 788 predicate places. [2021-10-13 22:53:24,033 INFO L470 AbstractCegarLoop]: Abstraction has has 854 places, 767 transitions, 36547 flow [2021-10-13 22:53:24,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.041666666666664) internal successors, (1297), 24 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:24,034 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:53:24,034 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:53:24,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-10-13 22:53:24,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:53:24,234 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:53:24,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:53:24,235 INFO L82 PathProgramCache]: Analyzing trace with hash 147308419, now seen corresponding path program 88 times [2021-10-13 22:53:24,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:53:24,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766366892] [2021-10-13 22:53:24,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:53:24,235 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:53:24,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:53:24,459 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:53:24,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:53:24,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766366892] [2021-10-13 22:53:24,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766366892] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:53:24,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231820931] [2021-10-13 22:53:24,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 22:53:24,460 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:53:24,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:53:24,460 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:53:24,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-10-13 22:53:27,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 22:53:27,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:53:27,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 22:53:27,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:53:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:53:28,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231820931] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:53:28,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:53:28,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-10-13 22:53:28,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164928874] [2021-10-13 22:53:28,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 22:53:28,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:53:28,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 22:53:28,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-10-13 22:53:28,010 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:53:28,011 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 854 places, 767 transitions, 36547 flow. Second operand has 25 states, 25 states have (on average 54.08) internal successors, (1352), 25 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:28,011 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:53:28,011 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:53:28,011 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:53:31,053 INFO L129 PetriNetUnfolder]: 657/5067 cut-off events. [2021-10-13 22:53:31,053 INFO L130 PetriNetUnfolder]: For 1317176/1317822 co-relation queries the response was YES. [2021-10-13 22:53:31,250 INFO L84 FinitePrefix]: Finished finitePrefix Result has 56658 conditions, 5067 events. 657/5067 cut-off events. For 1317176/1317822 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 50650 event pairs, 0 based on Foata normal form. 180/4703 useless extension candidates. Maximal degree in co-relation 56259. Up to 881 conditions per place. [2021-10-13 22:53:31,287 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 236 selfloop transitions, 522 changer transitions 8/810 dead transitions. [2021-10-13 22:53:31,288 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 893 places, 810 transitions, 43351 flow [2021-10-13 22:53:31,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-13 22:53:31,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-10-13 22:53:31,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2387 transitions. [2021-10-13 22:53:31,289 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8410852713178295 [2021-10-13 22:53:31,289 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2387 transitions. [2021-10-13 22:53:31,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2387 transitions. [2021-10-13 22:53:31,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:53:31,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2387 transitions. [2021-10-13 22:53:31,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 55.51162790697674) internal successors, (2387), 43 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:31,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 66.0) internal successors, (2904), 44 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:31,293 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 66.0) internal successors, (2904), 44 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:31,293 INFO L186 Difference]: Start difference. First operand has 854 places, 767 transitions, 36547 flow. Second operand 43 states and 2387 transitions. [2021-10-13 22:53:31,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 893 places, 810 transitions, 43351 flow [2021-10-13 22:53:36,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 857 places, 810 transitions, 42303 flow, removed 171 selfloop flow, removed 36 redundant places. [2021-10-13 22:53:36,842 INFO L242 Difference]: Finished difference. Result has 862 places, 769 transitions, 37078 flow [2021-10-13 22:53:36,842 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=35643, PETRI_DIFFERENCE_MINUEND_PLACES=815, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=520, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=37078, PETRI_PLACES=862, PETRI_TRANSITIONS=769} [2021-10-13 22:53:36,842 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 796 predicate places. [2021-10-13 22:53:36,843 INFO L470 AbstractCegarLoop]: Abstraction has has 862 places, 769 transitions, 37078 flow [2021-10-13 22:53:36,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.08) internal successors, (1352), 25 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:36,843 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:53:36,843 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:53:36,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-10-13 22:53:37,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:53:37,044 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:53:37,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:53:37,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1070808091, now seen corresponding path program 89 times [2021-10-13 22:53:37,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:53:37,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848511736] [2021-10-13 22:53:37,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:53:37,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:53:37,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:53:37,253 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:53:37,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:53:37,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848511736] [2021-10-13 22:53:37,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848511736] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:53:37,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420434760] [2021-10-13 22:53:37,254 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 22:53:37,254 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:53:37,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:53:37,255 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:53:37,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-10-13 22:53:40,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-10-13 22:53:40,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:53:40,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 22:53:40,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:53:40,849 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 4 proven. 350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:53:40,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420434760] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:53:40,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:53:40,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-10-13 22:53:40,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707109326] [2021-10-13 22:53:40,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 22:53:40,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:53:40,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 22:53:40,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-10-13 22:53:40,851 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:53:40,852 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 862 places, 769 transitions, 37078 flow. Second operand has 25 states, 25 states have (on average 54.08) internal successors, (1352), 25 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:40,852 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:53:40,852 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:53:40,852 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:53:44,199 INFO L129 PetriNetUnfolder]: 659/5078 cut-off events. [2021-10-13 22:53:44,199 INFO L130 PetriNetUnfolder]: For 1323097/1323797 co-relation queries the response was YES. [2021-10-13 22:53:44,307 INFO L84 FinitePrefix]: Finished finitePrefix Result has 57075 conditions, 5078 events. 659/5078 cut-off events. For 1323097/1323797 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 50826 event pairs, 0 based on Foata normal form. 205/4738 useless extension candidates. Maximal degree in co-relation 56674. Up to 885 conditions per place. [2021-10-13 22:53:44,421 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 186 selfloop transitions, 576 changer transitions 8/814 dead transitions. [2021-10-13 22:53:44,421 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 903 places, 814 transitions, 44178 flow [2021-10-13 22:53:44,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-10-13 22:53:44,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-10-13 22:53:44,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2499 transitions. [2021-10-13 22:53:44,423 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8414141414141414 [2021-10-13 22:53:44,423 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2499 transitions. [2021-10-13 22:53:44,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2499 transitions. [2021-10-13 22:53:44,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:53:44,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2499 transitions. [2021-10-13 22:53:44,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 55.53333333333333) internal successors, (2499), 45 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:44,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 66.0) internal successors, (3036), 46 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:44,426 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 66.0) internal successors, (3036), 46 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:44,426 INFO L186 Difference]: Start difference. First operand has 862 places, 769 transitions, 37078 flow. Second operand 45 states and 2499 transitions. [2021-10-13 22:53:44,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 903 places, 814 transitions, 44178 flow [2021-10-13 22:53:50,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 864 places, 814 transitions, 43031 flow, removed 169 selfloop flow, removed 39 redundant places. [2021-10-13 22:53:50,175 INFO L242 Difference]: Finished difference. Result has 870 places, 772 transitions, 37664 flow [2021-10-13 22:53:50,175 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=36083, PETRI_DIFFERENCE_MINUEND_PLACES=820, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=769, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=573, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=37664, PETRI_PLACES=870, PETRI_TRANSITIONS=772} [2021-10-13 22:53:50,176 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 804 predicate places. [2021-10-13 22:53:50,176 INFO L470 AbstractCegarLoop]: Abstraction has has 870 places, 772 transitions, 37664 flow [2021-10-13 22:53:50,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.08) internal successors, (1352), 25 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:50,176 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:53:50,176 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:53:50,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-10-13 22:53:50,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:53:50,377 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:53:50,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:53:50,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1023000417, now seen corresponding path program 90 times [2021-10-13 22:53:50,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:53:50,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326405904] [2021-10-13 22:53:50,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:53:50,378 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:53:50,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:53:50,634 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:53:50,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:53:50,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326405904] [2021-10-13 22:53:50,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326405904] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:53:50,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917430178] [2021-10-13 22:53:50,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 22:53:50,635 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:53:50,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:53:50,636 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:53:50,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-10-13 22:53:53,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-10-13 22:53:53,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:53:53,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-13 22:53:53,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:53:54,137 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:53:54,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917430178] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:53:54,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:53:54,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-10-13 22:53:54,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915610164] [2021-10-13 22:53:54,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 22:53:54,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:53:54,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 22:53:54,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-10-13 22:53:54,139 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:53:54,140 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 870 places, 772 transitions, 37664 flow. Second operand has 25 states, 25 states have (on average 54.08) internal successors, (1352), 25 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:54,140 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:53:54,140 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:53:54,140 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:53:57,356 INFO L129 PetriNetUnfolder]: 662/5112 cut-off events. [2021-10-13 22:53:57,356 INFO L130 PetriNetUnfolder]: For 1333250/1333898 co-relation queries the response was YES. [2021-10-13 22:53:57,466 INFO L84 FinitePrefix]: Finished finitePrefix Result has 57649 conditions, 5112 events. 662/5112 cut-off events. For 1333250/1333898 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 51145 event pairs, 0 based on Foata normal form. 226/4790 useless extension candidates. Maximal degree in co-relation 57245. Up to 891 conditions per place. [2021-10-13 22:53:57,502 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 154 selfloop transitions, 616 changer transitions 8/822 dead transitions. [2021-10-13 22:53:57,502 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 913 places, 822 transitions, 45284 flow [2021-10-13 22:53:57,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-10-13 22:53:57,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-10-13 22:53:57,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2611 transitions. [2021-10-13 22:53:57,505 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8417150225660864 [2021-10-13 22:53:57,505 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2611 transitions. [2021-10-13 22:53:57,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2611 transitions. [2021-10-13 22:53:57,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:53:57,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2611 transitions. [2021-10-13 22:53:57,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 55.5531914893617) internal successors, (2611), 47 states have internal predecessors, (2611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:57,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 66.0) internal successors, (3168), 48 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:57,509 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 66.0) internal successors, (3168), 48 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:53:57,509 INFO L186 Difference]: Start difference. First operand has 870 places, 772 transitions, 37664 flow. Second operand 47 states and 2611 transitions. [2021-10-13 22:53:57,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 913 places, 822 transitions, 45284 flow [2021-10-13 22:54:04,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 875 places, 822 transitions, 44008 flow, removed 178 selfloop flow, removed 38 redundant places. [2021-10-13 22:54:04,203 INFO L242 Difference]: Finished difference. Result has 881 places, 777 transitions, 38440 flow [2021-10-13 22:54:04,203 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=36552, PETRI_DIFFERENCE_MINUEND_PLACES=829, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=772, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=611, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=38440, PETRI_PLACES=881, PETRI_TRANSITIONS=777} [2021-10-13 22:54:04,203 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 815 predicate places. [2021-10-13 22:54:04,203 INFO L470 AbstractCegarLoop]: Abstraction has has 881 places, 777 transitions, 38440 flow [2021-10-13 22:54:04,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.08) internal successors, (1352), 25 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:04,204 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:54:04,204 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:54:04,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-10-13 22:54:04,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-10-13 22:54:04,406 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:54:04,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:54:04,406 INFO L82 PathProgramCache]: Analyzing trace with hash 155151521, now seen corresponding path program 91 times [2021-10-13 22:54:04,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:54:04,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323299923] [2021-10-13 22:54:04,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:54:04,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:54:04,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:54:04,602 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:54:04,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:54:04,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323299923] [2021-10-13 22:54:04,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323299923] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:54:04,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6569524] [2021-10-13 22:54:04,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 22:54:04,603 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:54:04,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:54:04,604 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:54:04,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-10-13 22:54:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:54:07,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 22:54:07,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:54:08,258 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:54:08,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6569524] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:54:08,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:54:08,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-10-13 22:54:08,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921421825] [2021-10-13 22:54:08,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 22:54:08,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:54:08,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 22:54:08,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-10-13 22:54:08,259 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:54:08,260 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 881 places, 777 transitions, 38440 flow. Second operand has 24 states, 24 states have (on average 54.041666666666664) internal successors, (1297), 24 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:08,260 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:54:08,260 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:54:08,260 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:54:11,376 INFO L129 PetriNetUnfolder]: 677/5173 cut-off events. [2021-10-13 22:54:11,376 INFO L130 PetriNetUnfolder]: For 1402084/1402857 co-relation queries the response was YES. [2021-10-13 22:54:11,596 INFO L84 FinitePrefix]: Finished finitePrefix Result has 59685 conditions, 5173 events. 677/5173 cut-off events. For 1402084/1402857 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 51596 event pairs, 0 based on Foata normal form. 234/4854 useless extension candidates. Maximal degree in co-relation 59278. Up to 911 conditions per place. [2021-10-13 22:54:11,636 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 156 selfloop transitions, 625 changer transitions 8/833 dead transitions. [2021-10-13 22:54:11,636 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 925 places, 833 transitions, 46694 flow [2021-10-13 22:54:11,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-10-13 22:54:11,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-10-13 22:54:11,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2671 transitions. [2021-10-13 22:54:11,638 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8431186868686869 [2021-10-13 22:54:11,638 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2671 transitions. [2021-10-13 22:54:11,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2671 transitions. [2021-10-13 22:54:11,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:54:11,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2671 transitions. [2021-10-13 22:54:11,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 55.645833333333336) internal successors, (2671), 48 states have internal predecessors, (2671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:11,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 66.0) internal successors, (3234), 49 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:11,642 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 66.0) internal successors, (3234), 49 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:11,642 INFO L186 Difference]: Start difference. First operand has 881 places, 777 transitions, 38440 flow. Second operand 48 states and 2671 transitions. [2021-10-13 22:54:11,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 925 places, 833 transitions, 46694 flow [2021-10-13 22:54:18,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 881 places, 833 transitions, 45060 flow, removed 264 selfloop flow, removed 44 redundant places. [2021-10-13 22:54:18,561 INFO L242 Difference]: Finished difference. Result has 888 places, 783 transitions, 39143 flow [2021-10-13 22:54:18,562 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=36948, PETRI_DIFFERENCE_MINUEND_PLACES=834, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=777, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=619, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=39143, PETRI_PLACES=888, PETRI_TRANSITIONS=783} [2021-10-13 22:54:18,562 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 822 predicate places. [2021-10-13 22:54:18,562 INFO L470 AbstractCegarLoop]: Abstraction has has 888 places, 783 transitions, 39143 flow [2021-10-13 22:54:18,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.041666666666664) internal successors, (1297), 24 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:18,562 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:54:18,563 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:54:18,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-10-13 22:54:18,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-10-13 22:54:18,763 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:54:18,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:54:18,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1196258391, now seen corresponding path program 92 times [2021-10-13 22:54:18,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:54:18,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053099011] [2021-10-13 22:54:18,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:54:18,764 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:54:18,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:54:18,963 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:54:18,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:54:18,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053099011] [2021-10-13 22:54:18,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053099011] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:54:18,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255582302] [2021-10-13 22:54:18,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 22:54:18,964 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:54:18,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:54:18,964 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:54:18,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-10-13 22:54:22,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 22:54:22,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:54:22,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-13 22:54:22,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:54:22,655 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 22:54:22,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255582302] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:54:22,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 22:54:22,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-10-13 22:54:22,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119370879] [2021-10-13 22:54:22,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 22:54:22,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:54:22,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 22:54:22,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-10-13 22:54:22,657 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-13 22:54:22,658 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 888 places, 783 transitions, 39143 flow. Second operand has 25 states, 25 states have (on average 54.08) internal successors, (1352), 25 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:22,658 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:54:22,658 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-13 22:54:22,658 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:54:26,102 INFO L129 PetriNetUnfolder]: 672/5158 cut-off events. [2021-10-13 22:54:26,102 INFO L130 PetriNetUnfolder]: For 1466729/1467432 co-relation queries the response was YES. [2021-10-13 22:54:26,218 INFO L84 FinitePrefix]: Finished finitePrefix Result has 60333 conditions, 5158 events. 672/5158 cut-off events. For 1466729/1467432 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 51552 event pairs, 0 based on Foata normal form. 245/4852 useless extension candidates. Maximal degree in co-relation 59922. Up to 905 conditions per place. [2021-10-13 22:54:26,255 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 146 selfloop transitions, 635 changer transitions 11/836 dead transitions. [2021-10-13 22:54:26,255 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 932 places, 836 transitions, 47535 flow [2021-10-13 22:54:26,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-10-13 22:54:26,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-10-13 22:54:26,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2668 transitions. [2021-10-13 22:54:26,257 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8421717171717171 [2021-10-13 22:54:26,322 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2668 transitions. [2021-10-13 22:54:26,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2668 transitions. [2021-10-13 22:54:26,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:54:26,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2668 transitions. [2021-10-13 22:54:26,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 55.583333333333336) internal successors, (2668), 48 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:26,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 66.0) internal successors, (3234), 49 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:26,326 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 66.0) internal successors, (3234), 49 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:26,326 INFO L186 Difference]: Start difference. First operand has 888 places, 783 transitions, 39143 flow. Second operand 48 states and 2668 transitions. [2021-10-13 22:54:26,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 932 places, 836 transitions, 47535 flow [2021-10-13 22:54:32,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 889 places, 836 transitions, 45488 flow, removed 473 selfloop flow, removed 43 redundant places. [2021-10-13 22:54:32,397 INFO L242 Difference]: Finished difference. Result has 895 places, 786 transitions, 39329 flow [2021-10-13 22:54:32,398 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=37560, PETRI_DIFFERENCE_MINUEND_PLACES=842, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=783, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=632, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=39329, PETRI_PLACES=895, PETRI_TRANSITIONS=786} [2021-10-13 22:54:32,398 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 829 predicate places. [2021-10-13 22:54:32,398 INFO L470 AbstractCegarLoop]: Abstraction has has 895 places, 786 transitions, 39329 flow [2021-10-13 22:54:32,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.08) internal successors, (1352), 25 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:32,398 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:54:32,398 INFO L254 CegarLoopForPetriNet]: trace histogram [11, 11, 10, 10, 10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:54:32,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-10-13 22:54:32,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-10-13 22:54:32,600 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:54:32,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:54:32,600 INFO L82 PathProgramCache]: Analyzing trace with hash 251801158, now seen corresponding path program 93 times [2021-10-13 22:54:32,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:54:32,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2475328] [2021-10-13 22:54:32,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:54:32,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:54:32,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 22:54:32,794 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 347 proven. 45 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 22:54:32,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 22:54:32,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2475328] [2021-10-13 22:54:32,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2475328] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 22:54:32,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935860120] [2021-10-13 22:54:32,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 22:54:32,795 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 22:54:32,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 22:54:32,795 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 22:54:32,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-10-13 22:54:36,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-10-13 22:54:36,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 22:54:36,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 22:54:36,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 22:54:36,505 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 392 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 22:54:36,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935860120] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 22:54:36,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 22:54:36,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 25 [2021-10-13 22:54:36,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212821025] [2021-10-13 22:54:36,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 22:54:36,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 22:54:36,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 22:54:36,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-10-13 22:54:36,507 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 66 [2021-10-13 22:54:36,507 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 895 places, 786 transitions, 39329 flow. Second operand has 23 states, 23 states have (on average 56.869565217391305) internal successors, (1308), 23 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:36,507 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-13 22:54:36,508 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 66 [2021-10-13 22:54:36,508 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-13 22:54:51,147 INFO L129 PetriNetUnfolder]: 3525/20846 cut-off events. [2021-10-13 22:54:51,148 INFO L130 PetriNetUnfolder]: For 4919709/4920907 co-relation queries the response was YES. [2021-10-13 22:54:51,932 INFO L84 FinitePrefix]: Finished finitePrefix Result has 219153 conditions, 20846 events. 3525/20846 cut-off events. For 4919709/4920907 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 276021 event pairs, 894 based on Foata normal form. 320/18922 useless extension candidates. Maximal degree in co-relation 218741. Up to 3424 conditions per place. [2021-10-13 22:54:52,076 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 12 selfloop transitions, 41 changer transitions 0/826 dead transitions. [2021-10-13 22:54:52,076 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 924 places, 826 transitions, 39306 flow [2021-10-13 22:54:52,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-13 22:54:52,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-10-13 22:54:52,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1869 transitions. [2021-10-13 22:54:52,078 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8581267217630854 [2021-10-13 22:54:52,078 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1869 transitions. [2021-10-13 22:54:52,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1869 transitions. [2021-10-13 22:54:52,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 22:54:52,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1869 transitions. [2021-10-13 22:54:52,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 56.63636363636363) internal successors, (1869), 33 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:52,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 66.0) internal successors, (2244), 34 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:52,080 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 66.0) internal successors, (2244), 34 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:54:52,080 INFO L186 Difference]: Start difference. First operand has 895 places, 786 transitions, 39329 flow. Second operand 33 states and 1869 transitions. [2021-10-13 22:54:52,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 924 places, 826 transitions, 39306 flow [2021-10-13 22:55:08,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 879 places, 826 transitions, 37619 flow, removed 295 selfloop flow, removed 45 redundant places. [2021-10-13 22:55:08,112 INFO L242 Difference]: Finished difference. Result has 880 places, 817 transitions, 37592 flow [2021-10-13 22:55:08,112 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=37421, PETRI_DIFFERENCE_MINUEND_PLACES=847, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=775, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=37592, PETRI_PLACES=880, PETRI_TRANSITIONS=817} [2021-10-13 22:55:08,112 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 814 predicate places. [2021-10-13 22:55:08,113 INFO L470 AbstractCegarLoop]: Abstraction has has 880 places, 817 transitions, 37592 flow [2021-10-13 22:55:08,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 56.869565217391305) internal successors, (1308), 23 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 22:55:08,113 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-13 22:55:08,113 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 22:55:08,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-10-13 22:55:08,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-10-13 22:55:08,313 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 22:55:08,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 22:55:08,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1677249387, now seen corresponding path program 94 times [2021-10-13 22:55:08,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 22:55:08,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058943945] [2021-10-13 22:55:08,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 22:55:08,314 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 22:55:08,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 22:55:08,353 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 22:55:08,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 22:55:08,434 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 22:55:08,434 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 22:55:08,435 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 22:55:08,436 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-13 22:55:08,436 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-13 22:55:08,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-10-13 22:55:08,443 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-13 22:55:08,443 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 22:55:08,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 10:55:08 BasicIcfg [2021-10-13 22:55:08,548 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 22:55:08,549 INFO L168 Benchmark]: Toolchain (without parser) took 511853.00 ms. Allocated memory was 194.0 MB in the beginning and 6.1 GB in the end (delta: 5.9 GB). Free memory was 133.6 MB in the beginning and 2.7 GB in the end (delta: -2.6 GB). Peak memory consumption was 3.3 GB. Max. memory is 8.0 GB. [2021-10-13 22:55:08,550 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 194.0 MB. Free memory was 151.4 MB in the beginning and 151.3 MB in the end (delta: 54.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-10-13 22:55:08,550 INFO L168 Benchmark]: CACSL2BoogieTranslator took 473.65 ms. Allocated memory was 194.0 MB in the beginning and 243.3 MB in the end (delta: 49.3 MB). Free memory was 133.4 MB in the beginning and 203.7 MB in the end (delta: -70.3 MB). Peak memory consumption was 9.7 MB. Max. memory is 8.0 GB. [2021-10-13 22:55:08,552 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.46 ms. Allocated memory is still 243.3 MB. Free memory was 203.7 MB in the beginning and 201.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-13 22:55:08,552 INFO L168 Benchmark]: Boogie Preprocessor took 32.68 ms. Allocated memory is still 243.3 MB. Free memory was 201.7 MB in the beginning and 200.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-10-13 22:55:08,552 INFO L168 Benchmark]: RCFGBuilder took 390.62 ms. Allocated memory is still 243.3 MB. Free memory was 200.6 MB in the beginning and 188.0 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-10-13 22:55:08,552 INFO L168 Benchmark]: TraceAbstraction took 510899.85 ms. Allocated memory was 243.3 MB in the beginning and 6.1 GB in the end (delta: 5.9 GB). Free memory was 188.0 MB in the beginning and 2.7 GB in the end (delta: -2.5 GB). Peak memory consumption was 3.4 GB. Max. memory is 8.0 GB. [2021-10-13 22:55:08,553 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 194.0 MB. Free memory was 151.4 MB in the beginning and 151.3 MB in the end (delta: 54.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 473.65 ms. Allocated memory was 194.0 MB in the beginning and 243.3 MB in the end (delta: 49.3 MB). Free memory was 133.4 MB in the beginning and 203.7 MB in the end (delta: -70.3 MB). Peak memory consumption was 9.7 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 49.46 ms. Allocated memory is still 243.3 MB. Free memory was 203.7 MB in the beginning and 201.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.68 ms. Allocated memory is still 243.3 MB. Free memory was 201.7 MB in the beginning and 200.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 390.62 ms. Allocated memory is still 243.3 MB. Free memory was 200.6 MB in the beginning and 188.0 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 510899.85 ms. Allocated memory was 243.3 MB in the beginning and 6.1 GB in the end (delta: 5.9 GB). Free memory was 188.0 MB in the beginning and 2.7 GB in the end (delta: -2.5 GB). Peak memory consumption was 3.4 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 - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; VAL [i=3, j=6] [L712] 0 pthread_t id1, id2; VAL [i=3, j=6] [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, i=7, j=6, k=0] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0] [L716] 0 int condI = i >= (2*10 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=0] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=0] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=1] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=0] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=1] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=1] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=2] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=1] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=2] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=2] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=3] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=2] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=2, k=4] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=2] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=3] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=4] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=3, k=4] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=5] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=4] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=5] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=5] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=5] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=6] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=6] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=6, k=6] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=6] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=6] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=6, k=7] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=7] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=7] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=7, k=7] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=7, k=8] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=7, k=8] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=7, k=8] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=8] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=8] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=8, k=8] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=8, k=9] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=8, k=9] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=8, k=9] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=9] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=9] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L719] 0 int condJ = j >= (2*10 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L721] COND TRUE 0 condI || condJ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L722] 0 reach_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] - UnprovableResult [Line: 713]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 19.6ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 510684.5ms, OverallIterations: 104, TraceHistogramMax: 11, EmptinessCheckTime: 0.0ms, AutomataDifference: 299994.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 68.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 480 SDtfs, 4581 SDslu, 1435 SDs, 0 SdLazy, 14643 SolverSat, 9362 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8078.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13040 GetRequests, 9104 SyntacticMatches, 0 SemanticMatches, 3936 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41400 ImplicationChecksByTransitivity, 35737.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=39329occurred in iteration=102, InterpolantAutomatonStates: 2971, 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: 931.6ms SsaConstructionTime, 2879.0ms SatisfiabilityAnalysisTime, 43872.5ms InterpolantComputationTime, 18550 NumberOfCodeBlocks, 18550 NumberOfCodeBlocksAsserted, 527 NumberOfCheckSat, 18220 ConstructedInterpolants, 0 QuantifiedInterpolants, 73378 SizeOfPredicates, 1329 NumberOfNonLiveVariables, 19798 ConjunctsInSsa, 1874 ConjunctsInUnsatCore, 200 InterpolantComputations, 7 PerfectInterpolantSequences, 808/33436 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 proved your program to be incorrect! [2021-10-13 22:55:08,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...