/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-Before.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-mult-equiv.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 08:42:44,802 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 08:42:44,804 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 08:42:44,852 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 08:42:44,853 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 08:42:44,855 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 08:42:44,865 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 08:42:44,869 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 08:42:44,870 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 08:42:44,874 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 08:42:44,875 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 08:42:44,876 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 08:42:44,876 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 08:42:44,878 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 08:42:44,879 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 08:42:44,882 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 08:42:44,882 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 08:42:44,883 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 08:42:44,885 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 08:42:44,889 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 08:42:44,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 08:42:44,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 08:42:44,893 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 08:42:44,894 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 08:42:44,899 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 08:42:44,899 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 08:42:44,900 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 08:42:44,901 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 08:42:44,901 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 08:42:44,902 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 08:42:44,902 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 08:42:44,903 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 08:42:44,904 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 08:42:44,905 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 08:42:44,906 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 08:42:44,906 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 08:42:44,906 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 08:42:44,907 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 08:42:44,907 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 08:42:44,907 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 08:42:44,908 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 08:42:44,909 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-Before.epf [2022-01-19 08:42:44,938 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 08:42:44,938 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 08:42:44,939 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 08:42:44,939 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 08:42:44,940 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 08:42:44,940 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 08:42:44,940 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 08:42:44,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 08:42:44,940 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 08:42:44,940 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 08:42:44,941 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 08:42:44,941 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 08:42:44,941 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 08:42:44,941 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 08:42:44,941 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 08:42:44,941 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 08:42:44,942 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 08:42:44,942 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 08:42:44,942 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 08:42:44,942 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 08:42:44,942 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 08:42:44,942 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 08:42:44,942 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 08:42:44,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 08:42:44,943 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 08:42:44,943 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 08:42:44,943 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 08:42:44,944 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 08:42:44,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 08:42:44,944 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 08:42:44,944 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 08:42:44,944 INFO L138 SettingsManager]: * When to check the insufficient erros location relative to the other error locations=BEFORE [2022-01-19 08:42:44,945 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 08:42:45,153 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 08:42:45,171 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 08:42:45,174 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 08:42:45,174 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 08:42:45,176 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 08:42:45,177 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-mult-equiv.wvr.c [2022-01-19 08:42:45,242 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3716d3f9b/b09e12f8c1df4bb68397ba880af798c4/FLAG43eb7addd [2022-01-19 08:42:45,583 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 08:42:45,583 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-mult-equiv.wvr.c [2022-01-19 08:42:45,589 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3716d3f9b/b09e12f8c1df4bb68397ba880af798c4/FLAG43eb7addd [2022-01-19 08:42:45,600 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3716d3f9b/b09e12f8c1df4bb68397ba880af798c4 [2022-01-19 08:42:45,602 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 08:42:45,604 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 08:42:45,605 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 08:42:45,605 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 08:42:45,609 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 08:42:45,610 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 08:42:45" (1/1) ... [2022-01-19 08:42:45,611 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43f6168 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:42:45, skipping insertion in model container [2022-01-19 08:42:45,611 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 08:42:45" (1/1) ... [2022-01-19 08:42:45,616 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 08:42:45,632 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 08:42:45,783 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-mult-equiv.wvr.c[2591,2604] [2022-01-19 08:42:45,785 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 08:42:45,791 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 08:42:45,810 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-mult-equiv.wvr.c[2591,2604] [2022-01-19 08:42:45,811 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 08:42:45,827 INFO L208 MainTranslator]: Completed translation [2022-01-19 08:42:45,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:42:45 WrapperNode [2022-01-19 08:42:45,828 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 08:42:45,829 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 08:42:45,829 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 08:42:45,829 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 08:42:45,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:42:45" (1/1) ... [2022-01-19 08:42:45,839 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:42:45" (1/1) ... [2022-01-19 08:42:45,854 INFO L137 Inliner]: procedures = 22, calls = 39, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2022-01-19 08:42:45,856 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 08:42:45,864 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 08:42:45,864 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 08:42:45,864 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 08:42:45,872 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:42:45" (1/1) ... [2022-01-19 08:42:45,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:42:45" (1/1) ... [2022-01-19 08:42:45,876 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:42:45" (1/1) ... [2022-01-19 08:42:45,877 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:42:45" (1/1) ... [2022-01-19 08:42:45,881 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:42:45" (1/1) ... [2022-01-19 08:42:45,891 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:42:45" (1/1) ... [2022-01-19 08:42:45,892 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:42:45" (1/1) ... [2022-01-19 08:42:45,894 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 08:42:45,895 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 08:42:45,895 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 08:42:45,895 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 08:42:45,902 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:42:45" (1/1) ... [2022-01-19 08:42:45,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 08:42:45,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:42:45,940 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-19 08:42:45,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-19 08:42:45,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 08:42:45,992 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-19 08:42:45,992 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-19 08:42:45,993 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-19 08:42:45,993 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-19 08:42:45,993 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-19 08:42:45,993 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-19 08:42:45,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 08:42:45,994 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 08:42:45,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 08:42:45,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-19 08:42:45,996 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-19 08:42:45,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 08:42:45,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 08:42:45,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 08:42:45,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 08:42:45,998 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-19 08:42:46,090 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 08:42:46,093 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 08:42:46,260 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 08:42:46,301 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 08:42:46,301 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-19 08:42:46,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 08:42:46 BoogieIcfgContainer [2022-01-19 08:42:46,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 08:42:46,305 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 08:42:46,305 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 08:42:46,307 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 08:42:46,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 08:42:45" (1/3) ... [2022-01-19 08:42:46,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@233cf09f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 08:42:46, skipping insertion in model container [2022-01-19 08:42:46,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:42:45" (2/3) ... [2022-01-19 08:42:46,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@233cf09f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 08:42:46, skipping insertion in model container [2022-01-19 08:42:46,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 08:42:46" (3/3) ... [2022-01-19 08:42:46,310 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-mult-equiv.wvr.c [2022-01-19 08:42:46,313 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 08:42:46,314 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 08:42:46,314 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 08:42:46,373 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,374 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,374 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,374 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,375 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,375 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,376 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,376 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,376 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,376 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,377 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,377 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,377 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,378 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,378 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,379 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,379 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,380 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,380 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,380 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,381 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,381 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,381 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,382 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,382 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,382 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,383 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,384 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,385 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,385 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,385 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,385 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,390 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,390 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,398 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,399 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,399 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,399 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,401 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,402 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,402 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,406 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,406 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,406 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:42:46,417 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-19 08:42:46,453 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 08:42:46,459 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-19 08:42:46,459 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-19 08:42:46,470 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 100 places, 97 transitions, 218 flow [2022-01-19 08:42:46,514 INFO L129 PetriNetUnfolder]: 7/94 cut-off events. [2022-01-19 08:42:46,514 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-01-19 08:42:46,518 INFO L84 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 94 events. 7/94 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2022-01-19 08:42:46,518 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 97 transitions, 218 flow [2022-01-19 08:42:46,523 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 83 transitions, 184 flow [2022-01-19 08:42:46,550 INFO L129 PetriNetUnfolder]: 7/82 cut-off events. [2022-01-19 08:42:46,550 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-01-19 08:42:46,551 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:42:46,551 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:42:46,558 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 08:42:46,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:42:46,562 INFO L85 PathProgramCache]: Analyzing trace with hash 64157928, now seen corresponding path program 1 times [2022-01-19 08:42:46,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:42:46,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973374235] [2022-01-19 08:42:46,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:42:46,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:42:46,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:42:46,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:42:46,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:42:46,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973374235] [2022-01-19 08:42:46,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973374235] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:42:46,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:42:46,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-19 08:42:46,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817797113] [2022-01-19 08:42:46,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:42:46,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-19 08:42:46,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:42:46,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-19 08:42:46,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-19 08:42:46,842 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 97 [2022-01-19 08:42:46,847 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 184 flow. Second operand has 2 states, 2 states have (on average 87.5) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:46,847 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:42:46,847 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 97 [2022-01-19 08:42:46,848 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:42:46,940 INFO L129 PetriNetUnfolder]: 26/138 cut-off events. [2022-01-19 08:42:46,940 INFO L130 PetriNetUnfolder]: For 28/29 co-relation queries the response was YES. [2022-01-19 08:42:46,943 INFO L84 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 138 events. 26/138 cut-off events. For 28/29 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 246 event pairs, 7 based on Foata normal form. 25/148 useless extension candidates. Maximal degree in co-relation 127. Up to 39 conditions per place. [2022-01-19 08:42:46,945 INFO L132 encePairwiseOnDemand]: 93/97 looper letters, 9 selfloop transitions, 0 changer transitions 1/79 dead transitions. [2022-01-19 08:42:46,945 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 79 transitions, 194 flow [2022-01-19 08:42:46,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-19 08:42:46,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-01-19 08:42:46,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 179 transitions. [2022-01-19 08:42:46,963 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9226804123711341 [2022-01-19 08:42:46,963 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 179 transitions. [2022-01-19 08:42:46,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 179 transitions. [2022-01-19 08:42:46,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:42:46,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 179 transitions. [2022-01-19 08:42:46,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 89.5) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:46,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:46,986 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:46,988 INFO L186 Difference]: Start difference. First operand has 86 places, 83 transitions, 184 flow. Second operand 2 states and 179 transitions. [2022-01-19 08:42:46,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 79 transitions, 194 flow [2022-01-19 08:42:46,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 79 transitions, 182 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-01-19 08:42:46,997 INFO L242 Difference]: Finished difference. Result has 81 places, 78 transitions, 162 flow [2022-01-19 08:42:46,998 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=162, PETRI_PLACES=81, PETRI_TRANSITIONS=78} [2022-01-19 08:42:47,003 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, -5 predicate places. [2022-01-19 08:42:47,004 INFO L470 AbstractCegarLoop]: Abstraction has has 81 places, 78 transitions, 162 flow [2022-01-19 08:42:47,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 87.5) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:47,004 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:42:47,005 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:42:47,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 08:42:47,005 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 08:42:47,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:42:47,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1292779301, now seen corresponding path program 1 times [2022-01-19 08:42:47,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:42:47,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379582493] [2022-01-19 08:42:47,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:42:47,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:42:47,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:42:47,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:42:47,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:42:47,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379582493] [2022-01-19 08:42:47,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379582493] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:42:47,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:42:47,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 08:42:47,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271159782] [2022-01-19 08:42:47,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:42:47,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 08:42:47,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:42:47,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 08:42:47,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-19 08:42:47,317 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 97 [2022-01-19 08:42:47,317 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 78 transitions, 162 flow. Second operand has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:47,318 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:42:47,318 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 97 [2022-01-19 08:42:47,318 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:42:47,448 INFO L129 PetriNetUnfolder]: 34/192 cut-off events. [2022-01-19 08:42:47,448 INFO L130 PetriNetUnfolder]: For 12/13 co-relation queries the response was YES. [2022-01-19 08:42:47,451 INFO L84 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 192 events. 34/192 cut-off events. For 12/13 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 479 event pairs, 1 based on Foata normal form. 2/180 useless extension candidates. Maximal degree in co-relation 266. Up to 44 conditions per place. [2022-01-19 08:42:47,453 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 25 selfloop transitions, 7 changer transitions 4/99 dead transitions. [2022-01-19 08:42:47,453 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 99 transitions, 284 flow [2022-01-19 08:42:47,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 08:42:47,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 08:42:47,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 493 transitions. [2022-01-19 08:42:47,459 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8470790378006873 [2022-01-19 08:42:47,459 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 493 transitions. [2022-01-19 08:42:47,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 493 transitions. [2022-01-19 08:42:47,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:42:47,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 493 transitions. [2022-01-19 08:42:47,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.16666666666667) internal successors, (493), 6 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:47,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:47,466 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:47,466 INFO L186 Difference]: Start difference. First operand has 81 places, 78 transitions, 162 flow. Second operand 6 states and 493 transitions. [2022-01-19 08:42:47,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 99 transitions, 284 flow [2022-01-19 08:42:47,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 99 transitions, 284 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 08:42:47,470 INFO L242 Difference]: Finished difference. Result has 88 places, 83 transitions, 202 flow [2022-01-19 08:42:47,470 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=202, PETRI_PLACES=88, PETRI_TRANSITIONS=83} [2022-01-19 08:42:47,471 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 2 predicate places. [2022-01-19 08:42:47,471 INFO L470 AbstractCegarLoop]: Abstraction has has 88 places, 83 transitions, 202 flow [2022-01-19 08:42:47,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:47,472 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:42:47,472 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:42:47,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 08:42:47,473 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 08:42:47,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:42:47,474 INFO L85 PathProgramCache]: Analyzing trace with hash -187386445, now seen corresponding path program 1 times [2022-01-19 08:42:47,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:42:47,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214255237] [2022-01-19 08:42:47,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:42:47,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:42:47,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:42:47,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:42:47,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:42:47,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214255237] [2022-01-19 08:42:47,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214255237] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:42:47,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:42:47,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 08:42:47,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320796544] [2022-01-19 08:42:47,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:42:47,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 08:42:47,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:42:47,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 08:42:47,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-19 08:42:47,762 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-01-19 08:42:47,763 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 202 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:47,763 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:42:47,763 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-01-19 08:42:47,763 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:42:48,070 INFO L129 PetriNetUnfolder]: 297/760 cut-off events. [2022-01-19 08:42:48,071 INFO L130 PetriNetUnfolder]: For 129/134 co-relation queries the response was YES. [2022-01-19 08:42:48,073 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1459 conditions, 760 events. 297/760 cut-off events. For 129/134 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4079 event pairs, 54 based on Foata normal form. 0/648 useless extension candidates. Maximal degree in co-relation 1452. Up to 254 conditions per place. [2022-01-19 08:42:48,079 INFO L132 encePairwiseOnDemand]: 87/97 looper letters, 53 selfloop transitions, 20 changer transitions 0/130 dead transitions. [2022-01-19 08:42:48,079 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 130 transitions, 486 flow [2022-01-19 08:42:48,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-19 08:42:48,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-01-19 08:42:48,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 636 transitions. [2022-01-19 08:42:48,081 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8195876288659794 [2022-01-19 08:42:48,081 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 636 transitions. [2022-01-19 08:42:48,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 636 transitions. [2022-01-19 08:42:48,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:42:48,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 636 transitions. [2022-01-19 08:42:48,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 79.5) internal successors, (636), 8 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:48,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:48,086 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:48,086 INFO L186 Difference]: Start difference. First operand has 88 places, 83 transitions, 202 flow. Second operand 8 states and 636 transitions. [2022-01-19 08:42:48,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 130 transitions, 486 flow [2022-01-19 08:42:48,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 130 transitions, 482 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-01-19 08:42:48,095 INFO L242 Difference]: Finished difference. Result has 96 places, 98 transitions, 330 flow [2022-01-19 08:42:48,096 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=330, PETRI_PLACES=96, PETRI_TRANSITIONS=98} [2022-01-19 08:42:48,098 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 10 predicate places. [2022-01-19 08:42:48,098 INFO L470 AbstractCegarLoop]: Abstraction has has 96 places, 98 transitions, 330 flow [2022-01-19 08:42:48,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:48,098 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:42:48,099 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:42:48,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-19 08:42:48,099 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 08:42:48,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:42:48,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1540254679, now seen corresponding path program 2 times [2022-01-19 08:42:48,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:42:48,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082446076] [2022-01-19 08:42:48,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:42:48,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:42:48,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:42:48,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:42:48,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:42:48,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082446076] [2022-01-19 08:42:48,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082446076] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:42:48,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:42:48,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 08:42:48,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176452176] [2022-01-19 08:42:48,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:42:48,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 08:42:48,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:42:48,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 08:42:48,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-19 08:42:48,245 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-01-19 08:42:48,246 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 98 transitions, 330 flow. Second operand has 5 states, 5 states have (on average 74.2) internal successors, (371), 5 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:48,246 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:42:48,246 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-01-19 08:42:48,246 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:42:48,441 INFO L129 PetriNetUnfolder]: 371/890 cut-off events. [2022-01-19 08:42:48,441 INFO L130 PetriNetUnfolder]: For 450/454 co-relation queries the response was YES. [2022-01-19 08:42:48,443 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2102 conditions, 890 events. 371/890 cut-off events. For 450/454 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4800 event pairs, 71 based on Foata normal form. 18/843 useless extension candidates. Maximal degree in co-relation 2091. Up to 395 conditions per place. [2022-01-19 08:42:48,447 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 53 selfloop transitions, 21 changer transitions 2/133 dead transitions. [2022-01-19 08:42:48,448 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 133 transitions, 628 flow [2022-01-19 08:42:48,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 08:42:48,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 08:42:48,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 485 transitions. [2022-01-19 08:42:48,449 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2022-01-19 08:42:48,449 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 485 transitions. [2022-01-19 08:42:48,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 485 transitions. [2022-01-19 08:42:48,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:42:48,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 485 transitions. [2022-01-19 08:42:48,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 80.83333333333333) internal successors, (485), 6 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:48,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:48,453 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:48,453 INFO L186 Difference]: Start difference. First operand has 96 places, 98 transitions, 330 flow. Second operand 6 states and 485 transitions. [2022-01-19 08:42:48,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 133 transitions, 628 flow [2022-01-19 08:42:48,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 133 transitions, 621 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-01-19 08:42:48,458 INFO L242 Difference]: Finished difference. Result has 104 places, 108 transitions, 469 flow [2022-01-19 08:42:48,458 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=469, PETRI_PLACES=104, PETRI_TRANSITIONS=108} [2022-01-19 08:42:48,459 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 18 predicate places. [2022-01-19 08:42:48,459 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 108 transitions, 469 flow [2022-01-19 08:42:48,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.2) internal successors, (371), 5 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:48,459 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:42:48,460 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:42:48,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-19 08:42:48,460 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 08:42:48,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:42:48,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1923841693, now seen corresponding path program 3 times [2022-01-19 08:42:48,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:42:48,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796653902] [2022-01-19 08:42:48,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:42:48,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:42:48,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:42:48,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:42:48,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:42:48,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796653902] [2022-01-19 08:42:48,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796653902] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:42:48,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:42:48,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 08:42:48,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149876497] [2022-01-19 08:42:48,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:42:48,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 08:42:48,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:42:48,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 08:42:48,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-19 08:42:48,579 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-01-19 08:42:48,580 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 108 transitions, 469 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:48,580 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:42:48,580 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-01-19 08:42:48,580 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:42:48,923 INFO L129 PetriNetUnfolder]: 576/1343 cut-off events. [2022-01-19 08:42:48,924 INFO L130 PetriNetUnfolder]: For 998/1044 co-relation queries the response was YES. [2022-01-19 08:42:48,929 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3285 conditions, 1343 events. 576/1343 cut-off events. For 998/1044 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8163 event pairs, 89 based on Foata normal form. 19/1294 useless extension candidates. Maximal degree in co-relation 3269. Up to 389 conditions per place. [2022-01-19 08:42:48,937 INFO L132 encePairwiseOnDemand]: 85/97 looper letters, 70 selfloop transitions, 38 changer transitions 2/167 dead transitions. [2022-01-19 08:42:48,937 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 167 transitions, 917 flow [2022-01-19 08:42:48,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-19 08:42:48,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-19 08:42:48,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 731 transitions. [2022-01-19 08:42:48,940 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8373424971363116 [2022-01-19 08:42:48,940 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 731 transitions. [2022-01-19 08:42:48,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 731 transitions. [2022-01-19 08:42:48,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:42:48,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 731 transitions. [2022-01-19 08:42:48,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 81.22222222222223) internal successors, (731), 9 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:48,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:48,943 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:48,944 INFO L186 Difference]: Start difference. First operand has 104 places, 108 transitions, 469 flow. Second operand 9 states and 731 transitions. [2022-01-19 08:42:48,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 167 transitions, 917 flow [2022-01-19 08:42:48,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 167 transitions, 871 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-01-19 08:42:48,951 INFO L242 Difference]: Finished difference. Result has 116 places, 121 transitions, 671 flow [2022-01-19 08:42:48,951 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=671, PETRI_PLACES=116, PETRI_TRANSITIONS=121} [2022-01-19 08:42:48,952 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 30 predicate places. [2022-01-19 08:42:48,952 INFO L470 AbstractCegarLoop]: Abstraction has has 116 places, 121 transitions, 671 flow [2022-01-19 08:42:48,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:48,952 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:42:48,952 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:42:48,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-19 08:42:48,953 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 08:42:48,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:42:48,953 INFO L85 PathProgramCache]: Analyzing trace with hash 982794509, now seen corresponding path program 4 times [2022-01-19 08:42:48,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:42:48,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184196482] [2022-01-19 08:42:48,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:42:48,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:42:48,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:42:49,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:42:49,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:42:49,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184196482] [2022-01-19 08:42:49,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184196482] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:42:49,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:42:49,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 08:42:49,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623938398] [2022-01-19 08:42:49,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:42:49,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 08:42:49,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:42:49,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 08:42:49,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-19 08:42:49,039 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-01-19 08:42:49,039 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 121 transitions, 671 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:49,039 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:42:49,039 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-01-19 08:42:49,040 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:42:49,299 INFO L129 PetriNetUnfolder]: 594/1397 cut-off events. [2022-01-19 08:42:49,300 INFO L130 PetriNetUnfolder]: For 2230/2243 co-relation queries the response was YES. [2022-01-19 08:42:49,306 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3953 conditions, 1397 events. 594/1397 cut-off events. For 2230/2243 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 8647 event pairs, 153 based on Foata normal form. 16/1310 useless extension candidates. Maximal degree in co-relation 3932. Up to 527 conditions per place. [2022-01-19 08:42:49,315 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 64 selfloop transitions, 37 changer transitions 2/160 dead transitions. [2022-01-19 08:42:49,315 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 160 transitions, 1072 flow [2022-01-19 08:42:49,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-19 08:42:49,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-01-19 08:42:49,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 639 transitions. [2022-01-19 08:42:49,317 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8234536082474226 [2022-01-19 08:42:49,317 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 639 transitions. [2022-01-19 08:42:49,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 639 transitions. [2022-01-19 08:42:49,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:42:49,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 639 transitions. [2022-01-19 08:42:49,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 79.875) internal successors, (639), 8 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:49,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:49,320 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:49,321 INFO L186 Difference]: Start difference. First operand has 116 places, 121 transitions, 671 flow. Second operand 8 states and 639 transitions. [2022-01-19 08:42:49,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 160 transitions, 1072 flow [2022-01-19 08:42:49,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 160 transitions, 1052 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-01-19 08:42:49,334 INFO L242 Difference]: Finished difference. Result has 124 places, 128 transitions, 818 flow [2022-01-19 08:42:49,334 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=818, PETRI_PLACES=124, PETRI_TRANSITIONS=128} [2022-01-19 08:42:49,335 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 38 predicate places. [2022-01-19 08:42:49,335 INFO L470 AbstractCegarLoop]: Abstraction has has 124 places, 128 transitions, 818 flow [2022-01-19 08:42:49,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:49,335 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:42:49,336 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:42:49,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-19 08:42:49,336 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 08:42:49,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:42:49,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1775458840, now seen corresponding path program 1 times [2022-01-19 08:42:49,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:42:49,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498019089] [2022-01-19 08:42:49,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:42:49,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:42:49,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:42:49,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:42:49,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:42:49,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498019089] [2022-01-19 08:42:49,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498019089] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:42:49,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:42:49,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 08:42:49,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983387776] [2022-01-19 08:42:49,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:42:49,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 08:42:49,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:42:49,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 08:42:49,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-19 08:42:49,411 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-01-19 08:42:49,411 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 128 transitions, 818 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:49,411 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:42:49,411 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-01-19 08:42:49,411 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:42:49,781 INFO L129 PetriNetUnfolder]: 836/1929 cut-off events. [2022-01-19 08:42:49,781 INFO L130 PetriNetUnfolder]: For 3921/4121 co-relation queries the response was YES. [2022-01-19 08:42:49,792 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5970 conditions, 1929 events. 836/1929 cut-off events. For 3921/4121 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 13026 event pairs, 166 based on Foata normal form. 81/1833 useless extension candidates. Maximal degree in co-relation 5945. Up to 719 conditions per place. [2022-01-19 08:42:49,802 INFO L132 encePairwiseOnDemand]: 87/97 looper letters, 49 selfloop transitions, 41 changer transitions 0/156 dead transitions. [2022-01-19 08:42:49,803 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 156 transitions, 1099 flow [2022-01-19 08:42:49,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 08:42:49,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 08:42:49,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 486 transitions. [2022-01-19 08:42:49,804 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8350515463917526 [2022-01-19 08:42:49,804 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 486 transitions. [2022-01-19 08:42:49,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 486 transitions. [2022-01-19 08:42:49,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:42:49,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 486 transitions. [2022-01-19 08:42:49,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.0) internal successors, (486), 6 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:49,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:49,807 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:49,808 INFO L186 Difference]: Start difference. First operand has 124 places, 128 transitions, 818 flow. Second operand 6 states and 486 transitions. [2022-01-19 08:42:49,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 156 transitions, 1099 flow [2022-01-19 08:42:49,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 156 transitions, 1035 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-01-19 08:42:49,828 INFO L242 Difference]: Finished difference. Result has 127 places, 133 transitions, 920 flow [2022-01-19 08:42:49,829 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=920, PETRI_PLACES=127, PETRI_TRANSITIONS=133} [2022-01-19 08:42:49,829 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 41 predicate places. [2022-01-19 08:42:49,829 INFO L470 AbstractCegarLoop]: Abstraction has has 127 places, 133 transitions, 920 flow [2022-01-19 08:42:49,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:49,830 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:42:49,830 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:42:49,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-19 08:42:49,830 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 08:42:49,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:42:49,831 INFO L85 PathProgramCache]: Analyzing trace with hash -2079569762, now seen corresponding path program 2 times [2022-01-19 08:42:49,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:42:49,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180532619] [2022-01-19 08:42:49,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:42:49,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:42:49,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:42:49,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:42:49,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:42:49,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180532619] [2022-01-19 08:42:49,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180532619] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:42:49,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:42:49,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 08:42:49,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024692520] [2022-01-19 08:42:49,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:42:49,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 08:42:49,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:42:49,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 08:42:49,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-19 08:42:49,938 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-01-19 08:42:49,938 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 133 transitions, 920 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:49,938 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:42:49,938 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-01-19 08:42:49,938 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:42:50,261 INFO L129 PetriNetUnfolder]: 996/2323 cut-off events. [2022-01-19 08:42:50,261 INFO L130 PetriNetUnfolder]: For 7235/7426 co-relation queries the response was YES. [2022-01-19 08:42:50,272 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8181 conditions, 2323 events. 996/2323 cut-off events. For 7235/7426 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 16848 event pairs, 79 based on Foata normal form. 81/2312 useless extension candidates. Maximal degree in co-relation 8153. Up to 752 conditions per place. [2022-01-19 08:42:50,286 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 99 selfloop transitions, 74 changer transitions 2/241 dead transitions. [2022-01-19 08:42:50,287 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 241 transitions, 2537 flow [2022-01-19 08:42:50,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-19 08:42:50,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-01-19 08:42:50,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 411 transitions. [2022-01-19 08:42:50,288 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8474226804123711 [2022-01-19 08:42:50,288 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 411 transitions. [2022-01-19 08:42:50,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 411 transitions. [2022-01-19 08:42:50,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:42:50,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 411 transitions. [2022-01-19 08:42:50,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.2) internal successors, (411), 5 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:50,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:50,291 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:50,291 INFO L186 Difference]: Start difference. First operand has 127 places, 133 transitions, 920 flow. Second operand 5 states and 411 transitions. [2022-01-19 08:42:50,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 241 transitions, 2537 flow [2022-01-19 08:42:50,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 241 transitions, 2403 flow, removed 15 selfloop flow, removed 2 redundant places. [2022-01-19 08:42:50,318 INFO L242 Difference]: Finished difference. Result has 132 places, 188 transitions, 1830 flow [2022-01-19 08:42:50,319 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=872, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1830, PETRI_PLACES=132, PETRI_TRANSITIONS=188} [2022-01-19 08:42:50,319 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 46 predicate places. [2022-01-19 08:42:50,320 INFO L470 AbstractCegarLoop]: Abstraction has has 132 places, 188 transitions, 1830 flow [2022-01-19 08:42:50,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:50,320 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:42:50,320 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:42:50,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-19 08:42:50,320 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 08:42:50,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:42:50,321 INFO L85 PathProgramCache]: Analyzing trace with hash 823447134, now seen corresponding path program 1 times [2022-01-19 08:42:50,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:42:50,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903094922] [2022-01-19 08:42:50,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:42:50,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:42:50,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:42:50,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:42:50,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:42:50,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903094922] [2022-01-19 08:42:50,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903094922] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:42:50,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775802378] [2022-01-19 08:42:50,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:42:50,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:42:50,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:42:50,431 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:42:50,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-19 08:42:50,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:42:50,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-19 08:42:50,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:42:51,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:42:51,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:42:51,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:42:51,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775802378] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:42:51,728 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:42:51,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2022-01-19 08:42:51,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068092475] [2022-01-19 08:42:51,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:42:51,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-19 08:42:51,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:42:51,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-19 08:42:51,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-01-19 08:42:51,731 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 97 [2022-01-19 08:42:51,732 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 188 transitions, 1830 flow. Second operand has 16 states, 16 states have (on average 67.875) internal successors, (1086), 16 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:51,732 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:42:51,732 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 97 [2022-01-19 08:42:51,732 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:42:52,576 INFO L129 PetriNetUnfolder]: 1451/3478 cut-off events. [2022-01-19 08:42:52,576 INFO L130 PetriNetUnfolder]: For 13232/13363 co-relation queries the response was YES. [2022-01-19 08:42:52,595 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13593 conditions, 3478 events. 1451/3478 cut-off events. For 13232/13363 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 27180 event pairs, 165 based on Foata normal form. 172/3581 useless extension candidates. Maximal degree in co-relation 13562. Up to 760 conditions per place. [2022-01-19 08:42:52,616 INFO L132 encePairwiseOnDemand]: 84/97 looper letters, 197 selfloop transitions, 110 changer transitions 10/369 dead transitions. [2022-01-19 08:42:52,617 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 369 transitions, 4117 flow [2022-01-19 08:42:52,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-19 08:42:52,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-01-19 08:42:52,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1089 transitions. [2022-01-19 08:42:52,620 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7484536082474227 [2022-01-19 08:42:52,620 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1089 transitions. [2022-01-19 08:42:52,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1089 transitions. [2022-01-19 08:42:52,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:42:52,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1089 transitions. [2022-01-19 08:42:52,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 72.6) internal successors, (1089), 15 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:52,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 97.0) internal successors, (1552), 16 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:52,625 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 97.0) internal successors, (1552), 16 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:52,625 INFO L186 Difference]: Start difference. First operand has 132 places, 188 transitions, 1830 flow. Second operand 15 states and 1089 transitions. [2022-01-19 08:42:52,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 369 transitions, 4117 flow [2022-01-19 08:42:52,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 369 transitions, 4115 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-01-19 08:42:52,666 INFO L242 Difference]: Finished difference. Result has 153 places, 228 transitions, 2620 flow [2022-01-19 08:42:52,666 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=1828, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2620, PETRI_PLACES=153, PETRI_TRANSITIONS=228} [2022-01-19 08:42:52,667 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 67 predicate places. [2022-01-19 08:42:52,667 INFO L470 AbstractCegarLoop]: Abstraction has has 153 places, 228 transitions, 2620 flow [2022-01-19 08:42:52,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 67.875) internal successors, (1086), 16 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:52,668 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:42:52,668 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:42:52,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-19 08:42:52,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:42:52,896 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 08:42:52,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:42:52,896 INFO L85 PathProgramCache]: Analyzing trace with hash 124335744, now seen corresponding path program 2 times [2022-01-19 08:42:52,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:42:52,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701106375] [2022-01-19 08:42:52,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:42:52,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:42:52,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:42:53,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:42:53,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:42:53,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701106375] [2022-01-19 08:42:53,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701106375] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:42:53,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746746823] [2022-01-19 08:42:53,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:42:53,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:42:53,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:42:53,144 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:42:53,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-19 08:42:53,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:42:53,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:42:53,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 08:42:53,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:42:53,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:42:53,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-19 08:42:53,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746746823] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:42:53,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-19 08:42:53,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-01-19 08:42:53,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335857366] [2022-01-19 08:42:53,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:42:53,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 08:42:53,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:42:53,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 08:42:53,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-01-19 08:42:53,472 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2022-01-19 08:42:53,472 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 228 transitions, 2620 flow. Second operand has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:53,473 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:42:53,473 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2022-01-19 08:42:53,473 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:42:54,426 INFO L129 PetriNetUnfolder]: 2586/5598 cut-off events. [2022-01-19 08:42:54,426 INFO L130 PetriNetUnfolder]: For 25913/25913 co-relation queries the response was YES. [2022-01-19 08:42:54,464 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23983 conditions, 5598 events. 2586/5598 cut-off events. For 25913/25913 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 46389 event pairs, 870 based on Foata normal form. 19/5496 useless extension candidates. Maximal degree in co-relation 23944. Up to 3766 conditions per place. [2022-01-19 08:42:54,498 INFO L132 encePairwiseOnDemand]: 84/97 looper letters, 180 selfloop transitions, 82 changer transitions 7/324 dead transitions. [2022-01-19 08:42:54,499 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 324 transitions, 4252 flow [2022-01-19 08:42:54,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-19 08:42:54,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-01-19 08:42:54,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 642 transitions. [2022-01-19 08:42:54,501 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8273195876288659 [2022-01-19 08:42:54,501 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 642 transitions. [2022-01-19 08:42:54,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 642 transitions. [2022-01-19 08:42:54,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:42:54,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 642 transitions. [2022-01-19 08:42:54,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 80.25) internal successors, (642), 8 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:54,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:54,504 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:54,504 INFO L186 Difference]: Start difference. First operand has 153 places, 228 transitions, 2620 flow. Second operand 8 states and 642 transitions. [2022-01-19 08:42:54,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 324 transitions, 4252 flow [2022-01-19 08:42:54,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 324 transitions, 4088 flow, removed 33 selfloop flow, removed 5 redundant places. [2022-01-19 08:42:54,595 INFO L242 Difference]: Finished difference. Result has 159 places, 271 transitions, 3537 flow [2022-01-19 08:42:54,595 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=2508, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3537, PETRI_PLACES=159, PETRI_TRANSITIONS=271} [2022-01-19 08:42:54,596 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 73 predicate places. [2022-01-19 08:42:54,596 INFO L470 AbstractCegarLoop]: Abstraction has has 159 places, 271 transitions, 3537 flow [2022-01-19 08:42:54,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:54,596 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:42:54,596 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:42:54,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-19 08:42:54,819 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,SelfDestructingSolverStorable9 [2022-01-19 08:42:54,820 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 08:42:54,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:42:54,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1893633040, now seen corresponding path program 3 times [2022-01-19 08:42:54,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:42:54,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007415409] [2022-01-19 08:42:54,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:42:54,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:42:54,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:42:54,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:42:54,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:42:54,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007415409] [2022-01-19 08:42:54,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007415409] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:42:54,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:42:54,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 08:42:54,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890302748] [2022-01-19 08:42:54,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:42:54,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 08:42:54,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:42:54,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 08:42:54,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-19 08:42:54,917 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2022-01-19 08:42:54,917 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 271 transitions, 3537 flow. Second operand has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:54,918 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:42:54,918 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2022-01-19 08:42:54,918 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:42:55,715 INFO L129 PetriNetUnfolder]: 2587/5651 cut-off events. [2022-01-19 08:42:55,715 INFO L130 PetriNetUnfolder]: For 30144/30227 co-relation queries the response was YES. [2022-01-19 08:42:55,756 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25255 conditions, 5651 events. 2587/5651 cut-off events. For 30144/30227 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 46822 event pairs, 1032 based on Foata normal form. 12/5506 useless extension candidates. Maximal degree in co-relation 25212. Up to 3838 conditions per place. [2022-01-19 08:42:55,799 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 164 selfloop transitions, 75 changer transitions 1/295 dead transitions. [2022-01-19 08:42:55,799 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 295 transitions, 4192 flow [2022-01-19 08:42:55,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-19 08:42:55,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-01-19 08:42:55,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 403 transitions. [2022-01-19 08:42:55,800 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8309278350515464 [2022-01-19 08:42:55,800 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 403 transitions. [2022-01-19 08:42:55,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 403 transitions. [2022-01-19 08:42:55,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:42:55,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 403 transitions. [2022-01-19 08:42:55,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 80.6) internal successors, (403), 5 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:55,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:55,803 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:55,803 INFO L186 Difference]: Start difference. First operand has 159 places, 271 transitions, 3537 flow. Second operand 5 states and 403 transitions. [2022-01-19 08:42:55,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 295 transitions, 4192 flow [2022-01-19 08:42:55,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 295 transitions, 4149 flow, removed 11 selfloop flow, removed 1 redundant places. [2022-01-19 08:42:55,890 INFO L242 Difference]: Finished difference. Result has 164 places, 273 transitions, 3764 flow [2022-01-19 08:42:55,890 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=3494, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3764, PETRI_PLACES=164, PETRI_TRANSITIONS=273} [2022-01-19 08:42:55,891 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 78 predicate places. [2022-01-19 08:42:55,891 INFO L470 AbstractCegarLoop]: Abstraction has has 164 places, 273 transitions, 3764 flow [2022-01-19 08:42:55,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:55,891 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:42:55,891 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:42:55,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-19 08:42:55,892 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 08:42:55,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:42:55,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1885417408, now seen corresponding path program 3 times [2022-01-19 08:42:55,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:42:55,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952420649] [2022-01-19 08:42:55,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:42:55,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:42:55,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:42:56,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:42:56,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:42:56,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952420649] [2022-01-19 08:42:56,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952420649] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:42:56,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:42:56,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 08:42:56,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467707196] [2022-01-19 08:42:56,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:42:56,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 08:42:56,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:42:56,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 08:42:56,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-19 08:42:56,009 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-01-19 08:42:56,009 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 273 transitions, 3764 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:56,009 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:42:56,009 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-01-19 08:42:56,009 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:42:56,754 INFO L129 PetriNetUnfolder]: 2293/5624 cut-off events. [2022-01-19 08:42:56,754 INFO L130 PetriNetUnfolder]: For 30705/31223 co-relation queries the response was YES. [2022-01-19 08:42:56,800 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24668 conditions, 5624 events. 2293/5624 cut-off events. For 30705/31223 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 50519 event pairs, 309 based on Foata normal form. 82/5549 useless extension candidates. Maximal degree in co-relation 24623. Up to 2011 conditions per place. [2022-01-19 08:42:56,833 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 101 selfloop transitions, 199 changer transitions 2/376 dead transitions. [2022-01-19 08:42:56,833 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 376 transitions, 5527 flow [2022-01-19 08:42:56,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 08:42:56,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 08:42:56,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 497 transitions. [2022-01-19 08:42:56,835 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8539518900343642 [2022-01-19 08:42:56,835 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 497 transitions. [2022-01-19 08:42:56,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 497 transitions. [2022-01-19 08:42:56,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:42:56,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 497 transitions. [2022-01-19 08:42:56,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.83333333333333) internal successors, (497), 6 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:56,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:56,837 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:56,837 INFO L186 Difference]: Start difference. First operand has 164 places, 273 transitions, 3764 flow. Second operand 6 states and 497 transitions. [2022-01-19 08:42:56,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 376 transitions, 5527 flow [2022-01-19 08:42:56,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 376 transitions, 5446 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-01-19 08:42:56,941 INFO L242 Difference]: Finished difference. Result has 170 places, 333 transitions, 5068 flow [2022-01-19 08:42:56,941 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=3689, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5068, PETRI_PLACES=170, PETRI_TRANSITIONS=333} [2022-01-19 08:42:56,943 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 84 predicate places. [2022-01-19 08:42:56,943 INFO L470 AbstractCegarLoop]: Abstraction has has 170 places, 333 transitions, 5068 flow [2022-01-19 08:42:56,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:56,943 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:42:56,943 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:42:56,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-19 08:42:56,943 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 08:42:56,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:42:56,944 INFO L85 PathProgramCache]: Analyzing trace with hash 20413346, now seen corresponding path program 4 times [2022-01-19 08:42:56,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:42:56,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68156583] [2022-01-19 08:42:56,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:42:56,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:42:56,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:42:57,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:42:57,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:42:57,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68156583] [2022-01-19 08:42:57,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68156583] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:42:57,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:42:57,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 08:42:57,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640498911] [2022-01-19 08:42:57,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:42:57,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 08:42:57,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:42:57,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 08:42:57,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-19 08:42:57,103 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-01-19 08:42:57,103 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 333 transitions, 5068 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:57,103 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:42:57,103 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-01-19 08:42:57,104 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:42:57,810 INFO L129 PetriNetUnfolder]: 2118/5578 cut-off events. [2022-01-19 08:42:57,810 INFO L130 PetriNetUnfolder]: For 39697/40209 co-relation queries the response was YES. [2022-01-19 08:42:57,851 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26399 conditions, 5578 events. 2118/5578 cut-off events. For 39697/40209 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 52132 event pairs, 307 based on Foata normal form. 70/5484 useless extension candidates. Maximal degree in co-relation 26351. Up to 1847 conditions per place. [2022-01-19 08:42:57,884 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 102 selfloop transitions, 213 changer transitions 8/397 dead transitions. [2022-01-19 08:42:57,884 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 397 transitions, 6532 flow [2022-01-19 08:42:57,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 08:42:57,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 08:42:57,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 493 transitions. [2022-01-19 08:42:57,886 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8470790378006873 [2022-01-19 08:42:57,886 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 493 transitions. [2022-01-19 08:42:57,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 493 transitions. [2022-01-19 08:42:57,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:42:57,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 493 transitions. [2022-01-19 08:42:57,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.16666666666667) internal successors, (493), 6 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:57,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:57,888 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:57,888 INFO L186 Difference]: Start difference. First operand has 170 places, 333 transitions, 5068 flow. Second operand 6 states and 493 transitions. [2022-01-19 08:42:57,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 397 transitions, 6532 flow [2022-01-19 08:42:58,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 397 transitions, 6502 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-01-19 08:42:58,035 INFO L242 Difference]: Finished difference. Result has 177 places, 352 transitions, 5898 flow [2022-01-19 08:42:58,036 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=4994, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5898, PETRI_PLACES=177, PETRI_TRANSITIONS=352} [2022-01-19 08:42:58,037 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 91 predicate places. [2022-01-19 08:42:58,037 INFO L470 AbstractCegarLoop]: Abstraction has has 177 places, 352 transitions, 5898 flow [2022-01-19 08:42:58,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:58,037 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:42:58,037 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:42:58,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-19 08:42:58,037 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 08:42:58,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:42:58,038 INFO L85 PathProgramCache]: Analyzing trace with hash 620855476, now seen corresponding path program 5 times [2022-01-19 08:42:58,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:42:58,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981872775] [2022-01-19 08:42:58,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:42:58,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:42:58,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:42:58,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:42:58,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:42:58,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981872775] [2022-01-19 08:42:58,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981872775] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:42:58,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928291196] [2022-01-19 08:42:58,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 08:42:58,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:42:58,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:42:58,188 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:42:58,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-19 08:42:58,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:42:58,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:42:58,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 08:42:58,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:42:58,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:42:58,666 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-19 08:42:58,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928291196] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:42:58,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-19 08:42:58,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-01-19 08:42:58,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578394511] [2022-01-19 08:42:58,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:42:58,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 08:42:58,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:42:58,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 08:42:58,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-19 08:42:58,668 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2022-01-19 08:42:58,671 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 352 transitions, 5898 flow. Second operand has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:58,671 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:42:58,671 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2022-01-19 08:42:58,671 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:42:59,858 INFO L129 PetriNetUnfolder]: 3277/7199 cut-off events. [2022-01-19 08:42:59,859 INFO L130 PetriNetUnfolder]: For 62000/62000 co-relation queries the response was YES. [2022-01-19 08:42:59,896 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37679 conditions, 7199 events. 3277/7199 cut-off events. For 62000/62000 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 63126 event pairs, 948 based on Foata normal form. 39/7115 useless extension candidates. Maximal degree in co-relation 37628. Up to 4843 conditions per place. [2022-01-19 08:42:59,936 INFO L132 encePairwiseOnDemand]: 86/97 looper letters, 256 selfloop transitions, 108 changer transitions 9/428 dead transitions. [2022-01-19 08:42:59,936 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 428 transitions, 7523 flow [2022-01-19 08:42:59,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-19 08:42:59,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-19 08:42:59,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 716 transitions. [2022-01-19 08:42:59,939 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8201603665521191 [2022-01-19 08:42:59,939 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 716 transitions. [2022-01-19 08:42:59,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 716 transitions. [2022-01-19 08:42:59,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:42:59,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 716 transitions. [2022-01-19 08:42:59,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 79.55555555555556) internal successors, (716), 9 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:59,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:59,943 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:42:59,943 INFO L186 Difference]: Start difference. First operand has 177 places, 352 transitions, 5898 flow. Second operand 9 states and 716 transitions. [2022-01-19 08:42:59,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 428 transitions, 7523 flow [2022-01-19 08:43:00,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 428 transitions, 7499 flow, removed 12 selfloop flow, removed 0 redundant places. [2022-01-19 08:43:00,119 INFO L242 Difference]: Finished difference. Result has 189 places, 378 transitions, 6637 flow [2022-01-19 08:43:00,119 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=5878, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6637, PETRI_PLACES=189, PETRI_TRANSITIONS=378} [2022-01-19 08:43:00,119 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 103 predicate places. [2022-01-19 08:43:00,119 INFO L470 AbstractCegarLoop]: Abstraction has has 189 places, 378 transitions, 6637 flow [2022-01-19 08:43:00,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:43:00,120 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:43:00,120 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:43:00,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-19 08:43:00,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:43:00,324 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 08:43:00,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:43:00,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1277185608, now seen corresponding path program 4 times [2022-01-19 08:43:00,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:43:00,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515826029] [2022-01-19 08:43:00,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:43:00,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:43:00,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:43:00,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:43:00,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:43:00,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515826029] [2022-01-19 08:43:00,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515826029] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:43:00,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:43:00,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 08:43:00,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256217478] [2022-01-19 08:43:00,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:43:00,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 08:43:00,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:43:00,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 08:43:00,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-19 08:43:00,382 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-01-19 08:43:00,382 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 378 transitions, 6637 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:43:00,382 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:43:00,382 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-01-19 08:43:00,382 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:43:01,331 INFO L129 PetriNetUnfolder]: 2135/5356 cut-off events. [2022-01-19 08:43:01,331 INFO L130 PetriNetUnfolder]: For 54730/54890 co-relation queries the response was YES. [2022-01-19 08:43:01,361 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29082 conditions, 5356 events. 2135/5356 cut-off events. For 54730/54890 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 48142 event pairs, 658 based on Foata normal form. 108/5291 useless extension candidates. Maximal degree in co-relation 29026. Up to 3210 conditions per place. [2022-01-19 08:43:01,390 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 275 selfloop transitions, 63 changer transitions 6/407 dead transitions. [2022-01-19 08:43:01,390 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 407 transitions, 7506 flow [2022-01-19 08:43:01,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 08:43:01,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 08:43:01,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 476 transitions. [2022-01-19 08:43:01,393 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8178694158075601 [2022-01-19 08:43:01,393 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 476 transitions. [2022-01-19 08:43:01,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 476 transitions. [2022-01-19 08:43:01,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:43:01,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 476 transitions. [2022-01-19 08:43:01,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 79.33333333333333) internal successors, (476), 6 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:43:01,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:43:01,397 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:43:01,397 INFO L186 Difference]: Start difference. First operand has 189 places, 378 transitions, 6637 flow. Second operand 6 states and 476 transitions. [2022-01-19 08:43:01,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 407 transitions, 7506 flow [2022-01-19 08:43:01,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 407 transitions, 7348 flow, removed 39 selfloop flow, removed 2 redundant places. [2022-01-19 08:43:01,562 INFO L242 Difference]: Finished difference. Result has 195 places, 368 transitions, 6376 flow [2022-01-19 08:43:01,562 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=6185, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6376, PETRI_PLACES=195, PETRI_TRANSITIONS=368} [2022-01-19 08:43:01,563 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 109 predicate places. [2022-01-19 08:43:01,563 INFO L470 AbstractCegarLoop]: Abstraction has has 195 places, 368 transitions, 6376 flow [2022-01-19 08:43:01,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:43:01,563 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:43:01,563 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:43:01,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-19 08:43:01,564 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 08:43:01,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:43:01,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1504437282, now seen corresponding path program 6 times [2022-01-19 08:43:01,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:43:01,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543681926] [2022-01-19 08:43:01,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:43:01,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:43:01,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:43:01,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:43:01,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:43:01,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543681926] [2022-01-19 08:43:01,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543681926] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:43:01,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:43:01,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 08:43:01,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270595848] [2022-01-19 08:43:01,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:43:01,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 08:43:01,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:43:01,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 08:43:01,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-19 08:43:01,662 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-01-19 08:43:01,662 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 368 transitions, 6376 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:43:01,662 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:43:01,662 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-01-19 08:43:01,662 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:43:02,647 INFO L129 PetriNetUnfolder]: 2291/5559 cut-off events. [2022-01-19 08:43:02,648 INFO L130 PetriNetUnfolder]: For 53061/53664 co-relation queries the response was YES. [2022-01-19 08:43:02,674 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29823 conditions, 5559 events. 2291/5559 cut-off events. For 53061/53664 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 49667 event pairs, 249 based on Foata normal form. 127/5531 useless extension candidates. Maximal degree in co-relation 29763. Up to 1798 conditions per place. [2022-01-19 08:43:02,699 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 152 selfloop transitions, 195 changer transitions 4/423 dead transitions. [2022-01-19 08:43:02,699 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 423 transitions, 7783 flow [2022-01-19 08:43:02,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-19 08:43:02,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-01-19 08:43:02,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 416 transitions. [2022-01-19 08:43:02,700 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8577319587628865 [2022-01-19 08:43:02,700 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 416 transitions. [2022-01-19 08:43:02,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 416 transitions. [2022-01-19 08:43:02,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:43:02,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 416 transitions. [2022-01-19 08:43:02,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 83.2) internal successors, (416), 5 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:43:02,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:43:02,703 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:43:02,703 INFO L186 Difference]: Start difference. First operand has 195 places, 368 transitions, 6376 flow. Second operand 5 states and 416 transitions. [2022-01-19 08:43:02,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 423 transitions, 7783 flow [2022-01-19 08:43:02,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 423 transitions, 7627 flow, removed 17 selfloop flow, removed 4 redundant places. [2022-01-19 08:43:02,888 INFO L242 Difference]: Finished difference. Result has 198 places, 384 transitions, 7213 flow [2022-01-19 08:43:02,889 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=6209, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=7213, PETRI_PLACES=198, PETRI_TRANSITIONS=384} [2022-01-19 08:43:02,889 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 112 predicate places. [2022-01-19 08:43:02,889 INFO L470 AbstractCegarLoop]: Abstraction has has 198 places, 384 transitions, 7213 flow [2022-01-19 08:43:02,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:43:02,890 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:43:02,890 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:43:02,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-19 08:43:02,890 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 08:43:02,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:43:02,890 INFO L85 PathProgramCache]: Analyzing trace with hash -2008782444, now seen corresponding path program 7 times [2022-01-19 08:43:02,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:43:02,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96752122] [2022-01-19 08:43:02,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:43:02,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:43:02,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:43:02,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:43:02,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:43:02,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96752122] [2022-01-19 08:43:02,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96752122] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:43:02,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:43:02,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 08:43:02,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56700647] [2022-01-19 08:43:02,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:43:02,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 08:43:02,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:43:02,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 08:43:02,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-19 08:43:02,997 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-01-19 08:43:02,997 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 384 transitions, 7213 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:43:02,997 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:43:02,998 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-01-19 08:43:02,998 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:43:04,132 INFO L129 PetriNetUnfolder]: 2808/6674 cut-off events. [2022-01-19 08:43:04,132 INFO L130 PetriNetUnfolder]: For 76261/76441 co-relation queries the response was YES. [2022-01-19 08:43:04,163 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37474 conditions, 6674 events. 2808/6674 cut-off events. For 76261/76441 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 60870 event pairs, 801 based on Foata normal form. 70/6555 useless extension candidates. Maximal degree in co-relation 37413. Up to 4100 conditions per place. [2022-01-19 08:43:04,189 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 326 selfloop transitions, 75 changer transitions 3/475 dead transitions. [2022-01-19 08:43:04,189 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 475 transitions, 9561 flow [2022-01-19 08:43:04,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 08:43:04,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 08:43:04,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 487 transitions. [2022-01-19 08:43:04,190 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8367697594501718 [2022-01-19 08:43:04,190 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 487 transitions. [2022-01-19 08:43:04,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 487 transitions. [2022-01-19 08:43:04,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:43:04,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 487 transitions. [2022-01-19 08:43:04,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.16666666666667) internal successors, (487), 6 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) [2022-01-19 08:43:04,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:43:04,192 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:43:04,193 INFO L186 Difference]: Start difference. First operand has 198 places, 384 transitions, 7213 flow. Second operand 6 states and 487 transitions. [2022-01-19 08:43:04,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 475 transitions, 9561 flow [2022-01-19 08:43:04,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 475 transitions, 9114 flow, removed 13 selfloop flow, removed 6 redundant places. [2022-01-19 08:43:04,353 INFO L242 Difference]: Finished difference. Result has 198 places, 399 transitions, 7385 flow [2022-01-19 08:43:04,354 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=6848, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7385, PETRI_PLACES=198, PETRI_TRANSITIONS=399} [2022-01-19 08:43:04,354 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 112 predicate places. [2022-01-19 08:43:04,354 INFO L470 AbstractCegarLoop]: Abstraction has has 198 places, 399 transitions, 7385 flow [2022-01-19 08:43:04,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:43:04,355 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:43:04,355 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:43:04,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-19 08:43:04,355 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 08:43:04,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:43:04,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1727722086, now seen corresponding path program 8 times [2022-01-19 08:43:04,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:43:04,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198032263] [2022-01-19 08:43:04,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:43:04,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:43:04,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:43:04,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:43:04,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:43:04,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198032263] [2022-01-19 08:43:04,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198032263] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:43:04,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:43:04,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 08:43:04,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558104334] [2022-01-19 08:43:04,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:43:04,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 08:43:04,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:43:04,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 08:43:04,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-19 08:43:04,435 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-01-19 08:43:04,436 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 399 transitions, 7385 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:43:04,436 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:43:04,436 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-01-19 08:43:04,436 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:43:05,617 INFO L129 PetriNetUnfolder]: 2775/6460 cut-off events. [2022-01-19 08:43:05,618 INFO L130 PetriNetUnfolder]: For 73749/73919 co-relation queries the response was YES. [2022-01-19 08:43:05,647 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36509 conditions, 6460 events. 2775/6460 cut-off events. For 73749/73919 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 57894 event pairs, 799 based on Foata normal form. 54/6334 useless extension candidates. Maximal degree in co-relation 36450. Up to 4237 conditions per place. [2022-01-19 08:43:05,672 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 264 selfloop transitions, 73 changer transitions 6/414 dead transitions. [2022-01-19 08:43:05,672 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 414 transitions, 8153 flow [2022-01-19 08:43:05,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 08:43:05,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 08:43:05,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 470 transitions. [2022-01-19 08:43:05,673 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8075601374570447 [2022-01-19 08:43:05,674 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 470 transitions. [2022-01-19 08:43:05,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 470 transitions. [2022-01-19 08:43:05,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:43:05,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 470 transitions. [2022-01-19 08:43:05,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 78.33333333333333) internal successors, (470), 6 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:43:05,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:43:05,676 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:43:05,676 INFO L186 Difference]: Start difference. First operand has 198 places, 399 transitions, 7385 flow. Second operand 6 states and 470 transitions. [2022-01-19 08:43:05,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 414 transitions, 8153 flow [2022-01-19 08:43:05,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 414 transitions, 8089 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-01-19 08:43:05,831 INFO L242 Difference]: Finished difference. Result has 203 places, 398 transitions, 7406 flow [2022-01-19 08:43:05,831 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=7203, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7406, PETRI_PLACES=203, PETRI_TRANSITIONS=398} [2022-01-19 08:43:05,832 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 117 predicate places. [2022-01-19 08:43:05,832 INFO L470 AbstractCegarLoop]: Abstraction has has 203 places, 398 transitions, 7406 flow [2022-01-19 08:43:05,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:43:05,832 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:43:05,832 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:43:05,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-19 08:43:05,832 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 08:43:05,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:43:05,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1741852028, now seen corresponding path program 9 times [2022-01-19 08:43:05,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:43:05,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025761213] [2022-01-19 08:43:05,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:43:05,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:43:05,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:43:05,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:43:05,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:43:05,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025761213] [2022-01-19 08:43:05,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025761213] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:43:05,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:43:05,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 08:43:05,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404691292] [2022-01-19 08:43:05,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:43:05,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 08:43:05,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:43:05,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 08:43:05,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-19 08:43:05,922 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-01-19 08:43:05,922 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 398 transitions, 7406 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:43:05,922 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:43:05,922 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-01-19 08:43:05,922 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:43:06,948 INFO L129 PetriNetUnfolder]: 2756/6325 cut-off events. [2022-01-19 08:43:06,948 INFO L130 PetriNetUnfolder]: For 77953/78126 co-relation queries the response was YES. [2022-01-19 08:43:06,987 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36374 conditions, 6325 events. 2756/6325 cut-off events. For 77953/78126 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 55857 event pairs, 836 based on Foata normal form. 57/6173 useless extension candidates. Maximal degree in co-relation 36313. Up to 4241 conditions per place. [2022-01-19 08:43:07,020 INFO L132 encePairwiseOnDemand]: 90/97 looper letters, 253 selfloop transitions, 76 changer transitions 3/403 dead transitions. [2022-01-19 08:43:07,020 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 403 transitions, 7974 flow [2022-01-19 08:43:07,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-19 08:43:07,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-01-19 08:43:07,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 398 transitions. [2022-01-19 08:43:07,021 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8206185567010309 [2022-01-19 08:43:07,021 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 398 transitions. [2022-01-19 08:43:07,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 398 transitions. [2022-01-19 08:43:07,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:43:07,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 398 transitions. [2022-01-19 08:43:07,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 79.6) internal successors, (398), 5 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:43:07,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:43:07,024 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:43:07,024 INFO L186 Difference]: Start difference. First operand has 203 places, 398 transitions, 7406 flow. Second operand 5 states and 398 transitions. [2022-01-19 08:43:07,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 403 transitions, 7974 flow [2022-01-19 08:43:07,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 403 transitions, 7675 flow, removed 23 selfloop flow, removed 9 redundant places. [2022-01-19 08:43:07,194 INFO L242 Difference]: Finished difference. Result has 197 places, 390 transitions, 7103 flow [2022-01-19 08:43:07,195 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=6835, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=7103, PETRI_PLACES=197, PETRI_TRANSITIONS=390} [2022-01-19 08:43:07,195 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 111 predicate places. [2022-01-19 08:43:07,195 INFO L470 AbstractCegarLoop]: Abstraction has has 197 places, 390 transitions, 7103 flow [2022-01-19 08:43:07,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:43:07,195 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:43:07,195 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:43:07,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-19 08:43:07,196 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 08:43:07,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:43:07,196 INFO L85 PathProgramCache]: Analyzing trace with hash 2069702826, now seen corresponding path program 1 times [2022-01-19 08:43:07,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:43:07,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734787633] [2022-01-19 08:43:07,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:43:07,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:43:07,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:43:07,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:43:07,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:43:07,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734787633] [2022-01-19 08:43:07,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734787633] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:43:07,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657761862] [2022-01-19 08:43:07,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:43:07,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:43:07,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:43:07,412 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:43:07,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-19 08:43:07,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:43:07,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-19 08:43:07,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:43:08,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:43:08,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:43:09,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:43:09,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657761862] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:43:09,231 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:43:09,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 16 [2022-01-19 08:43:09,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924429441] [2022-01-19 08:43:09,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:43:09,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-19 08:43:09,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:43:09,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-19 08:43:09,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-19 08:43:09,233 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 97 [2022-01-19 08:43:09,234 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 390 transitions, 7103 flow. Second operand has 16 states, 16 states have (on average 67.3125) internal successors, (1077), 16 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:43:09,234 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:43:09,234 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 97 [2022-01-19 08:43:09,234 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:43:10,542 INFO L129 PetriNetUnfolder]: 2379/6531 cut-off events. [2022-01-19 08:43:10,542 INFO L130 PetriNetUnfolder]: For 77316/77938 co-relation queries the response was YES. [2022-01-19 08:43:10,575 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36000 conditions, 6531 events. 2379/6531 cut-off events. For 77316/77938 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 63821 event pairs, 282 based on Foata normal form. 252/6634 useless extension candidates. Maximal degree in co-relation 35943. Up to 2576 conditions per place. [2022-01-19 08:43:10,600 INFO L132 encePairwiseOnDemand]: 84/97 looper letters, 246 selfloop transitions, 317 changer transitions 6/645 dead transitions. [2022-01-19 08:43:10,600 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 645 transitions, 12563 flow [2022-01-19 08:43:10,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-19 08:43:10,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-01-19 08:43:10,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 928 transitions. [2022-01-19 08:43:10,608 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7359238699444886 [2022-01-19 08:43:10,608 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 928 transitions. [2022-01-19 08:43:10,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 928 transitions. [2022-01-19 08:43:10,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:43:10,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 928 transitions. [2022-01-19 08:43:10,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 71.38461538461539) internal successors, (928), 13 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:43:10,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 97.0) internal successors, (1358), 14 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:43:10,614 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 97.0) internal successors, (1358), 14 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:43:10,615 INFO L186 Difference]: Start difference. First operand has 197 places, 390 transitions, 7103 flow. Second operand 13 states and 928 transitions. [2022-01-19 08:43:10,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 645 transitions, 12563 flow [2022-01-19 08:43:10,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 645 transitions, 12373 flow, removed 12 selfloop flow, removed 7 redundant places. [2022-01-19 08:43:10,805 INFO L242 Difference]: Finished difference. Result has 202 places, 536 transitions, 10308 flow [2022-01-19 08:43:10,806 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=6913, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10308, PETRI_PLACES=202, PETRI_TRANSITIONS=536} [2022-01-19 08:43:10,806 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 116 predicate places. [2022-01-19 08:43:10,806 INFO L470 AbstractCegarLoop]: Abstraction has has 202 places, 536 transitions, 10308 flow [2022-01-19 08:43:10,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 67.3125) internal successors, (1077), 16 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:43:10,807 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:43:10,807 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:43:10,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-19 08:43:11,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:43:11,027 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 08:43:11,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:43:11,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1920456064, now seen corresponding path program 2 times [2022-01-19 08:43:11,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:43:11,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566801343] [2022-01-19 08:43:11,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:43:11,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:43:11,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:43:11,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:43:11,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:43:11,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566801343] [2022-01-19 08:43:11,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566801343] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:43:11,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851691441] [2022-01-19 08:43:11,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:43:11,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:43:11,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:43:11,209 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:43:11,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-19 08:43:11,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:43:11,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:43:11,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-19 08:43:11,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:43:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:43:11,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:43:15,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:43:15,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851691441] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:43:15,989 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:43:15,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 19 [2022-01-19 08:43:15,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936813856] [2022-01-19 08:43:15,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:43:15,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 08:43:15,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:43:15,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 08:43:15,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-01-19 08:43:15,992 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 97 [2022-01-19 08:43:15,993 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 536 transitions, 10308 flow. Second operand has 19 states, 19 states have (on average 65.42105263157895) internal successors, (1243), 19 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:43:15,994 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:43:15,994 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 97 [2022-01-19 08:43:15,994 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:43:18,445 INFO L129 PetriNetUnfolder]: 4094/10933 cut-off events. [2022-01-19 08:43:18,446 INFO L130 PetriNetUnfolder]: For 125497/125753 co-relation queries the response was YES. [2022-01-19 08:43:18,506 INFO L84 FinitePrefix]: Finished finitePrefix Result has 62444 conditions, 10933 events. 4094/10933 cut-off events. For 125497/125753 co-relation queries the response was YES. Maximal size of possible extension queue 870. Compared 116416 event pairs, 302 based on Foata normal form. 165/10910 useless extension candidates. Maximal degree in co-relation 62385. Up to 3256 conditions per place. [2022-01-19 08:43:18,553 INFO L132 encePairwiseOnDemand]: 82/97 looper letters, 364 selfloop transitions, 448 changer transitions 9/881 dead transitions. [2022-01-19 08:43:18,553 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 881 transitions, 17699 flow [2022-01-19 08:43:18,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-19 08:43:18,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-01-19 08:43:18,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1262 transitions. [2022-01-19 08:43:18,555 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.722794959908362 [2022-01-19 08:43:18,555 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1262 transitions. [2022-01-19 08:43:18,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1262 transitions. [2022-01-19 08:43:18,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:43:18,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1262 transitions. [2022-01-19 08:43:18,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 70.11111111111111) internal successors, (1262), 18 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:43:18,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 97.0) internal successors, (1843), 19 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:43:18,559 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 97.0) internal successors, (1843), 19 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:43:18,559 INFO L186 Difference]: Start difference. First operand has 202 places, 536 transitions, 10308 flow. Second operand 18 states and 1262 transitions. [2022-01-19 08:43:18,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 881 transitions, 17699 flow [2022-01-19 08:43:18,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 881 transitions, 17168 flow, removed 230 selfloop flow, removed 4 redundant places. [2022-01-19 08:43:18,880 INFO L242 Difference]: Finished difference. Result has 218 places, 654 transitions, 13234 flow [2022-01-19 08:43:18,880 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=9841, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=353, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=13234, PETRI_PLACES=218, PETRI_TRANSITIONS=654} [2022-01-19 08:43:18,881 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 132 predicate places. [2022-01-19 08:43:18,881 INFO L470 AbstractCegarLoop]: Abstraction has has 218 places, 654 transitions, 13234 flow [2022-01-19 08:43:18,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.42105263157895) internal successors, (1243), 19 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:43:18,881 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:43:18,882 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:43:18,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-19 08:43:19,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:43:19,083 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 08:43:19,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:43:19,084 INFO L85 PathProgramCache]: Analyzing trace with hash 2081286502, now seen corresponding path program 3 times [2022-01-19 08:43:19,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:43:19,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136857645] [2022-01-19 08:43:19,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:43:19,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:43:19,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:43:19,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:43:19,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:43:19,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136857645] [2022-01-19 08:43:19,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136857645] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:43:19,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516296717] [2022-01-19 08:43:19,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 08:43:19,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:43:19,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:43:19,270 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:43:19,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-19 08:43:19,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 08:43:19,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:43:19,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-19 08:43:19,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:43:19,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:43:19,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2022-01-19 08:57:02,769 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 08:57:02,770 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 08:57:02,812 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-01-19 08:57:02,813 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2022-01-19 08:57:02,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-19 08:57:03,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:57:03,015 WARN L594 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 76 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 15 for 69ms.. [2022-01-19 08:57:03,016 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-01-19 08:57:03,017 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-01-19 08:57:03,017 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-01-19 08:57:03,019 INFO L732 BasicCegarLoop]: Path program histogram: [9, 4, 4, 3, 1, 1] [2022-01-19 08:57:03,021 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-19 08:57:03,021 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-19 08:57:03,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.01 08:57:03 BasicIcfg [2022-01-19 08:57:03,023 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-19 08:57:03,023 INFO L158 Benchmark]: Toolchain (without parser) took 857419.91ms. Allocated memory was 383.8MB in the beginning and 8.0GB in the end (delta: 7.6GB). Free memory was 325.7MB in the beginning and 4.5GB in the end (delta: -4.2GB). Peak memory consumption was 3.4GB. Max. memory is 16.0GB. [2022-01-19 08:57:03,024 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 383.8MB. Free memory is still 342.1MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 08:57:03,024 INFO L158 Benchmark]: CACSL2BoogieTranslator took 223.46ms. Allocated memory was 383.8MB in the beginning and 503.3MB in the end (delta: 119.5MB). Free memory was 325.6MB in the beginning and 471.9MB in the end (delta: -146.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. [2022-01-19 08:57:03,024 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.33ms. Allocated memory is still 503.3MB. Free memory was 471.9MB in the beginning and 470.8MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 08:57:03,024 INFO L158 Benchmark]: Boogie Preprocessor took 30.61ms. Allocated memory is still 503.3MB. Free memory was 470.8MB in the beginning and 469.8MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 08:57:03,025 INFO L158 Benchmark]: RCFGBuilder took 408.51ms. Allocated memory is still 503.3MB. Free memory was 468.7MB in the beginning and 454.1MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2022-01-19 08:57:03,025 INFO L158 Benchmark]: TraceAbstraction took 856718.38ms. Allocated memory was 503.3MB in the beginning and 8.0GB in the end (delta: 7.5GB). Free memory was 453.0MB in the beginning and 4.5GB in the end (delta: -4.1GB). Peak memory consumption was 3.4GB. Max. memory is 16.0GB. [2022-01-19 08:57:03,026 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 383.8MB. Free memory is still 342.1MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 223.46ms. Allocated memory was 383.8MB in the beginning and 503.3MB in the end (delta: 119.5MB). Free memory was 325.6MB in the beginning and 471.9MB in the end (delta: -146.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 34.33ms. Allocated memory is still 503.3MB. Free memory was 471.9MB in the beginning and 470.8MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 30.61ms. Allocated memory is still 503.3MB. Free memory was 470.8MB in the beginning and 469.8MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 408.51ms. Allocated memory is still 503.3MB. Free memory was 468.7MB in the beginning and 454.1MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 856718.38ms. Allocated memory was 503.3MB in the beginning and 8.0GB in the end (delta: 7.5GB). Free memory was 453.0MB in the beginning and 4.5GB in the end (delta: -4.1GB). Peak memory consumption was 3.4GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 105]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 76 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 15 for 69ms.. - TimeoutResultAtElement [Line: 97]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 76 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 15 for 69ms.. - TimeoutResultAtElement [Line: 98]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 76 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 15 for 69ms.. - TimeoutResultAtElement [Line: 99]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 76 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 15 for 69ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 113 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 856.6s, OverallIterations: 22, TraceHistogramMax: 1, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 19.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 967 SdHoareTripleChecker+Valid, 2.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 967 mSDsluCounter, 899 SdHoareTripleChecker+Invalid, 2.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 144 IncrementalHoareTripleChecker+Unchecked, 1385 mSDsCounter, 145 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2812 IncrementalHoareTripleChecker+Invalid, 3101 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 145 mSolverCounterUnsat, 237 mSDtfsCounter, 2812 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 781 GetRequests, 599 SyntacticMatches, 10 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 4.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13234occurred in iteration=21, InterpolantAutomatonStates: 158, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 10.5s InterpolantComputationTime, 1896 NumberOfCodeBlocks, 1896 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 2090 ConstructedInterpolants, 27 QuantifiedInterpolants, 15204 SizeOfPredicates, 32 NumberOfNonLiveVariables, 970 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 29 InterpolantComputations, 18 PerfectInterpolantSequences, 16/33 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown