./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e8ee20bd48f38d06d172550f7b4afad7a85599a8fd397bba890e4eeccd52db93 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 20:29:42,866 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 20:29:42,867 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 20:29:42,901 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 20:29:42,901 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 20:29:42,902 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 20:29:42,903 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 20:29:42,904 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 20:29:42,905 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 20:29:42,906 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 20:29:42,906 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 20:29:42,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 20:29:42,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 20:29:42,908 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 20:29:42,909 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 20:29:42,910 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 20:29:42,910 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 20:29:42,911 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 20:29:42,912 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 20:29:42,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 20:29:42,915 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 20:29:42,920 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 20:29:42,922 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 20:29:42,924 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 20:29:42,926 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 20:29:42,933 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 20:29:42,937 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 20:29:42,938 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 20:29:42,939 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 20:29:42,940 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 20:29:42,941 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 20:29:42,941 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 20:29:42,942 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 20:29:42,942 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 20:29:42,943 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 20:29:42,944 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 20:29:42,945 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 20:29:42,946 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 20:29:42,946 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 20:29:42,946 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 20:29:42,947 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 20:29:42,947 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 20:29:42,949 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 20:29:42,965 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 20:29:42,967 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 20:29:42,967 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 20:29:42,967 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 20:29:42,968 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 20:29:42,968 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 20:29:42,968 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 20:29:42,969 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 20:29:42,969 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 20:29:42,969 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 20:29:42,970 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 20:29:42,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 20:29:42,970 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 20:29:42,970 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 20:29:42,970 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 20:29:42,970 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 20:29:42,970 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 20:29:42,971 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 20:29:42,971 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 20:29:42,971 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 20:29:42,971 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 20:29:42,971 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 20:29:42,972 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 20:29:42,972 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 20:29:42,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 20:29:42,972 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 20:29:42,972 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 20:29:42,972 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 20:29:42,973 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 20:29:42,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 20:29:42,973 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 20:29:42,973 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 20:29:42,973 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 20:29:42,973 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e8ee20bd48f38d06d172550f7b4afad7a85599a8fd397bba890e4eeccd52db93 [2022-07-19 20:29:43,132 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 20:29:43,152 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 20:29:43,153 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 20:29:43,155 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 20:29:43,156 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 20:29:43,157 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c [2022-07-19 20:29:43,199 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1fa73c1e/4d1decfc41f44f64a9016fe88b03ce7f/FLAG73df2404c [2022-07-19 20:29:43,591 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 20:29:43,591 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c [2022-07-19 20:29:43,602 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1fa73c1e/4d1decfc41f44f64a9016fe88b03ce7f/FLAG73df2404c [2022-07-19 20:29:43,615 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1fa73c1e/4d1decfc41f44f64a9016fe88b03ce7f [2022-07-19 20:29:43,616 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 20:29:43,619 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 20:29:43,620 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 20:29:43,620 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 20:29:43,622 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 20:29:43,623 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 08:29:43" (1/1) ... [2022-07-19 20:29:43,623 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e0c9267 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:29:43, skipping insertion in model container [2022-07-19 20:29:43,624 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 08:29:43" (1/1) ... [2022-07-19 20:29:43,628 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 20:29:43,665 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 20:29:43,775 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c[913,926] [2022-07-19 20:29:43,803 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c[5977,5990] [2022-07-19 20:29:43,852 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 20:29:43,859 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 20:29:43,866 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c[913,926] [2022-07-19 20:29:43,875 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c[5977,5990] [2022-07-19 20:29:43,903 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 20:29:43,916 INFO L208 MainTranslator]: Completed translation [2022-07-19 20:29:43,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:29:43 WrapperNode [2022-07-19 20:29:43,917 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 20:29:43,918 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 20:29:43,918 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 20:29:43,918 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 20:29:43,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:29:43" (1/1) ... [2022-07-19 20:29:43,930 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:29:43" (1/1) ... [2022-07-19 20:29:43,978 INFO L137 Inliner]: procedures = 64, calls = 73, calls flagged for inlining = 38, calls inlined = 38, statements flattened = 828 [2022-07-19 20:29:43,979 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 20:29:43,979 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 20:29:43,979 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 20:29:43,979 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 20:29:43,985 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:29:43" (1/1) ... [2022-07-19 20:29:43,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:29:43" (1/1) ... [2022-07-19 20:29:43,994 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:29:43" (1/1) ... [2022-07-19 20:29:43,994 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:29:43" (1/1) ... [2022-07-19 20:29:44,002 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:29:43" (1/1) ... [2022-07-19 20:29:44,009 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:29:43" (1/1) ... [2022-07-19 20:29:44,011 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:29:43" (1/1) ... [2022-07-19 20:29:44,014 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 20:29:44,015 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 20:29:44,015 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 20:29:44,015 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 20:29:44,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:29:43" (1/1) ... [2022-07-19 20:29:44,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 20:29:44,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:29:44,051 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) [2022-07-19 20:29:44,057 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 [2022-07-19 20:29:44,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 20:29:44,078 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-07-19 20:29:44,078 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-07-19 20:29:44,078 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-07-19 20:29:44,078 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-07-19 20:29:44,078 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-07-19 20:29:44,079 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-07-19 20:29:44,079 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-07-19 20:29:44,079 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-07-19 20:29:44,079 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-07-19 20:29:44,079 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-07-19 20:29:44,079 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-07-19 20:29:44,079 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-07-19 20:29:44,079 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-07-19 20:29:44,080 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-07-19 20:29:44,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 20:29:44,080 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-07-19 20:29:44,080 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-07-19 20:29:44,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 20:29:44,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 20:29:44,080 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-07-19 20:29:44,081 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-07-19 20:29:44,081 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-07-19 20:29:44,081 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-07-19 20:29:44,154 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 20:29:44,155 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 20:29:44,651 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 20:29:44,659 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 20:29:44,659 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2022-07-19 20:29:44,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 08:29:44 BoogieIcfgContainer [2022-07-19 20:29:44,661 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 20:29:44,664 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 20:29:44,664 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 20:29:44,666 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 20:29:44,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 08:29:43" (1/3) ... [2022-07-19 20:29:44,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b31715 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 08:29:44, skipping insertion in model container [2022-07-19 20:29:44,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:29:43" (2/3) ... [2022-07-19 20:29:44,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b31715 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 08:29:44, skipping insertion in model container [2022-07-19 20:29:44,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 08:29:44" (3/3) ... [2022-07-19 20:29:44,669 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.08.cil-2.c [2022-07-19 20:29:44,678 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 20:29:44,678 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-19 20:29:44,719 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 20:29:44,723 INFO L357 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=true, 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@60da25e1, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2a368ab1 [2022-07-19 20:29:44,723 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 20:29:44,727 INFO L276 IsEmpty]: Start isEmpty. Operand has 362 states, 319 states have (on average 1.6363636363636365) internal successors, (522), 326 states have internal predecessors, (522), 30 states have call successors, (30), 10 states have call predecessors, (30), 10 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2022-07-19 20:29:44,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-19 20:29:44,734 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:44,734 INFO L195 NwaCegarLoop]: 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] [2022-07-19 20:29:44,735 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:44,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:44,738 INFO L85 PathProgramCache]: Analyzing trace with hash 975789426, now seen corresponding path program 1 times [2022-07-19 20:29:44,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:44,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306115509] [2022-07-19 20:29:44,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:44,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:44,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:44,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:29:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:44,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 20:29:44,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:44,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:44,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:44,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306115509] [2022-07-19 20:29:44,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306115509] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:44,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:44,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 20:29:44,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285318598] [2022-07-19 20:29:44,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:44,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 20:29:44,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:44,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 20:29:44,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 20:29:44,899 INFO L87 Difference]: Start difference. First operand has 362 states, 319 states have (on average 1.6363636363636365) internal successors, (522), 326 states have internal predecessors, (522), 30 states have call successors, (30), 10 states have call predecessors, (30), 10 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 20:29:45,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:45,260 INFO L93 Difference]: Finished difference Result 710 states and 1139 transitions. [2022-07-19 20:29:45,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 20:29:45,263 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2022-07-19 20:29:45,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:45,278 INFO L225 Difference]: With dead ends: 710 [2022-07-19 20:29:45,278 INFO L226 Difference]: Without dead ends: 360 [2022-07-19 20:29:45,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 20:29:45,288 INFO L413 NwaCegarLoop]: 550 mSDtfsCounter, 307 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:45,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 1055 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 20:29:45,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-07-19 20:29:45,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 351. [2022-07-19 20:29:45,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 311 states have (on average 1.540192926045016) internal successors, (479), 315 states have internal predecessors, (479), 30 states have call successors, (30), 10 states have call predecessors, (30), 8 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-07-19 20:29:45,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 535 transitions. [2022-07-19 20:29:45,330 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 535 transitions. Word has length 44 [2022-07-19 20:29:45,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:45,330 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 535 transitions. [2022-07-19 20:29:45,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 20:29:45,331 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 535 transitions. [2022-07-19 20:29:45,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-19 20:29:45,332 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:45,333 INFO L195 NwaCegarLoop]: 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] [2022-07-19 20:29:45,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 20:29:45,333 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:45,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:45,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1473810704, now seen corresponding path program 1 times [2022-07-19 20:29:45,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:45,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607817254] [2022-07-19 20:29:45,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:45,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:45,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:45,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:29:45,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:45,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 20:29:45,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:45,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:45,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:45,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607817254] [2022-07-19 20:29:45,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607817254] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:45,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:45,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 20:29:45,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994347906] [2022-07-19 20:29:45,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:45,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 20:29:45,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:45,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 20:29:45,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 20:29:45,409 INFO L87 Difference]: Start difference. First operand 351 states and 535 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 20:29:45,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:45,566 INFO L93 Difference]: Finished difference Result 483 states and 720 transitions. [2022-07-19 20:29:45,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 20:29:45,567 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-07-19 20:29:45,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:45,570 INFO L225 Difference]: With dead ends: 483 [2022-07-19 20:29:45,571 INFO L226 Difference]: Without dead ends: 421 [2022-07-19 20:29:45,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 20:29:45,573 INFO L413 NwaCegarLoop]: 548 mSDtfsCounter, 708 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:45,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [730 Valid, 882 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 20:29:45,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-07-19 20:29:45,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 415. [2022-07-19 20:29:45,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 368 states have (on average 1.5081521739130435) internal successors, (555), 373 states have internal predecessors, (555), 34 states have call successors, (34), 12 states have call predecessors, (34), 11 states have return successors, (36), 30 states have call predecessors, (36), 30 states have call successors, (36) [2022-07-19 20:29:45,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 625 transitions. [2022-07-19 20:29:45,598 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 625 transitions. Word has length 44 [2022-07-19 20:29:45,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:45,598 INFO L495 AbstractCegarLoop]: Abstraction has 415 states and 625 transitions. [2022-07-19 20:29:45,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 20:29:45,599 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 625 transitions. [2022-07-19 20:29:45,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-19 20:29:45,600 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:45,600 INFO L195 NwaCegarLoop]: 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] [2022-07-19 20:29:45,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 20:29:45,601 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:45,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:45,601 INFO L85 PathProgramCache]: Analyzing trace with hash 852707101, now seen corresponding path program 1 times [2022-07-19 20:29:45,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:45,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239875500] [2022-07-19 20:29:45,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:45,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:45,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:45,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:29:45,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:45,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 20:29:45,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:45,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:45,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:45,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239875500] [2022-07-19 20:29:45,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239875500] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:45,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:45,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 20:29:45,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45344535] [2022-07-19 20:29:45,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:45,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 20:29:45,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:45,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 20:29:45,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 20:29:45,670 INFO L87 Difference]: Start difference. First operand 415 states and 625 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 20:29:45,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:45,920 INFO L93 Difference]: Finished difference Result 663 states and 965 transitions. [2022-07-19 20:29:45,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 20:29:45,921 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-07-19 20:29:45,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:45,923 INFO L225 Difference]: With dead ends: 663 [2022-07-19 20:29:45,923 INFO L226 Difference]: Without dead ends: 539 [2022-07-19 20:29:45,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 20:29:45,925 INFO L413 NwaCegarLoop]: 581 mSDtfsCounter, 288 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 1159 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:45,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 1159 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 20:29:45,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-07-19 20:29:45,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 482. [2022-07-19 20:29:45,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 429 states have (on average 1.4895104895104896) internal successors, (639), 434 states have internal predecessors, (639), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (39), 33 states have call predecessors, (39), 33 states have call successors, (39) [2022-07-19 20:29:45,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 715 transitions. [2022-07-19 20:29:45,951 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 715 transitions. Word has length 45 [2022-07-19 20:29:45,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:45,952 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 715 transitions. [2022-07-19 20:29:45,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 20:29:45,953 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 715 transitions. [2022-07-19 20:29:45,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-19 20:29:45,960 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:45,960 INFO L195 NwaCegarLoop]: 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] [2022-07-19 20:29:45,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 20:29:45,960 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:45,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:45,961 INFO L85 PathProgramCache]: Analyzing trace with hash -431650360, now seen corresponding path program 1 times [2022-07-19 20:29:45,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:45,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802766209] [2022-07-19 20:29:45,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:45,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:45,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:46,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:29:46,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:46,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 20:29:46,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:46,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:46,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:46,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802766209] [2022-07-19 20:29:46,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802766209] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:46,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:46,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 20:29:46,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198831663] [2022-07-19 20:29:46,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:46,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 20:29:46,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:46,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 20:29:46,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 20:29:46,024 INFO L87 Difference]: Start difference. First operand 482 states and 715 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 20:29:46,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:46,134 INFO L93 Difference]: Finished difference Result 890 states and 1274 transitions. [2022-07-19 20:29:46,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 20:29:46,135 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-07-19 20:29:46,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:46,138 INFO L225 Difference]: With dead ends: 890 [2022-07-19 20:29:46,138 INFO L226 Difference]: Without dead ends: 699 [2022-07-19 20:29:46,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 20:29:46,140 INFO L413 NwaCegarLoop]: 556 mSDtfsCounter, 725 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:46,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [747 Valid, 902 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 20:29:46,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-07-19 20:29:46,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 647. [2022-07-19 20:29:46,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 575 states have (on average 1.4417391304347826) internal successors, (829), 583 states have internal predecessors, (829), 48 states have call successors, (48), 22 states have call predecessors, (48), 22 states have return successors, (56), 42 states have call predecessors, (56), 44 states have call successors, (56) [2022-07-19 20:29:46,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 933 transitions. [2022-07-19 20:29:46,162 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 933 transitions. Word has length 45 [2022-07-19 20:29:46,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:46,162 INFO L495 AbstractCegarLoop]: Abstraction has 647 states and 933 transitions. [2022-07-19 20:29:46,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 20:29:46,163 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 933 transitions. [2022-07-19 20:29:46,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-19 20:29:46,164 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:46,164 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:29:46,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 20:29:46,164 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:46,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:46,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1757585952, now seen corresponding path program 1 times [2022-07-19 20:29:46,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:46,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024896289] [2022-07-19 20:29:46,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:46,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:46,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:46,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:29:46,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:46,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 20:29:46,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:46,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 20:29:46,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:46,230 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 20:29:46,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:46,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024896289] [2022-07-19 20:29:46,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024896289] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:46,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:46,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 20:29:46,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246661700] [2022-07-19 20:29:46,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:46,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 20:29:46,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:46,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 20:29:46,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 20:29:46,232 INFO L87 Difference]: Start difference. First operand 647 states and 933 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 20:29:46,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:46,497 INFO L93 Difference]: Finished difference Result 991 states and 1394 transitions. [2022-07-19 20:29:46,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 20:29:46,498 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2022-07-19 20:29:46,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:46,501 INFO L225 Difference]: With dead ends: 991 [2022-07-19 20:29:46,501 INFO L226 Difference]: Without dead ends: 754 [2022-07-19 20:29:46,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 20:29:46,502 INFO L413 NwaCegarLoop]: 604 mSDtfsCounter, 272 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:46,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 1212 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 20:29:46,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-07-19 20:29:46,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 716. [2022-07-19 20:29:46,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 635 states have (on average 1.415748031496063) internal successors, (899), 644 states have internal predecessors, (899), 53 states have call successors, (53), 25 states have call predecessors, (53), 26 states have return successors, (65), 47 states have call predecessors, (65), 49 states have call successors, (65) [2022-07-19 20:29:46,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1017 transitions. [2022-07-19 20:29:46,520 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1017 transitions. Word has length 62 [2022-07-19 20:29:46,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:46,521 INFO L495 AbstractCegarLoop]: Abstraction has 716 states and 1017 transitions. [2022-07-19 20:29:46,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 20:29:46,521 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1017 transitions. [2022-07-19 20:29:46,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-19 20:29:46,522 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:46,522 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:29:46,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 20:29:46,523 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:46,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:46,523 INFO L85 PathProgramCache]: Analyzing trace with hash 2041601228, now seen corresponding path program 1 times [2022-07-19 20:29:46,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:46,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76831137] [2022-07-19 20:29:46,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:46,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:46,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:46,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:29:46,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:46,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 20:29:46,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:46,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-19 20:29:46,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:46,566 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 20:29:46,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:46,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76831137] [2022-07-19 20:29:46,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76831137] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:46,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:46,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 20:29:46,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224322615] [2022-07-19 20:29:46,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:46,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 20:29:46,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:46,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 20:29:46,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 20:29:46,568 INFO L87 Difference]: Start difference. First operand 716 states and 1017 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 20:29:46,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:46,674 INFO L93 Difference]: Finished difference Result 1267 states and 1739 transitions. [2022-07-19 20:29:46,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 20:29:46,675 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-07-19 20:29:46,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:46,678 INFO L225 Difference]: With dead ends: 1267 [2022-07-19 20:29:46,678 INFO L226 Difference]: Without dead ends: 889 [2022-07-19 20:29:46,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 20:29:46,679 INFO L413 NwaCegarLoop]: 551 mSDtfsCounter, 712 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:46,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [734 Valid, 899 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 20:29:46,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2022-07-19 20:29:46,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 834. [2022-07-19 20:29:46,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 740 states have (on average 1.385135135135135) internal successors, (1025), 750 states have internal predecessors, (1025), 60 states have call successors, (60), 30 states have call predecessors, (60), 32 states have return successors, (76), 54 states have call predecessors, (76), 56 states have call successors, (76) [2022-07-19 20:29:46,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1161 transitions. [2022-07-19 20:29:46,700 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1161 transitions. Word has length 67 [2022-07-19 20:29:46,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:46,701 INFO L495 AbstractCegarLoop]: Abstraction has 834 states and 1161 transitions. [2022-07-19 20:29:46,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 20:29:46,701 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1161 transitions. [2022-07-19 20:29:46,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-19 20:29:46,702 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:46,703 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:29:46,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 20:29:46,703 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:46,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:46,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1554818621, now seen corresponding path program 1 times [2022-07-19 20:29:46,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:46,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101304508] [2022-07-19 20:29:46,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:46,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:46,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:46,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:29:46,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:46,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 20:29:46,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:46,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 20:29:46,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:46,774 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:29:46,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:46,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101304508] [2022-07-19 20:29:46,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101304508] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:29:46,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405872079] [2022-07-19 20:29:46,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:46,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:29:46,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:29:46,777 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) [2022-07-19 20:29:46,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 20:29:46,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:46,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 20:29:46,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:29:46,970 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:46,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 20:29:47,009 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-19 20:29:47,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405872079] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 20:29:47,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 20:29:47,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2022-07-19 20:29:47,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128511390] [2022-07-19 20:29:47,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:47,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 20:29:47,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:47,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 20:29:47,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:29:47,012 INFO L87 Difference]: Start difference. First operand 834 states and 1161 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 20:29:47,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:47,114 INFO L93 Difference]: Finished difference Result 889 states and 1228 transitions. [2022-07-19 20:29:47,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 20:29:47,114 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2022-07-19 20:29:47,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:47,119 INFO L225 Difference]: With dead ends: 889 [2022-07-19 20:29:47,119 INFO L226 Difference]: Without dead ends: 886 [2022-07-19 20:29:47,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-19 20:29:47,121 INFO L413 NwaCegarLoop]: 560 mSDtfsCounter, 965 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 965 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:47,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [965 Valid, 627 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 20:29:47,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-07-19 20:29:47,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 833. [2022-07-19 20:29:47,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 740 states have (on average 1.3824324324324324) internal successors, (1023), 749 states have internal predecessors, (1023), 59 states have call successors, (59), 30 states have call predecessors, (59), 32 states have return successors, (76), 54 states have call predecessors, (76), 56 states have call successors, (76) [2022-07-19 20:29:47,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1158 transitions. [2022-07-19 20:29:47,155 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1158 transitions. Word has length 68 [2022-07-19 20:29:47,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:47,155 INFO L495 AbstractCegarLoop]: Abstraction has 833 states and 1158 transitions. [2022-07-19 20:29:47,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 20:29:47,156 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1158 transitions. [2022-07-19 20:29:47,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-19 20:29:47,157 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:47,158 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:29:47,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 20:29:47,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:29:47,372 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:47,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:47,372 INFO L85 PathProgramCache]: Analyzing trace with hash 953609583, now seen corresponding path program 1 times [2022-07-19 20:29:47,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:47,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690484148] [2022-07-19 20:29:47,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:47,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:47,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:47,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:29:47,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:47,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 20:29:47,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:47,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 20:29:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:47,447 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:29:47,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:47,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690484148] [2022-07-19 20:29:47,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690484148] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:29:47,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563949506] [2022-07-19 20:29:47,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:47,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:29:47,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:29:47,454 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) [2022-07-19 20:29:47,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 20:29:47,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:47,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 20:29:47,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:29:47,735 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:47,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 20:29:47,824 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-19 20:29:47,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563949506] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 20:29:47,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 20:29:47,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2022-07-19 20:29:47,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106873025] [2022-07-19 20:29:47,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 20:29:47,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 20:29:47,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:47,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 20:29:47,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-07-19 20:29:47,825 INFO L87 Difference]: Start difference. First operand 833 states and 1158 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-19 20:29:48,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:48,984 INFO L93 Difference]: Finished difference Result 2362 states and 3155 transitions. [2022-07-19 20:29:48,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-19 20:29:48,984 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2022-07-19 20:29:48,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:48,990 INFO L225 Difference]: With dead ends: 2362 [2022-07-19 20:29:48,991 INFO L226 Difference]: Without dead ends: 1918 [2022-07-19 20:29:48,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2022-07-19 20:29:48,993 INFO L413 NwaCegarLoop]: 665 mSDtfsCounter, 1079 mSDsluCounter, 2614 mSDsCounter, 0 mSdLazyCounter, 1561 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1108 SdHoareTripleChecker+Valid, 3279 SdHoareTripleChecker+Invalid, 1608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:48,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1108 Valid, 3279 Invalid, 1608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1561 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 20:29:48,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2022-07-19 20:29:49,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1207. [2022-07-19 20:29:49,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1078 states have (on average 1.3413729128014842) internal successors, (1446), 1093 states have internal predecessors, (1446), 78 states have call successors, (78), 43 states have call predecessors, (78), 49 states have return successors, (107), 71 states have call predecessors, (107), 75 states have call successors, (107) [2022-07-19 20:29:49,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 1631 transitions. [2022-07-19 20:29:49,039 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 1631 transitions. Word has length 69 [2022-07-19 20:29:49,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:49,040 INFO L495 AbstractCegarLoop]: Abstraction has 1207 states and 1631 transitions. [2022-07-19 20:29:49,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-19 20:29:49,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 1631 transitions. [2022-07-19 20:29:49,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-19 20:29:49,042 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:49,042 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:29:49,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 20:29:49,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-07-19 20:29:49,261 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:49,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:49,262 INFO L85 PathProgramCache]: Analyzing trace with hash 2034031846, now seen corresponding path program 1 times [2022-07-19 20:29:49,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:49,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977567809] [2022-07-19 20:29:49,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:49,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:49,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:49,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:29:49,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:49,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 20:29:49,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:49,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 20:29:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:49,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-19 20:29:49,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:49,308 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-19 20:29:49,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:49,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977567809] [2022-07-19 20:29:49,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977567809] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:29:49,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190048184] [2022-07-19 20:29:49,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:49,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:29:49,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:29:49,311 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) [2022-07-19 20:29:49,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 20:29:49,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:49,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 20:29:49,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:29:49,429 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-19 20:29:49,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 20:29:49,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190048184] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:49,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 20:29:49,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-19 20:29:49,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700919508] [2022-07-19 20:29:49,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:49,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:29:49,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:49,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:29:49,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:29:49,432 INFO L87 Difference]: Start difference. First operand 1207 states and 1631 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-19 20:29:49,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:49,479 INFO L93 Difference]: Finished difference Result 1851 states and 2469 transitions. [2022-07-19 20:29:49,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 20:29:49,480 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2022-07-19 20:29:49,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:49,483 INFO L225 Difference]: With dead ends: 1851 [2022-07-19 20:29:49,483 INFO L226 Difference]: Without dead ends: 1103 [2022-07-19 20:29:49,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:29:49,485 INFO L413 NwaCegarLoop]: 566 mSDtfsCounter, 496 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:49,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 640 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:29:49,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2022-07-19 20:29:49,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 1091. [2022-07-19 20:29:49,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1091 states, 975 states have (on average 1.3425641025641026) internal successors, (1309), 990 states have internal predecessors, (1309), 71 states have call successors, (71), 38 states have call predecessors, (71), 43 states have return successors, (96), 63 states have call predecessors, (96), 68 states have call successors, (96) [2022-07-19 20:29:49,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1476 transitions. [2022-07-19 20:29:49,517 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1476 transitions. Word has length 88 [2022-07-19 20:29:49,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:49,517 INFO L495 AbstractCegarLoop]: Abstraction has 1091 states and 1476 transitions. [2022-07-19 20:29:49,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-19 20:29:49,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1476 transitions. [2022-07-19 20:29:49,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-19 20:29:49,520 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:49,520 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:29:49,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 20:29:49,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:29:49,736 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:49,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:49,736 INFO L85 PathProgramCache]: Analyzing trace with hash 487728341, now seen corresponding path program 1 times [2022-07-19 20:29:49,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:49,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354870054] [2022-07-19 20:29:49,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:49,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:49,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:49,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:29:49,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:49,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 20:29:49,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:49,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 20:29:49,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:49,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-19 20:29:49,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:49,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-19 20:29:49,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:49,782 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-19 20:29:49,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:49,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354870054] [2022-07-19 20:29:49,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354870054] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:29:49,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582293525] [2022-07-19 20:29:49,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:49,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:29:49,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:29:49,791 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) [2022-07-19 20:29:49,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 20:29:49,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:49,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 20:29:49,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:29:49,893 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 20:29:49,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 20:29:49,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582293525] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:49,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 20:29:49,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-19 20:29:49,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280720340] [2022-07-19 20:29:49,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:49,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:29:49,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:49,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:29:49,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:29:49,895 INFO L87 Difference]: Start difference. First operand 1091 states and 1476 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-19 20:29:49,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:49,923 INFO L93 Difference]: Finished difference Result 1403 states and 1864 transitions. [2022-07-19 20:29:49,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 20:29:49,924 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2022-07-19 20:29:49,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:49,925 INFO L225 Difference]: With dead ends: 1403 [2022-07-19 20:29:49,925 INFO L226 Difference]: Without dead ends: 285 [2022-07-19 20:29:49,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:29:49,927 INFO L413 NwaCegarLoop]: 579 mSDtfsCounter, 61 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:49,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 1089 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:29:49,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-07-19 20:29:49,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2022-07-19 20:29:49,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 254 states have (on average 1.5669291338582678) internal successors, (398), 256 states have internal predecessors, (398), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-19 20:29:49,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 444 transitions. [2022-07-19 20:29:49,935 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 444 transitions. Word has length 103 [2022-07-19 20:29:49,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:49,935 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 444 transitions. [2022-07-19 20:29:49,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-19 20:29:49,935 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 444 transitions. [2022-07-19 20:29:49,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-19 20:29:49,936 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:49,936 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:29:49,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 20:29:50,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:29:50,147 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:50,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:50,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1195242880, now seen corresponding path program 1 times [2022-07-19 20:29:50,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:50,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023036903] [2022-07-19 20:29:50,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:50,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:50,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:50,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:50,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:50,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-19 20:29:50,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:50,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 20:29:50,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:50,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-19 20:29:50,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:50,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-19 20:29:50,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:50,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:50,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:50,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023036903] [2022-07-19 20:29:50,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023036903] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:50,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:50,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 20:29:50,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521548089] [2022-07-19 20:29:50,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:50,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 20:29:50,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:50,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 20:29:50,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 20:29:50,219 INFO L87 Difference]: Start difference. First operand 285 states and 444 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 20:29:50,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:50,887 INFO L93 Difference]: Finished difference Result 659 states and 1044 transitions. [2022-07-19 20:29:50,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 20:29:50,888 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2022-07-19 20:29:50,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:50,890 INFO L225 Difference]: With dead ends: 659 [2022-07-19 20:29:50,890 INFO L226 Difference]: Without dead ends: 383 [2022-07-19 20:29:50,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:29:50,891 INFO L413 NwaCegarLoop]: 485 mSDtfsCounter, 742 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:50,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [762 Valid, 791 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 20:29:50,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-07-19 20:29:50,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 285. [2022-07-19 20:29:50,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 254 states have (on average 1.562992125984252) internal successors, (397), 256 states have internal predecessors, (397), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-19 20:29:50,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 443 transitions. [2022-07-19 20:29:50,902 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 443 transitions. Word has length 135 [2022-07-19 20:29:50,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:50,902 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 443 transitions. [2022-07-19 20:29:50,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 20:29:50,903 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 443 transitions. [2022-07-19 20:29:50,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-19 20:29:50,903 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:50,904 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:29:50,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 20:29:50,904 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:50,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:50,904 INFO L85 PathProgramCache]: Analyzing trace with hash -488646274, now seen corresponding path program 1 times [2022-07-19 20:29:50,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:50,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588373221] [2022-07-19 20:29:50,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:50,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:50,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:50,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:50,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-19 20:29:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:50,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 20:29:50,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:50,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-19 20:29:50,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:50,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-19 20:29:50,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:50,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:50,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:50,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588373221] [2022-07-19 20:29:50,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588373221] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:50,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:50,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 20:29:50,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819451912] [2022-07-19 20:29:50,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:50,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 20:29:50,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:50,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 20:29:50,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 20:29:50,991 INFO L87 Difference]: Start difference. First operand 285 states and 443 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 20:29:52,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:52,360 INFO L93 Difference]: Finished difference Result 1027 states and 1634 transitions. [2022-07-19 20:29:52,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 20:29:52,361 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2022-07-19 20:29:52,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:52,364 INFO L225 Difference]: With dead ends: 1027 [2022-07-19 20:29:52,364 INFO L226 Difference]: Without dead ends: 759 [2022-07-19 20:29:52,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-07-19 20:29:52,365 INFO L413 NwaCegarLoop]: 521 mSDtfsCounter, 1109 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 1435 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1124 SdHoareTripleChecker+Valid, 1254 SdHoareTripleChecker+Invalid, 1543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:52,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1124 Valid, 1254 Invalid, 1543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1435 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-19 20:29:52,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2022-07-19 20:29:52,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 562. [2022-07-19 20:29:52,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 507 states have (on average 1.5759368836291914) internal successors, (799), 510 states have internal predecessors, (799), 41 states have call successors, (41), 13 states have call predecessors, (41), 13 states have return successors, (42), 39 states have call predecessors, (42), 39 states have call successors, (42) [2022-07-19 20:29:52,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 882 transitions. [2022-07-19 20:29:52,388 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 882 transitions. Word has length 135 [2022-07-19 20:29:52,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:52,388 INFO L495 AbstractCegarLoop]: Abstraction has 562 states and 882 transitions. [2022-07-19 20:29:52,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 20:29:52,389 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 882 transitions. [2022-07-19 20:29:52,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-19 20:29:52,389 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:52,390 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:29:52,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 20:29:52,390 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:52,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:52,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1850648710, now seen corresponding path program 1 times [2022-07-19 20:29:52,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:52,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464042136] [2022-07-19 20:29:52,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:52,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:52,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:52,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:52,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:52,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-19 20:29:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:52,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 20:29:52,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:52,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-19 20:29:52,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:52,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-19 20:29:52,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:52,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:52,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:52,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464042136] [2022-07-19 20:29:52,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464042136] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:52,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:52,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:29:52,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802114604] [2022-07-19 20:29:52,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:52,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:29:52,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:52,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:29:52,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:29:52,487 INFO L87 Difference]: Start difference. First operand 562 states and 882 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 20:29:54,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:54,271 INFO L93 Difference]: Finished difference Result 1690 states and 2692 transitions. [2022-07-19 20:29:54,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 20:29:54,272 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2022-07-19 20:29:54,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:54,275 INFO L225 Difference]: With dead ends: 1690 [2022-07-19 20:29:54,275 INFO L226 Difference]: Without dead ends: 1145 [2022-07-19 20:29:54,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-19 20:29:54,277 INFO L413 NwaCegarLoop]: 746 mSDtfsCounter, 1120 mSDsluCounter, 1447 mSDsCounter, 0 mSdLazyCounter, 2237 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1135 SdHoareTripleChecker+Valid, 2193 SdHoareTripleChecker+Invalid, 2308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 2237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:54,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1135 Valid, 2193 Invalid, 2308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 2237 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-19 20:29:54,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2022-07-19 20:29:54,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 820. [2022-07-19 20:29:54,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 741 states have (on average 1.5695006747638327) internal successors, (1163), 745 states have internal predecessors, (1163), 58 states have call successors, (58), 19 states have call predecessors, (58), 20 states have return successors, (61), 57 states have call predecessors, (61), 56 states have call successors, (61) [2022-07-19 20:29:54,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1282 transitions. [2022-07-19 20:29:54,315 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1282 transitions. Word has length 135 [2022-07-19 20:29:54,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:54,316 INFO L495 AbstractCegarLoop]: Abstraction has 820 states and 1282 transitions. [2022-07-19 20:29:54,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 20:29:54,316 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1282 transitions. [2022-07-19 20:29:54,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-19 20:29:54,317 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:54,318 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:29:54,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 20:29:54,318 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:54,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:54,318 INFO L85 PathProgramCache]: Analyzing trace with hash 78283516, now seen corresponding path program 1 times [2022-07-19 20:29:54,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:54,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305144009] [2022-07-19 20:29:54,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:54,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:54,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:54,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:54,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:54,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-19 20:29:54,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:54,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 20:29:54,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:54,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-19 20:29:54,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:54,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-19 20:29:54,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:54,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:54,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:54,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305144009] [2022-07-19 20:29:54,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305144009] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:54,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:54,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:29:54,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673326018] [2022-07-19 20:29:54,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:54,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:29:54,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:54,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:29:54,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:29:54,422 INFO L87 Difference]: Start difference. First operand 820 states and 1282 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 20:29:56,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:56,223 INFO L93 Difference]: Finished difference Result 2667 states and 4240 transitions. [2022-07-19 20:29:56,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 20:29:56,224 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2022-07-19 20:29:56,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:56,233 INFO L225 Difference]: With dead ends: 2667 [2022-07-19 20:29:56,234 INFO L226 Difference]: Without dead ends: 1864 [2022-07-19 20:29:56,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-19 20:29:56,236 INFO L413 NwaCegarLoop]: 738 mSDtfsCounter, 1117 mSDsluCounter, 1447 mSDsCounter, 0 mSdLazyCounter, 2239 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1132 SdHoareTripleChecker+Valid, 2185 SdHoareTripleChecker+Invalid, 2313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:56,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1132 Valid, 2185 Invalid, 2313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2239 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-19 20:29:56,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2022-07-19 20:29:56,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1337. [2022-07-19 20:29:56,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1210 states have (on average 1.5636363636363637) internal successors, (1892), 1216 states have internal predecessors, (1892), 92 states have call successors, (92), 31 states have call predecessors, (92), 34 states have return successors, (103), 93 states have call predecessors, (103), 90 states have call successors, (103) [2022-07-19 20:29:56,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 2087 transitions. [2022-07-19 20:29:56,294 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 2087 transitions. Word has length 135 [2022-07-19 20:29:56,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:56,294 INFO L495 AbstractCegarLoop]: Abstraction has 1337 states and 2087 transitions. [2022-07-19 20:29:56,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 20:29:56,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 2087 transitions. [2022-07-19 20:29:56,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-19 20:29:56,295 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:56,296 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:29:56,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 20:29:56,296 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:56,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:56,296 INFO L85 PathProgramCache]: Analyzing trace with hash 2080169786, now seen corresponding path program 1 times [2022-07-19 20:29:56,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:56,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138911935] [2022-07-19 20:29:56,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:56,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:56,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:56,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:56,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:56,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-19 20:29:56,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:56,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 20:29:56,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:56,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-19 20:29:56,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:56,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-19 20:29:56,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:56,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:56,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:56,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138911935] [2022-07-19 20:29:56,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138911935] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:56,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:56,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:29:56,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288850283] [2022-07-19 20:29:56,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:56,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:29:56,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:56,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:29:56,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:29:56,387 INFO L87 Difference]: Start difference. First operand 1337 states and 2087 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 20:29:58,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:58,218 INFO L93 Difference]: Finished difference Result 4548 states and 7205 transitions. [2022-07-19 20:29:58,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 20:29:58,219 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2022-07-19 20:29:58,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:58,233 INFO L225 Difference]: With dead ends: 4548 [2022-07-19 20:29:58,234 INFO L226 Difference]: Without dead ends: 3228 [2022-07-19 20:29:58,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-19 20:29:58,242 INFO L413 NwaCegarLoop]: 734 mSDtfsCounter, 1113 mSDsluCounter, 1447 mSDsCounter, 0 mSdLazyCounter, 2234 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1128 SdHoareTripleChecker+Valid, 2181 SdHoareTripleChecker+Invalid, 2308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:58,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1128 Valid, 2181 Invalid, 2308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2234 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-19 20:29:58,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3228 states. [2022-07-19 20:29:58,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3228 to 2372. [2022-07-19 20:29:58,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2372 states, 2149 states have (on average 1.5588645881805492) internal successors, (3350), 2159 states have internal predecessors, (3350), 160 states have call successors, (160), 55 states have call predecessors, (160), 62 states have return successors, (193), 165 states have call predecessors, (193), 158 states have call successors, (193) [2022-07-19 20:29:58,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 3703 transitions. [2022-07-19 20:29:58,373 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 3703 transitions. Word has length 135 [2022-07-19 20:29:58,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:58,373 INFO L495 AbstractCegarLoop]: Abstraction has 2372 states and 3703 transitions. [2022-07-19 20:29:58,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 20:29:58,374 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 3703 transitions. [2022-07-19 20:29:58,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-19 20:29:58,376 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:58,376 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:29:58,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 20:29:58,376 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:58,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:58,377 INFO L85 PathProgramCache]: Analyzing trace with hash -487652548, now seen corresponding path program 1 times [2022-07-19 20:29:58,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:58,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637320282] [2022-07-19 20:29:58,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:58,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:58,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:58,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:58,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:58,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-19 20:29:58,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:58,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 20:29:58,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:58,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-19 20:29:58,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:58,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-19 20:29:58,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:58,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:29:58,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:58,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637320282] [2022-07-19 20:29:58,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637320282] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:58,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:58,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:29:58,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090881495] [2022-07-19 20:29:58,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:58,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:29:58,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:58,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:29:58,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:29:58,462 INFO L87 Difference]: Start difference. First operand 2372 states and 3703 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 20:30:00,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:30:00,386 INFO L93 Difference]: Finished difference Result 8309 states and 13151 transitions. [2022-07-19 20:30:00,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 20:30:00,387 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2022-07-19 20:30:00,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:30:00,405 INFO L225 Difference]: With dead ends: 8309 [2022-07-19 20:30:00,406 INFO L226 Difference]: Without dead ends: 5954 [2022-07-19 20:30:00,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-19 20:30:00,411 INFO L413 NwaCegarLoop]: 730 mSDtfsCounter, 1109 mSDsluCounter, 1447 mSDsCounter, 0 mSdLazyCounter, 2229 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1124 SdHoareTripleChecker+Valid, 2177 SdHoareTripleChecker+Invalid, 2303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-19 20:30:00,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1124 Valid, 2177 Invalid, 2303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2229 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-19 20:30:00,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5954 states. [2022-07-19 20:30:00,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5954 to 4447. [2022-07-19 20:30:00,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4447 states, 4032 states have (on average 1.5555555555555556) internal successors, (6272), 4050 states have internal predecessors, (6272), 296 states have call successors, (296), 103 states have call predecessors, (296), 118 states have return successors, (391), 309 states have call predecessors, (391), 294 states have call successors, (391) [2022-07-19 20:30:00,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4447 states to 4447 states and 6959 transitions. [2022-07-19 20:30:00,656 INFO L78 Accepts]: Start accepts. Automaton has 4447 states and 6959 transitions. Word has length 135 [2022-07-19 20:30:00,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:30:00,656 INFO L495 AbstractCegarLoop]: Abstraction has 4447 states and 6959 transitions. [2022-07-19 20:30:00,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 20:30:00,656 INFO L276 IsEmpty]: Start isEmpty. Operand 4447 states and 6959 transitions. [2022-07-19 20:30:00,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-19 20:30:00,659 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:30:00,659 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:30:00,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 20:30:00,659 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:30:00,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:30:00,660 INFO L85 PathProgramCache]: Analyzing trace with hash -16296198, now seen corresponding path program 1 times [2022-07-19 20:30:00,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:30:00,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402244373] [2022-07-19 20:30:00,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:30:00,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:30:00,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:00,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:30:00,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:00,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-19 20:30:00,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:00,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 20:30:00,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:00,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-19 20:30:00,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:00,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-19 20:30:00,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:00,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:30:00,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:30:00,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402244373] [2022-07-19 20:30:00,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402244373] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:30:00,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:30:00,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:30:00,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487370869] [2022-07-19 20:30:00,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:30:00,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:30:00,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:30:00,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:30:00,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:30:00,746 INFO L87 Difference]: Start difference. First operand 4447 states and 6959 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 20:30:01,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:30:01,772 INFO L93 Difference]: Finished difference Result 10448 states and 16604 transitions. [2022-07-19 20:30:01,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 20:30:01,773 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2022-07-19 20:30:01,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:30:01,791 INFO L225 Difference]: With dead ends: 10448 [2022-07-19 20:30:01,792 INFO L226 Difference]: Without dead ends: 6018 [2022-07-19 20:30:01,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-19 20:30:01,801 INFO L413 NwaCegarLoop]: 460 mSDtfsCounter, 926 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 942 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 20:30:01,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [942 Valid, 1023 Invalid, 1037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 935 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 20:30:01,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6018 states. [2022-07-19 20:30:02,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6018 to 4447. [2022-07-19 20:30:02,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4447 states, 4032 states have (on average 1.5513392857142858) internal successors, (6255), 4050 states have internal predecessors, (6255), 296 states have call successors, (296), 103 states have call predecessors, (296), 118 states have return successors, (391), 309 states have call predecessors, (391), 294 states have call successors, (391) [2022-07-19 20:30:02,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4447 states to 4447 states and 6942 transitions. [2022-07-19 20:30:02,056 INFO L78 Accepts]: Start accepts. Automaton has 4447 states and 6942 transitions. Word has length 135 [2022-07-19 20:30:02,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:30:02,056 INFO L495 AbstractCegarLoop]: Abstraction has 4447 states and 6942 transitions. [2022-07-19 20:30:02,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 20:30:02,057 INFO L276 IsEmpty]: Start isEmpty. Operand 4447 states and 6942 transitions. [2022-07-19 20:30:02,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-19 20:30:02,060 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:30:02,060 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:30:02,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-19 20:30:02,060 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:30:02,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:30:02,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1663659140, now seen corresponding path program 1 times [2022-07-19 20:30:02,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:30:02,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368612854] [2022-07-19 20:30:02,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:30:02,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:30:02,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:02,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:30:02,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:02,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-19 20:30:02,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:02,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 20:30:02,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:02,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-19 20:30:02,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:02,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-19 20:30:02,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:02,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:30:02,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:30:02,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368612854] [2022-07-19 20:30:02,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368612854] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:30:02,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:30:02,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:30:02,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001944092] [2022-07-19 20:30:02,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:30:02,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:30:02,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:30:02,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:30:02,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:30:02,143 INFO L87 Difference]: Start difference. First operand 4447 states and 6942 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 20:30:03,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:30:03,227 INFO L93 Difference]: Finished difference Result 10430 states and 16518 transitions. [2022-07-19 20:30:03,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 20:30:03,228 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2022-07-19 20:30:03,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:30:03,244 INFO L225 Difference]: With dead ends: 10430 [2022-07-19 20:30:03,244 INFO L226 Difference]: Without dead ends: 6000 [2022-07-19 20:30:03,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-19 20:30:03,255 INFO L413 NwaCegarLoop]: 430 mSDtfsCounter, 853 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 869 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 20:30:03,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [869 Valid, 1145 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 990 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 20:30:03,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6000 states. [2022-07-19 20:30:03,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6000 to 4447. [2022-07-19 20:30:03,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4447 states, 4032 states have (on average 1.5471230158730158) internal successors, (6238), 4050 states have internal predecessors, (6238), 296 states have call successors, (296), 103 states have call predecessors, (296), 118 states have return successors, (391), 309 states have call predecessors, (391), 294 states have call successors, (391) [2022-07-19 20:30:03,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4447 states to 4447 states and 6925 transitions. [2022-07-19 20:30:03,492 INFO L78 Accepts]: Start accepts. Automaton has 4447 states and 6925 transitions. Word has length 135 [2022-07-19 20:30:03,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:30:03,492 INFO L495 AbstractCegarLoop]: Abstraction has 4447 states and 6925 transitions. [2022-07-19 20:30:03,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 20:30:03,493 INFO L276 IsEmpty]: Start isEmpty. Operand 4447 states and 6925 transitions. [2022-07-19 20:30:03,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-19 20:30:03,495 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:30:03,495 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:30:03,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-19 20:30:03,496 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:30:03,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:30:03,496 INFO L85 PathProgramCache]: Analyzing trace with hash 499957434, now seen corresponding path program 1 times [2022-07-19 20:30:03,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:30:03,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307708838] [2022-07-19 20:30:03,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:30:03,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:30:03,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:03,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:30:03,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:03,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-19 20:30:03,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:03,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 20:30:03,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:03,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-19 20:30:03,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:03,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-19 20:30:03,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:03,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:30:03,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:30:03,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307708838] [2022-07-19 20:30:03,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307708838] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:30:03,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:30:03,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:30:03,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926945725] [2022-07-19 20:30:03,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:30:03,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:30:03,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:30:03,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:30:03,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:30:03,584 INFO L87 Difference]: Start difference. First operand 4447 states and 6925 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 20:30:05,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:30:05,783 INFO L93 Difference]: Finished difference Result 15775 states and 24829 transitions. [2022-07-19 20:30:05,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 20:30:05,783 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2022-07-19 20:30:05,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:30:05,816 INFO L225 Difference]: With dead ends: 15775 [2022-07-19 20:30:05,817 INFO L226 Difference]: Without dead ends: 11345 [2022-07-19 20:30:05,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-19 20:30:05,829 INFO L413 NwaCegarLoop]: 708 mSDtfsCounter, 1091 mSDsluCounter, 1447 mSDsCounter, 0 mSdLazyCounter, 2170 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1106 SdHoareTripleChecker+Valid, 2155 SdHoareTripleChecker+Invalid, 2248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-19 20:30:05,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1106 Valid, 2155 Invalid, 2248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2170 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-19 20:30:05,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11345 states. [2022-07-19 20:30:06,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11345 to 8659. [2022-07-19 20:30:06,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8659 states, 7860 states have (on average 1.5440203562340966) internal successors, (12136), 7894 states have internal predecessors, (12136), 568 states have call successors, (568), 199 states have call predecessors, (568), 230 states have return successors, (841), 597 states have call predecessors, (841), 566 states have call successors, (841) [2022-07-19 20:30:06,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8659 states to 8659 states and 13545 transitions. [2022-07-19 20:30:06,304 INFO L78 Accepts]: Start accepts. Automaton has 8659 states and 13545 transitions. Word has length 135 [2022-07-19 20:30:06,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:30:06,304 INFO L495 AbstractCegarLoop]: Abstraction has 8659 states and 13545 transitions. [2022-07-19 20:30:06,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 20:30:06,305 INFO L276 IsEmpty]: Start isEmpty. Operand 8659 states and 13545 transitions. [2022-07-19 20:30:06,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-19 20:30:06,309 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:30:06,309 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:30:06,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-19 20:30:06,310 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:30:06,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:30:06,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1473207944, now seen corresponding path program 1 times [2022-07-19 20:30:06,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:30:06,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71552732] [2022-07-19 20:30:06,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:30:06,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:30:06,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:06,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:30:06,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:06,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-19 20:30:06,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:06,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 20:30:06,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:06,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-19 20:30:06,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:06,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-19 20:30:06,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:06,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:30:06,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:30:06,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71552732] [2022-07-19 20:30:06,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71552732] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:30:06,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:30:06,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:30:06,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462184380] [2022-07-19 20:30:06,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:30:06,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:30:06,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:30:06,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:30:06,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:30:06,386 INFO L87 Difference]: Start difference. First operand 8659 states and 13545 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 20:30:09,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:30:09,846 INFO L93 Difference]: Finished difference Result 34689 states and 54625 transitions. [2022-07-19 20:30:09,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 20:30:09,847 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2022-07-19 20:30:09,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:30:09,926 INFO L225 Difference]: With dead ends: 34689 [2022-07-19 20:30:09,926 INFO L226 Difference]: Without dead ends: 26047 [2022-07-19 20:30:09,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-19 20:30:09,952 INFO L413 NwaCegarLoop]: 701 mSDtfsCounter, 1420 mSDsluCounter, 1439 mSDsCounter, 0 mSdLazyCounter, 2155 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1444 SdHoareTripleChecker+Valid, 2140 SdHoareTripleChecker+Invalid, 2238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-19 20:30:09,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1444 Valid, 2140 Invalid, 2238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2155 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-19 20:30:09,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26047 states. [2022-07-19 20:30:10,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26047 to 17012. [2022-07-19 20:30:10,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17012 states, 15477 states have (on average 1.5443561413710667) internal successors, (23902), 15543 states have internal predecessors, (23902), 1080 states have call successors, (1080), 391 states have call predecessors, (1080), 454 states have return successors, (1871), 1141 states have call predecessors, (1871), 1078 states have call successors, (1871) [2022-07-19 20:30:10,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17012 states to 17012 states and 26853 transitions. [2022-07-19 20:30:10,995 INFO L78 Accepts]: Start accepts. Automaton has 17012 states and 26853 transitions. Word has length 135 [2022-07-19 20:30:10,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:30:10,996 INFO L495 AbstractCegarLoop]: Abstraction has 17012 states and 26853 transitions. [2022-07-19 20:30:10,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 20:30:10,996 INFO L276 IsEmpty]: Start isEmpty. Operand 17012 states and 26853 transitions. [2022-07-19 20:30:11,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-19 20:30:11,005 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:30:11,005 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:30:11,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-19 20:30:11,006 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:30:11,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:30:11,006 INFO L85 PathProgramCache]: Analyzing trace with hash 679898874, now seen corresponding path program 1 times [2022-07-19 20:30:11,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:30:11,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096662483] [2022-07-19 20:30:11,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:30:11,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:30:11,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:11,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:30:11,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:11,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-19 20:30:11,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:11,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 20:30:11,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:11,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-19 20:30:11,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:11,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-19 20:30:11,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:11,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:30:11,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:30:11,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096662483] [2022-07-19 20:30:11,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096662483] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:30:11,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:30:11,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:30:11,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894919083] [2022-07-19 20:30:11,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:30:11,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:30:11,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:30:11,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:30:11,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:30:11,088 INFO L87 Difference]: Start difference. First operand 17012 states and 26853 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 20:30:16,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:30:16,842 INFO L93 Difference]: Finished difference Result 67584 states and 107315 transitions. [2022-07-19 20:30:16,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 20:30:16,842 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2022-07-19 20:30:16,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:30:17,052 INFO L225 Difference]: With dead ends: 67584 [2022-07-19 20:30:17,052 INFO L226 Difference]: Without dead ends: 50589 [2022-07-19 20:30:17,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-19 20:30:17,105 INFO L413 NwaCegarLoop]: 819 mSDtfsCounter, 1161 mSDsluCounter, 1436 mSDsCounter, 0 mSdLazyCounter, 2515 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1175 SdHoareTripleChecker+Valid, 2255 SdHoareTripleChecker+Invalid, 2595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 2515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-19 20:30:17,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1175 Valid, 2255 Invalid, 2595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 2515 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-19 20:30:17,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50589 states. [2022-07-19 20:30:19,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50589 to 33045. [2022-07-19 20:30:19,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33045 states, 30070 states have (on average 1.5401396740937812) internal successors, (46312), 30200 states have internal predecessors, (46312), 2072 states have call successors, (2072), 775 states have call predecessors, (2072), 902 states have return successors, (4385), 2197 states have call predecessors, (4385), 2070 states have call successors, (4385) [2022-07-19 20:30:19,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33045 states to 33045 states and 52769 transitions. [2022-07-19 20:30:19,390 INFO L78 Accepts]: Start accepts. Automaton has 33045 states and 52769 transitions. Word has length 135 [2022-07-19 20:30:19,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:30:19,390 INFO L495 AbstractCegarLoop]: Abstraction has 33045 states and 52769 transitions. [2022-07-19 20:30:19,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 20:30:19,390 INFO L276 IsEmpty]: Start isEmpty. Operand 33045 states and 52769 transitions. [2022-07-19 20:30:19,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-19 20:30:19,404 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:30:19,404 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:30:19,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-19 20:30:19,405 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:30:19,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:30:19,405 INFO L85 PathProgramCache]: Analyzing trace with hash 56617272, now seen corresponding path program 1 times [2022-07-19 20:30:19,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:30:19,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650998002] [2022-07-19 20:30:19,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:30:19,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:30:19,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:19,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:30:19,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:19,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-19 20:30:19,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:19,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 20:30:19,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:19,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-19 20:30:19,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:19,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-19 20:30:19,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:19,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:30:19,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:30:19,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650998002] [2022-07-19 20:30:19,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650998002] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:30:19,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:30:19,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:30:19,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354197511] [2022-07-19 20:30:19,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:30:19,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:30:19,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:30:19,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:30:19,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:30:19,498 INFO L87 Difference]: Start difference. First operand 33045 states and 52769 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 20:30:29,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:30:29,131 INFO L93 Difference]: Finished difference Result 130271 states and 209233 transitions. [2022-07-19 20:30:29,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 20:30:29,132 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2022-07-19 20:30:29,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:30:29,461 INFO L225 Difference]: With dead ends: 130271 [2022-07-19 20:30:29,461 INFO L226 Difference]: Without dead ends: 97243 [2022-07-19 20:30:29,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-19 20:30:29,551 INFO L413 NwaCegarLoop]: 691 mSDtfsCounter, 1340 mSDsluCounter, 1439 mSDsCounter, 0 mSdLazyCounter, 2139 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1364 SdHoareTripleChecker+Valid, 2130 SdHoareTripleChecker+Invalid, 2222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-19 20:30:29,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1364 Valid, 2130 Invalid, 2222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2139 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-19 20:30:29,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97243 states. [2022-07-19 20:30:34,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97243 to 65686. [2022-07-19 20:30:34,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65686 states, 59895 states have (on average 1.5417981467568245) internal successors, (92346), 60153 states have internal predecessors, (92346), 3992 states have call successors, (3992), 1543 states have call predecessors, (3992), 1798 states have return successors, (10807), 4245 states have call predecessors, (10807), 3990 states have call successors, (10807) [2022-07-19 20:30:34,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65686 states to 65686 states and 107145 transitions. [2022-07-19 20:30:34,528 INFO L78 Accepts]: Start accepts. Automaton has 65686 states and 107145 transitions. Word has length 135 [2022-07-19 20:30:34,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:30:34,528 INFO L495 AbstractCegarLoop]: Abstraction has 65686 states and 107145 transitions. [2022-07-19 20:30:34,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 20:30:34,528 INFO L276 IsEmpty]: Start isEmpty. Operand 65686 states and 107145 transitions. [2022-07-19 20:30:34,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-19 20:30:34,554 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:30:34,554 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:30:34,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-19 20:30:34,555 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:30:34,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:30:34,555 INFO L85 PathProgramCache]: Analyzing trace with hash 175058746, now seen corresponding path program 1 times [2022-07-19 20:30:34,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:30:34,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63537467] [2022-07-19 20:30:34,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:30:34,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:30:34,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:34,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:30:34,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:34,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-19 20:30:34,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:34,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 20:30:34,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:34,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-19 20:30:34,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:34,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-19 20:30:34,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:30:34,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:30:34,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:30:34,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63537467] [2022-07-19 20:30:34,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63537467] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:30:34,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:30:34,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:30:34,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524741997] [2022-07-19 20:30:34,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:30:34,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:30:34,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:30:34,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:30:34,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:30:34,628 INFO L87 Difference]: Start difference. First operand 65686 states and 107145 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 20:30:52,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:30:52,384 INFO L93 Difference]: Finished difference Result 255070 states and 418455 transitions. [2022-07-19 20:30:52,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 20:30:52,384 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2022-07-19 20:30:52,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:30:53,099 INFO L225 Difference]: With dead ends: 255070 [2022-07-19 20:30:53,099 INFO L226 Difference]: Without dead ends: 189401 [2022-07-19 20:30:53,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-19 20:30:53,297 INFO L413 NwaCegarLoop]: 778 mSDtfsCounter, 1140 mSDsluCounter, 1439 mSDsCounter, 0 mSdLazyCounter, 2430 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1154 SdHoareTripleChecker+Valid, 2217 SdHoareTripleChecker+Invalid, 2510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 2430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-19 20:30:53,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1154 Valid, 2217 Invalid, 2510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 2430 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-19 20:30:53,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189401 states. [2022-07-19 20:31:02,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189401 to 130839. [2022-07-19 20:31:03,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130839 states, 119544 states have (on average 1.5436993910192063) internal successors, (184540), 120058 states have internal predecessors, (184540), 7704 states have call successors, (7704), 3079 states have call predecessors, (7704), 3590 states have return successors, (27897), 8213 states have call predecessors, (27897), 7702 states have call successors, (27897) [2022-07-19 20:31:03,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130839 states to 130839 states and 220141 transitions. [2022-07-19 20:31:03,612 INFO L78 Accepts]: Start accepts. Automaton has 130839 states and 220141 transitions. Word has length 135 [2022-07-19 20:31:03,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:31:03,612 INFO L495 AbstractCegarLoop]: Abstraction has 130839 states and 220141 transitions. [2022-07-19 20:31:03,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 20:31:03,612 INFO L276 IsEmpty]: Start isEmpty. Operand 130839 states and 220141 transitions. [2022-07-19 20:31:03,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-19 20:31:03,658 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:31:03,658 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:31:03,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-19 20:31:03,658 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:31:03,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:31:03,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1564352760, now seen corresponding path program 1 times [2022-07-19 20:31:03,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:31:03,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439058838] [2022-07-19 20:31:03,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:31:03,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:31:03,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:31:03,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:31:03,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:31:03,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-19 20:31:03,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:31:03,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 20:31:03,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:31:03,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-19 20:31:03,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:31:03,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-19 20:31:03,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:31:03,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:31:03,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:31:03,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439058838] [2022-07-19 20:31:03,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439058838] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:31:03,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:31:03,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:31:03,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027121012] [2022-07-19 20:31:03,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:31:03,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:31:03,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:31:03,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:31:03,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:31:03,733 INFO L87 Difference]: Start difference. First operand 130839 states and 220141 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)