./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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_3.cil+token_ring.10.cil-1.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 5fa3500dbb7b48d33bda6025d194df10b5d868e3a16ab8452fef68790ebc5c6f --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 20:52:59,862 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 20:52:59,885 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 20:52:59,920 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 20:52:59,921 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 20:52:59,922 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 20:52:59,924 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 20:52:59,927 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 20:52:59,931 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 20:52:59,932 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 20:52:59,932 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 20:52:59,933 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 20:52:59,934 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 20:52:59,936 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 20:52:59,937 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 20:52:59,938 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 20:52:59,939 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 20:52:59,942 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 20:52:59,944 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 20:52:59,946 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 20:52:59,949 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 20:52:59,950 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 20:52:59,950 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 20:52:59,951 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 20:52:59,952 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 20:52:59,954 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 20:52:59,955 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 20:52:59,956 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 20:52:59,956 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 20:52:59,957 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 20:52:59,957 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 20:52:59,958 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 20:52:59,959 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 20:52:59,959 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 20:52:59,960 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 20:52:59,961 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 20:52:59,961 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 20:52:59,961 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 20:52:59,962 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 20:52:59,962 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 20:52:59,962 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 20:52:59,964 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 20:52:59,964 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 20:52:59,988 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 20:52:59,989 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 20:52:59,989 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 20:52:59,989 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 20:52:59,990 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 20:52:59,990 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 20:52:59,991 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 20:52:59,991 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 20:52:59,991 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 20:52:59,992 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 20:52:59,992 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 20:52:59,992 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 20:52:59,992 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 20:52:59,992 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 20:52:59,992 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 20:52:59,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 20:52:59,993 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 20:52:59,993 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 20:52:59,993 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 20:52:59,993 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 20:52:59,993 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 20:52:59,993 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 20:52:59,994 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 20:52:59,994 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 20:52:59,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 20:52:59,994 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 20:52:59,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 20:52:59,994 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 20:52:59,995 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 20:52:59,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 20:52:59,995 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 20:52:59,995 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 20:52:59,995 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 20:52:59,995 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fa3500dbb7b48d33bda6025d194df10b5d868e3a16ab8452fef68790ebc5c6f [2022-07-22 20:53:00,203 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 20:53:00,217 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 20:53:00,219 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 20:53:00,220 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 20:53:00,220 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 20:53:00,221 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c [2022-07-22 20:53:00,260 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e37f67ac8/d11ef3263e8f4b469b45c8573e67855a/FLAG04e97d211 [2022-07-22 20:53:00,643 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 20:53:00,643 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c [2022-07-22 20:53:00,666 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e37f67ac8/d11ef3263e8f4b469b45c8573e67855a/FLAG04e97d211 [2022-07-22 20:53:00,681 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e37f67ac8/d11ef3263e8f4b469b45c8573e67855a [2022-07-22 20:53:00,683 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 20:53:00,684 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 20:53:00,685 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 20:53:00,685 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 20:53:00,688 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 20:53:00,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 08:53:00" (1/1) ... [2022-07-22 20:53:00,689 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5090c728 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:53:00, skipping insertion in model container [2022-07-22 20:53:00,689 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 08:53:00" (1/1) ... [2022-07-22 20:53:00,694 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 20:53:00,725 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 20:53:00,858 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_3.cil+token_ring.10.cil-1.c[911,924] [2022-07-22 20:53:00,926 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_3.cil+token_ring.10.cil-1.c[8416,8429] [2022-07-22 20:53:01,013 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 20:53:01,023 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 20:53:01,030 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_3.cil+token_ring.10.cil-1.c[911,924] [2022-07-22 20:53:01,058 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_3.cil+token_ring.10.cil-1.c[8416,8429] [2022-07-22 20:53:01,078 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 20:53:01,092 INFO L208 MainTranslator]: Completed translation [2022-07-22 20:53:01,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:53:01 WrapperNode [2022-07-22 20:53:01,093 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 20:53:01,094 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 20:53:01,094 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 20:53:01,094 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 20:53:01,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:53:01" (1/1) ... [2022-07-22 20:53:01,114 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:53:01" (1/1) ... [2022-07-22 20:53:01,157 INFO L137 Inliner]: procedures = 75, calls = 92, calls flagged for inlining = 43, calls inlined = 43, statements flattened = 967 [2022-07-22 20:53:01,159 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 20:53:01,159 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 20:53:01,159 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 20:53:01,159 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 20:53:01,165 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:53:01" (1/1) ... [2022-07-22 20:53:01,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:53:01" (1/1) ... [2022-07-22 20:53:01,169 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:53:01" (1/1) ... [2022-07-22 20:53:01,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:53:01" (1/1) ... [2022-07-22 20:53:01,195 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:53:01" (1/1) ... [2022-07-22 20:53:01,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:53:01" (1/1) ... [2022-07-22 20:53:01,224 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:53:01" (1/1) ... [2022-07-22 20:53:01,231 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 20:53:01,235 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 20:53:01,235 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 20:53:01,235 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 20:53:01,237 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:53:01" (1/1) ... [2022-07-22 20:53:01,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 20:53:01,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:53:01,260 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) [2022-07-22 20:53:01,266 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 [2022-07-22 20:53:01,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 20:53:01,287 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-07-22 20:53:01,288 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-07-22 20:53:01,288 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-07-22 20:53:01,288 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-07-22 20:53:01,288 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-07-22 20:53:01,288 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-07-22 20:53:01,288 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-07-22 20:53:01,288 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-07-22 20:53:01,288 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-07-22 20:53:01,289 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-07-22 20:53:01,289 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-07-22 20:53:01,289 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-07-22 20:53:01,289 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-07-22 20:53:01,289 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-07-22 20:53:01,289 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-07-22 20:53:01,289 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-07-22 20:53:01,290 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-07-22 20:53:01,290 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-07-22 20:53:01,290 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-07-22 20:53:01,290 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-07-22 20:53:01,290 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-07-22 20:53:01,290 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-07-22 20:53:01,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 20:53:01,290 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-07-22 20:53:01,291 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-07-22 20:53:01,291 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-07-22 20:53:01,291 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-07-22 20:53:01,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 20:53:01,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 20:53:01,291 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-07-22 20:53:01,291 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-07-22 20:53:01,291 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-07-22 20:53:01,292 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-07-22 20:53:01,443 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 20:53:01,444 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 20:53:01,986 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2022-07-22 20:53:01,986 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2022-07-22 20:53:02,033 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 20:53:02,041 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 20:53:02,047 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2022-07-22 20:53:02,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 08:53:02 BoogieIcfgContainer [2022-07-22 20:53:02,050 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 20:53:02,051 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 20:53:02,052 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 20:53:02,054 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 20:53:02,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 08:53:00" (1/3) ... [2022-07-22 20:53:02,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24e5364e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 08:53:02, skipping insertion in model container [2022-07-22 20:53:02,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:53:01" (2/3) ... [2022-07-22 20:53:02,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24e5364e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 08:53:02, skipping insertion in model container [2022-07-22 20:53:02,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 08:53:02" (3/3) ... [2022-07-22 20:53:02,058 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.10.cil-1.c [2022-07-22 20:53:02,067 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 20:53:02,068 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-22 20:53:02,120 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 20:53:02,126 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@6d29a082, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1dddc1f0 [2022-07-22 20:53:02,127 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 20:53:02,144 INFO L276 IsEmpty]: Start isEmpty. Operand has 457 states, 397 states have (on average 1.6347607052896724) internal successors, (649), 405 states have internal predecessors, (649), 42 states have call successors, (42), 15 states have call predecessors, (42), 15 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2022-07-22 20:53:02,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 20:53:02,152 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:53:02,153 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] [2022-07-22 20:53:02,153 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:53:02,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:53:02,156 INFO L85 PathProgramCache]: Analyzing trace with hash -2009342201, now seen corresponding path program 1 times [2022-07-22 20:53:02,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:53:02,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041174566] [2022-07-22 20:53:02,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:53:02,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:53:02,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:02,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:53:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:02,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:53:02,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:02,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:53:02,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:02,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:53:02,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:02,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:53:02,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:02,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 20:53:02,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:02,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 20:53:02,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:02,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:53:02,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:53:02,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041174566] [2022-07-22 20:53:02,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041174566] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:53:02,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:53:02,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 20:53:02,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333755861] [2022-07-22 20:53:02,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:53:02,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 20:53:02,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:53:02,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 20:53:02,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:53:02,474 INFO L87 Difference]: Start difference. First operand has 457 states, 397 states have (on average 1.6347607052896724) internal successors, (649), 405 states have internal predecessors, (649), 42 states have call successors, (42), 15 states have call predecessors, (42), 15 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-22 20:53:03,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:53:03,360 INFO L93 Difference]: Finished difference Result 1038 states and 1657 transitions. [2022-07-22 20:53:03,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 20:53:03,362 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2022-07-22 20:53:03,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:53:03,380 INFO L225 Difference]: With dead ends: 1038 [2022-07-22 20:53:03,380 INFO L226 Difference]: Without dead ends: 597 [2022-07-22 20:53:03,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-07-22 20:53:03,389 INFO L413 NwaCegarLoop]: 697 mSDtfsCounter, 1154 mSDsluCounter, 1314 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1161 SdHoareTripleChecker+Valid, 2011 SdHoareTripleChecker+Invalid, 1208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 20:53:03,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1161 Valid, 2011 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 20:53:03,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2022-07-22 20:53:03,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 558. [2022-07-22 20:53:03,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 479 states have (on average 1.524008350730689) internal successors, (730), 486 states have internal predecessors, (730), 55 states have call successors, (55), 22 states have call predecessors, (55), 22 states have return successors, (56), 52 states have call predecessors, (56), 51 states have call successors, (56) [2022-07-22 20:53:03,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 841 transitions. [2022-07-22 20:53:03,460 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 841 transitions. Word has length 65 [2022-07-22 20:53:03,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:53:03,460 INFO L495 AbstractCegarLoop]: Abstraction has 558 states and 841 transitions. [2022-07-22 20:53:03,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-22 20:53:03,460 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 841 transitions. [2022-07-22 20:53:03,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 20:53:03,463 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:53:03,463 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] [2022-07-22 20:53:03,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 20:53:03,464 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:53:03,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:53:03,464 INFO L85 PathProgramCache]: Analyzing trace with hash -330453561, now seen corresponding path program 1 times [2022-07-22 20:53:03,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:53:03,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71066701] [2022-07-22 20:53:03,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:53:03,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:53:03,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:03,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:53:03,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:03,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:53:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:03,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:53:03,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:03,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:53:03,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:03,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:53:03,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:03,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 20:53:03,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:03,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 20:53:03,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:03,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:53:03,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:53:03,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71066701] [2022-07-22 20:53:03,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71066701] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:53:03,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:53:03,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 20:53:03,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997191610] [2022-07-22 20:53:03,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:53:03,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 20:53:03,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:53:03,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 20:53:03,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:53:03,608 INFO L87 Difference]: Start difference. First operand 558 states and 841 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-22 20:53:04,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:53:04,584 INFO L93 Difference]: Finished difference Result 955 states and 1407 transitions. [2022-07-22 20:53:04,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 20:53:04,584 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2022-07-22 20:53:04,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:53:04,588 INFO L225 Difference]: With dead ends: 955 [2022-07-22 20:53:04,588 INFO L226 Difference]: Without dead ends: 746 [2022-07-22 20:53:04,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-07-22 20:53:04,590 INFO L413 NwaCegarLoop]: 762 mSDtfsCounter, 1326 mSDsluCounter, 1921 mSDsCounter, 0 mSdLazyCounter, 1410 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1357 SdHoareTripleChecker+Valid, 2683 SdHoareTripleChecker+Invalid, 1547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 20:53:04,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1357 Valid, 2683 Invalid, 1547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1410 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 20:53:04,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-07-22 20:53:04,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 670. [2022-07-22 20:53:04,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 569 states have (on average 1.5043936731107206) internal successors, (856), 578 states have internal predecessors, (856), 68 states have call successors, (68), 29 states have call predecessors, (68), 31 states have return successors, (77), 66 states have call predecessors, (77), 64 states have call successors, (77) [2022-07-22 20:53:04,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1001 transitions. [2022-07-22 20:53:04,626 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1001 transitions. Word has length 65 [2022-07-22 20:53:04,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:53:04,627 INFO L495 AbstractCegarLoop]: Abstraction has 670 states and 1001 transitions. [2022-07-22 20:53:04,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-22 20:53:04,627 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1001 transitions. [2022-07-22 20:53:04,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 20:53:04,633 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:53:04,634 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] [2022-07-22 20:53:04,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 20:53:04,634 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:53:04,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:53:04,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1935927625, now seen corresponding path program 1 times [2022-07-22 20:53:04,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:53:04,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524789480] [2022-07-22 20:53:04,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:53:04,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:53:04,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:04,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:53:04,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:04,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:53:04,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:04,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:53:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:04,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:53:04,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:04,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:53:04,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:04,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 20:53:04,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:04,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 20:53:04,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:04,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:53:04,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:53:04,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524789480] [2022-07-22 20:53:04,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524789480] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:53:04,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:53:04,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-22 20:53:04,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859470996] [2022-07-22 20:53:04,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:53:04,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 20:53:04,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:53:04,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 20:53:04,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-22 20:53:04,766 INFO L87 Difference]: Start difference. First operand 670 states and 1001 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-22 20:53:06,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:53:06,292 INFO L93 Difference]: Finished difference Result 2216 states and 3199 transitions. [2022-07-22 20:53:06,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-22 20:53:06,293 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 65 [2022-07-22 20:53:06,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:53:06,301 INFO L225 Difference]: With dead ends: 2216 [2022-07-22 20:53:06,302 INFO L226 Difference]: Without dead ends: 1883 [2022-07-22 20:53:06,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2022-07-22 20:53:06,305 INFO L413 NwaCegarLoop]: 812 mSDtfsCounter, 3975 mSDsluCounter, 1816 mSDsCounter, 0 mSdLazyCounter, 1722 mSolverCounterSat, 753 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3993 SdHoareTripleChecker+Valid, 2628 SdHoareTripleChecker+Invalid, 2475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 753 IncrementalHoareTripleChecker+Valid, 1722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 20:53:06,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3993 Valid, 2628 Invalid, 2475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [753 Valid, 1722 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-22 20:53:06,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2022-07-22 20:53:06,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1723. [2022-07-22 20:53:06,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1723 states, 1417 states have (on average 1.4114326040931546) internal successors, (2000), 1441 states have internal predecessors, (2000), 178 states have call successors, (178), 112 states have call predecessors, (178), 126 states have return successors, (210), 172 states have call predecessors, (210), 174 states have call successors, (210) [2022-07-22 20:53:06,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1723 states to 1723 states and 2388 transitions. [2022-07-22 20:53:06,376 INFO L78 Accepts]: Start accepts. Automaton has 1723 states and 2388 transitions. Word has length 65 [2022-07-22 20:53:06,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:53:06,377 INFO L495 AbstractCegarLoop]: Abstraction has 1723 states and 2388 transitions. [2022-07-22 20:53:06,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-22 20:53:06,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1723 states and 2388 transitions. [2022-07-22 20:53:06,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-22 20:53:06,378 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:53:06,378 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] [2022-07-22 20:53:06,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 20:53:06,378 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:53:06,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:53:06,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1448069129, now seen corresponding path program 1 times [2022-07-22 20:53:06,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:53:06,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469021202] [2022-07-22 20:53:06,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:53:06,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:53:06,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:06,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:53:06,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:06,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:53:06,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:06,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:53:06,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:06,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:53:06,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:06,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-22 20:53:06,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:06,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-22 20:53:06,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:06,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 20:53:06,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:06,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:53:06,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:53:06,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469021202] [2022-07-22 20:53:06,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469021202] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:53:06,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:53:06,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-22 20:53:06,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650863829] [2022-07-22 20:53:06,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:53:06,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 20:53:06,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:53:06,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 20:53:06,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-22 20:53:06,521 INFO L87 Difference]: Start difference. First operand 1723 states and 2388 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-22 20:53:07,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:53:07,337 INFO L93 Difference]: Finished difference Result 3251 states and 4467 transitions. [2022-07-22 20:53:07,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 20:53:07,338 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2022-07-22 20:53:07,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:53:07,345 INFO L225 Difference]: With dead ends: 3251 [2022-07-22 20:53:07,345 INFO L226 Difference]: Without dead ends: 1871 [2022-07-22 20:53:07,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-22 20:53:07,348 INFO L413 NwaCegarLoop]: 670 mSDtfsCounter, 875 mSDsluCounter, 2030 mSDsCounter, 0 mSdLazyCounter, 1505 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 876 SdHoareTripleChecker+Valid, 2700 SdHoareTripleChecker+Invalid, 1653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 20:53:07,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [876 Valid, 2700 Invalid, 1653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1505 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 20:53:07,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2022-07-22 20:53:07,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 1763. [2022-07-22 20:53:07,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1449 states have (on average 1.3982056590752243) internal successors, (2026), 1473 states have internal predecessors, (2026), 178 states have call successors, (178), 112 states have call predecessors, (178), 134 states have return successors, (218), 180 states have call predecessors, (218), 174 states have call successors, (218) [2022-07-22 20:53:07,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 2422 transitions. [2022-07-22 20:53:07,401 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 2422 transitions. Word has length 66 [2022-07-22 20:53:07,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:53:07,402 INFO L495 AbstractCegarLoop]: Abstraction has 1763 states and 2422 transitions. [2022-07-22 20:53:07,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-22 20:53:07,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 2422 transitions. [2022-07-22 20:53:07,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-22 20:53:07,402 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:53:07,403 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] [2022-07-22 20:53:07,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 20:53:07,403 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:53:07,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:53:07,403 INFO L85 PathProgramCache]: Analyzing trace with hash 418709831, now seen corresponding path program 1 times [2022-07-22 20:53:07,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:53:07,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845708249] [2022-07-22 20:53:07,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:53:07,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:53:07,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:07,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:53:07,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:07,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:53:07,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:07,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:53:07,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:07,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:53:07,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:07,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-22 20:53:07,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:07,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-22 20:53:07,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:07,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 20:53:07,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:07,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:53:07,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:53:07,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845708249] [2022-07-22 20:53:07,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845708249] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:53:07,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:53:07,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-22 20:53:07,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367736654] [2022-07-22 20:53:07,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:53:07,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 20:53:07,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:53:07,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 20:53:07,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-22 20:53:07,488 INFO L87 Difference]: Start difference. First operand 1763 states and 2422 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-22 20:53:09,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:53:09,012 INFO L93 Difference]: Finished difference Result 5335 states and 7296 transitions. [2022-07-22 20:53:09,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-22 20:53:09,013 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 66 [2022-07-22 20:53:09,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:53:09,043 INFO L225 Difference]: With dead ends: 5335 [2022-07-22 20:53:09,044 INFO L226 Difference]: Without dead ends: 2154 [2022-07-22 20:53:09,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2022-07-22 20:53:09,052 INFO L413 NwaCegarLoop]: 809 mSDtfsCounter, 3628 mSDsluCounter, 2244 mSDsCounter, 0 mSdLazyCounter, 1794 mSolverCounterSat, 679 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3646 SdHoareTripleChecker+Valid, 3053 SdHoareTripleChecker+Invalid, 2473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 679 IncrementalHoareTripleChecker+Valid, 1794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 20:53:09,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3646 Valid, 3053 Invalid, 2473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [679 Valid, 1794 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-22 20:53:09,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2022-07-22 20:53:09,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 1974. [2022-07-22 20:53:09,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1588 states have (on average 1.3551637279596978) internal successors, (2152), 1614 states have internal predecessors, (2152), 218 states have call successors, (218), 140 states have call predecessors, (218), 166 states have return successors, (264), 222 states have call predecessors, (264), 214 states have call successors, (264) [2022-07-22 20:53:09,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 2634 transitions. [2022-07-22 20:53:09,121 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 2634 transitions. Word has length 66 [2022-07-22 20:53:09,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:53:09,121 INFO L495 AbstractCegarLoop]: Abstraction has 1974 states and 2634 transitions. [2022-07-22 20:53:09,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-22 20:53:09,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 2634 transitions. [2022-07-22 20:53:09,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-22 20:53:09,123 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:53:09,123 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:53:09,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 20:53:09,123 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:53:09,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:53:09,124 INFO L85 PathProgramCache]: Analyzing trace with hash -440043302, now seen corresponding path program 1 times [2022-07-22 20:53:09,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:53:09,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456962308] [2022-07-22 20:53:09,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:53:09,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:53:09,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:09,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:53:09,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:09,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:53:09,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:09,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:53:09,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:09,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:53:09,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:09,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-22 20:53:09,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:09,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 20:53:09,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:09,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 20:53:09,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:09,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-22 20:53:09,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:09,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 20:53:09,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:53:09,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456962308] [2022-07-22 20:53:09,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456962308] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:53:09,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:53:09,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-22 20:53:09,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656475987] [2022-07-22 20:53:09,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:53:09,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 20:53:09,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:53:09,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 20:53:09,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-22 20:53:09,235 INFO L87 Difference]: Start difference. First operand 1974 states and 2634 transitions. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-22 20:53:10,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:53:10,055 INFO L93 Difference]: Finished difference Result 3799 states and 5036 transitions. [2022-07-22 20:53:10,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 20:53:10,055 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 91 [2022-07-22 20:53:10,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:53:10,063 INFO L225 Difference]: With dead ends: 3799 [2022-07-22 20:53:10,064 INFO L226 Difference]: Without dead ends: 2168 [2022-07-22 20:53:10,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-07-22 20:53:10,069 INFO L413 NwaCegarLoop]: 657 mSDtfsCounter, 869 mSDsluCounter, 1995 mSDsCounter, 0 mSdLazyCounter, 1472 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 2652 SdHoareTripleChecker+Invalid, 1623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 20:53:10,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [871 Valid, 2652 Invalid, 1623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1472 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 20:53:10,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2168 states. [2022-07-22 20:53:10,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2168 to 2034. [2022-07-22 20:53:10,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 1636 states have (on average 1.341075794621027) internal successors, (2194), 1662 states have internal predecessors, (2194), 218 states have call successors, (218), 140 states have call predecessors, (218), 178 states have return successors, (276), 234 states have call predecessors, (276), 214 states have call successors, (276) [2022-07-22 20:53:10,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 2688 transitions. [2022-07-22 20:53:10,144 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 2688 transitions. Word has length 91 [2022-07-22 20:53:10,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:53:10,146 INFO L495 AbstractCegarLoop]: Abstraction has 2034 states and 2688 transitions. [2022-07-22 20:53:10,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-22 20:53:10,146 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 2688 transitions. [2022-07-22 20:53:10,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-22 20:53:10,151 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:53:10,151 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:53:10,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 20:53:10,151 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:53:10,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:53:10,152 INFO L85 PathProgramCache]: Analyzing trace with hash 3857372, now seen corresponding path program 1 times [2022-07-22 20:53:10,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:53:10,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820000757] [2022-07-22 20:53:10,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:53:10,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:53:10,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:10,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:53:10,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:10,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:53:10,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:10,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:53:10,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:10,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:53:10,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:10,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-22 20:53:10,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:10,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 20:53:10,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:10,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 20:53:10,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:10,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-22 20:53:10,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:10,235 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 20:53:10,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:53:10,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820000757] [2022-07-22 20:53:10,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820000757] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:53:10,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:53:10,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 20:53:10,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464418962] [2022-07-22 20:53:10,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:53:10,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 20:53:10,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:53:10,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 20:53:10,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:53:10,237 INFO L87 Difference]: Start difference. First operand 2034 states and 2688 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-22 20:53:11,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:53:11,109 INFO L93 Difference]: Finished difference Result 3561 states and 4652 transitions. [2022-07-22 20:53:11,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 20:53:11,109 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 91 [2022-07-22 20:53:11,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:53:11,116 INFO L225 Difference]: With dead ends: 3561 [2022-07-22 20:53:11,117 INFO L226 Difference]: Without dead ends: 2108 [2022-07-22 20:53:11,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-07-22 20:53:11,120 INFO L413 NwaCegarLoop]: 692 mSDtfsCounter, 1635 mSDsluCounter, 1359 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1664 SdHoareTripleChecker+Valid, 2051 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 20:53:11,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1664 Valid, 2051 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 1208 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 20:53:11,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2022-07-22 20:53:11,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1813. [2022-07-22 20:53:11,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1468 states have (on average 1.3460490463215258) internal successors, (1976), 1489 states have internal predecessors, (1976), 190 states have call successors, (190), 121 states have call predecessors, (190), 153 states have return successors, (236), 204 states have call predecessors, (236), 186 states have call successors, (236) [2022-07-22 20:53:11,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 2402 transitions. [2022-07-22 20:53:11,178 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 2402 transitions. Word has length 91 [2022-07-22 20:53:11,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:53:11,179 INFO L495 AbstractCegarLoop]: Abstraction has 1813 states and 2402 transitions. [2022-07-22 20:53:11,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-22 20:53:11,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 2402 transitions. [2022-07-22 20:53:11,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-22 20:53:11,180 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:53:11,181 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:53:11,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 20:53:11,181 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:53:11,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:53:11,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1943019418, now seen corresponding path program 1 times [2022-07-22 20:53:11,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:53:11,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159021664] [2022-07-22 20:53:11,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:53:11,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:53:11,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:11,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:53:11,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:11,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:53:11,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:11,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:53:11,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:11,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:53:11,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:11,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-22 20:53:11,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:11,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 20:53:11,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:11,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 20:53:11,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:11,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-22 20:53:11,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:11,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 20:53:11,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:53:11,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159021664] [2022-07-22 20:53:11,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159021664] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:53:11,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:53:11,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:53:11,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482887259] [2022-07-22 20:53:11,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:53:11,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:53:11,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:53:11,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:53:11,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:53:11,259 INFO L87 Difference]: Start difference. First operand 1813 states and 2402 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-22 20:53:11,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:53:11,684 INFO L93 Difference]: Finished difference Result 4965 states and 6514 transitions. [2022-07-22 20:53:11,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 20:53:11,685 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 91 [2022-07-22 20:53:11,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:53:11,695 INFO L225 Difference]: With dead ends: 4965 [2022-07-22 20:53:11,695 INFO L226 Difference]: Without dead ends: 3496 [2022-07-22 20:53:11,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2022-07-22 20:53:11,698 INFO L413 NwaCegarLoop]: 694 mSDtfsCounter, 1867 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1899 SdHoareTripleChecker+Valid, 1423 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 20:53:11,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1899 Valid, 1423 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 20:53:11,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3496 states. [2022-07-22 20:53:11,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3496 to 3282. [2022-07-22 20:53:11,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3282 states, 2617 states have (on average 1.3007260221627819) internal successors, (3404), 2667 states have internal predecessors, (3404), 351 states have call successors, (351), 234 states have call predecessors, (351), 312 states have return successors, (519), 383 states have call predecessors, (519), 347 states have call successors, (519) [2022-07-22 20:53:11,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3282 states to 3282 states and 4274 transitions. [2022-07-22 20:53:11,793 INFO L78 Accepts]: Start accepts. Automaton has 3282 states and 4274 transitions. Word has length 91 [2022-07-22 20:53:11,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:53:11,794 INFO L495 AbstractCegarLoop]: Abstraction has 3282 states and 4274 transitions. [2022-07-22 20:53:11,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-22 20:53:11,794 INFO L276 IsEmpty]: Start isEmpty. Operand 3282 states and 4274 transitions. [2022-07-22 20:53:11,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-22 20:53:11,795 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:53:11,795 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:53:11,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 20:53:11,796 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:53:11,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:53:11,796 INFO L85 PathProgramCache]: Analyzing trace with hash 885181340, now seen corresponding path program 1 times [2022-07-22 20:53:11,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:53:11,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964369609] [2022-07-22 20:53:11,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:53:11,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:53:11,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:11,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:53:11,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:11,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:53:11,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:11,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:53:11,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:11,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:53:11,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:11,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-22 20:53:11,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:11,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 20:53:11,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:11,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 20:53:11,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:11,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-22 20:53:11,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:11,852 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 20:53:11,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:53:11,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964369609] [2022-07-22 20:53:11,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964369609] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:53:11,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:53:11,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 20:53:11,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249713880] [2022-07-22 20:53:11,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:53:11,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 20:53:11,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:53:11,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 20:53:11,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:53:11,855 INFO L87 Difference]: Start difference. First operand 3282 states and 4274 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-22 20:53:12,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:53:12,302 INFO L93 Difference]: Finished difference Result 4866 states and 6258 transitions. [2022-07-22 20:53:12,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 20:53:12,302 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 91 [2022-07-22 20:53:12,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:53:12,308 INFO L225 Difference]: With dead ends: 4866 [2022-07-22 20:53:12,309 INFO L226 Difference]: Without dead ends: 1928 [2022-07-22 20:53:12,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-22 20:53:12,313 INFO L413 NwaCegarLoop]: 659 mSDtfsCounter, 698 mSDsluCounter, 1173 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 1832 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 20:53:12,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [712 Valid, 1832 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 20:53:12,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2022-07-22 20:53:12,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1813. [2022-07-22 20:53:12,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1468 states have (on average 1.3208446866485013) internal successors, (1939), 1489 states have internal predecessors, (1939), 190 states have call successors, (190), 121 states have call predecessors, (190), 153 states have return successors, (236), 204 states have call predecessors, (236), 186 states have call successors, (236) [2022-07-22 20:53:12,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 2365 transitions. [2022-07-22 20:53:12,363 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 2365 transitions. Word has length 91 [2022-07-22 20:53:12,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:53:12,364 INFO L495 AbstractCegarLoop]: Abstraction has 1813 states and 2365 transitions. [2022-07-22 20:53:12,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-22 20:53:12,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 2365 transitions. [2022-07-22 20:53:12,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-22 20:53:12,365 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:53:12,365 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:53:12,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 20:53:12,366 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:53:12,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:53:12,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1161498813, now seen corresponding path program 1 times [2022-07-22 20:53:12,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:53:12,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658301225] [2022-07-22 20:53:12,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:53:12,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:53:12,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:12,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:53:12,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:12,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:53:12,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:12,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:53:12,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:12,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:53:12,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:12,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-22 20:53:12,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:12,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 20:53:12,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:12,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 20:53:12,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:12,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-22 20:53:12,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:12,439 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 20:53:12,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:53:12,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658301225] [2022-07-22 20:53:12,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658301225] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:53:12,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:53:12,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-22 20:53:12,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254168215] [2022-07-22 20:53:12,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:53:12,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 20:53:12,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:53:12,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 20:53:12,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-22 20:53:12,441 INFO L87 Difference]: Start difference. First operand 1813 states and 2365 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-22 20:53:13,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:53:13,555 INFO L93 Difference]: Finished difference Result 4231 states and 5448 transitions. [2022-07-22 20:53:13,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-22 20:53:13,556 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 92 [2022-07-22 20:53:13,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:53:13,564 INFO L225 Difference]: With dead ends: 4231 [2022-07-22 20:53:13,565 INFO L226 Difference]: Without dead ends: 2611 [2022-07-22 20:53:13,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2022-07-22 20:53:13,568 INFO L413 NwaCegarLoop]: 730 mSDtfsCounter, 2341 mSDsluCounter, 1733 mSDsCounter, 0 mSdLazyCounter, 1408 mSolverCounterSat, 482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2382 SdHoareTripleChecker+Valid, 2463 SdHoareTripleChecker+Invalid, 1890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 482 IncrementalHoareTripleChecker+Valid, 1408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 20:53:13,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2382 Valid, 2463 Invalid, 1890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [482 Valid, 1408 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 20:53:13,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2611 states. [2022-07-22 20:53:13,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2611 to 2434. [2022-07-22 20:53:13,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2434 states, 1935 states have (on average 1.2821705426356589) internal successors, (2481), 1964 states have internal predecessors, (2481), 267 states have call successors, (267), 169 states have call predecessors, (267), 230 states have return successors, (367), 302 states have call predecessors, (367), 263 states have call successors, (367) [2022-07-22 20:53:13,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2434 states to 2434 states and 3115 transitions. [2022-07-22 20:53:13,648 INFO L78 Accepts]: Start accepts. Automaton has 2434 states and 3115 transitions. Word has length 92 [2022-07-22 20:53:13,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:53:13,649 INFO L495 AbstractCegarLoop]: Abstraction has 2434 states and 3115 transitions. [2022-07-22 20:53:13,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-22 20:53:13,649 INFO L276 IsEmpty]: Start isEmpty. Operand 2434 states and 3115 transitions. [2022-07-22 20:53:13,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-07-22 20:53:13,650 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:53:13,651 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:53:13,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 20:53:13,651 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:53:13,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:53:13,651 INFO L85 PathProgramCache]: Analyzing trace with hash 173734590, now seen corresponding path program 1 times [2022-07-22 20:53:13,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:53:13,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549154612] [2022-07-22 20:53:13,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:53:13,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:53:13,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:13,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:53:13,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:13,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 20:53:13,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:13,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 20:53:13,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:13,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:53:13,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:13,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-22 20:53:13,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:13,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 20:53:13,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:13,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 20:53:13,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:13,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-22 20:53:13,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:13,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-22 20:53:13,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:13,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-07-22 20:53:13,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:13,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-07-22 20:53:13,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:13,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 20:53:13,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:13,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:53:13,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:13,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-07-22 20:53:13,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:13,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-22 20:53:13,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:13,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-07-22 20:53:13,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:13,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-07-22 20:53:13,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:13,731 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-22 20:53:13,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:53:13,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549154612] [2022-07-22 20:53:13,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549154612] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 20:53:13,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809942215] [2022-07-22 20:53:13,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:53:13,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:53:13,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:53:13,840 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) [2022-07-22 20:53:13,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 20:53:13,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:13,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 20:53:13,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:53:14,121 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-22 20:53:14,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 20:53:14,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809942215] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:53:14,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 20:53:14,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2022-07-22 20:53:14,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741597444] [2022-07-22 20:53:14,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:53:14,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:53:14,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:53:14,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:53:14,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-07-22 20:53:14,124 INFO L87 Difference]: Start difference. First operand 2434 states and 3115 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-07-22 20:53:14,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:53:14,211 INFO L93 Difference]: Finished difference Result 6360 states and 7944 transitions. [2022-07-22 20:53:14,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:53:14,212 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 163 [2022-07-22 20:53:14,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:53:14,256 INFO L225 Difference]: With dead ends: 6360 [2022-07-22 20:53:14,256 INFO L226 Difference]: Without dead ends: 4346 [2022-07-22 20:53:14,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-07-22 20:53:14,260 INFO L413 NwaCegarLoop]: 682 mSDtfsCounter, 61 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1331 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:53:14,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 1331 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:53:14,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4346 states. [2022-07-22 20:53:14,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4346 to 4304. [2022-07-22 20:53:14,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4304 states, 3392 states have (on average 1.2485259433962264) internal successors, (4235), 3444 states have internal predecessors, (4235), 474 states have call successors, (474), 330 states have call predecessors, (474), 436 states have return successors, (635), 531 states have call predecessors, (635), 470 states have call successors, (635) [2022-07-22 20:53:14,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4304 states to 4304 states and 5344 transitions. [2022-07-22 20:53:14,402 INFO L78 Accepts]: Start accepts. Automaton has 4304 states and 5344 transitions. Word has length 163 [2022-07-22 20:53:14,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:53:14,402 INFO L495 AbstractCegarLoop]: Abstraction has 4304 states and 5344 transitions. [2022-07-22 20:53:14,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-07-22 20:53:14,403 INFO L276 IsEmpty]: Start isEmpty. Operand 4304 states and 5344 transitions. [2022-07-22 20:53:14,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-22 20:53:14,405 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:53:14,405 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:53:14,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 20:53:14,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-22 20:53:14,620 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:53:14,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:53:14,620 INFO L85 PathProgramCache]: Analyzing trace with hash 2058139820, now seen corresponding path program 1 times [2022-07-22 20:53:14,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:53:14,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455521886] [2022-07-22 20:53:14,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:53:14,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:53:14,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:14,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:53:14,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:14,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 20:53:14,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:14,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-22 20:53:14,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:14,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-22 20:53:14,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:14,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-22 20:53:14,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:14,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:53:14,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:53:14,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455521886] [2022-07-22 20:53:14,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455521886] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:53:14,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:53:14,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 20:53:14,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715961039] [2022-07-22 20:53:14,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:53:14,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 20:53:14,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:53:14,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 20:53:14,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 20:53:14,705 INFO L87 Difference]: Start difference. First operand 4304 states and 5344 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 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) [2022-07-22 20:53:15,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:53:15,944 INFO L93 Difference]: Finished difference Result 4751 states and 6066 transitions. [2022-07-22 20:53:15,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 20:53:15,944 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 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 157 [2022-07-22 20:53:15,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:53:15,956 INFO L225 Difference]: With dead ends: 4751 [2022-07-22 20:53:15,957 INFO L226 Difference]: Without dead ends: 4424 [2022-07-22 20:53:15,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-22 20:53:15,958 INFO L413 NwaCegarLoop]: 719 mSDtfsCounter, 1003 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1025 SdHoareTripleChecker+Valid, 1268 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 20:53:15,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1025 Valid, 1268 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 20:53:15,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4424 states. [2022-07-22 20:53:16,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4424 to 4304. [2022-07-22 20:53:16,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4304 states, 3392 states have (on average 1.2482311320754718) internal successors, (4234), 3444 states have internal predecessors, (4234), 474 states have call successors, (474), 330 states have call predecessors, (474), 436 states have return successors, (635), 531 states have call predecessors, (635), 470 states have call successors, (635) [2022-07-22 20:53:16,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4304 states to 4304 states and 5343 transitions. [2022-07-22 20:53:16,170 INFO L78 Accepts]: Start accepts. Automaton has 4304 states and 5343 transitions. Word has length 157 [2022-07-22 20:53:16,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:53:16,170 INFO L495 AbstractCegarLoop]: Abstraction has 4304 states and 5343 transitions. [2022-07-22 20:53:16,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 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) [2022-07-22 20:53:16,171 INFO L276 IsEmpty]: Start isEmpty. Operand 4304 states and 5343 transitions. [2022-07-22 20:53:16,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-22 20:53:16,172 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:53:16,173 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:53:16,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 20:53:16,173 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:53:16,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:53:16,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1972179986, now seen corresponding path program 1 times [2022-07-22 20:53:16,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:53:16,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554368150] [2022-07-22 20:53:16,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:53:16,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:53:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:16,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:53:16,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:16,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 20:53:16,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:16,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-22 20:53:16,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:16,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-22 20:53:16,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:16,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-22 20:53:16,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:16,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:53:16,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:53:16,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554368150] [2022-07-22 20:53:16,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554368150] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:53:16,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:53:16,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 20:53:16,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910178535] [2022-07-22 20:53:16,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:53:16,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 20:53:16,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:53:16,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 20:53:16,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 20:53:16,269 INFO L87 Difference]: Start difference. First operand 4304 states and 5343 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 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) [2022-07-22 20:53:17,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:53:17,496 INFO L93 Difference]: Finished difference Result 4743 states and 6049 transitions. [2022-07-22 20:53:17,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 20:53:17,497 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 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 157 [2022-07-22 20:53:17,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:53:17,508 INFO L225 Difference]: With dead ends: 4743 [2022-07-22 20:53:17,508 INFO L226 Difference]: Without dead ends: 4424 [2022-07-22 20:53:17,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-22 20:53:17,511 INFO L413 NwaCegarLoop]: 718 mSDtfsCounter, 994 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 20:53:17,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1016 Valid, 1266 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 20:53:17,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4424 states. [2022-07-22 20:53:17,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4424 to 4304. [2022-07-22 20:53:17,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4304 states, 3392 states have (on average 1.247936320754717) internal successors, (4233), 3444 states have internal predecessors, (4233), 474 states have call successors, (474), 330 states have call predecessors, (474), 436 states have return successors, (635), 531 states have call predecessors, (635), 470 states have call successors, (635) [2022-07-22 20:53:17,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4304 states to 4304 states and 5342 transitions. [2022-07-22 20:53:17,709 INFO L78 Accepts]: Start accepts. Automaton has 4304 states and 5342 transitions. Word has length 157 [2022-07-22 20:53:17,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:53:17,709 INFO L495 AbstractCegarLoop]: Abstraction has 4304 states and 5342 transitions. [2022-07-22 20:53:17,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 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) [2022-07-22 20:53:17,709 INFO L276 IsEmpty]: Start isEmpty. Operand 4304 states and 5342 transitions. [2022-07-22 20:53:17,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-22 20:53:17,710 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:53:17,710 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:53:17,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 20:53:17,711 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:53:17,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:53:17,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1912176944, now seen corresponding path program 1 times [2022-07-22 20:53:17,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:53:17,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046133356] [2022-07-22 20:53:17,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:53:17,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:53:17,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:17,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:53:17,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:17,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 20:53:17,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:17,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-22 20:53:17,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:17,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-22 20:53:17,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:17,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-22 20:53:17,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:17,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:53:17,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:53:17,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046133356] [2022-07-22 20:53:17,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046133356] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:53:17,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:53:17,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 20:53:17,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733975283] [2022-07-22 20:53:17,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:53:17,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 20:53:17,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:53:17,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 20:53:17,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:53:17,802 INFO L87 Difference]: Start difference. First operand 4304 states and 5342 transitions. Second operand has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 4 states have internal predecessors, (146), 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) [2022-07-22 20:53:19,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:53:19,842 INFO L93 Difference]: Finished difference Result 5190 states and 6773 transitions. [2022-07-22 20:53:19,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 20:53:19,842 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 4 states have internal predecessors, (146), 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 157 [2022-07-22 20:53:19,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:53:19,857 INFO L225 Difference]: With dead ends: 5190 [2022-07-22 20:53:19,857 INFO L226 Difference]: Without dead ends: 4874 [2022-07-22 20:53:19,858 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 [2022-07-22 20:53:19,859 INFO L413 NwaCegarLoop]: 748 mSDtfsCounter, 1579 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 1844 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1608 SdHoareTripleChecker+Valid, 1782 SdHoareTripleChecker+Invalid, 2003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-22 20:53:19,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1608 Valid, 1782 Invalid, 2003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1844 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-22 20:53:19,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4874 states. [2022-07-22 20:53:20,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4874 to 4633. [2022-07-22 20:53:20,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4633 states, 3695 states have (on average 1.2765899864682002) internal successors, (4717), 3748 states have internal predecessors, (4717), 493 states have call successors, (493), 336 states have call predecessors, (493), 443 states have return successors, (657), 550 states have call predecessors, (657), 489 states have call successors, (657) [2022-07-22 20:53:20,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4633 states to 4633 states and 5867 transitions. [2022-07-22 20:53:20,078 INFO L78 Accepts]: Start accepts. Automaton has 4633 states and 5867 transitions. Word has length 157 [2022-07-22 20:53:20,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:53:20,078 INFO L495 AbstractCegarLoop]: Abstraction has 4633 states and 5867 transitions. [2022-07-22 20:53:20,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 4 states have internal predecessors, (146), 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) [2022-07-22 20:53:20,078 INFO L276 IsEmpty]: Start isEmpty. Operand 4633 states and 5867 transitions. [2022-07-22 20:53:20,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-22 20:53:20,080 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:53:20,080 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:53:20,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 20:53:20,080 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:53:20,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:53:20,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1716755156, now seen corresponding path program 1 times [2022-07-22 20:53:20,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:53:20,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393304721] [2022-07-22 20:53:20,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:53:20,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:53:20,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:20,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:53:20,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:20,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 20:53:20,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:20,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-22 20:53:20,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:20,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-22 20:53:20,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:20,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-22 20:53:20,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:20,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:53:20,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:53:20,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393304721] [2022-07-22 20:53:20,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393304721] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:53:20,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:53:20,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:53:20,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650880894] [2022-07-22 20:53:20,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:53:20,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:53:20,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:53:20,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:53:20,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:53:20,189 INFO L87 Difference]: Start difference. First operand 4633 states and 5867 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-22 20:53:22,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:53:22,667 INFO L93 Difference]: Finished difference Result 5983 states and 8049 transitions. [2022-07-22 20:53:22,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 20:53:22,668 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2022-07-22 20:53:22,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:53:22,676 INFO L225 Difference]: With dead ends: 5983 [2022-07-22 20:53:22,677 INFO L226 Difference]: Without dead ends: 5338 [2022-07-22 20:53:22,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-22 20:53:22,678 INFO L413 NwaCegarLoop]: 807 mSDtfsCounter, 1687 mSDsluCounter, 1394 mSDsCounter, 0 mSdLazyCounter, 2608 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1716 SdHoareTripleChecker+Valid, 2201 SdHoareTripleChecker+Invalid, 2756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 2608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-22 20:53:22,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1716 Valid, 2201 Invalid, 2756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 2608 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-22 20:53:22,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5338 states. [2022-07-22 20:53:22,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5338 to 4939. [2022-07-22 20:53:22,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4939 states, 3975 states have (on average 1.2968553459119496) internal successors, (5155), 4029 states have internal predecessors, (5155), 512 states have call successors, (512), 342 states have call predecessors, (512), 450 states have return successors, (678), 570 states have call predecessors, (678), 508 states have call successors, (678) [2022-07-22 20:53:22,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4939 states to 4939 states and 6345 transitions. [2022-07-22 20:53:22,881 INFO L78 Accepts]: Start accepts. Automaton has 4939 states and 6345 transitions. Word has length 157 [2022-07-22 20:53:22,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:53:22,881 INFO L495 AbstractCegarLoop]: Abstraction has 4939 states and 6345 transitions. [2022-07-22 20:53:22,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-22 20:53:22,882 INFO L276 IsEmpty]: Start isEmpty. Operand 4939 states and 6345 transitions. [2022-07-22 20:53:22,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-22 20:53:22,895 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:53:22,895 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:53:22,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 20:53:22,896 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:53:22,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:53:22,896 INFO L85 PathProgramCache]: Analyzing trace with hash -317801554, now seen corresponding path program 1 times [2022-07-22 20:53:22,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:53:22,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257823061] [2022-07-22 20:53:22,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:53:22,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:53:22,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:22,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:53:22,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:22,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 20:53:22,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:22,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-22 20:53:22,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:22,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-22 20:53:22,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:22,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-22 20:53:22,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:22,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:53:22,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:53:22,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257823061] [2022-07-22 20:53:22,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257823061] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:53:22,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:53:22,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:53:22,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253696014] [2022-07-22 20:53:22,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:53:22,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:53:22,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:53:22,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:53:22,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:53:22,985 INFO L87 Difference]: Start difference. First operand 4939 states and 6345 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-22 20:53:25,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:53:25,592 INFO L93 Difference]: Finished difference Result 7152 states and 9915 transitions. [2022-07-22 20:53:25,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 20:53:25,592 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2022-07-22 20:53:25,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:53:25,611 INFO L225 Difference]: With dead ends: 7152 [2022-07-22 20:53:25,611 INFO L226 Difference]: Without dead ends: 6201 [2022-07-22 20:53:25,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-22 20:53:25,618 INFO L413 NwaCegarLoop]: 1009 mSDtfsCounter, 1600 mSDsluCounter, 1936 mSDsCounter, 0 mSdLazyCounter, 2879 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1629 SdHoareTripleChecker+Valid, 2945 SdHoareTripleChecker+Invalid, 3003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 2879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-22 20:53:25,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1629 Valid, 2945 Invalid, 3003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 2879 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-22 20:53:25,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6201 states. [2022-07-22 20:53:25,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6201 to 5552. [2022-07-22 20:53:25,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5552 states, 4536 states have (on average 1.3298059964726632) internal successors, (6032), 4592 states have internal predecessors, (6032), 550 states have call successors, (550), 354 states have call predecessors, (550), 464 states have return successors, (724), 610 states have call predecessors, (724), 546 states have call successors, (724) [2022-07-22 20:53:25,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5552 states to 5552 states and 7306 transitions. [2022-07-22 20:53:25,876 INFO L78 Accepts]: Start accepts. Automaton has 5552 states and 7306 transitions. Word has length 157 [2022-07-22 20:53:25,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:53:25,876 INFO L495 AbstractCegarLoop]: Abstraction has 5552 states and 7306 transitions. [2022-07-22 20:53:25,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-22 20:53:25,877 INFO L276 IsEmpty]: Start isEmpty. Operand 5552 states and 7306 transitions. [2022-07-22 20:53:25,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-22 20:53:25,878 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:53:25,879 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:53:25,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 20:53:25,879 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:53:25,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:53:25,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1935242004, now seen corresponding path program 1 times [2022-07-22 20:53:25,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:53:25,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033058686] [2022-07-22 20:53:25,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:53:25,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:53:25,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:25,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:53:25,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:25,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 20:53:25,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:25,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-22 20:53:25,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:25,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-22 20:53:25,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:25,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-22 20:53:25,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:25,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:53:25,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:53:25,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033058686] [2022-07-22 20:53:25,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033058686] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:53:25,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:53:25,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:53:25,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971851559] [2022-07-22 20:53:25,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:53:25,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:53:25,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:53:25,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:53:25,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:53:25,992 INFO L87 Difference]: Start difference. First operand 5552 states and 7306 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-22 20:53:27,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:53:27,488 INFO L93 Difference]: Finished difference Result 7753 states and 10867 transitions. [2022-07-22 20:53:27,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 20:53:27,489 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2022-07-22 20:53:27,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:53:27,502 INFO L225 Difference]: With dead ends: 7753 [2022-07-22 20:53:27,502 INFO L226 Difference]: Without dead ends: 6189 [2022-07-22 20:53:27,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-22 20:53:27,507 INFO L413 NwaCegarLoop]: 688 mSDtfsCounter, 1208 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 1418 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1238 SdHoareTripleChecker+Valid, 1764 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 20:53:27,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1238 Valid, 1764 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1418 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-22 20:53:27,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6189 states. [2022-07-22 20:53:27,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6189 to 5552. [2022-07-22 20:53:27,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5552 states, 4536 states have (on average 1.3287037037037037) internal successors, (6027), 4592 states have internal predecessors, (6027), 550 states have call successors, (550), 354 states have call predecessors, (550), 464 states have return successors, (724), 610 states have call predecessors, (724), 546 states have call successors, (724) [2022-07-22 20:53:27,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5552 states to 5552 states and 7301 transitions. [2022-07-22 20:53:27,746 INFO L78 Accepts]: Start accepts. Automaton has 5552 states and 7301 transitions. Word has length 157 [2022-07-22 20:53:27,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:53:27,746 INFO L495 AbstractCegarLoop]: Abstraction has 5552 states and 7301 transitions. [2022-07-22 20:53:27,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-22 20:53:27,747 INFO L276 IsEmpty]: Start isEmpty. Operand 5552 states and 7301 transitions. [2022-07-22 20:53:27,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-22 20:53:27,748 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:53:27,749 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:53:27,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 20:53:27,749 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:53:27,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:53:27,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1571775506, now seen corresponding path program 1 times [2022-07-22 20:53:27,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:53:27,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73307106] [2022-07-22 20:53:27,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:53:27,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:53:27,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:27,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:53:27,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:27,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 20:53:27,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:27,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-22 20:53:27,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:27,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-22 20:53:27,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:27,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-22 20:53:27,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:27,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:53:27,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:53:27,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73307106] [2022-07-22 20:53:27,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73307106] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:53:27,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:53:27,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:53:27,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849475706] [2022-07-22 20:53:27,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:53:27,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:53:27,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:53:27,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:53:27,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:53:27,858 INFO L87 Difference]: Start difference. First operand 5552 states and 7301 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-22 20:53:29,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:53:29,252 INFO L93 Difference]: Finished difference Result 7747 states and 10841 transitions. [2022-07-22 20:53:29,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 20:53:29,252 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2022-07-22 20:53:29,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:53:29,263 INFO L225 Difference]: With dead ends: 7747 [2022-07-22 20:53:29,264 INFO L226 Difference]: Without dead ends: 6183 [2022-07-22 20:53:29,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-22 20:53:29,268 INFO L413 NwaCegarLoop]: 684 mSDtfsCounter, 1405 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 1248 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1435 SdHoareTripleChecker+Valid, 1524 SdHoareTripleChecker+Invalid, 1420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:53:29,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1435 Valid, 1524 Invalid, 1420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1248 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 20:53:29,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6183 states. [2022-07-22 20:53:29,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6183 to 5552. [2022-07-22 20:53:29,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5552 states, 4536 states have (on average 1.3276014109347443) internal successors, (6022), 4592 states have internal predecessors, (6022), 550 states have call successors, (550), 354 states have call predecessors, (550), 464 states have return successors, (724), 610 states have call predecessors, (724), 546 states have call successors, (724) [2022-07-22 20:53:29,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5552 states to 5552 states and 7296 transitions. [2022-07-22 20:53:29,546 INFO L78 Accepts]: Start accepts. Automaton has 5552 states and 7296 transitions. Word has length 157 [2022-07-22 20:53:29,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:53:29,547 INFO L495 AbstractCegarLoop]: Abstraction has 5552 states and 7296 transitions. [2022-07-22 20:53:29,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-22 20:53:29,547 INFO L276 IsEmpty]: Start isEmpty. Operand 5552 states and 7296 transitions. [2022-07-22 20:53:29,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-22 20:53:29,550 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:53:29,550 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:53:29,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-22 20:53:29,550 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:53:29,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:53:29,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1282956116, now seen corresponding path program 1 times [2022-07-22 20:53:29,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:53:29,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439899877] [2022-07-22 20:53:29,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:53:29,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:53:29,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:29,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:53:29,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:29,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 20:53:29,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:29,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-22 20:53:29,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:29,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-22 20:53:29,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:29,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-22 20:53:29,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:29,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:53:29,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:53:29,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439899877] [2022-07-22 20:53:29,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439899877] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:53:29,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:53:29,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:53:29,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673404561] [2022-07-22 20:53:29,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:53:29,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:53:29,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:53:29,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:53:29,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:53:29,651 INFO L87 Difference]: Start difference. First operand 5552 states and 7296 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-22 20:53:32,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:53:32,258 INFO L93 Difference]: Finished difference Result 9386 states and 13410 transitions. [2022-07-22 20:53:32,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 20:53:32,258 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2022-07-22 20:53:32,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:53:32,273 INFO L225 Difference]: With dead ends: 9386 [2022-07-22 20:53:32,273 INFO L226 Difference]: Without dead ends: 7822 [2022-07-22 20:53:32,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-22 20:53:32,276 INFO L413 NwaCegarLoop]: 989 mSDtfsCounter, 1579 mSDsluCounter, 1936 mSDsCounter, 0 mSdLazyCounter, 2843 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1608 SdHoareTripleChecker+Valid, 2925 SdHoareTripleChecker+Invalid, 2970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 2843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-22 20:53:32,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1608 Valid, 2925 Invalid, 2970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 2843 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-22 20:53:32,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7822 states. [2022-07-22 20:53:32,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7822 to 6787. [2022-07-22 20:53:32,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6787 states, 5667 states have (on average 1.3725074995588495) internal successors, (7778), 5727 states have internal predecessors, (7778), 626 states have call successors, (626), 378 states have call predecessors, (626), 492 states have return successors, (822), 690 states have call predecessors, (822), 622 states have call successors, (822) [2022-07-22 20:53:32,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6787 states to 6787 states and 9226 transitions. [2022-07-22 20:53:32,621 INFO L78 Accepts]: Start accepts. Automaton has 6787 states and 9226 transitions. Word has length 157 [2022-07-22 20:53:32,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:53:32,622 INFO L495 AbstractCegarLoop]: Abstraction has 6787 states and 9226 transitions. [2022-07-22 20:53:32,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-22 20:53:32,622 INFO L276 IsEmpty]: Start isEmpty. Operand 6787 states and 9226 transitions. [2022-07-22 20:53:32,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-22 20:53:32,624 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:53:32,624 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:53:32,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-22 20:53:32,625 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:53:32,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:53:32,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1827828690, now seen corresponding path program 1 times [2022-07-22 20:53:32,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:53:32,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360741825] [2022-07-22 20:53:32,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:53:32,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:53:32,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:32,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:53:32,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:32,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 20:53:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:32,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-22 20:53:32,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:32,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-22 20:53:32,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:32,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-22 20:53:32,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:32,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:53:32,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:53:32,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360741825] [2022-07-22 20:53:32,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360741825] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:53:32,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:53:32,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:53:32,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708365150] [2022-07-22 20:53:32,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:53:32,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:53:32,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:53:32,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:53:32,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:53:32,706 INFO L87 Difference]: Start difference. First operand 6787 states and 9226 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-22 20:53:35,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:53:35,556 INFO L93 Difference]: Finished difference Result 13873 states and 20504 transitions. [2022-07-22 20:53:35,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 20:53:35,557 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2022-07-22 20:53:35,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:53:35,583 INFO L225 Difference]: With dead ends: 13873 [2022-07-22 20:53:35,583 INFO L226 Difference]: Without dead ends: 11074 [2022-07-22 20:53:35,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-22 20:53:35,592 INFO L413 NwaCegarLoop]: 981 mSDtfsCounter, 1574 mSDsluCounter, 1936 mSDsCounter, 0 mSdLazyCounter, 2823 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1603 SdHoareTripleChecker+Valid, 2917 SdHoareTripleChecker+Invalid, 2951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 2823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-22 20:53:35,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1603 Valid, 2917 Invalid, 2951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 2823 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-22 20:53:35,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11074 states. [2022-07-22 20:53:36,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11074 to 9268. [2022-07-22 20:53:36,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9268 states, 7940 states have (on average 1.4241813602015114) internal successors, (11308), 8008 states have internal predecessors, (11308), 778 states have call successors, (778), 426 states have call predecessors, (778), 548 states have return successors, (1036), 850 states have call predecessors, (1036), 774 states have call successors, (1036) [2022-07-22 20:53:36,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9268 states to 9268 states and 13122 transitions. [2022-07-22 20:53:36,167 INFO L78 Accepts]: Start accepts. Automaton has 9268 states and 13122 transitions. Word has length 157 [2022-07-22 20:53:36,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:53:36,167 INFO L495 AbstractCegarLoop]: Abstraction has 9268 states and 13122 transitions. [2022-07-22 20:53:36,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-22 20:53:36,167 INFO L276 IsEmpty]: Start isEmpty. Operand 9268 states and 13122 transitions. [2022-07-22 20:53:36,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-22 20:53:36,171 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:53:36,171 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:53:36,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-22 20:53:36,172 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:53:36,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:53:36,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1519086640, now seen corresponding path program 1 times [2022-07-22 20:53:36,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:53:36,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073301598] [2022-07-22 20:53:36,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:53:36,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:53:36,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:36,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:53:36,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:36,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 20:53:36,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:36,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-22 20:53:36,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:36,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-22 20:53:36,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:36,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-22 20:53:36,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:36,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:53:36,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:53:36,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073301598] [2022-07-22 20:53:36,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073301598] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:53:36,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:53:36,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:53:36,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218277686] [2022-07-22 20:53:36,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:53:36,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:53:36,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:53:36,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:53:36,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:53:36,260 INFO L87 Difference]: Start difference. First operand 9268 states and 13122 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-22 20:53:38,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:53:38,052 INFO L93 Difference]: Finished difference Result 16422 states and 24605 transitions. [2022-07-22 20:53:38,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 20:53:38,053 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2022-07-22 20:53:38,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:53:38,077 INFO L225 Difference]: With dead ends: 16422 [2022-07-22 20:53:38,078 INFO L226 Difference]: Without dead ends: 11142 [2022-07-22 20:53:38,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-22 20:53:38,091 INFO L413 NwaCegarLoop]: 670 mSDtfsCounter, 1207 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 1371 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1237 SdHoareTripleChecker+Valid, 1746 SdHoareTripleChecker+Invalid, 1502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:53:38,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1237 Valid, 1746 Invalid, 1502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1371 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 20:53:38,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11142 states. [2022-07-22 20:53:38,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11142 to 9268. [2022-07-22 20:53:38,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9268 states, 7940 states have (on average 1.4220403022670025) internal successors, (11291), 8008 states have internal predecessors, (11291), 778 states have call successors, (778), 426 states have call predecessors, (778), 548 states have return successors, (1036), 850 states have call predecessors, (1036), 774 states have call successors, (1036) [2022-07-22 20:53:38,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9268 states to 9268 states and 13105 transitions. [2022-07-22 20:53:38,626 INFO L78 Accepts]: Start accepts. Automaton has 9268 states and 13105 transitions. Word has length 157 [2022-07-22 20:53:38,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:53:38,626 INFO L495 AbstractCegarLoop]: Abstraction has 9268 states and 13105 transitions. [2022-07-22 20:53:38,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-22 20:53:38,626 INFO L276 IsEmpty]: Start isEmpty. Operand 9268 states and 13105 transitions. [2022-07-22 20:53:38,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-22 20:53:38,629 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:53:38,629 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:53:38,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-22 20:53:38,630 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:53:38,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:53:38,630 INFO L85 PathProgramCache]: Analyzing trace with hash 934314990, now seen corresponding path program 1 times [2022-07-22 20:53:38,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:53:38,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355937884] [2022-07-22 20:53:38,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:53:38,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:53:38,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:38,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:53:38,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:38,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 20:53:38,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:38,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-22 20:53:38,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:38,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-22 20:53:38,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:38,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-22 20:53:38,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:38,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:53:38,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:53:38,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355937884] [2022-07-22 20:53:38,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355937884] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:53:38,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:53:38,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:53:38,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823005133] [2022-07-22 20:53:38,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:53:38,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:53:38,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:53:38,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:53:38,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:53:38,726 INFO L87 Difference]: Start difference. First operand 9268 states and 13105 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-22 20:53:41,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:53:41,981 INFO L93 Difference]: Finished difference Result 22844 states and 34658 transitions. [2022-07-22 20:53:41,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 20:53:41,982 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2022-07-22 20:53:41,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:53:42,022 INFO L225 Difference]: With dead ends: 22844 [2022-07-22 20:53:42,023 INFO L226 Difference]: Without dead ends: 17564 [2022-07-22 20:53:42,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-22 20:53:42,038 INFO L413 NwaCegarLoop]: 758 mSDtfsCounter, 1656 mSDsluCounter, 1354 mSDsCounter, 0 mSdLazyCounter, 2519 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1685 SdHoareTripleChecker+Valid, 2112 SdHoareTripleChecker+Invalid, 2685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 2519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-22 20:53:42,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1685 Valid, 2112 Invalid, 2685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 2519 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-22 20:53:42,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17564 states. [2022-07-22 20:53:42,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17564 to 14260. [2022-07-22 20:53:42,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14260 states, 12516 states have (on average 1.4678012144455097) internal successors, (18371), 12600 states have internal predecessors, (18371), 1082 states have call successors, (1082), 522 states have call predecessors, (1082), 660 states have return successors, (1518), 1170 states have call predecessors, (1518), 1078 states have call successors, (1518) [2022-07-22 20:53:42,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14260 states to 14260 states and 20971 transitions. [2022-07-22 20:53:42,888 INFO L78 Accepts]: Start accepts. Automaton has 14260 states and 20971 transitions. Word has length 157 [2022-07-22 20:53:42,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:53:42,888 INFO L495 AbstractCegarLoop]: Abstraction has 14260 states and 20971 transitions. [2022-07-22 20:53:42,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-22 20:53:42,889 INFO L276 IsEmpty]: Start isEmpty. Operand 14260 states and 20971 transitions. [2022-07-22 20:53:42,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-22 20:53:42,894 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:53:42,894 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:53:42,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-22 20:53:42,894 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:53:42,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:53:42,895 INFO L85 PathProgramCache]: Analyzing trace with hash 499809392, now seen corresponding path program 1 times [2022-07-22 20:53:42,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:53:42,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503428668] [2022-07-22 20:53:42,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:53:42,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:53:42,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:42,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:53:42,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:42,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 20:53:42,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:42,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-22 20:53:42,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:42,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-22 20:53:42,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:42,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-22 20:53:42,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:42,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:53:42,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:53:42,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503428668] [2022-07-22 20:53:42,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503428668] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:53:42,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:53:42,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:53:42,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506451878] [2022-07-22 20:53:42,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:53:42,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:53:42,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:53:42,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:53:42,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:53:43,000 INFO L87 Difference]: Start difference. First operand 14260 states and 20971 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-22 20:53:45,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:53:45,313 INFO L93 Difference]: Finished difference Result 27986 states and 43032 transitions. [2022-07-22 20:53:45,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 20:53:45,313 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2022-07-22 20:53:45,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:53:45,350 INFO L225 Difference]: With dead ends: 27986 [2022-07-22 20:53:45,350 INFO L226 Difference]: Without dead ends: 17714 [2022-07-22 20:53:45,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-22 20:53:45,368 INFO L413 NwaCegarLoop]: 663 mSDtfsCounter, 1405 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1435 SdHoareTripleChecker+Valid, 1503 SdHoareTripleChecker+Invalid, 1381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 20:53:45,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1435 Valid, 1503 Invalid, 1381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 20:53:45,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17714 states. [2022-07-22 20:53:46,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17714 to 14260. [2022-07-22 20:53:46,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14260 states, 12516 states have (on average 1.465164589325663) internal successors, (18338), 12600 states have internal predecessors, (18338), 1082 states have call successors, (1082), 522 states have call predecessors, (1082), 660 states have return successors, (1518), 1170 states have call predecessors, (1518), 1078 states have call successors, (1518) [2022-07-22 20:53:46,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14260 states to 14260 states and 20938 transitions. [2022-07-22 20:53:46,252 INFO L78 Accepts]: Start accepts. Automaton has 14260 states and 20938 transitions. Word has length 157 [2022-07-22 20:53:46,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:53:46,252 INFO L495 AbstractCegarLoop]: Abstraction has 14260 states and 20938 transitions. [2022-07-22 20:53:46,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-22 20:53:46,253 INFO L276 IsEmpty]: Start isEmpty. Operand 14260 states and 20938 transitions. [2022-07-22 20:53:46,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-22 20:53:46,258 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:53:46,258 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:53:46,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-22 20:53:46,258 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:53:46,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:53:46,258 INFO L85 PathProgramCache]: Analyzing trace with hash 70151086, now seen corresponding path program 1 times [2022-07-22 20:53:46,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:53:46,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582752414] [2022-07-22 20:53:46,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:53:46,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:53:46,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:46,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:53:46,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:46,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 20:53:46,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:46,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-22 20:53:46,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:46,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-22 20:53:46,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:46,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-22 20:53:46,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:46,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:53:46,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:53:46,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582752414] [2022-07-22 20:53:46,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582752414] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:53:46,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:53:46,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:53:46,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046217633] [2022-07-22 20:53:46,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:53:46,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:53:46,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:53:46,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:53:46,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:53:46,339 INFO L87 Difference]: Start difference. First operand 14260 states and 20938 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-22 20:53:48,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:53:48,714 INFO L93 Difference]: Finished difference Result 27952 states and 42865 transitions. [2022-07-22 20:53:48,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 20:53:48,715 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2022-07-22 20:53:48,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:53:48,753 INFO L225 Difference]: With dead ends: 27952 [2022-07-22 20:53:48,753 INFO L226 Difference]: Without dead ends: 17680 [2022-07-22 20:53:48,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-22 20:53:48,771 INFO L413 NwaCegarLoop]: 659 mSDtfsCounter, 1202 mSDsluCounter, 1074 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1232 SdHoareTripleChecker+Valid, 1733 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:53:48,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1232 Valid, 1733 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 20:53:48,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17680 states. [2022-07-22 20:53:49,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17680 to 14260. [2022-07-22 20:53:49,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14260 states, 12516 states have (on average 1.4625279642058167) internal successors, (18305), 12600 states have internal predecessors, (18305), 1082 states have call successors, (1082), 522 states have call predecessors, (1082), 660 states have return successors, (1518), 1170 states have call predecessors, (1518), 1078 states have call successors, (1518) [2022-07-22 20:53:49,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14260 states to 14260 states and 20905 transitions. [2022-07-22 20:53:49,748 INFO L78 Accepts]: Start accepts. Automaton has 14260 states and 20905 transitions. Word has length 157 [2022-07-22 20:53:49,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:53:49,748 INFO L495 AbstractCegarLoop]: Abstraction has 14260 states and 20905 transitions. [2022-07-22 20:53:49,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-22 20:53:49,749 INFO L276 IsEmpty]: Start isEmpty. Operand 14260 states and 20905 transitions. [2022-07-22 20:53:49,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-22 20:53:49,755 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:53:49,755 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:53:49,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-22 20:53:49,755 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:53:49,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:53:49,756 INFO L85 PathProgramCache]: Analyzing trace with hash -636445520, now seen corresponding path program 1 times [2022-07-22 20:53:49,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:53:49,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085692035] [2022-07-22 20:53:49,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:53:49,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:53:49,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:49,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:53:49,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:49,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 20:53:49,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:49,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-22 20:53:49,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:49,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-22 20:53:49,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:49,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-22 20:53:49,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:53:49,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:53:49,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085692035] [2022-07-22 20:53:49,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085692035] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:53:49,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:53:49,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:53:49,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716126178] [2022-07-22 20:53:49,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:53:49,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:53:49,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:53:49,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:53:49,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:53:49,873 INFO L87 Difference]: Start difference. First operand 14260 states and 20905 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-22 20:53:55,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:53:55,593 INFO L93 Difference]: Finished difference Result 45138 states and 69592 transitions. [2022-07-22 20:53:55,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 20:53:55,593 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2022-07-22 20:53:55,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:53:55,672 INFO L225 Difference]: With dead ends: 45138 [2022-07-22 20:53:55,672 INFO L226 Difference]: Without dead ends: 34866 [2022-07-22 20:53:55,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-22 20:53:55,696 INFO L413 NwaCegarLoop]: 950 mSDtfsCounter, 1919 mSDsluCounter, 1925 mSDsCounter, 0 mSdLazyCounter, 2742 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1959 SdHoareTripleChecker+Valid, 2875 SdHoareTripleChecker+Invalid, 2875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 2742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:53:55,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1959 Valid, 2875 Invalid, 2875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 2742 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-22 20:53:55,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34866 states. [2022-07-22 20:53:57,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34866 to 23923. [2022-07-22 20:53:57,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23923 states, 21379 states have (on average 1.4907619626736517) internal successors, (31871), 21495 states have internal predecessors, (31871), 1658 states have call successors, (1658), 714 states have call predecessors, (1658), 884 states have return successors, (2612), 1778 states have call predecessors, (2612), 1654 states have call successors, (2612) [2022-07-22 20:53:57,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23923 states to 23923 states and 36141 transitions. [2022-07-22 20:53:57,685 INFO L78 Accepts]: Start accepts. Automaton has 23923 states and 36141 transitions. Word has length 157 [2022-07-22 20:53:57,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:53:57,685 INFO L495 AbstractCegarLoop]: Abstraction has 23923 states and 36141 transitions. [2022-07-22 20:53:57,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-22 20:53:57,685 INFO L276 IsEmpty]: Start isEmpty. Operand 23923 states and 36141 transitions. [2022-07-22 20:53:57,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-22 20:53:57,693 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:53:57,693 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:53:57,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-22 20:53:57,693 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:53:57,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:53:57,693 INFO L85 PathProgramCache]: Analyzing trace with hash 310592366, now seen corresponding path program 1 times [2022-07-22 20:53:57,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:53:57,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500423552] [2022-07-22 20:53:57,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:53:57,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:53:57,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:57,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:53:57,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:57,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 20:53:57,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:57,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-22 20:53:57,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:57,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-22 20:53:57,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:57,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-22 20:53:57,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:53:57,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:53:57,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:53:57,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500423552] [2022-07-22 20:53:57,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500423552] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:53:57,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:53:57,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:53:57,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638684467] [2022-07-22 20:53:57,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:53:57,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:53:57,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:53:57,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:53:57,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:53:57,772 INFO L87 Difference]: Start difference. First operand 23923 states and 36141 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-22 20:54:07,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:54:07,335 INFO L93 Difference]: Finished difference Result 83399 states and 130394 transitions. [2022-07-22 20:54:07,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 20:54:07,335 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2022-07-22 20:54:07,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:54:07,508 INFO L225 Difference]: With dead ends: 83399 [2022-07-22 20:54:07,508 INFO L226 Difference]: Without dead ends: 63464 [2022-07-22 20:54:07,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-22 20:54:07,562 INFO L413 NwaCegarLoop]: 1084 mSDtfsCounter, 1636 mSDsluCounter, 1928 mSDsCounter, 0 mSdLazyCounter, 3156 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1664 SdHoareTripleChecker+Valid, 3012 SdHoareTripleChecker+Invalid, 3289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 3156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 20:54:07,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1664 Valid, 3012 Invalid, 3289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 3156 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 20:54:07,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63464 states. [2022-07-22 20:54:11,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63464 to 43532. [2022-07-22 20:54:11,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43532 states, 39420 states have (on average 1.5119482496194825) internal successors, (59601), 39600 states have internal predecessors, (59601), 2778 states have call successors, (2778), 1098 states have call predecessors, (2778), 1332 states have return successors, (5254), 2962 states have call predecessors, (5254), 2774 states have call successors, (5254) [2022-07-22 20:54:11,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43532 states to 43532 states and 67633 transitions. [2022-07-22 20:54:11,282 INFO L78 Accepts]: Start accepts. Automaton has 43532 states and 67633 transitions. Word has length 157 [2022-07-22 20:54:11,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:54:11,283 INFO L495 AbstractCegarLoop]: Abstraction has 43532 states and 67633 transitions. [2022-07-22 20:54:11,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-22 20:54:11,283 INFO L276 IsEmpty]: Start isEmpty. Operand 43532 states and 67633 transitions. [2022-07-22 20:54:11,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-22 20:54:11,298 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:54:11,298 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:54:11,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-22 20:54:11,299 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:54:11,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:54:11,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1172425968, now seen corresponding path program 1 times [2022-07-22 20:54:11,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:54:11,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856933050] [2022-07-22 20:54:11,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:54:11,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:54:11,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:54:11,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:54:11,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:54:11,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 20:54:11,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:54:11,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-22 20:54:11,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:54:11,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-22 20:54:11,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:54:11,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-22 20:54:11,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:54:11,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:54:11,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:54:11,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856933050] [2022-07-22 20:54:11,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856933050] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:54:11,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:54:11,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:54:11,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296656878] [2022-07-22 20:54:11,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:54:11,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:54:11,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:54:11,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:54:11,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:54:11,386 INFO L87 Difference]: Start difference. First operand 43532 states and 67633 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-22 20:54:27,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:54:27,560 INFO L93 Difference]: Finished difference Result 157708 states and 250892 transitions. [2022-07-22 20:54:27,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 20:54:27,560 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2022-07-22 20:54:27,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:54:27,941 INFO L225 Difference]: With dead ends: 157708 [2022-07-22 20:54:27,941 INFO L226 Difference]: Without dead ends: 118164 [2022-07-22 20:54:28,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-22 20:54:28,059 INFO L413 NwaCegarLoop]: 935 mSDtfsCounter, 1800 mSDsluCounter, 1928 mSDsCounter, 0 mSdLazyCounter, 2714 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1840 SdHoareTripleChecker+Valid, 2863 SdHoareTripleChecker+Invalid, 2850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 2714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:54:28,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1840 Valid, 2863 Invalid, 2850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 2714 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-22 20:54:28,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118164 states. [2022-07-22 20:54:35,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118164 to 82814. [2022-07-22 20:54:35,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82814 states, 75630 states have (on average 1.525598307549914) internal successors, (115381), 75938 states have internal predecessors, (115381), 4954 states have call successors, (4954), 1866 states have call predecessors, (4954), 2228 states have return successors, (11932), 5266 states have call predecessors, (11932), 4950 states have call successors, (11932) [2022-07-22 20:54:36,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82814 states to 82814 states and 132267 transitions. [2022-07-22 20:54:36,081 INFO L78 Accepts]: Start accepts. Automaton has 82814 states and 132267 transitions. Word has length 157 [2022-07-22 20:54:36,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:54:36,082 INFO L495 AbstractCegarLoop]: Abstraction has 82814 states and 132267 transitions. [2022-07-22 20:54:36,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-22 20:54:36,082 INFO L276 IsEmpty]: Start isEmpty. Operand 82814 states and 132267 transitions. [2022-07-22 20:54:36,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-22 20:54:36,113 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:54:36,113 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:54:36,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-22 20:54:36,113 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:54:36,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:54:36,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1660473074, now seen corresponding path program 1 times [2022-07-22 20:54:36,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:54:36,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482644122] [2022-07-22 20:54:36,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:54:36,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:54:36,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:54:36,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:54:36,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:54:36,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 20:54:36,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:54:36,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-22 20:54:36,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:54:36,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-22 20:54:36,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:54:36,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-22 20:54:36,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:54:36,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:54:36,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:54:36,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482644122] [2022-07-22 20:54:36,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482644122] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:54:36,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:54:36,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:54:36,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651905225] [2022-07-22 20:54:36,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:54:36,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:54:36,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:54:36,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:54:36,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:54:36,211 INFO L87 Difference]: Start difference. First operand 82814 states and 132267 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-22 20:55:06,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:55:06,535 INFO L93 Difference]: Finished difference Result 306012 states and 497028 transitions. [2022-07-22 20:55:06,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 20:55:06,535 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2022-07-22 20:55:06,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:55:07,785 INFO L225 Difference]: With dead ends: 306012 [2022-07-22 20:55:07,785 INFO L226 Difference]: Without dead ends: 227186 [2022-07-22 20:55:07,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-22 20:55:07,964 INFO L413 NwaCegarLoop]: 1022 mSDtfsCounter, 1600 mSDsluCounter, 1928 mSDsCounter, 0 mSdLazyCounter, 3025 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1628 SdHoareTripleChecker+Valid, 2950 SdHoareTripleChecker+Invalid, 3158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 3025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-22 20:55:07,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1628 Valid, 2950 Invalid, 3158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 3025 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-22 20:55:08,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227186 states. [2022-07-22 20:55:22,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227186 to 161247. [2022-07-22 20:55:22,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161247 states, 148047 states have (on average 1.5337223989678954) internal successors, (227063), 148611 states have internal predecessors, (227063), 9178 states have call successors, (9178), 3402 states have call predecessors, (9178), 4020 states have return successors, (29534), 9746 states have call predecessors, (29534), 9174 states have call successors, (29534) [2022-07-22 20:55:23,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161247 states to 161247 states and 265775 transitions. [2022-07-22 20:55:23,575 INFO L78 Accepts]: Start accepts. Automaton has 161247 states and 265775 transitions. Word has length 157 [2022-07-22 20:55:23,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:55:23,576 INFO L495 AbstractCegarLoop]: Abstraction has 161247 states and 265775 transitions. [2022-07-22 20:55:23,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-22 20:55:23,576 INFO L276 IsEmpty]: Start isEmpty. Operand 161247 states and 265775 transitions. [2022-07-22 20:55:23,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-22 20:55:23,626 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:55:23,626 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:55:23,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-22 20:55:23,626 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:55:23,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:55:23,626 INFO L85 PathProgramCache]: Analyzing trace with hash 567837872, now seen corresponding path program 1 times [2022-07-22 20:55:23,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:55:23,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442447798] [2022-07-22 20:55:23,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:55:23,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:55:23,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:55:23,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:55:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:55:23,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 20:55:23,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:55:23,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-22 20:55:23,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:55:23,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-22 20:55:23,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:55:23,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-22 20:55:23,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:55:23,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:55:23,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:55:23,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442447798] [2022-07-22 20:55:23,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442447798] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:55:23,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:55:23,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:55:23,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889866934] [2022-07-22 20:55:23,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:55:23,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:55:23,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:55:23,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:55:23,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:55:23,726 INFO L87 Difference]: Start difference. First operand 161247 states and 265775 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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)